Devising quality control criteria for manufacturing control valves of the type «nozzle-flap»

This paper is a continuation of research into the causes and ways to eliminate generation self-oscillations in system automatic regulation rotations free turbine turboshaft gas engines helicopters. The study dynamic processes turbine’s GTE has shown that one reasons for development poor performance control valve type «nozzle-flap» rotation regulator’s hydraulic drive. At pump-regulator plant, criterion quality execution or repair implies geometric size parts flow rate working fluid through when flap closed meet technical requirements. As practice shows, this not enough. With approach, defects manifest themselves only during tests assemblies as part engine. proposes method examine characteristics valves such «nozzle-flap», well criteria assessing their execution. Experimental an actual regulator frequency are given. New data on outflow liquid from nozzle with have been obtained. It destruction stagnation zone tip could result increases, which negatively affects drive general. A technique proposed improve stability valve’s by increasing relative length nozzle. most informative characteristic dependence position flap. Based characteristic, it possible determine rejecting without testing them assembly