内衬厚度对水润滑橡胶艉轴承摩擦性能的影响

Effect of Liner Thickness on Friction Performance of Water-lubricated Rubber Stern Bearing

基于流固耦合的基本理论,考虑橡胶衬层弹性变形因素,构建出水润滑艉轴承橡胶内衬有限元模型,利用MATLAB软件数值分析橡胶内衬厚度对水膜厚度和水膜压力的分布状况及摩擦性能的影响规律,并在SSB-100型艉轴承试验机上进行试验验证。研究结果表明:在相同的工况下,随着内衬厚度的增加,橡胶衬层弹性变形增大,水膜厚度增大,水膜压力减小;相应地,流体润滑效果越好,摩擦因数越小;在相同厚度下,随着转速的增大,摩擦因数先减小后趋于平稳。试验结果验证了仿真分析的正确性。

Based on the basic theory of fluid-solid coupling and considering the elastic deformation of rubber liner,a finite element model of water lubricated stern bearing was established.The influences of rubber liner thickness on water film thickness,water film pressure distribution and friction performance were analyzed numerically by MATLAB software,and the test was carried out on the SSB-100 stern bearing test machine. The results show that under the same conditions,with the increasing of rubber liner thickness,the elastic deformation of rubber layer is increased,the water film thickness is increased,the water film pressure is decreased.Accordingly,the fluid lubrication is improved,and the friction coefficient is decreased.Under the same thickness of rubber liner,with the increasing of the rotational speed,the friction coefficient is firstly decreased and then tends to be stable.The test results verify the correctness of the simulation analysis results.