Electromagnetically enabled active hydrodynamic gas-lubricated bearing

Abstract

The invention provides an electromagnetically enabled active hydrodynamic gas-lubricated bearing. The electromagnetically enabled active hydrodynamic gas-lubricated bearing comprises an electromagnetic bearing (1) and an elastic foil bearing (3) nested between the electromagnetic bearing (1) and a rotor shaft (2), and is characterized in that the elastic foil bearing (3) comprises elastic top foil (31) and elastic bottom foil (32), the elastic top foil (31) is a non-magnetic material, and a plurality of mutually independent magnetic material areas are distributed on the surface of the elastic top foil (31). The electromagnetically enabled active hydrodynamic gas-lubricated bearing is simple in structure, has low requirement for precision, adopts a gas-magnetism mixed bearing structure, is provided with the adjustable magnetic flat foil and low-cost pressure sensors, and solves the problem that lubrication airflow leaks and is difficult to control due to low low-speed bearing capacity and bearing disturbance eccentricity during work of the conventional hydrodynamic gas-lubricated bearing.

Description

technical field [0001] The invention belongs to the technical field of high-speed oil-free lubricating support equipment, and in particular relates to an electromagnetically enabled active dynamic pressure gas bearing. Background technique [0002] Electromagnetic bearing is a kind of bearing that uses electromagnetic force to make the rotor stably levitate and its axis position can be controlled by the control system. It can also be called electromagnetic bearing or magnetic suspension bearing. The most commonly used type in the prior art is active magnetic suspension bearing ( AMB). Electromagnetic bearings use magnetic force to suspend the rotating shaft at a specific position in space, realizing the function of traditional bearings. It avoids direct contact between the rotor and the bearing, and does not require lubrication and sealing. It can completely eliminate wear and reduce power consumption; it has controllable The position of the rotor can be actively controlled...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide an electromagnetically enabled active dynamic pressure gas bearing, which has a simple structure and low precision requirements, adopts a gas-magnetic hybrid bearing structure, has an adjustable magnetic flat foil and a low-cost pressure sensor , which solves the problem that the existing dynamic pressure gas bearing has low low-speed bearing capacity, bearing disturbance and eccentricity, which makes the lubricating air flow leak and is difficult to control.

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