Permanent magnet motor dismounting tool

Abstract

The utility model relates to the technical field of motor assembly, in particular to a permanent magnet motor dismounting tool. The permanent magnet motor disassembling and assembling tool comprises a base, the base is provided with a fixing structure used for fixing a motor, a left ejector rod and a right ejector rod, the left ejector rod and the right ejector rod are movably installed on the base in the left-right direction, the base is further provided with a rotor lifting mechanism, and the rotor lifting mechanism is provided with a lifting face used for making contact with the peripheral face of a rotor in a lifting mode. In the disassembly and assembly process, the lifting face lifts the rotor, so that the jacking acting force of the rotor center shaft, the stator center shaft, the left jacking rod and the right jacking rod is located on the same straight line. In the rotor moving process, the rotor lifting mechanism always provides a lifting effect on the rotor, it can be guaranteed that the jacking acting force of a rotor center shaft, a stator center shaft, a left jacking rod and a right jacking rod is located on the same straight line all the time, the rotor is reliably fixed in an overhead mode, and therefore it is guaranteed that the rotor does axial linear motion all the time; and abrasion or collision damage caused by rotor deflection is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of motor assembly, in particular to a permanent magnet motor disassembly and assembly tool. Background Art

[0002] At present, in order to achieve the purpose of environmental protection and energy saving, the oil field has replaced more than 1,000 YE3 series permanent magnet motors for various oil production plants. The main components of the permanent magnet motor include the housing, flange, stator, rotor, etc. The stator is mainly composed of the stator core, coil and skeleton, etc. The rotor is mainly composed of the rotor core and permanent magnets. The permanent magnet is assembled in the rotor core slot, the stator is fixedly installed inside the housing, and the rotor is arranged inside the stator. There is an air gap of about 1mm between the stator and the rotor, so that the rotor rotates under the action of magnetic force. Since the rotor of the permanent magnet motor is equipped with permanent magnets, the magnetism of the permanent magnets is very strong, and there is a certain intensity of magnetic field in the outer circle of the rotor and the surrounding space, the stator and the rotor produce uneven attraction during the disassembly process. These uneven attractions are the difficulties in disassembling the stator and the rotor. Unreasonable disassembly may cause wear of the inner and outer walls of the stator and the rotor, affect the insulation and rust resistance of the stator and rotor punchings, and eventually cause equipment damage. Moreover, since the suction force between the stator and the rotor is very large, it is more difficult to separate the stator and the rotor. When using external force to disassemble and install the rotor and the stator, it is very easy to cause maintenance personnel to be squeezed and bruised, and the original equipment parts to be damaged.

[0003] The Chinese utility model patent with authorization announcement number CN207382143U discloses a special tool for disassembling and assembling a permanent magnet motor. The tool includes a base, on which a rotor bracket and a stator moving platform (i.e., a fixing structure for fixing the motor) are provided. A stator fixing frame is provided on the stator moving platform. A moving platform traction screw is threadedly assembled on the stator moving platform. A rotor fixing screw (i.e., a left and right push rod) is threadedly assembled on the rotor bracket. When the rotor needs to be separated from the stator, the motor is first fixed to the stator moving platform, and then the rotor fixing screw is adjusted to tighten the rotor from the left and right sides to fix the rotor in the air, so that a rotation gap is maintained between the rotor and the stator, and then the moving platform traction screw is rotated to make the stator moving platform move evenly, thereby separating the rotor from the stator.

[0004] When the above-mentioned existing special tools for disassembly and assembly are used, the rotor is fixed in the air by tightening the rotor fixing screws assembled on the two relatively arranged rotor brackets against the shaft heads at both ends of the rotor. When the motor size is small, the rotor weight is small, and the demand for the rotor to be fixed in the air can be met to ensure the coaxiality of the rotor and the stator during the disassembly and assembly process. However, when the motor size is large, such as the YE3 series permanent magnet motor currently used in oil fields, the rotor weight is large. At this time, the rotor is only fixed in the air by tightening the rotor fixing screws assembled on the two rotor brackets against the axial ends of the rotor. The fixing reliability is very poor, and the coaxiality of the rotor and the stator is difficult to ensure during the assembly and disassembly process. It is easy for the rotor to fail to be fixed in the air, resulting in the rotor being skewed or falling and being damaged. Utility Model Content

[0005] The utility model aims to provide a permanent magnet motor disassembly and assembly tool to solve the problem that the existing permanent magnet motor disassembly and assembly special tools have poor reliability in fixing the rotor overhead when used in large-size motors, and the coaxiality of the rotor and the stator is difficult to ensure.

[0006] In order to achieve the above purpose, the utility model permanent magnet motor disassembly and assembly tool adopts the following technical solutions:

[0007] A permanent magnet motor disassembly and assembly tool comprises a base, on which is provided a fixing structure for fixing the motor and left and right push rods for tightening the two ends of a rotor from the left and right sides respectively, the left and right push rods are movably mounted on the base along the left and right directions, and a rotor lifting mechanism is also provided on the base, the rotor lifting mechanism is on the disassembly and assembly moving path of the rotor, the rotor lifting mechanism has a lifting surface for lifting contact with the outer peripheral surface of the rotor, and during the disassembly and assembly process, the lifting surface lifts the rotor so that the rotor center axis, the stator center axis and the tightening forces of the left and right push rods are in the same straight line.

[0008] Beneficial effects: The utility model permanent magnet motor disassembly and assembly tool is improved on the basis of the existing permanent magnet motor disassembly and assembly special tools, and belongs to an improved invention. The base is used as the installation base of the disassembly and assembly tool, and a fixed structure and left and right push rods are installed on the base. The fixed structure is used to fix the motor. The two push rods are movably installed on the base along the left and right directions. The two push rods are used to tighten the two ends of the rotor from the left and right sides. A rotor lifting mechanism is also provided on the base, and the rotor lifting mechanism is on the rotor disassembly and assembly moving path. When the rotor and stator need to be separated or assembled, the motor is fixed on the fixed structure, and the left and right push rods are adjusted so that the left and right push rods press the two ends of the rotor from the left and right sides at the same time, and then the rotor is pushed to make axial linear motion. During the movement of the rotor, the rotor lifting mechanism can provide a lifting effect on the rotor, thereby ensuring that the rotor center axis, the stator center axis and the pressing force of the left and right push rods are always in the same straight line, and the rotor is reliably fixed overhead. The rotor lifting mechanism not only lifts the rotor, but also straightens the rotor, thereby ensuring that the rotor always makes axial linear motion during the disassembly and assembly process, and a gap can be always maintained between the rotor and the stator to ensure the coaxiality of the two, and avoid rotor deviation caused by wear or collision damage.

[0009] Furthermore, the rotor lifting mechanism includes a tray and two or more rollers arranged on the tray and spaced apart along the rotor disassembly and assembly path. The rollers are rotatably assembled on the tray, with the rotation axis extending in the front-rear direction, and the outer peripheral surface of the rollers constitutes the lifting surface.

[0010] Furthermore, the rotor lifting mechanism is also provided with a limiting portion, which is located at the front and rear sides of the lifting surface to limit the rotor in the front and rear directions.

[0011] Furthermore, the outer peripheral surface of the roller is a concave surface which is low in the middle and high at both ends, and the parts of the two ends of the roller that are higher than the middle part constitute the limiting part.

[0012] Furthermore, the roller is a magnetic isolation roller to isolate the magnetic field between the rotor and the base.

[0013] Furthermore, the rotor lifting mechanism and the fixing structure are arranged closely.

[0014] Furthermore, the rotor lifting mechanism is provided with one and is located between the fixing structure and the push rod on one side.

[0015] Furthermore, one end of the left and right push rods for tight contact with the rotor is provided with a stabilizing sleeve, and the stabilizing sleeve is used to be sleeved on the outside of the rotor shaft head and to be clearance-matched with the rotor shaft head.

[0016] Furthermore, the left and right push rods are both screw rods, and the screw rods are threadedly mounted on the base to achieve movement in the left and right directions.

[0017] Furthermore, the permanent magnet motor disassembly and assembly tool also includes a gasket, which is used to be installed at the bottom of the rotor lifting mechanism to increase the lifting height of the rotor lifting mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a specific embodiment of the permanent magnet motor disassembly and assembly tool of the utility model;

[0019] Figure 2 It is a top view of a specific embodiment of the permanent magnet motor disassembly and assembly tool of the utility model;

[0020] In the figure: 1. base; 101. bottom plate; 102. vertical plate; 201. push rod; 202. straightening sleeve; 203. force hole; 204. nut; 3. fixed support plate; 4. rotor lifting mechanism; 401. tray; 402. roller; 403. lifting surface; 404. limit part; 5. motor; 501. rotor; 502. rotor shaft head. DETAILED DESCRIPTION

[0021] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0022] Existing special tools for disassembling and assembling permanent magnet motors can be used for small-sized motors. When used for large-sized motors, the reliability of the rotor overhead fixation is poor, the coaxiality of the rotor and the stator is difficult to ensure, and the rotor is easily deflected during the disassembly process, resulting in wear or collision damage. In order to solve this problem, the specific scheme principle of the permanent magnet motor disassembly and assembly tool of the utility model is as follows: a fixing structure and left and right push rods for fixing the motor are arranged on the base, and the two push rods are used to tighten the two ends of the rotor from the left and right sides. On this basis, the two push rods are movably installed on the base along the left and right directions, and a rotor lifting mechanism is added to the base, so that the rotor lifting mechanism is on the rotor disassembly and assembly moving path. When the rotor and the stator need to be separated or assembled, the motor is fixed on the fixed structure, and the two push rods are adjusted so that the two push rods simultaneously tighten the two ends of the rotor from the left and right sides, and then the rotor is pushed to make axial linear motion. During the movement of the rotor, the rotor lifting mechanism provides a lifting effect on the rotor, thereby ensuring that the rotor center axis, the stator center axis and the tightening force of the left and right push rods are always in the same straight line, and the rotor is reliably fixed overhead. The rotor lifting mechanism not only lifts the rotor, but also straightens the rotor, thereby ensuring that the rotor always makes axial linear motion during the disassembly and assembly process, and the gap between the rotor and the stator can always be maintained to ensure the coaxiality of the two, and avoid the rotor deflection and causing wear or collision damage.

[0023] Based on the principle of the above scheme, the following focuses on the specific embodiment of the permanent magnet motor disassembly and assembly tool of the utility model:

[0024] like Figure 1-2As shown, the permanent magnet motor disassembly and assembly tool includes a base 1, on which a fixing structure for fixing the motor 5 and two push rods 201 for tightening the two ends of the rotor 501 from the left and right sides are respectively provided. The two push rods 201 are respectively located on the left and right sides of the fixing structure. The push rod 201 located on the left side is defined as the left push rod, and the push rod 201 located on the right side is defined as the right push rod. The fixing structure is used to fix the motor 5 on the base 1 in a horizontal posture. The fixing structure includes a fixing support plate 3, which is fixed on the base 1. The fixing support plate 3 is provided with bolt mounting holes. After the motor 5 is placed on the fixing support plate 3, the motor housing can be fixedly connected to the fixing support plate 3 by bolts. The base 1 includes a bottom plate 101 and two left and right opposite vertical plates 102 vertically arranged on the bottom plate 101. The bottom plate 101 is a rectangular plate. The two push rods 201 are respectively movably mounted on the two vertical plates 102 along the left and right directions. The two push rods 201 are opposite to each other. After the motor 5 is fixed on the base 1, the two push rods 201 can respectively press the axial ends of the rotor 501 from the left and right sides. Since the motor 5 is fixed on the base 1 in a horizontal posture, the central axis of the rotor 501 extends in the horizontal direction. Figure 1 Taking the middle angle as a reference, the central axis of the rotor 501 extends in the left-right direction, and the disassembly and assembly movement direction of the rotor 501 is the left-right direction. The base 1 is also provided with a rotor lifting mechanism 4, which is located on the disassembly and assembly movement path of the rotor 501. The rotor lifting mechanism 4 has a lifting surface 403 for lifting and contacting with the outer peripheral surface of the rotor 501. During the disassembly and assembly process, the lifting surface 403 lifts the rotor 501 so that the rotor center axis, the stator center axis and the tightening force of the left and right push rods are in the same straight line.

[0025] like Figure 1As shown in , the rotor lifting mechanism 4 is provided with a and is located between the fixed structure and the right push rod. When the rotor 501 needs to be separated from the stator, the motor 5 is fixed on the fixed structure, so that the left and right push rods press the two ends of the rotor 501 from the left and right sides and then push the rotor 501 to the right for axial linear motion, and the rotor 501 is gradually separated from the stator. The rotor 501 is lifted by the rotor lifting mechanism 4, and the lifting height is sufficient to make the rotor center axis, the stator center axis and the pressing force of the left and right push rods in the same straight line, so as to ensure the coaxiality of the rotor 501 and the stator during the separation process; when the rotor 501 needs to be assembled with the stator, the motor housing (stator The rotor 501 is fixed inside the motor housing) and is fixed on a fixed structure, and the rotor 501 is placed on the rotor lifting mechanism 4. The lifting height of the rotor lifting mechanism 4 satisfies the requirement that the central axis of the rotor, the central axis of the stator and the tightening forces of the left and right push rods are in the same straight line, so that the left and right push rods tighten the two ends of the rotor 501 from the left and right sides, and then push the rotor 501 to the left for axial linear motion, and the rotor 501 gradually enters the stator. During the entry of the rotor 501, the rotor 501 is lifted by the rotor lifting mechanism 4, thereby ensuring the coaxiality of the rotor 501 and the stator during the assembly process.

[0026] Of course, in other embodiments, the rotor lifting mechanism 4 can also be located between the fixed structure and the left top rod. When the rotor 501 needs to be separated from the stator, the rotor 501 is pushed to the left for axial linear motion; when the rotor 501 needs to be assembled with the stator, the rotor 501 is placed on the rotor lifting mechanism 4, and the rotor 501 is pushed to the right for axial linear motion. The advantage of setting a rotor lifting mechanism 4 is that the rotor 501 enters and exits from the same side during installation and removal, which can reduce the size of the base 1, thereby reducing the overall volume of the disassembly tool, reducing the occupied area, and reducing the cost of the disassembly tool. Of course, in other embodiments, the rotor lifting mechanism 4 can also be set as two, one rotor lifting mechanism 4 is located between the fixed structure and the left top rod, and the other rotor lifting mechanism 4 is located between the fixed structure and the right top rod. At this time, when the rotor 501 is installed into the stator or the rotor 501 is separated from the stator, the entry and exit sides of the rotor 501 are not restricted. The rotor 501 can enter and exit from the same side, or enter from one side when installed, and separate from the other side when removed.

[0027] Preferably, if Figure 1As shown in , the rotor lifting mechanism 4 and the fixed structure are arranged close to each other. The advantage of such an arrangement is that when the rotor 501 is separated from the stator, the rotor 501 makes an axial linear motion relative to the stator, and the rotor 501 is gradually separated from the stator. The rotor lifting mechanism 4 can immediately come into contact with the rotor 501 to lift the rotor 501 at the moment when the rotor 501 is exposed from the motor housing, and continue to provide a lifting effect in the subsequent separation process; when the rotor 501 is assembled with the stator, before the rotor 501 enters the stator and during the process of the rotor 501 gradually entering the stator, the rotor lifting mechanism 4 continues to provide a lifting effect on the rotor 501 until the rotor 501 completely enters the stator, and the rotor lifting mechanism 4 is separated from the rotor 501; in this way, it is achieved that whether the rotor 501 is separated from the stator or the rotor 501 is assembled with the stator, the rotor lifting mechanism 4 can always provide a lifting effect during the movement of the rotor 501, so as to always keep the rotor center axis, the stator center axis and the tightening force of the left and right push rods in the same straight line, and fully ensure that the rotor 501 always makes an axial linear motion during the disassembly and assembly process.

[0028] The rotor lifting mechanism 4 specifically includes a tray 401 and two or more rollers 402 arranged on the tray 401 and arranged at intervals along the disassembly and assembly path of the rotor 501. The rollers 402 are rotatably assembled on the tray 401, and the rotation axis extends along the front-back direction. The outer peripheral surface of the roller 402 constitutes a lifting surface 403 for lifting contact with the outer peripheral surface of the rotor 501. The tray 401 is a rectangular plate, and the tray 401 is fixed on the base 1. There are seven rollers 402, and the seven rollers 402 are arranged at intervals on the tray 401 along the disassembly and assembly path of the rotor 501. During the movement of the rotor 501, the outer peripheral surface of the rotor 501 rolls with the outer peripheral surface of the roller 402, and the roller 402 rolls around its axis. There is rolling friction between the outer peripheral surface of the roller 402 and the outer peripheral surface of the rotor 501, and the friction is small, thereby protecting the outer peripheral surface of the roller 402 and reducing the wear of the roller 402 that may be caused during the disassembly and assembly process. Of course, the rotor lifting mechanism 4 is not limited to this structure. For example, in other embodiments, the rotor lifting mechanism 4 can be a rectangular support plate, and the rotor 501 is lifted by the upper surface of the rectangular support plate. The upper surface of the rectangular support plate constitutes a lifting surface 403 for lifting and contacting the outer peripheral surface of the rotor 501. The upper surface of the rectangular support plate is processed so that the upper surface of the rectangular support plate is in sliding contact with the outer peripheral surface of the rotor 501. During the movement of the rotor 501, there is sliding friction between the rotor 501 and the rectangular support plate, and the friction can also be ensured to be small, thereby protecting the outer peripheral surface of the roller 402 and minimizing the wear on the roller 402 that may be caused during the disassembly and assembly process.

[0029] More optimally, the rotor lifting mechanism 4 is further provided with a limiting portion 404, and the limiting portion 404 is located at the front and rear sides of the lifting surface 403 to limit the rotor 501 in the front-to-back direction. By providing the limiting portion 404, when the rotor 501 is lifted on the lifting surface 403, the limiting portion 404 limits the rotor 501 from the front and rear sides, which can further prevent the rotor 501 from being displaced in the front-to-back direction and causing the central axis of the rotor 501 to be offset, thereby further ensuring the coaxiality of the rotor 501 and the stator, and ensuring that the rotor 501 performs axial linear motion during the movement. Specifically, as Figure 1 As shown in , the outer peripheral surface of the roller 402 is a concave surface with a lower middle and higher ends, and the parts of the roller 402 that are higher than the middle part constitute the limiting part 404. When the rotor 501 is lifted on the roller 402, the lower middle part of the roller 402 provides support for the rotor 501, and the higher parts of the roller 402 at both ends form a structure similar to a rib, providing a stop and limit for the rotor 501 from the front and rear sides. Of course, in other embodiments, the roller 402 can also be a cylindrical shape with the same size in each part. In this case, two rows of limiting plates can be separately provided on the support plate, and the two rows of limiting plates are relatively arranged on the front and rear sides of each roller 402, and the rotor 501 is limited in the front and rear directions by the limiting plates on both sides.

[0030] Since the rotor 501 itself is equipped with permanent magnets, the magnetism of the permanent magnets is very strong, and the base 1 and the fixed structure and the rotor lifting mechanism 4 installed on the base 1 are usually made of metal. In order to prevent the rotor 501 from being attracted to the base 1 and the structures installed on the base 1, each roller 402 is set as a magnetic isolation roller 402 to isolate the magnetic field between the rotor 501 and the base 1, thereby ensuring that the rotor 501 can move smoothly. The magnetic isolation roller 402 can be made of nylon rods to ensure magnetic isolation performance. Of course, in other embodiments, the roller 402 itself may not be made of magnetic isolation material, but a layer of magnetic isolation film is wrapped on the outer circumference of the roller 402 to isolate the magnetic field between the rotor 501 and the base 1.

[0031] In this embodiment, both the left and right push rods are screw rods, which are respectively threadedly mounted on the two vertical plates 102 of the base 1 to achieve movement in the left and right directions. A nut 204 is provided on the vertical plate 102, and the screw rod is threadedly mounted in the nut 204. When the screw rod is rotated, the screw rod will move linearly along its axial direction. By rotating the screw rod, the screw rod is pressed against the rotor shaft head 502 and pushes the rotor 501 to move axially. The rotor shaft heads 502 at both ends of the rotor 501 protrude from the ends of the rotor 501 in the axial direction, and the screw rod can be directly pressed against the rotor shaft head 502. When the rotor 501 needs to be installed in the stator, the left and right push rods are adjusted to press the rotor shaft head 502 from the left and right ends, and the right push rod is continued to be rotated to move to the left, and the left push rod is rotated to move to the left at the same time, and the left and right push rods move to the left synchronously to ensure that the two ends of the rotor 501 are always pressed during the movement, so that the rotor 501 is pushed into the stator to achieve assembly; when the rotor 501 needs to be separated from the stator, the left and right push rods are adjusted to press the rotor shaft head 502 from the left and right ends, and the left push rod is continued to be rotated to move to the right, and the right push rod is rotated to move to the right at the same time, and the left and right push rods move to the right synchronously to ensure that the two ends of the rotor 501 are always pressed during the movement, so that the rotor 501 is pushed out of the stator to achieve separation. The left and right push rods are both screw rods, and the adjustment is very convenient when adjusting the distance between the two to press the two ends of the rotor 501. Taking the separation of the rotor 501 from the stator as an example, in this process, the left and right push rods press the two ends of the rotor 501 tightly, the left push rod also acts as a push mechanism to push the rotor 501 to move to the right, and the right push rod also acts as a straightening mechanism to straighten the rotor 501 from the right end; similarly, in the process of installing the rotor 501 into the stator, the left and right push rods press the two ends of the rotor 501 tightly, the right push rod also acts as a push mechanism to push the rotor 501 to move to the left, and the left push rod also acts as a straightening mechanism to straighten the rotor 501 from the left end. In addition to playing a tightening role, the left and right push rods in this embodiment are also used as a push mechanism or a straightening mechanism during the disassembly and assembly process, and there is no need to configure a separate push mechanism, which simplifies the overall structure of the disassembly and assembly tool and reduces the tool cost. The disassembly and assembly process requires two people to work together to make the pitches of the two push rods 201 the same. During the disassembly and assembly, they shout slogans and proceed at the same time to ensure that the push rods 201 on both sides are rotated the same number of times each time, thereby ensuring that the push rods 201 on both sides move synchronously.

[0032] Of course, in other embodiments, the left and right push rods may also adopt other structures, for example, the push rod 201 on one side is a screw, which is threadedly mounted on the vertical plate 102 on one side of the base 1, and the push rod 201 on the other side is a smooth rod, which is fixedly mounted on the vertical plate 102 on the other side of the base 1, the screw and the smooth rod are coaxially arranged, and the two vertical plates 102 are movably mounted on the bottom plate 101 along the left and right directions (the disassembly and assembly movement direction of the rotor 501), and a locking connecting rod is connected between the two vertical plates 102. When the two push rods 201 press against both ends of the rotor 501 Then, the locking link is locked to fix the distance between the two vertical plates 102, and the two vertical plates 102 will move synchronously to ensure that the two push rods 201 always press against the two ends of the rotor 501. At this time, a pushing mechanism is also configured on the base 1, and the pushing mechanism is used to push the vertical plates 102 on both sides and the push rods 201 on the vertical plates 102 on both sides to move together. The rotor 501 is pressed by the two push rods 201, so the rotor 501 moves with the two push rods 201, thereby pushing the rotor 501 into the stator or separating the rotor 501 from the stator.

[0033] Preferably, if Figure 1 As shown in , a stabilizing sleeve 202 is also provided at the taut end of the left and right push rods, i.e., the end used for taut contact with the rotor 501. The stabilizing sleeve 202 is used to be mounted on the outside of the rotor shaft head 502 and to be in clearance with the rotor shaft head 502. The inner circumference of the stabilizing sleeve 202 is in the same shape as the outer circumference of the rotor shaft head 502, so that it is more convenient to mount the stabilizing sleeve 202 on the rotor shaft head 502. By arranging the stabilizing sleeve 202 at the taut end of the push rod 201, the stabilizing sleeve 202 is mounted on the outside of the rotor shaft head 502 and to be in clearance with the rotor shaft head 502, compared with the structure of directly setting the taut end of the push rod as a tip and taut the rotor shaft head 502 through the tip, the contact area between the push rod 201 and the rotor shaft head 502 can be greatly increased, thereby greatly improving the taut reliability. The stabilizing sleeve 202 plays a certain stabilizing role on the rotor 501, and can further ensure that the central axis of the rotor 501 does not deflect, and ensure the coaxiality of the rotor 501 and the stator. Of course, in other embodiments, the stabilizing sleeve 202 may not be provided, and the end of the push rod 201 may be directly pressed against the rotor shaft head 502 .

[0034] In order to facilitate the application of force to the push rod 201, a screwing force applying part is further provided at the end of the push rod 201 away from the tightening end, and a rotational force is applied to the push rod 201 through the screwing force applying part. The screwing force applying part is specifically a force applying hole 203 provided on the push rod 201 and extending radially along the push rod 201. A force applying rod can be inserted into the force applying hole 203, and the force applying rod is rotated to drive the push rod 201 to rotate. Of course, an external hexagonal structure can also be provided at the end of the push rod 201 away from the tightening end, and a wrench can be used to clamp and apply force to the external hexagonal structure, thereby driving the push rod 201 to rotate. In this case, the external hexagonal structure constitutes the screwing force applying part; a hand wheel can also be provided at the end of the push rod 201 away from the tightening end, and the hand wheel can be rotated to drive the push rod 201 to rotate. In this case, the hand wheel constitutes the screwing force applying part.

[0035] Considering that there are two main types of YE3 series permanent magnet motors commonly used in oil fields, namely the YE3-250 series and the YE3-280 series, in order to make the permanent magnet motor disassembly and assembly tool of the utility model applicable to different types of permanent magnet motors, a gasket is also designed for the permanent magnet motor disassembly and assembly tool, and the gasket is used to be installed at the bottom of the rotor lifting mechanism 4 to increase the lifting height of the rotor lifting mechanism 4. For example, when it is necessary to disassemble and assemble the YE3-250 series permanent magnet motor, it is not necessary to pad the gasket; when it is necessary to disassemble and assemble the YE3-280 series permanent magnet motor, a 30mm high gasket is placed at the bottom of the rotor lifting mechanism 4 to increase the lifting height of the rotor lifting mechanism 4 by 30mm, thereby meeting the lifting requirements for the rotor 501.

[0036] The use process of the utility model permanent magnet motor disassembly and assembly tool is as follows:

[0037] When it is necessary to separate the rotor 501 from the stator, first fix the motor 5 on the fixed structure, then adjust the left and right push rods so that the left and right push rods simultaneously press the two ends of the rotor 501 from the left and right sides, then continue to rotate the two push rods synchronously to push the rotor 501 to the right for axial linear motion, and the rotor 501 gradually separates from the stator, and the separated part of the rotor 501 contacts the lifting surface 403 of the rotor lifting mechanism 4, and the rotor 501 is lifted by the rotor lifting mechanism 4. As the rotor 501 continues to move outward, the lifting contact area between the rotor lifting mechanism 4 and the rotor 501 becomes larger and larger, until the rotor 501 is completely separated from the stator, and the rotor 501 is completely separated from the stator. The rotor 501 is entirely lifted on the rotor lifting mechanism 4. During the entire process of the rotor 501 moving outward and after the rotor 501 is completely separated from the stator, the rotor lifting mechanism 4 always provides a lifting effect on the rotor 501, which can ensure that the rotor center axis, the stator center axis and the tightening forces of the left and right push rods are always in the same straight line. The rotor lifting mechanism 4 not only lifts the rotor 501, but also straightens the rotor 501, thereby ensuring that the rotor 501 always makes axial linear motion during the disassembly process, and a gap can be always maintained between the rotor 501 and the stator to ensure the coaxiality of the two, thereby avoiding the rotor 501 from tilting and causing wear or collision damage.

[0038] When the rotor 501 needs to be installed into the stator, the rotor 501 is first placed on the rotor lifting mechanism 4, the motor 5 is fixed on the fixed structure, and then the left and right push rods are adjusted so that the left and right push rods simultaneously press the two ends of the rotor 501 from the left and right sides, and then the two push rods continue to rotate synchronously to push the rotor 501 to the left for axial linear motion, and the rotor 501 gradually enters the stator. During the movement of the rotor 501, the rotor lifting mechanism 4 always provides a lifting effect on the rotor 501, which can ensure that the rotor center axis, the stator center axis and the pressing force of the left and right push rods are always in the same straight line. The rotor lifting mechanism 4 not only lifts the rotor 501, but also straightens the rotor 501, thereby ensuring that the rotor 501 always makes axial linear motion during the assembly process, and a gap can be always maintained between the rotor 501 and the stator to ensure the coaxiality of the two, thereby avoiding the deflection of the rotor 501 and causing wear or collision damage.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A permanent magnet motor disassembly and assembly tool, comprising a base, on which is provided a fixing structure for fixing the motor and left and right push rods for tightening the two ends of the rotor from the left and right sides respectively, characterized in that: The left and right push rods are movably installed on the base in the left and right directions. A rotor lifting mechanism is also provided on the base. The rotor lifting mechanism is on the rotor disassembly and assembly moving path. The rotor lifting mechanism has a lifting surface for lifting contact with the outer peripheral surface of the rotor. During the disassembly and assembly process, the lifting surface lifts the rotor so that the rotor center axis, the stator center axis and the tightening forces of the left and right push rods are in the same straight line.

2. The permanent magnet motor disassembly and assembly tool according to claim 1, characterized in that: The rotor lifting mechanism includes a tray and two or more rollers arranged on the tray and spaced apart along the rotor disassembly and assembly movement path. The rollers are rotatably assembled on the tray, with the rotation axis extending in the front-rear direction. The outer peripheral surface of the rollers constitutes the lifting surface.

3. The permanent magnet motor disassembly and assembly tool according to claim 2, characterized in that: The rotor lifting mechanism is also provided with a limiting portion, which is located at the front and rear sides of the lifting surface to limit the rotor in the front and rear directions.

4. The permanent magnet motor disassembly and assembly tool according to claim 3, characterized in that: The outer peripheral surface of the roller is a concave surface with a lower middle and higher ends, and the parts of the two ends of the roller that are higher than the middle part constitute the limiting part.

5. The permanent magnet motor disassembly and assembly tool according to claim 2, characterized in that: The roller is a magnetic isolation roller to isolate the magnetic field between the rotor and the base.

6. The permanent magnet motor disassembly and assembly tool according to any one of claims 1 to 5, characterized in that: The rotor lifting mechanism and the fixing structure are arranged closely.

7. The permanent magnet motor disassembly and assembly tool according to any one of claims 1 to 5, characterized in that: The rotor lifting mechanism is provided with one and is located between the fixing structure and the top rod on one side.

8. The permanent magnet motor disassembly and assembly tool according to claim 1, characterized in that: The ends of the left and right push rods used for close contact with the rotor are provided with stabilizing sleeves, which are used for sleeve-fitting the outside of the rotor shaft head and having clearance fit with the rotor shaft head.

9. The permanent magnet motor disassembly and assembly tool according to claim 1, characterized in that: The left and right push rods are both screw rods, and the screw rod threads are installed on the base to achieve movement in the left and right directions.

10. The permanent magnet motor disassembly and assembly tool according to claim 1, characterized in that: The permanent magnet motor disassembly and assembly tool also includes a gasket, which is used to be installed at the bottom of the rotor lifting mechanism to increase the lifting height of the rotor lifting mechanism.

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