MEASURING THE IMPACT OF FLOW FORCE ON THE SPOOL OF A SERVO VALVE BY MEANS OF COMPUTATIONAL FLUID DYNAMICS

The development and design of servo valve spools with high performance requirements require accurately calculating the impacts on spool. During operation valve, most significant impact spool is exerted by flow force, which determined rate liquid angle deflection jet. Existing methods for magnitude force do not take into account actual shape sleeve collars, negatively affects accuracy calculations. This article develops a method using computational fluid dynamics, taking collars. presents simulation through in various positions at pressure drop across 7 MPa under no load conditions. Based results, each position consideration, jet angles are determined, structure sleeve. rates, coefficients defined characteristics built. Using data obtained characteristic, dependence resulting calculated. As result study, step-by-step developed, applicable operating modes supply values.