基于AMESim的新型变排量机油泵建模与仿真研究

Research on Modeling and Simulation of New Variable Displacement Oil Pump Based on AMESim

以一种新型叶片柱塞复合形式的二级变量叶片泵为研究对象,其主要特点是将叶片顶端嵌入到定子中,转子、叶片、定子同时转动,减小了高速时的叶片冲击。推导叶片柱塞复合作用下泵的瞬时流量特性公式。基于AMESim仿真平台搭建比例电磁阀、瞬时流量、变量机构模型,并对二级变量叶片泵特性进行仿真,并通过台架试验进行相关验证。实验结果表明:该泵在中低速下压力-流量曲线吻合较好,说明流量和变排量建模准确;加减速曲线说明泵在比例阀不同占空比时,压力调节具有稳定性。

Taking a new vane plunger composite type of two-stage variable vane pump as research subject,its key characteristic is to reduce high-speed vane impact by embedding the top of the vane into the stator and rotating the rotor,vane and stator simultaneously.The instantaneous flow characteristics equation of the pump under the compound action of vane plunger was derived.A proportional solenoid valve model,an instantaneous flow model,a variable mechanism model,were built.The characteristics of the two-stage variable vane pump were simulated based on AMESim simulation platform.The relevant verification was carried out by bench test.The experimental results show that the pressure-flow curve of the pump matches well at medium and low speeds,indicating accurate modeling of flow and variable displacement;the acceleration and deceleration curves indicate that the pressure regulation of the pump is stable under different duty cycles of the proportional valve.