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1 design structure
Special vibration bearing:
A. roll diameter increases, the length of the rolling body is increased. The B. holder is guided by the outer ring gear, and the force acting on the roller is reduced. C. uses the inner ring gear guide roller, improve the roller running. D. cylindrical roller bearing cage adopts the integral structure and the strength is greatly improved. E. the outer diameter of the heart bearing design has the oil groove oil hole, and the lubrication effect is good.
Ordinary bearing:
A. roller diameter and rolling body length are small. B. cage has a roller or inner guide. C. cylindrical roller bearing cage is made of rivet structure. It is easy to loose and fall off. D. the outer diameter of the heart bearing no oil groove oil hole, poor lubrication.
2 selection of materials
Special vibration bearing:
A. inside and outside circle and rolling body adopt vacuum degassing bearing steel, good fatigue resistance. B. cage adopts aluminum iron manganese bronze material, high strength, good elasticity, better wear resistance.
Ordinary bearing:
A. inner ring and rolling element bearing steel. B. cage is made of zinc brass material, low strength and poor elasticity.
3 heat treatment method
Special vibration bearing:
A. internal and external loop using the shell - horse mixed quenching or quenching + high temperature tempering, the hardness is uniform, the internal stress is small; toughness, impact and vibration. The stability of B. in the 150C temperature is good.
Ordinary bearing:
The inner and outer ring is made of ordinary quenching method, poor toughness, poor anti shock and vibration, and the thermal stability is not good.
4 tolerances and manufacturing processes
Special vibration bearing:
A. strictly according to the P6 level of precision manufacturing, in particular, the internal and external diameter is very small. B. rolling body size difference is less than or equal to 0.002. C. cylindrical roller outer diameter has a convex degree of practice, to avoid stress concentration. D. rolling surface finishing, high finish. Ordinary bearing:
A. general PO level precision tolerance (part of the P6 level) manufacturing. B. roller group is less than or equal to 0.005. C. cylindrical roller without convexity. D. part of the roller way only for polishing, low finish.
5 internal clearance
Special vibration bearing:
According to the clearance requirement of vibration machine production, the scope of control in a small range, good consistency.
Ordinary bearing:
Clearance of general production according to the standard clearance group or C3 group, or small, or large range, large discreteness.
6 use effect
Special vibration bearing:
Low noise, low temperature rise, good stability, long service life, no early fatigue phenomenon.
Ordinary bearing:
Wen Shenggao, the noise is big, the stability is not good, the service life is short, has the early fatigue phenomenon