A hoisting tool for a steam turbine rotor

Abstract

This invention discloses a turbine rotor lifting tool, including a turbine rotor body and a lifting beam for lifting the turbine rotor body. The lifting beam is equipped with an adjustment component, a clamping component, and an auxiliary fixing component. This invention adds a grid-shaped steel reinforcement inside the lifting beam to enhance its rigidity; it adds movable blocks on both sides of the bottom end of the lifting beam, which move the clamping clamps to clamp the journals at both ends of turbine rotors of different sizes; based on traditional rope lifting, the addition of clamping clamps ensures that the turbine rotor is secured not only by ropes but also by the clamping clamps during lifting, enhancing lifting safety and stability; during clamping clamp adjustment, bevel gear engagement and rotation of the rotating disk are triggered, causing the gear rack added to one side of the clamping clamp to move up and down, driving the pressing block downwards to press against the turbine rotor journals, further improving the lifting stability of the turbine rotor.

Description

Technical Field

[0001] This invention relates to lifting devices, specifically a turbine rotor lifting tool, belonging to the technical field of lifting equipment. Background Technology

[0002] The turbine rotor is a key component of the turbine, characterized by its large weight, size, and high precision requirements. Frequent lifting operations are necessary during the installation, inspection, and maintenance of the turbine.

[0003] A search revealed Chinese patent CN112744687A, which discloses a turbine rotor lifting tool. In use, the lower suspension assembly is first attached to the journals at both ends of the rotor. The spacing of the lower suspension assembly can be adjusted by a moving mechanism at the bottom of the lifting base. Simultaneously, the balance adjustment direction is determined based on data displayed on the scales on the two middle lifting ropes. A preliminary balance adjustment is then performed by the balancing mechanism on the lifting base, ensuring the lifting tool meets the lifting requirements. However, this patented product only uses the lower suspension assembly to lift the turbine rotor. In actual use, turbine rotors vary in size and specifications. If the sides of the turbine rotor are not stably secured during lifting, the turbine rotor can easily tilt or even fall. Summary of the Invention

[0004] The purpose of this invention is to provide a turbine rotor lifting tool in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solution: a turbine rotor lifting tool, comprising a turbine rotor body and a lifting beam for lifting the turbine rotor body, wherein the lifting beam is provided with an adjustment component, a clamping component and an auxiliary fixing component;

[0006] The adjustment assembly is used to fix the turbine rotor body of different lengths. The adjustment assembly is set at the bottom end of the lifting beam. The bottom end of the lifting beam is provided with a double-acting screw, and there are moving blocks on both sides of the double-acting screw.

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

[0008] The auxiliary fixing component is used to assist the clamping component in fixing the turbine rotor body. The auxiliary fixing component uses a gear rack and a pressure block to balance and fix the turbine rotor body.

[0009] Preferably, one end of the bidirectional lead screw is provided with a drive motor, the top of the moving block is provided with a limiting block, the limiting block is arranged in a "T" shape, the bottom end of the moving block is provided with a limiting block, the bottom end of the limiting block is connected to a telescopic cylinder, and the actuating end of the telescopic cylinder is connected to a fixed rod.

[0010] Preferably, the fixing rod is rectangular in shape, and an actuating motor is provided on one side of the bottom end of the fixing rod. The actuating end of the actuating motor is connected to a first lead screw. A first bevel gear is provided at the end of the first lead screw away from the actuating motor. A second bevel gear is provided at the side of the first bevel gear away from the first lead screw. A third bevel gear is provided at the side of the second bevel gear away from the first bevel gear. A second lead screw is provided at the end of the third bevel gear away from the first bevel gear. Both the first lead screw and the second lead screw are connected to clamping clips.

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

[0012] Preferably, both clamps are provided with multiple rubber pads at equal intervals on opposite sides.

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

[0014] Preferably, a rotating rod is connected to the side of the second bevel gear near the placement block, and a gear disk is provided at the end of the rotating rod away from the second bevel gear, with a gear rack connected to one side of the gear disk.

[0015] Preferably, the bottom end of the gear rack is connected to the pressing block, and the bottom end of the pressing block is provided with a plurality of shock-absorbing springs at equal intervals, and the bottom end of the shock-absorbing springs is connected to a squeezing block.

[0016] Preferably, the gear rack is provided with limiting levers on both the left and right sides, the gear disk meshes with the gear rack, the first bevel gear meshes with the second bevel gear, and the second bevel gear meshes with the third bevel gear.

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

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

[0019] 1. Add a grid-shaped steel bar inside the lifting beam to strengthen the beam's rigidity, prevent it from bending during lifting, and increase its service life.

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

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

[0022] 4. During clamp adjustment, the bevel gear meshing and the rotating disk are triggered, causing the gear rack added to one side of the clamp to move up and down, driving the pressing block to press against the journal of the turbine rotor, further improving the lifting stability of the turbine rotor. Attached Figure Description

[0023] Figure 1 This is a perspective view of the overall structure of a turbine rotor lifting tool proposed in this invention;

[0024] Figure 2 This is a perspective view of the lifting beam structure of a turbine rotor lifting tool proposed in this invention;

[0025] Figure 3 This is a perspective view of the structure of an adjustment assembly for a turbine rotor lifting tool proposed in this invention;

[0026] Figure 4 This is a perspective view of a turbine rotor lifting tool clamping assembly structure proposed in this invention;

[0027] Figure 5 This is a perspective view of an auxiliary fixing component structure for a turbine rotor lifting tool proposed in this invention;

[0028] Figure 6 This is a perspective view of an auxiliary fixing component structure for a turbine rotor lifting tool proposed in this invention;

[0029] Figure 7 This is a perspective view of an auxiliary fixing component structure for a turbine rotor lifting tool proposed in this invention.

[0030] In the diagram: 1. Lifting beam; 101. Fixing rope; 102. Lifting rope; 2. Reinforcing steel bar; 3. Adjusting assembly; 301. Drive motor; 302. Double-acting lead screw; 303. Moving block; 304. Limiting block; 305. Limiting block; 306. Telescopic cylinder; 307. Fixing rod; 4. Clamping assembly; 401. Actuating motor; 402. First lead screw; 403. First bevel gear; 404. Second bevel gear; 405. Third bevel gear; 406. Second lead screw; 407. Clamping clamp; 408. Rubber pad; 5. Auxiliary fixing assembly; 501. Rotating rod; 502. Gear disc; 503. Placement block; 504. Gear rack; 505. Limiting rod; 506. Pressing block; 507. Shock-absorbing spring; 508. Compression block; 6. Rope loop; 7. Steam turbine rotor body. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] Example 1:

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

[0034] One end of the bidirectional lead screw 302 is provided with a drive motor 301, the top of the moving block 303 is provided with a limiting block 304, the limiting block 304 is arranged in a "T" shape, the bottom end of the moving block 303 is provided with a limiting block 305, the bottom end of the limiting block 305 is connected to a telescopic cylinder 306, and the actuating end of the telescopic cylinder 306 is connected to a fixing rod 307.

[0035] The lifting beam 1 is equipped with reinforcing steel bars 2 inside. The top two sides and the middle of the lifting beam 1 are equipped with fixing ropes 101. The end of the fixing rope 101 away from the lifting beam 1 is connected to a lifting rope 102. The bottom end of the lifting beam 1 and the side of the clamping clamp 407 is equipped with a loop rope 6.

[0036] In this embodiment, it should be noted that when lifting and moving the turbine rotor body 7, 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 in the open state, so that the clamping clamp 407 is aligned with the journals on both sides of the turbine rotor body 7. After the clamping clamp 407 clamps the journals on both sides of the turbine rotor body 7, the loop ropes 6 on both sides of the bottom end of the lifting beam 1 are looped on the journals on both sides of the turbine rotor body 7. The length of the loop rope 6 is adjusted to stabilize and fix the turbine rotor body 7. The lifting rope 102 is then wound up to realize the lifting operation.

[0037] Fixed reinforcing bars 2 are added inside the lifting beam 1. Based on the mechanical analysis results, they are distributed in a grid pattern to enhance the lifting beam 1's resistance to deformation when bearing the eccentric load of the turbine rotor body 7, improve the overall structural strength and stability, and extend the service life of the lifting beam 1.

[0038] Example 2:

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

[0040] The fixing rod 307 is rectangular in shape. An actuating motor 401 is provided on one side of the bottom end of the fixing rod 307. The actuating end of the actuating motor 401 is connected to a first lead screw 402. A first bevel gear 403 is provided at the end of the first lead screw 402 away from the actuating motor 401. A second bevel gear 404 is provided at the side of the first bevel gear 403 away from the first lead screw 402. A third bevel gear 405 is provided at the side of the second bevel gear 404 away from the first bevel gear 403. A second lead screw 406 is provided at the end of the third bevel gear 405 away from the first bevel gear 403. Both the first lead screw 402 and the second lead screw 406 are connected to a clamping clip 407.

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

[0042] Multiple rubber pads 408 are provided at equal intervals on opposite sides of the two clamping clips 407.

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

[0044] The limiting block 304, which is set in a "T" shape at the top of the moving block 303, moves inside the lifting beam 1. The moving block 303 moves on the double-acting screw 302 through a screw nut connection. The limiting block 304 moves synchronously inside the lifting beam 1. When the clamping clamp 407 clamps and fixes the turbine rotor body 7 and then lifts it, both the double-acting screw 302 and the lifting beam 1 exert tension on the turbine rotor body 7.

[0045] Example 3:

[0046] Reference Figure 1-7 Compared to Embodiment 1 and Embodiment 2, in this embodiment: the auxiliary fixing component 5 is used to assist the clamping component 4 in fixing the turbine rotor body 7, and the auxiliary fixing component 5 uses the gear rack 504 and the pressing block 506 to balance and fix the turbine rotor body 7.

[0047] A placement block 503 is provided on one side of the fixed rod 307. The second bevel gear 404 is located on the side of the first bevel gear 403 near the placement block 503. A rotating rod 501 is connected to the side of the second bevel gear 404 near the placement block 503. A gear disk 502 is provided at the end of the rotating rod 501 away from the second bevel gear 404. A gear rack 504 is connected to one side of the gear disk 502.

[0048] The bottom end of the gear rack 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 springs 507 is connected to a pressing block 508.

[0049] Limiting levers 505 are provided on both the left and right sides of the gear rack 504. The gear disk 502 meshes with the gear rack 504. The first bevel gear 403 meshes with the second bevel gear 404. The second bevel gear 404 meshes with the third bevel gear 405.

[0050] In this embodiment, it should be noted that: the start of the actuator motor 401 drives the first lead screw 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 lead screw 406 to rotate, causing the clamping clamps 407 connected to the lead screws 402 and 406 to move closer together, clamping the journals at both ends of the turbine rotor body 7. When the clamping clamps 407 move closer together, the rotation of the second bevel gear 404 drives the rotating rod 501 to rotate, which in turn causes the gear disk 502 to rotate. The gear rack 504 meshing with one side of the gear disk 502 moves up and down, causing the pressing block 506 to move downward and press against the top of the journals at both ends of the turbine rotor body 7. This forms a set of interaction forces with the upward tension 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 slots that are used in conjunction with the limiting rod 505, so that the limiting rod 505 can move up and down in the slots. The setting of the limiting rod 505 limits and fixes the position of the gear rack 504, preventing the gear rack 504 from falling directly off the placement block 503.

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

Claims

1. A turbine rotor lifting tool, comprising a turbine rotor body (7) and a lifting beam (1) for lifting the turbine rotor body (7), characterized in that: The lifting beam (1) is equipped with an adjustment component (3), a clamping component (4), and an auxiliary fixing component (5); The adjustment component (3) is used to fix the turbine rotor body (7) of different lengths. The adjustment component (3) is set at the bottom end of the lifting beam (1). The bottom end of the lifting beam (1) is provided with a double-acting screw (302). Both sides of the double-acting screw (302) are provided with moving blocks (303). One end of the double-acting screw (302) is provided with a drive motor (301). The top of the moving block (303) is provided with a limiting block (304). The limiting block (304) is set in a "T" shape. The bottom end of the moving block (303) is provided with a limiting block (305). The bottom end of the limiting block (305) is connected to a telescopic cylinder (306). The execution end of the telescopic cylinder (306) is connected to a fixing rod (307). The clamping assembly (4) is used to clamp and fix both ends of the turbine rotor body (7) to ensure the stability of subsequent lifting. The clamping assembly (4) includes a first lead screw (402), a first bevel gear (403), a third bevel gear (405), a second lead screw (406), and a clamping clamp (407). The fixing rod (307) is rectangular. An actuator motor (401) is provided on one side of the bottom end of the fixing rod (307). The actuator end of the actuator motor (401) is connected to the first lead screw (402). The first bevel gear (403) is provided at the end of the first lead screw (402) away from the actuator motor (401). A second bevel gear (404) is provided on the side of the bevel gear (403) away from the first lead screw (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 lead screw (406) is provided at the end of the third bevel gear (405) away from the first bevel gear (403). Both the first lead screw (402) and the second lead screw (406) are connected to a clamping clip (407). A placement block (503) is provided on one side of the fixing rod (307), and the second bevel gear (404) is located on the side of the first bevel gear (403) close to the placement block (503). The auxiliary fixing component (5) is used to assist the clamping component (4) in fixing the turbine rotor body (7). The auxiliary fixing component (5) uses a gear rack (504) and a pressing block (506) to balance and fix the turbine rotor body (7). The second bevel gear (404) is connected to a rotating rod (501) on the side near the placement block (503). A gear disk (502) is provided at the end of the rotating rod (501) away from the second bevel gear (404). A gear rack (504) is connected to one side of the gear disk (502). The bottom end of the gear rack (504) is connected to the pressing block (506). A plurality of shock-absorbing springs (507) are provided at equal intervals at the bottom end of the pressing block (506). A pressing block (508) is connected to the bottom end of the shock-absorbing springs (507). Limiting rods (505) are provided on both the left and right sides of the gear rack (504). The gear disk (502) meshes with the gear rack (504). The first bevel gear (403) meshes with the second bevel gear (404). The second bevel gear (404) meshes with the third bevel gear (405).

2. The turbine rotor lifting tool according to claim 1, characterized in that: The two clamps (407) are connected to the first lead screw (402) and the second lead screw (406) with nuts, and the two moving blocks (303) are connected to both ends of the bidirectional lead screw (302) with nuts.

3. A turbine rotor lifting tool according to claim 2, characterized in that: Both clamps (407) are provided with multiple rubber pads (408) at equal intervals on opposite sides.

4. A turbine rotor lifting tool according to claim 3, characterized in that: The lifting beam (1) is equipped with reinforcing steel bars (2) inside. The top two sides and the middle of the lifting beam (1) are equipped with fixing ropes (101). The end of the fixing rope (101) away from the lifting beam (1) is connected to a lifting rope (102). The bottom end of the lifting beam (1) and the side of the clamp (407) is equipped with a loop rope (6).

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