Magnetic suspension bearing radial sensor assembly, positioning device and magnetic suspension motor

Abstract

The utility model provides a magnetic suspension bearing radial sensor assembly, a positioning device and a magnetic suspension motor, and relates to the field of magnetic suspension bearings, the magnetic suspension bearing radial sensor assembly comprises a mounting seat, the mounting seat is provided with a mounting hole for a rotor to pass through; the sensor is mounted on the mounting seat, and the probe surface of the sensor faces the mounting hole so as to monitor the radial displacement of the rotor; the mounting base and the sensor are in threaded fit, and under the condition that the sensor rotates relative to the mounting base, the probe surface of the sensor can move in the direction close to / away from the mounting hole. The sensor is enabled to be coaxial at an electric signal detection layer, so that the condition that a physical layer is coaxially installed but the electric signal detection layer of the sensor is not coaxial is avoided, when the rotor is controlled to be coaxial, the control precision is higher, and the rotor can rotate at a higher speed.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic suspension bearings, in particular to a magnetic suspension bearing radial sensor component, a positioning device and a magnetic suspension motor. Background Art

[0002] The rotor of a magnetic levitation motor rotates at a very high speed when it is running at high speed. In order to prevent the rotor of the magnetic levitation motor from experiencing significant radial vibration and to achieve stable suspension of the rotor, it is necessary to monitor the radial displacement changes of the motor rotor during rotation in real time. When the change in radial displacement exceeds the preset threshold, it can be determined that radial vibration has occurred. At this time, measures must be taken immediately to actively suppress it to ensure that the rotor can operate at high speed in an extremely stable and quiet state.

[0003] Normally, the radial displacement of the motor's rotor is monitored by a non-contact method, that is, using sensors for real-time monitoring. Once the monitoring results show that the change in radial displacement exceeds the preset value, the suppression mechanism must be activated in time to effectively control the radial jitter and ensure that the motor's rotor remains in the best operating state. Usually, four radially evenly arranged displacement sensors are installed near the radial magnetic bearing, and before the equipment is put into operation, the sensors must be calibrated to ensure the accuracy of the axis trajectory they monitor.

[0004] Currently, the sensor probe surface is installed tangent to the outer circle of the rotor. Due to the assembly error inside each sensor, the coaxial installation is physically guaranteed, but the electrical signal from the sensor is still not coaxial, resulting in a certain error, which is not conducive to the high-speed rotation of the rotor. Utility Model Content

[0005] In order to solve the above-mentioned problems, the present application provides a magnetic bearing radial sensor assembly, a positioning device and a magnetic bearing motor.

[0006] In a first aspect, the present application provides a magnetic bearing radial sensor assembly, which adopts the following technical solution:

[0007] A magnetic bearing radial sensor assembly, comprising:

[0008] A mounting seat, wherein the mounting seat is provided with a mounting hole for the rotor to pass through; and

[0009] A sensor is mounted on the mounting seat, and the probe of the sensor faces the mounting hole to monitor the radial displacement of the rotor; wherein,

[0010] The mounting seat and the sensor are threadedly matched, and when the sensor rotates relative to the mounting seat, the probe surface of the sensor can move in a direction close to or away from the mounting hole.

[0011] Preferably, a limiting structure is provided between the mounting seat and the sensor, and the limiting structure is located on a moving path of the sensor so as to limit the distance between the probe surface of the sensor and the rotor.

[0012] Preferably, the mounting seat is provided with a plurality of the sensors, and the limiting structure is provided between at least one of the sensors and the mounting seat;

[0013] And / or, the limiting structure includes a first limiting portion located on the mounting seat, and a second limiting portion cooperating with the first limiting portion is arranged on the sensor, and when the sensor moves toward the mounting hole side, the first limiting portion can abut against the second limiting portion.

[0014] Preferably, the probe surface of the sensor is located outside the mounting hole.

[0015] Preferably, a locking member is provided between the sensor and the mounting seat to lock the sensor on the mounting seat.

[0016] Preferably, the locking member comprises a locking nut, and the locking nut is threadably matched with the sensor, and when the locking nut is rotated relative to the sensor, the locking nut can abut against the mounting seat.

[0017] Preferably, a threaded hole is provided on the mounting seat, the threaded hole is communicated with the mounting hole, and the sensor is screwedly mounted in the threaded hole;

[0018] The spiral axis of the locking nut is parallel to / coincides with the spiral axis of the sensor. When the locking nut and the sensor rotate in the same direction, the sensor and the locking nut move in the same direction.

[0019] In a second aspect, the present application provides a magnetic bearing radial sensor positioning device, which adopts the following technical solution:

[0020] A magnetic bearing radial sensor positioning device includes a magnetic bearing radial sensor assembly as described in the above technical solution, and also includes a positioning tool, the positioning tool is detachably connected to the mounting seat, the positioning tool includes a boss and an annular groove, the mounting seat is located in the annular groove, the boss is gap-matched with the mounting hole, and the side of the mounting seat facing away from the mounting hole is in contact with the side wall of the annular groove.

[0021] Preferably, a disassembly hole is provided on the mounting seat, and the disassembly hole opens toward one end of the positioning tool and is opposite to the positioning tool.

[0022] In a third aspect, the present application provides a magnetic levitation motor, which adopts the following technical solution:

[0023] A magnetic levitation motor comprises a magnetic levitation bearing radial sensor assembly as described in the above technical solution.

[0024] The utility model has the following advantages and beneficial effects:

[0025] After the physical position of the sensor is installed, when calibrating the sensor, the position of the sensor can be adjusted by monitoring the electrical signal from the sensor to ensure that the electrical signals received by the controller are coaxial; when adjusting the position of the sensor, the position of the sensor can be adjusted by rotating the sensor.

[0026] Since the sensor and the mounting seat are installed by thread, the sensor can be adjusted with good adjustment accuracy, and the physical position of the sensor can be finely adjusted, which makes it easier to adjust the detection values ​​of each sensor to match, thereby achieving coaxial installation of each sensor at the electrical signal detection level, and avoiding the situation where the sensor is coaxially installed at the physical level but the electrical signal detection level is not coaxial. When controlling the rotor to be coaxial, the control accuracy is higher, which is conducive to the rotor rotating at a higher speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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 work.

[0028] Figure 1 It is a schematic diagram of the structure of the magnetic bearing according to the embodiment of the present application.

[0029] Figure 2 It is a top view of the magnetic bearing according to an embodiment of the present application.

[0030] Figure 3 It is a cross-sectional view of the magnetic bearing according to an embodiment of the present application.

[0031] Figure 4 It is a structural schematic diagram of the positioning tooling according to an embodiment of the present application.

[0032] Figure 5 It is a schematic diagram of the structure of the mounting seat and the positioning tooling when the embodiment of the present application cooperates.

[0033] Figure 6 It is a cross-sectional view of the mounting seat and the positioning tooling of the embodiment of the present application when they are matched.

[0034] The markings in the figure are:

[0035] 100, mounting seat; 110, mounting hole; 120, threaded hole; 130, first limiting portion; 140, disassembly hole; 200, sensor; 210, locking nut; 220, second limiting portion; 300, positioning tool; 310, boss; 320, annular groove. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0037] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0038] The magnetic levitation motor uses sensors to monitor the position of the rotor, and then transmits the monitored position signal to the magnetic bearing controller. The magnetic bearing controller controls the magnetic bearing according to the monitoring signal of the sensor to ensure the stable suspension of the rotor. The sensor assembly of the magnetic levitation bearing includes a mounting base and multiple sensors. The mounting base is used to install and fix the sensor. Since the controller uses the monitoring data of the sensor to control the magnetic levitation bearing, the installation requirements of the sensor are very high. During installation, it is necessary to install all four sensors concentrically as much as possible.

[0039] Generally, the sensor probe surface is installed tangent to the inner circle of the mounting base. Due to the assembly error inside each sensor, the coaxial installation is physically guaranteed, but the electrical signal from the sensor is still not coaxial, and the controller receives the electrical signal from the sensor, which will cause certain troubles in control. It is necessary to compensate for the electrical signals of different axes during subsequent control to make up for the problem of the electrical signals from the sensor not being coaxial. After each magnetic bearing is manufactured, it has different compensation data, which will bring many inconveniences to the subsequent use of the magnetic bearing.

[0040] In order to solve the above problems, the present application provides a magnetic bearing radial sensor assembly, which can adjust the relative position between the sensor 200 and the mounting seat 100 when the sensor 200 is subsequently zeroed by threading the sensor 200, thereby ensuring that the sensor 200 is coaxial at the electrical signal detection level. Moreover, by adopting the solution that the sensor 200 is coaxial at the electrical signal detection level, the present application does not need to force the sensor 200 and the mounting seat 100 to be physically coaxial, thereby reducing the difficulty of installing the sensor 200 and improving the accuracy of the sensor 200 after installation. Among them, since the relative position of the sensor 200 and the mounting seat 100 is adjusted mainly by the operator's hand movements, the operation accuracy is low when the position of the sensor 200 is manually adjusted, and operation errors are prone to occur. The sensor 200 is threadedly matched with the mounting base 100. When the operator rotates the sensor 200, the rotation amplitude of the sensor 200 is much larger than the distance the sensor 200 moves toward the mounting hole 110. That is, the sensor 200 rotates at a larger angle to push the sensor 200 to move a smaller distance toward the mounting hole 110. This can reduce the error caused by hand error when adjusting the position of the sensor 200, thereby improving the adjustment accuracy of the sensor 200 and making it easier to adjust the sensor 200 to be coaxial at the electrical signal detection level.

[0041] The following is combined with Figures 1 to 6 , a magnetic levitation bearing radial sensor assembly, a positioning device and a magnetic levitation motor provided in an embodiment of the present application are described in detail through specific embodiments and their application scenarios.

[0042] A first aspect of this embodiment provides a detailed description of a magnetic bearing radial sensor assembly.

[0043] Reference Figure 1 , Figure 2 A magnetic bearing radial sensor assembly includes a mounting seat 100 and a sensor 200. The mounting seat 100 has a mounting hole 110. The sensor 200 is mounted on the mounting seat 100, and the probe surface of the sensor 200 faces the mounting hole 110. Through the probe surface of the sensor 200, the offset of the rotor in the mounting hole 110 can be monitored, so as to control the position of the rotor and ensure that the rotor and the mounting hole 110 remain concentric. It can be understood that in order to monitor the offset of the rotor in the mounting hole 110, the preferred solution is to distribute multiple sensors 200 around the mounting hole 110, so that the offset of the rotor in multiple directions can be monitored. In one embodiment, four sensors 200 are provided, and the four sensors 200 are evenly distributed around the mounting hole 110. In one embodiment, the sensor 200 is an eddy current sensor 200, and the eddy current sensor 200 is a cylindrical structure, which is convenient for the sensor 200 to be threaded with the mounting seat 100.

[0044] The mounting base 100 and the sensor 200 are threadedly matched, and when the sensor 200 rotates relative to the mounting base 100, the probe surface of the sensor 200 can move in a direction close to or away from the mounting hole 110. In order to zero the sensor 200, it is necessary to adjust the distance between the probe surface of the sensor 200 and the rotor in the mounting hole 110. By mounting the sensor 200 on the mounting base 100 in a threaded manner, the distance between the probe surface of the sensor 200 and the mounting hole 110 can be conveniently adjusted.

[0045] According to an alternative embodiment, referring to Figure 2 , Figure 3 A limiting structure is provided between the mounting base 100 and the sensor 200. The limiting structure is located on the path of movement of the sensor 200 to limit the distance between the probe surface of the sensor 200 and the rotor. When adjusting the relative position between the sensor 200 and the mounting base 100, the probe surface of the sensor 200 may protrude into the mounting hole 110. When the rotor is mounted in the mounting hole 110, the rotor may contact the probe surface of the sensor 200, thereby damaging the sensor 200 and the rotor. The limiting structure can avoid this situation. The limiting structure can limit the distance between the probe surface of the sensor 200 and the mounting hole 110, thereby controlling the distance between the probe surface of the sensor 200 and the rotor. At the same time, due to the existence of the limiting structure, the sensor 200 can be positioned more quickly when the sensor 200 is installed.

[0046] According to an alternative embodiment, referring to Figure 2 , Figure 3The mounting seat 100 is provided with a plurality of sensors 200, and a limiting structure is provided between at least one sensor 200 and the mounting seat 100. By providing a plurality of sensors 200, the offset of the rotor can be monitored from multiple directions, and a limiting structure is provided between at least one sensor 200 and the mounting seat 100, which means that only some of the sensors 200 among the plurality of sensors 200 are provided with a limiting structure between the mounting seat 100, or all of the sensors 200 are provided with a limiting structure between the mounting seat 100. When there is a limiting structure between only some sensors 200 and the mounting base 100, when installing the sensor 200, first install the sensor 200 with the limiting structure. After the sensor 200 with the limiting structure is installed in place, connect the installed sensor 200 and the uninstalled sensor 200 to the controller at the same time, and then install the uninstalled sensor 200 on the mounting base 100, and adjust the relative position between the sensor 200 and the mounting base 100 according to the output value of the installed sensor 200, until the output value of the later installed sensor 200 is consistent with the output value of the first installed sensor 200, the installation of the sensor 200 is completed, and at this time, the signals output by all sensors 200 are coaxial.

[0047] When a limiting structure is provided between all sensors 200 and the mounting base 100, all sensors 200 are directly installed in place. At this time, all sensors 200 are limited by the limiting structure. Subsequently, all installed sensors 200 are connected to the controller, and the output value of a sensor 200 whose probe surface is the largest from the center value of the mounting hole 110 is selected as a reference. The relative positions of the remaining sensors 200 and the mounting base 100 are adjusted (the sensors 200 are adjusted away from the mounting hole 110) until the output values ​​of all sensors 200 are the same and the signals output by all sensors 200 are coaxial.

[0048] According to an alternative embodiment, referring to Figure 2 , Figure 3 The limiting structure includes a first limiting portion 130 located on the mounting seat 100, and a second limiting portion 220 is provided on the sensor 200 to cooperate with the first limiting portion 130. When the sensor 200 moves toward the mounting hole 110, the first limiting portion 130 can abut against the second limiting portion 220. Through the cooperation of the first limiting portion 130 and the second limiting portion 220, the relative position of the mounting seat 100 and the sensor 200 is limited, so that the probe surface of the sensor 200 does not protrude into the mounting hole 110.

[0049] According to an alternative embodiment, referring to Figure 2 , Figure 3, the probe surface of the sensor 200 is located outside the mounting hole 110. Usually, when installing the sensor 200, a shaft is first installed in the mounting hole 110, and the diameter of the shaft is the same as the inner diameter of the mounting hole 110, that is, the shaft is interference fit in the mounting hole 110, and then the probe surfaces of multiple sensors 200 are made to contact the shaft, and the sensors 200 are all fixed on the mounting seat 100. At this time, it can be ensured that the distances of multiple sensors 200 relative to the center of the mounting hole 110 are the same, that is, multiple sensors 200 are physically concentric. However, when the shaft is disassembled, friction will be generated between the probe surface of the sensor 200 and the shaft, which may cause damage to the sensor 200, thereby affecting the subsequent monitoring results. In addition, only ensuring physical concentricity without ensuring the concentricity of the electrical signal output by the sensor 200 is not conducive to subsequent control. This solution can avoid this situation by preventing the probe surface of the sensor 200 from protruding into the mounting hole 110 . It can also avoid contact between the rotor and the probe surface of the sensor 200 during subsequent use, thereby ensuring that the sensor 200 works in a relatively safe environment.

[0050] According to an optional embodiment, a locking member is provided between the sensor 200 and the mounting base 100 to lock the sensor 200 on the mounting base 100. That is, the sensor 200 and the mounting base 100 can be locked by the locking member to prevent the distance between the probe surface of the sensor 200 and the mounting hole 110 from changing when the sensor 200 directly rotates relative to the mounting base 100 during operation, thereby ensuring the accuracy of the sensor 200 during operation.

[0051] According to an alternative embodiment, referring to Figure 2 , Figure 3 The locking member includes a locking nut 210, which is threadedly matched with the sensor 200. When the locking nut 210 rotates relative to the sensor 200, the locking nut 210 can abut against the mounting seat 100 and generate a pre-tightening force. When the sensor 200 is installed in place, since the locking nut 210 is threadedly connected to the sensor 200, when the locking nut 210 is rotated to abut against the mounting seat 100, a pre-tightening force will be applied to the sensor 200, and the sensor 200 itself is threadedly connected to the mounting seat 100, so the sensor 200 and the mounting seat 100 can be locked by the pre-tightening force, which can effectively prevent the sensor 200 from loosening during use.

[0052] According to an optional embodiment, the mounting seat 100 is provided with a threaded hole 120, the threaded hole 120 is connected with the mounting hole 110, and the sensor 200 is screwed in the threaded hole 120; the screw axis of the locking nut 210 is parallel to the screw axis of the sensor 200, and when the locking nut 210 and the sensor 200 rotate in the same direction, the sensor 200 and the locking nut 210 move in the same direction. When the sensor 200 is mounted on the mounting seat 100, when the sensor 200 is rotated, the probe surface of the sensor 200 will move relative to the mounting hole 110 under the action of the thread, and when the locking nut 210 is rotated, the locking nut 210 will move relative to the sensor 200 under the action of the thread. The parallelism or coincidence of the screw axis of the locking nut 210 and the screw axis of the sensor 200 means that the screw center line of the screw thread on the locking nut 210 and the screw center line of the screw thread that matches the sensor 200 and the mounting seat 100 are parallel to or coincide with each other.

[0053] When the locking nut 210 and the sensor 200 rotate in the same direction, the sensor 200 and the locking nut 210 move in the same direction, which means that when the sensor 200 is rotated, the direction in which the sensor 200 moves relative to the mounting hole 110 is the same as when the locking nut 210 is rotated in the same rotation direction, the locking nut 210 moves relative to the sensor 200. Specifically, Figure 3 As shown, if the sensor 200 is rotated in the clockwise direction, the probe surface of the sensor 200 (i.e., the end surface of the sensor 200 facing the mounting hole 110) moves toward the mounting hole 110, then when the locking nut 210 is rotated in the clockwise direction, the locking nut 210 will move toward the mounting hole 110. When the locking nut 210 abuts against the mounting base 100, the sensor 200 will be locked on the mounting base 100.

[0054] According to an alternative embodiment, referring to Figure 3 The first limiting portion 130 includes an annular structure located in the threaded hole 120 and close to the mounting hole 110, and the annular structure protrudes from the inner wall of the threaded hole 120, and the second limiting portion 220 includes a step surface arranged on the outer periphery of the sensor 200. When the sensor 200 is rotated, the step surface can abut against the annular structure, so that the sensor 200 cannot continue to move in the threaded hole 120, thereby limiting the position of the sensor 200.

[0055] A second aspect of this embodiment provides a detailed description of a magnetic bearing radial sensor positioning device.

[0056] Reference Figure 4 , Figure 5A magnetic bearing radial sensor positioning device includes a magnetic bearing radial sensor assembly in the above embodiment, and also includes a positioning tool 300, the positioning tool 300 is detachably connected to the mounting seat 100, the positioning tool 300 includes a boss 310 and an annular groove 320, the mounting seat 100 is located in the annular groove 320, the boss 310 and the mounting hole 110 are in clearance, and the side of the mounting seat 100 away from the mounting hole 110 is in contact with the side wall of the annular groove 320. Figure 4 As shown, the annular groove 320 is arranged around the boss 310, the boss 310 is a cylindrical structure, and the shape of the annular groove 320 matches the shape of the mounting seat 100. When the mounting seat 100 is located in the annular groove 320, the outer wall of the mounting seat 100 fits with the side wall of the annular groove 320, that is, the mounting seat 100 is installed in the annular groove 320 with interference or small clearance.

[0057] According to an alternative embodiment, referring to Figure 5 , Figure 6 , a disassembly hole 140 is provided on the mounting seat 100, and the disassembly hole 140 opens toward one end of the positioning fixture 300 and is opposite to the positioning fixture 300. Since the mounting seat 100 and the positioning fixture 300 have an interference fit or a small clearance fit, it is inconvenient to disassemble the mounting seat 100 from the positioning fixture 300. However, by inserting a tool into the disassembly hole 140 provided on the mounting seat 100, the mounting seat 100 and the positioning fixture 300 can be disassembled. In one embodiment, the disassembly hole 140 is a threaded hole 120. When a bolt is screwed into the disassembly hole 140, the end of the bolt will abut against the positioning tool, and as the bolt rotates, the mounting seat 100 and the positioning fixture 300 will be gradually separated.

[0058] A third aspect of this embodiment provides a detailed description of a magnetic levitation motor.

[0059] A magnetic suspension motor includes a magnetic suspension bearing radial sensor assembly in the above embodiment. Specifically, a magnetic suspension bearing is installed on the rotor of the magnetic suspension motor, and the magnetic suspension bearing radial sensor assembly is used to monitor the concentricity of the rotor and the magnetic suspension bearing.

[0060] The above description is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention.

Claims

1. A magnetic bearing radial sensor assembly, characterized in that: include: A mounting seat (100), wherein the mounting seat (100) is provided with a mounting hole (110) for the rotor to pass through; as well as A sensor (200), wherein the sensor (200) is mounted on the mounting seat (100), and the probe surface of the sensor (200) faces the mounting hole (110) to monitor the radial displacement of the rotor; wherein: The mounting seat (100) and the sensor (200) are threadedly matched, and when the sensor (200) rotates relative to the mounting seat (100), the probe surface of the sensor (200) can move in a direction approaching or moving away from the mounting hole (110).

2. A magnetic bearing radial sensor assembly according to claim 1, characterized in that: A limiting structure is provided between the mounting seat (100) and the sensor (200), and the limiting structure is located on a moving path of the sensor (200) so as to limit the distance between the probe surface of the sensor (200) and the rotor.

3. A magnetic bearing radial sensor assembly according to claim 2, characterized in that: The mounting seat (100) is provided with a plurality of the sensors (200), and the limiting structure is provided between at least one of the sensors (200) and the mounting seat (100); And / or, the limiting structure includes a first limiting portion (130) located on the mounting seat (100), and a second limiting portion (220) is provided on the sensor (200) to cooperate with the first limiting portion (130), and when the sensor (200) moves toward the mounting hole (110), the first limiting portion (130) can abut against the second limiting portion (220).

4. A magnetic bearing radial sensor assembly according to any one of claims 1 to 3, characterized in that: The probe surface of the sensor (200) is located outside the mounting hole (110).

5. A magnetic bearing radial sensor assembly according to any one of claims 1 to 3, characterized in that: A locking member is provided between the sensor (200) and the mounting seat (100) so as to lock the sensor (200) on the mounting seat (100).

6. A magnetic bearing radial sensor assembly according to claim 5, characterized in that: The locking member comprises a locking nut (210) which is threadably matched with the sensor (200). When the locking nut (210) rotates relative to the sensor (200), the locking nut (210) can abut against the mounting seat (100).

7. A magnetic bearing radial sensor assembly according to claim 6, characterized in that: The mounting seat (100) is provided with a threaded hole (120), the threaded hole (120) is in communication with the mounting hole (110), and the sensor (200) is screw-mounted in the threaded hole (120); The spiral axis of the locking nut (210) is parallel to / coincides with the spiral axis of the sensor (200), and when the locking nut (210) and the sensor (200) rotate in the same direction, the sensor (200) and the locking nut (210) move in the same direction.

8. A magnetic bearing radial sensor positioning device, characterized in that: A magnetic bearing radial sensor assembly comprising any one of claims 1 to 7, further comprising a positioning fixture (300), wherein the positioning fixture (300) is detachably connected to the mounting seat (100), wherein the positioning fixture (300) comprises a boss (310) and an annular groove (320), wherein the mounting seat (100) is located in the annular groove (320), wherein the boss (310) is loosely matched with the mounting hole (110), and wherein the side of the mounting seat (100) facing away from the mounting hole (110) is in contact with the side wall of the annular groove (320).

9. A magnetic bearing radial sensor positioning device according to claim 8, characterized in that: The mounting seat (100) is provided with a disassembly hole (140), and the disassembly hole (140) opens toward one end of the positioning tool (300) and is opposite to the positioning tool (300).

10. A magnetic levitation motor, characterized in that: A magnetic bearing radial sensor assembly comprising any one of claims 1-7.

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