What is the difference in structure and function between thrust bearings and radial bearings and traditional ball bearings and plain bearings?

Thrust bearings can withstand axial loads

Radial bearings can withstand radial loads

The above two are the two main types of bearings according to the direction of force.

The following slide bearings and rolling bearings.

Sliding bearings: sliding bearings are not divided into inner and outer rings and no rolling body, generally made of wear-resistant materials. Commonly used in low speed, heavy load and lubrication and maintenance of difficult mechanical rotation parts.

Rolling bearings: its working principle is to rolling friction instead of sliding friction, generally consists of two rings, a group of rolling body and a cage is composed of.

Speaking of rolling bearings and plain bearings difference

Rolling bearings and plain bearings, compared with the following advantages:

1. Rolling bearing coefficient of friction than the sliding bearing small, high transmission efficiency. General sliding bearing friction coefficient of 0.08-0.12, and rolling bearing friction coefficient is only 0.001-0.005;

2. Rolling bearing has been realized standardization, serialization, generalization, suitable for mass production and supply, use and maintenance is very convenient;

3. Rolling bearing with bearing steel manufacturing, and after heat treatment, so, rolling bearing Not only has high mechanical properties and long service life, and can save the manufacture of plain bearings used in the more expensive non-ferrous metals;

4. Rolling bearing internal clearance is very small, the machining of the parts of the higher precision, therefore, the operation of the higher precision. At the same time, the bearing can be pre-loaded method to increase the rigidity of the bearing. This is very important for precision machinery;

5. Some rolling bearings can bear radial load and axial load at the same time, therefore, can simplify the structure of the bearing support;

6. Due to the high transmission efficiency of rolling bearings, heat generation is less, therefore, it can reduce the consumption of lubricating oil, lubrication and maintenance of the more trouble;

7. Rolling bearings can be conveniently applied to the space in any direction on the uranium. Space in any direction on the uranium.

However, all things are divided into two, rolling bearings also have certain shortcomings, mainly:

1. Rolling bearing capacity to withstand loads than the same volume of the sliding bearing is much smaller, therefore, the radial dimensions of the rolling bearing is large. Therefore, in the occasion of bearing large loads and the requirements of small radial dimensions, the structure requires compact occasions (such as internal combustion engine crankshaft bearings), more than the use of plain bearings;

2. Rolling bearing vibration and noise, especially in the use of the latter part of the year, especially significant, therefore, for the precision of the requirements of the very high, but also not allowed to have the vibration of the occasions, the rolling bearing is difficult to win, generally choose the sliding bearings of the effect is better

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3. Rolling bearings are particularly sensitive to metal chips and other foreign matter, bearing once into the foreign matter, will produce intermittent larger vibration and noise, will also cause early damage. In addition, rolling bearings are also susceptible to early damage due to metal inclusions. Even if the early damage does not occur, rolling bearing life also has a certain limit. In short, the rolling bearing life is shorter than the sliding bearing.

However, rolling bearings and plain bearings compared, each has its own advantages and disadvantages, each occupies a certain applicable occasions, therefore, the two can not completely replace each other, and each of them to a certain direction to expand their own field. However, due to the outstanding advantages of rolling bearings, quite a trend of the latecomer to the top. At present, rolling bearings have developed into the main mechanical support type, more and more widely used.