恒流径向柱塞泵输出特性分析与试验

Analysis and Test of Output Characteristics of Constant Flow Radial Piston Pump

基于特种装备车辆转向系统恒流量需求的背景,以优化某型恒流量径向柱塞泵输出动特性为目的,进行了恒流量机理解析及流量脉动分析优化。针对流量输出特性搭建了数学及仿真模型,并对比仿真、试验结果,以验证原理、模型的有效性。并以恒流量值、恒流量临界转速为约束条件,对流量脉动率进行了优化分析研究。结果表明:可通过该型结构实现柱塞泵恒流量功能;在输入转速大于恒流量临界转速后,随转速升高,平均流量将趋于稳定,而流量脉动将随转速升高而升高;通过优化柱塞直径、偏心距和节流口开口量,可有效降低流量脉动率5%以上。

In the context of the constant flow demand for the steering system of special equipment vehicles,with the aim of optimizing the output dynamic characteristics of a certain type of constant flow radial piston pump,the constant flow mechanism analysis and flow pulsation optimization were carried out.A mathematical and simulation model was established for the flow output characteristics,and the simulation and experimental results were compared to verify the effectiveness of the principle and model.Then the flow pulsation rate was optimized and analyzed under the constraints of constant flow rate and critical speed.The results indicate that:The constant flow function can be achieved through this structure;After the input speed is greater than critical speed,the average flow rate will tend to stabilize as the speed increases,while the flow pulsation will increase;Flow pulsation can be effectively reduced by more than 5%,with optimizing piston diameter,eccentricity,and inlet orifice opening.