中文摘要：

随着液压传动技术朝着高压大流量方向发展，大功率的工程设备层出不穷，当单一液压泵无法满足设备液压流量的需求时，工程上通常采用多泵合流的方式实现较大的输出流量。多泵合流方式除了能够输出较大的流量外，还可以通过不同排量泵的组合形式产生不同的流量输出实现液压系统的节能控制。基于此，该文主要对采用普通交流电机-定量泵的多泵合流液压能源系统进行理论分析，建立相关数学模型，利用AMESim软件进行仿真分析，研究多泵合流节能控制过程中不同泵组的启闭对管路压力的影响规律。采用PID控制器实现管路压力的闭环调节，降低了泵组切换对管路中压力波动的影响，从而为多泵合流液压能源系统的设计和节能控制提供参考。

英文摘要：

With the development of hydraulic transmission technology in the direction of high pressure large flow, high power engineering equipment emerge endlessly, in the engineering, the way of multiple pump confluence is usually adopted to achieve larger flow rate when a single hydraulic pump can't meet the requirements of hydraulic fluid flow equipment. The way of multiple pump confluencenot only can output a larger flow,but also can realize the energy-saving control of hydraulic system through different combination forms of different output of hydraulic pump. Based on this, this article mainly discusses the analysis theory of multiple pump confluence hydraulic energy system, establish relevant mathematical model, using the AMESim simulation software, study the influence law of different pump group open/close to the line pressure in the process of energy saving control of the multiple pump confluence, achieve closed-loop adjustment of pressure in pipeline by using PID controller, reduce the pressure fluctuant effect of switching pumps in the pipeline,provide reference for multiple pump confluence energy-saving control of hydraulic energy system.