A suction type combined magnet axial passive magnetic bearing
A magnetic bearing and axial technology, applied in the direction of shafts and bearings, bearings, mechanical equipment, etc., can solve the problems of magnetic field fluctuations and large eddy current losses, and achieve the effects of reducing weight, eliminating losses, and reducing magnetic field fluctuations
Active Publication Date: 2016-06-22
HUACHI KINETIC ENERGY (BEIJING) TECH CO LTD
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Problems solved by technology
[0002] Magnetic suspension bearings are divided into active and passive types. Active magnetic suspension bearings are magnetic suspension bearings that superimpose the magnetic field generated by the control coil on the basis of bias magnetic fields. Passive magnetic suspension bearings are magnetic suspension bearings that are only made of permanent magnetic fields. Existing Passive magnetic bearings are divided into suction type and repulsion type passive magnetic bearings, most of which use the interaction between the stator permanent magnet and the rotor permanent magnet in the air gap to generate the force required for stability. , the stator permanent magnet and the rotor permanent magnet must be spliced in blocks, which will cause the magnetic field fluctuation of the stator permanent magnet and the rotor permanent magnet at the splicing of the blocks, which will cause the magnetic field in the air gap to fluctuate, and there will be eddy current loss at high speed big flaw
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[0018] figure 1 It is the basic form of the present invention, consisting of a stator part and a rotor part, and the stator part is composed of a first stator permanent magnet 11, a second stator permanent magnet 12 and a third stator permanent magnet 13, which are placed in sequence along the axial direction as the first stator permanent magnet 11, the second stator permanent magnet 12 and the third stator permanent magnet 13 A stator permanent magnet 11, a second stator permanent magnet 12 and a third stator permanent magnet 13, the first stator permanent magnet 11 is magnetized along the radial -y direction, and the second stator permanent magnet 12 is charged along the axial +z direction Magnetic, the third stator permanent magnet 13 is magnetized along the radial +y direction; the outer side of the stator part is the rotor part, and the rotor part consists of the first rotor permanent magnet 21, the second rotor permanent magnet 22, the third rotor permanent magnet 23, the...
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The invention relates to a non-contact magnetic suspension bearing, in particular to an axial passive magnetic bearing with combined magnets of suction force, which can be used as non-contact support for rotating parts in mechanical equipment such as large-volume magnetic suspension flywheels and machine tools. The passive magnetic bearing of the present invention has a stator part and a rotor part, and the stator part and the rotor part form a magnetic air gap, wherein the stator part is composed of three stator permanent magnets, all of which are sintered permanent magnets, and the rotor part is composed of five rotor permanent magnets, It is divided into three sintered permanent magnets and two laminated permanent magnets, forming a composite magnet between them. The present invention saves the axial sensor, the control coil and the power amplifier circuit required by the control coil. In particular, the present invention adopts a combined magnet structure, which can effectively smooth the magnetic field fluctuation in the air gap, and greatly reduce the The high-speed eddy current loss brought by the block is adopted.
Description
technical field [0001] The invention relates to a non-contact magnetic suspension bearing, in particular to an axially passive outer rotor magnetic suspension bearing structure of a suction combined magnet, which can be used as a non-contact support for rotating parts in large-volume magnetic suspension flywheels, machine tools and other mechanical equipment. Background technique [0002] Magnetic suspension bearings are divided into active and passive types. Active magnetic suspension bearings are magnetic suspension bearings that superimpose the magnetic field generated by the control coil on the basis of bias magnetic fields. Passive magnetic suspension bearings are magnetic suspension bearings that are only made of permanent magnetic fields. Existing Passive magnetic bearings are divided into suction type and repulsion type passive magnetic bearings, most of which use the interaction between the stator permanent magnet and the rotor permanent magnet in the air gap to gene...
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IPC IPC(8): F16C32/04
CPCF16C32/0419
Inventor 孙津济王曦王春娥
Owner HUACHI KINETIC ENERGY (BEIJING) TECH CO LTD