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How to make the bearing clearance very small, but does not affect the speed?
作者:    发布于:2020-01-02 16:55:56    文字:【】【】【】浏览 (2267)
摘要:The clearance of rolling bearing is generally divided into original clearance, installation clearance and use clearance. The original clearance, also known as manufacturing clearance, is produced by the bearing manufacturer according to the requirements of national or industrial standards and different bearing types. The bearing clearance finally selected by the mechanism designer is also this clearance.

The clearance of rolling bearing is generally divided into original clearance, installation clearance and use clearance. The original clearance, also known as manufacturing clearance, is produced by the bearing manufacturer according to the requirements of national or industrial standards and different bearing types. The bearing clearance finally selected by the mechanism designer is also this clearance.

In the process of bearing installation, since the inner ring and shaft, outer ring and bearing hole are installed with different degrees of interference, the clearance after bearing installation will change according to the size of shaft and hole interference during installation. When installing, the amount of interference is large, the clearance after bearing installation will be small, the amount of interference during installation is small, and the change of clearance after bearing installation is relatively small, or it can be said that there is no change Change. In case of angular contact bearing, pre interference installation can be adopted during installation. After installation, the bearing has no clearance or negative clearance. Pre interference installation can improve the rigidity of the bearing and the rotation accuracy of the mechanism.

In the process of using the bearing, because of the heat generated by friction, the clearance in use of the bearing will be smaller than that after installation, so the original clearance of the bearing must be larger than that in use. Of course, to make the radial clearance of the bearing smaller, you can choose the original clearance of the bearing as a small clearance group, such as 1 group and 2 groups of clearance; or increase the interference between the bearing and the shaft and the hole (too large interference will make the bearing installation difficult, or the bearing ring may crack). The rotational speed of the bearing is determined by the type, structure, accuracy and lubrication mode of the bearing, which has little to do with the clearance of the bearing.

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