Simulation Research on Effect of Diametral Clearance of Spool Valve to Valve Orifice Discharge Characteristic
This paper studies the effect of spool valve diametral clearance of electro-hydraulic servo valve on orifice discharge characteristic. To ensure that the freely sliding between spool and sleeve, there must be given diametral clearance between spool and sleeve, which will have an impact on valve orifice discharge characteristic, this paper first individually sets up a 3D models of clearance from 0 to 5 μm, opening value from 0 to 40 μm, then calculates each model’s discharge on the condition that valve orifice’s inlet and outlet differential pressure is constant, finally according to the result of the discharge plots the diametral clearance curve of spool valve. The quantitative numerical relationship of diametral clearance and spool valve characteristic index is given after doing the analysis, Finally, an experimental verification of the simulation results is to be done to prove the simulation results are correct and reliable. The research of this paper provides the basic guidelines for spool valve designing and testing.
Guanglin Wang, Huifeng Wang and Jun Liu
X. D. Pan et al., "Simulation Research on Effect of Diametral Clearance of Spool Valve to Valve Orifice Discharge Characteristic", Key Engineering Materials, Vols. 392-394, pp. 184-188, 2009