Permanent magnet bearing with large bearing capacity and damping performance

Abstract

The invention relates to a permanent magnet bearing with large bearing capacity and damping performance. A bearing stator is arranged at the upper part of an axial air gap, a stator soft magnetic ring (1) is provided with an annular groove, and a stator inner insulating magnetic ring (13), a carrying permanent magnet inner ring (4), a stator carrying bearing limit ring (3), a stator carrying permanent magnet outer ring (2), a stator damping permanent ring (5) and a stator outer insulating ring (6) are arranged in the annular groove from the inner circle to the outer circle; a bearing rotor is arranged at the lower part of the axial air gap and is provided with another annular groove, and a rotor inner insulating magnetic ring (11), a rotor damping permanent magnet ring (12), a rotor bearing permanent magnet inner ring (10), a rotor carrying bearing limit ring (9), a rotor carrying permanent magnet outer ring (8) and a rotor outer insulating ring (7) are arranged in the annular groove from the inner circle to the outer circle. When the rotor vibrates in horizontal direction, the permanent magnet bearing with the structure can provide eddy current damping to help the rotor to pass the critical rotating speed successfully; in addition, an eddy current damper and the permanent magnet bearing are integrated into a whole, thereby achieving compact structure and saving space.

Description

technical field [0001] The invention relates to a permanent magnetic bearing capable of providing large axial and radial bearing capacity and damping performance, belonging to the technical field of magnetic suspension bearings. This type of permanent magnetic bearing can be used in rotating mechanical systems such as high-speed flywheel energy storage systems. Background technique [0002] Magnetic bearings are a type of bearings that use magnetic force to levitate a rotating shaft. At present, there are superconducting magnetic levitation, electromagnetic levitation, permanent magnetic levitation and other levitation methods, and some are a combination of the two. Due to the advantages of high speed, no mechanical wear, high reliability, and adjustable dynamic characteristics, magnetic suspension bearings are very suitable for rotating machinery such as high-speed centrifuges and flywheel energy storage systems. Superconducting magnetic levitation bearings have a high loa...

AI Technical Summary

Problems solved by technology

[0004] technical problem: Aiming at the lack of axial and radial bearing capacity of the traditional double-ring permanent magnetic bearing, the present invention provides a permanent magnetic bearing with large axial and radial bearing capacity and damping performance; it combines the eddy current damper and the magnetic bearing into one , so that the rotor can pass through the critical speed smoothly, and has good dynamic characteristics

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