The permissible temperature range of motor bearings refers to the maximum and minimum temperature ranges allowed by motor bearings under normal operating conditions. This is a very important parameter, which is directly related to the performance and life of the motor. Therefore, it is of great Significance to understand and master the allowable range of motor bearing temperature for the design, manufacture, maintenance and repair of motors.

First, let's understand why motor bearing temperature should be controlled. The motor bearing is one of the important parts in the motor. It is responsible for supporting the rotation of the motor rotor and bearing certain axial and radial loads. Bearings generate heat during operation, and under normal operating conditions, the temperature of the bearings will gradually increase. If the bearing temperature is too high, the lubricating oil will fail, and the oil film will no longer effectively protect the bearing surface, which will aggravate wear and corrosion, and accelerate the aging and damage of the bearing. At the same time, high temperature will also damage the electronic components inside the motor, thus affecting the stability and reliability of the motor. On the other hand, when the bearing temperature is lower than the allowable range, it will also cause damage to the motor. Low temperature will make the lubricating oil become viscous and difficult to flow, thereby reducing the lubrication effect and increasing the friction and wear of the bearing surface. In addition, low temperatures can make the components inside the motor brittle and prone to fracture or damage. Therefore, in order to maintain the performance and life of the motor, the temperature of the motor bearing must be controlled within the allowable range.

So, what is the allowable range of motor bearing temperature? According to industry standards, in general, the temperature of motor bearings should be controlled between 60°C and 85°C. Among them, 60°C represents the lowest temperature of the bearing, and 85°C represents the highest temperature of the bearing. This range is based on a large number of experiments and experiences, and can meet the requirements of most motors. However, it should be noted that this range should also be adjusted according to specific application scenarios. For example, for a motor used in a high-humidity environment, the upper limit of the bearing temperature should be lower than the standard value. In some special application scenarios, such as motors that need to run for a long time, it is recommended to lower the bearing temperature appropriately to prolong the service life of the motor.

However, how to control the temperature of the motor bearings? First of all, we need to make sure that the cooling system of the motor is good, and there is enough ventilation and air circulation. The design and maintenance of the motor cooling system are critical to the stability and reliability of the motor operation. Secondly, we can also improve the bearing capacity and high temperature resistance of the bearing by adopting more advanced bearing materials and lubricating oil, so as to ensure the stability and life of the bearing. The selection of bearing material and lubricating oil should be reasonably selected according to the service conditions and requirements of the motor.

To sum up, it is of great significance to master the allowable temperature range of motor bearings for the design, manufacture, maintenance and repair of motors. The running stability and life of the motor are closely related to the control of the bearing temperature. Therefore, enterprises should formulate corresponding standards and specifications, regularly monitor and maintain the bearing temperature of the motor, and ensure the normal operation of the cooling system of the motor and regular replacement of lubricating oil. Only in this way can the reliability and long-term stable operation of the motor be guaranteed.