Solid-liquid two-phase abrasive flow machining flapper servo valve nozzle large-eddy numerical simulation method

Abstract

The invention relates to a solid-liquid two-phase abrasive flow machining flapper servo valve nozzle large-eddy numerical simulation method. A specific method is as follows: (1) establishing a flapperservo valve nozzle physical model; (2) meshing the flapper servo valve nozzle physical model; (3) setting a solid-liquid two-phase abrasive flow parameter; (4) setting a flow field parameter; (5) obtaining and analyzing the large-eddy numerical simulation result. Through the method disclosed by the invention, the large-eddy numerical simulation method is applied to perform numerical simulation analysis on the solid-liquid two-phase flow machining flapper servo valve nozzle, the flapper servo valve nozzle micro-holes and side holes are regarded as a research object so as to analyze the motionrule of the abrasive flow; the inner surface quality effect rule and the micro-cutting mechanism of the solid-liquid two-phase abrasive flow machining flapper servo valve nozzle work-piece are acquired by analyzing the flapper servo valve nozzle solid-liquid abrasive flow machining.

Description

technical field [0001] The invention relates to a large vortex numerical simulation of a solid-liquid two-phase abrasive particle flow machining baffle servo valve nozzle, belonging to the technical field of mechanical engineering precision machining. Background technique [0002] With the progress of the times and the development of science, the industrial field is gradually inclined to the development of precision machining technology. Solid-liquid two-phase abrasive flow machining technology is a very representative precision machining method, which performs micro-friction through the contact between abrasive grains and workpieces. To the process of micro-cutting to achieve the smoothness of the inner surface of the workpiece, thereby improving the accuracy of the workpiece. [0003] Large eddy numerical simulation method is a simulation method to describe turbulent flow. Large eddy numerical simulation research is a method that has been rapidly developed in recent years...

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Problems solved by technology

[0004] The baffle type servo valve (nozzle inner hole size Φ0.08mm-Φ0.4mm), which is combined with the baffle to form a variable orifice, is used to realize the precise control of the displacement of the valve core, and then complete the pitching and deflection of the projectile. The control of navigation and rolling requires the nozzle of the servo valve to have high precision and low surface roughness. If there are burrs in the inner hole of the nozzle, it may cause the failure of the entire launch system or weapon system test; another example is the fuel injection of various equipment engines. The processing quality of the inner surface of the tiny hole of the nozzle (the size of the small hole of the nozzle is below Φ0.15mm) not only directly affects the atomization characteristics of the fuel injection and the penetration of the oil line, but will eventually affect the engine power performance of the equipment; the servo valve nozzle and the engine fuel injection The mouth is difficult to achieve the most ideal processing accuracy and surface quality, which seriously affects its advanced performance and limits the development of related high-performance weapons and equipment

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