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1 appearance characteristics
A. The diameter of the rolling element increases and the length of the rolling element increases.
B. The cage consists of outer ring edge retaining rollers to reduce the force on the rollers.
C. The inner ring edge retaining roller is adopted to improve the roller operation.
D. Cylindrical roller bearing cage adopts integral structure, which greatly improves the strength.
Common bearing:
A. The diameter and length of the roller body are small.
B. The cage has rollers or inner rings.
C. The cylindrical roller bearing cage adopts rivet structure, which is easy to loosen and fall off.
2. Selection of materials
Special bearing for vibration:Difference Between Vibration Bearing and Ordinary Bearing
A. The inner and outer rings and rolling elements are made of vacuum degassed bearing steel with good fatigue resistance.
B. The cage is made of aluminum iron manganese bronze with high strength, good elasticity and better wear resistance.
Common bearing:
Clearance is generally produced according to standard group or C3 group, with small clearance or large range and large discreteness.
A. The inner and outer rings adopt shell horse mixed quenching or martensite quenching + high temperature tempering, with uniform hardness and low internal stress; Good toughness, impact and vibration resistance.
B. Good stability when working within 150C.
Common bearing:Difference Between Vibration Bearing and Ordinary Bearing
The inner and outer rings adopt ordinary quenching method, which has poor toughness, poor impact and vibration resistance and poor thermal stability.
4. Tolerance and manufacturing process
Special bearing for vibration:Difference Between Vibration Bearing and Ordinary Bearing
A. It is manufactured in strict accordance with the P6 precision standard, especially the internal and external diameter tolerance is very small.
B. Mutual difference of rolling element size ≤ 0.002
C. The outer diameter of cylindrical roller has convexity to avoid stress concentration.
D. Super finish treatment of rolling surface, high finish.
A. Ordinary Po level accuracy tolerance (some P6 standards) manufacturing.
B. Grouping of rolling elements ≤ 0.005.
C. Cylindrical roller without convexity practice.
D. Some raceways are only polished with low finish.
5. Internal clearance
Special bearing for vibration:Difference Between Vibration Bearing and Ordinary Bearing
The clearance is produced according to the requirements of vibrating machinery, and the range is controlled in a very small range with good consistency.
Common bearing:
Clearance is generally produced according to standard group or C3 group, with small clearance or large range and large discreteness.
6. Use effect
Special bearing for vibration:
Low noise, low temperature rise, good stability, long service life and no early fatigue.
Common bearing:
High noise, high temperature, poor stability, short service life and early fatigue.
Bearing is an important mechanical basic component, which is widely used in various fields of national economy and national defense. The machinery and working environment of bearings vary greatly, so special attention should be paid to the maintenance of bearings to improve the service life of bearings. Bearing is a kind of precision part with high dimensional precision.
If it is installed improperly, it will lose its due precision and performance, and even cause bearing failure in serious cases. Therefore, the bearing installation site and installation tools must be clean to prevent various particles from entering the bearing. When installing and disassembling the bearing, do not hammer directly, but apply uniform pressure. When the fit interference between the shaft and the bearing is large, the bearing should be installed immediately after heating.