A motor rotor disassembly lifting tool

Abstract

This utility model relates to a motor rotor disassembly lifting device, including an upper balance beam, a lower balance beam, an electric hoist, a first reversing wheel, a second reversing wheel, and slings. The upper balance beam is hoisted and connected to the overhead crane hook via a lifting assembly. Electric hoists are fixedly connected to both ends of the upper balance beam. The lower balance beam is fixedly connected to the upper balance beam and is distributed parallel to it directly below the upper balance beam, maintaining a distance from it. First reversing wheels are fixedly connected to both ends of the lower balance beam. Two sets of adjusting seats are symmetrically arranged on the lower surface of the middle part of the lower balance beam. The adjusting seats are adjustable in the left and right positions on the lower balance beam and can be locked. Each adjusting seat is equipped with a second reversing wheel. Slings are hung on the hooks of the electric hoist. The two sets of slings are sequentially reversed by the first and second reversing wheels and are vertically downward connected to both ends of the rotor. The position of the lifting point can be changed by simply disassembling and adjusting the position of the adjusting seats, avoiding the need to disassemble and adjust the position of the electric hoist.

Description

Technical Field

[0001] This utility model relates to the field of motor maintenance technology, specifically to a motor rotor disassembly lifting tool. Background Technology

[0002] The disassembly and assembly of the motor rotor typically requires the use of an overhead crane, a balance beam, and electric hoists (electric chain hoists, telescopic adjustment units, etc.). Refer to CN114726167A for the large motor rotor extraction device and method. The balance beam is usually suspended from the middle of the overhead crane via a hanging mechanism. Electric hoists are symmetrically positioned at both ends of the balance beam, with two hoists connected to both ends of the rotor via locking mechanisms to level the rotor. Finally, the overhead crane moves along the balance beam to horizontally extract the rotor from the stator.

[0003] The existing technology uses fixed lifting points for the balance beam rotor, with fixed positions and distances between the two lifting points. This technology can only be used for lifting one type of motor rotor and lacks versatility.

[0004] To improve versatility, in some implementations, the electric hoist is moved on the balance beam using drive wheels to change the lifting point position. However, on the one hand, the movement trajectory of the overhead crane and the electric hoist are in the same direction. When the overhead crane moves the overall structure, the electric hoist is prone to displacement along the balance beam. On the other hand, the movements of the electric hoists at both ends are not synchronized, making it difficult to move to a symmetrical position, which makes it difficult for the balance beam to maintain balance.

[0005] In other implementations, to avoid the problem of the electric wheel shifting, the electric hoist is detachably connected to the balance beam. Each time the lifting point position needs to be changed, the electric hoist is manually disassembled and repositioned to adjust the lifting point spacing. While this method avoids the problem of the electric hoist shifting, the large weight of the electric hoist itself (for example, a 2.5-ton rated load electric hoist typically weighs 90–300 kg) makes manual disassembly and assembly in mid-air extremely inconvenient and poses significant safety hazards, resulting in low operational efficiency and high risk.

[0006] Therefore, it is necessary to study a motor rotor disassembly lifting tool. Utility Model Content

[0007] Therefore, the purpose of this utility model is to provide a motor rotor disassembly lifting tool, which can effectively solve the problems of the existing balance beam rotor lifting point being a single fixed point and the existing methods of changing the lifting point having poor stability and cumbersome operation.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A motor rotor disassembly lifting device includes an upper balance beam, a lower balance beam, an electric hoist, a first reversing wheel, a second reversing wheel, and lifting slings; The upper balance beam is hoisted and connected to the overhead crane hook via a hoisting assembly; electric hoists are fixedly connected to both ends of the upper balance beam. The lower balance beam is fixedly connected to the upper balance beam, and the lower balance beam is distributed parallel to the upper balance beam directly below it and maintains a distance from the upper balance beam; both ends of the lower balance beam are fixedly connected to the first reversing wheel. Two sets of adjustment seats are symmetrically arranged on the lower surface of the middle part of the lower balance beam. The adjustment seats are adjustable in the left and right positions on the lower balance beam and can be locked. Each adjustment seat is equipped with a second reversing wheel. Both sets of electric hoists have hooks with slings attached. The slings pass through the first and second reversing wheels in sequence and are vertically connected to both ends of the rotor. The first reversing wheel is located directly below the corresponding electric hoist, so that the upper end of the sling is vertically connected to the hook of the electric hoist.

[0009] Furthermore, the lower balance beam is I-shaped, comprising a fixedly connected upper edge plate, lower edge plate, and web plate; The adjustment seat includes a U-shaped slider and a mounting plate; the upper surface of the mounting plate has U-shaped sliders with opposite openings fixed symmetrically on the front and rear sides, and the two sets of U-shaped sliders are respectively arranged to surround and slide on the front and rear sides of the lower edge plate.

[0010] Furthermore, positioning holes are provided on both the front and rear sides of the lower edge plate, spaced apart in the left-right direction; the adjusting seat is locked to the lower edge plate by means of pins and positioning holes.

[0011] Furthermore, a length adjusting rod is vertically fixed to the lower surface of the adjusting seat, and the second reversing wheel is disposed at the lower end of the length adjusting rod and located on the side close to the first reversing wheel.

[0012] Furthermore, the first reversing wheel is fixedly suspended on the lower surface of the lower balance beam end.

[0013] Furthermore, guide seats are fixedly connected to the side walls at both ends of the lower balance beam, and guide sleeves are vertically fixed to the side of the guide seats away from the lower balance beam, and the slings pass vertically through the guide sleeves.

[0014] Furthermore, the hoisting assembly includes lifting rings and lifting ropes. Two lifting rings are symmetrically fixed on the upper surface of the upper balance beam, and the lifting rings are fixedly connected to the crane hook via the lifting ropes.

[0015] The beneficial effects of the above technical solution are: (1) This utility model features a double-layer structure with upper and lower balance beams. Electric hoists are fixed at both ends of the upper balance beam, and first reversing wheels are fixed at both ends of the lower balance beam. An adjustable and lockable adjusting seat and second reversing wheel are located in the middle of the lower balance beam. The hooks of the electric hoists are vertically connected to the first reversing wheels at both ends of the lower balance beam via slings, and then descend to both ends of the rotor via the second reversing wheel in the middle of the lower balance beam. This allows the position of the lifting point to be changed by simply disassembling and adjusting the position of the adjusting seat, enabling rapid adjustment based on the actual distance between the lifting points at both ends of the rotor of different motor models. This achieves universality and flexible adaptation of the lifting point position. The electric hoist body remains fixed at both ends of the upper balance beam, avoiding the problem of displacement that easily occurs when the electric hoist moves on the balance beam via the drive wheels. Furthermore, it eliminates the need to disassemble and reposition the heavy-duty electric hoist in mid-air, reducing operational risks and improving the safety and applicability of the lifting process.

[0016] (2) The first reversing wheel of this utility model is arranged directly below the hook of the electric hoist. The upper end of the sling is always vertical and connected to the hook of the electric hoist, ensuring that the hook of the electric hoist is always vertically stressed, thereby avoiding the electric hoist hook being subjected to horizontal component force or oblique pull force, ensuring that the electric hoist is always in a vertical motion state during operation, and avoiding the hidden dangers such as chain or wire rope tangling and chain jamming of the electric hoist. Attached Figure Description

[0017] Figure 1 This is a front view schematic diagram of the present utility model; Figure 2 This is a side view assembly drawing of the adjustment seat; Figure 3 This is a top view of the lower edge plate; Figure 4 This is a top view of the guide seat assembly.

[0018] Reference numerals in the attached drawings: 1. Upper balance beam; 2. Lower balance beam; 3. Electric hoist; 4. First reversing wheel; 5. Second reversing wheel; 6. Lifting sling; 7. Lifting assembly; 8. Adjusting seat; 9. Pin; 10. Length adjusting rod; 11. Guide seat; 12. Guide sleeve; 13. Overhead crane hook; 14. Rotor; 15. Stator; 201. Upper edge plate; 202. Lower edge plate; 203. Web plate; 204. Positioning hole; 701. Lifting ring; 702. Lifting rope; 801. U-shaped slider; 802. Mounting plate. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: This embodiment aims to provide a motor rotor dismantling lifting tool, which is mainly used for dismantling large motor rotors. In the existing technology, the balance beam rotor lifting point is single and fixed, and the existing methods of changing the lifting point have problems such as poor stability and cumbersome operation.

[0020] A type of motor rotor disassembly lifting tool, such as Figure 1 The system includes an upper balance beam 1, a lower balance beam 2, an electric hoist 3, a first reversing wheel 4, a second reversing wheel 5, and a sling 6. The upper balance beam 1 is hoisted and connected to the overhead crane hook 13 via a hoisting assembly 7. Specifically, the hoisting assembly 7 includes lifting rings 701 and lifting ropes 702. Two lifting rings 701 are symmetrically fixed on the upper surface of the upper balance beam 1, and the lifting rings 701 are fixedly connected to the overhead crane hook 13 via the lifting ropes 702. The overhead crane is used to hoist the entire hoisting assembly 7 and drive the hoisting assembly 7 and the rotor 14 to move horizontally to remove the rotor 14. The specific structure and method of removing the rotor 14 are based on existing technology and will not be described in detail here. Please refer to CN114726167A for the device and method for removing the rotor 14 of a large electric motor.

[0021] Electric hoists 3 are symmetrically fixed to both ends of the upper balance beam 1 to level the rotor 14, so that the rotor 14 can be smoothly pulled out from the stator 15. In this embodiment, the load of each of the two electric hoists 3 is 2.5t.

[0022] The lower balance beam 2 and the upper balance beam 1 are fixedly connected by welding of the web members. The lower balance beam 2 is distributed parallel to the upper balance beam 1 directly below it and maintains a distance from the upper balance beam 1. The two ends of the lower balance beam 2 are fixedly connected with the first reversing wheel 4. The first reversing wheel 4 is fixedly suspended on the lower surface of the end of the lower balance beam 2.

[0023] Two sets of adjustment seats 8 are symmetrically arranged on the lower surface of the middle part of the lower balance beam 2. The adjustment seats 8 are adjustable in the left and right positions on the lower balance beam 2 and can be locked. Each adjustment seat 8 is equipped with a second reversing wheel 5.

[0024] Specifically, such as Figure 2 The lower balance beam 2 is I-shaped, including a fixedly connected upper edge plate 201, lower edge plate 202, and web plate 203; the adjusting seat includes an integrally formed U-shaped slider and a mounting plate; the second reversing wheel 5 is located below the mounting plate 802, and symmetrically fixed U-shaped sliders 801 with opposing openings are fixed on the front and rear sides of the upper surface of the mounting plate 802. Two sets of U-shaped sliders 801 are respectively arranged around and slide on the front and rear sides of the lower edge plate. (The last sentence appears to be a repetition of the previous one and can be omitted.) Figure 3The lower edge plate 202 has positioning holes 204 spaced apart along the left and right direction on both its front and rear sides. The adjusting seat 8 is locked to the lower edge plate 202 by pins 9 and positioning holes 204. By removing pins 9, the adjusting seat 8 can be adjusted left and right along the lower edge plate 202 via U-shaped slider 801, and then the pins 9 can be reinstalled to lock it in place. The positioning holes 204 also serve as positioning markers. The adjusting seat 8 must be adjusted to match the position of the positioning hole 204 at the target position before it can be locked by pins 9. This ensures that the two sets of adjusting seats 8 maintain symmetrical positions, thus ensuring the balance of the balance beam.

[0025] A length adjustment rod 10 is vertically fixed on the lower surface of the adjustment seat 8 to facilitate the adjustment of the vertical position of the second reversing wheel 5. The second reversing wheel 5 is located at the lower end of the length adjustment rod 10 and is located on the side close to the first reversing wheel 4.

[0026] Both sets of electric hoists have hooks with slings 6 attached. These slings 6 are sequentially reversed by the first reversing wheel 4 and the second reversing wheel 5, and are vertically connected to both ends of the rotor 14. Therefore, the position of the second reversing wheel 5 determines the position of the lifting points on the rotor 14. This allows the lifting point position to be changed simply by disassembling and adjusting the position of the adjusting seat 8, enabling rapid adjustment based on the actual distance between the lifting points at both ends of the rotor 14 for different motor models, achieving universality and flexible adaptation of the lifting point position. The electric hoist 3 body remains fixed to both ends of the upper balance beam 1, avoiding the displacement problem that easily occurs when the electric hoist 3 moves on the balance beam via the drive wheels. It also eliminates the need to disassemble and reposition the heavy-duty electric hoist 3 in mid-air, reducing operational risks and improving the safety and applicability of the lifting process.

[0027] The first reversing wheel 4 is located directly below the corresponding electric hoist 3. Specifically, the two sets of first reversing wheels 4 are positioned with their opposite sides directly below the hook of the corresponding electric hoist 3, so that the upper end of the sling 6 is vertically connected to the hook of the electric hoist. This ensures that the hook of the electric hoist 3 is always vertically stressed, thereby avoiding the hook of the electric hoist 3 being subjected to horizontal or oblique forces. It also ensures that the chain or wire rope of the electric hoist 3 is always in a vertical motion state during operation, avoiding potential hazards such as chain or wire rope tangling or jamming.

[0028] Furthermore, guide seats 11 are fixedly connected to the side walls at both ends of the lower balance beam 2. A guide sleeve 12 is vertically fixed on the side of the guide seat 11 away from the lower balance beam 2. The guide sleeve 12 is located directly below the hook of the electric hoist 3 and above the first reversing wheel 4, so that the sling 6 passes vertically through the guide sleeve 12, so as to play a vertical guiding and limiting role for the sling 6, and ensure that the chain or wire rope of the electric hoist 3 maintains vertical movement during operation.

Claims

1. A hoist for removing a motor rotor, characterized by: It includes an upper balance beam, a lower balance beam, an electric hoist, a first reversing wheel, a second reversing wheel, and slings; The upper balance beam is hoisted and connected to the overhead crane hook via a hoisting assembly; electric hoists are fixedly connected to both ends of the upper balance beam. The lower balance beam is fixedly connected to the upper balance beam, and the lower balance beam is distributed parallel to the upper balance beam directly below it and maintains a distance from the upper balance beam; both ends of the lower balance beam are fixedly connected to the first reversing wheel. Two sets of adjustment seats are symmetrically arranged on the lower surface of the middle part of the lower balance beam. The adjustment seats are adjustable in the left and right positions on the lower balance beam and can be locked. Each adjustment seat is equipped with a second reversing wheel. Both sets of electric hoists have hooks with slings attached. The slings pass through the first and second reversing wheels in sequence and are vertically connected to both ends of the rotor. The first reversing wheel is located directly below the corresponding electric hoist, so that the upper end of the sling is vertically connected to the hook of the electric hoist.

2. A hoist for removing a motor rotor according to claim 1, characterized in that: The lower balance beam is I-shaped and includes an upper edge plate, a lower edge plate, and a web plate that are fixedly connected. The adjustment seat includes a U-shaped slider and a mounting plate; the upper surface of the mounting plate has U-shaped sliders with opposite openings fixed symmetrically on the front and rear sides, and the two sets of U-shaped sliders are respectively arranged to surround and slide on the front and rear sides of the lower edge plate.

3. The motor rotor disassembly lifting tool according to claim 2, characterized in that: The lower edge plate has positioning holes arranged at intervals along the left and right direction on both its front and rear sides; the adjusting seat is locked to the lower edge plate by means of pins and positioning holes.

4. The motor rotor disassembly lifting tool according to claim 3, characterized in that: A length adjusting rod is vertically fixed to the lower surface of the adjusting seat, and the second reversing wheel is located at the lower end of the length adjusting rod and on the side close to the first reversing wheel.

5. A motor rotor disassembly lifting tool according to any one of claims 1-4, characterized in that: The first reversing wheel is fixedly suspended on the lower surface of the end of the lower balance beam.

6. The motor rotor disassembly lifting tool according to claim 5, characterized in that: Guide seats are fixedly connected to the side walls at both ends of the lower balance beam. A guide sleeve is vertically fixed to the side of the guide seat away from the lower balance beam, and the sling passes vertically through the guide sleeve.

7. A motor rotor disassembly lifting tool according to any one of claims 1-4, characterized in that: The hoisting assembly includes lifting rings and lifting ropes. Two lifting rings are symmetrically fixed on the upper surface of the upper balance beam, and the lifting rings are fixedly connected to the crane hook through the lifting ropes.

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