椭圆形截面织构的最优参数设计模型

为建立流体润滑状态下表面织构的最优参数设计模型,采用求解表面织构润滑计算模型的方法研究织构参数和工况参数对摩擦因数的影响规律.研究结果表明:最优织构直径越大,其对应的最优织构深度也越大；深径比参数不能作为织构尺寸参数对摩擦因数影响的唯一表征,即织构直径和深度2个参数应分别进行研究,但当深径比在0.005～0.01之间时,不论织构直径和深度如何,其对应的摩擦因数均较小；最优织构面积比与织构尺寸参数及工况参数无关；载荷越大,速度越小,对应的最优织构深度越小,而最优织构直径越大.在仿真结果的基础上,建立椭圆形截面织构的最优参数设计模型,并对模型进行试验验证和应用分析.

Optimal design model of surface texture with elliptical shape

In order to establish the optimal design model of textured surface under hydrodynamic lubrication,the influence of parameters of surface texture and operation conditions on friction coefficient was studied by solving lubrication computation model of surface texture.The results show that the optimal depth increases with the increase of the optimal diameter of surface texture;the ratio of depth to diameter can not be used as the only characterization size parameter on the effect of friction coefficient and the influence of depth and diameter on friction coefficient is studied separately,but when the aspect ratio lies in 0.005 to 0.01,the corresponding friction coefficient is smaller;the optimal area ratio is not bound up with the parameters of surface texture and operation conditions;the larger the load and the smaller the velocity,the smaller the corresponding optimal depth while the larger optimal diameter of surface texture becomes.An optimal design model of surface texture with an elliptical shape is established based on the computational results,and the validation as well as the application problem of the model are also presented.