配合间隙对溢流阀稳态液动力的影响

中国机械工程

配合间隙对溢流阀稳态液动力的影响

瞿道海;周云山;罗威;刘云峰;傅兵

湖南大学机械与运载工程学院，长沙，410082

出版日期:2018-04-25 发布日期:2018-04-24
基金资助:
国家自然科学基金资助项目（51475402）
National Natural Science Foundation of China（No. 51475402）

Influences of Fit Clearances on Steady-state Fluid Forces of Relief Valves

QU Daohai;ZHOU Yunshan;LUO Wei;LIU Yunfeng;FU Bing

School of Mechanical and Vehicle Engineering,Hunan University,Changsha,410082

Online:2018-04-25 Published:2018-04-24
Supported by:
National Natural Science Foundation of China（No. 51475402）

摘要/Abstract

摘要： 针对稳态液动力影响电液比例溢流阀调压精度的问题，建立了内流式滑阀液动力数学模型，基于CFD仿真平台，构建了考虑配合间隙的滑阀模型，并搭建了试验平台以验证模型的正确性，研究了不同配合间隙对滑阀稳态液动力的影响。结果表明：考虑配合间隙的滑阀模型与试验测试结果有很好的一致性；溢流阀在工作过程中，阀口开度与配合间隙非常接近,随着压力升高，阀口开度变小，射流角接近20°；随着配合间隙增大，阀口开度变小，射流角变大；配合间隙在一定范围内，液动力随着间隙增大而增大，当达到临界值后，配合间隙对液动力的影响变小。

关键词: 稳态液动力, 溢流阀, 射流角, 配合间隙

Abstract: Aiming to solve the pressure regulating precision of electro-hydraulic proportional relief valves affected by steady-state fluid forces, a flow force mathematical model of converged flow spool valves was built. The valve model considering fit clearances was established based on CFD, and a test rig was set up to validate the correctness of the model. Then the influences of different fit clearances on steady-state fluid forces of spool valves were studied. The results show that the spool valve model considering fit clearances has a good coincidence with test results. While relief valve is working, the valve opening is close to fit clearance extremely. As pressure increases, valve opening becomes smaller, and jet angle gets close to 20°. As the clearance increases, valve opening turns smaller, jet angle becomes bigger. In a certain ranges, steady-state fluid forces increase with the increase of clearances, and fit clearances have a small influence on steady-state fluid forces when clearances reach the critical values.

Key words: steady-state fluid force, relief valve, jet angle, fit clearance

中图分类号:

TP137.52

瞿道海;周云山;罗威;刘云峰;傅兵. 配合间隙对溢流阀稳态液动力的影响[J]. 中国机械工程.

QU Daohai;ZHOU Yunshan;LUO Wei;LIU Yunfeng;FU Bing. Influences of Fit Clearances on Steady-state Fluid Forces of Relief Valves[J]. China Mechanical Engineering.

参考文献

[1]GAD O. Comprehensive Nonlinear Modeling of a Pilot Operated Relief Valve[J]. Journal of Dynamic Systems，Measurement，and Control，2013，135(1)：011011.
[2]DASGUPTA K，WATTON J. Dynamic Analysis of Proportional Solenoid Controlled Piloted Relief Valve by Bondgraph[J].Simulation Modelling Practice and Theory，2005，13(1)：21-38.
[3]ZUNG P S，PERNG M H.Nonlinear Dynamic Model of a Two-stage Pressure Relief Valve for Designers [J]. Journal of Dynamic Systems Measurement & Control，2002，124(1)：62-66.
[4]LEE G S，SUNG H J，KIM H C，et al.Flow Force Analysis of a Variable Force Solenoid Valve for Automatic Transmissions[J]. Journal of Fluids Engineering，2010，132(3)：031103.
[5]冀宏，傅新，杨华勇.非全周开口滑阀稳态液动力研究[J].机械工程学报，2003，39(6)：13-17.
JI Hong，FU Xin，YANG Huayong. Study on Steady Flow Force of Non-circular Opening Spool Valve [J]. Chinese Journal of Mechanical Engineering，2003，39(6)：13-17.
[6]吴小锋，干为民，刘春节，等.液压换向滑阀内部结构的健壮性设计[J].中国机械工程，2015，26(15)：2030-2035.
WU Xiaofeng，GAN Weimin，LIU Chunjie，et al. Robust Design of Hydraulic Slide Valve Internal Structure[J].China Mechanical Engineering，2015，26(15)：2030-2040.
[7]YUAN Q，LI P Y.Using Steady Flow Force for Unstable Valve Design：Modeling and Experiments [J]. Journal of Dynamic Systems，Measurement，and Control，2005，127(3)：451-462.
[8]KRISHNASWAMY K，LI P Y.On Using Unstable Electrohydraulic Valves for Control[J]. Journal of Dynamic Systems，Measurement，and Control，2002，124(1)：183-190.
[9]刘晓红，柯坚，刘桓龙.液压滑阀径向间隙温度场的CFD研究[J]. 机械工程学报，2006，42(s1)：231-234.
LIU Xiaohong，KE Jian，LIU Henglong，et al.CFD Research on Temperature Field in Radial Clearance of Hydraulic Spool Valve[J]. Chinese Journal of Mechanical Engineering，2006，42(s1)：231-234.
[10]PAN X D，WANG G L，LU Z S，et al.Simulation Research on Effect of Diametral Clearance of Spool Valve to Valve Orifice Discharge Characteristic [J]. Key Engineering Materials，2009，392/394：184-188.
[11]WEI M，YANG S，WU L，et al.Simulation and Experiment on the Flow Field in Fit Clearance for a Large Size Spool Valve[C]//International Conference on Fluid Power and Mechatronics.Beijing：IEEE，2011：748-751.
[12]张晓俊，权龙，赵斌.内流式滑阀壁面压力分布可视化计算及试验验证[J].机械工程学报，2016，52(14)：196-203.
ZHANG Xiaojun，QUAN Long，ZHAO Bin. Visualization Calculation and Experimental Verification of Study Axial Flow Force on the Converged Flow Sliding Valve[J]. Journal of Mechanical Engineering，2016，52(14)：196-203.
[13]VAN DER MEULEN S， VAN IPEREN R， DEJAGER B，et al.A Validated Modular Model for Hydraulic Actuation in a Pushbelt Continuously Variable Transmission[J]. Journal of DynamicSystems，Measurement，and Control，2011，133(4)：041004.
[14]左健民.液压与气压传动[M].4版.北京：机械工业出版社，2005.
ZUO Jianmin.Hydraulic and Pneumatic Transmission [M].4 ed.Beijing：China Machine Press，2005.
[15]OKUNGBOWA N S.CFD Analysis of Steady State Flow Reaction Forces in a Rim Spool Valve[D]. Saskatoon：Univ. of Saskatchewan，2006.