A lifting tool for the rotor threading of a generator

Abstract

The present invention belongs to the field of generator processing technology, and in particular to a lifting tool for a generator rotor, which includes a crossbeam, a pushing mechanism provided at the bottom of the crossbeam, a pushing block connected to the pushing mechanism, a mounting plate installed at the bottom of the pushing block, a T-slot provided at the bottom of the mounting plate, a T-block slidably installed in the T-slot, a rear end winding mechanism provided at the bottom of the T-block, a push rod motor installed on the left side of the mounting plate, the output shaft of the push rod motor connected to the T-block, two welding rods installed at the bottom of the mounting plate, the bottoms of the two welding rods connected to the same stabilizing plate, and two telescopic rods slidably installed on the stabilizing plate. Based on the problems of the tool and the actual working conditions, the present invention designs two screws and adds a power device respectively. The two sides are designed to move simultaneously or be controlled separately, both sides can be raised and lowered, and can be electrically pushed and installed, which can improve work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of generator processing, in particular to a lifting tool for passing a generator rotor. Background Art

[0002] Removing and piercing the rotor during a generator overhaul is a key task. Generators #7 and #8 in our plant are manufactured by Dongfang Electric Machinery Factory, model QFS-300-2. The manufacturer provides specialized tools, including a lifting device consisting of a simple bracket, screw, and nut. To use the lifting device, the rotor is lifted as high as possible using a crane, and the nut is tightened to tighten the lifting device's wire rope. After several uses, it was discovered that tightening the nut often prevented the wire rope from tightening. Therefore, a crossbeam was installed, and a "jack" was used to tighten the wire rope. Even with this, the rotor still dropped significantly after tightening the wire rope, necessitating multiple repetitions. Because the lifting device must be used multiple times for each rotor removal and installation, this task typically requires four to five people and takes several hours to complete.

[0003] The existing generator rotor needs to be hoisted when it is inserted, and the rotor used still has a large drop, which affects the processing efficiency. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the existing generator rotor that requires lifting and the rotor used still has a large drop, which affects the processing efficiency, and to propose a lifting tool for the generator rotor.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A lifting tool for a generator rotor, comprising a crossbeam, a pushing mechanism provided at the bottom of the crossbeam, a pushing block connected to the pushing mechanism, a mounting plate installed at the bottom of the pushing block, a T-slot provided at the bottom of the mounting plate, a T-block slidably installed in the T-slot, a rear end winding mechanism provided at the bottom of the T-block, a push rod motor installed at the left side of the mounting plate, an output shaft of the push rod motor connected to the T-block, two welding rods provided at the bottom of the mounting plate, the bottoms of the two welding rods being connected to the same stabilizing plate, two telescopic rods slidably installed on the stabilizing plate, a screw mechanism provided at the bottom of the mounting plate, the telescopic rods being connected to the corresponding screw mechanism, a connecting piece provided at the bottom of each of the two telescopic rods, and a connecting mechanism provided at the bottom of the two connecting pieces;

[0007] The pushing mechanism includes a motor and a threaded rod. A pushing groove is provided at the bottom of the crossbeam. The pushing block is slidably installed in the pushing groove. The threaded rod is rotatably installed in the pushing groove. The pushing block is threadedly connected to the outer side of the threaded rod. The motor is embedded in the inner wall of the pushing groove. The output shaft of the motor is connected to the threaded rod. A support rod is fixedly installed in the pushing groove. The pushing block is slidably installed on the outer side of the support rod.

[0008] The rear end winding mechanism includes a fixed box, which is installed at the bottom of the T-block. A winding shaft is rotatably installed in the fixed box. Two winding wheels are installed on the outside of the winding shaft. Steel wire ropes are provided on the outside of the two winding wheels. Hooks are provided at the bottom of the two steel wire ropes. A servo motor is installed on the outside of the fixed box. The output shaft of the servo motor is connected to the end of the winding shaft. A through hole is opened at the bottom of the fixed box, and the steel wire rope is movably connected to the through hole.

[0009] The screw mechanism includes a worm motor, which is embedded in the bottom of the mounting plate. A screw is installed on the output shaft of the worm motor. A screw groove is opened on the top of the telescopic rod, and the screw is threadedly connected to the screw groove.

[0010] Furthermore, two sliding holes are provided on the stabilizing plate, and the telescopic rod is slidably connected to the inner walls of the corresponding sliding holes.

[0011] Furthermore, the connecting mechanism includes a steel rope, the top end of the steel rope is rotatably connected to the connecting piece, and the bottom end of the steel rope is connected to a U-shaped lock.

[0012] In the present invention, the beneficial effects of the hoisting tool for the generator rotor are as follows:

[0013] 1. First, set two steel wires on the front end of the rotor, then use a U-shaped lock to connect the steel wires, and use two hooks to connect to the rear end of the rotor. Start the servo motor to drive the two reel wheels to rotate through the reel shaft. The two reel wheels reel in the two steel ropes, and the rear end of the rotor can be extracted. Use the push rod motor to push the T-block to move, and the T-block drives the rear end reeling mechanism to move, and the position of the two steel ropes and the two hooks can be adjusted.

[0014] 2. Use two worm motors to drive two screws to rotate. The screws drive the telescopic rods upward through the screw slots. The two telescopic rods drive the front end of the rotor upward through two steel ropes and two U-locks. Then the rotor is aligned and installed. The design of the screw connection on both sides can move simultaneously or be controlled separately, and can be fine-tuned to facilitate alignment and installation. The motor drives the threaded rod to rotate, and the threaded rod drives the push block to push in the direction of installation, which can push the rotor forward into the generator housing, thereby improving work efficiency.

[0015] According to the problems of the tool and the actual working conditions, the present invention designs two screw rods with power devices respectively. The two sides are designed to move simultaneously or be controlled separately. Both sides can be raised and lowered, and can be installed by electric pushing, which can improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a lifting tool for a generator rotor according to the present invention;

[0017] Figure 2 This is a schematic structural diagram of part A of a generator rotor lifting tool proposed by the present invention;

[0018] Figure 3 This is a schematic structural diagram of part B of a lifting tool for passing through a generator rotor proposed by the present invention;

[0019] Figure 4 This is a schematic structural diagram of the screw mechanism and the connecting mechanism proposed in the present invention;

[0020] Figure 5 This is a schematic diagram of the three-dimensional structure of the T-block proposed in the present invention.

[0021] In the figure: 1. Beam; 2. Motor; 3. Threaded rod; 4. Push block; 5. Support rod; 6. Push slot; 7. Mounting plate; 8. T-slot; 9. T-block; 10. Push rod motor; 11. Fixing box; 12. Reel; 13. Wire rope; 14. Servo motor; 15. Hook; 16. Worm motor; 17. Welding rod; 18. Connector; 20. Screw; 21. Stabilizing plate; 22. Slide hole; 23. Screw slot; 24. Telescopic rod; 25. Reel; 26. Wire rope; 27. U-lock. DETAILED DESCRIPTION

[0022] The technical solution of this embodiment will be clearly and completely described below in conjunction with the drawings in this embodiment. Obviously, the described embodiment is only a part of this embodiment, rather than all the embodiments.

[0023] Reference Figure 1-5 A lifting tool for a generator rotor comprises a crossbeam 1, a pushing mechanism is provided at the bottom of the crossbeam 1, a pushing block 4 is connected to the pushing mechanism, a mounting plate 7 is installed at the bottom of the pushing block 4, a T-slot 8 is provided at the bottom of the mounting plate 7, a T-block 9 is slidably installed in the T-slot 8, a rear end winding mechanism is provided at the bottom of the T-block 9, a push rod motor 10 is installed on the left side of the mounting plate 7, the output shaft of the push rod motor 10 is connected to the T-block 9, two welding rods 17 are installed at the bottom of the mounting plate 7, the bottom of the two welding rods 17 are connected to the same stabilizing plate 21, two telescopic rods 24 are slidably installed on the stabilizing plate 21, a screw mechanism is provided at the bottom of the mounting plate 7, the telescopic rod 24 is connected to the corresponding screw mechanism, a connecting piece 18 is installed at the bottom of the two telescopic rods 24, and a connecting mechanism is provided at the bottom of the two connecting pieces 18.

[0024] Reference Figure 1In this embodiment, the pushing mechanism includes a motor 2 and a threaded rod 3. A pushing groove 6 is provided at the bottom of the crossbeam 1. The pushing block 4 is slidably installed in the pushing groove 6. The threaded rod 3 is rotatably installed in the pushing groove 6. The pushing block 4 is threadedly connected to the outside of the threaded rod 3. The motor 2 is embedded in the inner wall of the pushing groove 6. The output shaft of the motor 2 is connected to the threaded rod 3. A support rod 5 is fixedly installed in the pushing groove 6. The pushing block 4 is slidably installed on the outside of the support rod 5; the motor 2 drives the threaded rod 3 to rotate, and the threaded rod 3 drives the pushing block 4 to push in the installation direction, so that the rotor can be pushed forward into the generator shell, which can improve work efficiency. The support rod 5 is provided to support the pushing block 4, including the pushing block 4 sliding in the pushing groove 6.

[0025] Reference Figure 2 In this embodiment, the rear end winding mechanism includes a fixed box 11, which is installed at the bottom of the T-block 9. A winding shaft 12 is rotatably installed in the fixed box 11, and two winding wheels 25 are installed on the outside of the winding shaft 12. Steel wire ropes 13 are provided on the outside of the two winding wheels 25. Hooks 15 are provided at the bottom of the two steel wire ropes 13. A servo motor 14 is installed on the outside of the fixed box 11, and the output shaft of the servo motor 14 is connected to the end of the winding shaft 12. A through hole is opened at the bottom of the fixed box 11, and the steel wire rope 13 is movably connected to the through hole; the servo motor 14 drives the two winding wheels 25 to rotate through the winding shaft 12, and the two winding wheels 25 reel in the two steel wire ropes 13, so that the rear end of the rotor can be extracted.

[0026] Reference Figure 1 and Figure 3 In this embodiment, the screw mechanism includes a worm motor 16, which is embedded in the bottom of the mounting plate 7. A screw 20 is installed on the output shaft of the worm motor 16, and a screw groove 23 is opened at the top of the telescopic rod 24. The screw 20 is threadedly connected to the screw groove 23; the worm motor 16 drives the two screws 20 to rotate, and the screw 20 drives the telescopic rod 24 to move upward through the screw groove 23. The two sides are designed to be connected by the screw rods 20, so they can move simultaneously or be controlled separately.

[0027] Reference Figure 3 In this embodiment, two sliding holes 22 are opened on the stabilizing plate 21 , and the telescopic rod 24 is slidably connected to the inner walls of the corresponding sliding holes 22 ; the telescopic rod 24 slides vertically in the sliding holes 22 .

[0028] Reference Figure 4 In this embodiment, the connecting mechanism includes a steel rope 26, the top end of the steel rope 26 is rotatably connected to the connecting member 18, and the bottom end of the steel rope 26 is connected to a U-shaped lock 27; the U-shaped lock 27 can be used to connect to the rotor.

[0029] In this embodiment, the sling is designed to lift a weight of 50 tons, which can greatly save manpower and time. Its superiority is more evident when adjusting the rotor after it is pulled out of the center, lifting the center of gravity, and installing the bearings in cooperation with the maintenance staff after the rotor is inserted.

[0030] Working principle: when in use, set the crossbeam 1 on the beam, and the size of the crossbeam 1 can be set according to the beam, connect the external power supply and control switch, first set two steel wires on the front end of the rotor, then use the U-shaped lock 27 to connect the steel wires, use two hooks 15 to connect the rear end of the rotor, use the push rod motor 10 to push the T-block 9 to move, the T-block 9 drives the rear end winding mechanism to move, and the position of the two steel ropes 13 and the two hooks 15 can be adjusted. Start the servo motor 14 to drive the two winding wheels 25 to rotate through the winding shaft 12, and the two winding wheels 25 reel in the two steel ropes 13. The rear end of the rotor is extracted, and two worm motors 16 are used to drive the two screws 20 to rotate. The screw 20 drives the telescopic rod 24 to move upward through the screw slot 23. The two telescopic rods 24 drive the front end of the rotor to move upward through two steel ropes 26 and two U-shaped locks 27. Then the rotor is aligned and installed. The design of the screw rods 20 on both sides can move simultaneously or be controlled separately, and can be fine-tuned to facilitate alignment and installation; the motor 2 drives the threaded rod 3 to rotate, and the threaded rod 3 drives the pushing block 4 to push in the direction of installation, so that the rotor can be pushed forward into the generator shell, which can improve work efficiency.

[0031] The above is only a preferred specific implementation method of this embodiment, but the protection scope of this embodiment is not limited to this. Any technician familiar with this technical field can make equivalent replacements or changes based on the technical solution and inventive concept of this embodiment within the technical scope disclosed in this embodiment, and they should be covered by the protection scope of this embodiment.

Claims

1. A lifting tool for a generator rotor, comprising a crossbeam (1), characterized in that: The bottom of the crossbeam (1) is provided with a pushing mechanism, a pushing block (4) is connected to the pushing mechanism, a mounting plate (7) is installed at the bottom of the pushing block (4), a T-shaped slot (8) is provided at the bottom of the mounting plate (7), a T-shaped block (9) is slidably installed in the T-shaped slot (8), a rear end winding mechanism is provided at the bottom of the T-shaped block (9), a push rod motor (10) is installed on the left side of the mounting plate (7), an output shaft of the push rod motor (10) is connected to the T-shaped block (9), two welding rods (17) are installed at the bottom of the mounting plate (7), the bottoms of the two welding rods (17) are connected to the same stabilizing plate (21), two telescopic rods (24) are slidably installed on the stabilizing plate (21), a screw mechanism is provided at the bottom of the mounting plate (7), the telescopic rods (24) are connected to the corresponding screw mechanism, the bottoms of the two telescopic rods (24) are both provided with connecting pieces (18), and the bottoms of the two connecting pieces (18) are provided with a connecting mechanism; The pushing mechanism comprises a motor (2) and a threaded rod (3); a pushing groove (6) is provided at the bottom of the crossbeam (1); a pushing block (4) is slidably mounted in the pushing groove (6); the threaded rod (3) is rotatably mounted in the pushing groove (6); the pushing block (4) is threadedly connected to the outer side of the threaded rod (3); the motor (2) is embedded in the inner wall of the pushing groove (6); and the output shaft of the motor (2) is connected to the threaded rod (3); The rear end winding mechanism comprises a fixed box (11), the fixed box (11) is mounted at the bottom of the T-shaped block (9), a winding shaft (12) is rotatably mounted in the fixed box (11), two winding wheels (25) are mounted on the outside of the winding shaft (12), steel wire ropes (13) are arranged on the outside of the two winding wheels (25), and hooks (15) are arranged at the bottom of the two steel wire ropes (13); The screw mechanism comprises a worm motor (16), the worm motor (16) is embedded in the bottom of the mounting plate (7), a screw (20) is mounted on the output shaft of the worm motor (16), a screw groove (23) is provided on the top of the telescopic rod (24), and the screw (20) is threadedly connected to the screw groove (23).

2. A lifting tool for a generator rotor according to claim 1, characterized in that: A support rod (5) is fixedly installed in the pushing groove (6), and the pushing block (4) is slidably installed on the outside of the support rod (5).

3. A generator rotor lifting tool according to claim 1, characterized in that: A servo motor (14) is installed outside the fixed box (11), and the output shaft of the servo motor (14) is connected to the end of the winding shaft (12). A through hole is opened at the bottom of the fixed box (11), and the steel wire rope (13) is movably connected to the through hole.

4. A lifting tool for a generator rotor according to claim 1, characterized in that: Two sliding holes (22) are provided on the stabilizing plate (21), and the telescopic rod (24) is slidably connected to the inner walls of the corresponding sliding holes (22).

5. A generator rotor lifting tool according to claim 1, characterized in that: The connecting mechanism comprises a steel rope (26), the top end of the steel rope (26) is rotatably connected to the connecting piece (18), and the bottom end of the steel rope (26) is connected to a U-shaped lock (27).

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