Abrasive Flow Polishing Numerical Simulation Research Of Servo Valve Core Nozzle

Servo valve is the core in servo control system of a servo control element, has been widely used in the field of national life. Nozzle of the valve core is an important part in servo valve, the surface quality of nozzle will directly affect the servo valve performance,the traditional processing methods cannot ensure its quality and qualified rate. Abrasive flow processing technology provides effective solution for improving the quality of the surface of the servo valve nozzle, so the nozzle of abrasive flow machining technology has a certain theoretical significance and engineering practical significance.This article is mainly aimed at two aspects about the roughness of nozzle. Based on the basis of the theory of fluid mechanics in mixture model and discrete phase model, this paper has did numerical simulation research on movement features of complex solid liquid two phase flow field in the abrasive flow machining process, respectively from the pressure,velocity, turbulent kinetic energy, particle trajectory and particle impact wear of solid liquid two phase flow in the flow field, discussed micro grinding abrasive flow mechanism, the particle grinding results of different positions in abrasive flow machining, and different pressure, velocity, temperature on the influence of particle erosion wear rate; Based on the simulation theory, took the optimum polishing parameters for grinding and polishing of the nozzle valve core, and adopted the related testing method to abrasive flow polishing quality of the valve core of the nozzle inner surface, did the experimental analysis of abrasive flow polishing nozzle servo valve core.Through research analysis of servo valve core nozzle of abrasive flow processing technology, the surface quality of nozzle for the application of abrasive flow polishing technology and development to provide the technical support.