Internal groove self-lubricating dynamic-static pressure coupling air-float bearing

Abstract

The invention discloses a coupling dynamic-static air bearing with a self-lubricating function of an internal channel, and relates to bearing technologies, and is an air bearing of new structural form. The bearing is structurally characterized in that a bearing body is provided with double-row pressure air supply holes, and a throttle nozzle tangential air supply structure is adopted; inner surface of the bearing is provided with a pressure channel groove structure; the bearing body is made of wear resistant and high temperature resistant materials with self-lubricating property, and technical measures for vibration reduction such as rubber band, metal rubber and elastic composite materials are taken. The coupling dynamic-static air bearing greatly increases the capacity of a floating ring for bearing imposed load and the wear resistant property of static components and dynamic components which contact in a short time, and also reduces the requirements for indexes such as working substances, impurities, temperature and the like. Therefore, the bearing is characterized by simple structure, stable operation and high reliability, and further broadens the technical application range of air bearing products.

Description

technical field [0001] The invention relates to bearing technology, which is an inner channel self-lubricating dynamic and static pressure coupling air bearing of a high-speed rotating machine air bearing. Background technique [0002] Air bearing is a high-tech product developed rapidly in the middle of the 20th century. Compared with conventional oily lubricated bearings (rolling bearings or oily sliding bearings), it has many good characteristics, such as high speed, high precision, and low power. It has the advantages of low energy consumption, no pollution, long life, and strong environmental adaptability. Therefore, it is widely used in national defense, energy, machine tools and medical industries, especially in the fields of high-speed rotary machinery and ultra-precision instrument technology. [0003] At present, there are mainly two basic structural forms for the lubrication of air bearings, one is hydrostatic air bearings such as figure 1 , the other is a dynam...

AI Technical Summary

Problems solved by technology

However, due to the structural characteristics of these two types of air bearings, there are deficiencies such as high wear resistance requirements for short-term contact surfaces of moving and static parts, and material and process performances that are not easy to achieve, and are prone to whirl instability and damage to the bearing.

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