Rotor centering mechanism

Abstract

The utility model belongs to the technical field of motor maintenance tools, and particularly relates to a rotor centering mechanism, which comprises a centering rod, and the end part of the centering rod is provided with a positioning piece for circumferentially positioning a rotor shaft; and the lifting mechanism is used for driving the centering rod to vertically lift. According to the utility model, the rotor shaft offset caused by the bearing clearance can be effectively avoided, and the rotor shaft is kept vertical, so that the damage to the product caused by the mutual adsorption of the stator and the rotor due to magnetic force in the disassembly and assembly process is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of motor maintenance tooling technology, specifically relating to a rotor centering mechanism. Background Technology

[0002] An electric motor consists of a stator and a rotor. During motor maintenance, it is necessary to separate the stator and rotor. Current technology typically involves placing the motor horizontally and then using a center to push the rotor out of the stator. However, due to gravity, the rotor is prone to attracting the stator, and the rotor is easily scratched during the pushing process, leading to a shortened lifespan or even rendering it unusable. To avoid scratching the rotor, the stator and rotor need to be disassembled vertically. To ensure smooth vertical disassembly, a device that can keep the rotor vertical is required. Utility Model Content

[0003] This application provides a rotor alignment mechanism to solve related technical problems.

[0004] This utility model is achieved through the following technical solution:

[0005] A rotor centering mechanism, comprising:

[0006] The centering rod has a positioning element at its end for circumferentially positioning the rotor shaft;

[0007] A lifting mechanism is provided to drive the centering rod to move vertically up and down.

[0008] The centering rod uses positioning components to circumferentially position the rotor shaft, preventing circumferential wobbling and axial tilting, thus ensuring the rotor shaft remains vertical. A lifting mechanism drives the centering rod to rise and fall, allowing it to mate with or separate rotor shafts of different lengths.

[0009] Furthermore, the positioning element is a sleeve or a positioning pin.

[0010] The sleeve can circumferentially position the rotor shaft on the rotor shaft through the kit, while the locating pin can circumferentially position it by snapping into the pin hole on the rotor shaft.

[0011] Furthermore, it also includes a vertical frame for mounting the centering rod and the lifting mechanism.

[0012] Furthermore, the vertical frame includes a top plate and several columns supporting the top plate.

[0013] Furthermore, the lifting mechanism includes a bevel gear transmission mechanism, a stationary plate, a moving plate, and a guide rod;

[0014] The stationary plate is fixedly connected to the bottom surface of the top plate via a connecting rod;

[0015] The guide rod passes through the stationary plate and the top plate, and is slidably connected to the stationary plate;

[0016] The movable plate is disposed below the stationary plate and is fixedly connected to the guide rod;

[0017] The bevel gear transmission mechanism is mounted on the moving plate and is used to drive the centering rod to move vertically up and down.

[0018] Furthermore, the top plate is provided with a skylight structure for passage of the centering rod and the guide rod.

[0019] By incorporating a skylight structure, it is easier to smoothly raise and lower the center rod and guide rod, and it also reduces the weight of the roof slab.

[0020] Furthermore, it also includes a guide sleeve, which is fixed to the stationary plate, and the guide rod is slidably connected to the stationary plate through the guide sleeve.

[0021] The guide sleeve can extend the guide path of the stationary plate to the guide rod, making the guiding process smoother.

[0022] Furthermore, the bevel gear transmission mechanism includes a first bevel gear, a second bevel gear, and a rotary handle;

[0023] The centering rod passes through the top plate, the stationary plate, and the third moving plate, and is threadedly connected to the stationary plate.

[0024] The first bevel gear is sleeved on the centering rod and is tightly fitted to the centering rod;

[0025] The rotating handle drives the first bevel gear to rotate horizontally via the second bevel gear, and causes the centering rod to rise and fall vertically.

[0026] When the handle is rotated, it drives the second bevel gear to rotate in the vertical plane. The second bevel gear then drives the first bevel gear to rotate horizontally. Since the first bevel gear is tightly connected to the centering rod, the centering rod will rotate horizontally with the first bevel gear. Since the centering rod is threadedly connected to the stationary plate, the centering rod can move up and down relative to the stationary plate when it rotates. When the centering rod moves up and down, it also drives the moving plate and the bevel gear transmission mechanism to move up and down.

[0027] Furthermore, it also includes a pressure alarm, which is used to collect the pressure exerted by the centering rod on the rotor shaft and to issue an alarm when the pressure exceeds a pressure threshold.

[0028] The pressure of the centering rod on the upper shoulder of the rotor shaft is transmitted to the inner ring of the bearing at the lower end of the rotor shaft. Pressing the inner ring of the bearing can prevent shaft tilting caused by bearing clearance. When the pressure alarm sounds, it indicates that the inner ring of the bearing has been pressed, which improves the reliability and convenience of the centering operation.

[0029] Furthermore, the pressure alarm includes a pressure sensor and a pressure plate, with the pressure sensor mounted on the movable plate; the pressure plate is fixed to the centering rod and is used to press the pressure sensor.

[0030] This invention can effectively avoid rotor shaft misalignment caused by bearing clearance, keep the rotor shaft vertical, and thus avoid damage to the product caused by the stator and rotor being attracted together by magnetic force during disassembly and assembly. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the rotor centering mechanism in this specific embodiment;

[0033] Figure 2 This is a schematic diagram of the rotor alignment mechanism correcting the rotor axis in this specific embodiment;

[0034] Figure 3 This is a schematic diagram of the force transmission between the center rod and the rotor shaft in this specific embodiment. Detailed Implementation

[0035] To avoid scratching the rotor, the stator and rotor need to be disassembled and assembled vertically. To ensure the smooth vertical disassembly and assembly, a device that can keep the rotor vertical is required.

[0036] The rotor alignment mechanism provided in this specific embodiment can effectively avoid rotor shaft misalignment caused by bearing clearance, keep the rotor shaft vertical, and thus prevent the stator and rotor from being attracted together by magnetic force during disassembly and assembly, which would damage the product.

[0037] refer to Figure 1 As shown, the rotor centering mechanism provided in this specific embodiment includes:

[0038] The centering rod 101 has a positioning element at its end for circumferentially positioning the rotor shaft.

[0039] A lifting mechanism is provided to drive the centering rod 101 to move vertically up and down.

[0040] The centering rod 101 uses positioning components to circumferentially position the rotor shaft, preventing circumferential wobbling and axial tilting, thus ensuring the rotor shaft remains vertical. A lifting mechanism drives the centering rod 101 to rise and fall, allowing it to mate with or separate rotor shafts of different lengths.

[0041] In this specific embodiment, the positioning element is a sleeve or a positioning pin. The sleeve can circumferentially position the rotor shaft on the rotor shaft through the fitting, while the positioning pin can circumferentially position it by engaging with a pin hole on the rotor shaft.

[0042] In this specific embodiment, a vertical frame is also included, which is used to install the centering rod 101 and the lifting mechanism.

[0043] In this specific embodiment, the vertical frame includes a top plate 105 and a plurality of columns 1010 supporting the top plate 105.

[0044] In this specific embodiment, the lifting mechanism includes a bevel gear transmission mechanism 106, a stationary plate 104, a moving plate 103, and a guide rod 107;

[0045] The stationary plate 104 is fixedly connected to the bottom surface of the top plate 105 via a connecting rod;

[0046] The guide rod 107 passes through the stationary plate 104 and the top plate 105, and is slidably connected to the stationary plate 104;

[0047] The movable plate 103 is disposed below the stationary plate 104 and is fixedly connected to the guide rod 107;

[0048] The bevel gear transmission mechanism 106 is mounted on the moving plate 103 and is used to drive the centering rod 101 to move vertically up and down.

[0049] In this specific embodiment, the top plate 105 is provided with a skylight structure for the passage of the centering rod 101 and the guide rod 107.

[0050] By setting up a skylight structure, it is easy to raise and lower the center rod 101 and the guide rod 107 smoothly, and it can also reduce the weight of the top plate 105.

[0051] In this specific embodiment, a guide sleeve 10701 is also included. The guide sleeve 10701 is fixed on the stationary plate 104, and the guide rod 107 is slidably connected to the stationary plate 104 through the guide sleeve 10701.

[0052] The guide sleeve 10701 can extend the guide path of the stationary plate 104 to the guide rod 107, making the guiding process smoother.

[0053] In this specific embodiment, the bevel gear transmission mechanism 106 includes a first bevel gear, a second bevel gear, and a rotary handle 102;

[0054] The centering rod 101 passes through the top plate 105, the stationary plate 104 and the third moving plate 103, and is threadedly connected to the stationary plate 104;

[0055] The first bevel gear is sleeved on the centering rod 101 and is tightly fitted to the centering rod 101;

[0056] The rotating handle 102 drives the first bevel gear to rotate horizontally via the second bevel gear, and drives the centering rod 101 to rise and fall vertically.

[0057] When the rotating handle 102 is rotated, it drives the second bevel gear to rotate in the vertical plane. The second bevel gear then drives the first bevel gear to rotate horizontally. Since the first bevel gear is tightly connected to the centering rod 101, the centering rod 101 will rotate horizontally with the first bevel gear. Since the centering rod 101 is threadedly connected to the stationary plate 104, the centering rod 101 can move up and down relative to the stationary plate 104 when it rotates. When the centering rod 101 moves up and down, it also drives the moving plate 103 and the bevel gear transmission mechanism 106 to move up and down.

[0058] In this specific embodiment, a pressure alarm is also included, which is used to collect the pressure exerted by the centering rod 101 on the rotor shaft and to issue an alarm when the pressure exceeds the pressure threshold.

[0059] refer to Figure 2 and Figure 3 As shown, after the rotor 2 is placed on the centering position, the centering rod 101 is lowered by the lifting mechanism. The sleeve 10101 on the centering rod 101 circumferentially positions the rotor shaft 201. The pressure of the centering rod 101 on the upper shoulder of the rotor shaft 201 is transmitted to the inner ring of the bearing 3 at the lower end of the rotor shaft. Pressing the inner ring of the bearing can prevent the shaft from tilting due to bearing clearance. When the pressure alarm sounds, it indicates that the inner ring of the bearing has been pressed, which improves the reliability and convenience of the centering operation.

[0060] In this specific embodiment, the pressure alarm includes a pressure sensor 108 and a pressure plate 109. The pressure sensor 108 is disposed on the moving plate 103; the pressure plate 109 is fixed on the centering rod 101 and is used to press the pressure sensor 108.

[0061] In this specific embodiment, the pressure sensor is fixed to the moving plate 103 by a pad; the pressure sensor is an annular pressure sensor; the bottom of the pressure plate 109 is provided with a pressure block for squeezing the pressure sensor; the pressure plate 109 is fixedly connected to the moving plate 103 by a positioning post; the positioning post axially passes through the pressure block, the pressure sensor and the pad.

[0062] The moving plate 103, pressure sensor 108 and pressure plate 109 are connected as one unit by the positioning column, which ensures that the pressure sensor is subjected to axial force so as to accurately collect pressure value.

[0063] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this application.

Claims

1. A rotor centering mechanism, characterized in that, include: The centering rod has a positioning element at its end for circumferentially positioning the rotor shaft; A lifting mechanism is provided to drive the centering rod to move vertically up and down.

2. The rotor centering mechanism according to claim 1, characterized in that, The positioning element is a sleeve or a positioning pin.

3. The rotor centering mechanism according to claim 1, characterized in that, It also includes a vertical frame for mounting the centering rod and the lifting mechanism.

4. The rotor centering mechanism according to claim 3, characterized in that, The vertical frame includes a top plate and several columns supporting the top plate.

5. The rotor centering mechanism according to claim 4, characterized in that, The lifting mechanism includes a bevel gear transmission mechanism, a stationary plate, a moving plate, and a guide rod; The stationary plate is fixedly connected to the bottom surface of the top plate via a connecting rod; The guide rod passes through the stationary plate and the top plate, and is slidably connected to the stationary plate; The movable plate is disposed below the stationary plate and is fixedly connected to the guide rod; The bevel gear transmission mechanism is mounted on the moving plate and is used to drive the centering rod to move vertically up and down.

6. The rotor centering mechanism according to claim 5, characterized in that, The top plate is provided with a skylight structure for the passage of the centering rod and the guide rod.

7. The rotor centering mechanism according to claim 5, characterized in that, It also includes a guide sleeve, which is fixed to the stationary plate, and the guide rod is slidably connected to the stationary plate through the guide sleeve.

8. The rotor centering mechanism according to claim 5, characterized in that, The bevel gear transmission mechanism includes a first bevel gear, a second bevel gear, and a rotary handle; The centering rod passes through the top plate, the stationary plate, and the third moving plate, and is threadedly connected to the stationary plate. The first bevel gear is sleeved on the centering rod and is tightly fitted to the centering rod; The rotating handle drives the first bevel gear to rotate horizontally via the second bevel gear, and causes the centering rod to rise and fall vertically.

9. The rotor centering mechanism according to claim 5, characterized in that, It also includes a pressure alarm, which is used to collect the pressure exerted by the centering rod on the rotor shaft and issue an alarm when the pressure exceeds the pressure threshold.

10. The rotor centering mechanism according to claim 9, characterized in that, The pressure alarm includes a pressure sensor and a pressure plate. The pressure sensor is mounted on the moving plate. The pressure plate is fixed to the centering rod and is used to press the pressure sensor.

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