Bearing

A bearing is a mechanical element used to support a rotating shaft and is widely used in mechanical equipment. It can reduce the coefficient of friction, reduce energy loss and prolong the service life of equipment. This article will introduce the basic principle, classification, working principle and common problems of bearings.

First of all, the basic principle of the bearing is to use rolling elements to roll between the inner ring and the outer ring, thereby reducing the friction coefficient and reducing energy loss. The common rolling elements are balls, rollers and needles. Through the contact between the inner and outer rings, the rolling elements convert the rotational torque into rolling force, thereby realizing the rotation of the shaft.

Bearings can be divided into deep groove ball bearings, angular contact ball bearings, cylindrical roller bearings and spherical roller bearings according to their structure. Deep groove ball bearings are suitable for occasions bearing large radial forces, angular contact ball bearings are suitable for occasions bearing large axial forces, and cylindrical roller bearings are suitable for occasions bearing large axial and radial forces. Spherical roller bearings are suitable for occasions that bear large eccentric and tilting forces.

The working principle of the bearing is to reduce the friction between the rolling elements and the inner and outer rings through the lubricant, and at the same time reduce the working temperature of the bearing. Lubricants generally come in the form of greases and oils. The selection of lubricant should be reasonably selected according to the working conditions, speed, load and other factors of the bearing to ensure the normal operation of the bearing.

In practical applications, bearings often face some common problems, such as bearing wear, bearing overheating, bearing life is too low, etc. Bearing wear is mainly caused by improper use, lubricant aging or contamination. Bearing overheating can be caused by poor lubrication, excessive load or bearing damage. Low bearing life may be caused by unqualified material quality, unreasonable working conditions or excessive loads.

In order to ensure the normal operation of the bearing, regular maintenance must be carried out. Maintenance mainly includes cleaning, lubrication, and installation of sealing devices. Cleaning requires cleaning agents to remove dirt and lubricant residues from the bearing surface. When lubricating, choose the appropriate lubricant according to the working conditions, and replace and replenish it regularly. Adding a sealing device can prevent external impurities from entering the bearing and improve the service life of the bearing.

In short, bearings are an indispensable and important part of mechanical equipment, and their working principles and classification are very important for us to understand the basic knowledge of bearings. Only by correctly selecting and maintaining bearings can the normal operation of mechanical equipment be guaranteed and the service life of equipment can be extended.