本文以一种新型动静压转台为研究对象,通过理论和实验的方法分析了转台承载特性,并提出了以动压承载能力为目标的螺旋楔形织构几何参数优化设计方案。首先建立摩擦副物理模型并数值求解控制方程,计算液膜压力分布和部分润滑性能,并通过试验验证仿真结果。以动压承载力作为目标函数,通过分析楔形织构几何参数对目标函数的影响,以螺旋角、楔深和楔数为设计变量建立优化模型。为寻求设计变量的最优组合,使用布谷鸟搜索算法进行全局寻优并总结不同工况下的最优解规律。与原始几何参数下的转台对比,优化后的转台动力学性能得到了一定的改善,印证了本文优化方案的应用价值。
Based on a novel hybrid rotary table, the load carrying property was analyzed theoretically and experimentally, and an optimization model of geometric parameters of the spiral groove with the objective function of hydrodynamic load carrying capacity was proposed. For starters, the geometric model of the friction pair was established and the governing equation was solved numerically to obtain the pressure distribution and lubrication performance. Experiments were also carried out to verify the validity of the simulation. The hydrodynamic load carrying capacity was set as the objective function and spiral angle, wedge depth and wedge number were determined as design variables after analyzing the influence of wedge geometric parameters on the objective function to establish the optimization model. In order to seek the optimum combination of these three variables, Cuckoo Search was applied to solve the optimization model and the law of the optimal solution under various working conditions was obtained. Through comparison with optimized performance from the original performance, dynamic performance of the optimized rotary table was found to be improved, which proved the reliability of the optimization method.