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What are the vibration types of Bearings?

wallpapers Industry 2020-11-12
Bearings are an important part of mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. In production and processing, once fake and inferior bearings are used, the consequences will not only lead to machine maintenance and even shutdown, but also cause millions of losses, and even cause casualties.
Rolling bearing vibration can be divided into three types according to the vibration direction:
Radial vibration Vibration in the radial plane of the bearing ring.
Axial vibration Vibration along the axis of the bearing.
Angular vibration The oscillation of the radial plane of the ring relative to the diameter.
Rolling bearing vibration can be divided into the following three types according to the generation mechanism:

1. Natural vibration of bearing structure

(1) Regard the outer ring as a natural vibration caused by an elastic body.
(2) The outer ring is regarded as the natural vibration caused by the steel body.
(3) The steel ball is regarded as the natural vibration of the steel body.

2. Forced vibration

(1) Rolling elements pass through vibration Vibration caused by rolling elements periodically passing through the load line of action when the bearing is running.
(2) Vibration caused by manufacturing errors of bearing parts.

3. Shock and vibration

When there are defects such as scratches, burrs, rust spots, pitting, peeling pits and dust on the surface of the raceway of the ring or the surface of the rolling elements, the bearing will excite pulse-shaped vibration. The pulse period is inversely proportional to the speed, and the amplitude is related to the size of the defect.

The vibration of rolling bearings is often the result of the above-mentioned various vibrations. A large number of experimental studies have shown that, under normal conditions of bearing operation, the surface waviness of bearing parts is the main factor causing bearing vibration.

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