Radial magnetic bearing rotating device

Abstract

The present application relates to the technical field of bearing displacement, in particular to a radial magnetic suspension bearing rotating device, which comprises a bearing seat, a magnetic suspension bearing stator, a magnetic suspension bearing rotor, a main shaft, a thrust ring, a sensor support, displacement sensors and a zero calibration tool, the bearing seat provides installation conditions for the magnetic suspension bearing stator, the sensor support provides installation conditions for the displacement sensors, the displacement sensors are installed on the sensor support, the sensor support is installed on the bearing seat, the zero calibration tool is installed on the bearing seat, the zero of each displacement sensor is calibrated by using a multimeter, the gap between the displacement sensor probe and the displacement measurement surface is adjusted through the sensor support, and then the zero point of each displacement sensor is reached, the sensor support and the bearing seat of the device are assembled as a whole with other parts, the problem of repeated assembly and disassembly of conventional zero calibration methods on parts is avoided, and the complexity and difficulty of zero calibration are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearing displacement, in particular to a radial magnetic suspension bearing rotating device. BACKGROUND

[0002] The application of magnetic suspension bearing technology is more and more dependent on high-speed rotating devices and fully-closed rotating devices. Unlike oil bearings, it uses magnetic force to suspend the rotor in the air, so that there is no mechanical contact between the rotor and the stator. The principle is that the magnetic induction line is perpendicular to the magnetic suspension line, and the shaft core is parallel to the magnetic suspension line. In order to make the rotor run stably, it is necessary to ensure that the rotor runs on a fixed track. Therefore, when using a radial magnetic suspension bearing, it is necessary to monitor the shaft track near the radial magnetic suspension bearing. Usually, four displacement sensors are arranged uniformly around the radial magnetic suspension bearing, and the sensors must be zeroed before the device is put into operation to ensure the accuracy of the monitored shaft track.

[0003] The existing zeroing technology usually assembles the main body of the device, the rotor and the radial magnetic suspension bearing, powers on the device, makes the rotor suspended in the working state, and tests whether all displacement sensors are at zero point. If not, the assembled device components need to be disassembled. The displacement sensor is usually located inside the device near the radial magnetic suspension bearing. After adjusting the installation gap between the displacement sensor and the rotor, the device is reassembled, powered on and zeroed. This method not only needs to power on the device, but also needs to disassemble and assemble the device multiple times, which is difficult. SUMMARY

[0004] The present application aims to provide a radial magnetic suspension bearing rotating device, which aims to solve the problem of difficult calibration of the existing radial magnetic suspension bearing displacement sensor.

[0005] To achieve the above-mentioned purpose, in a first aspect, the present application provides a radial magnetic suspension bearing rotating device, which comprises a bearing seat, a magnetic suspension bearing stator, a magnetic suspension bearing rotor, a main shaft, a thrust ring, a sensor support, a displacement sensor and a zeroing tool. The magnetic suspension bearing stator is arranged in the bearing seat, the magnetic suspension bearing rotor is arranged on the side of the magnetic suspension bearing stator away from the bearing seat, the main shaft is arranged on the inner side of the magnetic suspension bearing rotor, the thrust ring is sleeved on the main shaft, the sensor support is arranged on the side of the bearing seat close to the thrust ring, the displacement sensor is arranged on the outer side of the sensor support, and the zeroing tool is detachably connected with the bearing seat and located on the side close to the thrust ring.

[0006] The radial magnetic suspension bearing rotating device further comprises a bearing stopper, which is arranged on one side of the magnetic suspension bearing stator and the bearing seat.

[0007] The measuring surface outer diameter of the zero calibration tool is the same as the outer diameter size and tolerance of the thrust ring.

[0008] Four mounting grooves are arranged on the sensor support.

[0009] The zero calibration tool is radially matched with the bearing seat.

[0010] In a second aspect, a zero calibration method of a radial magnetic suspension bearing displacement sensor includes the following steps:

[0011] Four displacement sensors are mounted on the sensor support.

[0012] The sensor support is mounted on the bearing seat, and the zero calibration tool is mounted on the bearing seat.

[0013] The zero calibration of each displacement sensor is performed by using a multimeter, and the gap between the displacement sensor probe and the displacement measuring surface is adjusted by the sensor support, so as to achieve the zero point purpose.

[0014] The bearing seat provides mounting conditions for the magnetic suspension bearing stator, and the sensor support provides mounting conditions for the displacement sensor. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiment or prior art description will be briefly introduced.

[0016] Figure 1 is a schematic diagram of a working state of a radial magnetic suspension bearing rotating device.

[0017] Figure 2 is a side view of a zero calibration state of a radial magnetic suspension bearing rotating device using tool.

[0018] Figure 3 is a front view of a zero calibration state of a radial magnetic suspension bearing rotating device using tool.

[0019] 101-bearings seat, 102-magnetic suspension bearing stator, 103-magnetic suspension bearing rotor, 104-main shaft, 105-thrust ring, 106-sensor support, 107-displacement sensor, 108-zero calibration tool, 109-bearing stop block, 110-mounting groove. DETAILED DESCRIPTION

[0020] The first embodiment of the present application is:

[0021] Please refer to Figures 1-3 , Figure 1 is a schematic diagram of the working state of the present application, Figure 2 is a side view of the tool zero calibration state of the present application, Figure 3 is a front view of the tool zero calibration state of the present application, including a bearing seat 101, a magnetic suspension bearing stator 102, a magnetic suspension bearing rotor 103, a main shaft 104, a thrust ring 105, a sensor bracket 106, a displacement sensor 107, a zero calibration tool 108 and a bearing stopper 109, four mounting grooves 110 are provided on the sensor bracket 106, which can solve the problem of difficult calibration of the existing radial magnetic suspension bearing displacement sensor 107. It can be understood that the foregoing scheme can be used for bearing zero calibration, and can also solve the problem of high zero calibration processing cost.

[0022] For this specific embodiment, the magnetic suspension bearing stator 102 is arranged in the bearing seat 101, the magnetic suspension bearing rotor 103 is arranged on the side of the magnetic suspension bearing stator 102 away from the bearing seat 101, the main shaft 104 is arranged on the inner side of the magnetic suspension bearing rotor 103, the thrust ring 105 is sleeved on the main shaft 104, the sensor bracket 106 is arranged on the side of the bearing seat 101 close to the thrust ring 105, the displacement sensor 107 is arranged on the outer side of the sensor bracket 106, the zero calibration tool 108 is detachably connected with the bearing seat 101 and located on the side close to the thrust ring 105, the bearing seat 101 provides installation conditions for the magnetic suspension bearing stator 102, and the sensor bracket 106 provides installation conditions for the displacement sensor 107. This device takes the sensor bracket 106 and the bearing seat 101 as a whole and is assembled with other parts, avoiding the problem of repeated assembly and disassembly of parts in conventional zero calibration method, the zero calibration tool 108 and the sensor bracket 106 are simple in structure and low in processing cost, reducing the complexity and difficulty of zero calibration, the magnetic suspension bearing rotor 103 generates electromagnetic attraction force with the magnetic suspension bearing stator 102 to realize rotor magnetic suspension, the main shaft 104 is a motor rotor and a rotor in a rotating device, the thrust ring 105 prevents the magnetic suspension bearing rotor 103 from loosening in unexpected situations and provides a displacement signal monitoring surface for the stator control of the magnetic suspension bearing, solving the problem of difficult calibration of the existing radial magnetic suspension bearing displacement sensor 107.

[0023] The bearing block 109 is arranged on one side of the magnetic suspension bearing stator 102 and the bearing seat 101, and is used for fixing the magnetic suspension bearing stator 102 on the bearing seat 101.

[0024] Secondly, the outer diameter of the measuring surface of the zero calibration tool 108 is completely same as the outer diameter of the thrust ring 105, the outer diameter of the upper displacement measuring surface of the zero calibration tool 108 is completely same as the outer diameter of the thrust ring 105, and the ΦD surface is processed by one knife in processing, which has good coaxiality and ensures that the state of the upper displacement measuring surface of the zero calibration tool 108 and the displacement sensor 107 is consistent with the actual state or even has higher accuracy.

[0025] Meanwhile, the zero calibration tool 108 is radially matched with the bearing seat 101, the radial design gap of the magnetic suspension radial bearing and the main shaft 104 is 0.3-0.5mm on one side, and the radial matching size ΦD of the zero calibration tool 108 and the bearing seat 101 uses high-precision matching (the maximum gap on one side is 0.03mm) of H6 / h5.

[0026] In addition, the installation groove 110 is arranged to facilitate the adjustment of the sensor.

[0027] When the displacement sensor 107 is calibrated, four displacement sensors 107 are installed on the sensor support 106, the sensor support 106 on which the displacement sensor 107 is installed is installed on the bearing seat 101, the zero calibration tool 108 is installed on the bearing seat 101, and the zero of each displacement sensor 107 is calibrated by using a multimeter and adjusting the gap between the probe of the displacement sensor 107 and the displacement measuring surface through the sensor support 106.

[0028] The second embodiment of the present application is:

[0029] A zero calibration method of a radial magnetic suspension bearing displacement sensor, comprising the following steps:

[0030] S1 installing four displacement sensors 107 on a sensor support 106;

[0031] S2 installing the sensor support 106 on a bearing seat 101 and installing a zero calibration tool 108 on the bearing seat 101;

[0032] S3 calibrating each displacement sensor 107 by using a multimeter and adjusting the gap between the probe of the displacement sensor 107 and the displacement measuring surface through the sensor support 106, so as to achieve the purpose of zero.

[0033] The above disclosure only shows one or more preferred embodiments of the present application, and cannot limit the scope of the present application. Those skilled in the art can understand that the implementation of all or part of the above processes, and the equivalent changes made according to the claims of the present application, still belong to the scope covered by the present application.

Claims

1. A radial magnetic levitation bearing rotation device, characterized in that, The device includes a bearing housing, a magnetic levitation bearing stator, a magnetic levitation bearing rotor, a main shaft, a thrust ring, a sensor bracket, a displacement sensor, and a zeroing fixture. The magnetic levitation bearing stator is disposed within the bearing housing, the magnetic levitation bearing rotor is disposed on the side of the magnetic levitation bearing stator away from the bearing housing, the main shaft is disposed inside the magnetic levitation bearing rotor, the thrust ring is sleeved on the main shaft, the sensor bracket is disposed on the side of the bearing housing near the thrust ring, the displacement sensor is disposed on the outside of the sensor bracket, and the zeroing fixture is detachably connected to the bearing housing and is located near the thrust ring.

2. The radial magnetic levitation bearing rotating device as described in claim 1, characterized in that, The radial magnetic levitation bearing rotating device also includes a bearing stop, which is disposed on one side of the magnetic levitation bearing stator and the bearing housing.

3. The radial magnetic levitation bearing rotating device as described in claim 1, characterized in that, The outer diameter of the measuring surface of the zeroing fixture is exactly the same as the outer diameter and tolerance of the thrust ring.

4. The radial magnetic levitation bearing rotating device as described in claim 1, characterized in that, The sensor bracket has four mounting slots.

5. The radial magnetic levitation bearing rotating device as described in claim 1, characterized in that, The zeroing tooling is radially fitted to the bearing housing.

6. A zeroing method for a radial magnetic levitation bearing displacement sensor, applied to the radial magnetic levitation bearing rotating device as described in claim 1, characterized in that, Includes the following steps: Four displacement sensors are mounted on the sensor bracket; Install the sensor bracket onto the bearing housing, and install the zeroing fixture onto the bearing housing; Use a multimeter to zero each displacement sensor, and adjust the gap between the displacement sensor probe and the displacement measurement surface using the sensor bracket to achieve the zero point.

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