中文摘要：

为研究水润滑橡胶轴承特性,采用软件仿真与试验相结合的方法对轴承偏心率、摩擦因数、橡胶变形量、最小水膜厚度、长径比和水膜压力等参数及其与轴转速和载荷之间的关系进行深入探讨.应用Pro/E软件分别建立了轴承及其间隙的3D模型,并采用流固耦合方法及气穴模型在ANSYS和Fluent软件中对轴承动态特性进行模拟.为获得实际工况下的橡胶轴承径向截面全周连续水膜压力分布,研究轴承润滑状态,采用特殊的转轴设计,将压力传感器安装在轴端,并应用无线测试技术对水膜压力信号进行采集与传输.给出水润滑轴承试验台、转轴设计与传感器布置方案,最后应用无线测试系统对八纵向沟槽水润滑凹面橡胶轴承的水膜压力进行测试,并与仿真结果比较分析.研究结果表明,多沟槽凹面橡胶轴承不存在全周完全连续水膜,处于混合润滑状态;沟槽对水膜压力分布的影响较大;轴承某些板条上会出现水囊,形成明显的压力双峰;降低转速或者增加载荷都会增大橡胶变形量与轴承摩擦因数,引起轴与轴承接触.长径比越大,轴承越不容易与轴发生接触.

英文摘要：

In order to study the properties of water-lubricated rubber bearing,the simulation and experimental methods are presented,the performance parameters of bearing including the relative ecdentricity,the friction coefficient,the deformation of rubber,the minimum water film thickness,length-diameter ratio and water film pressure,etc,and the relationship among these parameters,shaft velocity and load are analyzed.The 3D simulation models of bearing and bearing clearance are established using Pro/E,and the dynamic behaviour of bearing is simulated using the fluid-structure interaction and the cavitation model in ANSYS and Fluent.In order to obtain the circumferential continuous water film pressure distribution of radial cross section of rubber bearing under the actual working conditions,and study the lubricating state of bearing,the special shaft design is adopted.The pressure sensors are mounted on the shaft end,and the water film pressure is collected and transmitted using the wireless measurement technique.The test rig of water-lubricated bearing,the design of shaft and the layout scheme of sensors are presented.Finally,the water film pressure of eight-grooved water-lubricated rubber bearing with concave staves is measured using the wireless measurement system,and which is compared with the simulation results.The research results show that there is no circumferential continuous water film existing in multi-grooved rubber bearing with concave staves,and the bearing is in mixed lubrication state.The water film distribution is greatly effected by bearing grooves.The depression or pocket appears in the centre of some bearing staves,and this causes the double pressure peaks.The rubber deformation and the friction coefficient increase as the shaft velocity decreases and the load increases,and the contact of shaft and bearing is caused.With the length-diameter ratio increasing,the bearing is not easily in contact with the shaft.