Experimental and Numerical Analysis of Leakage Characteristics of Proportional Directional Valve

This article deals with the experimental and numerical analysis of leakage characteristics proportional directional valve. These describe flow through valve in region center position spool The element under investigation is a three-position four-way zero overlap feedback from position. actual sensed by an inductive sensor processed integrated electronics. By means offset on electronics, it also possible to set spool. moving spool, size direction working fluid both directions can be controlled. Internal occurs due axial radial clearances between sleeve. magnitude that occur at control edges investigated. blocked-line pressure sensitivity curve, curve are determined measurements. Depending measurement, correction then made using offset. was simulated Ansys Fluent software. Subsequently, geometry simulation model adjusted. adjustment take into account manufacturing tolerances. Finally, dependencies including effect tolerances compared measured analytically characteristics. Research background: Spool description, mathematical equations, valve, clearance. Purpose article: Effect clearance characteristic. Methods: Experimental measurements, simulation. Findings & Value added: Determining range as function