Mixed type helical groove dynamical and static pressure gas composite thrust bearing

Abstract

The "hybrid spiral groove dynamic and static pressure gas composite thrust bearing" of the present invention relates to a high-speed, high rigidity, large load ultra-precision spiral groove dynamic and static pressure gas composite thrust bearing. There are herringbone dynamic pressure grooves on both sides of the air point distribution circle. Without increasing the air consumption of the air bearing, the bearing capacity is more than 30% higher than that of the traditional static pressure air bearing, and the bearing stiffness is higher than that of the traditional static pressure air bearing. The bearing is improved by more than 15%.

Description

technical field [0001] The invention relates to a dynamic and static pressure gas compound thrust bearing, in particular to an ultra-precision and ultra-high-speed gas thrust bearing. Background technique [0002] At present, the static pressure gas thrust bearings used in engineering, such as high-speed static pressure air-floating electric spindles and high-speed static pressure gas bearings for other purposes, only use static pressure air flotation to bear the load and provide stiffness, which are often used in practical applications. Encountered the problems of low load capacity, low stiffness, and poor anti-interference ability, the hydrostatic gas thrust bearings used in engineering did not make full use of the load capacity and stiffness provided by the dynamic pressure effect of high speed or linear velocity ("Mechanical Design "Handbook", Volume 2, Chapter 7 - Gas Lubricated Bearings. Fourth Edition in 2002, Chemical Industry Press. Mechanical Industry Press.). C...

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Problems solved by technology

[0002] At present, the static pressure gas thrust bearings used in engineering, such as high-speed static pressure air-floating electric spindles and high-speed static pressure gas bearings for other purposes, only use static pressure air flotation to bear the load and provide stiffness, which are often used in practical applications. Encountered the problems of low load capacity, low stiffness, and poor anti-interference ability, the hydrostatic gas thrust bearings used in engineering did not make full use of the load capacity and stiffness provided by the dynamic pressure effect of high speed or linear velocity ("Mechanical Design "Handbook", Volume 2, Chapter 7 - Gas Lubricated Bearings. Fourth Edition in 2002, Chemical Industry Press. Mechanical Industry Press.)

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