Scaling structure type line dynamic and static pressure air bearing

Abstract

Scaling structure profile hydrodynamic air bearing. The traditional air bearing adopts a simple rectangular inner channel, and the profile of the channel cannot exert the best effect of dynamic pressure, which will lead to the problem of insufficient load at low speed and aerodynamic instability at high speed. The composition of the present invention includes: a bearing body (2), the inner surface of the bearing body has a dynamic pressure structure, and the dynamic pressure structure is a scaling linear pressurized channel groove (3), and the bearing body has a static Pressure structure, the static pressure structure includes an air supply hole (4), the air supply hole communicates with the throttle nozzle (5), and the elastic ring (6) is installed on the bearing body. The invention is used to support high-speed rotating machinery.

Description

Technical field: [0001] The invention relates to a dynamic and static pressure air bearing with a scaling structure profile. Background technique: [0002] Gas lubricated bearing technology is a high-tech developed rapidly in the middle of the 20th century. It uses the viscosity of the gas to increase the pressure of the gas in the gap to support the object. Air bearings have the advantages of "lightweight, clean, smooth operation, strong environmental adaptability, and wide temperature adaptability", so they are widely used in industries such as national defense, energy, machine tools, and medical care, especially in high-speed rotary machinery and ultra-precision instrument technology field has obvious advantages. [0003] According to the principle of pressure generation, air bearings can be divided into static pressure type and dynamic pressure type. The static pressure type bearing is to input the pressurized gas from the outside, enter the bearing through the restric...

AI Technical Summary

Problems solved by technology

[0004]The main problem of conventional dynamic and static pressure hybrid air bearings is: the air supply nozzle of the static pressure system is located in the booster channel groove of the dynamic pressure system, when the static pressure When the air supply of the system is uneven or the rotor vibrates, the flow field formed by the air coming in from the air supply nozzle is prone to disturbance, and the support stiffness at both ends of the bearing is no longer equal, resulting in high-speed rotating machinery vibration or serious instability and shutdown; the traditional simple Rectangular inner channel, the shape of the channel cannot exert the best effect of dynamic pressure, which will lead to insufficient load at low speed and aerodynamic instability at high speed