Performance analysis and test research of high temperature and high speed hybrid ceramic ball bearings
In view of the failure characteristics of high temperature and high speed bearings,such as adhesive wear and cage fracture,the bearing dynamic analysis model and bearing testing rig were built.The optimized design,performance analysis and test verification of the bearing were carried out.The research results showed that with the increase of the speed,the contact stress of the inner ring increased,and the contact stress of the outer ring decreased.The maximum contact stress of the hybrid ceramic ball bearing was greater than that of the all-steel bearing;with the increase of the speed,the rolling elements collided with the cage.The force,cage slip rate and spin-to-roll ratio increased,and the cage stability was reduced.The cage slip rate and spin-to-roll ratio of the all-steel bearing were both greater than those of the hybrid ceramic ball bearing,and the collision force of the rolling elements and the cage was equivalent;at the oil supply temperature of 110 ℃,the speed was 120 000 r/min,the temperature of the hybrid ceramic ball bearing was lower than that of the all-steel bearing,the vibration acceleration of the hybrid ceramic ball bearing was lower than 2.0g,and the vibration acceleration of the all-steel bearing was lower than 4.0g.It can be judged that the temperature rise of hybrid ceramic ball bearings was lower than that of all-steel bearings through the temperature difference between supply and return oil;the test verified that hybrid ceramic bearings were more suitable for high-temperature and high-speed working conditions than all-steel bearings.
high temperaturehigh speedhybrid ceramic ball bearingscontact stressspin-to-roll
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