The selection and application of motor bearing

With the country's growing development of mechanical engineering, composite bearings bearing industry demand for more and more, and in the machinery industry, the use of bearings has been widely used, because, bearing development growing varieties are increasing , and how to choose the mechanical bearings are used, we have to understand.

Bearing selection

1, bearing type selection: slide bearing type is generally user-bearing member of the art according to the conditions of use and accessory products bear the load on the bearing selection. The main business personnel to understand whether the actual user load bearing selected consistent, if not reach the bearing requirements, the customer should be advised as soon as the election model, but unless special products in the choice of models is generally not a problem.

2, the bearing clearance selection: when purchasing bearings are generally only informed what type, class, rarely have the bearing clearance request, the business must ask clear bearing conditions, wherein the bearing speed, temperature , tolerances are directly related to the bearing clearance selection. Usually 3500 rev / min rotational speed of the motor they use CM clearance, such as high temperature and high motor requires a relatively large clearance.

Bearing clearance after assembly because of swollen and bore cylindrical reduced and the reduction, reducing the amount of clearance = interference × 60% (excluding the bearing housing is aluminum). For example, the bearing assembly before clearance is 0.01mm, assembly interference of 0.01mm, the bearing clearance after assembly is 0.004mm. In theory at zero clearance bearing noise and life are to achieve the best state, but in actual operation, taking into account issues such as temperature, bearing clearance after assembly is 0.002mm-0.004mm better.

3, the bearing seal type selection: bearing lubrication can be divided into oil and grease lubrication. Oil-lubricated bearings are generally used form of bearings, grease lubricated bearings generally used shields or rubber seals seal. Dust cover for high temperature environment or good parts, seals and sub-contact seal two non-contact seal, contact seal dustproof performance is good but starting torque, non-contact seal starting torque is small, but sealing performance no contact is good.

4, oil selection: fat choices are generally selected based on bearing speed, temperature, the starting torque and noise requirements, etc., requires business people to know much about the performance of various oils.

Daily matter of course in the process of re-use bearings have major bearing, to understand the use of these bearings is probably also mastered almost every aspect of the bearing only have to understand, so as to make better use of bearing efficiency, and the ability to extend bearing life.