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Superimposed effect implicit lorentz force magnetic bearing

A superposition effect, magnetic bearing technology, applied in the direction of bearings, shafts and bearings, mechanical equipment, etc., can solve the problems of high air gap magnetic density, magnetic density fluctuation, reduce the uniformity of air gap magnetic density, etc., and achieve high magnetic density uniformity performance, high torque accuracy, and high magnetic field strength

Inactive Publication Date: 2018-01-12
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A high-torque magnetic levitation flywheel described in Chinese patent 201110253688.0 uses an explicit Lorentz force deflection magnetic bearing external to the magnetic steel to control the radial two-degree-of-freedom deflection of the rotor. The air gap magnetic density is high, but the permanent magnets in the winding edge area Flux leakage is obvious
In addition, the radius of the circle where the magnetic steel is located is relatively large, and the entire ring of magnetic steel needs to be spliced ​​with multiple pieces of magnetic steel. The gap at the splicing place will cause flux density fluctuations, which further reduces the uniformity of the air gap flux density.
Chinese patent 201610597382.X proposed a double permanent magnet implicit Lorentz force deflection magnetic bearing. The magnetic steel is placed between the upper and lower paramagnetic rings, which eliminates the flux density fluctuation caused by the splicing of the magnetic steel. The steel is far away from the winding, and the air gap magnetic field strength is low
A double-deflection implicit Lorentz force deflection magnetic bearing described in Chinese patent 201710220580.9 adopts a multi-turn magnetic steel and a double-winding structure, and has a high air-gap magnetic density and good uniformity, but it improves the air-gap magnetic field While increasing the strength and the output torque of the magnetic bearing, it also increases the axial dimension of the magnetic bearing

Method used

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specific Embodiment approach

[0019] The implicit Lorentz force deflection magnetic bearing of the superposition effect of the present invention, its preferred embodiment is:

[0020]It is mainly composed of a rotor system and a stator system. The rotor system mainly includes: outer mounting sleeve, outer magnetic ring, outer magnetic ring, outer upper radial magnetization magnet, outer lower radial magnetization magnet, outer axial magnetization Magnetic steel, outer upper paramagnetic ring, outer lower paramagnetic ring, outer magnetic steel lock nut, turntable, outer component lock nut, inner mounting sleeve, inner magnetic guide ring, inner magnetic isolation ring, inner upper radial magnetization Steel, inner and lower radially magnetized magnetic steel, inner axially magnetized magnetic steel, inner upper paramagnetic ring, inner lower paramagnetic ring, inner protective sleeve, inner magnetic steel lock nut and inner component lock nut; the stator system mainly includes : Stator skeleton, aluminum b...

specific Embodiment

[0026] Such as figure 1 , 2As shown, it is mainly composed of a rotor system and a stator system. The rotor system mainly includes: outer mounting sleeve 1, outer magnetic ring 2, outer magnetic ring 3, outer upper radial magnetization magnet 4A, outer lower radial magnetization Magnetic steel 4B, outer axially magnetized magnetic steel 5, outer upper paramagnetic ring 6A, outer lower paramagnetic ring 6B, outer magnetic steel lock nut 7, turntable 8, outer component lock nut 9, inner mounting sleeve 10, inner guide Magnetic ring 11, inner spacer magnetic ring 12, inner upper radial magnetization magnet 13A, inner lower radial magnetization magnet 13B, inner axial magnetization magnet 14, inner upper paramagnetic ring 15A, inner lower paramagnetic Ring 15B, inner protective sleeve 16, inner magnetic steel lock nut 17 and inner component lock nut 18; the stator system mainly includes: stator skeleton 19, aluminum substrate 20, left winding 21A, right winding 21B, front winding...

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Abstract

The invention discloses a superimposed effect implicit lorentz force deflection magnetic bearing composed of a rotor system and a stator system. The rotor system mainly comprises an outer installing sleeve, an outer magnetism conduction ring, an outer magnetism isolation ring, outer radial magnetizing magnetic steel, outer axial magnetizing magnetic steel, an outer paramagnetic ring, an outer magnetic steel lock nut, a rotary disc, an outer assembly lock nut, an inner installing sleeve, an inner magnetism conduction ring, an inner magnetism isolation ring, inner radial magnetizing magnetic steel, inner axial magnetizing magnetic steel, an inner paramagnetic ring, an inner protection sleeve, an inner magnetic steel lock nut and an inner assembly lock nut. The stator assembly mainly comprises a stator framework, an aluminum substrate, a left winding, a right winding, a front winding, a rear winding and epoxy resin adhesive. The magnetic steel is located in the magnetism conduction rings,and air gap flux density axial fluctuation of an explicit lorentz force magnetic bearing due to magnetic steel gap splicing is eliminated. In addition, magnetic flow generated by the radial magnetizing magnetic steel and magnetic flow generated by the axial magnetizing magnetic steel are overlapped at the air gap position, and the strength of the air gap flux density is improved on the premise that the axial size of the magnetic bearing is not increased.

Description

technical field [0001] The invention relates to a non-contact magnetic suspension bearing, in particular to an implicit Lorentz force magnetic bearing with superposition effect. Background technique [0002] According to the principle of electromagnetic force generation, active magnetic bearings can be divided into reluctance magnetic bearings and Lorentz force magnetic bearings. The former changes the magnetomotive force of the magnetic circuit by controlling the current of the magnetic pole winding coil, adjusts the size of the air gap magnetic flux, and generates the required suspension support force. The force and the current have a square relationship. After linearization, the linear range is narrow , the control precision is low. The latter generates the required suspension support force by controlling the magnitude and direction of the current placed in the constant magnetic field winding, and its force is proportional to the current, with good linearity and high con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C32/04
Inventor 刘强吴波赵勇俞建荣马丽梅
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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