Tool for detecting axial clearance of magnetic suspension bearing assembly and axial position of displacement sensor

Abstract

The utility model discloses a tool for detecting the axial clearance of a magnetic suspension bearing assembly and the axial position of a displacement sensor. The tool comprises two supports which are correspondingly arranged. A sliding groove is formed in the top of one support, and an adjusting assembly used for adjusting the levelness of the magnetic suspension bearing assembly is arranged in the sliding groove. The system further comprises an eddy current sensor and a magnetic suspension bearing controller. The eddy current sensor is arranged outside the bearing end of the magnetic suspension bearing assembly and axially corresponds to a rotating shaft of the magnetic suspension bearing assembly; the magnetic suspension bearing controller is electrically connected with the eddy current sensor and the magnetic suspension bearing assembly. According to the detection tool, the magnetic suspension bearing assembly can be detected before the whole machine is assembled, and the problems of low assembly efficiency and high cost caused by repeated disassembly and assembly of the whole machine and part abrasion, precision loss and the like caused by disassembly and assembly are solved.

Description

Technical Field

[0001] The utility model relates to a detection tool for the axial clearance of a magnetic levitation bearing assembly and the axial position of a displacement sensor, belonging to the technical field of magnetic levitation motor detection. Background Technique

[0002] See Figure 1 As shown, the magnetic levitation bearing assembly 4 is composed of a rotating shaft 4.1, an axial magnetic bearing assembly 4.2, a radial magnetic bearing assembly 4.3, a displacement sensor 4.4 and a protection bearing 4.5. The axial magnetic bearing assembly 4.2 and the radial magnetic bearing assembly 4.3 suspend the rotating shaft 4.1 at the central position through magnetic pulling force, and the displacement sensor 4.4 feeds back the axial and radial positions of the rotating shaft 4.1 to the magnetic levitation bearing controller in real time. The protection bearing 4.5 prevents the stator and rotor of the axial magnetic bearing from rubbing and damaging each other and the stator and rotor of the radial magnetic bearing from rubbing and damaging each other after the bearing power is cut off.

[0003] During the assembly process of the magnetic levitation bearing assembly, it is necessary to adjust the position of the protection bearing to ensure that the distance L3 between the rotating shaft and the protection bearing and the distance L4 between the limit ring and the protection bearing meet the design values; by adjusting the axial position of the displacement sensor, ensure that the distance L1 between the left edge of the sensor stator and the left edge of the sensor rotor and the distance L2 between the left and right edges of the sensor stator and the right edge of the sensor rotor meet the design values. Currently, L1, L2, L3, and L4 need to be detected after the whole machine is assembled. If there are problems, the whole machine needs to be disassembled and reworked, resulting in the following problems: 1. Low assembly efficiency and high cost; 2. Component wear and loss of accuracy during repeated disassembly and assembly processes. Content of the Utility Model

[0004] The purpose of the utility model is to provide a detection tool for the axial clearance of a magnetic levitation bearing assembly and the axial position of a displacement sensor, which can realize detection before the whole machine is assembled, and avoid problems such as low assembly efficiency, high cost, component wear and loss of accuracy caused by repeated disassembly and assembly of the whole machine.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A detection tool for the axial clearance of a magnetic levitation bearing assembly and the axial position of a displacement sensor includes two corresponding brackets; a chute is opened at the top of one of the brackets, and an adjusting component is arranged in the chute;

[0007] The adjusting component includes a screw rod vertically arranged in the chute and connected to the bracket. A nut is screwed on the screw rod, and a lifting block is arranged on the screw rod above the nut. The screw rod is inserted into the bottom of the lifting block, and both sides of the lifting block are attached to the side walls of the chute, and the bottom is abutted against the nut;

[0008] Notches for carrying the rotating shaft and bearing end of the magnetic levitation bearing assembly are respectively provided on the lifting block and another bracket; the lifting block is driven to linearly displace along the sliding groove by rotating the nut up and down to adjust the levelness of the magnetic levitation bearing assembly.

[0009] It further includes an eddy current sensor and a magnetic levitation bearing controller.

[0010] The eddy current sensor is arranged outside the bearing end of the magnetic levitation bearing assembly and is axially corresponding to the rotating shaft of the magnetic levitation bearing assembly.

[0011] The magnetic levitation bearing controller is electrically connected to the eddy current sensor and the magnetic levitation bearing assembly.

[0012] Preferably, it further includes a workbench, and both brackets and the magnetic levitation bearing controller are installed on the workbench.

[0013] Preferably, the eddy current sensor is fixedly connected to the bracket carrying the bearing end of the magnetic levitation bearing assembly through a support member, and the eddy current sensor is threadedly connected to the support member.

[0014] Preferably, longitudinal guide grooves are respectively provided on the side walls of the brackets on both sides of the sliding groove, and guide blocks inserted into the corresponding side guide grooves are formed on both sides of the lifting block.

[0015] The beneficial effects of the present utility model are as follows:

[0016] The structure of this detection tooling is simple and has high versatility. It can detect the clearance of the protective bearing and the axial position of the displacement sensor before the whole machine assembly. Just adjust according to the detection results, which can avoid problems such as low assembly efficiency, high cost, and loss of precision after part wear caused by repeated disassembly and assembly of the whole machine due to unqualified detection after installation. Description of the Drawings

[0017] Figure 1 It is a structural schematic diagram of the magnetic levitation bearing assembly;

[0018] Figure 2 It is a top view of the detection tooling;

[0019] Figure 3 It is a left view of the detection tooling (the magnetic levitation bearing controller is omitted);

[0020] Figure 4 It is a main view cross-sectional view of the detection tooling (the magnetic levitation bearing controller is omitted).

[0021] The meanings of the main reference numerals in the drawings are as follows:

[0022] 1. Workbench; 2. Bracket, 2.1. Slide groove, 2.2. Screw rod, 2.3. Nut, 2.4. Lifting block, 2.5. Notch; 3. Magnetic levitation bearing controller; 4. Magnetic levitation bearing assembly, 4.1. Rotating shaft, 4.2. Axial magnetic bearing assembly, 4.3. Radial magnetic bearing assembly, 4.4. Displacement sensor, 4.5. Protection bearing; 5. Eddy current sensor; 6. Support member. Detailed implementation manners

[0023] The following specifically introduces the present utility model in conjunction with the accompanying drawings and embodiments.

[0024] This embodiment provides a detection tool for the axial clearance of a magnetic levitation bearing assembly and the axial position of a displacement sensor. As shown in Figures 1-4 the figure, it includes a magnetic levitation bearing controller 3 installed on the workbench 1 and two corresponding brackets 2, and also includes an eddy current sensor 5. The magnetic levitation bearing assembly 4 is composed of a rotating shaft 4.1, an axial magnetic bearing assembly 4.2, a radial magnetic bearing assembly 4.3, a displacement sensor 4.4, and a protection bearing 4.5. Among them, the magnetic levitation bearing controller 3 is electrically connected to the eddy current sensor 5 (a type of displacement sensor) and the magnetic levitation bearing assembly 4. Specifically, the magnetic levitation bearing controller 3 is electrically connected to the axial magnetic bearing assembly 4.2, the radial magnetic bearing assembly 4.3, and the displacement sensor 4.4 of the magnetic levitation bearing assembly 4.

[0025] A slide groove 2.1 is opened at the top of one of the brackets 2, and an adjustment assembly is arranged in the slide groove 2.1; the adjustment assembly includes a screw rod 2.2 vertically arranged in the slide groove 2.1 and connected to the bracket 2 (the screw rod 2.2 is screwed into the bracket 2 or welded to the bracket 2), a nut 2.3 is screwed on the screw rod 2.2, and a lifting block 2.4 is arranged on the screw rod 2.2 above the nut 2.3. The screw rod 2.2 is inserted into the bottom of the lifting block 2.4, and both sides of the lifting block 2.4 are attached to the side walls of the slide groove 2.1, and the bottom abuts against the nut 2.3. Further, longitudinal guide grooves are opened on the side walls of the bracket 2 on both sides of the slide groove 2.1, and guide blocks are formed on both sides of the lifting block 2.4 and inserted into the corresponding guide grooves. Notch 2.5 for carrying the rotating shaft 4.1 and the bearing end of the magnetic levitation bearing assembly 4 are respectively opened on the lifting block 2.4 and the other bracket 2; by rotating the nut 2.3 up and down, the lifting block 2.4 is driven to linearly displace along the slide groove 2.1 to adjust the levelness of the magnetic levitation bearing assembly 4.

[0026] The eddy current sensor 5 is fixedly connected to the bracket 2 carrying the bearing end of the magnetic levitation bearing assembly 4 through a support member 6. The eddy current sensor 5 is located outside the bearing end of the magnetic levitation bearing assembly 4 and axially corresponds to the rotating shaft 4.1 of the magnetic levitation bearing assembly 4. At the same time, the eddy current sensor 5 is threadedly connected to the support member 6, and the distance from the rotating shaft 4.1 is changed by rotating the eddy current sensor 5.

[0027] When performing the detection, place the bearing end of the magnetic levitation bearing assembly 4 into the notch 2.5 of the right bracket 2, and place the rotating shaft 4.1 into the notch 2.5 of the lifting block 2.4 in the left bracket 2. Then, rotate the nut 2.3 upward or downward according to the inclination of the rotating shaft 4.1, so that the lifting block 2.4 follows the lifting and then drives the rotating shaft 4.1 to lift and lower to realize the adjustment of the levelness of the magnetic levitation bearing assembly 4.

[0028] After the levelness is adjusted, use bolts to fix the bearing end of the magnetic levitation bearing assembly 4 and the support member 6 installed with the eddy current sensor 5 to the corresponding bracket 2 together. Then rotate the eddy current sensor 5 to make the axial distance between its shaft end and the shaft end of the rotating shaft 4.1 of the bearing end about 0.8 mm. After the magnetic levitation bearing controller 3 is powered on, give instructions to the axial magnetic bearing assembly 4.2 and / or the radial magnetic bearing assembly 4.3 to control the left, right or left and right reciprocating movement of the rotating shaft 4.1, record the values of L1 and L2, record the readings of the eddy current sensor 5 at the same time, calculate L3 and L4, and then determine whether it meets the design requirements. If there are problems with the assembly, it can be adjusted in time through gaskets to avoid repeated disassembly and assembly caused by unqualified detection of L1, L2, L3, and L4 after the whole machine is assembled, resulting in low assembly efficiency, high cost and loss of accuracy after part wear.

[0029] The above is only the preferred embodiment of the utility model patent. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model patent, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the utility model patent.

Claims

1. A magnetic bearing assembly axial clearance and displacement sensor axial position detection tooling, characterized in that: It comprises two corresponding brackets; a slide groove is provided on the top of one of the brackets, and an adjustment component is provided in the slide groove; The adjustment assembly includes a screw rod vertically arranged in the slide groove and connected to the bracket, a nut is screwed on the screw rod, and a lifting block is arranged on the screw rod above the nut, the screw rod is inserted into the bottom of the lifting block, and the two sides of the lifting block are in contact with the side walls of the slide groove, and the bottom is in contact with the nut; The lifting block and another bracket are respectively provided with slots for carrying the rotating shaft and the bearing end of the magnetic suspension bearing assembly; the lifting block is driven to move linearly along the slide slot by rotating the nut up and down to adjust the horizontality of the magnetic suspension bearing assembly; Also included are eddy current sensors and magnetic bearing controllers; The eddy current sensor is arranged outside the bearing end of the magnetic suspension bearing assembly and is arranged axially corresponding to the rotating shaft of the magnetic suspension bearing assembly; The magnetic bearing controller is electrically connected to the eddy current sensor and the magnetic bearing assembly.

2. The axial clearance and displacement sensor axial position detection tooling of a magnetic bearing assembly according to claim 1 is characterized in that: The utility model also comprises a workbench, and two brackets and a magnetic bearing controller are all installed on the workbench.

3. The axial clearance and displacement sensor axial position detection tooling of a magnetic bearing assembly according to claim 1 is characterized in that: The eddy current sensor is fixedly connected to a bracket at the bearing end of the magnetic suspension bearing assembly through a support member, and the eddy current sensor is threadedly connected to the support member.

4. The axial clearance and displacement sensor axial position detection tooling of a magnetic bearing assembly according to claim 1 is characterized in that: Longitudinal guide grooves are provided on the side walls of the brackets on both sides of the slide groove, and guide blocks inserted into the corresponding side guide grooves are formed on both sides of the lifting block.

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