Concentric centripetal sliding bearing formed by using interface slippage

Abstract

The invention provides a concentric centripetal sliding bearing formed by using interface slippage. The sliding bearing comprises a shaft and a bearing hole which are concentric, wherein a gap is formed between the shaft and the bearing hole, and the gap is filled with fluid to form a lubrication region; the lubrication region is divided into a sub region I and a sub region II, the static contact surface of the sub region Iis coated with a coating, so that the interface shear strength between the fluid and the coating is too low to enable the fluid to generate slippage on the surface of the coating, and fluid does not generate slippage on the rest static contact surface of the bearing and the whole movable contact surface of the bearing. The bearing disclosed by the invention has definite bearing capacity, is low in friction coefficient, is good in abrasion resistance, is high in support precision, is simple to realize, is low in cost, and has an important use value.

Description

technical field [0001] The invention relates to a concentric-to-central sliding bearing formed by interface sliding. 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, the existing...

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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