Analysis of a Hydraulic Pressure Reducing Valve with a Fixed Orifice and a Pressure Sensing Chamber
This paper describes the static and dynamic characteristics of a hydraulic pressure-reducing valve with a fixed orifice and pressure-sensing chamber. The working principle and characteristics are analyzed in detail. This new type of a hydraulic pressure reducing valve with a fixed orifice and pressure sensing chamber is composed of a special body, spool valve, spring and etc. The valve body and the spool have a new kinds of structure which form a pressure-sensing chamber, and the spool has a fixed orifice, and the sensing pressure change feed back in conjunction with the spring force by a fixed orifice. The pressure of the sensing chamber and the spool valve with a fixed orifice is compensated via the area. The graphic volume can feed back the pressure to the spring and sense pressure changes. Therefore, it has the typical function of stabilized hydraulic pressure, noise elimination and vibration absorption in a compact component. The modeling and analysis are given for dynamic behavior. The simulation results show that the spool displacement has a delay time of 0.035 s before the spool moves and pressure settling time of the new compact configuration valve is less than 0.04 s, and the diameter of the fixed orifice is 0.5 mm and the volume of the pressure-sensing chamber is V1=5 mm3. The experimental results show that the compact spool type pressure reducing valve can keeps the down stream pressure a constant and the pressure can be controlled accurately.
hydraulics fixed orifice pressure sensing chamber pressure reducing valve spool
Yin Yaobao Liu Hua Li Jing Gao Zenghong
School of Mechanical Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China No 803 Research Institute, Shanghai Aerospace Bureau, 710 Yishan Road, Shanghai, 200233, China
国际会议
北戴河
英文
209-214
2007-06-06（万方平台首次上网日期，不代表论文的发表时间）