Abstract:In order to study the lubrication characteristics of a new type waterlubricated rubber bearing with mixed grooves,a thermalfluidstructure coupling model for waterlubricated rubber bearing was established by finite element method,the differences of rubber liner deformation,water film pressure distribution and flow field velocity of the rubber bearing with mixed grooves,T-type grooves and V-type grooves were analyzed under different inlet water temperature and different rotation speeds.The results show that the rubber bearing with mixed grooves can better adapt to the change of water temperature,solve the problems of large deformation of rubber layer and low water film pressure for the rubber bearing with T-type grooves and V-type grooves,and effectively improve the sharp change of water film pressure peak in bearing area.As the inlet water temperature increasing,the rubber layer deformation and the water film pressure are decreased,the bearing capacity is reduced,and the downward trend of the bearing capacity at higher speeds is more obvious than that at low speeds.With the increase of inlet water temperature,the viscosity coefficient of water is decreased continuously,the lubrication state of rubber bearing becomes worse,and the bearing lubrication state changes from the mixed lubrication and elastohydrodynamic lubrication state to the fully mixed lubrication state.