Motor maintenance rotor hoisting tool

Abstract

The utility model discloses a rotor hoisting tool for motor maintenance, which comprises a hoisting beam, a hoisting ring is detachably arranged on the hoisting beam, the hoisting beam is movably connected with a cantilever, one end of the cantilever is provided with a clamping piece for clamping rotors with different shaft diameters, and the other end of the cantilever is provided with a lifting hook. The other end of the cantilever is provided with an adjusting piece used for adjusting the orientation of the cantilever and the rotor, and the adjusting piece is movably connected with the hanging beam. Only one hoisting point is arranged above the rotor, the hoisting point, the hoisting beam and the cantilever do not interfere with the operation of drawing and penetrating the rotor, and the position of the hoisting point can be adjusted according to the structure of the motor, so that the hoisting point is ensured to be on the central line of the rotor, the rotor is kept in a horizontal state after being hoisted, and the personal safety and the equipment safety of hoisting are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of motor maintenance, in particular to a motor maintenance rotor hoisting tool. Background Art

[0002] An electric motor is a device that converts electrical energy into mechanical energy using the principle of electromagnetic action. It is mainly composed of a stator and a rotor.

[0003] Long-term continuous operation of the motor will cause wear of the mechanical parts and require regular inspection and maintenance. Failures may occur during operation and require repair. Motor rotor extraction is a necessary procedure in the inspection and maintenance process. The gap between the stator and rotor of a conventional motor is 0.1-0.3mm for small ones, 0.2-0.4mm for medium ones, and 0.4-0.8mm for large ones. Therefore, the operating space for motor rotor extraction is limited, and the maintenance process requires precise operation.

[0004] The traditional method for small and medium-sized motors is still to lift and install them by hand, and large and medium-sized motors often use motor shafts connected to hollow dummy shafts with lifting equipment to extract the rotors, or L-shaped crank arm hanging beams to extract the rotors. The above operation methods have the following defects: first, they require the cooperation of multiple people, the labor intensity is high, the control accuracy is poor, and it is easy to cause collisions between the rotor and the stator.

[0005] Secondly, conventional motor rotor extraction tools use steel pipes to make a fake shaft with an extended sleeve, which is connected to the motor shaft and cooperates with lifting equipment to achieve rotor extraction. The concentricity and verticality of the rotor and stator need to be adjusted many times, which is time-consuming. During the lifting process, as the rotor moves horizontally, the center of gravity of the rotor changes continuously, the stability is poor, and the stator has the risk of rollover. There are also safety risks such as loose connection of the fake shaft and falling of the lifting cable. The fake shaft and the rotor and stator collide, which is easy to cause personal injury accidents and secondary damage to the motor. L-shaped crank arm crane beam rotor extraction is also difficult to adjust the accuracy of the rotor center of gravity, which is easy to cause collision or damage to the rotor and stator.

[0006] Secondly, different motor models have different rotor shaft diameters, which requires many types of dummy shafts of different sizes and specifications to match. Rotors with different shaft diameters also need to be installed with bushings that match the shaft diameter, which results in high production costs. Utility Model Content

[0007] The purpose of the utility model is to provide a motor maintenance rotor lifting tool in order to solve the above-mentioned problem, which can simplify the motor rotor extraction process, reduce the labor intensity of operators, improve control accuracy and work efficiency, effectively reduce the risk of stator and rotor collision, and avoid personal injury accidents and secondary damage to the motor.

[0008] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0009] A motor maintenance rotor lifting tool comprises a hanging beam, on which a hanging ring is detachably provided, the hanging beam is movably connected to the cantilever, one end of the cantilever is provided with a clamping piece for clamping rotors of different shaft diameters, the other end of the cantilever is provided with an adjusting piece for adjusting the orientation of the cantilever and the rotor, and the adjusting piece is movably connected to the hanging beam.

[0010] Preferably, a plurality of mounting holes are provided on the top of the suspension beam, and connecting holes corresponding to the mounting holes are provided on the suspension ring, and the mounting holes are connected to the connecting holes via pins.

[0011] Preferably, the cantilever includes a vertical arm and a horizontal arm, one end of the vertical arm is movably connected to the suspension beam, and the other end of the vertical arm is connected to the horizontal arm; the clamping piece is arranged at one end of the horizontal arm, and the adjusting piece is arranged at the other end of the horizontal arm.

[0012] Preferably, the clamping piece includes a sleeve, which is arranged at one end of the cross arm, and bushings are symmetrically arranged in the sleeve, and a movable bushing is arranged in the bushing. A fastening bolt is passed between the sleeve and the bushing to adjust the distance between the bushings.

[0013] Preferably, the adjusting member comprises a hydraulic jacking member, a base of the hydraulic jacking member is arranged on the cross arm, and a top of the hydraulic jacking member is movably connected to the suspension beam.

[0014] The beneficial effects of the utility model are:

[0015] 1. The utility model has only one lifting point, which is arranged above the rotor. The lifting point, the lifting beam and the cantilever do not interfere with the operation of pulling out the rotor. The position of the lifting point can be adjusted according to the motor structure to ensure that the lifting point is on the center line of the rotor, so that the rotor is in a horizontal state after lifting, ensuring the personal safety and equipment safety of the lifter.

[0016] 2. The utility model adopts a cantilever structure, and through a hydraulic device, the rotor level can be accurately adjusted to ensure the coaxiality of the stator and the rotor, so that the gap between the stator and the rotor is fixed, which is convenient for operation.

[0017] 3. The utility model adopts a casing method, is equipped with an adjustable bushing, and is equipped with a fastening device, which is suitable for the extraction and penetration of motor rotors with different shaft diameters, improves the universal effect of special tools, and enhances the operational stability; the bushing-type movable bushing configured inside the casing is relatively soft, which avoids damage to the shaft during the lifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] The following are the descriptions of the reference numerals:

[0021] 1 is a lifting ring, 2 is a mounting hole, 3 is a lifting beam, 4 is a first connecting shaft, 5 is a second connecting shaft, 6 is a hydraulic jacking piece, 8 is a horizontal arm, 9 is a sleeve, 10 is a vertical arm, 11 is a fastening bolt, 12 is an electric motor, 13 is a movable bushing, and 14 is a bushing. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1 , the technical solution of the utility model is further explained:

[0023] like Figure 1 As shown, the utility model discloses a motor maintenance rotor hoisting tool, including a hanging beam 3, on which a hanging ring 1 is detachably provided, a plurality of mounting holes 2 are provided on the top of the hanging beam 3, a connecting hole corresponding to the mounting hole 2 is provided on the hanging ring 1, and the mounting hole 2 is connected to the connecting hole through a pin. In other words, 5-7 mounting holes are evenly spaced on the top of the hanging beam, and the position of the hanging ring can be adjusted according to the position of the rotor's center of gravity, so that the hanging ring is located directly above the rotor's center of gravity, and then the pin is inserted between the hanging ring and the hanging beam.

[0024] Specifically, Figure 1 As shown, the suspension beam 3 is movably connected to the cantilever. That is, the suspension beam includes an inclined section and a straight section, a mounting hole is opened at the intersection of the inclined section and the straight section, and the top of the cantilever is inserted into the mounting hole through a first connecting shaft, that is, the vertical arm is connected to the suspension beam through the first connecting shaft and the sliding bearing.

[0025] In some embodiments, the cantilever includes a vertical arm 10 and a horizontal arm 8, one end of the vertical arm 10 is movably connected to the suspension beam 3, and the other end of the vertical arm 10 is connected to the horizontal arm 8. In other words, the top of the vertical arm is movably inserted into the mounting hole through a connecting shaft, and the lower part of the vertical arm is connected to the horizontal arm.

[0026] It should be noted that the vertical arm 10 and the horizontal arm 8 are an integrally formed structure.

[0027] In some embodiments, Figure 1As shown, a clamping piece for clamping rotors with different shaft diameters is provided at one end of the cantilever, and the clamping piece is provided at one end of the cross arm 8 in the cantilever. In other words, a clamping piece is provided at the front end of the cross arm, and the clamping piece can be used to clamp rotors with different shaft diameters, greatly improving the versatility of the overall tool.

[0028] like Figure 1 As shown, the clamping piece includes a sleeve 9, which is arranged at one end of the cross arm 8, and sleeves 14 are arranged symmetrically and movably in the sleeve 9, and a movable bushing 13 is arranged in the sleeve 14. A fastening bolt 11 is passed between the sleeve 9 and the sleeve 14 to adjust the distance between the sleeves 14. In other words, a sleeve is arranged at the front end of the cross arm, and a pair of sleeves are installed in the sleeve. The sleeve is provided with a fastening adjustment bolt of the sleeve above the sleeve. The adjustment bolt is tightened by a handle to adjust the distance between the sleeves, thereby meeting the clamping requirements of rotors with different shaft diameters; at the same time, a sleeve-type movable bushing is arranged, which is made of brass. The bushing and the inner wall of the sleeve fit tightly and are fixed with countersunk hexagon socket bolts. The sleeve-type movable bushing arranged inside the sleeve is relatively soft, which avoids damage to the shaft during the lifting process.

[0029] Specifically, Figure 1 As shown, the other end of the cantilever is provided with an adjusting member for adjusting the orientation of the cantilever and the rotor, the adjusting member is provided at the other end of the cross arm 8, and the adjusting member is movably connected to the suspension beam 3. In other words, the adjusting member is installed at the end of the cross arm away from the rotor, and the top of the adjusting member is connected to the straight section in the suspension beam through the second connecting shaft. By raising or lowering the adjusting member, the cross arm and the casing can be synchronously raised or lowered, thereby adjusting the coaxiality of the rotor and the stator.

[0030] The adjusting member includes a hydraulic jacking member 6, the base of which is arranged on the cross arm 8, and the top of which is movably connected to the suspension beam 3, that is, the lifting rod in the hydraulic jacking member 6 and the suspension beam 3 are connected in a rotating manner, a sliding bearing is installed at the rear of the suspension beam, and the lifting rod is connected to the suspension beam 3 through a secondary shaft and a sliding bearing. In other words, the top of the hydraulic jacking member is connected to the straight end of the suspension beam, and when the lifting rod in the hydraulic jacking member is extended or retracted, the base of the hydraulic jacking member drives the cross arm to descend or rise relative to the suspension beam, and when the cross arm moves, the casing and the rotor synchronously follow the movement of the cross arm, thereby completing the adjustment of the rotor. It should be noted that the hydraulic jacking member in this embodiment is a hand-cranked type, and an operating handle is arranged at the tail end of the cross arm, so as to facilitate manual adjustment of the rotor position when the rotor is pulled through.

[0031] When in use, adjust the position of the lifting ring to be above the vertical line of the center of gravity of the motor rotor according to the size and shape of the motor, and lock the lifting ring pin; then retract the pressure-relieving lifting rod of the hydraulic jacking device, and then hang the lifting ring of the special tool on the hook of the lifting device, and operate the lifting device to lift the special tool to the horizontal position of the cross arm and the motor shaft; then insert the motor shaft extension into the front end sleeve of the cross arm of the special tool, adjust it front and back, left and right, to ensure that the inner wall of the tile-type movable bushing fits tightly with the motor shaft extension, and use a special wrench to tighten the bushing adjustment bolt to firmly fix the tile-type movable bushing, the bushing and the motor shaft extension; slowly operate the lifting equipment to lift the special tool for pulling the motor through the rotor to a stressed state, operate the hydraulic jacking device, and accurately adjust the coaxiality of the motor stator and rotor to make the upper and lower left and right gaps of the stator and rotor the same; finally, operate the lifting equipment smoothly to move horizontally to lift the rotor out of the stator.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A motor maintenance rotor lifting tool, characterized in that: It includes a hanging beam, which is detachably provided with a hanging ring. The hanging beam is movably connected to a cantilever. One end of the cantilever is provided with a clamping piece for clamping rotors with different shaft diameters. The other end of the cantilever is provided with an adjusting piece for adjusting the orientation of the cantilever and the rotor. The adjusting piece is movably connected to the hanging beam.

2. The motor maintenance rotor lifting tool according to claim 1, characterized in that: A plurality of mounting holes are provided on the top of the hanging beam, and connecting holes corresponding to the mounting holes are provided on the hanging ring, and the mounting holes are connected to the connecting holes through pin shafts.

3. The motor maintenance rotor lifting tool according to claim 1, characterized in that: The cantilever includes a vertical arm and a horizontal arm, one end of the vertical arm is movably connected to the suspension beam, and the other end of the vertical arm is connected to the horizontal arm; the clamping piece is arranged at one end of the horizontal arm, and the adjusting piece is arranged at the other end of the horizontal arm.

4. The motor maintenance rotor lifting tool according to claim 3, characterized in that: The clamping piece includes a sleeve, which is arranged at one end of the cross arm. Bushings are symmetrically arranged in the sleeve, and a movable bushing is arranged in the bushing. A fastening bolt is passed between the sleeve and the bushing to adjust the distance between the bushings.

5. The motor maintenance rotor lifting tool according to claim 3, characterized in that: The adjusting member comprises a hydraulic jacking member, the base of which is arranged on the cross arm, and the top of which is movably connected to the suspension beam.

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