Magnetism-gas mixed hybrid bearing and installation method thereof

Abstract

The invention discloses a magnetism-gas mixed hybrid bearing and an installation method thereof, and aims to solve the technical problems of lower bearing capacity and dynamic rigidity of a magnetic bearing in the prior art and narrower application working condition of a magnetism-gas mixed bearing. The magnetism-gas mixed hybrid bearing is mounted on a rotating shaft, and comprises an inner magnetic pole sleeving the rotating shaft; the inner magnetic pole is arranged in an outer magnetic pole through a repulsion gap; a throttling hole penetrating in the radial direction is formed in the outer peripheral surface of the outer magnetic pole; the cross section of the inner peripheral surface of the outer magnetic pole is olive-shaped, or a dynamic-pressure generation groove is formed in theinner peripheral surface of the outer magnetic pole; the outer magnetic pole is matched and connected with a bearing tool; the bearing tool is provided with a gas supply hole whose one end is connected with the throttling hole; and the other end of the air supply hole is connected with an external gas source. The magnetism-gas mixed hybrid bearing synthesizes the advantages of a magnetic bearing,a static-pressure gas bearing and a dynamic-pressure gas bearing, achieves excellent stable-state and instant-state performances, and in addition, improves the adaptability to multi-directional load working conditions through application a spherical bearing.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to a magnetic gas hybrid dynamic and static pressure bearing. Background technique [0002] Magnetic bearing is a kind of non-contact high-performance bearing manufactured by using the principle that the same poles of magnets repel each other. Compared with traditional ball bearings, sliding bearings and oil film bearings, magnetic bearings have no mechanical contact, and the rotor can reach high operating speeds. It has small mechanical wear, low energy consumption, low noise, long life, no lubrication, and no oil pollution. And other advantages, especially suitable for high-speed, vacuum, ultra-clean and other special environments. [0003] The Chinese patent with authorized notification number CN 102052402 B discloses a permanent magnetic suspension bearing, including: an inner ring, the inner ring is a permanent magnet; an outer ring, the inner ring is sleeved in the outer rin...

AI Technical Summary

Problems solved by technology

[0009] The present invention overcomes the problems in the prior art: (1) the simple permanent magnetic levitation bearing needs an auxiliary bearing when it is working, the load capacity and dynamic stiffness are low, the damping is small, the control system is complex, and it is easy to cause overheating; (2) the magnetic-gas mixed static Pressure bearings require a large amount of air supply, and have high requirements for the quality and air supply capacity of the external air supply source, which is not applicable in some working conditions with harsh environments; (3) Magnetic-pneumatic hybrid dynamic pressure bearings The bearing capacity is weak and cannot be applied to the technical problem of heavy load conditions. It provides a bearing that combines the advantages of magnetic bearings, static pressure gas bearings and dynamic pressure gas bearings. It has excellent steady-state and transient performance. Magnetic hybrid dynamic and static pressure bearings that have low requirements on gas supply and gas quality and are suitable for heavy load conditions

Images