Analysis and verification of the quasi-dynamic model for the three-point contact ball bearing
In order to predict the three-point contact phenomenon and reduce the risk of abnormal wear,with the help of Newton-Euler vectorial mechanics,combining with the force and structure features,relative location and velocity relationship of internal element of the arched inner race ball bearing were described,the force of bearing parts,inertia force,gyroscopic torque,fluid drag force and extrusion force were considered in process of the arched inner race ball bearing quasi-dynamic modeling considering the three-point contact condition,the optimization of algorithm for solving nonlinear equations of the model was completed,and the accuracy of the model was validated by comparing with foreign mature software and test of the cage rotational speed.The results indicated that the proposed model had a maximum error of 12％for contact angle and contact stress distribution,and a maximum error of 2％for maximum contact stress,and also had high precision for the contact traces prediction,at the same time,the model had a maximum error of 10％for the cage rotational speed by the test validation,so that the model can be used for improving optimization design of the arched inner race ball bearing.
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