Novel motor rotor drawing and penetrating device
By installing a dummy shaft on the motor rotor and utilizing a clamping and slot structure, the problems of unstable lifting and inaccurate center of gravity positioning in existing devices are solved, achieving more efficient rotor extraction and installation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAANXI NONFERROUS YULIN NEW MATERIAL GRP CO LTD
- Filing Date
- 2025-05-08
- Publication Date
- 2026-05-12
AI Technical Summary
The existing rotor extraction device is not stable enough during lifting and cannot accurately locate the center of gravity. It requires the cooperation of employees, which is time-consuming and labor-intensive, and reduces work efficiency.
A novel motor rotor extraction device is adopted, including I-beams, anchor heads, clamping and fixing frames, etc. It is integrated with the rotor through a dummy shaft, and the clamping and fixing frames and slots are used to strengthen the fixation. The lifting point is adjusted to coincide with the rotor's center of gravity to reduce friction between the stator and rotor.
It improves the stability and efficiency of the rotor extraction process, protects the stator and rotor windings of the motor, and reduces the difficulty of the operation.
Smart Images
Figure CN224233520U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor rotor extraction technology, and in particular to a novel motor rotor extraction device. Background Technology
[0002] Rotor extraction refers to the process where air inside the generator rotor is extracted from the near-shaft section of the rotor by the centrifugal force of rotation, causing the generator rotor to lose balance, resulting in vibration of the transmission system and mechanical damage.
[0003] Regarding the existing technology patent CN221428737U, which discloses a motor rotor extraction device, it includes a support rail, two sets of sliding structures, each set located at both ends of the support rail, two sets of shaft locking structures, each set located on one of the two sets of sliding structures for fixing the shafts at both ends of the motor rotor, and a lifting structure located between the sliding structures and the shaft locking structures for raising or lowering the shaft locking structures. This utility model, through the arrangement of the support rail, sliding structure, shaft locking structure, and lifting structure, allows for the extraction of large... When removing the rotor of the motor, the motor can be placed under the support rail, and two sets of shaft clamping structures can be used to clamp and fix the rotor to the shaft ends at both ends. Then, the shaft clamping structures can be raised using the hanging lifting structure, which can raise the rotor as a whole, so that the rotor is in a suspended state. At this time, the operator can directly pull the rotor to remove it from the motor housing. This makes it easier to remove the rotor, and the operator can easily pull out the rotor with their own hand strength, making it faster. After maintenance, the rotor can also be easily moved back into the motor housing, making the rotor removal safer and more efficient.
[0004] Existing methods for removing and inserting rotors in large motors involve using tools such as L-shaped dummy shafts, lifting devices, and overhead cranes. The specific method is as follows: First, an L-shaped dummy shaft is installed on the rotor. The bottom end of the L-shaped dummy shaft is fixed to the outside of the rotor, making the dummy shaft and rotor a single unit. The top crossbeam is suspended outside the motor stator and directly above the rotor, with lifting points set on the crossbeam. Before removal / insertion, the position of the lifting points on the crossbeam needs to be adjusted so that the lifting points coincide with the rotor's center of gravity. After leveling, the rotor is removed and inserted using an overhead crane. However, existing rotor removal and insertion devices require precise alignment of the rotor's center of gravity, and close attention must be paid to the gap between the rotor and stator cavity during lifting to prevent collisions between the motor stator and rotor, which could damage the motor. This requires skilled personnel and can easily damage the motor. Furthermore, if the gap is found to be too small or the center of gravity adjustment is off when the removal and insertion is halfway complete, it is impossible to perform a second alignment during the process. Also, only one side of the rotor is lifted during removal and insertion, resulting in poor stability. Utility Model Content
[0005] To overcome the problems of existing rotor extraction devices being unstable during lifting, unable to accurately position the center of gravity, requiring employee cooperation, being time-consuming and labor-intensive, and reducing subsequent work efficiency.
[0006] The technical solution of this utility model is as follows: a novel motor rotor extraction device, comprising an I-beam, with anchor heads connected to the left and right sides of the front end of the I-beam, connecting blocks below the two anchor heads, hooks fixedly connected to the lower ends of the two connecting blocks, a supporting beam below the two hooks, an extension block fixedly connected to one side of the lower end face of the supporting beam, clamping and fixing frames movably connected to the front and rear ends of the extension blocks, clamping blocks fixedly connected inside the two clamping and fixing frames, a dummy shaft between the two clamping and fixing frames, fixing blocks fixedly connected to the left and right sides of the dummy shaft, slots opened inside the upper and lower ends of the two fixing blocks, movable grooves opened inside the upper and lower ends of the two clamping blocks, springs fixedly connected inside the movable grooves, a rod inserted into the slot fixedly connected to one end of the spring, a slot opened inside one side of the clamping and fixing frame, and a locking block that engages with the slot fixedly connected to one side of the other clamping and fixing frame.
[0007] Preferably, by attaching the dummy shaft to the outside of the motor shaft body, the support beam can be leveled by using an anchor head crane. This new device can effectively reduce the friction between the stator and rotor of the motor, protect the stator and rotor windings of the motor, reduce the difficulty of work, and improve work efficiency.
[0008] As a preferred embodiment, support steel pipes are fixedly connected to both the left and right sides of the lower end face of the I-beam, and support plates are fixedly connected to the lower end faces of the two support steel pipes.
[0009] Preferably, both support plates are movably connected to casters, and both casters are equipped with locking devices.
[0010] Preferably, a winding reel is fixedly connected to the front end of the anchor head crane, and a chain is sleeved on the outside of the winding reel.
[0011] Preferably, an adjusting rod is fixedly connected to the bottom of the anchor head crane, and a hoist connector is sleeved on the outside of the adjusting rod.
[0012] Preferably, the inside of the hoist connector is provided with a hook groove, and the hook fixedly connected to the upper end face of the connector block is inserted into the hook groove.
[0013] Preferably, arc-shaped sleeves are fixedly connected to both sides of the upper end face of the support beam, and hooks fixedly connected to the lower end face of the connecting block are inserted into the arc-shaped sleeves. Movable shafts are movably connected between the two clamping and fixing frames and the extension block.
[0014] The beneficial effects of this utility model are:
[0015] 1. This novel motor rotor extraction and insertion device involves installing a dummy shaft on the rotor and then fitting the dummy shaft onto the motor shaft body, making the dummy shaft and rotor an integral structure. It is then fixed by hooks and arc-shaped sleeves. Before extraction and insertion, the positions of the dummy shaft and the support beam hoisting points need to be adjusted so that the hoisting points coincide with the rotor's center of gravity. After leveling with anchor heads, this novel device can effectively reduce friction between the motor's stator and rotor, protect the motor's stator and rotor windings, reduce the difficulty of the work, and improve work efficiency.
[0016] 2. This novel motor rotor extraction device uses two clamping and fixing brackets to clamp the dummy shaft. While clamping, the insertion rod is inserted into the slots opened inside the fixing blocks on the left and right sides of the dummy shaft to strengthen the fixation, which facilitates the disassembly and installation of the dummy shaft. Attached Figure Description
[0017] Figure 1 The diagram shown is a three-dimensional structural schematic of the rotor extraction device for an electric motor according to this utility model.
[0018] Figure 2 This utility model is shown. Figure 1 A magnified schematic diagram of the three-dimensional structure at point A;
[0019] Figure 3 The image shown is a three-dimensional side view of the rotor-extraction device for an electric motor according to this utility model.
[0020] Figure 4 This utility model is shown. Figure 3 A magnified schematic diagram of the three-dimensional structure at point B;
[0021] Figure 5 The diagram shown is a cross-sectional view of the dummy shaft connection of this utility model.
[0022] Figure 6 This utility model is shown. Figure 5 A magnified schematic diagram of the partial structure at point C in the solid geometry.
[0023] Explanation of reference numerals in the attached drawings: 1. I-beam; 2. Supporting steel pipe; 3. Anchor head; 4. Connecting block; 5. Supporting crossbeam; 6. Hook; 7. Arc sleeve; 8. Extension block; 9. Dummy shaft; 10. Caster wheel; 11. Rewind reel; 12. Hoist connector; 13. Movable shaft; 14. Clamping and fixing frame; 15. Fixing block; 16. Clamping block; 17. Locking block; 18. Locking groove; 19. Movable groove; 20. Spring; 21. Insert rod; 22. Slot. Detailed Implementation
[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0025] Please see Figures 1-6 This utility model provides an embodiment: a novel rotor-extraction device for an electric motor, comprising an I-beam 1, with anchor head hangers 3 connected to the left and right sides of the front end of the I-beam 1, connecting blocks 4 arranged below the two anchor head hangers 3, hooks 6 fixedly connected to both ends of the lower part of the two connecting blocks 4, a supporting beam 5 arranged below the two hooks 6, an extension block 8 fixedly connected to one side of the lower end face of the supporting beam 5, clamping and fixing frames 14 movably connected to both the front and rear ends of the extension block 8, and clamping blocks 16 fixedly connected inside the two clamping and fixing frames 14. A dummy shaft 9 is provided between the clamping and fixing brackets 14. Fixing blocks 15 are fixedly connected to both sides of the dummy shaft 9. Slots 22 are opened inside the upper and lower ends of the two fixing blocks 15. Movable grooves 19 are opened inside the upper and lower ends of the two clamping blocks 16. A spring 20 is fixedly connected inside the movable groove 19. One end of the spring 20 is fixedly connected to the insertion rod 21 that is inserted into the slot 22. A slot 18 is opened inside one side of the clamping and fixing bracket 14. A locking block 17 that is locked into the slot 18 is fixedly connected to one side of the other clamping and fixing bracket 14.
[0026] Please see Figures 1-2 In this embodiment, support steel pipes 2 are fixedly connected to both sides of the lower end face of the I-beam 1. Support plates are fixedly connected to the lower end faces of the two support steel pipes 2. The support steel pipes 2 provide support for the whole structure. Universal wheels 10 are movably connected inside the two support plates. Both universal wheels 10 are equipped with locking devices to facilitate displacement. A winding reel 11 is fixedly connected to the front end face of the anchor head crane 3. A chain is sleeved on the outside of the winding reel 11. First, a dummy shaft 9 is installed on the rotor and then sleeved onto the motor shaft body to make the dummy shaft 9 and the rotor an integral structure. The support beam 5 is suspended outside the motor stator and directly above the rotor. Lifting points are set on the support beam 5 and fixed to the arc sleeve 7 by hooks 6. Before the extraction and insertion construction, the positions of the dummy shaft 9 and the lifting points of the support beam 5 need to be adjusted so that the lifting points coincide with the center of gravity of the rotor. After leveling with the anchor head crane 3.
[0027] Please see Figures 2-4In this embodiment, an adjusting rod is fixedly connected to the lower part of the anchor head 3. A hoist connector 12 is sleeved on the outside of the adjusting rod. A hook groove is opened inside the hoist connector 12. The hook 6 fixedly connected to the upper end face of the connecting block 4 is hooked into the hook groove for fixing the hook 6. Arc sleeves 7 are fixedly connected to the left and right sides of the upper end face of the supporting beam 5. The hook 6 fixedly connected to the lower end face of the connecting block 4 is hooked into the arc sleeve 7. A movable shaft 13 is movably connected between the two clamping and fixing frames 14 and the extension block 8. The angle of the clamping and fixing frame 14 can be adjusted by the movable shaft 13 to clamp and fix the dummy shaft 9. The application of this new device can effectively reduce the friction between the stator and rotor of the motor, protect the stator and rotor windings of the motor, reduce the difficulty of work, and improve the work efficiency. The dummy shaft 9 can be clamped by the two clamping and fixing frames 14. While clamping, the insertion rod 21 is inserted into the slots 22 opened inside the fixing blocks 15 on the left and right sides of the dummy shaft 9 to strengthen the fixation, which facilitates the disassembly and installation of the dummy shaft 9.
[0028] During operation, a dummy shaft 9 is first installed on the rotor and then fitted onto the motor shaft body, making the dummy shaft 9 and the rotor an integral structure. The support beam 5 is suspended outside the motor stator and directly above the rotor. Lifting points are set on the support beam 5 and fixed with hooks 6 and arc sleeves 7. Before pulling and inserting, the positions of the dummy shaft 9 and the lifting points of the support beam 5 need to be adjusted so that the lifting points coincide with the rotor's center of gravity. After leveling with anchor head 3, this new device can effectively reduce friction between the motor stator and rotor, protect the motor stator and rotor windings, reduce the difficulty of work, and improve work efficiency. The dummy shaft 9 can be clamped by two clamping and fixing brackets 14. While clamping, the insertion rod 21 is inserted into the slots 22 opened inside the fixing blocks 15 on the left and right sides of the dummy shaft 9 to strengthen the fixation, which facilitates the disassembly and installation of the dummy shaft 9.
[0029] Through the above steps, by installing a dummy shaft 9 on the rotor and fitting the dummy shaft 9 onto the motor shaft body, the dummy shaft 9 and the rotor become an integral structure. It is then fixed by hook 6 and arc-shaped sleeve 7. This solves the problems of existing rotor-pulling devices being unstable during lifting, unable to accurately position the center of gravity, requiring employee cooperation, being time-consuming and labor-intensive, and reducing subsequent work efficiency.
Claims
1. A novel rotor-extraction device for electric motors, comprising an I-beam (1), characterized in that: Anchor head cranes (3) are connected to the left and right sides of the front end of the I-beam (1). Connecting blocks (4) are set below the two anchor head cranes (3). Hooks (6) are fixedly connected to both ends of the two connecting blocks (4). Support beams (5) are set below the two hooks (6). An extension block (8) is fixedly connected to one side of the lower end face of the support beam (5). Clamping and fixing frames (14) are movably connected to both ends of the extension block (8). Clamping blocks (16) are fixedly connected inside the two clamping and fixing frames (14). A dummy shaft (9) is set between the two clamping and fixing frames (14). Fixed blocks (15) are fixedly connected to both sides of the shaft (9). Slots (22) are opened inside the upper and lower ends of the two fixed blocks (15). Movable grooves (19) are opened inside the upper and lower ends of the two clamping blocks (16). Springs (20) are fixedly connected inside the movable grooves (19). One end of the spring (20) is fixedly connected to the insertion rod (21) that is inserted into the slot (22). A slot (18) is opened inside the clamping bracket (14) on one side. A card block (17) that is inserted into the slot (18) is fixedly connected to one side of the clamping bracket (14) on the other side.
2. The novel rotor-extraction device for an electric motor according to claim 1, characterized in that: Supporting steel pipes (2) are fixedly connected to the left and right sides of the lower end face of the I-beam (1), and supporting plates are fixedly connected to the lower end faces of the two supporting steel pipes (2).
3. The novel rotor-extraction device for an electric motor according to claim 2, characterized in that: Both support plates are movably connected to casters (10), and both casters (10) are equipped with locking devices.
4. The novel rotor-extraction device for an electric motor according to claim 1, characterized in that: The front end of the anchor head crane (3) is fixedly connected to a winding reel (11), and a chain is sleeved on the outside of the winding reel (11).
5. A novel rotor-extraction device for an electric motor according to claim 1, characterized in that: An adjusting rod is fixedly connected to the bottom of the anchor head crane (3), and a hoist connector (12) is sleeved on the outside of the adjusting rod.
6. A novel rotor-extraction device for an electric motor according to claim 5, characterized in that: The inside of the gourd connector (12) is provided with a hook groove, and the hook (6) fixedly connected to the upper end of the connecting block (4) is hung in the hook groove.
7. A novel rotor-extraction device for an electric motor according to claim 1, characterized in that: Arc sleeves (7) are fixedly connected to both sides of the upper end face of the supporting beam (5). The hooks (6) fixedly connected to the lower end face of the connecting block (4) are inserted into the arc sleeves (7). Movable shafts (13) are movably connected between the two clamping fixing frames (14) and the extension block (8).