The motor bearing is an important part in the motor, the size of its radial clearance directly affects the running accuracy, vibration and life of the motor. In order to ensure the normal operation of the motor, it is necessary to measure and adjust the radial clearance of the motor bearing. This paper introduces the method of measuring and adjusting radial clearance of motor bearing, and discusses its influence on motor performance.
The radial clearance of motor bearings can be measured by:
Measuring with a dial gauge: Fix the dial gauge on the bearing seat, make the dial contact with the bearing outer ring, and then rotate the bearing inner ring by hand to observe the change of the dial, that is, the radial clearance of the bearing.
Use a feeler gauge to measure: insert the feeler gauge into the gap between the inner ring and the outer ring of the bearing, push the feeler gauge tightly, and then pull out the feeler gauge to measure the thickness of the feeler gauge, that is, the radial clearance of the bearing.
It should be noted that the appropriate measurement tools and methods need to be selected during measurement, and the correct measurement is carried out according to the type and specification of the bearing.
The radial clearance of motor bearing has a direct effect on the performance of motor. If the radial clearance is too large, it will cause the vibration and noise of the bearing to increase, affecting the running accuracy and service life of the motor; If the radial clearance is too small, it will cause the bearing to heat, wear faster, and even lead to the bearing lock. Therefore, it is necessary to adjust the radial clearance of the bearing according to the measurement results.
The radial clearance of the motor bearing can be adjusted in the following ways:
Use adjustment gaskets: Add adjustment gaskets between the bearing seat and the bearing, and adjust the radial clearance of the bearing by increasing or decreasing the number of gaskets.
Use adjustment screw: Set adjustment screw on the bearing seat, rotate the adjustment screw to change the position of the bearing seat, so as to adjust the radial clearance of the bearing.
Using the thermal expansion and cold contraction method: using the thermal expansion and cold contraction characteristics of the metal, the bearing is heated and installed in the bearing seat, waiting for its natural cooling, the radial clearance of the bearing will be reduced. It should be noted that the temperature and time should be controlled when heating to avoid damage to the bearing.
After the adjustment is completed, the radial clearance of the bearing needs to be measured again to ensure that it meets the requirements.
When measuring and adjusting the radial clearance of motor bearings, the following matters need to be noted:
Ensure measuring tools and methods are correct and reliable to avoid errors.
The adjustment needs to be carried out gradually to avoid bearing damage caused by excessive one-time adjustment.
After the adjustment is completed, review is required to ensure that the adjustment results meet the requirements.
Pay attention to safety during operation to avoid damage to personnel and equipment.
This paper introduces the method and significance of measuring and adjusting radial clearance of motor bearing. The correct measurement and adjustment can ensure the normal operation of the motor and extend the service life of the motor. It is important to note that the relevant regulations and safety requirements must be strictly observed when performing operations to avoid damage to personnel and equipment.
