Concentric micro centering slide bearing formed by physical absorption

Abstract

The invention provides a concentric micro centering slide bearing formed by physical absorption. The bearing comprises a shaft and a bearing hole concentrically arranged, wherein a nanometer-magnitude gap is formed between the shaft and the bearing hole; a fluid is fully filled in the gap to form a lubrication area; the lubrication area is divided into two areas of a subarea I and a subarea II; and coating layers are respectively coated on static contact surfaces of the subarea I and the subarea II, so that the interaction strength of the fluid in the subarea I and the static contact surface is greater than the interaction strength of the fluid in the subarea II and the static contact surface. The bearing has the advantages of a certain bearing capacity, low frictional coefficient, excellent wear resistance, high support precision, simple realization, low cost and important practical value.

Description

technical field [0001] The invention relates to a concentric miniature centripetal sliding bearing formed by physical adsorption. Background technique [0002] Bearings are important mechanical components used to support shaft parts, and are divided into sliding bearings and rolling bearings. There are the following main performance requirements for bearings: support accuracy, support rigidity, low friction coefficient and wear resistance. This requires the bearing to be a very precise mechanical part, and also requires it to have a large enough load-carrying capacity. In order to achieve good anti-friction and wear resistance, the bearing also needs to have good lubrication performance. So far, although the bearing technology is relatively mature, it is all based on the traditional lubrication theory. At present, rolling bearings and sliding bearings are used in different occasions and each has its own advantages. Since the present invention relates to sliding bearings,...

AI Technical Summary

Problems solved by technology

According to the traditional fluid lubrication theory, Figure 1~Figure 3 If the radial sliding bearing shown has load capacity, there must be an offset e between the shaft center and the hole center in the bearing, such as Figure 1~Figure 3 As shown, the existence of the offset e reduces the concentricity of the shaft and the hole in the bearing, and reduces the bearing support accuracy, and the greater the bearing load or the lower the rotation speed, the greater the offset e, the lower the bearing support accuracy, and the bearing lubrication The lower the oil film thickness, the less lubricated the bearing

That is, in such Figure 1~Figure 3 When the center of the radial sliding bearing and the center of the hole are concentric, that is, when e=0, according to the traditional fluid lubrication theory, the radial sliding bearing does not have load-carrying capacity at this time, and the bearing support rigidity is low

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