公开(公告)号：US20090060709A1

公开(公告)日：2009-03-05

申请号：US12203275

申请日：2008-09-03

申请人： Kenichi TOMOMATSU ,  Tadashi Hazama ,  Eiji Iwanari ,  Yuuji Nakazu ,  Hiromi Sakai

发明人： Kenichi TOMOMATSU ,  Tadashi Hazama ,  Eiji Iwanari ,  Yuuji Nakazu ,  Hiromi Sakai

IPC分类号： F01D1/12

CPC分类号： F04D5/005 ,  F04D29/188

摘要： A fuel pump has substantially coaxial outer and inner pump chambers. An impeller has partition walls correspondingly to the inner pump chamber to define inner vane grooves. A rear surface is located at a rear side in a rotative direction of each inner vane groove. At least a radially inner side of the rear surface inclines rearward in the rotative direction from the radially inner side to a radially outer side. A first line connects a radially inner end of the rear surface with a radially outer end of the rear surface. A second line radially extends from the radially inner end of the rear surface. The first line and the second line therebetween define a backward tilt angle α2, which satisfies a relationship of 30°≦α2≦80°.

摘要翻译： 燃料泵具有基本上同轴的外部和内部泵室。 叶轮具有对应于内泵室的隔壁以限定内叶片槽。 后表面位于每个内叶片槽的旋转方向的后侧。 后表面的至少径向内侧从旋转方向向后从径向内侧向径向外侧倾斜。 第一线将后表面的径向内端与后表面的径向外端连接。 第二线从后表面的径向内端部径向延伸。 第一行和第二行界定了一个后向倾斜角α2，它满足30°<=α2<= 80°的关系。