The Difference Between Rolling Bearings And Sliding Bearings Is The —— Definition And Its Advantages And Disadvantages

Rolling bearing refers to the friction between the shaft running mechanically and the shaft seat is the bearing of rolling friction, but the sliding bearing is still working under the sliding friction. The rolling bearing structure is clear, and the evenly distributed rolling body can effectively reduce the friction, so the mechanical start is very fast and good, and the maintenance is relatively simple and convenient. In addition, it is more suitable for working at medium speed, high speed working noise is larger, and will reduce its service life. In addition, the rolling bearing working vibration. Comparatively speaking, the sliding bearing runs smoothly and has no noise, but the starting resistance is relatively large.

Rolling bearings and sliding bearings distinguish between the —— structure

The rolling bearing is composed of the inner ring, outer ring, rolling body and holder, in which the outer ring is fixed as a support; the inner ring rotates with the shaft; the rolling body is the most important, related to the performance and service life of the bearing; the holder is auxiliary rolling body. Sliding bearing does not have the above structure, which plays a key role in the production material of sliding bearing.

In addition, the main function of bearings is to reduce the friction force, in which, the size of the friction force of rolling bearings is related to the manufacturing process level, that is, whether it is accurate. However, the friction force of sliding bearings is related to its manufacturing materials. Usually, metal sliding bearings and non-metal sliding bearings (mostly plastic) are discussed.

Although the rolling bearings and the sliding bearings are both mechanical parts, their operation is not the same. In addition, in the process of mechanical use, but also pay attention to the daily maintenance and repair of rolling bearings and sliding bearings. If you want to in-depth research, Cheng County Chengzhou boiler xiaobian suggested that you observe these two kinds of bearings face to face.

According to the friction properties, different bearings can be divided into rolling (friction) bearings and sliding (friction) bearings. It is obvious that rolling bearing must have less friction resistance, fast start and higher efficiency than sliding bearing, which is the advantage of rolling bearing.

Compared with sliding bearings, rolling bearings have large radial size, poor shock absorption capacity, low life and loud sound at high speed. That's its drawback.The shape of the rolling body is not limited to the ball, but also to the cylindrical rollers, cone ones, femoral rollers, and the right rolling needle shown above.

According to the different rolling body, the rolling bearings are divided into ball bearings and roller bearings. When other conditions are the same, the roller bearing operation is flexible, suitable for high speed, but the bearing capacity is relatively low; the roller bearing operation is not as flexible as the ball bearing, but with high bearing capacity and strong impact resistance.

The most basic structure of sliding bearing is divided into bearing bush and shaft journal.

This is the essential difference between sliding friction and rolling friction (one is point contact and one is surface contact), which has essential advantages and disadvantages.

Advantages:

1, high bearing capacity; (the reason of large contact area)

2, simple structure, convenient manufacturing, processing and disassembly;

3, good impact resistance and good vibration absorption performance, smooth operation, high rotation accuracy.

Disadvantages:

1, complex maintenance, high requirements for lubrication conditions;

2, boundary lubrication bearing, large friction wear.(This is also a disadvantage of the large contact area.)

To sum up, the use of sliding bearings is: high speed, high precision, heavy load, and is the existence of low speed impact in the machine. In addition, most occasions are widely used rolling bearings.