公开(公告)号：US4947890A

公开(公告)日：1990-08-14

申请号：US395390

申请日：1989-08-18

申请人： Mamoru Sumida ,  Hironobu Fukata ,  Takeji Yoshida ,  Osamu Matsumoto

发明人： Mamoru Sumida ,  Hironobu Fukata ,  Takeji Yoshida ,  Osamu Matsumoto

IPC分类号： F16K31/06 ,  F02M3/07 ,  F16K51/00

CPC分类号： F02M3/075 ,  Y10T137/8013

摘要： A flow control valve includes a hollow cylinder 32 having an open end and a fluid flow port 31 formed in its circumferential wall, a solenoid coil disposed around the cylinder, and a valve member 41 slidable within the cylinder in response to an amount of power supplied to the solenoid coil for adjusting an opening area of the fluid flow port to control the flow rate of the fluid flowing through the fluid flow port and the open end of the cylinder. A protective inner-diameter portion 32a formed in the open end of the cylinder is provided in association with a fluid flow path including the fluid flow port and the open end of the cylinder for preventing any foreign matters entrained in a fluid from being caught in the clearance defined between the hollow cylinder and the valve member by providing an annular clearance between the cylinder and the valve member. A reduced outer-diameter portion 44a axially partially extending from one end of the valve member or a dam plate 10, 11 disposed in the fluid flow path for defining a labyrinth flow path upstream of the fluid flow port may also be provided. At least a cylindrical wall 35, 36 having the fluid flow port of the hollow cylinder may be made of a molded resin.

摘要翻译： 流量控制阀包括具有开口端的中空圆筒32和形成在其圆周壁上的流体流动口31，围绕圆筒设置的螺线管线圈以及响应于所供给的动力量在气缸内滑动的阀构件41 到用于调节流体流动端口的开口面积的电磁线圈，以控制流过流体流动端口和气缸的开口端的流体的流量。 形成在气缸的开口端的保护内径部32a与包括流体流动端口和气缸的开口端的流体流动路径相关联地设置，用于防止夹带在流体中的任何异物被卡在 通过在气缸和阀构件之间提供环形间隙，间隙限定在中空圆筒和阀构件之间。 也可以设置从阀构件的一端轴向部分地延伸的减小的外径部分44a或设置在流体流动路径中用于限定流体流动端口上游的迷宫式流动路径的挡板10,11。 至少具有中空圆柱体的流体流动端口的圆柱形壁35,36可以由模制树脂制成。