基于AMESim的大型磨齿机静压支承转台特性研究

Research on the Characteristics of the Hydrostatic Support Turntable of Large Gear Grinding Machine Based on AMESim

为提升大型数控磨齿机的加工精度,研究了磨齿机静压支承转台的整体结构和工况以及分析了求解油膜厚度和输出流量的理论模型,初步得出了偏载对油膜厚度具有较大影响。为了进一步验证,在分析现有参数设计方法的基础上,利用AMESim软件建立系统模型,对不同工况和结构参数进行系统动态仿真分析。仿真结果表明:静压支承转台结构参数可以保证转台产生足够的承载力,流量脉动对油膜厚度变化率的影响不到0.4%,偏载对油膜厚度变化率的影响最大为13%,静态和动态仿真结果均与实际数据相符,性能测试结果满足磨床设计要求。

In order to improve the machining accuracy of large CNC gear grinding machines,the overall structure and working condition of the hydrostatic bearing turntable of gear grinding machine were studied,and the theoretical model for solving the oil film thickness and output flow rate was analyzed.The results show that the eccentric loading has a great influence on the oil film thickness.In order to further verify,on the basis of analyzing the existing parameters design methods,the system model was established by AMESim software,and the system dynamic simulation analysis was carried out for different working conditions and structural parameters.The simulation results show that the structural parameters of the hydrostatic bearing turntable can ensure that the turntable can produce sufficient bearing capacity.The influence of flow pulsation on the change rate of oil film thickness is less than 0.4%,and the influence of eccentric loading on the change rate of oil film thickness is up to 13%.The static and dynamic simulation results are consistent with the actual data,and the performance test results meet the design requirements of the grinder.