Lifting tool for steam turbine rotor

Abstract

The invention discloses a steam turbine rotor lifting tool which comprises a steam turbine rotor main body and a lifting cross beam for lifting the steam turbine rotor main body, and the lifting cross beam is provided with an adjusting assembly, a clamping assembly and an auxiliary fixing assembly. The #-shaped reinforcing steel bars are additionally arranged in the hoisting cross beam, so that the hardness of the hoisting cross beam is enhanced; the moving blocks are additionally arranged on the two sides of the bottom end of the lifting cross beam, the clamping clamps are driven to move, and shaft necks at the two ends of steam turbine rotors of different specifications and sizes can be clamped; on the basis of traditional rope hoisting, the clamping clamps are additionally arranged, so that the steam turbine rotor is fixed through the rope and clamped through the clamping clamps during hoisting, and hoisting safety and stability are enhanced; and when the clamping clamps are adjusted, bevel gears are triggered to be meshed, and the rotating disc rotates, so that a gear strip additionally arranged on one side of each clamping clamp moves up and down, an extrusion block is driven to downwards abut against the shaft neck of the steam turbine rotor, and the hoisting stability of the steam turbine rotor is further improved.

Description

Technical Field

[0001] The invention relates to a lifting device, in particular to a steam turbine rotor lifting tool, belonging to the technical field of lifting equipment. Background Art

[0002] The steam turbine rotor is a key component of the steam turbine. It is heavy, large in size, and requires high precision. During the installation, inspection, and maintenance of the steam turbine, the rotor needs to be frequently lifted.

[0003] A search revealed that Chinese patent number CN112744687A discloses a steam turbine rotor lifting tool. During use, the lower suspension assembly is first hooked onto the shaft necks at both ends of the rotor. The spacing between the lower suspension assemblies can be adjusted using a movable mechanism at the bottom of the lifting base. The balance adjustment direction of the device is determined based on the data displayed on the hanging scales on the two central lifting ropes. This allows for preliminary balance adjustments to be made via the balancing mechanism on the lifting base, ensuring that the lifting tool meets the lifting requirements. This patented product still only lifts the steam turbine rotor using the lower suspension assembly. In actual use, steam turbine rotors vary in size and specifications. Failure to stably secure the two sides of the steam turbine rotor during lifting can easily cause the rotor to tilt or even fall. Summary of the Invention

[0004] The object of the present invention is to provide a steam turbine rotor lifting tool in order to solve the above problems.

[0005] The present invention achieves the above-mentioned object through the following technical solutions: a steam turbine rotor lifting tool, comprising a steam turbine rotor body and a lifting beam for lifting the steam turbine rotor body, wherein the lifting beam is provided with an adjusting component, a clamping component and an auxiliary fixing component;

[0006] The adjusting assembly is used to fix the turbine rotor bodies of different lengths. The adjusting assembly is arranged at the bottom end of the lifting beam. A bidirectional screw is provided inside the bottom end of the lifting beam. Moving blocks are provided on both sides of the bidirectional screw.

[0007] The clamping assembly is used to clamp and fix the two ends of the turbine rotor body to ensure the stability of subsequent lifting. The clamping assembly includes a first screw rod, a first bevel gear, a third bevel gear; a second screw rod and a clamping clamp;

[0008] The auxiliary fixing assembly is used to assist the clamping assembly in fixing the steam turbine rotor body. The auxiliary fixing assembly balances and fixes the steam turbine rotor body through gear bars and a pressure block.

[0009] Preferably, a driving motor is provided at one end of the bidirectional screw rod, a limit block is provided at the top of the moving block, the limit block is arranged in a "T" shape, a limit block is provided at the bottom end of the moving block, the bottom end of the limit block is connected to a telescopic cylinder, and the execution end of the telescopic cylinder is connected to a fixed rod.

[0010] Preferably, the fixed rod is arranged in a rectangular shape, and an executive motor is provided on one side of the bottom end of the fixed rod, and the executive end of the executive motor is connected to a first screw rod, and a first bevel gear is provided on the end of the first screw rod away from the executive motor, and a second bevel gear is provided on the side of the first bevel gear away from the first screw rod, and a third bevel gear is provided on the side of the second bevel gear away from the first bevel gear, and a second screw rod is provided on the end of the third bevel gear away from the first bevel gear, and the first screw rod and the second screw rod are both connected to a clamping clip.

[0011] Preferably, the two clamping clips are connected to the first screw rod and the second screw rod nut, and the two moving blocks are connected to nuts at both ends of the bidirectional screw rod.

[0012] Preferably, a plurality of rubber pads are equidistantly provided on opposite sides of the two clamping clamps.

[0013] Preferably, a placement block is provided on one side of the fixing rod, and the second bevel gear is arranged on a side of the first bevel gear close to the placement block.

[0014] Preferably, a rotating rod is connected to a side of the second bevel gear close to the placement block, and a gear plate is provided at one end of the rotating rod away from the second bevel gear, and a gear bar is connected to one side of the gear plate.

[0015] Preferably, the bottom end of the gear bar is connected to the pressing block, a plurality of shock-absorbing springs are equidistantly provided at the bottom end of the pressing block, and the bottom end of the shock-absorbing spring is connected to an extrusion block.

[0016] Preferably, limit rods are provided on both the left and right sides of the gear bar, the gear plate is engaged with the gear bar, the first bevel gear is engaged with the second bevel gear, and the second bevel gear is engaged with the third bevel gear.

[0017] Preferably, reinforcing steel bars are provided inside the lifting beam, and fixing ropes are provided on both sides of the top and in the middle of the lifting beam. The fixing rope is connected to a lifting rope at one end away from the lifting beam, and a loop rope is provided at the bottom end of the lifting beam and on one side of the clamping clamp.

[0018] The present invention has the following beneficial effects:

[0019] 1. Add a well-shaped steel bar inside the lifting beam to strengthen the hardness of the lifting beam and avoid bending of the lifting beam during lifting. The reinforcement of the steel bar also increases the service life of the lifting beam.

[0020] 2. Adjustable moving blocks are added on both sides of the bottom end of the lifting beam to drive the position of the clamp to move, which can clamp the shaft journals at both ends of turbine rotors of different specifications and sizes;

[0021] 3. On the basis of traditional rope lifting, a clamping clamp is added, so that the turbine rotor is not only fixed by the rope but also clamped by the clamp during lifting, which improves the lifting stability of the turbine rotor and enhances the lifting safety and stability;

[0022] 4. When the clamp is adjusted, the bevel gear is engaged and the rotating disk is rotated, causing the gear bar added on one side of the clamp to move up and down, driving the extrusion block downward to press against the shaft neck of the turbine rotor, further improving the lifting stability of the turbine rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a three-dimensional diagram of the overall structure of a steam turbine rotor lifting tool proposed by the present invention;

[0024] Figure 2 A three-dimensional diagram of the lifting beam structure of a steam turbine rotor lifting tool proposed by the present invention;

[0025] Figure 3 This is a three-dimensional diagram of the structure of an adjustment assembly of a steam turbine rotor lifting tool proposed by the present invention;

[0026] Figure 4 This is a three-dimensional diagram of the structure of a steam turbine rotor lifting tool clamping assembly proposed by the present invention;

[0027] Figure 5 This is a three-dimensional diagram of the structure of an auxiliary fixing assembly of a steam turbine rotor lifting tool proposed by the present invention;

[0028] Figure 6 This is a three-dimensional diagram of the structure of an auxiliary fixing assembly of a steam turbine rotor lifting tool proposed by the present invention;

[0029] Figure 7 This is a three-dimensional diagram of the structure of the auxiliary fixing assembly of the steam turbine rotor lifting tool proposed by the present invention.

[0030] In the figure: 1. Lifting beam; 101. Fixing rope; 102. Lifting rope; 2. Reinforcement steel bar; 3. Adjustment assembly; 301. Drive motor; 302. Bidirectional screw; 303. Moving block; 304. Limiting block; 305. Limiting block; 306. Telescopic cylinder; 307. Fixed rod; 4. Clamping assembly; 401. Executing motor; 402. First screw; 403. First bevel gear; 404. Second bevel gear; 405. Third bevel gear; 406. Second screw; 407. Clamping clamp; 408. Rubber pad; 5. Auxiliary fixing assembly; 501. Rotating rod; 502. Gear plate; 503. Placement block; 504. Gear bar; 505. Limiting rod; 506. Pressure block; 507. Shock-absorbing spring; 508. Extrusion block; 6. Rope; 7. Turbine rotor body. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] Example 1:

[0033] Reference Figure 1-7 A steam turbine rotor lifting tool includes a steam turbine rotor body 7 and a lifting beam 1 for lifting the steam turbine rotor body 7. The lifting beam 1 is provided with an adjusting component 3, a clamping component 4 and an auxiliary fixing component 5. The adjusting component 3 is used to fix the steam turbine rotor body 7 of different lengths. The adjusting component 3 is arranged at the bottom end of the lifting beam 1. A bidirectional screw rod 302 is provided inside the bottom end of the lifting beam 1, and a moving block 303 is provided on both sides of the bidirectional screw rod 302.

[0034] A driving motor 301 is provided at one end of the bidirectional screw rod 302, a limit block 304 is provided at the top of the moving block 303, and the limit block 304 is arranged in a "T" shape. A limit block 305 is provided at the bottom end of the moving block 303, and the bottom end of the limit block 305 is connected to a telescopic cylinder 306, and the execution end of the telescopic cylinder 306 is connected to a fixed rod 307.

[0035] The interior of the lifting beam 1 is provided with reinforcing steel bars 2, and fixing ropes 101 are provided on both sides of the top and in the middle of the lifting beam 1. The end of the fixing rope 101 away from the lifting beam 1 is connected to a lifting rope 102, and a loop rope 6 is provided at the bottom end of the lifting beam 1 and on one side of the clamping clamp 407.

[0036] In this embodiment, it should be noted that: when the turbine rotor body 7 is lifted and moved, the lifting beam 1 is moved to the position of the turbine rotor body 7 by raising and lowering the lifting rope 102. By default, the clamping clamp 407 is open, so that the clamping clamp 407 is aligned with the shaft necks on both sides of the turbine rotor body 7. After the clamping clamp 407 clamps the shaft necks on both sides of the turbine rotor body 7, the ropes 6 on both sides of the bottom end of the lifting beam 1 are put on the shaft necks on both sides of the turbine rotor body 7, the length of the ropes 6 is adjusted, the turbine rotor body 7 is stably fixed, and the lifting rope 102 is wound to realize the lifting operation.

[0037] Fixed steel bars 2 are added inside the lifting beam 1 and distributed in a grid pattern according to the mechanical analysis results, so as to enhance the deformation resistance of the lifting beam 1 when bearing the eccentric load of the turbine rotor body 7, improve the overall structural strength and stability, and increase the service life of the lifting beam 1.

[0038] Example 2:

[0039] The difference from the first embodiment is that, referring to Figure 1-7 This embodiment also has the following further contents: the clamping assembly 4 is used to clamp and fix the two ends of the turbine rotor body 7 to ensure the stability of subsequent lifting. The clamping assembly 4 includes a first screw rod 402, a first bevel gear 403, a third bevel gear; 405, a second screw rod 406 and a clamping clamp 407.

[0040] The fixed rod 307 is arranged in a rectangular shape, and an actuator motor 401 is provided on one side of the bottom end of the fixed rod 307. The actuator end of the actuator motor 401 is connected to a first screw rod 402, and a first bevel gear 403 is provided on the end of the first screw rod 402 away from the actuator motor 401. A second bevel gear 404 is provided on the side of the first bevel gear 403 away from the first screw rod 402, and a third bevel gear 405 is provided on the side of the second bevel gear 404 away from the first bevel gear 403. A second screw rod 406 is provided on the end of the third bevel gear 405 away from the first bevel gear 403. The first screw rod 402 and the second screw rod 406 are both connected to a clamping clip 407.

[0041] The two clamping clips 407 are connected to the first screw rod 402 and the second screw rod 406 through nuts, and the two moving blocks 303 are connected to both ends of the bidirectional screw rod 302 through nuts.

[0042] A plurality of rubber pads 408 are equidistantly provided on opposite sides of the two clamping clamps 407 .

[0043] In this embodiment, it should be noted that: according to the size of the turbine rotor body 7, the driving motor 301 is started to drive the bidirectional screw rod 302 to rotate, and the moving blocks 303 connected to the nuts on both sides of the bidirectional screw rod 302 move closer to or away from each other, thereby adjusting the position of the bottom clamping clip 407.

[0044] The "T"-shaped limit block 304 at the top of the moving block 303 moves inside the lifting beam 1, and the moving block 303 moves on the bidirectional screw rod 302 through the nut. The limit block 304 moves synchronously inside the lifting beam 1, so that the clamping clamp 407 clamps and fixes the turbine rotor body 7 and then lifts it. The bidirectional screw rod 302 and the lifting beam 1 both exert tension on the turbine rotor body 7.

[0045] Example 3:

[0046] Reference Figure 1-7 Compared with the first and second embodiments, in this embodiment: the auxiliary fixing assembly 5 is used to assist the clamping assembly 4 in fixing the turbine rotor body 7, and the auxiliary fixing assembly 5 balances and fixes the turbine rotor body 7 through the gear bar 504 and the pressure block 506.

[0047] A placement block 503 is provided on one side of the fixed rod 307, and the second bevel gear 404 is arranged on the side of the first bevel gear 403 close to the placement block 503. The side of the second bevel gear 404 close to the placement block 503 is connected to a rotating rod 501, and the end of the rotating rod 501 away from the second bevel gear 404 is provided with a gear plate 502, and one side of the gear plate 502 is connected to a gear bar 504.

[0048] The bottom end of the gear bar 504 is connected to the pressing block 506 . The bottom end of the pressing block 506 is provided with a plurality of shock-absorbing springs 507 at equal intervals. The bottom end of the shock-absorbing spring 507 is connected to an extrusion block 508 .

[0049] Limiting levers 505 are provided on both sides of the gear bar 504 . The gear plate 502 is engaged with the gear bar 504 . The first bevel gear 403 is engaged with the second bevel gear 404 . The second bevel gear 404 is engaged with the third bevel gear 405 .

[0050] In this embodiment, it should be noted that: the execution motor 401 is started to drive the first screw rod 402 to rotate, which in turn drives the first bevel gear 403 to rotate, the second bevel gear 404 meshing with the first bevel gear 403 to rotate, and the third bevel gear 405 meshing with the second bevel gear 404 to rotate, further driving the second screw rod 406 to rotate, so that the clamping clamps 407 connected to the nuts of the first screw rod 402 and the second screw rod 406 approach each other, clamping the shaft necks at both ends of the turbine rotor body 7. When the clamping clamps 407 approach each other, the second bevel gear 404 rotates to drive the rotating rod 501 to rotate, thereby rotating the gear plate 502, and the gear bar 504 meshing with one side of the gear plate 502 moves up and down, driving the pressing block 506 to move downward to press against the top ends of the shaft necks at both ends of the turbine rotor body 7, forming a set of interactive forces with the upward pulling force of the rope 6, fixing the position of the turbine rotor body 7, and preventing the turbine rotor body 7 from tilting or falling during the lifting process.

[0051] Both the fixing rod 307 and the placement block 503 are provided with a slot for use with the limiting rod 505, so that the limiting rod 505 can move up and down on the slot. The setting of the limiting rod 505 limits and fixes the position of the gear bar 504 to prevent the gear bar 504 from falling directly from the placement block 503.

[0052] The rubber pad 408 inside the clamping clamp 407 strengthens the friction between the clamping clamp 407 and the turbine rotor body 7, thereby improving the stability of the clamping.

Claims

1. A steam turbine rotor lifting tool, comprising a steam turbine rotor body (7) and a lifting beam (1) for lifting the steam turbine rotor body (7), characterized in that: The lifting beam (1) is provided with an adjusting component (3), a clamping component (4) and an auxiliary fixing component (5); The adjusting assembly (3) is used to fix the turbine rotor bodies (7) of different lengths. The adjusting assembly (3) is arranged at the bottom end of the lifting beam (1). A bidirectional screw rod (302) is provided inside the bottom end of the lifting beam (1). Moving blocks (303) are provided on both sides of the bidirectional screw rod (302). The clamping assembly (4) is used to clamp and fix the two ends of the turbine rotor body (7) to ensure the stability of subsequent lifting. The clamping assembly (4) includes a first screw rod (402), a first bevel gear (403), a third bevel gear (405), a second screw rod (406) and a clamp (407); The auxiliary fixing assembly (5) is used to assist the clamping assembly (4) in fixing the steam turbine rotor body (7). The auxiliary fixing assembly (5) balances and fixes the steam turbine rotor body (7) through a gear bar (504) and a pressing block (506).

2. A steam turbine rotor lifting tool according to claim 1, characterized in that: A driving motor (301) is provided at one end of the bidirectional screw rod (302), a limiting block (304) is provided at the top end of the moving block (303), and the limiting block (304) is arranged in a "T" shape. A limiting block (305) is provided at the bottom end of the moving block (303), and the bottom end of the limiting block (305) is connected to a telescopic cylinder (306), and the execution end of the telescopic cylinder (306) is connected to a fixed rod (307).

3. A steam turbine rotor lifting tool according to claim 2, characterized in that: The fixed rod (307) is arranged in a rectangular shape, and an execution motor (401) is provided on one side of the bottom end of the fixed rod (307), and the execution end of the execution motor (401) is connected to a first screw rod (402), and a first bevel gear (403) is provided on the end of the first screw rod (402) away from the execution motor (401), and a second bevel gear (404) is provided on the side of the first bevel gear (403) away from the first bevel gear (402), and a third bevel gear (405) is provided on the side of the second bevel gear (404) away from the first bevel gear (403), and a second screw rod (406) is provided on the end of the third bevel gear (405) away from the first bevel gear (403), and the first screw rod (402) and the second screw rod (406) are both connected to a clamping clamp (407).

4. A steam turbine rotor lifting tool according to claim 3, characterized in that: The two clamping clamps (407) are connected to the first screw rod (402) and the second screw rod (406) by screw nuts, and the two moving blocks (303) are connected to both ends of the bidirectional screw rod (302) by screw nuts.

5. The steam turbine rotor lifting tool according to claim 4, characterized in that: A plurality of rubber pads (408) are equidistantly provided on opposite sides of the two clamping clamps (407).

6. The steam turbine rotor lifting tool according to claim 5, characterized in that: A placement block (503) is provided on one side of the fixing rod (307), and the second bevel gear (404) is provided on a side of the first bevel gear (403) close to the placement block (503).

7. A steam turbine rotor lifting tool according to claim 6, characterized in that: A rotating rod (501) is connected to the side of the second bevel gear (404) close to the placement block (503), and a gear plate (502) is provided at one end of the rotating rod (501) away from the second bevel gear (404), and a gear bar (504) is connected to one side of the gear plate (502).

8. The steam turbine rotor lifting tool according to claim 7, characterized in that: The bottom end of the gear bar (504) is connected to the pressing block (506), and a plurality of shock-absorbing springs (507) are equidistantly provided at the bottom end of the pressing block (506), and the bottom end of the shock-absorbing spring (507) is connected to an extrusion block (508).

9. The steam turbine rotor lifting tool according to claim 8, characterized in that: Limiting levers (505) are provided on both the left and right sides of the gear bar (504); the gear plate (502) is meshed with the gear bar (504); the first bevel gear (403) is meshed with the second bevel gear (404); and the second bevel gear (404) is meshed with the third bevel gear (405).

10. The steam turbine rotor lifting tool according to claim 9, characterized in that: The interior of the lifting beam (1) is provided with reinforcing steel bars (2), and fixing ropes (101) are provided on both sides of the top and in the middle of the lifting beam (1). The fixing rope (101) is connected to a lifting rope (102) at one end away from the lifting beam (1), and a loop rope (6) is provided at the bottom end of the lifting beam (1) and on one side of the clamping clamp (407).

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