公开(公告)号：US5716201A

公开(公告)日：1998-02-10

申请号：US509399

申请日：1995-07-31

申请人： Robert Peck ,  Martin Thomas Books ,  Francis Tokarski ,  Bernard J. Bisson ,  Raymond D. Zagranski ,  Mihir C. Desai

发明人： Robert Peck ,  Martin Thomas Books ,  Francis Tokarski ,  Bernard J. Bisson ,  Raymond D. Zagranski ,  Mihir C. Desai

IPC分类号： F01C21/08 ,  F02M37/04 ,  F04C2/344 ,  F01C21/16

CPC分类号： F02M37/045 ,  F01C21/0863 ,  F04C2/3442

摘要： A variable displacement vane pump having a vaned rotor adjustably contained within a cam member for rotation between fuel inlet and fuel discharge arcs. Adjacent vanes form enclosed fuel bucket areas which are expanded and axially-supplied with fuel in the fuel inlet arc and are contracted and axially-discharge the fuel in the fuel discharge arc. Fuel circulation is improved by providing a central recess at each vane tip and/or a central groove in the cam surface to prevent trapping, stagnation and overheating of fuel at the centerpoints of the bucket areas, which overheating can result in expansion of the vane tips, scoring of the cam surface and pump failure.

摘要翻译： 可变排量叶片泵，其具有可转动地容纳在凸轮构件内的用于在燃料入口和燃料排出弧之间旋转的叶片转子。 相邻的叶片形成封闭的燃料斗区域，其在燃料入口弧中膨胀并且轴向供应燃料并且在燃料排放电弧中收缩并轴向排出燃料。 通过在每个叶片尖端处设置中心凹槽和/或凸轮表面中的中心凹槽来改善燃料循环，以防止在铲斗区域的中心点处的燃料的捕获，停滞和过热，过热可导致叶片尖端 ，凸轮表面的刻痕和泵的故障。