A Robust Evaluation Method of Micro Characteristics for Directional Control Valve of Hydraulic Excavators

doi:10.7652/xjtuxb201602020

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A Robust Evaluation Method of Micro Characteristics for Directional Control Valve of Hydraulic Excavators

更新时间：2025-07-09

- A Robust Evaluation Method of Micro Characteristics for Directional Control Valve of Hydraulic Excavators
- Vol. 50, Issue 2, Pages: 118-123(2016)
- 作者机构：
  
  同济大学机械与能源工程学院,上海,201804
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201602020
  CLC： TH137.52
- Online First：10 February 2016，
  
  Published：2016
- 稿件说明：
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A Robust Evaluation Method of Micro Characteristics for Directional Control Valve of Hydraulic Excavators[J]. 2016, 50(2): 118-123.
DOI：

A Robust Evaluation Method of Micro Characteristics for Directional Control Valve of Hydraulic Excavators[J]. 2016, 50(2): 118-123. DOI： 10.7652/xjtuxb201602020.

摘要

针对液压挖掘机换向阀微动性能评价问题

提出采用最小敏感流量系数作为定量化评价微动性能的方法。在先导压力与工作流量同步的条件下

以相对先导压力的工作流量变化梯度为其微动性能评价指标

并在以液压马达表达工作流量变化的前提下构建液压挖掘机换向阀微动的仿真过程

通过与多路阀动态特性实验台架物理实验结果对比来验证其仿真的可靠性; 以某型号整机微动性能良好的液压挖掘机多路阀回转联为对象

在其微动初段敏感度与微动末段敏感度之比为7.35的情况下

敏感流量系数的变化具有健壮性。研究结果表明

将最小敏感流量系数作为其微动性能评价指标具有较高的合理性

对阀芯的结构拓扑形态优化设计具有实际意义。

Abstract

A micro performance evaluation method is proposed to solve the problem of micro performance evaluation in excavator directional control valves and the method uses the least sensitive flow coefficient as a quantitative evaluation. The working flow rate gradient relative to pilot pressures is used to evaluate the micro performance under the synchronization condition of the pilot pressure and the outlet flow. Then the micro analytical process of directional control valve is built under the premise of working flow rate that is expressed by a hydraulic motor and based on the results of dynamic characteristics test bench for hydraulic components. Comparisons between analytical and experimental results verify the reliability of the simulation. A swing way of a multi-way valve used in hydraulic excavator is taken as a research object

and the results show that the changes of flow coefficient is robust in case that the sensitivity of micro early stage is 7.35 times of the sensitivity of micro last stage.The rationality of the evaluation method is verified. The results show that the proposed method has engineering value to valve's structural morphology optimization designs.

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references

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