二甲醚发动机用直列隔膜式燃料泵凸轮机构设计  

The Design of Cam Mechanism in In-Line Diaphragm Fuel Pump for Dimethyl Ether Engine

作　　者：陈引[1] 郑安文[1] 郭健忠[1] 吕天浩[1] 张光德[1] 

机构地区：[1]武汉科技大学汽车与交通工程学院,湖北武汉430081

出　　处：《机械设计与制造》2013年第6期58-61,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金项目(50975212)

摘　　要：根据二甲醚发动机用直列隔膜式燃料泵的结构特点和性能要求,对其凸轮机构进行了设计。选用对心滚子直动从动件平面凸轮机构,柱塞采用五次项修正等速运动规律,建立了各阶段运动规律的数学模型,运用MATLAB软件得到了柱塞运动规律曲线及泵的瞬时流量曲线,该运动规律能保证凸轮机构工作平稳,无冲击,能实现泵的流量脉动小,甚至趋近于恒流量。进一步运用"解析法",在CAXA软件中精确生成了凸轮实际轮廓曲线,利用Pro/E软件建立了凸轮轴的三维造型,为后续研究奠定了基础。According to the structural features and performance requirements of the in-line diaphragm fuel pump for dimethyl ether engine,the cam mechanism of this pump is designed.The planar cam mechanism with translational roller follower,along the axis,is chosen,and the plunger obeys the fifth degree revised iso-velocity motion law,so the mathematical model of which is established,and the motion law curves of the plunger and instantaneous flow curve of the pump are achieved through the MATLAB software,which can ensure that the cam mechanism works steadily with no impact,and flow pulsation of the pump is very low,or even close to a constant flow.Further using the analytical method,the cam actual contour line is precisely generated in the CAXA software,and three-dimensional shape of the camshaft is created in Pro/E software,and these results laid the foundation for future research.

关 键 词：二甲醚 直列隔膜式燃料泵 凸轮机构 设计 

分 类 号：TH16[机械工程—机械制造及自动化] TK464[动力工程及工程热物理—动力机械及工程]