Selection and use of bearings
Selection and use of bearings
Because of the wide range of types of bearings, the following will be mainly the use and selection of deep groove ball bearing for the most widely used as some analysis. I hope to know less of the bearing can deepen the understanding of the bearing.
One, bearing selection.
1, the choice of bearing type: bearing type is generally by the user's technical staff according to the conditions of use and bearing load on the bearing to choose. Business personnel are mainly about user's actual load whether with the selected bearing consistent, if the bearing is not up to the requirements, should advise the customer as soon as possible the election model, but unless special products in the choice of models generally do not have any questions.
The choice of 2, bearing clearance: user to buy Bearings generally only inform on what type, grade, rarely claim on the bearing clearance, the business people must ask clear bearing conditions of use, the running speed of the bearing, temperature, combined with tolerances are directly related to the shaft bearing clearance choice. General in the 3500 turn / points below the speed of the motor is used mostly cm clearance, such as high temperature and high speed motor requires a relatively large clearance. Bearing clearance after the assembly will because the inner hole of the swollen and round narrow and lead to a reduction, the clearance of reduce weight = over surplus quantity x 60% (the bearing chamber is aluminum, with the exception of). Such as bearing clearance before assembly is 0.01mm, assembly interference of 0.01mm, the clearance of 0.004mm bearing assembly. On the theory of bearing in the zero clearance noise and life to reach the best state, but in actual operation, taking into account issues such as temperature rise, bearing assembly clearance is 0.002mm-0.004mm better.
3, the choice of oil: oil selection is generally based on the speed of the bearing, temperature resistance, noise requirements and starting torque and other aspects of the selection, the requirements of the business to the performance of a variety of grease.
4, bearing seal type selection: bearing lubrication can be divided into oil and grease lubrication. Oil lubricated bearings are generally used in the form of bearings, grease lubricated bearings generally use the dust cover or rubber seal seal. Dust cover is suitable for high temperature or the use of good environment, sealing parts contact seal and non contact seal two, contact sealing and dust proof performance is good, but the power torque is large, non - contact seal starting torque is small, but the sealing performance is not good contact.
People of this bearing is currently in the automotive motor bearings, household electrical appliances, motor bearings, motor bearings, motor bearings and other professional manufacturing, so that the bearing of the noise and life to the best state.