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浙江大学学报(工学版)
浙江大学学报(工学版)  2019, Vol. 53 Issue (11): 2085-2091    DOI: 10.3785/j.issn.1008-973X.2019.11.005
机械工程     
基于回油液阻的压力伺服阀啸叫分析
张鹤然1(),欧阳小平1,*(),郭生荣2,刘玉龙2
1. 浙江大学 流体动力与机电系统国家重点实验室，浙江 杭州 310027
2. 航空工业金城南京机电液压工程研究中心 航空机电系统综合航空科技重点实验室，江苏 南京 211100
Analysis on whistle of pressure servo-valve based on oil-return resistance
He-ran ZHANG1(),Xiao-ping OUYANG1,*(),Sheng-rong GUO2,Yu-long LIU2
1. State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China
2. Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration, AVIC Jincheng Nanjing Engineering Institute of Aircraft System, Nanjing 211100, China
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摘要：

对压力伺服阀的啸叫问题进行仿真与试验分析，验证了滑阀级回油液阻增大会引起伺服阀啸叫. 基于机电系统分析软件AMESim建立压力伺服阀完整的仿真模型，对比分析仿真与试验的动静态特性曲线，验证仿真模型的正确性. 分析滑阀级不同的回油液阻对衔铁组件中弹簧管振荡幅值的影响；剖析产生自激振荡的条件和本质原因；探究伺服阀内部振荡的传递路径. 研究发现，伺服阀滑阀级回油液阻的变化，会引起力矩马达衔铁组件的自激振荡，通过合理优化滑阀阀芯回油间隙可以避免这部分伺服阀振荡啸叫；通过增大滑阀至喷嘴腔容积也可以切断振荡传递以消除伺服阀振荡啸叫.
关键词： 压力伺服阀;  啸叫;  自激振荡;  回油液阻;  AMESim    
Abstract:

Simulation and experiment analyses were conducted on the whistle of the pressure servo-valve, and it was verified that the increase of the oil return resistance of the valve spool would cause whistling. A complete simulation model of the pressure servo-valve was built based on the electromechanical system analysis software, AMESim platform. The validity of the simulation model was verified by comparing the dynamic and static characteristic curves of the test and the simulation model. The effect of oil return resistance at different valve spool levels on the oscillation amplitude in spring tube in armature assembly were analyzed. The conditions and essential causes of self-excited oscillation were explored. The transmission path of internal oscillation of the servo valve was analyzed. Results show that the change of the oil return resistance of the servo valve spool will cause the self-oscillation of the torque motor armature assembly, and the oscillating howling of the servo valve can be avoided by reasonable optimization of the oil return gap of the valve spool. By increasing the chamber volume between the valve spool and the nozzle, the oscillation transmission path can also be cut off to eliminate the oscillating howling of the servo valve.
Key words: pressure servo-valve    whistle    self-excited oscillation    oil-return resistance    AMESim
收稿日期: 2018-06-12 出版日期: 2019-11-21
CLC:  TH 137  
基金资助: 国家自然科学基金资助项目（51675473）；国家创新群体资助项目（51521064）；高校基本科研专项资金资助项目（2018XZZX001-04）
通讯作者: 欧阳小平     E-mail: heran@zju.edu.cn;ouyangxp@zju.edu.cn
作者简介: 张鹤然（1993—），女，硕士生，从事流体传动与控制研究. orcid.org/0000-0003-3417-4087. E-mail： heran@zju.edu.cn
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引用本文:

张鹤然,欧阳小平,郭生荣,刘玉龙. 基于回油液阻的压力伺服阀啸叫分析[J]. 浙江大学学报(工学版), 2019, 53(11): 2085-2091.

He-ran ZHANG,Xiao-ping OUYANG,Sheng-rong GUO,Yu-long LIU. Analysis on whistle of pressure servo-valve based on oil-return resistance. Journal of ZheJiang University (Engineering Science), 2019, 53(11): 2085-2091.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2019.11.005    或    http://www.zjujournals.com/eng/CN/Y2019/V53/I11/2085

图 1  压力伺服阀原理图
图 2  压力伺服阀模型图
图 3  压力伺服阀动静态性能试验台
参数 数值
油液黏度/（kg·m?1·s?1） 0.008 5
油液密度/（kg·m?3） 850
油液弹性模量/MPa 1 700
回油间隙/mm 0.06
供油压力/MPa 21
回油压力/MPa 0.6
额定电流/mA 9
表 1  压力伺服阀参数
图 4  输入电流-输出压力曲线的仿真和试验结果对比
图 5  压力伺服阀频率特性曲线
图 6  伺服阀滑阀阀芯结构示意图
图 7  衔铁组件中挡板的位移变化曲线
图 8  不同回油间隙下衔铁组件的振荡幅值
图 9  不同回油间隙的伺服阀测试噪声频谱图
图 10  滑阀阀芯所受液动力变化曲线
图 11  滑阀阀芯的位移变化曲线
图 12  不同回油间隙下喷嘴腔的压力变化曲线
图 13  衔铁组件振荡时挡板的位移变化曲线
图 14  伺服阀腔体的压力变化曲线
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