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Clearance and preload of bearing

2018-08-28

Clearance and Preload of Bearing

1.Bbearing Clearance

Bearing Tour (bearing the initial clearance) sometimes referred to in the bearing clearance, is not installed, will either the inner or outer ring to be fixed, is not fixed on one side of the ring in no load condition, the radial or axial movement of the displacement, is bearing clearance; according to the movement direction respectively. Called radial clearance or axial clearance.

2. b

Bearing Clearance Choice

Bearing in the running state of the clearance (running clearance), because of the co-ordination and the inner ring and the outer ring temperature difference, generally smaller than the initial bearing clearance. The running clearance affects bearing life, heating, vibration, or noise, and must be the best choice.

3. p

Preload of Bearings

The bearing can endure the elastic compression force at the contact point between the rolling body and the raceway surface by pre load, so that the clearance will not occur during load, and the radial and axial displacement of the roller can improve the rigidity. Therefore, to improve the natural frequency of shaft and suitable for high-speed rotation, can reduce shaft deflection, improve turning precision and accuracy, and to suppress the vibration and noise, but also can control the revolution, sliding and rotating sliding sliding Autobiography of rolling body and reduce the emergence of a bite (Smearing) etc.. The general way to preload a bearing is to apply axial load between the two relative bearings. Make the inner and outer ring of the bearing produce relative axial displacement. Usually divided into pre load and constant pressure preload.