Rotor dismounting tool with multiple hoisting positions

Abstract

The invention relates to the field of generators. The multi-hoisting-position rotor disassembling and assembling tool comprises a first retaining ring arranged at the right end of a rotor in a sleeving mode, the right end of the first retaining ring is connected with a collecting ring or an exciter through a bearing, and the multi-hoisting-position rotor disassembling and assembling tool further comprises a second retaining ring arranged at the left end of the rotor in a sleeving mode; the left end of the second retaining ring is connected with an extension shaft through a bearing; the extension shaft comprises a first extension shaft, at least one second extension shaft and a third extension shaft; the right end of the second extension shaft is provided with a first flange and is connected with a first extension shaft through the first flange, and the left end of the second extension shaft is provided with a second flange and is connected with another second extension shaft or a third extension shaft through the second flange; a third flange matched with the second flange is arranged at the right end of the third extension shaft, and a lifting ring is arranged at the left end of the third extension shaft; the first flange, the second flange and the third flange are all connected with reinforcing plates, the reinforcing plates are arranged at equal intervals in a surrounding mode with the central axis of the extension shaft as the center line, and open holes are formed in the reinforcing plates. The requirements of stators with different lengths can be met, and meanwhile the hoisting position is more flexible.

Description

Technical Field

[0001] The invention relates to the field of generators, and in particular to a rotor disassembly and assembly tool. Background Art

[0002] When the rotor of a large generator is installed and removed horizontally from the stator, the rotor needs to be lifted and then inserted into the stator. Existing disassembly and removal tools have limited lifting positions and cannot meet the lifting requirements of stators of different lengths and different inclination angles. Summary of the invention

[0003] In view of the above problems existing in the prior art, the present invention is proposed.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] A rotor disassembly and assembly tool with multiple lifting positions, comprising a first guard ring sleeved on the right end of the rotor, the right end of the first guard ring being connected to a collector ring or an exciter through a bearing, and also comprising a second guard ring sleeved on the left end of the rotor;

[0006] The left end of the second guard ring is connected to an extension shaft through a bearing, and the extension shaft includes a first extension shaft, at least one second extension shaft, and a third extension shaft;

[0007] The right end of the second extension shaft is provided with a first flange, and is connected to the first extension shaft through the first flange; the left end of the second extension shaft is provided with a second flange, and is connected to another second extension shaft or a third extension shaft through the second flange;

[0008] The right end of the third extension shaft is provided with a third flange matching the second flange, and the left end of the third extension shaft is provided with the lifting ring;

[0009] The first flange, the second flange, and the third flange are all connected with reinforcement plates, the reinforcement plates are arranged around the central axis of the extension shaft at equal intervals, and the reinforcement plates are provided with openings.

[0010] The present invention is provided with an additional extension shaft, and the number of the second extension shafts can be increased or decreased according to the length of the rotor and the stator, thereby changing the total length of the extension shafts, thereby meeting the requirements of stators of different lengths. The present invention also provides an additional opening on the reinforcing plate, and the opening can be used as a lifting position, thereby increasing the lifting points, making the lifting position of the rotor more flexible, thereby increasing the flexibility of the rotor and stator assembly.

[0011] The first guard ring and the second guard ring are provided with an annular groove with an opening facing outward, and the plane where the annular groove is located is perpendicular to the central axis of the rotor. When in use, in addition to the lifting ring, the annular groove can also be used as a lifting position, thereby increasing the lifting points and making the lifting position of the rotor more flexible, thereby increasing the flexibility of the rotor and stator assembly.

[0012] The distances from the openings of the reinforcing plates connected to the same flange to the central axis of the extension shaft are different, so that different hoisting heights can be selected to adjust the inclination angle of the extension shaft and further adjust the inclination angle of the rotor.

[0013] The outer diameter of the side of the guard ring away from the rotor is smaller than the outer diameter of the side of the guard ring close to the rotor. A fan is sleeved on the side of the guard ring away from the rotor, and the outer diameter of the fan is not greater than the outer diameter of the side of the guard ring close to the rotor. The guard ring of the present invention is connected outwardly through a bearing so that the rotor can rotate, thereby allowing the assembled rotor and stator to be tested. The fan outside the guard ring can effectively improve the heating of the rotor and stator during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. 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 creative labor. Among them:

[0015] Figure 1 A schematic diagram of the rotor stator assembly structure of a rotor disassembly and assembly tool with multiple lifting positions according to an embodiment of the present invention;

[0016] Figure 2 A schematic diagram of a rotor hoisting structure of a rotor disassembly and assembly tool with multiple hoisting positions according to an embodiment of the present invention;

[0017] Figure 3 A rotor disassembly and assembly tool with multiple lifting positions according to an embodiment of the present invention Figure 1 Schematic diagram of the cross-sectional structure at AA;

[0018] Figure 4 It is a schematic diagram of the structure on the left side of the second extended axis;

[0019] Figure 5 It is a schematic diagram of the structure on the right side of the second extended axis. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more understandable, the specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings.

[0021] Reference Figure 1-Figure 5 The rotor disassembly and assembly tool with multiple lifting positions includes a first guard ring 11 sleeved on the right end of the rotor 1, the right end of the first guard ring 11 is connected to a collector ring or an exciter 3 through a bearing, and also includes a second guard ring 12 sleeved on the left end of the rotor 1.

[0022] The left end of the second guard ring 12 is connected to the extension shaft 4 through a bearing, and a lifting ring 432 is provided on the left end surface of the extension shaft 4.

[0023] The present invention is additionally provided with an extension shaft 4, and the rotor 1 can be hoisted by using the extension shaft 4, thereby solving the problem that the end of the rotor 1 shaft cannot pass through the stator 2, resulting in difficulty in hoisting.

[0024] The first guard ring 11 and the second guard ring 12 are provided with an annular groove with an opening facing outward, and the plane where the annular groove is located is perpendicular to the central axis of the rotor 1. When in use, in addition to the lifting ring 432, the annular groove can also be used as a lifting position, thereby increasing the lifting points, making the lifting position of the rotor 1 more flexible, thereby increasing the flexibility of the rotor 1 and the stator 2 when assembling.

[0025] The outer diameter of the side of the guard ring away from the rotor 1 is smaller than the outer diameter of the side of the guard ring close to the rotor 1. A fan is sleeved on the side of the guard ring away from the rotor 1, and the outer diameter of the fan is not greater than the outer diameter of the side of the guard ring close to the rotor 1. The guard ring of the present invention is connected outwardly through a bearing so that the rotor 1 can rotate, thereby allowing the assembled rotor 1 and stator 2 to be tested, and the fan outside the guard ring can effectively improve the heating of the rotor 1 and stator 2 during the test.

[0026] The extension shaft 4 is a hollow extension shaft 4 , which reduces the weight of the extension shaft 4 and reduces the impact on the center of gravity of the rotor 1 .

[0027] When in use, the rotor 1 is first lifted from the center of gravity, and then the rotor 1 is inserted into the stator 2. The extension drawer can be extended from the stator 2, so that the rotor 1 can be supported or lifted from both ends of the rotor 1. The lifting device at the center of gravity of the rotor 1 can be removed to facilitate the complete insertion of the rotor 1 into the stator 2, thereby facilitating the assembly and disassembly of the rotor 1; after the rotor 1 is inserted into the stator 2, the annular groove can also be used as a lifting position, thereby increasing the lifting points, making the lifting position of the rotor 1 more flexible, thereby increasing the flexibility when assembling the rotor 1 and the stator 2.

[0028] Reference Figure 2 and Figure 3 The extension shaft 4 includes a first extension shaft 41, at least one second extension shaft 42, and a third extension shaft 43;

[0029] The right end of the first extension shaft 41 is connected to the second retaining ring 12 through a bearing, and the left end of the first extension shaft 41 is provided with an outward flange 411, and at least 8 bolt holes are opened on the flange 411 at equal intervals;

[0030] A first flange 421 is provided at the right end of the second extension shaft 42, and is connected to the first extension shaft 41 through the first flange 421; a second flange 422 is provided at the left end of the second extension shaft 42, and is connected to another second extension shaft 42 or the third extension shaft 43 through the second flange 422;

[0031] A third flange 431 matching the second flange 422 is disposed at the right end of the third extension shaft 43 , and a lifting ring 432 is disposed at the left end of the third extension shaft 43 .

[0032] The present invention optimizes the structure of the extension shaft 4. When in use, the number of the second extension shafts 42 can be increased or decreased according to the conditions of the rotor 1 and the stator 2, thereby changing the total length of the extension shaft 4 to meet different lifting requirements.

[0033] The first flange 421 , the second flange 422 , and the third flange 431 are all connected with reinforcing plates 44 , which are arranged around the central axis of the extension shaft 4 at equal intervals, so as to increase the strength of the extension shaft 4 by using the reinforcing plates 44 .

[0034] The reinforcing plate 44 is provided with an opening 441. The opening 441 can be used as a lifting position, thereby increasing the lifting points, making the lifting position of the rotor 1 more flexible, thereby increasing the flexibility when assembling the rotor 1 and the stator 2.

[0035] The distances from the openings 441 of the reinforcing plates 44 connected to the same flange to the central axis of the extension shaft 4 are different, so that different hoisting heights can be selected to adjust the inclination angle of the extension shaft 4 and further adjust the inclination angle of the rotor 1 .

[0036] The reinforcing plate 44 is welded to the extension shaft 4, and the height of the reinforcing plate 44 increases as it is closer to the connected flange. The present invention selects the connection relationship between the reinforcing plate 44 and the extension shaft 4, and optimizes the structure of the reinforcing plate 44, which can greatly increase the connection strength between the reinforcing plate 44 and the extension shaft 4, and greatly increase the connection strength between the extension shafts 4.

[0037] When in use, the number of second extension shafts 42 can be increased or decreased according to the conditions of the rotor 1 and the stator 2, thereby changing the total length of the extension shaft 4, thereby meeting different lifting requirements, and using the reinforcing plate 44 to increase the strength of the extension shaft 4, avoiding the bending of the extension shaft 4 and affecting the assembly accuracy of the rotor 1 and the stator 2. The openings 441 of the reinforcing plates 44 connected to the same flange have different distances from the central axis of the extension shaft 4. Thus, different lifting heights can be selected to adjust the inclination angle of the extension shaft 4, and then adjust the inclination angle of the rotor 1.

[0038] Regarding the above two embodiments, the second extended shaft includes a cylindrical shaft 423, the left end of the shaft 423 is provided with a second flange 422 extending outward, and the second flange 422 is provided with first bolt holes 453 at equal intervals; the right end of the shaft 423 is provided with a first flange 421 extending outward, and the first flange 421 is provided with a second bolt hole 461 at a position directly opposite to the first bolt hole 453, and the distance from the second bolt hole 461 to the center axis 423 line of the shaft 423 is equal to the distance from the first bolt hole 453 to the shaft 423, and the left end surface of the shaft 423 is provided with a first groove 454 recessed inwardly, and the right end surface of the shaft 423 is provided with a first protrusion 462 protruding outwardly, and the outer contour of the first protrusion 462 matches the inner contour of the first groove 454.

[0039] First, when the length of the rotor lifting tool is not enough, the present invention can be used to connect the existing rotor lifting tool to increase the length of the rotor lifting tool. Secondly, the present invention can realize the connection between the second extension shaft 423 and the second extension shaft 423 through the flange and the bolt hole. Thereby, the length of the final rotor lifting tool can be selected by selecting the number of the second extension shafts 423 connected, thereby meeting different lifting requirements. Then, the present invention provides a first groove 454 on the left end face of the shaft 423 and a first protrusion 462 on the right end face. The first protrusion 462 can be inserted into the first groove 454, so that when the two second extension shafts 423 are connected to each other, the structural strength of the connection is increased.

[0040] The bottom of the first groove 454 is connected with a second protrusion 455 protruding outward, the first protrusion 462 is provided with a second groove 463 recessed inward, and the outer contour of the second protrusion 455 matches the inner contour of the second groove 463. Thus, the second groove 463 and the second protrusion 455 further increase the connection strength between the rotor hoisting and the follow-up shaft 423.

[0041] The second protrusion 455 is in a conical column shape, and the first protrusion 462 is in a polygonal shape. Thus, the second protrusion 455 is used to guide the direction of the second extension shaft 423, and the first protrusion 462 is used to limit the relative position between the two second extension shafts 423 to prevent the two from rotating relative to each other.

[0042] The distance from the outer edge of the first flange 421 to the center axis 423 of the shaft 423 is greater than the distance from the outer edge of the second flange 422 to the center axis 423 of the shaft 423. The first flange 421 is also provided with a third bolt hole 464, and the distance from the third bolt hole 464 to the center axis 423 of the shaft 423 is greater than the distance from the second bolt hole 461 to the center axis 423 of the shaft 423. Thus, the first flange 421 and the third bolt hole 464 can be used to dock with non-second extended shafts 423, or with existing rotor hoisting tools of different sizes, to meet more usage requirements.

[0043] When in use, first lift the rotor from the center of gravity, then insert the rotor into the stator, the shaft 423 connected to the rotor can extend from the stator, so that the rotor can be supported or lifted from both ends of the rotor, and the lifting device at the center of gravity of the rotor can be removed, so that when the length of the rotor lifting tool is not enough, the shaft 423 can be used to connect the existing rotor lifting tool to increase the length of the rotor lifting tool; by selecting the number of second extension shafts 423 connected, the length of the final rotor lifting tool can be selected to meet different length lifting requirements.

[0044] A first reinforcing plate 451 is provided at an equal distance between the second flange 422 and the shaft 423, a second reinforcing plate 452 is provided at an equal distance between the first flange 421 and the shaft 423, a first opening 471 is provided on the first reinforcing plate 451, and a second opening 472 is provided on the second reinforcing plate 452. Thus, the strength of the shaft 423 is increased by using the reinforcing plate, and the opening is allowed to be used as a hoisting point, so that the hoisting position of the rotor is more flexible.

[0045] The distances from the first openings 471 on each first reinforcing plate 451 to the central axis 423 of the shaft 423 are different, and the distances from the second openings 472 on each second reinforcing plate 452 to the central axis 423 of the shaft 423 are different. This allows different hanging points to be selected to adjust the hanging height of the second extension shaft 423.

[0046] A first bolt hole 453 is provided between two adjacent first reinforcing plates 451 , and a second bolt hole 461 is provided between two adjacent second reinforcing plates 452 , so as to ensure structural strength.

[0047] The first reinforcing plate 451 and the second reinforcing plate 452 are opposite to each other, and the distance from the first opening 471 on the first reinforcing plate 451 to the central axis 423 of the shaft 423 is equal to the distance from the second opening 472 on the second reinforcing plate 452 opposite to the first reinforcing plate 451 to the central axis 423 of the shaft 423. Therefore, when the openings on the two opposite reinforcing plates are selected for hoisting, the central axis 423 of the shaft 423 is located in the horizontal direction.

[0048] When in use, the first reinforcing plate 451 and the second reinforcing plate 452 are used to increase the strength of the shaft 423 , and the opening is allowed to be used as a lifting point, so that the lifting position of the rotor is more flexible. Different lifting points of different reinforcing plates can be selected to adjust the lifting height of the second extended shaft 423 .

[0049] It should be noted that the above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A rotor disassembly and assembly tool with multiple lifting positions, comprising a first guard ring sleeved on the right end of the rotor, the right end of the first guard ring being connected to a collector ring or an exciter through a bearing, and also comprising a second guard ring sleeved on the left end of the rotor; The left end of the second guard ring is connected to an extension shaft through a bearing, and the extension shaft includes a first extension shaft, at least one second extension shaft, and a third extension shaft; The right end of the second extension shaft is provided with a first flange, and is connected to the first extension shaft through the first flange; the left end of the second extension shaft is provided with a second flange, and is connected to another second extension shaft or a third extension shaft through the second flange; The right end of the third extension shaft is provided with a third flange matching the second flange, and the left end of the third extension shaft is provided with the lifting ring; The first flange, the second flange, and the third flange are all connected with reinforcement plates, the reinforcement plates are arranged around the central axis of the extension shaft at equal intervals, and the reinforcement plates are provided with openings.

2. The rotor disassembly and assembly tool with multiple lifting positions according to claim 1, characterized in that: The first guard ring and the second guard ring are provided with an annular groove opening outward, and the plane where the annular groove is located is perpendicular to the central axis of the rotor.

3. The rotor disassembly and assembly tool with multiple lifting positions according to claim 2, characterized in that: The distances from the openings of the reinforcing plates connected to the same flange to the central axis of the extended shaft are different.

4. The rotor disassembly and assembly tool with multiple lifting positions according to claim 3, characterized in that: The outer diameter of the side of the guard ring away from the rotor is smaller than the outer diameter of the side of the guard ring close to the rotor. A fan is sleeved on the side of the guard ring away from the rotor, and the outer diameter of the fan is not larger than the outer diameter of the side of the guard ring close to the rotor.

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