Single degree of freedom magnetic suspension rotor support system as well as magnetic bearing and weight losing method

Abstract

The invention discloses a single degree of freedom magnetic suspension rotor support system as well as a magnetic bearing and weight losing method. The support system is composed of complete permanent magnetic radial magnetic suspension bearings, or driving / driven mixed type magnetic suspension bearings, or complete permanent magnetic pre-stress magnetic suspension bearings, as well as a weight losing bias magnet device and a radial / axial air gap limit protection device, wherein, the complete permanent magnetic radial magnetic suspension bearings, or driving / driven mixed type magnetic suspension bearings, or complete permanent magnetic pre-stress magnetic suspension bearings are arranged at the left and right of an electric motor (5) and maintain good proper alignment with the stator / rotor parts of the electric motor. By utilizing the synergic action of the axial stabilizing force of electric motor and the radial stabilizing force of magnetic bearings, the rotating part in the system is constrained in a single degree of freedom magnetic suspension state of only doing tangential dead axle rotation. The complete permanent magnetic radial magnetic suspension bearings (6, 7) are formed by respectively arranging two annular permanent magnets and maintaining the heights of interfaces at two sides to be symmetrical and the interfaces at two sides to attract each other via axial air gap, wherein the two annular permanent magnets are magnetized axially, have equivalent magnetic pole face, different volumes and magnetic attraction forces, and are respectively provided with an external magnetism conductive yoke.

Description

Technical field: [0001] The invention relates to a single-degree-of-freedom magnetic levitation rotor support system, in particular to a self-stabilizing single-degree-of-freedom magnetic levitation rotor support system that can not use feedback control technology. The invention also relates to a magnetic suspension bearing device constituting a single-degree-of-freedom magnetic suspension rotor support system, including an all-permanent radial magnetic suspension bearing, an all-permanent permanent magnet prestressed magnetic suspension shaft, an active-passive hybrid magnetic suspension bearing, and a method for setting up a motor and a generator. The invention also relates to a weight-reducing bias magnet device and a setting method for reducing the gravity harm of the rotating body to the magnetic suspension bearing. The invention also relates to a radial-axial air gap limit protection device for the magnetic suspension bearing in the single-degree-of-freedom magnetic susp...

AI Technical Summary

Problems solved by technology

In addition, the permanent magnets in the prior art have a large amount of leakage magnetic field on the non-working air gap side, which also reduces the effective utilization of the permanent magnet's magnetic energy.

At the same time, in the permanent magnet magnetic suspension bearings of the prior art, the method of evenly distributing the permanent magnet volume between the fixed and dynamic parts is not conducive to improving the effective load capacity of the permanent magnetic magnetic suspension bearing.

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