WO2023137590A1

WO2023137590A1 - Rolling device for inner casing part of gas turbine

Info

Publication number: WO2023137590A1
Application number: PCT/CN2022/072589
Authority: WO
Inventors: Gangyi LI; Le ZHANG; Christian ANDERT
Original assignee: Siemens Energy Global GmbH & Co. KG; Siemens Energy Co., Ltd.
Priority date: 2022-01-18
Filing date: 2022-01-18
Publication date: 2023-07-27

Abstract

The present invention provides a rolling device for an inner casing part of a gas turbine, the gas turbine comprising an inner casing part and an outer casing part, and the rolling device being configured to roll the inner casing part relative to the outer casing part. The rolling device comprises: a support frame, the support frame having a bracket and a roller assembly, the bracket being configured to be rigidly connected to the outer casing part, and in an installation position of the support frame, the roller assembly is installed on a top of the bracket; and a rolling ring, the rolling ring having a ring body and a cradle installed on an inner side of the ring body, an outer surface of the ring body being adapted to match with a rolling surface of the roller assembly to enable the rolling ring to rotate on the support frame, and the cradle being configured to support and fix the inner casing part of the gas turbine. The rolling device provided by the present invention is easy to operate, and the time needed to maintain the gas turbine is shortened remarkably.

Description

Rolling Device for Inner Casing Part of Gas Turbine

Technical Field

The present invention relates to a rolling device for an inner casing part of a gas turbine. In particular, the present invention relates to a rolling device for rolling a lower portion of a Compressor Exit Diffuser (CED) of the gas turbine.

Background

In a maintenance process of the gas turbine, if it is necessary to remove the CED from the gas turbine, in the gas turbine of a previous type, it is necessary to lift the CED together with a rotor. When the rotor is lifted, maintenance work leads to interruption of operation on a large scale.

In a novel gas turbine, the CED is designed with two separate portions: an upper portion and a lower portion. The upper portion may be lifted directly, and there are still many difficulties in related operation of the lower portion.

Summary

In order to solve the above problem, the present invention provides a rolling device for an inner casing part of a gas turbine to turnover, i.e. roll, the inner casing part relative to the outer casing part. The inner casing part is, for example, a lower portion of the CED (CED LP for short) , such that the inner casing part can roll in a simple and safe manner, and therefore, the time needed to maintain the gas turbine is shortened remarkably.

According to an aspect of the present invention, provided is a rolling device for an inner casing part of a gas turbine, the gas turbine comprising an inner casing part and an outer casing part, and the rolling device being configured to roll the inner casing part relative to the outer casing part. In particular, the rolling device comprises: a support frame, the support frame having a bracket and a roller assembly, the bracket being configured to be rigidly connected to the outer casing part, and in an installation position of the support frame, the roller assembly is installed on a top of the bracket; and a rolling ring, also can be called a rotating ring, the rolling ring having a ring body and a cradle installed on an inner side of the ring body, an outer surface of the ring body being adapted to match with a rolling surface of the roller assembly to enable the rolling ring to rotate on the support frame, and the cradle being configured to support and fix the inner casing part of the gas turbine.

In an exemplary implementation, the rolling device further comprises a driving assembly, the driving assembly being configured to drive the rolling ring to rotate around a center axis of the rolling ring so as to provide a driving force for the rolling of inner casing part relative to the outer casing part.

In an exemplary implementation, the driving assembly is a pulley mechanism, the pulley mechanism comprising: a pulley frame being fixedly installed on the outer casing part, located outside the rolling ring, and spaced from the rolling ring by a distance; a fixed pulley being installed on the pulley frame; and a rope, the rope passing around the fixed pulley, one end of the rope being adapted to be connected to a hook of a crane, and the other end of the rope being connected to the inner casing part or the rolling ring to pull the inner casing part and the rolling ring to rotate together.

In an exemplary implementation, the rolling device further comprises a protecting means, the protecting means being configured to prevent sudden rapid rolling due to out-of-control of the inner casing part.

In an exemplary implementation, a part of the bracket of the support frame is provided as an arc-shaped sliding surface, the shape of the sliding surface being suitable for sliding on an arc-shaped matching surface provided on the outer casing part or suitable for sliding on an arc-shaped matching surface of a supporting part provided on the outer casing part, such that in a process of installing the support frame, the support frame enters the installation position in a sliding manner.

In an exemplary implementation, the bracket of the support frame comprises: a plurality of columns; a plurality of bases respectively located at the bottom end of each of the columns, the bases being adapted to be fixedly mounted to the outer casing part; a plurality of cross beams being fixedly connected to the columns; and a plurality of connecting beams being fixedly connected to the columns and the cross beams; wherein the bracket is provided with four roller assemblies.

In an exemplary implementation, the ring body of the rolling ring comprises a first ring and a second ring same in shape, the first ring and the second ring are provided in parallel along a same center line, a plurality of cross bars are connected between the first ring and the second ring, the number of the cradles is two, and the two cradles are symmetrically provided relative to a longitudinal median plane of the ring body; wherein an outer diameter surface of the first ring is matched with the rolling surfaces of the two roller assemblies of the four roller assemblies, and an outer diameter surface of the second ring is matched with the other two roller assemblies of the four roller assemblies.

In an exemplary implementation, the rolling ring comprises a first half ring and a second half ring, the first half ring and the second half ring are connected to each other at joints, and the cradles are provided at the joints.

In an exemplary implementation, the cradle comprises: an installation seat that is fixedly installed at the joint and is provided with an installation plane; and a support wall that extends perpendicularly from the installation plane, the support wall extending in a radial plane of the rolling ring.

In an exemplary implementation, the rolling assembly comprises: a roller outer seat, the roller outer seat being fixedly installed on a top of the bracket; a roller inner seat fixedly embedded into the roller outer seat, and the roller inner seat being formed with a groove, wherein a height of the roller inner seat relative to the roller outer seat is adjustable; a roller shaft fixedly provided in the roller inner seat, two ends of the roller shaft being configured to pass through two opposite side walls of the roller inner seat; and a roller located in the groove and rotatably mounted on the roller shaft.

By way of the above arrangement of the rolling device for the inner casing part of the gas turbine of the present invention, a duration needed to roll the inner casing part of the gas turbine can be shortened, a maintenance operation may be simplified, the safety of operation is improved, and the maintenance cost of the gas turbine is lowered remarkably.

Brief Description of the Drawings

Detailed description of the preferred embodiments of the present invention will be made below with reference to drawings, and those skilled in the art can understand the abovementioned and other features and advantages of the present invention. In the drawings,

Fig. 1 is a perspective schematic diagram of a rolling device for an inner casing part of a gas turbine according to an exemplary implementation of the present invention.

Fig. 2 is a perspective schematic diagram of a rolling device according to an exemplary implementation of the present invention in an operating process.

Fig. 3A and Fig. 3B are perspective schematic diagrams of a support frame of a rolling device according to an exemplary implementation of the present invention.

Fig. 3C is a perspective schematic diagram of a roller assembly of a support frame of a rolling device according to an exemplary implementation of the present invention.

Fig. 3D and Fig. 3E are perspective schematic diagrams of a bracket of a support frame of a rolling device according to an exemplary implementation of the present invention.

Fig. 4 is a partial perspective schematic diagram of a rolling device according to an exemplary implementation of the present invention in an operating state.

Fig. 5 is a perspective schematic diagram of a rolling ring of a rolling device according to an exemplary implementation of the present invention and an inner casing assembly of a gas turbine, which are assembled together.

Fig. 6 is a perspective schematic diagram of a rolling ring of a rolling device according to an exemplary implementation of the present invention.

Fig. 7 is a perspective schematic diagram of a first half ring of a rolling ring of a rolling device according to an exemplary implementation of the present invention.

Fig. 8 is a perspective schematic diagram of a second half ring of a rolling ring of a rolling device according to an exemplary implementation of the present invention.

Fig. 9A, Fig. 9B, Fig. 9C and Fig. 9D are views of a working process of a rolling device according to an exemplary implementation of the present invention.

Fig. 10A and Fig. 10B are perspective schematic diagrams of an installing process of a support frame of a rolling device according to an exemplary implementation of the present invention.

Fig. 11 is a perspective schematic diagram of a support frame of a rolling device according to another exemplary implementation of the present invention.

Fig. 12 is a perspective schematic diagram of the support frame in Fig. 11.

Fig. 13 is a schematic front sectional view of the support frame in the Fig. 11.

Reference numerals are illustrated as follows.

1 Support frame

11 Bracket

111 Sliding surface

112 Column

113 Base

1131 Bottom surface

114 Cross beam

116 Connecting beam

12 Roller assembly

12’ Roller assembly

121 Roller outer seat

122’ Central bearing member

1221 Upper surface

1222 Lower surface

1223 Side surface

124 Roller inner seat

125 Groove

121’ Roller seat

1211 First side wall

1212 Second side wall

122 Roller shaft

123 Roller

123’ Roller

2 Rolling ring

21 Ring body

211 First ring

212 Second ring

22 Cradle

221 Installation seat

222 Support wall

223 Reinforcing wall

23 Cross bar

24 First half ring

25 Second half ring

26 Joint

3 Pulley mechanism

31 Pulley frame

32 Fixed pulley

33 Rope

34 Connecting member

35 Hook

4 Protecting means

5 Auxiliary rack

6 Round through hole

8 Inner casing part

9 Outer casing part

Detailed Description of the Embodiments

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described in detail below in combination with examples.

First, referring to Fig. 1 and Fig. 2, a rolling device for an inner casing part of a gas turbine according to an exemplary implementation of the present invention is described in detail. Those skilled in the art shall understand that the gas turbine includes an inner casing part 8 and an outer casing part 9 (referring to Fig. 2) . In the embodiment, the inner casing part 8 is, for example, a lower portion of the CED (CED LP for short) . Certainly, in other application situations, the inner casing part may be a lower portion of a compressor stationary vane carrier ring (CVC) or a lower portion of a turbine stationary vane carrier ring (TVC) . These inner casing parts may be rolled during a maintenance period by applying the rolling device of the present invention.

Referring to Fig. 2, in the maintenance process of the gas turbine, it is necessary to roll the inner casing part 8 relative to the outer casing part 9, and generally, the inner casing part 8 is rolled at 180 degrees. The rolling device of the present invention is configured to roll the inner casing part 8 relative to the outer casing part 9.

Referring to Fig. 1, the rolling device mainly includes a support frame 1 and a rolling ring 2. In Fig. 1, there are two support frames 1, each of the support frames 1 is provided with a bracket 11 and a roller assembly 12, the bracket 11 is configured to be rigidly connected to the outer casing part 9, and in an installation position of the support frame 1, the roller assembly 12 is installed on a top of the bracket 11. The rolling ring 2 is provided with a ring body 21 and two cradles 22 installed on an inner side of the ring body 21, an outer surface of the ring body 21 is adapted to match with a rolling surface of the roller assembly 12 to enable the rolling ring 2 to rotate on the support frame 1, and the cradle 22 being configured to support and fix the inner casing part 8 of the gas turbine. In Fig. 1 and Fig. 2, auxiliary racks 5 are further illustrated, the auxiliary racks 5 are adapted to be fixedly installed in a round through hole 6 of the outer casing part 9, and the auxiliary rack 5 may be of a triangular structure (referring to Fig. 4) . It may be seen from Fig. 1 that the auxiliary rack 5 is configured to support the support frame 1. It is to be understood that in a specific application situation of the rolling device of the present invention, one or more auxiliary racks may be provided according to a specific requirement, and it is apparent that the structure of the auxiliary rack may be changed properly.

Still referring to Fig. 1, the rolling device may further includes a driving assembly, for example a pulley mechanism 3, the driving assembly being configured to drive the rolling ring 2 to rotate around a center axis of the rolling ring 2 so as to provide a driving force for the rolling of inner casing part 8 relative to the outer casing part 9. The pulley mechanism comprises: a pulley frame 31, being fixedly installed on the outer casing part 9, located outside the rolling ring 2, and spaced from the rolling ring 2 by a distance; a fixed pulley 32 being installed on the pulley frame 31; and a rope 33, the rope 33 passing around the fixed pulley 32, one end of the rope 33 being adapted to be connected to a hook 35 of a crane, as an optional solution, one end of the rope 33 being connected to the hook 35 of the crane via a connecting member 34, and the other end of the rope 33 being connected to the inner casing part 8 or the rolling ring 2 to pull the inner casing part 8 and the rolling ring 2 to rotate together. Fig. 1 merely schematically illustrates a part of the rope 33.

Still referring to Fig. 1, the rolling device further includes a protecting means 4. Specifically, the protecting means is, for example, two ratchet hoists that are symmetrically provided relative to a longitudinal median plane of the rolling ring 2. One tail end of a chain of each of the ratchet hoists is connected to the rolling ring 2 and/or the inner casing part 8, and the tail end moves in a single direction along with rotation of the rolling ring 2 to prevent reverse movement. The ratchet hoist is a known mechanism which can play a role of safety protection. For example, when the rope 33 is broken, the ratchet hoists can prevent the rolling ring 2 and the inner casing part 8 and the like from injuring a body of an operator due to the rolling ring 2 and the inner casing part 8 and the like move reversely. Certainly, those of ordinary skill in the art may envisage protecting means of other types, as long as the first end of the protecting means is fixedly provided relative to the outer casing part 9, a second end opposite to the first end of the protecting means is connected to the rolling ring 2 and/or the inner casing part 8, and the second end is adapted to move in a single direction along with rotation of the rolling ring 2 to prevent reverse movement.

Referring to Fig. 3B and Fig. 3E, a part of the bracket 11 of the support frame 1 is provided as the arc-shaped sliding surface 111, the shape of the sliding surface is suitable for sliding on an arc-shaped matching surface provided on the outer casing part 9 or is suitable for sliding on an arc-shaped matching surface of a supporting part provided on the outer casing part 9, such that in a process of installing the support frame 1, the support frame 1 enters the installation position in a sliding manner. It is to be understood that a specific arranging position of the sliding surface 111 of the bracket 11 of the support frame 1 may be adaptively designed according to a specific situation applying the support frame 1.

As the support frame 1 is quite heavy, it is difficult to insert and install the support frame beneath the CED because a crane can not be used beneath the CED. However, the sliding surface 111 of the support frame 11 is designed such that the support frame 1 may slide from a side of the CED. Then, the crane can be used and the support frame 1 can slide beneath the CED, such that the support frame 1 can be assembled to a proper position of the outer casing part 9, which facilitates the installing process of the support frame 1, thereby alleviating the workload of an operator and improving the installing speed of the support frame 1 remarkably.

Description of a specific structure of an exemplary implementation of the support frame 1 is made below with reference to Fig. 3A and Fig. 3B. The bracket 11 of the support frame 1 includes two columns 112; two bases 113, respectively located at the bottom ends of the two columns 112 and the bases are fixedly installed to proper positions of the outer casing part 9 directly or via one or more auxiliary racks and the like; a plurality of cross beams 114, fixedly connected to the columns 112; and a plurality of inclined connecting beams 116, fixedly connected to both the columns 112 and the cross beams 114. In an installation position of the support frame 1, the top of the bracket 11 is formed with a quadrilateral structure and is provided with four roller assemblies 12, and the four roller assemblies 12 are respectively provided at positions of four corners of the quadrilateral structure. The first side of the bracket 11 is formed with a quadrilateral structure, the second side and the third side of the bracket 11 opposite to each other are formed as triangular structures, and the fourth side opposite to the first side of the bracket is provided with the arc-shaped sliding surface 111. The support frame 1 is robust and stable in structure.

Referring to Fig. 10A and Fig. 10B, a process of installing the support frame 1 in a sliding manner is illustrated. The crane may be used to place the support frame 1 on a side of the inner casing part 8, and then the support frame 1 slides beneath the inner casing part 8. The bottom surface 1131 of the base 113 of the bracket 11 of the support frame 1 of the present invention may be suitable for sliding to the installation position along the inner circumferential surface of the outer casing part 9. Fig. 10 illustrates a state of the support frame 1 before sliding, and Fig. 10B illustrates a state of the support frame 1 in a proper position after sliding. As an optional solution, the height of the base may be adjustable, for example, the height can be adjusted via a height adjustment bolt, such that the bottom surface 1131 of the base 113 can be better adaptive to the corresponding surface of the outer casing part 9.

Description of an exemplary implementation of the rolling ring 2 is made below with reference to Fig. 6 to Fig. 8. Referring to Fig. 6, the ring body 21 of the rolling ring 2 includes a first ring 211 and a second ring 212 same in shape, the first ring 211 and the second ring 212 are provided in parallel along a same center line, a plurality of cross bars 23 are connected between the first ring 211 and the second ring 212, the number of the cradles 22 is two, and the two cradles 22 are symmetrically provided relative to a longitudinal median plane of the ring body 21. An outer diameter surface of the first ring 211 is matched with rolling surfaces of the two roller assemblies of the four roller assemblies 12, and an outer diameter surface of the second ring 212 is matched with the other two roller assemblies of the four roller assemblies 12.

Referring to Fig. 7 and Fig. 8, the rolling ring 2 includes the first half ring 24 and the second half ring 25, and both the first half ring 24 and the second half ring 25 are in half-ring shapes extending at 180 degrees. The first half ring 24 and the second half ring 25 are connected with each other via bolts at the joint 26, and the cradles 22 are provided at the joints 26. The rolling ring 2 is designed as two half rings: the upper first half ring 24 and the lower second half ring 25, such that the rolling ring 2 can be assembled to the top and bottom of the CED, and then the outer diameter surface of rolling ring 2 can be used as a rolling surface. The rolling ring 2 is simple in structure and convenient to assemble and roll.

Referring to Fig. 6, the cradle 22 includes: an installation seat 221 fixedly installed at the joint 26 and provided with an installation plane; a support wall 222 that extends perpendicularly from the installation plane, the support wall 222 extending in the radial plane of the rolling ring 2 and the support wall 222 in the Fig. 6 being in the horizontal direction; and one or more reinforcing walls 223 that extend perpendicularly from the installation seat 221, the reinforcing walls 223 being perpendicularly connected to the support wall 222.

Referring to Fig. 3C, the roller assembly 12 of the first implementation is described. The rolling assembly 12 includes: a roller outer seat 121, the roller outer seat 121 being fixedly installed on a top of the bracket 11; a roller inner seat 124 fixedly embedded into the roller outer seat 121, and the roller inner seat 124 being formed with a groove 125, wherein a height of the roller inner seat 124 relative to the roller outer seat 121 is adjustable; a roller shaft 122 fixedly provided in the roller inner seat 124, two ends of the roller shaft 122 passing through two opposite side walls of the roller inner seat 124; and a roller 123 located in the groove 125 and rotatably installed on the roller shaft 122. In a feasible implementation, a height adjustment bolt (not shown) is provided between the roller inner seat 124 and the roller outer seat 121 to adjust the height of the roller inner seat 124 relative to the roller outer seat 121, in other words, to adjust the distance between the roller inner seat 124 and the roller outer seat 121.

In the description and drawings of the application, the geometrical shapes of the various parts are merely used to describe a new rolling concept. As long as a basic function is provided, details of the geometrical shape of the roller assembly may be changed. The roller assembly 12 shown in Fig. 3C is merely an example, roller assemblies of other types may further be applied, and Fig. 11 to Fig. 13 show the roller assembly 12’ of a second implementation. The roller assembly 12’ includes a roller seat 121’, the roller seat 121’ being fixedly installed on the top of the bracket 11, the roller seat 121’ being provided with a first side wall 1211 and a second side wall 1212 that are provided oppositely, and the first side wall 1211 and the second side wall 1212 being parallel to each other and isolated at a certain distance to form an installation space between the first side wall 1211 and the second side wall 1212; a central bearing member 122’, a peripheral surface of the central bearing member 122’ including a horizontal upper surface 1221, a horizontal lower surface 1222 and two oppositely provided arc-shaped side surfaces 1223 connecting the upper surface and the lower surface, the central bearing member 122’ being fixedly provided in the roller seat 121’, and two ends of the central bearing member 122’ passing through the first side wall 1211 and the second side wall 1212; and a plurality of rollers 123’ provided between the first side wall 1211 and the second side wall 1212 and around the whole peripheral surface of the central bearing member 122’, the plurality of rollers 123’ being configured to roll around the central bearing member 122’ in a known manner; it is to be understood that the rolling manner of the plurality of rollers 123’ is similar to a movement manner of a caterpillar band.

According to an implementation in the drawings of the present invention, the inner casing part 8 is the lower portion of the CED, the inner casing part 8 can roll out relative to the rotor by means of the rolling device of the present invention, and roll about 180 degrees usually. If the inner casing part 8 can be rolled out, the whole maintenance work can be shortened by about 4 days since it is unnecessary to lift the rotor, which brings about a technical effect superior to the prior art obviously.

The concept of the present invention is not only applicable for separated CED, but also applicable for any other inner casing parts with enough spaces to assemble the rolling device. However, for a large gas turbine, the rolling device is particularly suitable for the rolling of the lower portion of the CED since there may be no enough spaces beneath some other inner casing parts to assemble the support frame.

In an existing solution, in order to roll the inner casing part of the gas turbine, it may be necessary to form a machined round surface on the inner casing part. However, by means of the rolling device for an inner casing part of the gas turbine of the present invention, the rolling ring forms a whole circle, consisting of the upper and lower half rings. Therefore, it is unnecessary to form a machined round surface on the inner casing part to realize the rolling function. Thus, from this aspect, the solution of the present invention has remarkable benefits.

Referring to Fig. 9A to Fig. 9D, brief description of the working process of the rolling device for an inner casing part of a gas turbine of the present invention is made. After all parts of the support frame 1, the rolling ring 2 and the pulley mechanism 3 are assembled together, a rolling process of the inner casing part 8 may be started. The hook 35 of the crane or some hoists of other types provide a driving force to rotate the rolling ring 2 and the inner casing part 8 together. In Fig. 9A, an initial rolling stage is illustrated. In Fig. 9B, rotation of the rolling ring 2 and the inner casing part 8 together at about 90 degrees. In Fig. 9C, rotation of the rolling ring 2 and the inner casing part 8 together at about 135 degrees. In Fig. 9D, rotation of the rolling ring 2 and the inner casing part 8 together at about 180 degrees.

The above mentioned is merely the preferred embodiments of the present invention and is not used to limit the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be regarded as within the protection scope of the present invention.

Claims

A rolling device for an inner casing part of a gas turbine, the gas turbine comprising an inner casing part (8) and an outer casing part (9) , the rolling device being configured to roll the inner casing part (8) relative to the outer casing part (9) , characterized in that the rolling device comprises:

a support frame (1) , the support frame (1) having a bracket (11) and a roller assembly (12) , the bracket (11) being configured to be rigidly connected to the outer casing part (9) , and in an installation position of the support frame (1) , the roller assembly (12) is installed on a top of the bracket (11) ; and

a rolling ring (2) , the rolling ring (2) having a ring body (21) and a cradle (22) installed on an inner side of the ring body (21) , an outer surface of the ring body (21) being adapted to match with a rolling surface of the roller assembly (12) to enable the rolling ring (2) to rotate on the support frame (1) , and the cradle (22) being configured to support and fix the inner casing part (8) of the gas turbine.
The rolling device for an inner casing part of a gas turbine according to claim 1, characterized in that the rolling device further comprises a driving assembly, the driving assembly being configured to drive the rolling ring (2) to rotate around a center axis of the rolling ring (2) so as to provide a driving force for the rolling of inner casing part (8) relative to the outer casing part (9) .
The rolling device for an inner casing part of a gas turbine according to claim 2, characterized in that the driving assembly is a pulley mechanism (3) , the pulley mechanism (3) comprising: a pulley frame (31) being fixedly installed on the outer casing part (9) , located outside the rolling ring (2) , and spaced from the rolling ring (2) by a distance; a fixed pulley (32) being installed on the pulley frame (31) ; and a rope (33) , the rope (33) passing around the fixed pulley (32) , one end of the rope (33) being adapted to be connected to a hook (35) of a crane, and the other end of the rope (33) being connected to the inner casing part (8) or the rolling ring (2) to pull the inner casing part (8) and the rolling ring (2) to rotate together.
The rolling device for an inner casing part of a gas turbine according to claim 1, characterized in that the rolling device further comprises a protecting means (4) , the protecting means being configured to prevent sudden rapid rolling due to out-of-control of the inner casing part (8) .
The rolling device for an inner casing part of a gas turbine according to any one of claims 1-4, characterized in that a part of the bracket (11) of the support frame (1) is provided as an arc-shaped sliding surface (111) , the shape of the sliding surface being suitable for sliding on an arc-shaped matching surface provided on the outer casing part (9) or suitable for sliding on an arc-shaped matching surface of a supporting part provided on the outer casing part (9) , such that in a process of installing the support frame (1) , the support frame (1) enters the installation position in a sliding manner.
The rolling device for an inner casing part of a gas turbine according to claim 5, characterized in that the bracket (11) of the support frame (1) comprises: a plurality of columns (112) ; a plurality of bases (113) respectively located at the bottom end of each of the columns (112) , the bases (113) being adapted to be fixedly mounted to the outer casing part (9) ; a plurality of cross beams (114) being fixedly connected to the columns (112) ; and a plurality of connecting beams (116) being fixedly connected to the columns (112) and the cross beams (114) ; wherein the bracket (11) is provided with four roller assemblies (12) .
The rolling device for an inner casing part of a gas turbine according to claim 6, characterized in that:

the ring body (21) of the rolling ring (2) comprises a first ring (211) and a second ring (212) same in shape, the first ring (211) and the second ring (212) are provided in parallel along a same center line, a plurality of cross bars (23) are connected between the first ring (211) and the second ring (212) , the number of the cradles (22) is two, and the two cradles (22) are symmetrically provided relative to a longitudinal median plane of the ring body (21) ;

wherein an outer diameter surface of the first ring (211) is matched with the rolling surfaces of the two roller assemblies of the four roller assemblies (12) , and an outer diameter surface of the second ring (212) is matched with the other two roller assemblies of the four roller assemblies (12) .
The rolling device for an inner casing part of a gas turbine according to claim 7, characterized in that the rolling ring (2) comprises a first half ring (24) and a second half ring (25) , the first half ring (24) and the second half ring (25) are connected to each other at joints (26) , and the cradles (22) are provided at the joints (26) .
The rolling device for an inner casing part of a gas turbine according to claim 8, characterized in that the cradle (22) comprises:

an installation seat (221) that is fixedly installed at the joint (26) and is provided with an installation plane; and

a support wall (222) that extends perpendicularly from the installation plane, the support wall (222) extending in a radial plane of the rolling ring (2) .
The rolling device for an inner casing part of a gas turbine according to any one of claims 1-4, characterized in that the rolling assembly (12) comprises:

a roller outer seat (121) , the roller outer seat (121) being fixedly installed on a top of the bracket (11) ;

a roller inner seat (124) fixedly embedded into the roller outer seat (121) , and the roller inner seat (124) being formed with a groove (125) , wherein a height of the roller inner seat (124) relative to the roller outer seat (121) is adjustable;

a roller shaft (122) fixedly provided in the roller inner seat (124) , two ends of the roller shaft (122) being configured to pass through two opposite side walls of the roller inner seat (124) ; and

a roller (123) located in the groove (125) and rotatably mounted on the roller shaft (122) .