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浙江大学学报(工学版)
浙江大学学报(工学版)
机械工程     
双压力航空柱塞泵压力切换动态特性
欧阳小平,李磊,方旭,杨华勇
浙江大学 流体动力与机电系统国家重点实验室,杭州 310027
characteristics of dual pressure switch for aircraft piston pump
OUYANG Xiao ping, LI Lei, FANG Xu, YANG Hua yong
State Key Laboratory of Fluid Power and Mechatronic System, Zhejiang University, Hangzhou 310027, China
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摘要：
为分析双压力航空柱塞泵压力超调产生的原因从而降低压力超调幅值,建立该泵压力调节机构的动态数学模型,并开展数值仿真研究.分析指出，泵出口等效容腔及斜盘这2
个滞后环节是导致泵压力切换时出现压力超调的主要原因.提出降低泵出口等效容腔及在控制柱塞腔前设置阻尼孔等方法来降低压力超调幅值.数值仿真结果表明,当泵出口等效容腔降低为原来的1/3时,泵从高压向低压切换和从低压向高压切换时的压力超调幅值分别下降48.6%和20.4%,设置阻尼孔能有效降低泵从低压向高压切换时的压力超调,但加大了从高压向低压切换时的压力超调幅值,因此应综合运用这些方法来降低压力超调幅值.
Abstract:

The dynamic mathematic model of the pressure controlled mechanism was established and the numerical simulation investigation was conducted to analyze the causes of pressure overshoot in order to reduce the pressure overshoot amplitude. Analysis show that the pump discharge equivalent chamber and the swash plate are the main causes of the pressure overshoot during the dual pressure switch process. Methods for minimizing the pressure overshoot amplitude were proposed, such as lowering the discharge equivalent chamber volume of the pump and configuring an adjustable damp hole. The simulation results indicate that the pressure overshoot amplitudes decrease by 48.6% with dual pressure piston pump (DPP) switching from high operating pressure to low operating pressure and decrease by 20.4% vice versa at one third of the DPP discharge equivalent chamber volume. While the damp hole can effectively suppress the pressure overshoot amplitude with DPP switching from high operating pressure to low operating pressure, and can increase the pressure overshoot amplitude vice versa. Therefore, these methods should be applied in a comprehensive way.
出版日期: 2016-09-18
:  TH 137.7  
基金资助:

国家自然科学基金资助项目（51275450）;国家“973”重点基础研究发展规划资助项目（2014CB046403）；浙江大学基本科研业务费专项资金资助项目(科研发展专项)(2013FZA4004).
作者简介: 欧阳小平(1974-)，男，副教授，博士，从事航空液压、电液控制及外骨骼机器人研究. ORCID: 0000 0002 2090 7123.E-mail: ouyangxp@zju.edu.cn
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欧阳小平,李磊,方旭,杨华勇. 双压力航空柱塞泵压力切换动态特性[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2016.03.001.

OUYANG Xiao ping, LI Lei, FANG Xu, YANG Hua yong. characteristics of dual pressure switch for aircraft piston pump. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2016.03.001.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2016.03.001    或    http://www.zjujournals.com/eng/CN/Y2016/V50/I3/397

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