What are the effects of different mounting methods on motor bearing temperature?

B35 Mounting motors -Heat dissipation control requirements for bearing systems

Compared with B3 installed motor, B35 motor in addition to the installation and fixing of the base foot, but also through the flange end cover and equipment fixed, that is, in both horizontal and vertical directions to ensure and restrict the motor shaft extension and equipment docking effect. Naturally, the flange cover of the motor and the equipment butt to form a relatively independent cavity, the shaft extension end of the motor bearing part more than a block with the external environment, that is, the heat emitted by the bearing system can not directly exchange heat with the surrounding environment, especially for the equipment part of the high temperature occasions, the impact on the motor shaft extension bearing temperature is greater.

However, in the process of motor test, in most cases, the test environment will not be created according to the actual operation of the motor, whether it is the installation environment or the actual operation environment of the motor, so the data measured in the test stage has a large deviation from the actual operation process of the motor, especially for the place with high ambient temperature, resulting in a lot of bearing system problems.

B35 Installation motor – non-stop oil injection and discharge structure

For most motors, the bearing system needs non-stop oil injection and discharge structure, and the motor oil injection and discharge structure has two types, one is on the bearing cover, and the other is on the end cover. For the motor installed by B3, whether on the end cover or on the bearing cover, oil injection and discharge can be completed as long as it does not interfere with the equipment, while for the motor installed by B35, oil injection and discharge can be completed. It is necessary to consider the rationality of the injection and discharge structure after the motor is connected with the equipment.

In the actual motor fault safety analysis, it was found that some motors only have oil injection holes and no oil discharge holes, which is not a big problem for small motors, but for larger motors, especially those requiring frequent replacement of grease, the problem may be more serious, and the grease may even flow into the motor cavity, causing other quality problems.