海水淡化轴向柱塞泵的虚拟样机技术研究

为了研制反渗透海水淡化用高压轴向柱塞泵,采用虚拟样机技术对其机械动力学和压力流量特性进行了预测.泵的三维几何模型基于结构设计得到：通过施加运动学约束和对关键零件进行进行柔性化处理建立了泵的机械模型;通过对泵内动态压力和流量分析得到了泵的流体模型;联合机械模型与流体模型建立了泵的虚拟样机模型.通过运行泵虚拟样机模型获得了主要零件的运动学和动力学规律、泵出口的动态流量和压力规律及关键零件的动态等效应力等数据,仿真结果表明：泵的主要性能达到了设计要求,关键零件具有较大的强度裕度,可以在更高的压力等级下运行.

Virtual prototype technology for axial piston pumps used in seawater desalination

In order to develop a high pressure axial piston pump for sea water reverse osmosis(SWRO) desalination project,the main performance and mechanical dynamics properties of the pump were predicted by virtual prototype(VP) technology.The solid model of the pump was created after the structural design,and then the rigid-flexible mixture mechanical model of the pump was constructed after the kinematic constraints were imposed and key components were flexible in solid model.The hydraulic model of the pump was created by the analysis of dynamic pressure and flow,and then the VP model of the pump was established by the combination of the mechanical model and the hydraulic model.By the VP model and corresponding simulation,the kinematics and dynamics characteristics of the moving parts and joints,the dynamic pressure and flow rate at the outlet of the pump,the dynamic equivalent stress and strain of key components were acquired.Results show that the main performance of the pump meets the design requirements and can be run at a higher pressure level for significant strength margin of key components.