A test device and test system for magnetic suspension bearing

Abstract

The invention relates to a test device and a test system for magnetic suspension bearings applied in the field of bearing detection, comprising a test bench with a built-in power supply, an electric slide rail being arranged on the top of the test bench, a vertical plate being installed on the top of one end of the test bench, a through hole being arranged at the center of the vertical plate, a plurality of distance measuring sensors arranged around the through hole being installed on one side surface of the vertical plate, a bearing to be tested placed on the top surface of a bottom plate being arranged between two clamping plates, a rotor being installed through the inner center of the bearing to be tested, and a plurality of plug-in slots being arranged on one end surface of the rotor; a moving seat being slidably connected inside the electric slide rail, a driving motor being installed on the top of the moving seat, a connecting unit being installed on the output end of the driving motor, and a plug-in component, a movable component and a second rack being matched, and plug-in processing of plug-in slots on the surfaces of rotors with different diameters can be applied by virtue of the different swing amplitudes of the plug-in component and the lengths of a micro electric extension rod, thereby realizing convenient and efficient connection processing.

Description

Technical Field

[0001] The invention relates to a test device for a magnetic suspension bearing, in particular to a test device and a test system for a magnetic suspension bearing applied in the field of bearing detection. Background Art

[0002] Magnetic bearings are a type of bearing technology that uses magnetic force to achieve contactless suspension between the rotor and stator. They have the advantages of no mechanical contact, low energy consumption, and low noise, and are widely used in industries such as industry, aerospace, and medical equipment. However, their complex control systems and high costs require experimental testing during the R&D and production process to verify that their performance parameters meet the requirements.

[0003] The specification of Chinese patent CN218766006U discloses a static test system and test bench for magnetic suspension bearings, which can test and verify the designed bearings and structures before the magnetic suspension bearings are assembled as a whole. The specification of Chinese patent CN214251530U discloses a magnetic suspension bearing test device and test system, which can simulate the assembly relationship between the rotating shaft and the magnetic suspension bearing in dynamic or static state, so as to test the static and dynamic performances of the magnetic suspension bearings, achieve the purpose of comprehensive testing, and ensure the safety of subsequent use.

[0004] Existing magnetic bearing test devices all use flanges or other fixed connection methods to connect the rotor of the magnetic bearing to the drive structure, which is usually limited by size. When performing corresponding test operations on rotors of different diameters, it is necessary to configure corresponding connecting and driving structures, which makes the operation more cumbersome. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a connection structure that can adapt to rotors of multiple sizes when conducting magnetic bearing tests, so that the test operation is convenient and efficient.

[0006] In order to solve the above problems, the present invention provides a test device for magnetic suspension bearings, including a test bench with a built-in power supply, an electric slide rail is arranged on the top of the test bench, a vertical plate is installed on the top of one end of the test bench, a through hole is arranged at the center of the vertical plate, a plurality of distance measuring sensors arranged around the through hole are installed on one side surface of the vertical plate, two symmetrically arranged hydraulic telescopic rods are installed on the top of the test bench, a bottom plate is installed on the power end of the hydraulic telescopic rod, two symmetrically arranged clamping plates are slidably arranged on the top surface of the bottom plate, and a through strip is installed through the inside of the clamping plate;

[0007] A bearing to be tested is arranged between the two clamping plates and is placed on the top surface of the bottom plate. A rotor is installed through the inner center of the bearing to be tested, and a plurality of plug-in grooves are arranged on one end surface of the rotor.

[0008] The electric slide rail is internally slidably connected with a moving seat, a driving motor is installed on the top of the moving seat, a connecting unit is installed on the output end of the driving motor, and the connecting unit includes a transfer rod, the surface of the transfer rod is rotatably connected with movable parts with the same number as the plug-in slots, the center position of the movable part is connected with a transfer gear through an axle rod, and the surface of the movable part is connected with a plug-in part, the surface of the transfer gear is meshingly connected with a No. 2 rack, the tail end of the No. 2 rack is connected with a magnetic ring, the end of the magnetic ring facing away from the No. 2 rack is connected with an electromagnetic ring through a telescopic sleeve rod, and the inner wall of the electromagnetic ring is fixedly connected to the surface of the transfer rod through a short rod, and the through-port and the center of the transfer rod are coaxially arranged.

[0009] In the above-mentioned test device for magnetic levitation bearings, the cooperation of the connector, the movable part and the No. 2 rack can be used to connect the connectors to the connector slots on the surfaces of rotors with different diameters, depending on the swing amplitude of the connector and the length of the micro electric extension rod, thereby achieving convenient and efficient connection processing.

[0010] As a further improvement of the present application, a strip groove is provided on the top of the base plate, a bidirectional screw is installed inside the strip groove, two threaded areas of the bidirectional screw are connected to the bottom of the clamping plate through a threaded sleeve, a servo motor is installed on one side surface of the base plate, and the output end of the servo motor is connected to one end of the bidirectional screw.

[0011] As a further improvement of the present application, rotating motors are installed on surfaces of the clamping plates facing away from each other, a reset member is connected to the output end of the rotating motor, and surfaces of the two reset members facing away from each other are respectively fitted with surfaces of the two clamping plates close to each other.

[0012] As a further improvement of the present application, a pressure sensing layer is installed on the surface of one side of the penetration bar close to the bearing to be tested, and the pressure sensing layer is connected to the rotating motor signal.

[0013] As a further improvement of the present application, the connector is designed to be arc-shaped, and the connector is connected to the surface of the movable part through a micro-electric extension rod, and the micro-electric extension rod is in a retracted state in an initial state.

[0014] As another improvement of the present application, a metal thread groove is provided on the surface of the end of the connector close to the rotor, and a deformation constraint belt with a metal thread block is connected to the end surface of the connector through the metal thread groove. The deformation constraint belt is made of elastic material, and the interior of the deformation constraint belt is composed of three independent cavities. The cross-section of the centrally arranged cavity is larger than the diameter of the metal thread block, and the other two cavities are symmetrically arranged about the centrally located cavity, and an electrorheological fluid and a conductive wire are arranged in each cavity.

[0015] As a further improvement of the present application, the surface of the through-bar is covered with a rubber layer, one end of the through-bar is connected to a No. 1 rack, the top of the No. 1 rack is meshed with a driving gear, and a driving motor is installed on the back of the vertical plate, and the output end of the driving motor is connected to the driving gear.

[0016] As a further improvement of the present application, the height of the penetration bar is greater than the height of the No. 1 rack, the cross-sectional dimension of the penetration bar is greater than the cross-sectional dimension of the No. 1 rack, and the surface of the rubber layer contacts the bottom surface of the bearing to be tested.

[0017] As a further improvement of the present application, a test system for a magnetic bearing adopts a test device for a magnetic bearing, including a controller and a static detection module matched with the bearing to be tested, as well as a clamping module, a correction module and a dynamic detection module. The static detection module is connected to the ranging sensor, the controller and the built-in power supply signal, and is used to detect the state of the rotor of the bearing to be tested in a static state. The clamping module is connected to the servo motor signal and is used to clamp and constrain the bearing to be tested. The correction module is connected to the rotating motor, the pressure sensing layer and the infrared ranging sensor signal and is used to correct the offset bearing to be tested to a horizontal placement state. The dynamic detection module is connected to the electromagnetic ring, the drive motor and the ranging sensor signal and is used to detect the state of the rotor of the bearing to be tested in a rotating state.

[0018] In summary, the present application utilizes the cooperation of the connector, the movable part and the No. 2 rack. Depending on the swing amplitude of the connector and the different lengths of the micro-electric extension rod, it is suitable for the plug-in processing of the plug-in slots on the surfaces of rotors with different diameters, thereby achieving convenient and efficient connection processing. In addition, by utilizing the deformation constraint belt, for rotors without plug-in slots, multi-size connections can also be carried out more conveniently, thereby avoiding the phenomenon that different connection structures need to be configured when testing the bearings of multi-diameter rotors. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the first implementation method of the present application;

[0020] Figure 2 This is a schematic diagram of the installation of the vertical plate, the through-hole and the distance measuring sensor of the first embodiment of the present application;

[0021] Figure 3 For this application Figure 2 A is an enlarged schematic diagram;

[0022] Figure 4 This is a schematic diagram of the connection unit structure of the first embodiment of the present application;

[0023] Figure 5 This is an installation diagram of the penetration strip and the pressure sensing layer of the first embodiment of the present application;

[0024] Figure 6 This is a schematic diagram of the working state of the connector of the first embodiment of the present application;

[0025] Figure 7 This is a state diagram of the plug-in component of the first embodiment of the present application being plugged into the plug-in slot;

[0026] Figure 8 This is a process diagram of the horizontal correction of the bearing to be tested in the first embodiment of the present application;

[0027] Fig. 9 This is an installation diagram of a No. 1 rack and a driving gear of the first embodiment of the present application;

[0028] Fig.10 This is a schematic diagram of the working state of rack No. 1 in the first implementation mode of the present application;

[0029] Fig.11 This is a structural diagram of a deformation restraining belt according to a third embodiment of the present application;

[0030] Fig.12 This is a state diagram of the deformation constraint belt of the third embodiment of the present application gradually solidifying on the rotor surface.

[0031] Description of the numbers in the figure:

[0032] 1001, bearing to be tested; 1002, plug-in slot; 1, test bench; 2, electric slide rail; 3, drive motor; 4, vertical plate; 41, through-hole; 42, distance sensor; 5, through-bar; 51, rubber layer; 52, rack No. 1; 53, drive gear; 6, servo motor; 61, bidirectional screw; 7, hydraulic telescopic rod; 8, connecting unit; 81, adapter rod; 82, plug-in part; 83, movable part; 84, rack No. 2; 85, magnetic ring; 86, electromagnetic coil; 87, deformation restraint belt; 9, clamping plate; 91, rotating motor; 92, reset part; 10, pressure sensing layer. DETAILED DESCRIPTION

[0033] Three implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0034] The first implementation method:

[0035] Figure 1-4A test device for a magnetic suspension bearing is shown, comprising a test bench 1 with a built-in power supply, an electric slide rail 2 is arranged on the top of the test bench 1, a vertical plate 4 is installed on the top of one end of the test bench 1, a through hole 41 is arranged at the center of the vertical plate 4, a plurality of distance measuring sensors 42 arranged around the through hole 41 are installed on one side surface of the vertical plate 4, two symmetrically arranged hydraulic telescopic rods 7 are installed on the top of the test bench 1, a bottom plate is installed on the power end of the hydraulic telescopic rod 7, two symmetrically arranged clamping plates 9 are slidably arranged on the top surface of the bottom plate, and a through strip 5 is installed through the inside of the clamping plate 9;

[0036] A bearing 1001 to be tested is arranged between the two clamping plates 9 and is placed on the top surface of the bottom plate. A rotor is installed through the inner center of the bearing 1001 to be tested, and a plurality of insertion grooves 1002 are provided on one end surface of the rotor.

[0037] The electric slide rail 2 is internally slidably connected with a moving seat, a driving motor 3 is installed on the top of the moving seat, a connecting unit 8 is installed on the output end of the driving motor 3, and the connecting unit 8 includes a transfer rod 81, and the surface of the transfer rod 81 is rotatably connected with movable parts 83 of the same number as the plug-in slots 1002, the center position of the movable part 83 is connected with a transfer gear through an axle rod, and the surface of the movable part 83 is connected with a plug-in part 82, the surface of the transfer gear is meshingly connected with a No. 2 rack 84, the tail end of the No. 2 rack 84 is connected with a magnetic ring 85, and the end of the magnetic ring 85 facing away from the No. 2 rack 84 is connected with an electromagnetic ring 86 through a telescopic sleeve rod, and the inner wall of the electromagnetic ring 86 is fixedly connected to the surface of the transfer rod 81 through a short rod, and the through-hole 41 and the center of the transfer rod 81 are coaxially arranged.

[0038] Specifically, when performing static detection processing, the bearing to be tested 1001 is clamped and constrained by the clamping plate 9, and the reset member 92 and the pressure sensing layer 10 are used to assist in confirming that the bearing to be tested 1001 in the clamped state is in a horizontal position, and the tail end of the rotor passes through the through hole 41 in the vertical plate 4. Then, the bearing to be tested 1001 is energized, and a plurality of distance measuring sensors 42 are used to detect the displacement state of the rotor.

[0039] When performing dynamic detection processing, it is necessary to perform it on the basis of static detection processing (that is, the bearing 1001 to be tested is in a horizontal clamping state at this time). At this time, the electric slide rail 2 is used to drive the moving seat to approach the bearing 1001 to be tested, and then the electromagnetic ring 86 is started to generate a force of mutual repulsion with the magnetic ring 85, so that the magnetic ring 85 moves away from the electromagnetic ring 86, and drives the second rack 84 to move, indirectly driving the transfer gear to rotate, and then driving the movable part 83 connected to it through the shaft rod to rotate, so that the connector 82 is close to the plug-in slot 1002, until the connector 82 is plugged into the plug-in slot 1002, forming an indirect connection between the rotor and the output end of the drive motor 3 (such as Figure 6-7 as shown).

[0040] Since the rotor and the output end of the driving motor 3 are plug-in connected, when connected, by adjusting the swing amplitude of the connector 82 and the length of the micro-electric extension rod, the plug-in slots 1002 on the rotor surfaces of different diameters can be plugged in, and after the plug-in is completed, when the adapter rod 81 rotates, the connector 82 follows the rotation and drives the rotor to rotate synchronously. At this time, the distance measuring sensor 42 can be used to perform dynamic detection processing on the bearing 1001 to be tested.

[0041] Afterwards, the electromagnetic coil 86 is activated, generating a force of attraction with the magnetic ring 85 , which can drive the magnetic ring 85 and the second rack 84 to move in the opposite direction, and drive the connector 82 to leave the interior of the connector slot 1002 .

[0042] A strip groove is provided on the top of the base plate, and a bidirectional screw 61 is installed inside the strip groove. The two threaded areas of the bidirectional screw 61 are connected to the bottom of the clamping plate 9 through a threaded sleeve. A servo motor 6 is installed on one side surface of the base plate, and the output end of the servo motor 6 is connected to one end of the bidirectional screw 61.

[0043] Specifically, starting the servo motor 6 can drive the bidirectional screw 61 to rotate, drive the threaded sleeve on the surface to move closer, and then drive the clamping plates 9 to move closer to each other, clamping the inner bearing 1001 to be tested. Reverse rotation can drive the clamping plates 9 to move away from each other and release the clamping.

[0044] A rotating motor 91 is installed on the surfaces of the clamping plates 9 that are away from each other. A reset member 92 is connected to the output end of the rotating motor 91, and the surfaces of the two reset members 92 that are away from each other are respectively in contact with the surfaces of the two clamping plates 9 that are close to each other.

[0045] Figure 5 As shown, a pressure sensing layer 10 is installed on the surface of one side of the penetration bar 5 close to the bearing 1001 to be tested, and the pressure sensing layer 10 is connected to the rotating motor 91 for signal.

[0046] Specifically, the pressure sensing layer 10 is composed of a plurality of pressure sensors located on the same horizontal line, and is used to monitor whether the bearing 1001 to be tested, which is placed on the surface of the penetration strip 5, is placed horizontally. If the bearing 1001 to be tested is placed horizontally, the pressure values ​​of the plurality of pressure sensors on the surface of the pressure sensing layer 10 should be the same (due to the different diameters of the bearing 1001 to be tested, the number of pressure sensors in contact with the bearing 1001 to be tested and the pressure sensing layer 10 is also different, but the number of contact is not less than 2). If the pressure values ​​of the plurality of pressure sensors are different, it indicates that the bearing 1001 to be tested is not horizontally constrained at this time. At this time, it is necessary to start the rotating motor 91 (the corresponding position of the started rotating motor 91 is the rotating motor 91 on the side of the surface of the pressure sensing layer 10 where the force is weaker), drive the reset member 92 to swing, and with the help of the swing of the reset member 92, the bearing 1001 to be tested in the offset clamping placement state can be restored to a horizontal state (such as Figure 8 as shown).

[0047] In addition, after the horizontal correction, the rotating motor 91 is used to drive the reset member 92 to exert the same swinging effect on the bearing to be measured 1001, which can play a corresponding auxiliary restraining effect on the bearing to be measured 1001.

[0048] The connector 82 is designed to be arc-shaped, and the connector 82 is connected to the surface of the movable part 83 through a micro-electric extension rod, and the micro-electric extension rod is in a retracted state in an initial state.

[0049] Specifically, if the cross-sectional width of the insertion slot 1002 is greater than the cross-sectional width of the plug-in element 82, and if the bearing 1001 to be tested is not placed horizontally, even if the plug-in element 82 is successfully plugged into the insertion slot 1002,

[0050] Fig. 9 It is shown that the surface of the through-bar 5 is covered with a rubber layer 51, one end of the through-bar 5 is connected to a No. 1 rack 52, the top of the No. 1 rack 52 is meshed and connected to a driving gear 53, and a driving motor is installed on the back of the vertical plate 4, and the output end of the driving motor is connected to the driving gear 53.

[0051] The height of the penetration bar 5 is greater than that of the first rack 52 , and the cross-sectional dimension of the penetration bar 5 is greater than that of the first rack 52 , and the surface of the rubber layer 51 contacts the bottom surface of the bearing 1001 to be tested.

[0052] Specifically, since the positions of the insertion groove 1002 and the plug-in component 82 on the rotor surface are not necessarily in the same straight line at the beginning, there may be an angle, which causes the subsequent plug-in component 82 to be unable to be smoothly plugged into the insertion groove 1002. At this time, the clamping plate 9 can first be used to horizontally clamp the bearing 1001 to be tested, and then the drive motor is started to rotate forward or reverse (not shown in the figure) to drive the drive gear 53 to rotate, thereby driving the rubber layer 51 to move accordingly, and with the help of the friction contact between the rubber layer 51 and the bearing 1001 to be tested, a small rotation is performed to adjust the position of the insertion groove 1002 until it is aligned with the plug-in component 82 (because the bearing 1001 to be tested is in a horizontal clamping state at this time, with the movement of the rubber layer 51, the bearing 1001 to be tested cannot move in the horizontal direction, and then a small circumferential movement is performed, such as Fig.10 as shown).

[0053] The second implementation method:

[0054] A test system for a magnetic suspension bearing adopts a test device for a magnetic suspension bearing, including a controller and a static detection module, a clamping module, a correction module and a dynamic detection module matched with a bearing 1001 to be tested, wherein the static detection module is connected to a distance sensor 42, a controller and a built-in power supply signal, and is used to detect the state of a rotor of the bearing 1001 to be tested in a static state, the clamping module is connected to a servo motor 6 signal, and is used to clamp and constrain the bearing 1001 to be tested, the correction module is connected to a rotating motor 91, a pressure sensing layer 10 and an infrared distance sensor signal, and is used to correct the offset bearing 1001 to be tested to a horizontal state, and the dynamic detection module is connected to an electromagnetic ring 86, a driving motor 3 and a distance sensor 42 signal, and is used to detect the state of the rotor of the bearing 1001 to be tested in a rotating state.

[0055] Specifically, in this embodiment, the coil in the bearing 1001 to be tested is connected to the controller signal, and the controller is connected to the built-in power supply signal. The controller can be used to realize the electrical connection between the bearing 1001 to be tested and the built-in power supply, so that when the bearing 1001 to be tested is in the static detection module for static detection processing, it can be powered on to check whether the displacement state of the rotor of the bearing 1001 to be tested meets the requirements, and the clamping module and the correction module are used to assist the static detection module and the dynamic detection module to realize horizontal constraint clamping of the bearing 1001 to be tested, so as to avoid test detection errors caused by offset placement, thereby ensuring detection accuracy.

[0056] The third implementation method:

[0057] Fig.11It is shown that a metal thread groove is provided on the surface of the end of the connector 82 close to the rotor, and a deformation constraint belt 87 with a metal thread block is connected to the end surface of the connector 82 through the metal thread groove. The deformation constraint belt 87 is made of elastic material, and the interior of the deformation constraint belt 87 is composed of three independent cavities. The cross-section of the centrally arranged cavity is larger than the diameter of the metal thread block, and the other two cavities are symmetrically arranged about the centrally arranged cavity, and an electrorheological fluid and a conductive wire are arranged in each cavity.

[0058] Different from the first embodiment, this embodiment is mainly aimed at the case where the rotor surface is not provided with a plug-in groove 1002, and the friction contact stability of the connector 82 against the rotor surface is insufficient, and then during the subsequent rotation, it cannot stably drive the rotor to rotate. In this embodiment, a rubber block (not shown in the figure) is installed at the bottom of the centrally arranged cavity, which is used to prevent the deformation constraint belt 87 parts corresponding to the cavities on both sides from fitting together in the unpowered state, so that there is a gap between the deformation constraint belts 87 on both sides in the unpowered state, so that when the connector 82 abuts against the rotor surface, the deformation constraint belt 87 parts on both sides can overlap the surface of the rotor respectively.

[0059] Specifically, when there is no plug-in groove 1002 on the rotor surface, it is necessary to first determine that the rotor and the transfer rod 81 are coaxially arranged, and then with the help of the movement of the connector 82 and the No. 2 rack 84, the deformation constraint belt 87 is driven to bridge the surface of the rotor. Taking the example of the number of connectors 82 in this application being 4, the top connector 82 is marked as position one, and then the remaining connectors 82 are marked as positions two, three and four in a clockwise direction. The deformation constraint belt 87 at position one is first energized (because at this time the two deformation constraint belts 87 at position one are both in contact with the rotor surface), and then rotated 90 degrees, with the No. 4 position at the top. The deformation constraint belt 87 in contact with the rotor surface is energized again by using the extension effect of the liquid, and then the above operation is repeated until all four deformation constraint belts 87 are energized (such as Fig.12 As shown), the connector 82 and the deformation constraint belt 87 are stably connected to the rotor surface (because the deformation constraint belt 87 is made of elastic material, rubber material or other elastic material can be selected to increase the effective contact area after curing), which can achieve a better driving rotation effect.

[0060] In summary, the present application utilizes the cooperation of the connector 82, the movable part 83 and the second rack 84. Depending on the swing amplitude of the connector 82 and the different lengths of the micro-electric extension rod, it is suitable for the plug-in processing of the plug-in grooves 1002 on the surfaces of rotors with different diameters, thereby achieving convenient and efficient connection processing. In addition, by utilizing the deformation constraint belt 87, for rotors without plug-in grooves 1002, multi-size connections can also be carried out more conveniently, thereby avoiding the phenomenon that different connection structures need to be configured when testing the bearings 1001 of rotors with multiple diameters.

[0061] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A test device for a magnetic bearing, comprising a test bench (1) with a built-in power supply, wherein the top of the test bench (1) is provided with an electric slide rail (2), characterized in that: A vertical plate (4) is installed on the top of one end of the test bench (1), a through hole (41) is provided at the center of the vertical plate (4), a plurality of distance measuring sensors (42) arranged around the through hole (41) are installed on the surface of one side of the vertical plate (4), two symmetrically arranged hydraulic telescopic rods (7) are installed on the top of the test bench (1), a bottom plate is installed on the power end of the hydraulic telescopic rods (7), two symmetrically arranged clamping plates (9) are slidably arranged on the top surface of the bottom plate, and a through strip (5) is installed through the inside of the clamping plate (9); A bearing to be tested (1001) is arranged between the two clamping plates (9) and is placed on the top surface of the bottom plate. A rotor is installed through the inner center of the bearing to be tested (1001), and a plurality of insertion grooves (1002) are provided on one end surface of the rotor. The electric slide rail (2) is internally slidably connected to a moving seat, a driving motor (3) is mounted on the top of the moving seat, a connecting unit (8) is mounted on the output end of the driving motor (3), the connecting unit (8) comprises a transfer rod (81), the surface of the transfer rod (81) is rotatably connected to movable parts (83) of the same number as the plug-in slots (1002), the center position of the movable part (83) is connected to a transfer gear via a shaft, and the surface of the movable part (83) is connected to a plug-in part (82), the surface of the transfer gear is meshingly connected to a second rack (84), the tail end of the second rack (84) is connected to a magnetic ring (85), and the back of the magnetic ring (85) is connected to the magnetic ring (85). An electromagnetic ring (86) is connected to one end of the second rack (84) via a telescopic sleeve rod, and the inner wall of the electromagnetic ring (86) is fixedly connected to the surface of the transfer rod (81) via a short rod. The through hole (41) and the center of the transfer rod (81) are coaxially arranged. The electromagnetic ring (86) is started to generate a force that repel each other with the magnetic ring (85), so that the magnetic ring (85) moves away from the electromagnetic ring (86) and drives the second rack (84) to move, indirectly driving the transfer gear to rotate, and then driving the movable member (83) connected to it via the shaft rod to rotate, so that the plug-in component (82) approaches the plug-in slot (1002) until the plug-in component (82) is plugged into the plug-in slot (1002).

2. A test device for magnetic bearings according to claim 1, characterized in that: A strip groove is provided on the top of the bottom plate, a bidirectional screw (61) is installed inside the strip groove, two threaded areas of the bidirectional screw (61) are connected to the bottom of the clamping plate (9) via a threaded sleeve, a servo motor (6) is installed on one side surface of the bottom plate, and an output end of the servo motor (6) is connected to one end of the bidirectional screw (61).

3. A test device for magnetic bearings according to claim 2, characterized in that: The surfaces of the clamping plates (9) facing away from each other are mounted with a rotating motor (91), the output end of the rotating motor (91) is connected with a reset member (92), and the surfaces of the two reset members (92) facing away from each other are respectively in contact with the surfaces of the two clamping plates (9) approaching each other.

4. A test device for magnetic bearings according to claim 3, characterized in that: A pressure sensing layer (10) is installed on the surface of one side of the penetration bar (5) close to the bearing to be tested (1001), and the pressure sensing layer (10) is connected to the rotating motor (91) by signal. The plug-in component (82) is designed to be arc-shaped, and the plug-in component (82) is connected to the surface of the movable component (83) via a micro electric extension rod, and the micro electric extension rod is in a retracted state in an initial state.

5. A test device for magnetic bearings according to claim 4, characterized in that: A metal thread groove is provided on the surface of the end of the connector (82) close to the rotor, and a deformation constraint belt (87) with a metal thread block is connected to the end surface of the connector (82) through the metal thread groove, the deformation constraint belt (87) is made of elastic material, and the interior of the deformation constraint belt (87) is three independent cavities, the cross-section of the cavity arranged in the center is larger than the diameter of the metal thread block, and the other two cavities are arranged symmetrically with respect to the cavity in the center, and each cavity is arranged with an electrorheological fluid and a conductive wire.

6. A test device for magnetic bearings according to claim 5, characterized in that: The surface of the penetration bar (5) is coated with a rubber layer (51), one end of the penetration bar (5) is connected to a first rack (52), the top of the first rack (52) is meshedly connected to a driving gear (53), and a driving motor is installed on the back of the vertical plate (4), and the output end of the driving motor is connected to the driving gear (53).

7. A test device for magnetic bearings according to claim 6, characterized in that: The height of the penetration bar (5) is greater than the height of the first rack (52), the cross-sectional dimension of the penetration bar (5) is greater than the cross-sectional dimension of the first rack (52), and the surface of the rubber layer (51) contacts the bottom surface of the bearing to be tested (1001).

8. A test system for a magnetic bearing, using the test device for a magnetic bearing according to claim 7, characterized in that: The invention comprises a controller and a static detection module, a clamping module, a correction module and a dynamic detection module matched with a bearing to be tested (1001); the static detection module is connected to a distance measuring sensor (42), a controller and a built-in power supply signal, and is used to detect the state of a rotor of the bearing to be tested (1001) in a static state; the clamping module is connected to a servo motor (6) signal, and is used to clamp and constrain the bearing to be tested (1001); the correction module is connected to a rotating motor (91), a pressure sensing layer (10) and an infrared distance measuring sensor signal, and is used to correct the offset bearing to be tested (1001) to a horizontal placement state; the dynamic detection module is connected to an electromagnetic ring (86), a driving motor (3) and a distance measuring sensor (42) signal, and is used to detect the state of the rotor of the bearing to be tested (1001) in a rotating state.

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