The main causes of vibration of rolling bearings are essential vibration and vibration caused by bearing manufacturing error and shaft and seat hole position accuracy.
1. The essential vibration of a bearing refers to a bearing that has no shape error at all. When it is under load, its elastic contact occurs between the ferrule and the rolling element.
Unique vibrations of life. Includes:
(1), rolling elements pass vibration
(2) The natural vibration of the ferrule. Contains:
a. The angular natural vibration of the outer ring inertia moment system
b. Axial natural vibration of the outer ring mass system
c. The bending natural vibration of the bearing ring.
(3) Vibration caused by bearing spring characteristics: axial vibration, radial vibration, resonance of bearing housing, etc.
2. Vibration caused by bearing manufacturing error.
The inner and outer ring raceways of the rolling bearing and the surface of the rolling element have different wave-shaped machining marks-waviness in the circumferential direction, which is an extremely important factor causing bearing vibration, inducing noise and eccentric motion of the axis of rotation. waviness depression formed by machining marks and vibration caused, for no radial bearing clearance, or may also occur when the axial load applied to the bearing ball bearing out, among other, in addition, raceway corrugations of Bearings with a large number of waves can also occur when radial loads are applied.
3. The accuracy of the radial position of the shaft and the seat hole is poor. The accuracy of the shape of the shaft and the seat hole is poor. The ferrule will be flexed and deformed after the bearing is installed. The low frequency vibration caused by the rolling surface is caused by the wrinkle of the bearing rolling surface. The vibration is also large. And the improper operation during the installation process is also the reason that affects the bearing vibration.
Source: Luoyang Zhongyue Precision Bearing Co., Ltd.
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Label: waviness seat hole deflection deformation wave number clearance
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