How to use rolling bearings

Through a large number of rolling bearing failure analysis studies, the bearing short-life or premature loss of precision, due to material defects or improper manufacturing, but to a considerable extent is not strictly in accordance with the requirements of bearing installation, maintenance, or Abnormal bearing damage caused by improper bearing selection or actual load exceeding the rated load of the bearing itself

For example, fatigue spalling of bearing parts is largely due to impurities in the lubricating oil. It can be seen that in order to achieve a longer life and accuracy retention of rolling bearings, in addition to requiring bearing manufacturers to improve product quality, bearing users must also use bearings with scientific methods and procedures. Otherwise, even better bearings will be inferior. Aborted under random use conditions.

The rolling bearing is a kind of precision mechanical supporting component. The bearing user deeply hopes that the bearing mounted on the main machine can not damage and maintain its dynamic performance within the predetermined service period, but the objective fact is sometimes not satisfactory, sudden bearing failure accident. Will cause significant losses to users.

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What aspects should be considered when choosing a bearing clearance?

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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