What is the cause of oil leakage in bearing box of industrial fan?

1. Labyrinth seal is used in the bearing box of fan. The labyrinth seal refers to that several ring sealing teeth are arranged successively around the fan drive shaft. There is a series of gap and swelling cavity between the teeth. When the sealed material is based on the gap of the rough riddle palace, it will cause the throttle valve effect and achieve the purpose of leakage prevention. However, due to the fact that the motor rotor of labyrinth seal is not closely connected with the shell, and the gap between the labyrinth seal and the shell is relatively large, once the two are not carefully matched, the fan bearing will leak oil.

Fan bearing box

2. Poor sealing maintenance caused oil leakage in bearing box of fan. If in the industrial fan maintenance, the box body split seal does not appear all leakage, it shows that the bearing box has not produced oil leakage. However, it must be noted that due to the labyrinth seal structure used in the bearing of the industrial fan, when it operates, the felt outside will become more and more tight due to the inseparable working pressure of the seal, thus causing the felt to be calcined, and then losing the required high efficiency, so that the bearing box can no longer be sealed well. In this way, there is no way for the oil tank of the fan to pump oil again. At this time, the grease of all fans is homeless, only according to the motor shaft of the bearing box, which makes the oil leakage of industrial fan more serious.

3. In addition to the labyrinth seal and poor maintenance, the lubrication method, the form of bearing box and the operation status of industrial fan are all harmful to the oil leakage of fan bearing box.