Research on the Influence of Bearing Pair Contact on the Dynamic Behavior of Vertical Rotor Systems
Considering the contact force of jewel-pivot bearing pair,the nonlinear dynamic model of the vertical rotor system is established,and the influence of the contact parameters of the bearing pair on the inherent characteristics of the rotor system is analyzed.The effects of lateral connection stiffness and sliding friction coefficient on the dynamic behavior of the rotor system are discussed.The results show that the introduction of the bearing force model will lead to a resonance peak near the modal frequency of the pivot,and the change of the contact area of the bearing pair will trigger low-frequency procession.With the increase of the connection stiffness,the wear state of the pivot will gradually change from ring contact to eccentric wear contact and finally to large-scale ring contact.In the case of boundary lubrication,the sliding friction coefficient will not affect the rotor system;while in dry friction state,the increase of sliding friction coefficient will accelerate the eccentric wear of the system.The research results are of great significance to the dynamic optimization design of vertical rotor systems.
vibration and wavebearingjewel-pivot bearing pairvertical rotor systemconnection stiffnessfriction coefficient
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