What type of oil should be added to the bearing housing of an induced draft fan?

Bearing housing: Also known as a bridge, it primarily serves as the transmission link between the motor and the fan, converting mechanical energy (electrical energy) into wind energy. In equipment with rotating shafts, the shaft is generally supported by bearings, which are installed in bearing housings filled with lubricating oil. During operation, the bearings are lubricated. Simultaneously, various forces acting on the shaft during operation are transmitted to and borne by the bearing housing, which is typically made of cast iron.

Lubricating oil mainly lubricates the bearings and bearing housing, reducing friction and achieving a cooling effect. We frequently receive questions from customers regarding adding oil to the bearing housing. Here's a unified response: If the manufacturer recommends a specific lubricating oil, purchase according to their recommendation. If not specified, refer to the following: Generally, use N32 machine oil in winter and N46 machine oil in summer (GB/T3141-1994). The amount of oil added should be based on the upper and lower oil marks on the bearing housing. That is, ensure that the oil level is between the upper and lower oil marks (Note: There is an oil level sight glass (transparent) on the bearing housing, which has upper and lower oil level markings. The amount of oil should generally be kept between the two markings). Do not blindly pursue more oil, as too much oil will cause the bearing housing to leak.