Composite radial magnetic bearing
A magnetic bearing and hybrid technology, applied in the field of magnetic bearings, can solve the problems of poor electromagnetic compatibility, difficulty in making the inner diameter larger, and difficulty in improving the strength of the shaft, and achieve the effect of increased strength and good electromagnetic compatibility
Inactive Publication Date: 2020-07-21
坎德拉(深圳)科技创新有限公司
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Problems solved by technology
The magnetic bearing with this structure has some defects: under the premise of setting the outer diameter, it is difficult to make the inner diameter larger, so that it is difficult to increase the strength of the rotating shaft matched with the magnetic bearing; in addition, because there is no electromagnetic shielding on the top side of the stator, It is easy to diverge the magnetic field, resulting in poor electromagnetic compatibility, and it is easy to affect the signal quality of nearby sensors
Method used
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[0019] Now in conjunction with the accompanying drawings, the preferred embodiments of the present invention will be described in detail.
[0020] see figure 1 , figure 2 and image 3 , figure 1 It is a schematic diagram of the combined sectional structure of the hybrid radial magnetic bearing of the present invention. figure 2 It is a schematic diagram of an exploded view structure of the hybrid radial magnetic bearing of the present invention. image 3 It is a schematic diagram of the decomposed three-dimensional structure of the hybrid radial magnetic bearing of the present invention. The present invention proposes a hybrid radial magnetic bearing 10 , which generally includes: a rotor 1 , a stator 2 , a winding 3 , two magnetic plates 4 , 8 , two permanent magnets 5 , 7 and a magnetic ring 6 . Wherein, the first permanent magnet 5 forms a first permanent magnet bias magnetic field F1, the second permanent magnet 7 forms a second permanent magnet bias magnetic field ...
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The invention provides a composite radial magnetic bearing. The composite radial magnetic bearing comprises a rotor, a stator, a winding, a magnetism guiding ring, a first permanent magnet, a second permanent magnet, a first magnetism guiding plate, and a second magnetism guiding plate, wherein the rotor extends up and down; the stator is horizontally arranged at the middle part of the periphery of the rotor in a surrounding manner; the winding is arranged on the stator in an up-and-down surrounding manner; the magnetism guiding ring is horizontally arranged on the periphery of the rotor and the periphery of the stator in the surrounding manner; the first permanent magnet and the second permanent magnet are horizontally arranged on the periphery of the rotor in a surrounding manner, and are located on the top side and the bottom side of the magnetism guiding ring; and the first magnetism guiding plate and the second magnetism guiding plate are horizontally arranged on the periphery ofthe rotor in the surrounding manner, and are separately located on the top side of the first permanent magnet and the bottom side of the second permanent magnet. According to the magnetism guiding ring disclosed by the invention, forming of a balanced magnetic field between the rotor and the stator is facilitated, and preferable electromagnetic compatibility is obtained; and under the premise thatthe outer diameter dimension of the rotor is set, the inner diameter dimension can be guaranteed to be enlarged, and increment of intensity of the rotating shaft is facilitated.
Description
technical field [0001] The invention relates to a magnetic bearing, in particular to a hybrid radial magnetic bearing. Background technique [0002] An existing hybrid radial magnetic bearing comprises: a rotor extending up and down, a stator horizontally surrounding the rotor and above it, windings surrounding the stator up and down, a magnetic conducting ring extending up and down outside the stator, and a magnetic conducting ring located on the outside of the stator. The permanent magnet on the lower side and surrounds the rotor, and the magnetically conductive plate horizontally surrounds the rotor and is located on the bottom side of the permanent magnet. The magnetic bearing with this structure has some defects: under the premise of setting the outer diameter, it is difficult to make the inner diameter larger, so that it is difficult to increase the strength of the rotating shaft matched with the magnetic bearing; in addition, because there is no electromagnetic shield...
Claims
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IPC IPC(8): F16C32/04
CPCF16C32/0459
Inventor 刘成涛
Owner 坎德拉(深圳)科技创新有限公司