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Characteristics, advantages and disadvantages of rolling bearings

Characteristics, advantages and disadvantages of rolling bearings


Rolling bearing is a precision mechanical element that reduces friction loss by converting sliding friction between shaft and shaft seat into rolling friction.The rolling bearing is generally composed of four parts: inner ring, outer ring, rolling body and cage.The inner ring is combined with the shaft, rotating with the shaft, and the outer ring is coordinated with the bearing housing to play a supporting role.The rolling body is distributed between the inner ring and the outer ring through the cage.The cage can make the rolling body evenly distributed, guide the rolling body to rotate, play the role of lubrication.

Benefits of rolling bearing

(1) significant energy saving.Due to the characteristics of the rolling bearing's own movement, the friction force is far less than that of the sliding bearing, which can reduce the power consumption consumed in the friction resistance, so the energy saving effect is significant.From the theoretical analysis and production practice, general small ball mill with rolling bearing can save 30%~35% of electricity, medium ball mill can save 15%~20% of electricity, and large ball mill can save 10%~20% of electricity.Since the ball mill itself is a major energy user in production, this will mean significant savings.

(2) easy maintenance and reliable quality.The use of rolling bearing can save the melting, casting and scraping of babbitt alloy materials and a series of complex technical requirements of its high maintenance process and oil supply, water supply cooling system, so the maintenance amount is greatly reduced.And because the rolling bearing is made by the professional manufacturer, the quality is always guaranteed.Also to the ball mill manufacturers to use the convenience.

Advantages of rolling bearing

1, small friction resistance, small power consumption, high mechanical efficiency, easy to start;

2. Standardized size, interchangeability, easy to install and disassemble, easy to maintain;

3. Compact structure, light weight, and smaller axial size;

4, high precision, large load, small wear, long service life;

5. Some bearings have the performance of automatic centering;

6. Suitable for mass production, stable and reliable quality, high production efficiency;

7. The friction torque of the drive is much lower than that of the hydrodynamic bearing, so the friction temperature rise and power consumption are lower;

8. The starting friction torque is only slightly higher than the rotational friction torque;

9. The sensitivity of bearing deformation to load change is less than that of hydrodynamic bearing;

10. It can operate normally with only a small amount of lubricant, and can provide lubricant for a long time during operation;

11. The axial dimension is smaller than the traditional hydrodynamic bearing;

12. Can bear combined radial and thrust loads at the same time;

13, in a large load-velocity range, the unique design can obtain excellent performance;

14. The bearing performance is relatively insensitive to the fluctuation of load, speed and running speed.

Rolling bearing defect

1. Loud noise.

2. The structure of bearing pedestal is relatively complex.

3. High cost.

4. Even if the bearings are well lubricated, properly installed, dust-proof, moisture-proof and operate normally, they will eventually fail due to fatigue of rolling contact surfaces. 

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