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Permanent magnet biased axial magnetic bearing

A technology of axial magnetic bearing and permanent magnetic bias, which is applied in the field of magnetic suspension to achieve uniform air gap, reduce power consumption, improve dynamic response speed and control accuracy

Active Publication Date: 2020-11-13
SHANDONG TIANRUI HEAVY IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problems described above

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  • Permanent magnet biased axial magnetic bearing
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Embodiment Construction

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0024] The invention adopts the permanent magnet to provide the bias magnetic flux without the bias current, and reduces the power consumption of the magnetic bearing;...

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Abstract

The invention provides a permanent magnet biased axial magnetic bearing which comprises a first magnetic bearing stator assembly and a second magnetic bearing stator assembly symmetrically arranged onthe two sides of a rotor, wherein the magnetizing direction of the first magnetic bearing stator assembly is opposite to that of the second magnetic bearing stator assembly; a first annular groove and a second annular groove are concentrically formed in the end surface, facing the rotor, of a first stator core of the first magnetic bearing stator assembly, a first stator permanent magnet is embedded into the first annular groove, and a first stator winding winds in the second annular groove; when the first magnetic bearing stator assembly is magnetized, the end, facing the rotor, of the firstmagnetic bearing stator assembly is divided into three relatively independent stator magnetic poles by a first gap and the second annular groove. The permanent magnet biased axial magnetic bearing separates an electromagnetic magnetic flow from a permanent magnet magnetic flow, the power consumption of the magnetic bearing is reduced and the dynamic response speed and the control precision of themagnetic bearing are improved.

Description

technical field [0001] The invention relates to the technical field of magnetic suspension, in particular to a permanent magnetic bias axial magnetic bearing. Background technique [0002] Traditional rotating power machines are supported by mechanical bearings, which are restricted by mechanical bearing friction and rotor vibration, so they can only run at low speeds, with low power density and low efficiency. In industrial applications such as high speed and high energy density, a multi-pole speed-up mechanism is required, resulting in a large system, high energy consumption, poor reliability, serious noise pollution and oil pollution. The high-speed rotating power machinery supported by magnetic bearings eliminates friction and wear, does not require lubrication, and has a speed of up to tens of thousands of revolutions per minute. It has the advantages of high power density, small size, light weight, and fast response. It can effectively improve system efficiency and hav...

Claims

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Application Information

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IPC IPC(8): F16C32/04
CPCF16C32/0463F16C32/0465F16C32/0476
Inventor 李永胜张海刚刘辉赵明师吕前阔王学伟张婕妤刘璐郑伟张宝燕
Owner SHANDONG TIANRUI HEAVY IND CO LTD
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