加工因素对喷油嘴喷孔几何特征的影响研究  

A Study on the Influence of Processing Factors on Nozzle Orifice Geometry

作　　者：田大洋 黄魏迪[1] 李治龙[1] 龚慧峰[1] 吴志军[1] 李理光[1,2] 

机构地区：[1]同济大学汽车学院,上海200092 [2]同济大学中德学院,上海200092

出　　处：《汽车工程》2013年第11期1043-1046,共4页Automotive Engineering

基　　金：国家自然基金项目(50946052;51076118;51006075);教育部新世纪优秀人才支持计划(NCET-10-0605);上海市青年科技启明星计划(跟踪)(11QH1402500);中央高校基本科研业务费专项资金(1700219089)资助

摘　　要：采用同步辐射高能X射线断层扫描技术,获得了不同加工因素的6只单孔喷油嘴内部结构三维模型。利用此三维模型测量了喷孔几何参数,分析不同喷孔位置、压力室容积和研磨时间对喷孔几何特征参数的影响。结果表明,研磨加工可以有效地提高喷孔入口圆角半径在喷孔圆周方向上均匀性,改善喷孔入口圆周的圆滑程度,其中以侧孔喷油嘴在大容积压力室条件下效果最为显著。By adopting computerized tomography scanning technique with synchrotron radiation X-ray, a 3D model for the inner structure of six single-hole nozzles with different technological processes are obtained, which is used to measure the geometric parameters of its orifices and then analyze the effects of orifice position, sac volume and the time of hydro erosive grinding on the geometric parameters of orifice. The results show that hydro erosive grinding can effectively improve the uniformity along circumferential direction and surface smoothness of inlet corner radius of orifice, in which its effects are more significant on that of side orifice and the orifice with large sac volume.

关 键 词：喷油嘴 喷孔几何特征 同步辐射X射线 均匀性 

分 类 号：TK403[动力工程及工程热物理—动力机械及工程]