When choosing a bearing clearance, the following aspects should be considered:
1, the working conditions of the bearing, such as load, temperature, speed, etc.;
2. Requirements for bearing performance (rotational accuracy, friction torque, vibration, noise);
3. When the bearing and the shaft and the housing hole are in an interference fit, the bearing clearance is reduced;
4. When the bearing is working, the temperature difference of the inner jacket ring causes the bearing clearance to decrease;
5. The bearing clearance is reduced or increased due to the different expansion coefficients of the shaft and the outer casing material.
6, according to the experience of use, the most suitable working clearance of the ball bearing is close to zero; roller bearings should maintain a small amount of working clearance. In components requiring good bearing rigidity, the bearings allow a certain amount of preload. It is specifically pointed out here that the so-called working clearance refers to the clearance of the bearing under actual operating conditions. There is also a kind of play called the original play, which refers to the play before the bearing is not installed. The original clearance is larger than the installation clearance. Our choice of clearance is mainly to choose the right working clearance. Valve inlet pump
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