Development and Improvement for the Testing System of Airplane Oil Pump Swash Plate

Three restrictors were set in hydraulic system of airplane nozzle to test the control performance of oil pump swash plate.The stable relationship between the angle of slip pump swash plate θ and system pressure P was obtained by adjusting the size of those restrictors.The experimental method and procedure for testing the torsion of slip pump swash plate were discussed based on the established experiment setup.Then an equation that described the relationship between θ and P was proposed to predict shape parameters of restrictors.Characteristic parameters about restriction and slip pump were first obtained based on the testing results of restrictors using standard slip pump.Then shape parameters of restrictors were determined after it being modified according to the comparison between test results and a standard θ-P curve.At last,the θ-P curve illustrating the required control performance of slip pump swash plate was obtained.