Generator rotor retaining ring dismounting tool

Abstract

The utility model belongs to the technical field of generator maintenance tools, and particularly relates to a generator rotor retaining ring dismounting tool which comprises a fixed clamp fixed on a generator rotor and a movable clamp movably arranged on the generator rotor. The movable clamp comprises two first semi-rings, one ends of the two first semi-rings are hinged together, the other ends of the two first semi-rings are movable ends, the first semi-rings are arranged on a generator rotor in a sleeving mode and tightly hold the generator rotor, the movable clamp comprises two second semi-rings, one ends of the two second semi-rings are hinged together, and the other ends of the two second semi-rings are movable ends; the generator rotor is sleeved with the second semi-ring, the inner diameter of the second semi-ring is larger than the diameter of the generator rotor, one side of the second semi-ring abuts against the protective ring, the movable end of the first semi-ring and the movable end of the second semi-ring are each provided with a locking assembly, and a jacking assembly used for pushing the movable clamp is arranged between the fixed clamp and the movable clamp. The jack pushes the movable clamp to move, and the movable clamp pushes the retaining ring to move, so that the retaining ring is detached.

Description

Technical Field

[0001] The utility model belongs to the technical field of generator maintenance tooling, in particular to a generator rotor guard ring disassembly tooling. Background Art

[0002] As power plant generators age, rotor winding insulation pads may become loose or even fall off, compromising safe and stable operation. Therefore, it's necessary to remove the rotor retaining ring before inspecting the rotor. However, due to the large size, thick outer wall, and interference fit of the rotor retaining ring, removing the retaining ring is challenging. Utility Model Content

[0003] In order to solve the problems in the above-mentioned background technology, the utility model provides a generator rotor guard ring disassembly tool, which drives the movable clamp to move by a jack, and the movable clamp drives the guard ring to move, thereby removing the guard ring, reducing the difficulty of disassembling the guard ring and improving work efficiency.

[0004] The utility model provides a generator rotor guard ring disassembly tool for disassembling the guard ring at the end of the generator rotor, comprising a fixed clamp fixed on the generator rotor and a movable clamp movably arranged on the generator rotor, the fixed clamp comprising two first half rings, one end of the two first half rings being hinged together and the other end being a movable end, the first half ring being sleeved on the generator rotor and holding the generator rotor tightly, the movable clamp comprising two second half rings, one end of the two second half rings being hinged together and the other end being a movable end, the second half ring being sleeved on the generator rotor and having an inner diameter larger than the diameter of the generator rotor, one side of the second half ring being pressed against the guard ring, the movable end of the first half ring and the movable end of the second half ring being both provided with a locking assembly, and a jacking assembly for pushing the movable clamp being provided between the fixed clamp and the movable clamp.

[0005] Furthermore, the jacking assembly is set into two groups and is located on both sides of the fixing fixture. The jacking assembly includes a first fixed block fixed on the first half ring and a second fixed block fixed on the second half ring. A limiting cylinder is provided on the first fixed block, and a jack is inserted in the limiting cylinder. A limiting groove is provided on the second fixed block, and the piston rod of the jack is inserted in the limiting groove.

[0006] Furthermore, an operating frame is provided between the two jacks, and the operating frame includes a connecting rod. Both ends of the connecting rod are provided with sleeves, and the sleeves are sleeved on the handles of the jacks. An operating rod is also provided on the connecting rod.

[0007] Furthermore, a plurality of receiving grooves are provided on the inner wall of the limiting cylinder in the circumferential direction, and a tightening block is movably provided in the receiving groove. A spring is provided between the tightening block and the bottom of the receiving groove. The tightening block presses the jack under the action of the spring, and the side of the tightening block close to the opening of the limiting cylinder is provided with an inclined surface for facilitating the insertion of the jack.

[0008] Furthermore, the locking assembly includes two locking plates, which are respectively fixed on the movable ends of the two first half rings. A locking groove is opened in the locking plate. A threaded rod is rotatably connected to one locking plate, and the threaded rod is movably set in the locking groove of the other locking plate. A locking nut is threadedly connected to the threaded rod, and the locking nut presses the locking plate.

[0009] Furthermore, a lever is provided on the locking nut to facilitate the rotation of the locking nut.

[0010] Furthermore, a buffer pad is provided on the inner wall of the first half ring, and the buffer pad presses against the generator rotor.

[0011] Furthermore, a plurality of rollers are provided on the inner wall of the second half ring along the circumferential direction, and the rollers roll on the generator rotor.

[0012] Furthermore, a heat insulating pad is provided on a side of the second half ring close to the guard ring, and the heat insulating pad abuts against the guard ring.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] (1) The movable clamp is pushed to move by the jack, and the movable clamp then pushes the guard ring to move, thereby realizing the removal of the guard ring, reducing the difficulty of removing the guard ring and improving work efficiency.

[0015] (2) Both the fixed fixture and the movable fixture are detachably mounted on the generator rotor through a locking assembly, which facilitates the installation and removal of the fixed fixture and the movable fixture.

[0016] (3) The operating frame can operate two jacks at the same time, thereby ensuring that the jacks on both sides are lifted synchronously. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic diagram of the overall structure of a generator rotor retaining ring removal tool;

[0019] Figure 2It is a structural diagram of the movable fixture;

[0020] Figure 3 It is a cross-sectional view of the internal structure of the limiting cylinder;

[0021] Explanation of the accompanying drawings: 1. Generator rotor; 2. Guard ring; 3. Fixing fixture; 30. First half ring; 31. Buffer pad; 4. Movable fixture; 40. Second half ring; 41. Roller; 42. Insulation pad; 5. Locking assembly; 50. Locking plate; 51. Locking groove; 52. Threaded rod; 53. Locking nut; 54. Drive rod; 6. Lifting assembly; 60. First fixed block; 61. Second fixed block; 610. Limiting groove; 62. Limiting cylinder; 620. Accommodating groove; 621. Tightening block; 622. Spring; 63. Jack; 7. Operating frame; 70. Connecting rod; 71. Sleeve; 72. Operating rod. DETAILED DESCRIPTION

[0022] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] The following is combined with Figure 1 To the attached Figure 3 And specific embodiments discuss the present invention in detail.

[0024] Reference Figure 1-3 The present invention provides a generator rotor retaining ring removal tool for removing retaining rings 2 from the ends of a generator rotor 1. Retaining rings 2 are fixed to both ends of the generator rotor 1. The tool comprises a fixed fixture 3 fixed to the generator rotor 1 and a movable fixture 4 movably disposed on the generator rotor 1. The fixed fixture 3 is fixed in the middle of the generator rotor 1, and the movable fixture 4 is located between the fixed fixture 3 and the retaining ring 2.

[0025] The fixing clamp 3 includes two first half rings 30, one end of the two first half rings 30 is hinged to each other, and the other end of the first half ring 30 is a movable end. The two first half rings 30 can form a complete ring and are sleeved on the generator rotor 1. A buffer pad 31 is fixedly connected to the inner wall of the first half ring 30. When the two first half rings 30 hold the generator rotor 1 tightly, the buffer pad 31 presses against the generator rotor 1. The buffer pad 31 can not only reduce the damage of the first half ring 30 to the generator rotor 1, but also increase the friction between the first half ring 30 and the generator rotor 1, so that the fixing clamp 3 is stably fixed on the generator rotor 1.

[0026] The movable clamp 4 includes two second half rings 40, one end of the two second half rings 40 is hinged to each other, and the other end of the second half ring 40 is a movable end. The two second half rings 40 can form a complete ring and are sleeved on the generator rotor 1. The inner diameter of the second half ring 40 is larger than the diameter of the generator rotor 1, so that the second half ring 40 can move on the generator rotor 1. A plurality of rollers 41 are provided on the inner wall of the second half ring 40 along the circumferential direction. The rollers 41 roll on the generator rotor 1. When the movable clamp 4 moves, the second half ring 40 is moved by the rollers The column 41 moves on the generator rotor 1, thereby reducing the friction between the second half ring 40 and the generator rotor 1 and reducing damage to the generator rotor 1; a thermal insulation pad 42 is fixedly connected to the side of the second half ring 40 close to the protective ring 2, and the second half ring 40 is in contact with the protective ring 2 through the thermal insulation pad 42. Since there is an interference fit between the protective ring 2 and the generator rotor 1, it is more convenient to heat the protective ring 2 and then remove it. The thermal insulation pad 42 can isolate the heat of the protective ring 2, thereby reducing thermal damage to the second half ring 40 and extending the service life of the second half ring 40.

[0027] A locking assembly 5 is provided at the movable end of the first half ring 30 and the movable end of the second half ring 40. The locking assembly 5 on the first half ring 30 is used as an example for explanation below. The locking assembly 5 includes two locking plates 50, which are respectively fixedly connected to the movable ends of the two first half rings 30. A U-shaped locking groove 51 is provided in the two locking plates 50. A threaded rod 52 is rotatably connected to one of the locking plates 50, and the threaded rod 52 is movably set in the locking groove 51 of the other locking plate 50. A locking nut 53 is threadedly connected to the threaded rod 52, and the locking nut 53 presses the locking plate 50, thereby locking the two first half rings 30 together; two shift rods 54 are fixedly connected to the locking nut 53, and the shift rod 54 facilitates the staff to manually rotate the locking nut 53.

[0028] A jacking assembly 6 for pushing the movable clamp 4 is provided between the fixed clamp 3 and the movable clamp 4. The jacking assembly 6 is provided in two groups and is located on both sides of the fixed clamp 3. The jacking assembly 6 includes a first fixed block 60 fixed on the outer wall of the first half ring 30 and a second fixed block 61 fixed on the outer wall of the second half ring 40. A limiting cylinder 62 is fixedly connected to the end face of the first fixed block 60 facing the second fixed block 61, a jack 63 is inserted in the limiting cylinder 62, a limiting groove 610 is opened in the second fixed block 61, and the piston rod of the jack 63 is inserted in the limiting groove 610.

[0029] Specifically, a plurality of receiving grooves 620 are circumferentially provided on the inner wall of the limiting cylinder 62, and a tightening block 621 is movably provided in the receiving groove 620. A spring 622 is provided between the tightening block 621 and the bottom of the receiving groove 620. The tightening block 621 presses against the jack 63 under the elastic action of the spring 622, thereby further improving the stability of the jack 63; the side of the tightening block 621 close to the opening of the limiting cylinder 62 is provided with an inclined surface for facilitating the insertion of the jack 63. When the jack 63 is inserted into the limiting cylinder 62, the jack 63 pushes the tightening block 621 to move toward the inside of the receiving groove 620 through the inclined surface.

[0030] An operating frame 7 is provided between the two jacks 63. The operating frame 7 includes a connecting rod 70. Sleeves 71 are fixedly connected to both ends of the connecting rod 70. The sleeve 71 is sleeved on the handle of the jack 63. An operating rod 72 is fixedly connected to the middle position of the connecting rod 70. The operating frame 7 can operate the two jacks 63 at the same time, thereby ensuring that the jacks 63 on both sides are lifted synchronously.

[0031] The implementation principle of the generator rotor guard ring disassembly tool provided by the utility model is as follows: when disassembling the guard ring 2 on the generator rotor 1, first fix the fixed clamp 3 on the generator rotor 1 through the locking assembly 5, and then put the movable clamp 4 on the generator rotor 1 through the locking assembly 5, and the movable clamp 4 abuts the guard ring 2 through the thermal insulation pad 42, and then insert the jack 63 into the limit cylinder 62, adjust the length of the jack 63 so that the piston rod of the jack 63 is inserted into the limit groove 610 and abuts the second fixed block 61, and then heat the guard ring 2. When heated to 200°C, install the operating frame 7 on the jack 63, and operate the jacks 63 on both sides synchronously. The jack 63 pushes the movable clamp 4 to move, and the movable clamp 4 pushes the guard ring 2 to move, thereby removing the guard ring 2.

[0032] The above further describes the present invention with the help of specific embodiments, but it should be understood that the specific description here should not be construed as limiting the essence and scope of the present invention. Various modifications made to the above embodiments by ordinary technicians in this field after reading this specification are all within the scope of protection of the present invention.

Claims

1. A generator rotor guard ring removal tool, used to remove the guard ring at the end of the generator rotor, characterized in that: It includes a fixed clamp fixed on the generator rotor and a movable clamp movably arranged on the generator rotor, the fixed clamp includes two first half rings, one end of the two first half rings is hinged together and the other end is a movable end, the first half ring is sleeved on the generator rotor and holds the generator rotor tightly, the movable clamp includes two second half rings, one end of the two second half rings is hinged together and the other end is a movable end, the second half ring is sleeved on the generator rotor and the inner diameter is larger than the diameter of the generator rotor, one side of the second half ring is pressed against the guard ring, the movable end of the first half ring and the movable end of the second half ring are both provided with locking assemblies, and a jacking assembly for pushing the movable clamp is provided between the fixed clamp and the movable clamp.

2. The generator rotor retaining ring disassembly tool according to claim 1, characterized in that: The jacking assembly is provided in two groups and is located on both sides of the fixing fixture. The jacking assembly includes a first fixing block fixed on the first half ring and a second fixing block fixed on the second half ring. A limiting cylinder is provided on the first fixing block, and a jack is inserted in the limiting cylinder. A limiting groove is provided on the second fixing block, and a piston rod of the jack is inserted in the limiting groove.

3. The generator rotor retaining ring disassembly tool according to claim 2, characterized in that: An operating frame is provided between the two jacks. The operating frame includes a connecting rod. Both ends of the connecting rod are provided with sleeves. The sleeves are sleeved on the handles of the jacks. An operating rod is also provided on the connecting rod.

4. The generator rotor retaining ring disassembly tool according to claim 2, characterized in that: A plurality of accommodating grooves are provided on the inner wall of the limiting cylinder along the circumferential direction, a tightening block is movably provided in the accommodating groove, a spring is provided between the tightening block and the bottom of the accommodating groove, the tightening block presses the jack under the action of the spring, and the side of the tightening block close to the opening of the limiting cylinder is provided with an inclined surface for facilitating the insertion of the jack.

5. The generator rotor retaining ring disassembly tool according to claim 1, characterized in that: The locking assembly includes two locking plates, which are respectively fixed on the movable ends of the two first half rings. Locking grooves are provided in the locking plates. A threaded rod is rotatably connected to one locking plate, and the threaded rod is movably set in the locking groove of the other locking plate. A locking nut is threadedly connected to the threaded rod, and the locking nut presses the locking plate.

6. The generator rotor retaining ring disassembly tool according to claim 5, characterized in that: The locking nut is provided with a shifting rod for facilitating the rotation of the locking nut.

7. The generator rotor retaining ring disassembly tool according to claim 1, characterized in that: A buffer pad is provided on the inner wall of the first half ring, and the buffer pad is pressed against the generator rotor.

8. The generator rotor retaining ring disassembly tool according to claim 1, characterized in that: A plurality of rollers are circumferentially arranged on the inner wall of the second half ring, and the rollers roll on the generator rotor.

9. The generator rotor retaining ring disassembly tool according to claim 1, characterized in that: A heat insulating pad is provided on a side of the second half ring close to the guard ring, and the heat insulating pad abuts against the guard ring.

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