Claims:We Claim:
1. A two planner self-aligning wind-turbine blade support mechanism is characterized by:
a) a cage (50) containing cage ring (60) placed between a left support (170) and right support (180);
b) a cage ring (60) having a mounting face (63) and a non-mounting face (64);
c) a mounting face (63) adjoined with root face (111) of blade (110) and non-mounting face (64) placed in the working space (190);
d) a positive motion drive connected with the periphery of the cage ring (60) for rotation of the cage ring (60);
e) a swivel block (124) connected with left end (171) and right end (181) of the cage (50) and moving on a follower block (121) for transverse swivel motion of the cage (50);
f) a swivel bearing (131) connected with swivel block (124) for longitudinal swivel motion of the cage (50).

2. The two planner self-aligning wind-turbine blade support mechanism as claimed in claim 1, wherein follower block (121) is attached with the fixture housing (123) of left support (170) and right support (180) through follower fixture (122).

3. The two planner self-aligning wind-turbine blade support mechanism as claimed in claim 1, wherein a swivel block (124) connected with left end (171) of the cage (50) and right end (181) of the cage (50) follows the curvilinear motion over the profile (125) of the follower block (121).

4. The two planner self-aligning wind-turbine blade support mechanism as claimed in claim 1, wherein follower block (121) contains sinusoidal type single helix profile.

5. The two planner self-aligning wind-turbine blade support mechanism as claimed in claim 1, wherein swivel bearing (131) is integrally connected with the swivel block (124).

6. The two planner self-aligning wind-turbine blade support mechanism as claimed in claim 1, wherein guide rolls (90) communicating with mounting face (63) and non-mounting face (64) of the cage ring (60) separates cage ring (60) from the cage (50) for friction free rotation of cage ring (60) inside the cage (50).

7. The two planner self-aligning wind-turbine blade support mechanism as claimed in claim 1, wherein guide rolls (90) are placed in the recesses (51) of the cage (50) at the angular interval of 20 ° to 60 °.

8. The two planner self-aligning wind-turbine blade support mechanism as claimed in claim 1, wherein edge guide (100) attached with the cage (50) guides edge of the non-mounting face (64) for limiting deviation in rotation of cage ring (60).

9. The two planner self-aligning wind-turbine blade support mechanism as claimed in claim 1, wherein motor assembly (70) is connected with cage (50) in an overhanging arrangement allowing swivel motion of the motor assembly (70) with motion of cage (50).

10. The two planner self-aligning wind-turbine blade support mechanism as claimed in claim 1, wherein positive motion drive is selected from chain ring (69) with set of thin sprocket ring (71), bull gear and pinion, and timing belt with pulleys.

11. The two planner self-aligning wind-turbine blade support mechanism as claimed in claim 1, wherein a chain ring (69) communicating with the sprocket ring (71) is affixed onto the periphery of the cage ring (60) through chain fixture (68).

12. The two planner self-aligning wind-turbine blade support mechanism as claimed in claim 1, wherein a limit block (67) positioned between ends of the chain ring (69) communicates with cage (50) to limit rotation of cage ring (60).

13. The two planner self-aligning wind- turbine blade support mechanism as claimed in claim 1, wherein root face (111) of banana shaped wind-turbine blade (110) is fastened over 360 ° circumference of the mounting face (63) of self-aligning turner mechanism (20).

14. The two planner self-aligning wind-turbine blade support mechanism as claimed in claim 1, wherein self-swivel motion of the cage (50) in longitudinal direction and transverse direction keeps the centre of gravity of the banana shaped wind-turbine blade (110) in line with centre of rotation of turner mechanism (20).

15. The two planner self-aligning wind-turbine blade support mechanism as claimed in claim 1, wherein spring loaded limit studs (132) are placed in communication with lower half of the cage (50) to limit the motion of the cage (50) in the longitudinal direction.

16. The two planner self-aligning wind-turbine blade support mechanism as claimed in claim 1, wherein angle between limit stud (132) and the cage (50) is selected from 25 °-55 °, 55 °-70 °, 70 °-85 °, 90 °, 95 °-110 °, 110 °-145 °, and 145 °-165 °.

17. The two planner self-aligning wind-turbine blade support mechanism as claimed in claim 1, wherein cage (50) placed over the base (40) involves degree of freedom around X axis for rotational motion, around Y axis for the self-swivel motion, and around Z axis for another self-swivel motion.

18. The two planner self-aligning wind-turbine blade support mechanism as claimed in claim 1, wherein arrangement of follower block (121) and the swivel block (124) allows self-swivel motion of the cage (50) in transverse direction.

19. The two planner self-aligning wind-turbine blade support mechanism as claimed in claim 1, wherein frictionless characteristics of the swivel bearing (131) allows self-swivel motion of the cage (50) in the longitudinal direction.

20. The two planner self-aligning wind-turbine blade support mechanism as claimed in claim 1, wherein direction of swivel of the cage (50) in the transverse direction is selected from:
a) cage (50) at the left support side (170) remain stationary and right support side (180) follow swivel movement;
b) cage (50) at the right support side (180) remain stationary and left support side (170) follow swivel movement;
c) cage (50) at left support (170) and at right support (180) follow clockwise swivel motion;
d) cage (50) at left support (170) and at right support (180) follow counter-clockwise swivel motion.

21. The two planner self-aligning wind- turbine blade support mechanism as claimed in claim 1, wherein positive displacement drive allows rotation of cage ring (60) in the range of -95 ° to +95 ° for rotation banana shaped wind-turbine blade (110) adjoined with the mounting face (63).

22. The two planner self-aligning wind- turbine blade support mechanism as claimed in claim 1, wherein self-swivelling action of the swivel block (124) over follower block (121) arrangement allows cage (50) to move in the range of -2.16 ° to +2.16 ° in the transverse direction.

23. The two planner self-aligning wind- turbine blade support mechanism as claimed in claim 1, wherein self-swivelling action of the swivel bearing (131) allows cage (50) to move in the range of -2.16 ° to +2.16 ° in the longitudinal direction.

24. The two planner self-aligning wind-turbine blade support mechanism as claimed in claim 1, wherein method of attaching banana shaped wind-turbine blade (110) over self-swivelling turner mechanism (20) and second support (30) comprises the steps of:
a) positioning root face (111) of banana shaped wind-turbine blade (110) in contact with mounting face (63) of the cage ring (60) movably placed inside cage (50);
b) positioning tail end (113) of the banana shaped wind-turbine blade (110) in contact with pre-shaped clamps of the second support (30);
c) inserting bolts (250) into the bolt ways (66) of the mounting face (63) and bolt ways (112) of the root face (111) intermittently for micro-adjustment of attached banana shaped-wind turbine blade (110);
d) measuring parallelism between centre of gravity of the attached banana shaped wind-turbine blade (110) and axis of rotation of turner mechanism (20).

25. The two planner self-aligning wind- turbine blade support mechanism as claimed in claim 1, wherein a fail-safe brake (140) is configured with the overhanging motor assembly (70) to lock the rotational movement of the cage ring (60).

26. The two planner self-aligning wind- turbine blade support mechanism as claimed in claim 1, wherein fluid assisted brakes (150) attached with the cage (50) provides cushioned braking to stop the movement of cage ring (60).

27. The two planner self-aligning wind- turbine blade support mechanism as claimed in claim 1, wherein a safety curtain (230) attached between the railing (41) blocks the entrapment of operator in the working space (190).

28. The two planner self-aligning wind- turbine blade support mechanism as claimed in claim 1, wherein operations performed by two-planner support (10) is selected from machining, polishing, painting, inspection, and repair of the banana shaped wind-turbine blade (110).

29. The two planner self-aligning wind- turbine blade support mechanism as claimed in claim 1, wherein control unit (200) captures, processes, monitors and displays data for the swivel movement of cage (50), RPM of motor (70), peripheral speed of the cage ring (60), parallelism between axis of rotation of the turner mechanism (20) and second support (30), and angular position of the blade (110).

Dated this 6th Day of August, 2021.
, Description:FIELD OF INVENTION
The present invention relates to an arrangement for confining intricate aeromechanical parts at multiplicity of parallel planes. More specifically, the present invention relates to the field of tooling required for fabricating aeromechanical parts, wherein an arrangement accommodating composite geometry involves self-aligning means for constrained spatial movement of wind turbine blades, in general.
BACKGROUND OF THE INVENTION
In the domain of effectively harnessing kinetic energy contained in the free flowing wind for producing the mechanical power and other forms of useful energy, it relates to the field of aerodynamics chiefly involving use of intricate geometry and complex contour of the surfaces governing aerodynamic criteria of the blade and functional capacity of the equipment employing the said blade.
Further, the functional capacity of said wind-energy driven prime mover is directly proportional to the aerodynamic competency of the transitional means converting linear flow of wind into the rotational motion of the prime mover shaft, thereby the aerodynamic contours and geometrical configuration of the wind-turbine blade. Thus, for manipulating each force component of the flowing wind the blade communicating with said flowing wind requires correspondingly sophisticated surface flow paths for resolving independent force components, therefore the manufacturing process and the process equipment facilitating the process.
Other than contours of the wind-turbine blade another parameter influencing power generation capacity of wind-turbine arrangement is cross-sectional dimension of the circle swept by rotating blades ordinarily termed as the rotor diameter. The said parameter is alternatively defined as radial distance between centre of the wind-turbine shaft and outmost tip of the blade attached to the said rotating shaft. Further, the conventionally designed wind-turbine involves marginal flexibility to prevent abrupt deformation of said blades resulting due to drag and lift components of the wind forces.
The flexibility vested with the conventional wind-turbine blades makes the said blade capable to endure the wind forces for longer service life, but due to the deformation occurring due to the flexibility the length of the blade attached over the wind-turbine shaft decreases, leading to the corresponding decrease in the rotor diameter therefore power output of the involved wind-turbine arrangement. Whereas, to overcome the afore-stated decrease in the rotor diameter a pre-bend shape of the wind-turbine blade is employed involving bend in the opposite direction of the deformation occurring due to the wind forces, wherein the pre-bend shape of the said blade resembles contours of banana, thereby the blade containing such contours is regarded as a banana shaped blade.
In the case of banana shaped wind-turbine blade the centre of gravity of the blade remains offset to the central rotating axis, in certain scenarios the tip of the banana shaped wind-turbine blade shows mis-alignment in the range of 4 meters to 8 meters when computed from central axis of rotation; which in turn originates eccentric forces while handling and/or rotating the said blade required at the time of performing operations such as but not limited to machining, polishing, painting, inspection, and repair.
Properly assisted handling of wind-turbine blades having pre-bend banana shape is often found difficult phenomenon when firm securing of root face of the blade is aimed, due to the necessity of ongoing adjustment in fixturing system onto which root face is fastened originating because of the said contour of the wind-turbine blade; and to mitigate the said bottleneck the present invention is proposed, which provides means self-alignment for mounting surface carrying blade and having multiple degrees of freedom for facilitating the swivelling action mandated for the appropriate handling of the banana shaped wind-turbine blade.
Several technologies are set forth by different practitioners in the field of providing means for handling aeromechanical parts having rotational geometry, involving means such as belt drives, roller assisted motion transmission, and tail end driven configuration, in general for rotating wind-turbine blades, as annexed hereinafter; but, found incapable for providing a reliable device for providing metered motion, whole peripheral securement for proper fastening of root face, and handling specifically banana pre-bend shape of prolong wind-turbine blades.
Patent bearing No. WO2019195331A1, dated: 02/04/2018, discloses an arrangement for rotating wind-turbine blade having self-aligning means, and teaches use of an apparatus comprising a root device including: a base having an upper surface with a radius of curvature and configured to receive a root portion of a blade, with housings disposed on lateral sides of the base; wherein the housings includes a groove configured to receive a bearing and a shaft extending at least partially through the base and housing; further, a tip device is also provided which includes a base, a rotatable support frame having: a first support configured to receive a pressure side of a wind turbine blade, a second support configured to receive a suction side of a wind turbine blade, and an opening, the opening configured to receive a portion of a wind turbine blade.
Patent bearing No. DK2669508T3, dated 01/06/2012, discloses an apparatus for holding and rotating a wind-turbine blade, and teaches use of an arrangement wherein a blade holding apparatus holding one end of a wind turbine blade during handling, which blade holding apparatus includes a support structure including an opening for accommodating one end of the wind turbine blade, a clamping arrangement arranged in the opening, which clamping arrangement is realized to exert a clamping force on the wind turbine blade, and a locking arrangement for locking the clamping arrangement relative to the support structure; a method of operating such a blade holding apparatus during a handling procedure of a wind turbine blade is also provided.
Patent bearing No. EP2584191A1, dated 16/06/2010, discloses means for holding wind-turbine blade and teaches an arrangement wherein a circumferential structure that is seated on rotary rollers coupled to a base platform, the blade being seated on said circumferential structure and also on an end rotary support where the initial cylindrical portion of the blade rests; further, the circumferential structure comprises a structural ring attached to a central structure provided with a broad front opening, which houses a portion of the wind-turbine blade immobilised by means of jaws supported by the central structure, and are in turn arranged in correspondence with the sides of said front opening, which is demarcated by the edges thereof and by a movable arcuate body that forms part of the circumferential ring.
Patent bearing No. US9945351, dated 06/07/2012, discloses an arrangement for handling a wind turbine rotor blade, and teaches use of an apparatus for rotating and/or displacing a rotor blade of a wind power installation wherein the apparatus has at least one main body for at least partially embracing the rotor blade with a longitudinal, at least one contact portion for bearing against the rotor blade and at least one main frame for receiving the main body for rotation of the main body about the longitudinal axis and/or for displacement of the main body. The main body has at least one pivotably mounted pivotal portion for engagement at least one side of the rotor blade.
Patent document having No. WO2017131515, WO2012048719, US20140356113, WO2012163358, DE202016100449, and US9945351 teaches various arrangements for handling and rotating a wind turbine rotor blade; Patent document having No. US20130104376 and DK179300 teaches various arrangements for handling wind turbine tower section wherein bolting technique is employed.
However, such renowned technologies lacks in one or other aspect been addressed by the present invention, which includes provision of whole circumferential attachment of blade with turner mechanism, positive rotation of the blade through chain ring mounted on the periphery of the turner mechanism, vertical swivel means for allowing constrained motion along longitudinal axis of the blade, horizontal swivel means for allowing constrained motion along transverse axis of the blade, use of guiding plate for performing fixation of blade onto the turner mechanism at the time of bolting of blade through fasteners, additional roller support means for confining motion of the turner mechanism, multiple safety locks and provisional of automatic along with manual brakes for limiting the torsional stress and avoiding occurrence of accidents.
Thereby, the general purpose of the present invention is to provide an improved combination of convenience and utility, to include the advantages of the prior art, and to overcome the said drawbacks inherent therein.
SUMMARY OF THE PRESENT INVENTION
The principal object of the present invention is to provide means for attaching and rotating a wind-turbine blade (110), wherein root face (111) of the said wind-turbine blade (110) is adjoined with a turner mechanism (20) for imparting rotational motion, and tail-end is affixed with second support attachment (30).
Consistent with the precedent object, further object of the present invention is to provide means for attaching and rotating a wind-turbine blade (110), wherein geometrical intricacy associated with per-bend banana shape of wind-turbine blade can be can be compensated by the self-swivel motion of the turner mechanism (20).
Further object of the present invention is to provide an arrangement of chain ring (69) and sprocket ring (71) for positive rotation of the cage ring (60) carrying wind-turbine blade (110) fastened through bolts.
Another object of the present invention is to provide vertical swivel means (130) for facilitating constrained swivel movement of cage (50) about longitudinal axis of blade (110) as facilitated by the swivel bearing (131) and spring loaded limit studs (132).
Another object of the present invention is to provide horizontal swivel means (120) for facilitating constrained swivel movement of cage (50) about transverse axis of blade (110), as governed by the profile of the follower block (121).
Another object of the present invention is to provide provision of pneumatic/hydraulic operated brakes (150) for cushioned braking to the rotational movement of the cage ring (60), along with fail-safe brake (140) and mechanical limit block (67).
In one aspect of the present invention, a turner mechanism (20) assembly comprising a cage (50) affixed onto the base (40) is equipped with at least one electric motor (70) connected to the sprocket ring (71) through coupling (72), wherein said sprocket ring (71) is placed in conjunction with the chain ring (69) being attached onto the periphery of cage ring (60) for conveying rotational motion of the motor (70) into the rotational motion of the cage ring (60); whist plurality of guide rolls (90) and edge guides (100) functions to limit the extraneous deviation in the motion of cage ring (60).
In further aspect of the present invention, a wind-turbine blade (110) preferentially of pre-bend banana shape entailing a root face (111) and a tail end (113) portion is mounted over at least two support planes, wherein at first support plane a turner mechanism (20) is employed onto which said root face (111) of the blade (110) is fastened, and at the remainder plane a second support (30) having detachable face clamps is employed; further, mechanical power drawn from the motor (70) through sprocket ring (71) reaches to the chain ring (69) for actuation of cage ring (60) having blade (110) fastened using bolts to function as driving end, while the remotely placed second support (30) functions to support overhanging cantilever length of blade (110) and serves as a driven end.
In another aspect of the present invention, a horizontal swivel means (120) constituting one part of self-aligning the cage (50) having blade (110) affixed, wherein, for allowing oscillation of cage (50) along the transverse axis of blade (110) with reference to the base (40) a follower fixture (122) is affixed to the fixture housing (123) through fasteners; further, a follower block (121) is firmly secured with the follower fixture (122) and a swivel block (124) is movably connected to the follower block (121); in which, the said fixture block (121) being rigidly grounded with the fixture housing (123) is having a helical groove or projection (125) which communicates with the opposite profile of the swivel block (124) being rigidly connected with the cage (50) at left end (171) and right end (181); thereby, deviation in the orientation of cage (50) originating due to the profile of the blade (110) along the transverse axis of the blade (110) is accounted by the corresponding motion of the cage (50) within the operative range of the swivel block (124) and path prescribed by the follower profile (125) of the follower block (121).
In another aspect of the present invention, a vertical swivel means (130) constituting another part of self-aligning the cage (50) having blade (110) affixed, wherein, for allowing oscillation of cage (50) along the longitudinal axis of the blade (110) with reference to the base (40) a swivel bearing (131) competent to bear axial, transverse as well as thrust load is attached aside/inside to the swivel block (124); in which the said swivel bearing (131) is having one of the end extended up to the periphery and rotatably connected with the cage ring (60); further, to limit the over-oscillation of the said cage (50) beyond the limit and/or requirement of swivelling action, at least two spring loaded studs (132) are employed at the left support (170) and right support (180) of the cage (50), wherein the said spring loaded studs (132) functions as mechanical locators or limiting points to restrict the extraneous motion of the cage (50); thereby deviation in the orientation of the said cage (50) originating due to the profile of the blade (110) along the longitudinal axis of the blade (110) is accounted by the corresponding motion of the cage (50) within the operative range prescribed by the tuning of the spring loaded studs (132).
In the aspect of mounting the blade over two planner support (10) in the present invention involves procedural steps wherein blade lifting means/mechanism helps to carry the blade (110) to the turner mechanism (20) thereafter using the plurality of guide plate (80) attached over the bolt ways (112) of the blade (110) is made to communicate with guide slots (65) of the turner mechanism (60), for assuring firm positioning of bolt ways (112) of root face (111) with mounting face (63) of the turner mechanism (20) and executing bolting between the said blade (110) and mounting face (63) of turner mechanism (20); further, securing of tail end (113) is performed over second support (30) either prior, or simultaneously, or subsequent to the bolting of the root face (111).
BRIEF DESCRIPTION OF DRAWINGS
The advantages and features of the present aeration apparatus will become better understood with reference to the following more detailed description taken in conjunction with the accompanying drawings in which:
Fig. 1 illustrates perspective view of the turner mechanism (20);
Fig. 2 illustrates another perspective view of the turner mechanism (20);
Fig. 3 illustrates isometric view for front of the turner mechanism (20);
Fig. 4 illustrates isometric view for side of the turner mechanism (20);
Fig. 5 illustrates features of the chain ring (69), chain fixture (68), and limit block (67);
Fig. 6 illustrates features of the sprocket ring (71), motor (70), and coupling (72);
Fig. 7 illustrates separate view for features of the cage (50) with the cage guard (62);
Fig. 8 illustrates features of the edge guides (100) and guide rolls (90);
Fig. 9 illustrates placement of guide plate (80) with the guide slot (65) of the cage ring (60);
Fig. 10 illustrates attachment of blade (110) with the turner mechanism (20);
Fig. 11 illustrates feature of the horizontal swivel means (120);
Fig. 12 illustrates features of the follower block (121) of the horizontal swivel means (120);
Fig. 13 illustrates top view of turner mechanism (20) in un-swiveled condition;
Fig. 14 illustrates top view of the turner mechanism (20) in swiveled condition;
Fig. 15 illustrates features of the vertical swivel means (130);
Fig. 16 illustrates arrangement of spring loaded studs (132) with reference to the cage (50);
Fig. 17 illustrates side view of the turner mechanism (20) in swiveled condition;
Fig. 18 illustrates degree of freedom associated with turner mechanism (20);
Fig. 19 illustrates attachment of wind turbine blade (110) over two-planner support (10);
Fig. 20 illustrates various rotational orientations of the blade (20) placed over the two-planner arrangement (110);
Like reference numerals and names refer to like parts throughout the several views of the drawings
DETAILED DESCRIPTION OF THE INVENTION
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without these specific details.
Reference herein to “one embodiment” or “another embodiment” means that a particular feature, structure, or characteristics described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase “in one embodiment” in various places in a specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Further, the diagrams representing one or more embodiments of the invention do not inherently indicate any particular order nor imply any limitations in the invention.
As used herein, the term “plurality? refers to the presence of more than one of the referenced item and the terms “a”, “an”, and “at least” do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced item.
It should be emphasized that the term “comprises/comprising” when used in this specification is taken to specify the presence of stated features, integers, steps or components, but does not prelude the presence or addition of one or more other features, integers, steps, components or groups thereof.
The term ‘blade’ and ‘wind-turbine blade’ denoted by numeral ‘10’ is used interchangeably in the present disclosure and relates to essentially the same part of the disclosure, unless specified.
Fig. 1 to 20 shows the detailed features, along with relative connectivity and placements of the various elements essential for embodying the present invention, which proposes an apparatus for providing support to the various parts of the wind-turbine blade (110) across its length, and compatible to account for the self-swivel/self-alignment motion required at the multiplicity of non-intersecting planes for conformably attaining confined motion of the blade (110) over the said two-planner support (10) by means of turner mechanism (20); which majorly entails:
a cage (50) securing cage ring (60) fixed onto the base (40), a cage ring (60) having chain ring (69) wrapped around the periphery and placed in communication with the sprocket ring (71), plurality of motor assemblies (70) connected to sprocket ring (71) through coupling (72) for conveying rotational motion to the chain ring (60), plurality of guide rolls (90) placed adjacent to the cage ring (60), plurality of edge guides (100) placed in close contact with the non-mounting face (64) of the cage ring (60), an auxiliary bolt storage space (160) residing fastening bolts (250), plurality of guide slots (65) for accommodating guide plate (80) fixed with the blade (110), plurality of bolt ways (66) over the cage ring (60) coinciding with bolt ways (112) of root face (111) of the blade (110), a horizontal swivel means (120), a vertical swivel means (130), a fail-safe brake (140), plurality of pneumatic/hydraulic cylinders to function as pneumatic/hydraulic brake (150), a cage guard (62) enclosing cage ring (60), plurality of motion covers attached over several moving elements, railing (41) besides the cage (50), a safety curtain (230) positioned between the railings (41), a control system along with control panel (200), an electrical circuitry panel (not-shown); being accompanied by the second support (30) having pre-shaped clamps and rotation sensor.
Wherein, the term ‘root face’ (111) is defined by circular end of the wind turbine blade (110) having provision of attaching bolts for fastening with hub/driving assembly of wind turbine, in general.
Term ‘tail end’ (113) is defined as part of wind turbine blade (110) opposite to root face (111) having convergent cross-section, wherein ‘tail end’ in the subsequent disclosure denote presence of the tail part of wind turbine blade (110) having decreasing cross-section.
Term ‘two planner support’ (10) is defined as fixing/attachment of wind-turbine blade (110) over at least two parallel vertical planes across the length of the said blade (110).
Further, X axis, Y axis, and Z axis of movement with reference to the wind-turbine blade (110) is configured in accordance with Cartesian coordinate system, as illustrated in Fig. 1.
Term ‘degree of freedom’ is defined by count of transverse and rotational movements possible to execute by cage (50) of the turner mechanism (20) or by turner mechanism (20) itself, in the state where wind-turbine blade (110) is attached to the mounting face (63) of the cage ring (60).
Referring to the Fig. 1, 2, 3 & 4 several isometric and orthographic views of the turner mechanism (20) are illustrated, to depict overall arrangement of the turner mechanism (20), and placement and connectivity between various assemblies embodying the said turner mechanism (20).
Wherein, a base (40) grounded with the foundation and having cage (50) situated at its upper-part further entails plurality of railings (41) perimeter constructed above to the base (40), a working space (190) for the operator within the borders of the said railings (41), an electric circuit panel above to the base (40) adjacent to the railing (41), a control system along with control panel (200) in the vicinity of the said electric circuit panel, and a support structure (220) for reinforcement of the railing (41); according to one embodiment of the present invention.
Further, the cage (50) is a part affixed above to the base (40) adjacent to the working space (190) and encompasses plurality of motor assemblies (70) engaged with part of cage (50), plurality of guide rolls (90) and edge guides (100) housed onto the cage (50) for the communication with the non-mounting face (64) of the cage ring (60), and atleast two follower fixture (122) mounted over the cage (50); according to one embodiment of the present invention.
Referring to the Fig. 5 illustrating features of the chain ring (69), chain fixture (68), and limit block (67), and referring to the Fig. 6 illustrating features of the sprocket ring (71), motor (70), and coupling (72); whereby the elements constituting motion drive for actuating blade (110) mounted over the cage ring (60) through power conveyed by the motor (110) is depicted.
Wherein, ‘chain ring’ (69) is defined as a circular rack having links in place of gear tooth, and ‘sprocket ring’ (70) is defined as a set of thin pinion wheels, according to one embodiment of the present invention.
The chain ring (69) affixed peripherally to the cage ring (60) involves use of chain fixture (68) addressing incorporation of clamp-like fixturing arrangement having one part connected with the cage ring (60) and another placed in contact with the said chain ring (69); as delineated in the Fig. 5 a segment of the cage ring (60) periphery is kept uncovered by the said chain ring (69) and a strap-like arrangement is present therein. Said strap arrangement is regarded as a mechanical limit block (67) which caters to lock the rotational motion of the cage ring (60) in case of failure of the available brake facility present in the turner mechanism, according to one embodiment of the present invention.
While making reference to the Fig. 6, an arrangement prescribing use of coupling (72) is depicted, in which the said coupling (72) provides means for connecting the spindle of motor (70) carrying rotational motion with the axel (73) onto which sprocket ring (71) is mounted; wherein type of coupling (72) can be selected from flange coupling, flexible coupling, rigid coupling, sleeve coupling, or split-muff coupling.
For altering peripheral speed of chain ring (60) optionally an electrical control system is taken into use for varying speed of the electric motor (70), or a gear box having suitable gear speed ratio is to be adjoined with the axel (73) of the sprocket ring (71); according to one embodiment of the present invention.
Further, a pair of timing belt along with suitable pulleys, an arrangement of bull gear and pinion, or an arrangement involving circular rack and pinion can interchangeably employed in place of said chain ring (69) and sprocket ring (71) for facilitating substantially the same function without deviating actual scope of the present invention, according to one embodiment of the present invention.
Referring to the Fig. 7 illustrating features of the cage (50) with the cage guard (62), describes an arrangement wherein cage guard (62) functioning to cover the chain ring (60) is adjoined with the cage (50), and various recesses (51) residing guide rolls (90) and the edge guides (100) present over the cage (50) is revealed. Further, the fixture housing (123) placed both the side of the cage (50) is shown, which facilitates attachment of the follower fixture (122) and follower block (121), and provides passage to the extending shaft of the swivel bearing (131) for communication the cage (50); notably, the extended shaft of the swivel bearing (131) is either directly connected to the swivel block (124) as shown in Fig. 19, or having a motion convergence element placed therebetween; further the swivel block (124) can be a part having rotational geometry as shown in Fig. 18 or a square/rectangular block having plurality of sliding surfaces.
It is alternatively defined that, swivel block (124) located above to the left support (171) is connected with left end (171) of the cage (50), and another swivel block (124) located above to the right support (180) is connected with right end (181) of the cage (50).
Referring to the Fig. 8 illustrating features of the edge guide (100) and the guide rolls (90), describes connectivity and placement prevailing between both the mounting face (63) and non-mounting face (64) & the guide rolls (90) as further illustrated by Fig. 2.
The said guide rolls (90) placed in the intimate contact with the mounting face (63) and non-mounting face (64) of the cage ring (60) preferentially at multiple sites, having a part attached with the cage (50) and having a rotating member communication with said face being free to rotate, in turn provides a non-frictional characteristic for separating stationary [but self-aligning] cage (50) with the moving/rotating cage ring (60) along with limiting wobbling of cage ring (60) when made to swivel around longitudinal and/or transverse axis.
Further, the edge guide (100) detachably attached over the cage (50) through bracket arm (101) functions to provide an additional stability to the motion of the cage ring (60); wherein said edge guides (100) and guide rolls (90) are evenly spaced at pre-defined angular interval in the axis symmetrical manner, in which angular interval between two adjacent guide rolls are selected in the range of 20 ° to 60 °.
The said mounting face (63) is characterized by the surface to which the blade (110) is fastened as depicted in the Fig. 2; while the non-mounting face (64) is another surface of the cage ring (60) positioned opposite to the mounting face (63) in the working space (190).
Referring to the Fig. 9 illustrating placement of the guide plate (80) over the guide slot (65) of the cage ring (60); describes locating principle used for introducing means for fool-proofing/mistake-proofing/ poka-yoke in the method of fixing of the wind-turbine blade (110) over two-planner support (10).
The guide plate (80) having plurality of bolt-ways matching to the bolt-ways (66) of the mounting face (63) and the root face (111) further involves a locator placed in the vicinity of said bolt ways onto the side contacting the mounting face (63) of the cage ring (60), and a blade fin situated at the side contacting root face (111) of the blade (110). Wherein, the locator pin becomes inserted at the tapered groove contained by the guide slot (65) of the cage ring (60) in the state where said guide plate (80) is attached with the bolt ways (111) of the blade (110) and the said blade (110) is lifting over by the suitable lifting arrangements; thereby coincident-positioning of the bolt ways (65) of mounting face (63) with the bolt ways (112) of the root face (111) can be assured; embodying accurate mode of placement for the blade (110) according to one embodiment of the present invention.
Wherein, incorporation of the guide plate (80) in the procedure of fixturing blade (110) over turner mechanism (20) forms an essential part in order to forbidding erroneous conventional practise of trial-&-error for matching the bolt ways of the aforementioned faces and aligning overhanging blade parallel to the horizontal/flat datum so exercising fastening procedure. Additionally, lifting mechanism facilitating lifting of wind-turbine blade (110) mandated for placement of said blade over two-planner support (10) is selected from overhanging crane, fork lift, lifting trucks, conveyors, guided vehicles, etc.
Referring to the Fig. 10, an arrangement wherein root face (111) of the wind-turbine blade (110) is adjoined with the mounting surface (63) of the cage ring (60), and bolting is performed prior to fixing of the tail end (113) with second support (30), in the meantime of the fixing of the tail end (113) with second support (30), or subsequent to fixing of the tail end (113) with second support (30).
Wherein, at least two set of bolt ways involving multiple bolt ways in a single set is to be used at the mounting surface (63), while the bolting at the different bolt ways sets is to be performed intermittently; which implies after screwing certain number of bolts (250) into one bolt way set, bolting is to be executed at different bolt way set, instead of screwing all the possible bolt ways sites at once; and the cycle is to be continued till all the designated bolt ways sites are screws. The afore stated practice of sequencing the bolting order or performing bolting intermittently enables micro-adjustment phenomenon and avoids occurrence of stress-concentration at the said bolting sites.
Referring to the Fig. 3, which describes location and connectivity of the hydraulic/pneumatic brakes (150) with reference to the cage ring (60); wherein at least one and preferably two hydraulic/pneumatic cylinders are configured to communicate with outer periphery of the cage ring (60) to manipulate the peripheral velocity thereby rotational speed of the said cage ring (60).
Further, the hydraulic/pneumatic brake (150) is accompanied with the fail-safe brake (140) [depicted in Fig. 3] and functions to provide cushioned braking action. Wherein, role of hydraulic/pneumatic brake (150) varies from braking at low peripheral velocity of cage ring (60), sudden braking of the cage ring (60) at high peripheral speeds, or as an auxiliary brake in the inappropriate working condition of the fail-safe brake (140). Similarly, the said fail-safe brakes (140) are devoted serve for braking at low peripheral velocity of the cage ring (60), sudden braking of the cage ring (60) at high peripheral speeds, or auxiliary brake in the inappropriate working condition of the hydraulic/pneumatic brakes (150).
In context of the present invention, in the aspect of brakes hydraulic brakes and pneumatic brakes can interchangeably employed to facilitate cushioned braking action, thus, presence of hydraulic brakes and/or pneumatic brakes are termed as ‘fluid assisted brakes’ (150) without departing actual scope and spirit of the disclosed invention, according to one embodiment of the present invention. Further, the said fluid assisted brakes partly housed inside the cage (50) in turn communicates with mounting face (63) and non-mounting face (64) of cage ring (60) for imparting frictional force over the said faces in order to impede rotational motion of the said cage ring (60).
Referring to the Fig. 11 illustrating features of the horizontal swivel means (120) accountable for self-aligning motion of the cage ring (60) along the transverse axis of the blade (110), which comprises a follower fixture (122) mounted onto the fixture housing (123) for fixing of the follower block (121), a follower block (121) having a single helical projection or grove (125) for communication with swivel block (124), a swivel block (124) having an opposite profile with that of follower block (121) and connected with the cage (50) trough extended shaft of swivel bearing (131).
Referring to the Fig. 12, it shows detailed features of the follower block (121) and focuses on the projection or groove (125) having shape of a helix, being described as sinusoidal curve in the function of exponent, according to one embodiment of the present invention.
The contour of the projection or groove (125) of the follower block (121) is made such that, it permits a curvilinear motion of the cage (50), in which it is to be noted that helix made by the said projection or groove (125) can permit cage (50) to move either clockwise or counter-clockwise when observed from the top plane. Which implies, when observed from the top plane the motion of the cage (50) can be found to be marginally or substantially be in forward direction at one of the end of the cage (50) and in backward direction at another end of the cage (50), interchangeably, in accordance with the instantaneous rotational orientation of the blade (110) with reference to the cage (50).
For instance, horizontal swivel means (120) situated at one side of cage (50) is considered as left support (170) and another horizontal swivel means (120) placed opposite to the left support (170) is considered as right support (180), then in than case said cage (50) can execute swivelling/oscillating motion wherein:
cage (50) at the left support side (170) remain stationary and only right support side (180) follow either clockwise or counter-clockwise swivel movement, cage (50) at the right support side (180) remain stationary and only left support side (170) follow either clockwise or counter-clockwise swivel movement, cage (50) at left support (170) and at right support (180) follow clockwise swivel motion, cage (50) at left support (170) and at right support (180) follow counter-clockwise swivel motion, cage (50) at the left support side (170) follow clockwise swivel movement and right support side (180) follow counter-clockwise swivel movement, cage (50) at the left support side (170) follow counter-clockwise swivel movement and right support side (180) follow clockwise movement, or combination of thereof; according to one embodiment of the present invention.
Thus, the motion of the cage ring when observed from the top plane can be considered as bilateral, unilateral, hinged positive, hinged negative, and any combination resulting thereof, according to one of the illustrative embodiment of the present invention.
An instance wherein the left support (170) of the cage (50) and the right support (180) of the cage (50) remain in the un-swivelled orientation is depicted in the Fig. 13, while an instance wherein left support (170) and the right support (180) of the cage (50) is swivelled in the counter-clockwise direction is depicted in the Fig, 14.
Said Fig. 14 further depicts displacement of motor (70) when the cage (50) is subjected to swivelling motion in the direction transverse to the axis of blade (110), wherein sense of displacement of motor (70) is derived and in accordance with absolute movement of cage (50); which is facilitated by overhanging/cantilever arrangement of motor (70) above level of working space (190).
Referring to the Fig. 15 illustrating features of the vertical swivel means (130) accountable for self-aligning motion of the cage (50) along longitudinal axis of the blade (110), addressing the use of a swivel bearing (131) affixed aside/inside to the swivel block (124) with the fixture housing (123) [optionally swivel block itself], a shaft of the said bearing rotatably connected with the cage (50), and plurality of spring loaded limit studs (132) placed in the communication with the left support (170) of the cage (50) and right support (180) of the cage (50).
The swivel bearing (131) through its inherent bearing/rotating characteristics propounds un-restricted frictionless rotating [i.e. swivelling] motion to the cage (50) in the direction of longitudinal axis, while the spring loaded limit studs (132) provide cushioned restriction to the undesired movement that is extending the working span of the turner mechanism (20), thus said spring loaded studs (132) in turn functions as a spring assisted locator to confine rotational motion defining one of the degree of freedom of the turner mechanism (20), which can optionally be manually turned to in-&-out to account for the changing operational capacity of the turner mechanism (20).
Referring to the Fig. 16 one such arrangement of spring loaded limit studs (132) is depicted, wherein the said limit studs (132) are partly housed the structure located below to the fixture housing (123), and extended in such a manner that the remote ends of the each limit stud touches the surfaces of the cage (50) at the time of swivelling/oscillating motion of the cage (50) about longitudinal axis of the blade (110).
Notably, without deviating from the original mode of functioning of the said spring loaded limit studs (132), a cylindrical locator suspended with either compression or tension spring at either of its end can be employed, further instead of spring used in the foregoing disclosure a diaphragm member, a bellow device, an elastomeric material, hydraulic or electrically operated jacks, or any combination resulting therefrom, or any other means having elastic properties can be employed.
Similarly, the inclination/angle between limit stud (132) and the cage (50) can be selected from 25 °-55 °, 55 °-70 °, 70 °-85 °, 90 °, 95 °-110 °, 110 °-145 °, 145 °-165 °, any combination resulting from afore-stated ranges, or any other integer value resulting by sole or reptation of the 0 ° to 360 ° either in clockwise direction or counter-clockwise direction, according to one embodiment of the present invention.
Referring to Fig. 17 an instance wherein the cage (50) is swivelled along longitudinal direction is described, when compared with instance as depicted in Fig. 3 illustrating un-swivelled orientation of the cage (50). As evident from the Fig. 17 the cage (50) having blade (110) mounted with mounting face (63) is swivelled/oscillated with upper half of the cage (50) headed/falling downwards and lower half of the cage (50) reaching upwards, when compared with the orientation of the cage (50) of Fig. 3 being the result of swivelling action originated because of the profile of the banana shaped wind-turbine blade (110).
Further, the blade (110) being subjected to rotation through motioned conveyed by motor (70), the motion of the falling motion of upper part of the cage (50) and upward motion of the lower part of the cage (50) is considered to be cyclic; Therefore, the cage (50) resembles constrained wobbling motion, having maximum wobbling magnitude at the upper most portion of the upper half of the cage (50) and lower most portion of the lower half of the cage (50).
Wherein, swivelling motion of the cage (50) in directional transverse to the axis of the blade (110) is best visible in the top view of the turner mechanism (20) [refer to Fig. 15], swivelling motion of the cage (50) in the direction longitudinal to the axis of the blade (110) is best visible in the side view of the turner mechanism (20) [refer to Fig. 18]; while the combine swivelling motion in the said transverse and longitudinal axis results into the self-aligning action of the banana shaped wind-turbine blade (110) placed over two-planner support (10).
The term ‘horizontal swivel means’ (120) describes or relates to overall assembly or overall effect produced/generated due to the individual parts such as follower block (121), follower fixture (122), fixture housing (123), and swivel block (124), and referred as ‘horizontal swivel means’ (120) to denote assemblage of aforesaid parts. Whereas, the term ‘vertical swivel means’ (130) describes or relates to overall assembly or overall effect produced/generated due to combine functioning of swivel bearing (131) and spring loaded limit studs (132).
Referring to the Fig. 19 & 20 which describes utility of counterpart of the turner mechanism when employed as second support (30) for constituting two-planner support mechanism (10).
The arrangement of second support (10) as depicted in Fig. 19 & 20, wherein the curved clamps firmly grip at least one and preferably two surfaces of the wind-turbine blade (10), while the whole arrangement of second support (30) specifically function as a driven member, whose driving momentum is received from turner mechanism (20).
The clamps of said second support (30) are attached with the secure ring can be mechanically, pneumatically, or hydraulically actuated for imparting clamping force over attached blade (110); further, construction of said second support (30) can be interchangeably selected to having a friction less motion drive such as bearings, rollers, sleeves, pedestals etc. situated at either periphery, along the faces, or across the faces, with line contact, point contact, or roller contact for permitting required frictionless rotational motion of the clamps thereby the wind-turbine blade (110) attached to with the said claps; according to one embodiment of the present invention.
Further, the second support (30) is likely to be inclusive of locking mechanism in order to safe lock the position of the clamps at the time of holding the blade (30), another locking mechanism to optionally lock the rotational motion of the clamps, and a motion sensor attached onto at least one rotating part of the second support (30) for forming the closed-loop communication to fed process data to the controller unit (200) for compensating the errors and governing the optimal flow of overall operation.
Referring to the Fig. 19, it describes orientation of rotational axis and sense of rotation for the turner mechanism (20) when subjected to self-swivelling action, so as to determine the degree of freedom associated with the said turner mechanism (20).
As can be observed form the said Fig. 19 the combine arrangement of follower block (121), swivel block (124) and swivel bearing (131) enables clockwise and counter-clockwise rotational motion of the cage (50) in Y and Z directions, in the light of Cartesian coordinate system shown in the Fig. 1. Wherein, constrained rotational movement in the direction of Z axis facilitated by profile (125) of follower block (121), and constrained rotational movement in the direction of Y axis is facilitated by frictionless motion of the swivel bearing (131).
In conclusion, the turner mechanism (20) involves overall degree of freedom in X directional due to rotational motion of cage ring (60), in Y direction due to self-aligning motion of the swivel bearing (131), and in Z direction due to self-alignment motion provided by the swivel block (124) and follower block (121); and keeps the centre of gravity of the banana shaped wind-turbine blade (110) in line with centre of rotation of turner mechanism (20).
Referring to Fig. 19 illustrating attachment of wind-turbine blade (110) over two-planner support mechanism (10), and referring to Fig. 20 illustrating various rotational orientations of the blade (110) placed over the two-planner arrangement (10) describes various angular orientation of the wind-turbine blade (110) attached over two-planner support (10), according to one embodiment of the present invention.
The arrangement of two-planner support (10) is designed with consideration of lengthwise ideal distance between turner mechanism (20) and second support (30), height-wise ideal distance between ground and centre of rotation of the turner mechanism (20), ideal distance between ground and centre of rotation of second support (30), and minimum height-wise gap between ground and lowest surface of the blade (110), according to one embodiment of the present invention.
Wherein, in the Fig. 20 three separate angular orientation of the banana shaped wind-turbine blade (110) attached on the two-planner support (10) is shown having 0 ° angular position with reference to the turner mechanism (20) in first scenario, +92 ° angular position in the second scenario, and -92 ° angular position in third scenario. According to one of the illustrative embodiment of the present invention, the minimum and maximum values of height-wise difference between ground level [i.e. flat surface onto with turner mechanism is positioned] and the outermost vertices of the wind-turbine blade (110) in the first scenario can be considered as minimum of 440-485 mm and maximum of 1820-1865 mm, in case of second scenario the minimum distance would be in the range of 335-380 mm whereas maximum distance would be 2530-2575 mm, further in the third scenario minimum distance would be in the range of 470-510 mm and maximum being 540-565 mm; notably, the foregoing values of the height-wise differences are prescribes solely for illustration purpose which does not imply any construction limitation for producing subject matter disclosed in the present invention.
In a preferred scenario, the banana shaped wind-turbine blade (110) mounted over the two-planner support (10) and driven by the turner mechanism (20) will be allowed to rotate about the longitudinal axis [i.e. X axis] for the angle of 95 degrees in the clockwise direction and 95 degrees in the counter-clockwise direction, thus, in the total of 190 degrees; according to one embodiment of the present invention.
Further, the wind-turbine blade (110) attached onto the two-planner support (10) can execute rotational motion in clockwise direction or in counter-clockwise direction for the magnitude in the range of +30 ° to -30 °, +45 ° to -45 °, +60 ° to -60 °, +90 ° to -90 °, +120 ° to -120 °, +150 ° to -150 °, +180 ° to -180 °, or else, full 360 ° rotation, any combination resulting from afore-stated ranges, or any other integer value resulting by sole or reptation of the 0 ° to 360 ° rotational cycle, in the absence of the limit block (67) and the full peripheral/end-less arrangement of the chain ring (69); according to one of the illustrative embodiment of the present invention.
In another preferred scenario, the swivelling/oscillating/aligning action required to accommodate wobbling action originated by banana shape of wind-turbine blade (110) includes the use of -2.16 ° to +2.16 ° self-swivel/self-alignment movement for both vertical swivel means (130) and the horizontal swivel means (120); which implies the cage (50) would undergo up to 2 degree and 10 minutes of angular inclination in clockwise direction and in counter-clockwise direction, for vertical swivel means (130) and horizontal swivel means (120); according to one embodiment of the present invention.
Wherein, ideal application of the present invention consistent with foregoing embodiments includes operations such as but not limited to machining, polishing, painting, inspection, and repair of the banana shaped wind-turbine blades (10); according to one embodiment of the present invention.
In one of the functional advantages of the present invention, the fixing of the root face (111) of the blade (110) with the mounting face (63) of the turner mechanism (20) forbids involvement of the external surface of the blade (10) in the holding and/or rotating process, which avoids deterioration of the external surface of the said blade in order to reduce the rework rate; further, firm attachment/fastening of the blade (110) with turner mechanism (20) allows operator standing over the standing platform (191) proximally placed with the working space (190) to work into the interior of the blade (110) for performing required value adding processes; according to one embodiment of the present invention.
Consistent with the afore-stated scenario, whole circumferential securement of the wind-turbine blade (110) provides means to avoid slip-phenomenon and provides positive drive in the motion of the blade (110), in order to ensure secure operation and minimize the influence of torsional stresses acting over the blade (110) at the time of its rotational movement; according to one embodiment of the present invention. Wherein, whole circumferential attachment is alternatively termed as 360 ° securing of wind-turbine blade (110) with mounting face of turner mechanism (20).
For the purpose of safety against rotating parts of the turner mechanism (20) and second support (30), plurality of motion covers are incorporated at the parts executing rotational motion such as guide rolls (90), edge guides (100), cage ring (60) etc.; further, cylindrical barrier rods (240) are placed surround places such as but not limited to cage (50) and the cage ring (60) to prevent entrapment of human body parts are other tooling equipment; additionally, a safety curtain (230) is employed in the present invention at the working space (190), being extended between opposite railings (41) as shown in Fig. 13; according to one embodiment of the present invention.
An auxiliary bolt space (160) is provided besides the cage (50) to accommodate bolts (250) getting attached to the bolt ways (66, 112) of the mounting face (63) and the root face (111), in a manner that ergonomics of the bolting process can be optimized at reasonably superior level; further, a standing platform (191) is provided at the frontal part of the working space (190) as can be observed from the Fig. 2 & 3 to facilitate close inspection, or performing other value adding activities.
The preferable mode of functioning for present two-planner support (10) having self-aligning mechanism provided by the turner mechanism (20) includes steps of:
positioning root face (111) of the wind-turbine blade (110) in contact of mounting face (63) through coinciding guide plate (80) with guide slot (65), clamping the tail end (113) of the wind-turbine blade (110) with pre-shaped clamps of the second support (30), fastening the root face (111) with the mounting face (63) through inserting fasteners to the bolt ways (66), checking for the alignment before and/or in the meantime of tightening the fasteners, performing the value adding processes onto the blade (110), and capturing data for process variables and orientation of the blade (110); according to one embodiment of the present invention.
The control unit (200) employed in the present invention to governing operation of the two-planner blade support arrangement involves functioning part accountable for capturing, processing, monitoring, and displaying data from the sensors related to but not limited amount of swivel/oscillating action/movement that cage (50) has undergone at instance of time and throughout the operational time for certain blade geometry, RPM of motor and peripheral speed of the cage ring (60), parallelism between the axis of rotation of the turner mechanism (20) and the second support (30), alignment of the blade (110) at the time of mounting over the two-planner support (10), angular position of the blade (110), operational conditions of the fail-safe brake (140) and pneumatic/hydraulic brake (150), and additional sensors for measuring the value added processes performed on the blade (110) when mounted between the two-planner support (10); according to one embodiment of the present invention.
Wherein, monitoring of the process data and orientation of the blade (110) can either be displayed to the remote location through wired or wireless medium, or to the control panel positioned besides the control unit (200).
Additionally, Pitch Circle Diameter [PCD] for the bolt ways (66) of the mounting face (63) can be altered to accommodate various size of the blades (110) having different Pitch Circle Diameter at root face (111); thereby working span/capacity of the turner mechanism (20) can be widespread to account for the diverse constructional needs for the two-planner wind-turbine support mechanism (10) without making substantial modifications in the turner mechanism, according to one of the embodiments of the present invention.
Although a particular exemplary embodiment of the invention has been disclosed in detail for illustrative purposes, it will be recognized to those skilled in the art that variations or modifications of the disclosed invention, including the rearrangement in the configurations of the parts, changes in steps and their sequences may be possible. Accordingly, the invention is intended to embrace all such alternatives, modifications and variations as may fall within the spirit and scope of the present invention.
The foregoing descriptions of specific embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching.