Compared with sliding bearing, rolling bearing has the following advantages:
1. The friction coefficient than sliding bearings of rolling bearings is small, high transmission efficiency. General sliding bearing friction coefficient is 0.08 0.12, and the friction coefficient of
How to clean the motor bearings
is only 0.001 0.005;
2, rolling bearing has been to achieve standardization, seriation, generalization, suitable for mass production and supply, use and maintenance is very convenient.
3. Rolling bearing made of bearing steel, and after heat treatment, therefore, the rolling bearing not only has high mechanical performance and longer service life, and can save the manufacture sliding bearing used in prices more expensive nonferrous metals;
4. Rolling bearing internal clearance is small, the processing precision of parts is higher, therefore, high precision. At the same time, can be made by the method of additive load bearing rigidity increase. This is very important for precision machinery;
5. Some of the rolling bearing can bear radial load and axial load at the same time, therefore, can simplify the structure of the bearing pedestal;
6. Because of the rolling bearing high transmission efficiency, less calorific value, therefore, can reduce consumption of lubricating oil, lubricating maintenance more convenient;
7. Rolling bearing can be easily applied to uranium in any direction.
But all, every coin has two sides and rolling bearings have some shortcomings, mainly:
1. Rolling bearing the load capacity is much less than the same volume of sliding bearing, therefore, the rolling bearing's radial size large. So, in under heavy load and requiring small radial size, compact structure requirements < such as internal combustion engine crankshaft bearing), use the sliding bearing;
2. Rolling bearing vibration and noise is bigger, especially in the use of the late particularly remarkable, therefore, the high precision requirements, and are not allowed to have vibration occasions, rolling bearing is difficult to do, generally choose the effect of the sliding bearing is better.
3. Particularly sensitive to scrap metal and other foreign bodies, rolling bearings bearings once in foreign body, can produce bigger vibration and noise in an intermittent, also can cause early damage. In addition, the rolling bearing due to metal inclusions, etc. Also the possibility of early damage of the easy happening. Even if you don't happen early damage, the service life of rolling bearing also has certain limits. In a word, the life of the rolling bearing is the shorter of the sliding bearing.
Rolling bearing compared with sliding bearing, however, each have advantages and disadvantages, each has certain applicable occasions, therefore, they cannot fully replace each other, and to a certain direction, expand their areas. However, due to the prominent advantages of rolling bearings, there is quite a competitor. Today, the development of rolling bearing has become the main mechanical bearing type, more and more widely applied.
