The structure and function of bearings

The basic structure of the bearing is composed of four parts: inner ring, outer ring, rolling element (steel ball or roller) and cage.

1. Inner ring (also called inner sleeve or inner ring): usually fixed on the shaft neck, the inner ring rotates with the shaft. There are grooves on the outer surface of the inner ring for the steel ball or roller to roll, called inner groove or inner raceway.

2. Outer ring (also called outer sleeve or outer ring): usually fixed on the bearing seat or the housing of the machine, and plays the role of supporting the rolling element. There are also grooves on the inner surface of the outer ring for the steel ball or roller to roll, called inner groove or inner raceway.

3. Rolling element (steel ball or roller): Each set of bearings is equipped with one or several groups of rolling elements, which are installed between the inner ring and the outer ring to play the role of rolling and transmitting force. Rolling elements are load-bearing parts, and their shape, size and number determine the bearing's ability to bear loads and high-speed operation performance.

4. Cage (also called retainer or isolator): evenly separate the rolling elements in the bearing from each other, so that each rolling element rolls normally between the inner ring and the outer ring.

The function of bearings

1. The main function of bearings is to support mechanical rotating bodies, reduce their friction coefficient during movement, and ensure their rotation accuracy. At the same time, bearings are also components that fix and reduce the load friction coefficient during mechanical transmission.

2. Reduce friction and make rotation smoother

The role of bearings is to reduce friction and make rotation smoother. The rotating "axis" and the rotating support part will definitely have friction, and bearings can reduce friction, make rotation smoother, and reduce energy consumption. This is the biggest role of bearings. Bearings play a supporting role between the rotating "axis" and the rotating support part, reducing the friction generated during rotation, thereby reducing energy consumption. Therefore, bearings play an important role in industrial production, which can improve work efficiency and reduce production costs.

3 The role of bearings is to protect the rotating support part from the force of rotation and ensure the normal operation of the machine.

4. Bear radial loads

Deep groove ball bearings are a type of bearing with a continuous groove raceway and one-third of the spherical surface of the equatorial circumference. It is mainly used to bear radial loads and can also bear certain axial loads. When the radial clearance of the bearing increases, it has the characteristics of an angular contact ball bearing and can withstand bidirectional alternating axial loads. Compared with other types of bearings of the same size, this type of bearing has a small friction coefficient, high limit speed, and high precision, and is the preferred bearing type by users. The main uses of deep groove ball bearings include automobiles, tractors, machine tools, motors, water pumps, agricultural machinery, textile machinery, etc.

5. Temperature and noise control

The function of the bearing is to control temperature and noise. When the bearing is running, friction and heat will be generated, but in order to evenly distribute the rolling elements, this heat needs to be kept at a minimum level to reduce noise. This is the principle of temperature and noise control of the bearing. By controlling temperature and noise, the bearing can maintain a stable operating state and improve the service life and performance of the bearing.

6. Guiding effect

One of the functions of the bearing is the guiding effect. In the unloaded area, guiding the rolling elements can improve the rolling conditions in the bearing and prevent damaging sliding. This is because the bearing rubs or collides with the ground or equipment surface during operation, generating friction, thereby reducing the wear of the bearing by friction. Through the guiding effect, the bearing can maintain a stable operating state and improve the service life of the bearing.