Heavy-duty motor rotor removal device

Abstract

This utility model discloses a heavy-duty motor rotor removal device, including a lower frame. A motor support bracket is slidably mounted on the lower frame. Support frames are vertically mounted on both sides of the lower frame. A track frame is connected between the upper parts of the two support frames. A first movable seat and a second movable seat are movably connected to the track frame. A first lifting assembly and a second lifting assembly are respectively connected below the first and second movable seats. A first hook is connected below the first lifting assembly, and a second hook is connected below the second lifting assembly. A first rotor clamp is connected to the bottom of the first hook, and a second rotor clamp is connected to the bottom of the second hook. This solution can reduce manual handling and positioning time, and significantly improve rotor disassembly efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of extraction devices, specifically relating to a heavy-duty motor rotor extraction device. Background Technology

[0002] As a crucial component of a motor, the rotor may need to be removed from the stator after prolonged operation for maintenance, repair, or replacement. Because the rotors of large or heavy-duty motors are typically bulky and heavy, the removal process must simultaneously ensure safety and high efficiency. Traditional rotor removal methods often rely on manual labor with the assistance of cranes or jacks, which presents problems such as high labor intensity, complex operation, low positioning accuracy, and the risk of collisions between the rotor and stator. This not only affects work efficiency but may also damage the equipment.

[0003] Chinese patent application number 2008202340987 discloses a motor rotor removal device. This device comprises a lifting mechanism, a moving mechanism, and a supporting mechanism at both ends of the rotor. The lifting mechanism can be a jack or an electric lifter, the moving mechanism is a trolley with rollers at the bottom, and the supporting mechanism is bolted to the rotor end via tubing. In use, two trolleys are placed at each end of the rotor, and the rotor is lifted to a position concentric with the stator using jacks. The trolleys are then pushed to pull the rotor out. This design reduces the intensity of manual handling to some extent and allows for height adjustment to prevent the rotor from colliding with the stator. However, during the removal process, the movement of the trolleys on the ground is greatly affected by the flatness of the ground. If the ground is uneven, the rotor is prone to shaking and falling during extraction.

[0004] Therefore, there is a need for a removal mechanism that is structurally stable, highly integrated, has good positioning accuracy, and can safely and efficiently remove the rotor of a heavy-duty motor, in order to solve the problems of cumbersome operation and dependence on ground conditions in the existing technology. Utility Model Content

[0005] To address the aforementioned problems, this utility model discloses a heavy-duty motor rotor removal device, comprising a lower frame, a motor bearing bracket plate slidably mounted on the lower frame, support frames vertically mounted on both sides of the lower frame, a track frame connected between the upper parts of the two support frames, a first movable seat and a second movable seat movably connected on the track frame, a first lifting assembly and a second lifting assembly respectively connected below the first and second movable seats, a first hook connected below the first lifting assembly, a second hook connected below the second lifting assembly, a first rotor clamp connected to the bottom of the first hook, and a second rotor clamp connected to the bottom of the second hook.

[0006] Preferably, the first rotor clamp includes a first clamp tube and a first adapter tube inserted into the first clamp tube. Both the first clamp tube and the first adapter tube are hollow structures. A first lifting ring is connected to the upper part of one end of the first clamp tube, and a first bolt fixing hole is provided through the upper part of the other end of the first clamp tube. The second rotor clamp includes a second clamp tube and a second adapter tube inserted into the second clamp tube. Both the second clamp tube and the second adapter tube are also hollow structures. A second lifting ring is connected to the upper part of one end of the second clamp tube, and a second bolt fixing hole is provided through the upper part of the other end of the second clamp tube.

[0007] Preferably, a rotor support bracket plate is also slidably provided on the lower frame, and the rotor support bracket plate is arranged parallel to the motor support bracket plate.

[0008] Preferably, the bottom of the lower frame is provided with a first roller for support and movement, and the bottom of both the motor support bracket plate and the rotor support bracket plate are provided with a second roller for support and movement.

[0009] Preferably, the top two sides of the support frame are respectively connected to a first reinforcing rib and a second reinforcing rib, and the bottom of the first reinforcing rib and the second reinforcing rib are connected to the lower frame.

[0010] The advantages of this utility model are: 1. This solution utilizes a combination of a track frame, a movable base, and a lifting assembly to achieve smooth separation of the rotor in a coaxial, horizontal state via hoisting. Clamping tubes and adapter tubes fix both ends of the rotor, ensuring its stability during extraction and maintaining a safe clearance from the stator, unaffected by ground flatness.

[0011] 2. In this solution, the motor support bracket plate and the rotor support bracket plate work together, allowing the operator to remove the rotor without the need for an additional crane or ground trolley. The overall structure enables single-person controllable operation, reduces on-site space occupation, and improves work efficiency.

[0012] 3. The lower frame of this solution is movable and the clamp design is flexible, allowing operators to quickly switch the device from one motor to another without reinstalling or adjusting complex support structures. This is particularly suitable for scenarios in factories or repair shops where frequent maintenance of heavy-duty motors of different specifications is required, thereby improving overall operational flexibility and efficiency. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the rotor in disassembled state of this utility model.

[0014] Figure 2 This is a schematic diagram of the two rotor clamps of this utility model.

[0015] Figure 3This is a cross-sectional structural diagram of the rotor clamp of this utility model.

[0016] Figure 4 This is a structural diagram of the hoisting motor of this utility model.

[0017] In the diagram: 1. Lower frame, 2. Motor support bracket plate, 3. Support frame, 4. Track frame, 5. First moving seat, 6. Second moving seat, 7. First lifting assembly, 8. Second lifting assembly, 9. First hook, 10. Second hook, 11. First clamping tube, 12. First adapter tube, 13. First lifting ring, 14. First bolt fixing hole, 15. Second clamping tube, 16. Second adapter tube, 17. Second lifting ring, 18. Second bolt fixing hole, 19. Rotor support bracket plate, 20. First roller, 21. Second roller, 22. First reinforcing rib, 23. Second reinforcing rib, 24. Rope, 25. Locking bolt. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0019] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Simultaneously, when an component is referred to as "fixed to" or "equipped on" another component, it can be directly on the other component or may have an intervening component present. When an component is referred to as "connected to" another component, it can be directly connected to the other component or may have an intervening component present. When an component is referred to as "fixedly connected to" another component, it can be a common fixed connection method such as welding, bolting, or gluing. In short, those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] like Figure 1As shown, a heavy-duty motor rotor removal device includes a lower frame 1 with a slide rail on it. A motor support bracket 2 is slidably mounted on the slide rail. Support frames 3 are vertically mounted on both sides of the lower frame 1. A track frame 4 is fixedly connected between the upper parts of the two support frames 3. A first movable seat 5 and a second movable seat 6 are movably connected to the track frame 4. The first movable seat 5 and the second movable seat 6 are independent of each other and can slide freely along the track frame 4 in opposite or opposite directions. The first movable seat 5 and the second movable seat 6 can be moved along the track frame 4 by any driving method in the prior art, such as manual or electric drive mechanisms.

[0022] In this embodiment, a first lifting assembly 7 and a second lifting assembly 8 are respectively connected below the first movable seat 5 and the second movable seat 6. The two lifting assemblies have the same structure and preferably adopt an electric push rod type lifting mechanism so as to maintain smooth and synchronous lifting action when carrying the motor or rotor. A first hook 9 is connected below the first lifting assembly 7, and a second hook 10 is connected below the second lifting assembly 8. Both hooks are made of high-strength forged steel and can withstand the rotor's own weight and the impact load generated during operation.

[0023] Combination Figure 2 The bottom of the first hook 9 is connected to the first rotor clamp via a rope 24, and the bottom of the second hook 10 is connected to the second rotor clamp via a rope 24. The first rotor clamp includes a first clamping tube 11 and a first adapter tube 12 inserted into the first clamping tube 11. Both the first clamping tube 11 and the first adapter tube 12 are hollow circular tubes. The material of the first clamping tube 11 is preferably thick-walled alloy steel to balance strength and weight. A first lifting ring 13 is fixedly connected to the top of one end of the first clamping tube 11, and a first bolt fixing hole 14 is provided through the top of the other end for reliable fixation to the first adapter tube 12 by a locking bolt 25. The structure of the second rotor clamp is similar to that of the first rotor clamp, including a second clamping tube 15 and a second adapter tube 16 inserted into the second clamping tube 15. Both the second clamping tube 15 and the second adapter tube 16 are also hollow structures, with a second lifting ring 17 connected to the top of one end and a second bolt fixing hole 18 provided through the top of the other end.

[0024] To facilitate temporary placement and maintenance of the rotor after removal, a rotor support bracket plate 19 is slidably provided on the lower frame 1. The rotor support bracket plate 19 and the motor support bracket plate 2 are arranged in parallel. The two can move along the guide rail or slide groove on the lower frame 1. The movement can be achieved by roller sliding cooperation or by using a linear guide rail slider to reduce frictional resistance and improve load-bearing stability.

[0025] The bottom of the lower frame 1 is provided with a first roller 20 for support and movement. In this embodiment, it is preferably a high-load-bearing universal wheel with braking function so that it can be locked after the equipment is positioned to prevent displacement during operation. The braking structure is a common friction braking mechanism. By rotating the handle, the handle presses the brake pad against the wheel axle or wheel body through the screw mechanism to lock the wheel; rotating the handle in the opposite direction releases the brake pad, and the wheel resumes free rolling. This structure is well known in the art, and its specific structure will not be described in detail in this embodiment. The bottom of the motor support bracket plate 2 and the rotor support bracket plate 19 are respectively provided with a second roller 21 for support and movement. The second roller 21 cooperates with the guide rail set on the lower frame 1 to achieve guidance. The guide rail is a V-shaped rail, and the second roller is a matching V-shaped roller. These rollers are installed at the bottom of the bracket plate to maintain smooth movement when carrying heavy motors or rotors.

[0026] The top two sides of the support frame 3 are respectively connected to the first reinforcing rib 22 and the second reinforcing rib 23. The reinforcing ribs are fixedly connected to the lower frame 1 to form a triangular stable support structure, which can significantly improve the bending and torsional resistance of the support frame 3 when bearing the weight of the lifting components and the rotor.

[0027] The lower frame 1 is a welded frame structure, its length and width customized according to the size of the compatible motor. The frame structure ensures overall rigidity while facilitating the movement of the lower frame 1 to the motor's operating position. During use, the operator first moves the entire device to the location of the heavy-duty motor, then locks the lower frame 1 by adjusting the braking mechanism of the first roller 20, ensuring stability during operation. Figure 4 After the device is in place, one end of the traction rope 24 is connected to the traction point on the upper part of the heavy-duty motor, which can be a lifting ring or a special hanging lug on the motor body, and the other end is connected to the hook at the bottom of any moving seat. Then, the motor is lifted to an appropriate height by the lifting assembly. At this time, the motor support bracket 2 can be moved to a predetermined position above the lower frame 1 so that the motor can be placed stably on the motor support bracket 2.

[0028] Next, insert one end of the rotor shaft into the first adapter tube 12 and the other end into the second adapter tube 16. Then, insert the first adapter tube 12 into the first clamp tube 11 and the second adapter tube 16 into the second clamp tube 15. Subsequently, combine... Figure 3 Insert the locking bolts 25 into the first bolt fixing hole 14 and the second bolt fixing hole 18 in sequence, and tighten them. The first adapter tube 12 and the second adapter tube 16 are supported by elastic metal materials such as springs, which can generate radial contraction when the bolts are tightened to ensure that the first clamp tube 11 and the second clamp tube 15 are firmly connected to the rotor shaft.

[0029] To ensure balanced force at both ends during rotor extraction, in this embodiment, the first lifting ring 13 of the first clamp tube 11 is connected to the first hook 9 via a high-strength sling, and the second lifting ring 17 of the second clamp tube 15 is connected to the second hook 10 via a sling. This ensures that both ends of the rotor remain at the same horizontal level throughout the entire extraction process, effectively preventing collisions with the stator inner wall. The second clamp tube 15 is longer; during rotor extraction, the second adapter tube 16 and the second clamp tube 15 need to cooperate with the internal space of the motor. The longer length of the second clamp tube 15 provides better operating space when extracting the rotor, allowing it to slide smoothly out of the motor, thereby improving the convenience and safety of the extraction process.

[0030] During rotor extraction, the operator pushes the motor support bracket 2 to one side along the track on the lower frame 1. Since the rotor is fixed at both ends by clamping tubes and adapter tubes and suspended on hooks, the motor body, including the stator, gradually separates from the rotor as the motor support bracket 2 moves. At this time, the rotor remains suspended in the clamping system, while the stator moves to one side with the bracket plate, thus completing the physical separation of the rotor and stator.

[0031] After the motor body separates from the rotor, the second clamp tube 15 can partially enter the hollow hole formed by the stator, thereby reducing the relative displacement between the rotor and the motor and maintaining a smooth and continuous extraction operation. After the rotor is completely extracted, the rotor support bracket plate 19 can be moved under the rotor, and the height of the two lifting components can be slowly lowered so that the rotor is smoothly placed on the support plate. The rotor support bracket plate 19 has a support structure that matches the rotor, which can be a V-groove support or a multi-point roller support, which can prevent the rotor from rolling and facilitate rotation operations during subsequent maintenance.

[0032] This invention enables efficient, safe, and single-person controlled removal of heavy-duty motor rotors. The entire process requires no additional ground trolley or crane, reducing the space occupied on-site. The combination of the track frame 4, the movable seat, and the lifting assembly allows for smooth separation of the rotor in a coaxial horizontal state, greatly reducing the risk of rotor-stator collision. The combination design of the clamping tube and the adapter tube allows for quick replacement of the clamps according to different rotor shaft diameters, providing excellent adaptability and versatility. Furthermore, due to the overall movable design of the lower frame 1, this device can quickly switch from one motor to another, making it suitable for large factories, motor repair workshops, and other scenarios requiring frequent maintenance of heavy-duty motors.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heavy electrical machine rotor extraction device, characterized by: The device includes a lower frame (1), on which a motor bearing bracket plate (2) is slidably provided. Support frames (3) are vertically provided on both sides of the lower frame (1). A track frame (4) is connected between the upper parts of the two support frames (3). A first movable seat (5) and a second movable seat (6) are movably connected on the track frame (4). A first lifting assembly (7) and a second lifting assembly (8) are respectively connected below the first movable seat (5) and the second movable seat (6). A first hook (9) is connected below the first lifting assembly (7), and a second hook (10) is connected below the second lifting assembly (8). A first rotor clamp is connected to the bottom of the first hook (9), and a second rotor clamp is connected to the bottom of the second hook (10).

2. The heavy electric machine rotor extraction device of claim 1, wherein: The first rotor clamp includes a first clamp tube (11) and a first adapter tube (12) inserted into the first clamp tube (11). Both the first clamp tube (11) and the first adapter tube (12) are hollow structures. A first lifting ring (13) is connected to the upper part of one end of the first clamp tube (11), and a first bolt fixing hole (14) is provided through the upper part of the other end of the first clamp tube (11). The second rotor clamp includes a second clamp tube (15) and a second adapter tube (16) inserted into the second clamp tube (15). Both the second clamp tube (15) and the second adapter tube (16) are hollow structures. A second lifting ring (17) is connected to the upper part of one end of the second clamp tube (15), and a second bolt fixing hole (18) is provided through the upper part of the other end of the second clamp tube (15).

3. The heavy electric machine rotor extraction apparatus of claim 2, wherein: The lower frame (1) is also slidably provided with a rotor support bracket plate (19), which is arranged parallel to the motor support bracket plate (2).

4. The heavy-duty motor rotor removal device according to claim 3, characterized in that: The bottom of the lower frame (1) is provided with a first roller (20) for support and movement, and the bottom of the motor support bracket plate (2) and the rotor support bracket plate (19) are both provided with a second roller (21) for support and movement.

5. The heavy electric machine rotor extraction apparatus of claim 4, wherein: The top two sides of the support frame (3) are respectively connected to a first reinforcing rib (22) and a second reinforcing rib (23), and the bottom of the first reinforcing rib (22) and the second reinforcing rib (23) are connected to the lower frame (1).

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