Claims:1. Transportation cum storage device for stator core and winding assembly of the turbo-generator comprising a base structure (100) supporting a load transferring structure (200) mounted with the stator core and winding assembly (400), wherein the transportation cum storage device is accommodated inside a housing (500), in which the base structure (100) and load transferring structure (200) include stiffening plates.
2. The transportation cum storage device for stator core and winding assembly as claimed in claim 1, wherein the base structure is substantially having ladder like structure comprising of side rails (100A) connected by means of multiple middle members (100B) there between forming a single structure, wherein the middle members(100B) are disposed parallel to each other.
3. The transportation cum storage device for stator core and winding assembly as claimed in claim 1 or 2, wherein the side rail (100A) includes two channels (101,102) fixedly secured to top and bottom plates (103,104) constituting a tubular member accommodating a stiffening plate (105) and clips (106).
4. The transportation cum storage device for stator core and winding assembly as claimed in claims 1-3, wherein the stiffening plate (105) and channel (102) are provided with a plurality of holes, which are placed in alignment for passage of lifting lug (107), in which the channels (101,102) and clips (106) are substantially having C-section, wherein said stiffening plate (105) is provided for supporting the lifting lug (107) and said clip (106) is provided for receiving the lifting lug (107).
5. The transportation cum storage device for stator core and winding assembly as claimed in claims 1-4, wherein Said middle member comprises of two channels (101,102) fixedly secured to top and bottom plates (103,104) forming a tubular member.
6. The transportation cum storage device for stator core and winding assembly as claimed in claims 1-5, wherein the Load transferring structure (200) is made of multitude of stiffeners arranged in a unique way to support and take the load of stator core and winding assembly and also to provide good rigidity and stiffness to the load transferring structure.
7. The transportation cum storage device for stator core and winding assembly as claimed in claims 1-6, wherein the Load transferring structure (200) includes a pair of vertical (201) and a pair of horizontal (202) stiffeners, in which Said pair of horizontal (202) stiffeners are located on the middle members (100B) and said pair of vertical (201) stiffeners are positioned on the side rails (100A) facing each other.
8. The transportation cum storage device for stator core and winding assembly as claimed in claims 1-7, wherein the vertical stiffener (201) includes two parallel plates accommodating at least two T-section plates (T1) i.e. two plates mounted perpendicular to each other.
9. The transportation cum storage device for stator core and winding assembly as claimed in claims 1-8, wherein the horizontal stiffener (202) includes the T-section plates mounted on a plate forming a base (T2), which is covered from three sides with the help of plate like members, in which the base is disposed at an angle so as to be intact with the circumference of the stator core and winding assembly.
10. The transportation cum storage device for stator core and winding assembly as claimed in claims 1-9, wherein push fitting two pipes (301) form part of the axial locking mechanism for locking said stator core and winding assembly (400) to said load transferring structure (200), in which the push fitting two pipes (301), one on each side of core suspension ear plates (302) of the assembly (400) are provided in order to withstand axial accelerations or jerks encountered during transportation.
11. The transportation cum storage device for stator core and winding assembly as claimed in claims 1-10, wherein the housing (500) constituting a box like construction comprises of multitude of plates (501) for covering the base structure (100) from bottom, a rectilinear structure (502) supporting a top cover (503) having substantially semi circular section so as to provide coverage to the underlying stator core and winding assembly (400) maintaining required clearance, wherein the rectilinear structure (502) is secured with atleast four C- channels (504), two on each side acting as a protective member so as to avoid crushing during lifting of stator core and winding assembly. , Description:FIELD OF THE INVENTION
[001] This invention relates to transportation cum storage device for stator core and winding assembly of the turbo-generator. The device is compact, which can be employed for lifting, transporting and storing purposes. It can take jerks in all the 3-directions experienced by the transport vehicle during transportation. The device is designed by optimizing it’s size and weight and ease of manufacturing by using welding and bolted joints for use in handling of large turbo-generators.
BACKGROUND/PRIOR ART OF THE INVENTION
[002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[003] The stator core & winding assembly is a combination of core, copper bars, winding and output lead connections. Core is built from thin laminations in to packets separated by vent spacers and are clamped together by clamping plates bolts. The bars are the individual entities, which are placed in the slots of the stator core and finally connected to each other as per a pre-designed scheme. The bars are uniformly distributed on the circumference of the stator core. Output leads & connections are taken out from the exciter end of stator and supported by connecting rings. Hence, weight of the core assembly is very high for large turbo-generator.
[004] Normally core assembly is transported along with the stator frame. But in such cases when core & winding assembly is made at one place and is to be transported to another location, it is very important to transport it very safely and in some cases where core assembly is taken as a spare, storage provisions has to be made.
[005] In order to cater to the above requirements. a compact transportation cum storage device is required to be devised.
[006] Now, reference may be made to the following prior art.
[007] US8533933B2: A method for manufacturing and preparing for assembly a stator core of a generator, the stator core having a central cylindrical bore along a longitudinal axis of the stator core, the method including in a first step, mounting a first press plate onto a tooling device and concomitantly and/or subsequently positioning at least one key bar to be manufactured in an axial direction with respect to the longitudinal axis in a spaced manner along a peripheral circumference of the first press plate. The method includes in a second step, stacking a plurality of generator laminations onto the first press plate and mechanically coupling the plurality of generator laminations with the at least one key bar and, in a third step, mounting a second press plate onto the plurality of generator laminations, fixing the second press plate to at least one of the at least one key bar and at least one axial fixing device and concomitantly and/or subsequently exerting axial stress on the first and the second press plates.
[008] This prior art talks about introducing a tube into inner diameter of the stator core during transport. The tube takes over the supportive function of the stator core assembly during transportation. However, this prior art does not talk about storage of the core at customer site.
[009] Thus, none of the above can fulfill the requirements of the present invention for which it is designed. Hence, the present invention has been proposed.
OBJECTS OF THE INVENTION
[010] An object of the present invention is to provide transportation cum storage device for stator core and winding assembly of the turbo-generator, which is compact.
[011] Another object of the present invention is to provide transportation cum storage device for stator core and winding assembly of the turbo-generator which uses less raw material in an optimum configuration.
[012] Still another object of the present invention is to provide a transportation cum storage device for stator core and winding assembly of the turbo-generator which can be manufactured cost effectively.
[013] Another object is to provide a means of storage at customer site when stator core and winding assembly is taken as a spare.
[014] A still another object is optimum utilization of the space at the customer site when it is stored for future use.
[015] These and other objects and advantages of the present invention will be apparent to those skilled in the art after a consideration of the following detailed description taken in conjunction with the accompanying drawings in which a preferred form of the present invention is illustrated.
SUMMARY OF THE INVENTION
[016] One or more drawbacks of conventional systems and process are overcome, and additional advantages are provided through the apparatus and a method as claimed in the present disclosure. Additional features and advantages are realized through the technicalities of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered to be part of the claimed disclosure.
[017] According to this invention, there is provided transportation cum storage device for stator core and winding assembly of the turbo-generator comprising a base structure supporting a load transferring structure mounted with the stator core and winding assembly, wherein the transportation cum storage device is accommodated inside a housing, in which the base structure and load transferring structure include stiffening plates.
[018] The base structure is substantially having ladder like structure comprising of side rails connected by means of multiple middle members there between forming a single structure, wherein the middle members are disposed parallel to each other.
[019] The side rail includes two channels fixedly secured to top and bottom plates constituting a tubular member accommodating a stiffening plate and clips.
[020] A plurality of holes, which are placed in alignment for passage of lifting lug, in which the channels and clips are substantially having C-section, wherein said stiffening plate is provided for supporting the lifting lug and said clip is provided for receiving the lifting lug.
[021] Said middle member comprises of two channels fixedly secured to top and bottom plates forming a tubular member.
[022] The Load transferring structure is made of multitude of stiffeners arranged in a unique way to support and take the load of stator core and winding assembly and also to provide good rigidity and stiffness to the load transferring structure.
[023] The Load transferring structure includes a pair of vertical and a pair of horizontal stiffeners, in which Said pair of horizontal stiffeners are located on the middle members and said pair of vertical stiffeners are positioned on the side rails facing each other.
[024] The vertical stiffener includes two parallel plates accommodating at least two T-section plates i.e. two plates mounted perpendicular to each other.
[025] The horizontal stiffener includes the T-section plates mounted on a plate forming a base, which is covered from three sides with the help of plate like members, in which the base is disposed at an angle so as to be intact with the circumference of the stator core and winding assembly.
[026] Push fitting two pipes form part of the axial locking mechanism for locking said stator core and winding assembly to said load transferring structure, which the push fitting two pipe, one on each side of core suspension ear plates of the assembly are provided in order to withstand axial accelerations or jerks encountered during transportation.
[027] The housing constituting a box like construction comprises of multitude of plates for covering the base structure from bottom, a rectilinear structure supporting a top cover having substantially semi circular section so as to provide coverage to the underlying stator core and winding assembly maintaining required clearance, wherein the rectilinear structure is secured with atleast four C- channels, two on each side acting as a protective member so as to avoid crushing during lifting of stator core and winding assembly.
[028] Various objects, features, aspects, and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.
[029] It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined to form a further embodiment of the disclosure.
[030] The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING
[031] The illustrated embodiments of the subject matter will be best understood by reference to the drawings, wherein like parts are designated by like numerals throughout. The following description is intended only by way of example, and simply illustrates certain selected embodiments of devices, systems, and processes that are consistent with the subject matter as claimed herein, wherein: -
Fig. 1shows: Exploded view of a transportation cum storage device for stator core and winding assembly of the turbo-generator of the present invention.
Fig. 2 shows: Base structure according to present invention.
Fig. 2A shows: Exploded view of side rail of the base structure of invention.
Fig. 2B shows: Exploded view of the middle members of the base structure of present invention.
Fig. 3 shows: Load transferring structure in accordance with present invention.
Fig. 3A shows: Stator core and winding assembly mounted on load transferring structure according to present invention.
Fig. 4 shows: Locking mechanism of present invention.
Fig. 5 shows: Mounted stator core and winding assembly locked to load transferring structure according to present invention.
Fig. 6 shows: Housing to provide coverage to present invention.
[032] The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAIL DESCRIPTION OF THE PRESENT INVENTION WITH REFERENCE TO THE ACCOMPANYING DRAWINGS OF PREFERRED EMBODIMENTS
[033] While the embodiments of the disclosure are subject to various modifications and alternative forms, specific embodiment thereof have been shown by way of example in the figures and will be described below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure.
[034] This invention relates to an invention pertaining to technology regarding transportation cum storage device for stator core and winding assembly of the turbo-generator. For the same reference may be made to fig. 1 indicating exploded view for clear understanding. The device of the present invention includes the following:
- Base structure (100)
- Load transferring structure (200)
- Locking means (300) for locking stator core and winding assembly (400) to load transferring structure (200)
- Housing (500) for whole assembly of base structure and load transferring structure together with stator core and winding assembly.
Base structure (100)
[035] The base structure is best seen in the figure 2, which is substantially having ladder like structure comprising of side rails(100A) connected by means of multiple middle members(100B) there between forming a single structure, wherein the middle members are disposed parallel to each other.
[036] The side rail (100A) is shown in the figure 2A. This includes two channels (101,102) fixedly secured to top and bottom plates (103,104) constituting a tubular member. The tubular member thus formed accommodates a stiffening plate (105) and clips (106). The stiffening plate (105) and channel (102) are provided with a plurality of holes, which are placed in alignment for passage of lifting lug (107) as shown. The channels (101,102) and clips (106) are substantially having C-section. Here, said stiffening plate (105) is provided for improving rigidity and supporting the lifting lug (107) and said clip (106) is provided for receiving the lifting lug (107).
[037] Both the side rails (100A) are having same construction. For the middle members (100B), reference may be made to Fig 2B. Said middle member comprises of two channels (101,102) fixedly secured to top and bottom plates (103,104) forming a tubular member.
Load transferring structure (200)
[038] Referring to Fig 3, wherein the Load transferring structure (200) is made of multitude of stiffeners arranged in a unique way to support and take the load of stator core and winding assembly and also to provide good rigidity and stiffness to the load transferring structure. Further, referring to Fig 3A illustrating mounting of stator core and winding assembly on the load transferring structure (200).
[039] The Load transferring structure (200) as in Figure. 3 includes a pair of vertical (201) and a pair of horizontal (202) stiffeners. Said pair of horizontal (202) stiffeners are located on the middle members (100B) and said pair of vertical (201) stiffeners are positioned on the side rails (100A) facing each other. The vertical stiffener (201) includes two parallel plates accommodating atleast two T-section plates (T1) i.e. two plates mounted perpendicular to each other.
[040] The horizontal stiffener (202) includes the T-section plates mounted on a plate forming a base (T2), which is covered from three sides with the help of plate like members. The base is disposed at an angle so as to be intact with the circumference of the stator core and winding assembly. This helps in load transfer of the stator core and winding assembly uniformly.
Locking means (300) for locking stator core and winding assembly to load transferring structure (200)
[041] The locking stator core and winding assembly (400) (Fig 4.) is locked to the load transferring structure (200) thereunder as shown in Fig 4. Now, reference may be made to Fig 3A and 4, in which push fitting two pipes (301), one on each side of core suspension ear plates (302) are provided in order to withstand axial accelerations or jerks encountered during transportation.
[042] The push fitting two pipes (301) form part of the axial locking mechanism for locking said stator core and winding assembly (400) to said load transferring structure (200).
Housing (500)
[043] Referring to Fig 1 and 6, wherein the housing (500) constituting a box like construction comprises of multitude of plates (501) for covering the base structure (100) from bottom. Further, the housing includes a rectilinear structure (502) supporting a top cover (503). The top cover (503) is having substantially semicircular section so as to provide coverage to the underlying stator core and winding assembly (400) maintaining required clearance.
[044] The aforesaid housing (500) covers the entire mounted assembly of the present invention from all sides, thereby protecting the same from surrounding air and water. This results in safe storage of the assembly of invention.
[045] In conjunction with the above, the rectilinear structure (502) of the housing (500) is secured with atleast four C- channels (504), two on each side. Here, the C-channel acts as a protective member so as to avoid crushing during lifting of stator core and winding assembly.
[046] According to another aspect of the present invention, there is provided a method for manufacturing of compact storage cum transportation frame assembly for stator core and winding assembly of a generator. The method comprising the following steps:
a. Preparation of base structure with C-channels welded together in a ladder configuration along with stiffener plates with lateral C-channels welded exactly below the core suspension rings of the stator core and winding assembly and machining circular openings for welding the lifting lugs at 4 locations;
b. Preparation of the load transferring structure by welding rectangular plates in a unique manner to enhance the stiffness and rigidity of the support;
c. Welding the above mentioned base structure and load transferring structure;
d. Mounting core and winding assembly on the load transferring structure and locking by means of rectangular pipes using push fit for axial locking of the core and winding assembly;
e. Welding of the covers for storage purposes;
f. Welding of C-channels on the cover to avoid crushing of the container during lifting.
[047] In present Invention stator core & winding assembly is supported and transported by means of base structure with welded C-channels and plates, load transferring structure with unique stiffener arrangement and a push fit of Pipes at the core suspension ring ear plates. The device of the present invention is made in such a way that it can withstand jerks encountered during transportation in all directions. The device also has provisions for lifting/handling arrangements and can be used for storing stator core &winding assembly at customer site.
[048] Each of the appended claims defines a separate invention, which for infringement purposes is recognized as including equivalents to the various elements or limitations specified in the claims. Depending on the context, all references below to the "invention" may in some cases refer to certain specific embodiments only. In other cases, it will be recognized that references to the "invention" will refer to subject matter recited in one or more, but not necessarily all, of the claims.
[049] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all groups used in the appended claims.
[050] It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particulars claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogues to “at least one of A, B and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances where a convention analogous to “at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B”.
[051] The above description does not provide specific details of manufacture or design of the various components. Those of skill in the art are familiar with such details, and unless departures from those techniques are set out, techniques, known, related art or later developed designs and materials should be employed. Those in the art are capable of choosing suitable manufacturing and design details.
[052] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. It will be appreciated that several of the above-disclosed and other features and functions, or alternatives thereof, may be combined into other systems or applications. Various presently unforeseen or unanticipated alternatives, modifications, variations, or improvements therein may subsequently be made by those skilled in the art without departing from the scope of the present disclosure as encompassed by the following claims.
[053] The claims, as originally presented and as they may be amended, encompass variations, alternatives, modifications, improvements, equivalents, and substantial equivalents of the embodiments and teachings disclosed herein, including those that are presently unforeseen or unappreciated, and that, for example, may arise from applicants/patentees and others.
[054] While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.