转套式配流系统闭死角对工作脉动的影响研究  

Influence on Working Pulsation of Closed Angle of Rotating-Sleeve Distributing-Flow System

作　　者：张延君[1] 张洪信[1] 赵清海[2] 王新亮[1] 程前昌 ZHANG Yanjun;ZHANG Hongxin;ZHAO Qinghai;WANG Xinliang;CHENG Qianchang(School of Electromechanic Engineering;Power Integration and Energy Storage Systems Engineering Technology Center,Qingdao University,Qingdao 266071,China)

机构地区：[1]青岛大学机电工程学院,山东青岛266071 [2]青岛大学动力集成及储能系统工程技术中心,山东青岛266071

出　　处：《青岛大学学报（工程技术版）》2018年第1期102-106,共5页Journal of Qingdao University(Engineering & Technology Edition)

基　　金：国家自然科学基金资助项目(51575286);山东省自然科学基金资助项目(2014ZRB01503)

摘　　要：为了降低转套式配流系统在转换过程中出现的冲击现象和噪声,本文根据配流系统配流特征,分析了泵腔在两个阶段中闭死升压和降压的数学模型。同时,为改善配流系统工作中液压冲击现象,选取最佳闭死角,并利用仿真软件Fluent,对配流系统工作循环中流量和压力变化进行数值模拟。仿真结果表明,当闭死压缩角为3°时,对流量特性及泵腔压力脉动的影响最小,且最接近理论分析;在任意膨胀阶段,泵腔内部都出现了不同程度的空化现象,且膨胀角越小,流量脉动越大,综合考虑膨胀角选取2°最合适。该研究为转套式配流系统确定闭死角的大小提供了理论依据。In order to decrease impact and noise in the conversion process of rotating-sleeve distributing-flow system,the mathematical models of pre-loading and pre-depressurization in piston pump are established based on distributing-flow characteristics.And we choose the best dead angle and simulate the distributing flow fluid model using software Fluent to improve the hydraulic shock.As a consequence,the results show that the compression angle 3°is closest to theoretical value and has the minimum influence on flow and pump pressure characteristic.On the other hand,pump chamber appears cavitation phenomenon on a certain degree and the flow pulsation is smaller with greater expansion angle.So the expansion angle 2°is more suitable to distributing-flow system.The study concretely provides the theoretical foundation for ensuring the size of closed angle.

关 键 词：转套式配流系统 闭死阶段 压缩角 膨胀角 仿真分析 

分 类 号：TH137.51[机械工程—机械制造及自动化]