Embedded self-lubricating air ring bearing and manufacturing method thereof

Abstract

The invention discloses an embedded self-lubricating air ring bearing and a manufacturing method thereof. The embedded self-lubricating air ring bearing comprises a shaft shell and a bushing, and thedifference is that a group of grooves are formed in the shaft shell, the bushing is a low-friction sliding ring body, and the shape of the outer wall of the ring body is matched with the shape of theinner wall of the shaft shell. The embedded self-lubricating air ring bearing is prepared by the following method: the shaft shell is firstly manufactured, a lubricant with polytetrafluoroethylene asa base material is used as a raw material, uniform stirring is performed, and then pressing, baking and shaping are performed to prepare the bearing. The shaft shell of the bearing is internally provided with one group of grooves, the inner side of each groove is large, the outer side of each groove is small, the shape of the outer wall of the bushing is mutually engaged with the shape of the inner wall of the shaft shell to be integrated, and the bushing is firmly connected with the shaft shell and cannot slide and fall off. According to the bearing, a steel base material is used for replacing a part of special materials with excellent anti-friction performance for the shaft shell of the bearing, so that the manufacturing cost is reduced, and the mechanical strength is improved; secondly,the bushing of the bearing adopts the low-friction sliding ring body, the friction coefficient is small, the wear amount of the bearing in use is reduced, and the service life of the bearing can be prolonged.

Description

technical field [0001] The present invention relates to a composite bearing and its manufacturing method, in particular, to a magnetic suspension or air bearing composite bearing and its manufacturing method. [0002] technical background [0003] At present, air ring bearings are widely used in various machines, automobiles, clocks, instruments, electrical appliances, especially in aluminum rolling mills and other industries. Air ring bearings have dry friction during the start-up process, and dynamic friction can only be formed when the bearing speed reaches a certain value. At the same time, there is also a dry friction state during the stop process. When the bearing speed decreases to a certain value, the air film formed disappears, and the bearing enters a dry friction state. Under the action of dry friction, the bearing speed drops. to zero. This kind of bearing makes the working surface of the bearing wear seriously under the dry friction state, and the working life i...

AI Technical Summary

Problems solved by technology

However, the contact surface between the inner surface of the shaft housing and the outer surface of the bushing of the above-mentioned bearing is a smooth cylindrical surface, and the combination of the shaft housing and the bushing is not firm enough. The sleeve and the shaft housing are easy to slide and disengage, and the service life of the bearing is short

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