Hybrid Excitation Shaft Radial Magnetic Suspension Bearing

A magnetic levitation bearing and mixed excitation technology, applied in the direction of shafts and bearings, bearings, mechanical equipment, etc., can solve the problems of coil heating, bearing electric power, etc., to reduce loss and temperature rise, low loss and temperature rise, and reduce ampere-turns number effect

Active Publication Date: 2011-12-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems existing in the existing magnetic suspension bearings when a large suspension force is required, the electric power consumed by the bearing is large and the coil heats up seriously, the present invention proposes three kinds of hybrid excitation shaft radial magnetic suspension bearings

Method used

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  • Hybrid Excitation Shaft Radial Magnetic Suspension Bearing
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specific Embodiment approach 1

[0013] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 1. The hybrid excitation shaft radial magnetic suspension bearing described in this embodiment includes a stator, a rotor, and an air gap; the stator includes a stator core 1, a radial force control winding 2, an axial force control winding 3, and stator permanent magnets 4. The stator core 1 is cylindrical, and 4n slots are opened in the axial direction on the inner surface of the cylindrical stator core 1, and 4n teeth are formed on the inner side of the stator core 1, where n is a natural number greater than 1, and along the circumference The 1st, 3rd, ..., (4n-1) teeth are axial winding teeth, the 2nd, 4th, ..., 4n teeth are radial winding teeth, and the axial winding teeth are double-toothed structures, see figure 2 As shown, the double-tooth structure is obtained by slotting along the circumferential direction at the axial middle position of the inner end surface of the axial winding tooth, and an axial force cont...

specific Embodiment approach 2

[0016] Specific Embodiment 2. The hybrid excitation shaft radial magnetic suspension bearing described in this embodiment includes a stator, a rotor and an air gap; the stator includes a stator core 1, a radial force control winding 2, an axial force control winding 3 and a stator permanent magnet 4; The stator core 1 is cylindrical, and 4n slots are opened in the axial direction on the inner surface of the cylindrical stator core 1, and 4n teeth are formed on the inner side of the stator core 1, where n is a natural number greater than 1, and the th 1, 3, ..., 4n-1 teeth are radial force winding teeth, and the 2nd, 4th, ..., 4n teeth are axial force winding teeth; each radial force winding tooth is wound with a diameter A direction force control coil, and a tile-shaped stator permanent magnet 4 is pasted and fixed on the inner end surface of each radial force winding tooth, and the stator permanent magnet 4 is radially magnetized or radially parallel magnetized , the magnetiz...

specific Embodiment approach 3

[0018] Specific Embodiment 3. The hybrid excitation shaft radial magnetic suspension bearing described in this embodiment includes a stator, a rotor and an air gap; the stator includes a stator core 1, a radial force control winding 2, an axial force control winding 3 and a stator permanent magnet 4; The stator core 1 is cylindrical, and the inner surface of the cylindrical stator core 1 is provided with 4n slots in the axial direction, and 4n teeth are formed on the inner side of the stator core 1, wherein n is a natural number greater than 1, and the stator core 1 The yoke between every two adjacent teeth is slotted in the axial direction, and a flat-shaped stator permanent magnet 4 is embedded in the groove, and the flat-shaped stator permanent magnet 4 is magnetized tangentially along the circumference , and the magnetization direction of each adjacent two flat-plate stator permanent magnets 4 is opposite; the 1st, 3rd, ..., 4n-1 teeth are radial force control coil teeth, a...

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Abstract

The invention relates to a mixed excitation shaft radial magnetic suspension bearing, and relates to the mixed excitation shaft radial magnetic suspension bearing, solving problems of high electric power consumed by the bearing and severe coil heating of the existing magnetic suspension bearing when great suspension power is required. According to the invention, the inner side of a stator core isprovided with 4n teeth, the first, the third,... (4n-1) teeth are axial winding teeth of a dual-tooth structure circumferentially; an axial force control coil is wound on each dual-tooth structure respectively; the winding directions of the two axial force control coils are opposite and are connected in series; a tile-shaped stator permanent magnet is respectively pasted and fixed on the inner end surface of the dual-tooth structure, the second, the fourth,... 4n teeth are radial winding teeth, one radial force control coil is wound on each radial winding tooth, and two radial force control coils which are opposite in a circumference in 180 degrees are connected in series reversely, and a radial force control coil set is formed; and a rotor magnetic conduction yoke cylinder is positioned in a stator, and is coaxial with the stator.

Description

technical field [0001] The invention relates to a hybrid excitation shaft radial magnetic suspension bearing, which belongs to the technical field of bearings. Background technique [0002] Magnetic bearing, also known as active magnetic suspension bearing, is a new type of high-performance bearing without mechanical contact between the rotor and the stator. Compared with traditional ball bearings, sliding bearings and oil film bearings, magnetic suspension bearings use electromagnetic force to suspend the rotor in space, there is no mechanical contact between the stator and rotor, and the rotor can reach a very high speed, with small mechanical wear and energy consumption. Low noise, long life, no lubrication, no oil pollution, etc., especially suitable for special environments such as high speed, vacuum, and ultra-clean. It can be widely used in the fields of mechanical processing, turbomachinery, aerospace, petroleum and petrochemical, vacuum technology, energy, rotor dy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C32/04
Inventor 寇宝泉吴太箭周一恒刘奉海
Owner HARBIN INST OF TECH
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