基于功率键合图的多路阀一阶灵敏度分析

doi:10.3901/JME.2025.10.414

摘要/Abstract

摘要： 负载敏感多路阀广泛应用于工程机械、国防地面装备等主机液压系统中，多路阀动态性能是限制主机操控性和控制精度的关键因素。为研究多路阀结构参数对主阀动态响应特性的影响，针对典型电液先导控制型多路阀结构，基于键合图理论，搭建了多路阀系统的数学模型并推导出系统状态空间方程，用一阶灵敏度分析方法研究影响多路阀动态特性的关键结构参数及其影响权重。为验证理论分析的正确性，搭建了测试多路阀灵敏度数据的试验平台，基于类比法对定差溢流阀弹簧柔度、定差减压阀弹簧柔度、定差减压阀出口液容等参数变量进行试验验证。试验结果与仿真结论相吻合，影响多路阀动态特性的因素从大到小依次如下：定差减压阀阀芯承压面积、定差减压阀弹簧柔度、定差减压阀出口液容、多路阀进油口管路液容、定差溢流阀弹簧柔度。

关键词: 负载敏感多路阀, 功率键合图, 一阶灵敏度, 动态响应

Abstract: Load-sensing sectional valves are widely used in the hydraulic systems of construction machinery and ground equipment for national defense. The dynamic performance of sectional valves is the key factor restricting the controllability and control accuracy of the machinery. In order to study the influence of the structural parameters of sectional valves on the dynamic response characteristics of the main valve, based on the typical electro-hydraulic pilot-controlled sectional valve structure, a mathematical model of the sectional valve system was built, and the state space equation of the system was derived. The first-order sensitivity analysis method was used to study the key structural parameters affecting the dynamic characteristics of the sectional valve and their influence weights. To verify the correctness of the theoretical analysis, an experimental platform for testing the sensitivity data of the sectional valve was built. The three parameter variables including spring stiffness of the fixed differential relief valve, the spring stiffness of the fixed differential pressure reducing valve, and the liquid volume of the outlet of the fixed differential pressure reducing valve were experimentally verified based on the analogy method, The experimental results were consistent with the simulation conclusions, and obtained that the factors affecting the dynamic characteristics of the sectional valve from largest to smallest are： the pressure-bearing area of the fixed differential pressure reducing valve, the spring stiffness of the fixed differential pressure reducing valve, the liquid volume of the outlet of the fixed differential pressure reducing valve, the liquid volume of the pump and the inlet pipe of the sectional valve, and the spring stiffness of the fixed differential relief valve spring.

Key words: load sensing sectional valve, power bond diagram, first-order sensitivity, dynamic response

中图分类号:

TP604

孙瑞辉, 徐兵, 张军辉, 苏琦. 基于功率键合图的多路阀一阶灵敏度分析[J]. 机械工程学报, 2025, 61(10): 414-426.

SUN Ruihui, XU Bing, ZHANG Junhui, SU Qi. Research on Structure Influence of Sectional Valve Base on the Power Bond Graph Model[J]. Journal of Mechanical Engineering, 2025, 61(10): 414-426.

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