液压启闭机并联式恒压变量泵组输出流量特性研究  

Study on the output flow characteristics of parallel constant pressure variable pump unit in a hydraulic hoist

作　　者：邢玉玲 胡剑杰 钱军祥 韩争光 宁源 XING Yuling;HU Jianjie;QIAN Junxiang;HAN Zhengguang;NING Yuan(Wuhu Water Bureau,Wuhu 241000,China;Changjiang Survey Planning Design and Research Co.,Ltd.,Wuhan 430010,China)

机构地区：[1]芜湖市水务局,安徽芜湖241000 [2]长江勘测规划设计研究有限责任公司,湖北武汉430010

出　　处：《江淮水利科技》2024年第5期7-10,25,I0001,共6页Jianghuai Water Resources Science and Technology

摘　　要：针对芜湖海关段防洪墙通道闸加固改造工程中的平面闸门启闭机液压系统,构建了并联恒压变量泵组的数字仿真模型。在不同压力调节阀弹簧预紧力存在设置偏差的情况下,分析了并联恒压变量泵输出流量的动态变化及其响应特性。仿真结果表明,压力调节阀弹簧预紧力的设置偏差对多泵并联工况下各泵的输出流量有显著影响。当施加负载阶跃信号时,压力设定较低的变量泵表现出更快的动态响应,导致输出流量迅速变化;压力设定较高的泵因系统工作压力受限于较低工作压力泵的压力限定值没有达到调节阈值,因而未作出动态响应仍运行于最大排量工况。利用数字仿真模型进行的并联恒压变量泵组流量特性研究成果,可为优化液压系统设计提供理论依据。Aiming at the hydraulic system of the plane gate hoist in the reinforcement and renovation project of the flood control wall passage gate in the Wuhu customs section,a digital simulation model of the parallel constant pressure variable pump unit was constructed.Under the condition of setting deviations in the spring preloading force of different pressure regulating valves,the dynamic variation and response characteristics of the output flow of the parallel constant pressure variable pump were analyzed.The simulation results showed that the setting deviation of the spring preload of the pressure regulating valve had a significant impact on the output flow rate of each pump under the condition of multi-pump parallel.When a load step signal was applied,variable pumps with lower pressure settings exhibited a faster dynamic response,resulting in rapid changes in output flow.Pumps with higher pressure settings were still operating at the maximum displacement condition because the system working pressure was limited by the pressure limit of the lower working pressure pump,and the pressure limit value of the pump did not reach the adjustment threshold.The research results on the flow characteristics of parallel constant pressure variable pump sets using the digital simulation model can provide a theoretical basis for optimizing the design of hydraulic system.

关 键 词：并联泵组 恒压变量泵 输出流量 动态特性 数字仿真 

分 类 号：TV664.2[水利工程—水利水电工程]