High-speed centrifugal fans also have bearings and matching bearing seats, which can also be divided into integral and split types. Although the type of bearing seat does not have much influence on the centrifugal fan, they all have their own Features, in order to ensure the perfect combination of centrifugal fan bearing and bearing seat, this aspect still needs to be considered.

The integral bearing box for the high-speed centrifugal fan mainly includes the upper cover, the lower seat and cast iron parts. In order to ensure the lubricity of the bearing, the bearing box is equipped with an oil level gauge and uses 32# or 46# mechanical oil. The bearings are lubricated so that they can play a better role in the centrifugal fan. The integral bearing seat can ensure the coaxiality of the front and rear bearing centers, avoiding the coaxiality error of the front and rear bearings due to poor processing and installation of the split bearing seat, resulting in shortened bearing life and even burnout The consequences of the bearing. However, if the high-speed centrifugal fan is equipped with an integral bearing housing, oil leakage is prone to occur, but after optimization and improvement of its structure, this problem has been completely solved. The main modification method is to use a labyrinth-type sealing method combined with an oil-break groove, and an oil-return groove is opened under the bearing end cover to improve the sealing performance of the bearing. The large-scale centrifugal fan uses a split bearing seat, which is generally lubricated by a thin oil pool, and is equipped with a cooling water pipe according to the design requirements. Once this type of bearing seat is poorly processed or installed, it is easy to cause the coaxiality error of the bearing and shorten the life of the bearing.

Therefore, in order to ensure the accuracy and tolerance of the high-speed centrifugal fan bearing and the bearing seat installation, it is recommended to select the bearing and the box as an integrated assembly, which can be directly used when installed on the centrifugal fan, which is very convenient.