基于仿真离散数据的偏转板射流式伺服阀液动力计算方法研究

doi:10.3901/JME.2016.12.181

摘要/Abstract

摘要： 基于偏转射流式伺服阀工作机理,提出关于其动态特性分析及前置级液动力计算检测的问题。建立关于力矩马达、射流盘前置级以及功率滑阀三部分的完整伺服阀动态模型,确定前置级液动力的近似公式,并对整阀特性进行频率分析,验证了数学模型的正确性;建立伺服阀前置级内部的二维流场模型,并基于流场仿真所获得的离散数据,给出两种可用于计算稳态液动力的方法,即动量定理法和压差法,通过计算某型伺服阀的液动力,验证上述两种方法能够相互印证;设计并实现了一种双自由度的液动力测试平台,实现了对液动力的间接测试。结果表明,采用动量定理法和压差法计算得到的液动力值,与其近似计算公式以及试验结果一致,证明了提出的液动力计算方法与测试系统均具有可行性,为此类伺服阀的改进与优化提供了技术支撑。

关键词: 测试平台, 动态模型, 离散数据, 偏转射流式伺服阀, 前置级液动力

Abstract: The problem of the dynamic characteristics analysis and prestage fluid force calculation of the jet deflector servo valve is investigated based on its operation mechanism. A dynamic model including a torque motor, a prestage jet plate and a spool valve is established. An approximate formula of fluid force is obtained and the frequency characteristic of the whole valve is analyzed. A two-dimensional model about internal flow field of the jet deflector prestage is built. Furthermore, the momentum principle method and the differential pressure method based on the simulated discrete data are designed to obtain the steady-state fluid force. These two methods are applied to fluid force calculation of a servo valve’s prestage and can confirm mutually. A two-degree of freedom test platform for measuring prestage fluid force indirectly is designed. And the experimental results about fluid force are consistent with the calculation according to the simulated data and the calculation from the theoretical formula, which proves the feasibility of the calculation and measurement method of prestage fluid force.

Key words: discrete data, dynamic model, jet deflector servo valve, prestage fluid force, test platform

中图分类号:

TG156

延皓, 康硕, 宋佳, 李长春. 基于仿真离散数据的偏转板射流式伺服阀液动力计算方法研究[J]. 机械工程学报, 2016, 52(12): 181-191.

YAN Hao, KANG Shuo, SONG Jia, LI Changchun. Research on the Calculation Methods of Fluid Force at Prestage of Jet Deflector Servo Valve Based on the Simulated Discrete Data[J]. Journal of Mechanical Engineering, 2016, 52(12): 181-191.

参考文献

[1] 卢长耿,李金良. 液压控制系统的分析与设计[M]. 北京：煤炭工业出版社,1992.
LU Changgeng,LI Jinliang. Analysis and design of hydraulic control system[M]. Beijing：China Coal Industry Publishing House,1992.
[2] 方群,黄增. 电液伺服阀的发展历史、研究现状及发展趋势[J]. 机床与液压,2007,35(11)：162-164.
FANG Qun,HUANG Zeng. Developing process,research actuality and trend of electrohydraulic servo valve[J]. Machine Tool & Hydraulics,2007,35(11)：162-164.
[3] 王传礼,丁凡,李其朋,等. 射流盘伺服阀控电液位置系统的动态特性[J]. 重庆大学学报,2003,26(11)：11-15.
WANG Chuanli,DING Fan,LI Qipeng,et al. Dynamic characteristics of electro-hydraulic position system controlled by jet-pan servo valve[J]. Journal of Chongqing University,2003,26(11)：11-15.
[4] 訚耀保,黄伟达,张曦. 电液伺服阀喷嘴挡板阀流场分析[J]. 流体传动与控制,2011,46(3)：1-5.
YIN Yaobao,HUANG Weida,ZHANG Xi. On the flow field of nozzle flapper valve of electro-hydraulic servo valve[J]. Fluid Power Transmission and Control,2011,46(3)：1-5.
[5] 訚耀保,张鹏,张阳. 偏转板伺服阀压力特性研究[J]. 流体传动与控制,2014,65(4)：10-15.
YIN Yaobao,ZHANG Peng,ZHANG Yang. Analysis of the pressure characteristics of deflector jet servo valve[J]. Fluid Power Transmission and Control,2014,65(4)：10-15.
[6] 訚耀保,张鹏,岑斌. 偏转板射流伺服阀前置级流场分析[J]. 中国工程机械学报,2015,13(2)：1-7.
YIN Yaobao,ZHANG Peng,CEN Bin. Prestage flow field analysis on deflector jet servo valves[J]. Chinese Journal of Construction Machinery,2015,13(2)：1-7.
[7] 杨月花. 伺服阀前置级射流流场分析及实验研究[D]. 哈尔滨：哈尔滨工业大学,2006.
YANG Yuehua. Analysis and experimental research of prestage jet flow field in hydraulic servo valve[D]. Harbin：Harbin Institute of Technology,2006.
[8] 马彦芳. 偏导板射流液压放大器内部流场数值模拟研究[D]. 北京：中央民族大学,2007.
MA Yanfang. Research on the flow field of jet deflector amplifier based on CFD[D]. Beijing：Minzu University of China,2007.
[9] 江林秋. 新型偏转板射流液压伺服阀的设计与研究[D]. 南京：东南大学,2013.
JIANG Linqiu. Design and research on a new type of deflection plate jet servo valve[D]. Nanjing：Southeast University,2013.
[10] MUCHLIS A. Methods and apparatus for splitting and directing a pressurized fluid jet within a servovalve[P]. USA：US20060216167 A1,2006-09-28.
[11] DHINESH K S,ANDREW R P,CHRISTOPHER R B,et al. Modelling and experimental validation of a novel piezohydraulic servovalve[C/CD]//Proceedings of the ASME 2011 Dynamic Systems and Control Conference,Arlington,VA,USA,2011..
[12] ZHU Yuchuan,LI Yuesong. Development of a deflector-jet electrohydraulic servovalve using a giant magnetostrictive material[J]. Smart Materials and Structures,2014,23：1-19.
[13] 吴鸣嵩. 电液流量伺服阀计算机辅助测试系统的研制[D]. 南京：南京理工大学,2007.
WU Mingsong. Research and design of electro-hydraulic servo valve computer-aided test-bed[D]. Nanjing：Nanjing University of Science and Technology,2007.
[14] 刘长年. 液压伺服系统优化设计理论[M]. 北京：冶金工业出版社,1989.
LIU Changnian. Optimization design theory of hydraulic servo system[M]. Beijing：Metallurgical Industry Press,1989.
[15] SMITH L M,WOODRUFFS L. Renormalization-group analysis of turbulence[J]. Annu. Rev. Fluid Mech.,1998,30：275-310.
[16] CHOUDHURY D,KIM S E,FLANNERY W S. Calculation of turbulent separated flows using a renormalization group based turbulence model[J]. Sep. Flows ASME FED,1993,149：177-187.
[17] 董志勇. 射流力学[M]. 北京：科学出版社,2005.
DONG Zhiyong. Jet mechanics[M]. Beijing：Science Press,2005.