Radial magnetic bearing of low-power consumption inner rotor of permanent-magnetic up-attracting and down-repelling structure

Abstract

The invention discloses a radial magnetic bearing of a low-power consumption inner rotor of a permanent-magnetic up-attracting and down-repelling structure, which consists of an outer magnetic conduction ring, an outer magnetic insulation ring, a stator core, a magnet exciting coil, an inner permanent-magnetic ring, a rotor core, an inner magnetic insulation ring, an inner magnetic conduction ring, an outer permanent-magnetic half ring, an air gap and a rotating shaft. The stator core is provided with eight electromagnetic poles and four permanent-magnetic poles in the positive and negative directions of an X axis and a Y axis, the outer magnetic insulation ring is arranged between a permanent-magnetic core and an electromagnetic core on a stator, and the outer permanent-magnetic half ring is clamped in the middle of two permanent-magnetic cores in the negative direction of the Y axis of the stator through the outer magnetic conduction ring. The air gap is reserved between the stator core and the rotor core, the inner magnetic insulation ring is arranged between a permanent-magnetic core ring and an electromagnetic core ring on a rotor, the inner magnetic conduction ring is arranged between the permanent-magnetic core rings, and the inner permanent-magnetic ring is clamped in the middle of the inner magnetic conduction ring. The radial magnetic bearing of the low-power consumption inner rotor has the advantages of low power consumption, simple control, convenient manufacture and the like, and can be used as a non-contact support component of rotary equipment such as wind driven generators, electro motors, molecular pumps, high-speed bearings, machine tools and the like.

Description

Technical field

[0001] The patent of the invention relates to a non-contact magnetic suspension bearing, especially a low-power inner rotor radial magnetic bearing with a permanent magnet up-suction and down-repulsion structure, which can replace the current mechanical bearing and can be used as a wind power generator, motor, molecular pump , High-speed bearings, non-contact supporting parts of rotating equipment such as machine tools. Background technique

[0002] Because the magnetic suspension bearing has the advantages of no contact, no lubrication, long life and low noise, it is of great significance in the fields that require friction reduction and high-speed operation. The application of magnetic suspension bearings in wind power generator systems removes the original mechanical bearings and The speed-up gear can reduce the minimum starting wind speed to about 1.5m / s, and increase the average annual power generation time by 30%-50%. At present, pure passive magnetic ...

Examples

Embodiment Construction

[0009] Such as figure 1 and figure 2 As shown, it is the basic implementation form of the technical solution of the present invention, which consists of 2 outer magnetic rings 1, 3 outer magnetic half rings 1, 1 permanent magnetic ring 9, 1 permanent magnetic half ring 11, and 12 stators Iron core 2, 8 excitation coils 3, 2 inner magnetic rings 6, 4 rotor cores 4, 12 air gaps 8, 2 inner magnetic isolation rings 7, and 2 outer magnetic isolation rings 9. Each stator core 2 includes 4 electromagnetic poles in the positive and negative directions of the X-axis and Y-axis, and 2 permanent magnet poles in the positive and negative directions of the Y-axis. The stator cores at the left and right ends form 8 electromagnetic poles and 4 A permanent magnetic pole, an excitation coil 3 is wound on the electromagnetic pole, an outer magnetic ring 1 is outside the stator core 2, and the outer magnetic ring 1 is connected with the outer magnetic ring 10, and between the two outer magneti...

Technical field

[0001] The patent of the invention relates to a non-contact magnetic suspension bearing, especially a low-power inner rotor radial magnetic bearing with a permanent magnet up-suction and down-repulsion structure, which can replace the current mechanical bearing and can be used as a wind power generator, motor, molecular pump , High-speed bearings, non-contact supporting parts of rotating equipment such as machine tools. Background technique

[0002] Because the magnetic suspension bearing has the advantages of no contact, no lubrication, long life and low noise, it is of great significance in the fields that require friction reduction and high-speed operation. The application of magnetic suspension bearings in wind power generator systems removes the original mechanical bearings and The speed-up gear can reduce the minimum starting wind speed to about 1.5m / s, and increase the average annual power generation time by 30%-50%. At present, pure passive magnetic ...

Examples

Embodiment Construction

[0009] Such as figure 1 and figure 2 As shown, it is the basic implementation form of the technical solution of the present invention, which consists of 2 outer magnetic rings 1, 3 outer magnetic half rings 1, 1 permanent magnetic ring 9, 1 permanent magnetic half ring 11, and 12 stators Iron core 2, 8 excitation coils 3, 2 inner magnetic rings 6, 4 rotor cores 4, 12 air gaps 8, 2 inner magnetic isolation rings 7, and 2 outer magnetic isolation rings 9. Each stator core 2 includes 4 electromagnetic poles in the positive and negative directions of the X-axis and Y-axis, and 2 permanent magnet poles in the positive and negative directions of the Y-axis. The stator cores at the left and right ends form 8 electromagnetic poles and 4 A permanent magnetic pole, an excitation coil 3 is wound on the electromagnetic pole, an outer magnetic ring 1 is outside the stator core 2, and the outer magnetic ring 1 is connected with the outer magnetic ring 10, and between the two outer magneti...

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