液压与气动2025，Vol.49Issue(5)：73-80,8.DOI:10.11832/j.issn.1000-4858.2025.05.009
超高压大流量水压比例卸荷阀动态特性分析
Analysis of Dynamic Characteristics of Ultra-high Pressure and Large Flow Hydraulic Proportional Unloading Valve
刘宇 1刘银水 2刘勇 3王振耀2
作者信息
- 1. 兰州理工大学 能源与动力工程学院,甘肃 兰州 730050
- 2. 华中科技大学 机械科学与工程学院,湖北 武汉 430074
- 3. 武汉华喜特种液压设备有限公司,湖北 武汉 430000
- 折叠
摘要
Abstract
The existing on/off high pressure large-flow electromagnetic unloading valves suffer from issues such as pressure regulation difficulty and discontinuous fluid supply,which struggle to meet the requirements of rapid response and on-demand adjustment of high-pressure pump output pressure in pumping station fluid supply systems.To address these challenges,an unloading valve utilizing proportional pilot valve control for main valve spool displacement regulation is developed,enabling on-demand rapid fluid supply and multi-range pressure modulation.A simulation model of the unloading valve is established using AMESim simulation software to investigate the influence patterns of main valve spring cavity,spring stiffness,spring preload,and damping hole diameter on the dynamic characteristics of the main valve,with subsequent experimental validation.The results demonstrate:Reduced spring cavity shortens both pressure build-up and relief times;Spring stiffness and preload primarily affect residual pressure and pressure relief duration;Damping hole diameter mainly impacts residual pressure and pressure rise time.Through prototype testing with optimized structural parameters,the experimental data revealed pressure rise time is 388 ms,pressure relief time is 436 ms,and residual pressure is 1.88 MPa.关键词
比例卸荷阀/动态特性/高压/大流量Key words
proportional unloading valve/dynamic characteristics/high pressure/large flow分类
机械工程引用本文复制引用
刘宇,刘银水,刘勇,王振耀..超高压大流量水压比例卸荷阀动态特性分析[J].液压与气动,2025,49(5):73-80,8.
