Motor Bearings Selection and Application

Countries, along with the development of the mechanical expanding of composite bearing bearing industry needs more and more, and in the machinery industry, the use of the bearing has been widely used, because, growing bearing development, increase of varieties, and the use of machinery in how to choose the bearing, we must know something about.

The selection of the bearing

1, bearing type selection, bearing type is generally by the user's technical people sliding bearing member according to the product of form a complete set of conditions of use and the load bearing for selection.Business people mainly learn the user's actual load is consistent with the selected bearing, if bearing can not meet the use requirements, should suggest customer re-election model as soon as possible, but unless special products on the choice models generally do not have what problem.

2, the selection of the bearing clearance: user when buying bearings generally just let us know in what type, grade, rarely on bearing clearance request, business people must ask bearing conditions of use, which the bearing rotating speed, temperature and tolerance are directly related to the selection of the bearing clearance.Generally under 3500 RPM speed motor mostly adopts CM clearance, such as high temperature and high speed motor, require the use of relatively large clearance.

Bearing clearance after assembly will rise because of the inner hole and cylindrical reduction and lead to reduce, the reduction of clearance = interference quantity x 60% (except the bearing chamber is aluminum).Bearing clearance before assembly is 0.01 mm, for example, when the assembly interference quantity is 0.01 mm, the bearing assembly after the clearance is 0.004 mm.In theory at zero clearance noise and bearing life can reach the best state, but in actual operation considering the problems such as temperature, bearing clearance after assembly is 0.002 mm to 0.004 mm is better.

3, the choice of bearing seal type: the bearing lubrication can be divided into oil lubrication and grease lubrication.Oil lubricated bearing is generally choose form of bearing, grease lubricated bearing dust cover is generally selected or rubber seal seal.Dust cover suitable for high temperature or the use of good parts, seal two points contact seal and non-contact seal and contact seal dustproof performance is good but the starting torque, the sealing type starting torque is small, but there is no contact sealing performance is good.

4, the choice of grease: the choice of grease are generally according to the requirements of the bearing rotating speed, heat resistance, noise and choose starting torque, etc, required business people to know a lot about the performance of all kinds of grease.

Reuse in the process of the bearing will, of course, the main bearing everyday matters, to understand the use of bearing probably learned about, only learned to bearing each link, so you can better use the bearing efficiency, and can prolong the service life of bearing.