Advantages and disadvantages of rolling bearings!

Advantages and disadvantages of rolling bearings!

Today Xiaobian takes you to understand the advantages and disadvantages of rolling bearings. First of all, the advantages are as follows:

1. Small friction resistance, low power consumption, high mechanical efficiency, easy to start.

2. Size standardization, interchangeability, easy installation and disassembly, easy maintenance.

3. Compact structure, light weight and smaller axial dimension.

4. High precision, high speed, low wear and tear, long service life.

5. Some bearings have automatic alignment performance.

6. It is suitable for mass production with stable and reliable quality and high production efficiency.

Disadvantages:

1. Noise is high.

2. The structure of bearing seat is complex.

3. High cost.

Next, let's know what advantages and disadvantages rolling bearings have compared with sliding bearings, or the same, first look at the advantages:

1. The friction coefficient of rolling bearing is smaller than that of sliding bearing, and the transmission efficiency is higher. The friction coefficient of general sliding bearings is 0.08-0.12, while that of rolling bearings is only 0.001-0.005.

2. Rolling bearings have been standardized, serialized and universal. They are suitable for mass production and supply, and are very convenient for use and maintenance.

3. Rolling bearings are made of bearing steel and heat treated. Therefore, rolling bearings not only have higher mechanical properties and longer service life, but also can save non-ferrous metals which are more expensive to manufacture sliding bearings.

4. The internal clearance of rolling bearing is very small, and the processing precision of each part is high, so the running precision is high. At the same time, the rigidity of the bearing can be increased by preloading. This is very important for precision mechanical type.

5. Some rolling bearings can bear both radial and axial loads, so the structure of bearing bearings can be simplified.

6. Due to the high transmission efficiency and low heating capacity of rolling bearing, the consumption of lubricating oil can be reduced and the lubrication maintenance is relatively easy.

7. Rolling bearings can be conveniently applied to axles of any orientation in space.

However, everything is divided into two parts. Compared with sliding bearings, rolling bearings also have some shortcomings, mainly:

1. Rolling bearings bear much less load than sliding bearings of the same volume, so the radial dimension of rolling bearings is large. Therefore, sliding bearings are often used in heavy load situations and in situations requiring small radial dimension and compact structure (e.g. crankshaft bearings of internal combustion engines).

2. The vibration and noise of the rolling bearing are large, especially in the later stage of use. Therefore, the rolling bearing is difficult to be competent for the occasions with high precision and no vibration. Generally, the effect of selecting the sliding bearing is better.

3. Rolling bearings are particularly sensitive to foreign bodies such as metal chips. Once foreign bodies enter the bearing, intermittent vibration and noise will occur, which will also cause early damage. In addition, metal impurities of rolling bearings are also prone to early damage. Even if there is no early damage, the life of rolling bearings is limited. In short, the life of rolling bearings is shorter than that of sliding bearings.

In short, compared with sliding bearings, rolling bearings have their own advantages and disadvantages, each occupies a certain application occasion, therefore, the two can not completely replace each other, and develop in a certain direction, expand their own fields. However, owing to the outstanding advantages of rolling bearings, there is a tendency for the latter to take the lead. At present, rolling bearings have developed into the main support form of machinery, and are more and more widely used.

If you want to know more about joint bearings, you can contact us. Our mailbox is yuki@ywsbearing.com.