喷油嘴喷孔流道磨料流光整特性仿真与试验  

Simulation and experiment of abrasive flow finishing characteristics of nozzle jetting hole runner

作　　者：李孟楠 董志国 郑志鑫 王硕 LI Mengnan;DONG Zhiguo;ZHENG Zhixin;WANG Shuo(College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Key Laboratory of Precision Machining,Taiyuan 030024,China)

机构地区：[1]太原理工大学机械与运载工程学院,太原030024 [2]精密加工山西省重点实验室,太原030024

出　　处：《金刚石与磨料磨具工程》2023年第2期265-271,共7页Diamond & Abrasives Engineering

基　　金：山西省自然科学基金(2021-0302-123104)。

摘　　要：喷油嘴喷孔流道入口有一定入口倒角和喷孔锥度,能通过提高喷油嘴的燃油雾化效果来进一步提高发动机的效率。通过软性流体磨料对喷孔流道进行加工,使喷孔流道入口有一定的入口倒角和喷孔锥度。结果表明:在5 MPa、8 MPa的入口压力下,使用平均粒径为5μm、质量分数为25%的软性磨料加工800 s后,测得喷孔入口倒角曲率半径分别为0.018 mm和0.010 mm,喷孔流道锥度为1°和3°。在不同的入口压力下,通过polyflow软件对软性流体磨料在喷孔流道的流动特性进行了分析,并通过试验进行验证,发现仿真与试验结果误差在允许的范围内,证明了数值分析的可靠性。When there is a certain inlet chamfer and nozzle taper at the inlet of the nozzle orifice passage,the efficiency of the engine can be further improved by improving the fuel atomization effect of the nozzle.In this paper,soft fluid abrasive is used to process the orifice channel,so that the orifice channel inlet has a certain inlet chamfer and orifice taper.The test results show that under the inlet pressure of 5 MPa and 8 MPa,the average particle size is 5μm.After 800 s of processing with 25% soft abrasive,the measured radius of curvature of the orifice inlet chamfer is 0.018 mm and 0.01 mm respectively,and the taper of the orifice channel is 1° and 3°.Under different inlet pressures,this paper analyzes the flow characteristics of soft fluid abrasive in the orifice channel through the polyflow software.At the same time,the error between simulation and test results is found to be within the allowable range,which proves the reliability of numerical analysis.

关 键 词：磨料流加工 喷油嘴 POLYFLOW 锥度 倒角半径 

分 类 号：TH161[机械工程—机械制造及自动化] TH164[金属学及工艺—金属切削加工及机床] TG58