东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (8): 1170-1174.DOI: 10.12068/j.issn.1005-3026.2015.08.023

• 机械工程 • 上一篇    下一篇

挖掘机虚拟载荷下换向阀开启过程的液动力分析

王安麟， 王坚， 付志翼   

  1. (同济大学 机械与能源工程学院， 上海201804)
  • 收稿日期:2013-12-23 修回日期:2013-12-23 出版日期:2015-08-15 发布日期:2015-08-28
  • 通讯作者: 王安麟
  • 作者简介:王安麟(1954-)，男，陕西安康人，同济大学教授，博士生导师.
  • 基金资助:
    工业和信息化部2011年科技成果转化项目——工程机械用高压柱塞泵及液压马达传动装置产业化.

Analysis of Flow Forces During Muti-valve’s Opening Under Excavator Virtual Load

WANG An-lin， WANG Jian， FU Zhi-yi   

  1. School of Mechanic Engineering， Tongji University， Shanghai 201804， China.
  • Received:2013-12-23 Revised:2013-12-23 Online:2015-08-15 Published:2015-08-28
  • Contact: WANG Jian
  • About author:-
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摘要： 为了提高换向阀开启过程的换向性能，以降低该过程的液动力为目标，提出液压挖掘机虚拟载荷下开启过程的阀芯结构形态设计方法:以液压挖掘机整机动态性能试验数据为基础， 将其作业的周期性、随机性载荷特征抽象为具有统计特性的虚拟载荷；再以虚拟载荷为边界条件，以降低开启过程阀芯所受液动力为评价标准，分析不同阀芯结构形态的流固耦合动力学响应，探讨换向阀阀芯结构优化设计方法.结果表明，合理等效阀口面积的U型槽结构可有效降低不同虚拟载荷下的阀芯液动力.

关键词: 换向性能, 虚拟载荷, 液动力, 流固耦合, 结构设计

Abstract: To improve the muti-valve’s commutation ability and to reduce the valve’s flow forces during its opening， the valve structure of a hydraulic excavator under virtual loads was designed. First， the excavator virtual load model was established based on the excavator dynamic test data， and the statistics were used to express the load’s periodic and random characteristics. Then， a 3D valve model with the boundary conditions of virtual load was proposed to solve the flow forces during the valve’s opening using the fluid structure interaction method. Finally， the flow force response characteristics of different valve spool structures were presented by the model. The results show that the spool with U-groove of moderate equivalent valve orifice area can effectively reduce the flow force under a series of virtual loads.

Key words: commutation ability, virtual load, flow force, fluid-structure interaction, spool design

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