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J4  2009, Vol. 43 Issue (10): 1789-1793    DOI: 10.3785/j.issn.1008-973X.2009.10.008
    
Clearance leakage in high pressure pneumatic relief valve with slide pilot
XU Zhi-peng,WANG Xuan-yin,LUO Yu-xi
(State Key Laboratory of Fluid Power Transmission and Control,Zhejiang University,Hangzhou 310027,China)
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Abstract  

Aimed at the clearance leakage in high pressure pneumatic relief valve with slide pilot, a mathematical model considering the influence of leakage was established. The influences of working condition and structure parameters of pilot valve on leakage were simulated. Results showed that reducing the inlet pressure, increasing the outlet pressure or the width ratio of the throttle windows of the pilot valve could reduce the leakage significantly. The influence of leakage on the pressure response of the valve was simulated. Leakage can quicken the response speed, but it will also increase the pressure overshoot, reduce the pressure stability and even cause vibration. Simulation results are quite useful for the design and application of the valve.



Published: 29 November 2009
CLC:  TH 38.52  
Cite this article:

XU Zhi-Feng, WANG Xuan-Yin, LUO Yu-Xi. Clearance leakage in high pressure pneumatic relief valve with slide pilot. J4, 2009, 43(10): 1789-1793.

URL:

http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2009.10.008     OR     http://www.zjujournals.com/eng/Y2009/V43/I10/1789


滑阀先导式高压气动减压阀间隙泄漏特性研究

针对高压气动减压阀中滑阀式先导阀的缝隙泄漏,建立了考虑泄漏影响的数学模型,对减压阀工作条件和先导阀结构参数等影响因素进行了仿真.结果表明,降低减压阀输入压力、提高输出压力以及提高先导阀节流窗口宽度比等都能有效减少泄漏,仿真分析了泄漏对减压阀压力响应的影响,结果表明,泄漏能提高压力响应速度,但增大了压力超调且降低了压力稳定性,严重时还能导致振荡.仿真结果对于减压阀优化设计及其合理应用有较大参考价值.

[1] 吴根茂,邱敏秀,王庆丰,等. 实用电液比例技术[M]. 杭州:浙江大学出版社,1993.
[2] 余祖耀,张铁华,李壮云. 柱塞泵中柱塞与缸孔环形缝隙的泄漏流量计算[J]. 机械工程师,2000(8):3233.
YU Zu-yao, ZHANG Tie-hua, LI Zhuang-yun. Computing of leakage flow in annular clearance between piston and cylinder in piston pump [J]. Mechanical Engineer, 2000(8):3233.
[3] 王东,李壮云,朱玉泉. 柱塞泵中柱塞摩擦副泄漏流量的分析[J]. 武汉科技学院学报,2002(2):8081.
WANG Dong, LI Zhuang-yun, ZHU Yu-quan. Flow rate analysis of the piston friction in hydraulic piston pump [J]. Journal of Wuhan Institute of Science and Technology, 2002(2):8081.
[4] 徐林. 湍流工况下泵的环状间隙密封内流场分析及泄漏量计算[J]. 水泵技术,2002(2):1720.
XU Lin. Flow field analysis and leakage computing of turbulent flow in annular clearance seal of pump [J]. Water Pump Technology, 2002(2):1720.
[5] 邓晓辉,郭方中,张银峰. 回热式制冷机间隙密封泄漏率的计算及实验研究[J]. 低温工程,1995(1):4250.
DENG Xiao-hui, GUO Fang-zhong, ZHANG Yin-feng. Leakage of the clearance seal in regenerative refrigerator [J]. Cryogenics, 1995(1):4250.
[6] CHEN Yi-ze, WANG Xuan-yin, XU Zhi-peng, et al. Pilot leakages influences on the performances of extra high pressure proportional pneumatic valve [J]. Chinese Journal of Mechanical Engineering, 2005, 18(2): 208211.
[7] 王宣银,陈奕泽,刘荣,等. 超高压气动比例减压阀的设计与仿真研究[J]. 浙江大学学报:工学版,2005,39(5):614617.
WANG Xuan-yin, CHEN Yi-ze, LIU Rong, et al. Mechanics and simulation of pneumatic proportional extra-high pressure valve [J]. Journal of Zhejiang University: Engineering Science, 2005,39(5):614617.
[8] SORLI M, FIGLIOLIN G, PASTORELLI S. Dynamic model and experimental investigation of a pneumatic proportional pressure valve[J]. Mechatronics, 2004, 9(1):7886.

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