FIELD OF THE INVENTION
The present invention relates to a device for safe transporting of bladed turbine rotor.
BACKGROUND OF THE INVENTION
Steam turbine extracts thermal energy from pressurized steam and uses it to do mechanical work on a rotating output shaft to drive an electrical generator for generating electricity.
In a typical larger power stations, the steam turbines are split into three separate stages, the first stage being the High Pressure (HP), the second stage the intermediate Pressure (IP) and the third the Low Pressure (LP) stage where high, intermediate and low describe the pressure of the steam. The High Pressure (HP) turbine module is the first turbine to receive steam from the main steam system, while Low Pressure (LP) turbine module is the last. The turbine in between the HP and LP is an intermediate Pressure (IP) Turbine module. These turbines are designed to efficiently extract work out of high pressure of the steam as steam passes through all the modules and

converts thermal energy (high pressure and high temperature) of working fluid in to mechanical energy (as shown in Fig. 1).
It is a general practice to transport the small to medium size turbine, from manufacturing unit, in assembled state. Whereas, with the increase in power rating of steam turbines, the size and weight of the steam turbines has increased. Such method of transportation, that is in assembled condition as per prior art, is not possible for higher rating steam turbines. Hence, it was made necessary to send turbines to site in disassembled state in such a way that the most critical component of the turbine, a bladed rotor, is sent separately.
Also, when a bladed turbine rotor is transported, it has been a usual practice to support the bladed rotor through the journal/resting area and therefore firmly place the bladed rotor on a support framework made by wooden or iron material. Such method of transportation in the prior art has a disadvantage in that it is not applicable to transportation of turbines having rotors of heavy weight, such as IP or LP turbine, since the rotor of the turbine is supported through journal on one end and resting area on other, therefore, with the result that the portions of the journal which is brought into contact with transportation support are in danger of suffering damage due to vibrations occurring during transportation. Therefore, the bladed rotor

which can be actually transported in an assembled condition by the prior art method are by far smaller in weight and smaller in bulk than those being able to be transported by means of a trailer or a freight car.
With the proposed transportation fixture, it will be possible for transporting higher rating bladed Rotor, corresponding to IP Turbine, to construction sites on a transportation trailer.
OBJECTS OF THE INVENTION
It is an object of the invention to propose a device for safe transporting of bladed turbine rotor.
A further object of the invention is to propose a device for safe transporting of bladed turbine rotor, in which the height and width of the packaged cargo containing the bladed turbine rotor is optimized by installing slanted I-beams for better stability and rigidity.
Another object of the invention is to propose a device for safe transporting of bladed turbine rotor, in which seating arrangement of the Bladed rotor is provided considering lifting plans of the cargo.

SUMMARY OF THE INVENTION
The present invention is contemplated with a view for improving the aforementioned disadvantage of the prior art. To this end, the present invention provides a rotor holding device for turbines in which damages to the contact portions of the journals and the turbine rotor blades are avoided and a bladed turbine rotor of larger size than those which have hitherto been handled by the prior art method can be transported in an assembled condition.
According to the present invention, there is provided a device for holding bladed rotor which can be detachably mounted on a trailer or a freight car so as to fixedly support the bladed rotor during transportation, and can be removed after completion of transportation. According to the present invention, there is also provided means for preventing the rotor from axially moving in the rotor housing during transportation.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
It is to be noted, however, that the appended drawings illustrate only typical embodiments of the present subject matter and are therefore not to be

considered for limiting of its scope, for the invention may admit to other equally effective embodiments. The detailed description is described with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the figures to reference like features and components. Some embodiments of system or methods in accordance with embodiments of the present subject matter are now described, by way of example, and with reference to the accompanying figures, in which:
Figure 1 illustrates the cross sectional view of the high rating steam turbine.
Figure 2 illustrates the front view of package with Bladed rotor placed inside.
Figure 3 illustrates the top view of package with Bladed rotor placed inside.
Figure 4 illustrates the Section A-A of figure 3
Figure 5 illustrates the view M as shown in Figure 2
Figure 6 illustrates the side view of package with Bladed rotor placed inside.
Figure 7 illustrates the structural frame.

Figure 8 illustrates the various members of the structural frame. Figure 9 illustrates the bladed IP Rotor.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The subject matter disclosed herein relates to method and means, through a device for safe road transportation of bladed turbine rotor.
According to an implementation of the present subject matter, a novel package is specifically designed to meet the transportation demands of the bladed turbine rotor based upon its size and weight.
The device comprises of following members:
- a structural frame (1) for bladed rotor
- Top cover (2) to cover the fixture from top
- Stud (3) to vertical locking of wooden blocks as shown in View N
- Nut (4) to tighten the studs from top
- Washer (5) to be placed below Nut (4) for better fastening
- Stud (6) for horizontal locking of wooden blocks with structure.

- Bolt (7) and Nut (8) to fasten the cover(2) with the structural frame(1)
- Plurality of : Wooden Beam (10), Wooden Beam (11), Wooden Beam (12), Wooden Beam (13), Wooden Beam (14) of different sizes
- Rubber Sheet (15) Placed between resting portion and wooden beam (11, 12, 13) to avoid any damage to resting area/journal area.
- Nails (16) used for fixing wood pieces with metallic pieces
- Transverse Channel (17) in structural frame(1)
- Longitudinal beam (18) in structural frame (1)
- Mild steel channel size 200mm x 75mm (19) used in longitudinal beam (17) & transverse beam (18)
- Plates (20)
- Plurality of Vertical column (21) of the structural frame (1)
- Plurality of I - beam (22) to transfer the vertical load of the bladed rotor to base structure
- Plurality of I - beam (23) to transfer the transportation axial loading of bladed rotor to base structure due to acceleration and de acceleration of trailer.
- Plurality of Stiffener(24) for improving the local rigidity of structure
- Sheet cover (25) around the transportation fixture
- Angle (26) welded along the base structure (23)
- Bladed Rotor( 27)
- Plurality of Channel (28) for supporting the wooden beams 10,11,12

It should be noted that the description and figures merely illustrate the principles of the present subject matter. It should be appreciated by those skilled in the art that conception and specific embodiment disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present subject matter. It should also be appreciated by those skilled in the art that by devising various arrangements that, although not explicitly described or shown herein, embody the principles of the present subject matter and are included within its spirit and scope. Furthermore, all examples recited herein are principally intended expressly to be for pedagogical purposes to aid the reader in understanding the principles of the present subject matter and the concepts contributed by the inventor(s) to furthering the art, and are to be construed as being without limitation to such specifically recited examples and conditions. The novel features which are believed to be characteristic of the present subject matter, both as to its organization and method of operation, together with further objects and advantages will be better understood from the following description when considered in connection with the accompanying figures.

The base of the structural frame (1) is manufactured from transverse channel (17) and longitudinal fabricated beams (18). Each longitudinal beams (18) in turn are manufactured by using plurality of mild steel channel (19) of required web height joined together by plates (20) of suitable thickness in equally spaced location. Transverse beams (17) are manufactured using mild steel channel (19). The length (L) of the transverse and length (L’) of the longitudinal beam is to be fixed in a way to accommodate the bladed Rotor (27) in the transportation fixture.
Vertical columns (21) of the structural frame (1) are manufactured using Mild steel Channel (19) of suitable web height (200mm) and are placed facing opposite to each other. At a suitable height from ground, a transverse channel (28) is placed and locked at the position. The load of assembled bladed rotor (27) is being transferred at these plurality of channel (28) and further transferred through the plurality of I Beams (22) to base structure (formed by Transverse and longitudinal beam). Angle (26) is welded all along the base of structural frame (1) to support the metallic sheet cover (25) around the transportation fixture. The Horizontal/axial loading during transportation of bladed rotor is transferred/countered by using I Beams (23).

Figure 7 and 8 shows the above explained various members of the structural frame.
The structural frame (1) of the package has been analyzed, for various loading using FE analysis Software, prior to its industrial use.
Transport packages are generally subjected to two types of loads i.e. Lifting loads and Transportation loads. Fine balance has to be adjusted between strength and flexibility keeping overall cost down. Local stiffeners (24) are provided at the location of weld joints where additional strengthening is required to maintain joint integrity. However it is tricky to align and position these stiffeners to maximize the impact and still maintain the accessibility during manufacturing.
The top cover (2) of the transportation fixture is fabricated using carbon steel sheet. The size of the cover is designed considering the basic requirement of covering the structural frame (1) from top. The top cover (2) is designed in an arc (A) design considering the maximum blade diameters in order to accommodate the blades of the rotor (27).
Wooden beams (10, 11, 12) are placed over the transverse channel (28). The wooden beams (10, 11) are provided with a curvature to complete the

circle made by wooden beams. Wooden Beam (11) is made in two parts with a radius profile at ends to complete the circumscribing area over the resting area. All the beams (10, 11, 12) when placed in its location on both sides forms a complete circle so that the bladed rotor resting area can be placed in between them.
The rotor is placed inside the transportation device after placing the wooden beam (12) in the desired location. A Rubber sheet (15) of suitable thickness is placed between the wooden beams (11, 12, and 13) and bladed rotor Journal (27). The rubber sheet 15 prevents scratches, dents to the precise machining on the journal portion. Any damage to the journal area can result into adverse effects on the turbine operation.
Once the bladed Rotor is placed inside the transportation fixture on the wooden pieces, wooden beam (11 and 10) are placed and locked using plurality of Studs (3), Nut (4) and washers (5). These fasteners are used to lock the location of journal with the structural frame to avoid any vertical movement of the bladed rotor during transportation.
Plurality of Bolt (6), Nut (4) and Washer (5) are used to fasten the wooden beams (10, 11, 12) with the vertical columns (21). These fasteners avoid any movement of the wooden beams during loaded condition.

Plurality of Bolt (7), Nut (8) and washer (9) are used to fasten the cover (2) with the structural frame (1).
Wooden Beams (13, 14) are fixed under the base of the structural frame to avoid any damage to the transportation fixture due to water logging and unevenness of the floor in the stores before, during and after transportation. The wooden beams (13, 14) avoid direct contact of the Structural frame with the ground.
Although embodiments for the present subject matter have been described in language specific to package features, it is to be understood that the present subject matter is not necessarily limited to the specific features described. Rather, the specific features and methods are disclosed as embodiments for the present subject matter. Numerous modifications and adaptations of the system/device of the present invention will be apparent to those skilled in the art, and thus it is intended by the appended claims to cover all such modifications and adaptations which fall within the scope of the present subject matter.
From the foregoing description, it will be appreciated that the device according to the present invention is provided independently of bearings for

a turbine rotor, so that there is no possibility of the bearings and turbine rotor being damaged due to the contact thereof during transportation, thereby making it possible to transport a larger sized turbine rotor than can be by the prior art method in an assembled condition. Therefore, according to the present invention, it is possible to assemble turbines of a large size in a well-equipped plant, thereby contributing to improving the quality of turbines.

WE CLAIM
1. A device for safe transporting of bladed turbine rotor, comprising:
- a structural frame (1) for the bladed rotor manufactured from transverse and longitudinal fabricated beams;
- a top cover (2) designed in an arc shape considering the maximum blade diameters of the Bladed rotor and internally supported by angles;
- a plurality of wooden beams (10, 11, 12) placed over the transverse channel and placed at a height higher than that of the base frame and having a circular or partly circular curvature to match the rotor journal diameter;
- wherein said wooden Beams (13 and 14) are fixed under the base frame of the device to avoid direct contact of the device from the excessive vibrations due to unevenness of the road; and
- a Rubber Sheet (15) placed between the journal portion and the wooden beam to avoid any damage to journal.

2. The device as claimed in claim 1, wherein a plurality of strengthening beams (23) to provide rigidity in axial direction as well as to transfer load in a vertical direction, is provided.
3. The device as claimed in claim 1 or 2, wherein a plurality of stiffener (24) for strengthening the structure frame in transverse direction is provided.
4. The device as claimed in claim 1, wherein the longitudinal fabricated frames are manufactured by using a plurality of mild steel channel joined together by equally spaced plates of thickness corresponding to web height of the channels.
5. The device as claimed in claim 1, wherein the fabricated transverse
beams are manufactured using a multiple steel channel of equal web
height.