Positioning structure for steam turbine rotor maintenance

Abstract

The invention relates to the technical field of steam turbine rotors, in particular to a steam turbine rotor maintenance positioning structure which comprises a first base and a second base, lifting boxes are arranged above the first base and the second base respectively, and a sliding locking unit matched with the second base is installed on the first base. The tops of the first base and the second base are fixedly connected with a plurality of first hydraulic telescopic rods correspondingly, the telescopic ends of the first hydraulic telescopic rods are fixedly connected with the corresponding lifting boxes, and the sides, close to each other, of the two lifting boxes are fixedly connected with supporting plates correspondingly. The position of the steam turbine rotor can be changed, so that the unmaintained part of the steam turbine rotor is rotated to the position convenient to maintain, and the eight supporting rollers can support the two ends of the steam turbine rotors of different models.

Description

Technical Field

[0001] The present invention relates to the technical field of steam turbine rotors, and particularly to a positioning structure for repairing steam turbine rotors. Background Art

[0002] A steam turbine is a machine that extracts the kinetic energy of (heated) water vapor and converts it into the kinetic energy of turbine rotation. A steam turbine is particularly suitable for thermal power generation and nuclear power generation. Approximately 80% of the electricity in the world is generated using steam turbines. Among them, the rotor (i.e., the impeller) is the main component of the steam turbine. The performance of the rotor directly affects the processing efficiency of the steam turbine. When repairing the rotor of a steam turbine, generally, two sets of arc-shaped support plates are used to support both ends of the rotor.

[0003] However, it is worth considering that when repairing rotors of different models, different specifications of arc-shaped support plates need to be replaced, resulting in a relatively small scope of application and certain limitations.

[0004] Therefore, in order to solve the above problems, the emergence of a related facility that better meets the usage requirements is needed. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a positioning structure for repairing steam turbine rotors, so as to solve the problem that when repairing rotors of different models, different specifications of arc-shaped support plates need to be replaced, resulting in a relatively small scope of application.

[0006] Based on the above purpose, the present invention provides a positioning structure for repairing steam turbine rotors, including a first base and a second base. Lifting boxes are respectively arranged above the first base and the second base. The first base is equipped with a sliding locking unit adapted to the second base. A number of first hydraulic telescopic rods are respectively fixedly connected to the tops of the first base and the second base, and the telescopic ends of the first hydraulic telescopic rods are fixedly connected to the corresponding lifting boxes. Support plates are respectively fixedly connected to the sides of the two lifting boxes close to each other. Above the support plates, two first rotating shafts are provided. A support part is rotatably sleeved outside the first rotating shafts, and the support part is fixedly connected to the support plates. Two rotating plates are fixedly sleeved outside the first rotating shafts. Between adjacent two rotating plates, two support rollers for supporting the steam turbine rotor are provided. The lifting box is equipped with a rotation driving structure adapted to the support rollers, and the first rotating shaft is equipped with a positioning part adapted to the support plate.

[0007] Optionally, the rotation drive structure includes a rotating housing rotatably sleeved outside the first rotating shaft. A driving wheel is fixedly sleeved outside the rotating housing. A second rotating shaft fixedly connected thereto penetrates through the supporting roller. Two ends of the second rotating shaft respectively penetrate through two adjacent rotating plates. Two ends of the second rotating shaft are respectively fixedly connected with a driven wheel and a first stop disc. And the sides of the driven wheel and the first stop disc close to each other are respectively in contact with the corresponding rotating plates. The rotating housing and the two driven wheels are connected by a synchronous belt. A third rotating shaft is arranged below the second rotating shaft. Two ends of the third rotating shaft respectively penetrate through the two rotating plates. One end of the third rotating shaft is fixedly connected with a guide wheel adapted to the synchronous belt. The other end of the third rotating shaft is fixedly connected with a second stop disc. And the sides of the guide wheel and the second stop disc close to each other are respectively in contact with the corresponding rotating plates. The lifting box is provided with a lifting synchronous rotation assembly for driving the rotating housing to rotate.

[0008] Optionally, the lifting synchronous rotation assembly includes a first bevel gear fixedly installed on the rotating housing. Two first connecting shafts are rotatably connected to the lifting box. The top ends of the first connecting shafts are fixedly connected with second bevel gears meshing with the first bevel gear. The bottom of the lifting box is fixedly connected with a servo motor. The output end of the servo motor is fixedly connected with a first gear located inside the lifting box. A rotating sleeve is arranged below the first connecting shaft. The rotating sleeve and the lifting box are rotatably connected. And a second gear meshing with the first gear is fixedly sleeved outside the rotating sleeve. The lifting box is provided with damping synchronous parts respectively adapted to the first connecting shaft and the rotating sleeve.

[0009] Optionally, the damping synchronous part includes a lifting frame arranged below the lifting box. Two second connecting shafts are rotatably connected to the lifting frame. The bottom end of the first connecting shaft is fixedly connected with a first damping disc located inside the lifting box. The top end of the second connecting shaft is fixedly connected with a second damping disc located inside the lifting box. The top of the second damping disc is in contact with the bottom of the first damping disc. And the rotating sleeve is sleeved outside the second connecting shaft. A guide groove is formed in the second connecting shaft. A guide strip is slidably arranged in the guide groove. And the guide strip is fixedly connected with the inner wall of the rotating sleeve. At least two second hydraulic telescopic rods are fixedly connected inside the lifting box. And the telescopic ends of the second hydraulic telescopic rods are fixedly connected with the top of the lifting frame.

[0010] Advantages of the present invention: The steam turbine rotor first comes into contact with the two support rollers located in the middle above the lifting box. As the steam turbine rotor continues to move downward, the steam turbine rotor drives the two first rotating shafts to rotate in opposite directions. The first rotating shafts drive the rotating plate and the support rollers to rotate. The two support rollers located in the middle above the lifting box move downward, and the two support rollers located on both sides above the lifting box move upward. Eventually, the two support rollers located on both sides above the lifting box come into contact with the steam turbine rotor. The two ends of the steam turbine rotor are supported by eight support rollers respectively. When it is necessary to drive the steam turbine rotor to rotate on its own axis, the support rollers are driven to rotate through the rotation drive structure. The support rollers drive the steam turbine rotor to rotate on its own axis, and then the position of the steam turbine rotor can be changed so that the unmaintained part of the steam turbine rotor rotates to a convenient maintenance position. The eight support rollers can support the two ends of steam turbine rotors of different models, improving the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only those of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0012] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 is a schematic diagram of the internal structure of the lifting box in an embodiment of the present invention; Figure 3 is a schematic diagram of the structure of the lifting frame in an embodiment of the present invention; Figure 4 is a schematic diagram of the structure of the rotating sleeve in an embodiment of the present invention; Figure 5 is a schematic diagram of the structure of the rotating plate in an embodiment of the present invention; Figure 6 is a schematic diagram of the structure of the second rotating shaft in an embodiment of the present invention; Figure 7 is a schematic diagram of the structure of the driving wheel in an embodiment of the present invention; Figure 8 is a schematic diagram of the separated structure of the first base and the second base in an embodiment of the present invention.

[0013] The labels in the figure are: 1. First base; 2. Second base; 3. Lifting box; 4. First hydraulic telescopic rod; 5. Support plate; 6. First rotating shaft; 7. Rotating plate; 8. Support part; 9. Second rotating shaft; 10. Support roller; 11. Rotating shell; 12. Driving wheel; 13. Driven wheel; 14. First stop disk; 15. Third rotating shaft; 16. Second stop disk; 17. Guide wheel; 18. First bevel gear; 19. First connecting shaft; 20. Second bevel gear; 21. First damping disk; 22. Lifting frame; 23. Second hydraulic telescopic rod; 24. Second connecting shaft; 25. Second damping disk; 26. Rotating sleeve; 27. Guide groove; 28. Guide strip; 29. Synchronous belt; 30. Servo motor; 31. First gear; 32. Second gear; 33. Protective shell; 34. Slide plate; 35. Slide groove; 36. Positioning hole; 37. Mounting plate; 38. Positioning plate; 39. Handle; 40. First magnet block; 41. First iron plate; 42. Second iron plate; 43. Second magnet block. Detailed implementation mode

[0014] To make the purpose, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in combination with specific embodiments.

[0015] Embodiment 1 is given by Figure 1 , Figure 2 and Figure 5 The present invention includes a first base 1 and a second base 2. Lifting boxes 3 are respectively arranged above the first base 1 and the second base 2. The first base 1 is equipped with a sliding locking unit adapted to the second base 2. A number of first hydraulic telescopic rods 4 are respectively fixedly connected to the tops of the first base 1 and the second base 2, and the telescopic ends of the first hydraulic telescopic rods 4 are fixedly connected to the corresponding lifting boxes 3. Support plates 5 are respectively fixedly connected to one sides of the two lifting boxes 3 close to each other; Above the support plate 5, there are two first rotating shafts 6. An external rotating sleeve of the first rotating shaft 6 is provided with a support portion 8, and the support portion 8 is fixedly connected to the support plate 5. An external fixed sleeve of the first rotating shaft 6 is provided with two rotating plates 7. Between two adjacent rotating plates 7, there are two support rollers 10 for supporting the steam turbine rotor. The lifting box 3 is equipped with a rotating drive structure adapted to the support rollers 10, and the first rotating shaft 6 is equipped with a positioning member adapted to the support plate 5. The lifting box 3 is driven by the first hydraulic expansion and contraction rod 4 to move vertically, adjusting the initial height of the lifting box 3 and the support rollers 10. The steam turbine rotor is driven by an external feeding device to move above the two lifting boxes 3, and then the steam turbine rotor is driven by the external feeding device to move downward. The steam turbine rotor first contacts the two support rollers 10 located in the middle above the lifting box 3. As the steam turbine rotor continues to move downward, the steam turbine rotor drives the two first rotating shafts 6 to rotate in opposite directions. The first rotating shafts 6 drive the rotating plates 7 and the support rollers 10 to rotate. The two support rollers 10 located in the middle above the lifting box 3 move downward, and the two support rollers 10 located on both sides above the lifting box 3 move upward. Finally, the two support rollers 10 located on both sides above the lifting box 3 contact the steam turbine rotor. The two ends of the steam turbine rotor are supported by the eight support rollers 10 respectively. When it is necessary to drive the steam turbine rotor to rotate, the support rollers 10 are driven to rotate through the rotating drive structure. The support rollers 10 drive the steam turbine rotor to rotate, so as to change the position of the steam turbine rotor, so that the unrepaired part of the steam turbine rotor rotates to a convenient position for maintenance. The eight support rollers 10 can support the two ends of steam turbine rotors of different models, improving the scope of application.

[0016] Embodiment 2, on the basis of Embodiment 1, by Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7Given that the rotation drive structure includes a rotating housing 11 rotatably sleeved outside the first rotating shaft 6, a driving wheel 12 is fixedly sleeved outside the rotating housing 11, a second rotating shaft 9 fixedly connected is penetrated through the supporting roller 10, both ends of the second rotating shaft 9 penetrate through two adjacent rotating plates 7 respectively, a driven wheel 13 and a first stop disc 14 are fixedly connected to both ends of the second rotating shaft 9 respectively, and the sides of the driven wheel 13 and the first stop disc 14 close to each other are respectively in contact with the corresponding rotating plates 7. The rotating housing 11 and the two driven wheels 13 are connected by a synchronous belt 29. A third rotating shaft 15 is arranged below the second rotating shaft 9, both ends of the third rotating shaft 15 penetrate through the two rotating plates 7 respectively, a guide wheel 17 adapted to the synchronous belt 29 is fixedly connected to one end of the third rotating shaft 15, a second stop disc 16 is fixedly connected to the other end of the third rotating shaft 15, and the sides of the guide wheel 17 and the second stop disc 16 close to each other are respectively in contact with the corresponding rotating plates 7. The lifting box 3 is provided with a lifting synchronous rotation assembly for driving the rotating housing 11 to rotate. The lifting synchronous rotation assembly includes a first bevel gear 18 fixedly installed on the rotating housing 11, two first connecting shafts 19 are rotatably connected to the lifting box 3, a second bevel gear 20 meshing with the first bevel gear 18 is fixedly connected to the top end of the first connecting shaft 19, a servo motor 30 is fixedly connected to the bottom of the lifting box 3, an output end of the servo motor 30 is fixedly connected with a first gear 31 located inside the lifting box 3. A rotating sleeve 26 is arranged below the first connecting shaft 19, the rotating sleeve 26 and the lifting box 3 are rotatably connected, and a second gear 32 meshing with the first gear 31 is fixedly sleeved outside the rotating sleeve 26. The lifting box 3 is provided with a damping synchronous member adapted to the first connecting shaft 19 and the rotating sleeve 26 respectively. The damping synchronous member includes a lifting frame 22 arranged below the lifting box 3, two second connecting shafts 24 are rotatably connected to the lifting frame 22, a first damping disc 21 located inside the lifting box 3 is fixedly connected to the bottom end of the first connecting shaft 19, a second damping disc 25 located inside the lifting box 3 is fixedly connected to the top end of the second connecting shaft 24, the top of the second damping disc 25 is in contact with the bottom of the first damping disc 21, and the rotating sleeve 26 is sleeved outside the second connecting shaft 24. A guide groove 27 is formed on the second connecting shaft 24, a guide bar 28 is slidably arranged in the guide groove 27, and the guide bar 28 is fixedly connected to the inner wall of the rotating sleeve 26. At least two second hydraulic expansion rods 23 are fixedly connected inside the lifting box 3, and the telescopic ends of the second hydraulic expansion rods 23 are fixedly connected to the top of the lifting frame 22. Two protective shells 33 are fixedly connected to the top of the lifting box 3, and the first bevel gear 18 and the second bevel gear 20 are located inside the corresponding protective shells 33. The positioning member includes a second iron plate 42 fixedly installed on the first rotating shaft 6, and two adjacent second iron plates 42 are respectively located on the sides of the two first rotating shafts 6 away from each other. A second magnet block 43 is in contact with the bottom of the second iron plate 42, and the second magnet block 43 is fixedly connected to the support plate 5; When the inclination angles of the first rotating shaft 6 and the rotating plate 7 change and the eight support rollers 10 are respectively in contact with both ends of the steam turbine rotor, the lifting frame 22, the second connecting shaft 24 and the second damping disc 25 are driven to move upward by the second hydraulic telescopic rod 23, and the guide strip 28 slides in the guide groove 27. When the top of the second damping disc 25 comes into contact with the bottom of the first damping disc 21, the lifting frame 22 stops moving upward. The servo motor 30 drives the first gear 31 to rotate. The first gear 31 drives the second connecting shaft 24 and the second damping disc 25 to rotate synchronously through the second gear 32, the rotating sleeve 26 and the guide strip 28. The second damping disc 25 drives the first damping disc 21, the first connecting shaft 19 and the second bevel gear 20 to rotate self - synchronously through friction. The second bevel gear 20 can drive the rotating shell 11 and the driving wheel 12 to rotate through the first bevel gear 18. The driving wheel 12 drives two adjacent driven wheels 13 to rotate through the synchronous belt 29. The driven wheels 13 can drive the second rotating shaft 9 and the support rollers 10 to rotate self - synchronously. When the driven wheels 13 rotate self - synchronously, the driven wheels 13 drive the guide wheel 17 and the third rotating shaft 15 to rotate relative to the rotating plate 7 through the synchronous belt 29. The guide wheel 17 guides the synchronous belt 29 to ensure that the contact area between the driven wheel 13 and the synchronous belt 29 is at a preset value. Through the design of the protective shell 33, the first bevel gear 18 and the second bevel gear 20 are shielded and protected. When it is not necessary to overhaul the steam turbine rotor, the steam turbine rotor is no longer above the support rollers 10. The staff drives the rotating plate 7 and the first rotating shaft 6 to rotate in the reverse direction to the initial position. The second iron plate 42 on the first rotating shaft 6 comes into contact with the second magnet block 43. Through the magnetic attraction between the second iron plate 42 and the second magnet block 43, the first rotating shaft 6 and the rotating plate 7 are kept stationary at the initial position, and the second hydraulic telescopic rod 23 drives the lifting frame 22, the second connecting shaft 24 and the second damping disc 25 to move downward so that the second damping disc 25 is no longer in contact with the first damping disc 21. When the steam turbine rotor is placed on the support rollers 10 again, the steam turbine rotor pushes the support rollers 10, the rotating plate 7 and the first rotating shaft 6 to rotate. The second iron plate 42 is no longer magnetically attracted to the second magnet block 43, and the steam turbine rotor can be supported again by the eight support rollers 10.

[0017] Embodiment 3, on the basis of Embodiment 1, by Figure 1 、 Figure 2 、 Figure 5 and Figure 8Given that the sliding locking unit includes a mounting plate 37 disposed above the first base 1. The bottom of the mounting plate 37 is in contact with the top of the first base 1. A chute 35 is formed on one side of the first base 1 facing the second base 2. A sliding plate 34 is slidably disposed in the chute 35, and the sliding plate 34 is fixedly connected to the second base 2. A plurality of positioning holes 36 are formed on the sliding plate 34. A plurality of positioning plates 38 are fixedly connected to the bottom of the mounting plate 37. The number of the positioning plates 38 is less than the number of the positioning holes 36. And the bottom end of the positioning plate 38 is located in the corresponding positioning hole 36. The first base 1 is provided with a magnetic attraction member adapted to the mounting plate 37. A handle 39 is fixedly connected to the top of the mounting plate 37. The magnetic attraction member includes first magnet blocks 40 fixedly mounted on both sides of the first base 1 respectively. First iron plates 41 are fixedly connected to both sides of the mounting plate 37 respectively. And the bottom of the first iron plate 41 is in contact with the top of the first magnet block 40; The staff drives the mounting plate 37 to move upward through the handle 39, so that the first iron plate 41 is no longer magnetically attracted to the first magnet block 40, and the mounting plate 37 drives the positioning plate 38 to disengage from the corresponding positioning hole 36, releasing the fixed relationship between the sliding plate 34 and the first base 1. The staff drives the second base 2 to move relative to the first base 1. The sliding plate 34 slides relative to the chute 35 and the first base 1. Then, the distance between the two lifting boxes 3 can be changed according to the model of the steam turbine rotor. When the second base 2 moves relative to the first base 1 to a preset position, the staff drives the mounting plate 37 to move downward again, so that the bottom end of the positioning plate 38 is inserted into the corresponding positioning hole 36, and the first iron plate 41 is magnetically attracted to the first magnet block 40 again, then the second base 2 can be fixed relative to the first base 1 again.

[0018] Those of ordinary skill in the art should understand that: the discussion of any above embodiment is only exemplary, and is not intended to imply that the scope of the present invention is limited to these examples; under the idea of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity.

Claims

1. A steam turbine rotor maintenance positioning structure, comprising a first base (1) and a second base (2), characterized in that: A lifting box (3) is provided above the first base (1) and the second base (2), respectively; the first base (1) is provided with a sliding locking unit matched with the second base (2); a plurality of first hydraulic telescopic rods (4) are fixedly connected to the tops of the first base (1) and the second base (2), respectively; the telescopic ends of the first hydraulic telescopic rods (4) are fixedly connected to the corresponding lifting boxes (3); the two lifting boxes (3) are fixedly connected to support plates (5) on the adjacent sides; two first rotating shafts (6) are provided above the support plates (5); the outer rotating sleeves of the first rotating shafts (6) are provided with support parts (8), and the support parts (8) are fixedly connected to the support plates (5); the outer fixed sleeves of the first rotating shafts (6) are provided with two rotating plates (7); two supporting rollers (10) for supporting the steam turbine rotor are provided between two adjacent rotating plates (7); the lifting box (3) is provided with a rotating drive structure matched with the supporting rollers (10); and the first rotating shafts (6) are provided with positioning members matched with the support plates (5).

2. The steam turbine rotor maintenance positioning structure according to claim 1, characterized in that: The rotary drive structure comprises a rotary shell (11) rotatably sleeved on the outside of a first rotary shaft (6), a driving wheel (12) being fixedly sleeved on the outside of the rotary shell (11), a second rotary shaft (9) being fixedly connected to the support roller (10) passing through, two ends of the second rotary shaft (9) respectively passing through two adjacent rotary plates (7), a driven wheel (13) and a first stop plate (14) being fixedly connected to the two ends of the second rotary shaft (9), and the sides of the driven wheel (13) and the first stop plate (14) being close to each other are in contact with the corresponding rotary plates (7), and the rotary shell (11) and the two driven wheels (1 3) is connected by a synchronous belt (29), a third rotating shaft (15) is provided below the second rotating shaft (9), both ends of the third rotating shaft (15) respectively penetrate the two rotating plates (7), one end of the third rotating shaft (15) is fixedly connected to a guide wheel (17) adapted to the synchronous belt (29), the other end of the third rotating shaft (15) is fixedly connected to a second stop plate (16), and the sides of the guide wheel (17) and the second stop plate (16) close to each other are in contact with the corresponding rotating plates (7), and the lifting box (3) is equipped with a lifting synchronous rotating assembly for driving the rotating shell (11) to rotate.

3. The steam turbine rotor maintenance positioning structure according to claim 2, characterized in that: The lifting synchronous rotation assembly comprises a first bevel gear (18) fixedly mounted on a rotating shell (11); two first connecting shafts (19) are rotatably connected to the lifting box (3); the top of the first connecting shaft (19) is fixedly connected to a second bevel gear (20) meshing with the first bevel gear (18); the bottom of the lifting box (3) is fixedly connected to a servo motor (30); the output end of the servo motor (30) is fixedly connected to a first gear (31) located in the lifting box (3); a rotating sleeve (26) is provided below the first connecting shaft (19); the rotating sleeve (26) and the lifting box (3) are rotatably connected; and an outer fixed sleeve of the rotating sleeve (26) is provided with a second gear (32) meshing with the first gear (31); and the lifting box (3) is provided with damping synchronous parts respectively matched with the first connecting shaft (19) and the rotating sleeve (26).

4. The steam turbine rotor maintenance positioning structure according to claim 3, characterized in that: The damping synchronous component comprises a lifting frame (22) arranged below the lifting box (3), two second connecting shafts (24) are rotatably connected to the lifting frame (22), the bottom end of the first connecting shaft (19) is fixedly connected to a first damping plate (21) located in the lifting box (3), the top end of the second connecting shaft (24) is fixedly connected to a second damping plate (25) located in the lifting box (3), the top of the second damping plate (25) is in contact with the bottom of the first damping plate (21), and the rotating sleeve (26) is sleeved on the outside of the second connecting shaft (24), the second connecting shaft (24) is provided with a guide groove (27), a guide bar (28) is slidably provided in the guide groove (27), and the guide bar (28) is fixedly connected to the inner wall of the rotating sleeve (26), at least two second hydraulic telescopic rods (23) are fixedly connected in the lifting box (3), and the telescopic end of the second hydraulic telescopic rod (23) is fixedly connected to the top of the lifting frame (22).

5. The steam turbine rotor maintenance positioning structure according to claim 3, characterized in that: Two protective shells (33) are fixedly connected to the top of the lifting box (3), and the first bevel gear (18) and the second bevel gear (20) are located in the corresponding protective shells (33).

6. The steam turbine rotor maintenance positioning structure according to claim 1, characterized in that: The sliding locking unit comprises a mounting plate (37) arranged above the first base (1), the bottom of the mounting plate (37) contacts the top of the first base (1), a sliding groove (35) is provided on the side of the first base (1) facing the second base (2), a sliding plate (34) is slidably provided in the sliding groove (35), and the sliding plate (34) is fixedly connected to the second base (2), a plurality of positioning holes (36) are provided on the sliding plate (34), a plurality of positioning plates (38) are fixedly connected to the bottom of the mounting plate (37), the number of the positioning plates (38) being less than the number of the positioning holes (36), and the bottom ends of the positioning plates (38) are located in the corresponding positioning holes (36), and a magnetic attraction member adapted to the mounting plate (37) is installed on the first base (1).

7. The steam turbine rotor maintenance positioning structure according to claim 6, characterized in that: A handle (39) is fixedly connected to the top of the mounting plate (37).

8. The steam turbine rotor maintenance positioning structure according to claim 6, characterized in that: The magnetic attraction member comprises first magnet blocks (40) respectively fixedly mounted on both sides of the first base (1); first iron plates (41) are respectively fixedly connected to both sides of the mounting plate (37); and the bottom of the first iron plate (41) is in contact with the top of the first magnet block (40).

9. The steam turbine rotor maintenance positioning structure according to claim 1, characterized in that: The positioning member comprises a second iron plate (42) fixedly mounted on the first rotating shaft (6), and two adjacent second iron plates (42) are respectively located on the side away from the two first rotating shafts (6), and a second magnet block (43) is provided at the bottom of the second iron plate (42), and the second magnet block (43) is fixedly connected to the support plate (5).

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