AXIAL PERMANENT MAGNETIC SUSPENSION BEARING HAVING MICRO-FRICTION OR NO FRICTION OF PIVOT POINT

摘要

Disclosed is an axial permanent magnetic suspension bearing having micro-friction or no friction of pivot point, comprising a support bearing disposed on a vertical shaft, and a permanent magnetic suspension bearing disposed on the vertical shaft, wherein the permanent magnetic suspension bearing comprises a stator pull-push magnet provided on stator, and a rotor pull-push magnet correspondingly provided on a rotor by means of a soft magnetic material base and separated from the stator pull-push magnet by an axial gap to form a pull-push magnetic circuit, wherein said stator pull-push magnet and said rotor pull-push magnet are respectively composed of two or more than two annular permanent magnets provided as radially closely fitting and with magnetic poles alternating in the radial direction.

主权项

1. An axial permanent magnetic suspension bearing having micro-friction or no friction of pivot point, comprising a support bearing as pivot point disposed on a vertical shaft serving as a rotor, and a permanent magnetic suspension bearing disposed on the vertical shaft and spaced from the support bearing by an axial distance, wherein the permanent magnetic suspension bearing comprises a stator pull-push magnet provided on a stator, and a rotor pull-push magnet correspondingly provided on a rotor by means of a soft magnetic material base and separated from the stator pull-push magnet by an axial gap to form a pull-push magnetic circuit, wherein said stator pull-push magnet and said rotor pull-push magnet are respectively composed of two or more than two annular permanent magnets provided as radially closely fitting and with magnetic poles alternating in the radial direction, and upper and lower annular permanent magnets correspondingly in the same radial position have the same magnetic strength and inverse polarity, wherein the axial gap is within an effective range of magnetic force of the two pull-push magnets, the stator pull-push magnet is above the rotor pull-push magnet, the annular surfaces of the annular permanent magnets of the stator pull-push magnet and the rotor pull-push magnet which are near the vertical shaft are spaced from the surface of the vertical shaft by a radial distance.