Experimental study on spool pair characteristics of servo valves

摘要

Since the characteristics of the servo valve's spool valve pair are difficult to grasp, this paper proposes methods of testing the internal characteristics parameters of the spool pair under variable temperature conditions. Based on these methods, a series of testing systems are designed and test platforms are built, which can measure the viscous damping coefficient, coulomb friction, hydrodynamic and discharge coefficient under different high temperature conditions. The testing results could be used to offer references for the design and manufacture of the spool pair.