基于AMEsim的双压力柱塞泵的 数字建模与热分析

利用AMESim仿真软件对双压力液压系统进行了建模与仿真.建立了轴向柱塞泵运动方程、流量方程和配油盘的仿真模型,进行了相应的仿真计算.建立了双压力泵控制阀的仿真模型,着重分析了双压泵在高、低2种压力下的流量特性和压力切换时的动态特性.建立了一套完整的液压系统,分析比较了恒压变量泵液压系统和双压力液压系统在相同负载、散热环境和运行时间下的温升情况.结果表明双压力泵的动态特性与理论分析基本相符,在需要2种压力的系统中,双压力泵源在工作效率上明显优于恒压泵源.

Digital modeling of double press axial piston pump and its thermal analysis basing on AMEsim

Hydraulic system simulation model of double press axial piston pump was estabhshed m AMESim. Movement function, flux function and swash plate model of axial piston pump were created, and carried on the corresponding simulation computation. Control valve simulation model of double press axial piston pump was established in AMESim, and the analysis emphasis were the flux characteristic and the pressure cut dynamic characteristic under two pressures. To compare the result of temperature rise, a complete hydraulic systems was established for double press axial piston pump and fix press axial piston pump under two kinds of hydraulic pump sources in the same load, the same radiation environment and the same running time. Simulation results show that dynamic characteristic of double press axial piston pump match the theory, the efficiency exceeds fix press axial piston pump.