公开(公告)号：US4872806A

公开(公告)日：1989-10-10

申请号：US194517

申请日：1988-05-16

申请人： Yutaka Yamada ,  Tadashi Kozawa ,  Naohiro Natsume ,  Hirofumi Komatsubara

发明人： Yutaka Yamada ,  Tadashi Kozawa ,  Naohiro Natsume ,  Hirofumi Komatsubara

IPC分类号： F04D29/18 ,  F04D29/22

CPC分类号： F04D29/188 ,  F04D29/2266 ,  F05B2260/304 ,  F05B2260/305

摘要： A centrifugal pump of the vortex-flow type includes a pump housing defining therein an arcuate pump chamber in surrounding relationship with a central sealed chamber, and a disc-like impeller rotatably and axially movably assembled within the pump housing and having opposite end faces each forming a close clearance with a corresponding internal end wall of the pump housing between the sealed and pump chambers, the impeller having on either end face of the rim portion thereof a plurality of circumferentially equally spaced vane grooves which cooperate with the pump chamber to produce a discharge pressure therein and being formed with at least one pressure balancing hole extending axially therethrough in the interior of the sealed chamber. The impeller is formed at an intermediate annular portion thereof with a plurality of circumferentially equally spaced axial holes which are opposed to the internal end walls of the pump housing, and the internal end walls of the pump housing are each formed with an arcuate groove which is arranged in surrounding relationship with the sealed chamber and corresponds with the axial holes of the impeller.

摘要翻译： 涡流式离心泵包括泵壳体，其中限定有与中心密封室围成关系的弓形泵室，以及可旋转和轴向可移动地组装在泵壳体内并具有各自形成的相对端面的圆盘状叶轮 与泵壳体的相应的内端壁在密封泵室和泵室之间的紧密间隙，叶轮在其边缘部分的任一端面上具有多个周向等间距的叶片槽，其与泵室协作以产生排放 并且在其中形成有至少一个在密封室的内部中轴向延伸穿过的压力平衡孔。 叶轮在其中间环形部分处形成有与泵壳体的内端壁相对的多个周向等间隔开的轴向孔，并且泵壳体的内端壁各自形成有弓形槽， 与密封室围成关系，与叶轮的轴向孔对应。

公开(公告)号：US4854830A

公开(公告)日：1989-08-08

申请号：US187516

申请日：1988-04-28

申请人： Tadashi Kozawa ,  Naohiro Natsume ,  Hirofumi Komatsubara ,  Yasunori Takaku ,  Kiyoshi Kato ,  Seiichi Harada

发明人： Tadashi Kozawa ,  Naohiro Natsume ,  Hirofumi Komatsubara ,  Yasunori Takaku ,  Kiyoshi Kato ,  Seiichi Harada

IPC分类号： F02M37/04 ,  F02M37/18 ,  F04D5/00 ,  F04D29/18 ,  F04D29/22 ,  F04B39/00

CPC分类号： F04D29/188 ,  F02M37/048 ,  F02M37/18 ,  F04D29/2266 ,  F04D5/002 ,  F04D5/006 ,  F05B2260/304

摘要： A motor-driven fuel pump including a motor section provided with a driving motor, and a pump section arranged below the motor section and provided with an impeller to be driven by the driving motor. A plurality of pressure compensation hollows are formed on opposite surfaces of a sealing portion of the impeller, and a plurality of communication holes are formed through the sealing portion for communicating the pressure compensation hollows. In another aspect, a plurality of pressure compensation passages are provided to be communicated to a higher pressure side of either a pump chamber defined around outer peripheral vanes of the impeller and a fuel well for receiving a fuel leaked along a sealing portion of the impeller.

摘要翻译： 一种电动燃料泵，包括设置有驱动电动机的电动机部分和布置在电动机部分下方并具有由驱动电动机驱动的叶轮的泵部分。 在叶轮的密封部分的相对表面上形成多个压力补偿空腔，并且通过密封部分形成多个连通孔，用于连通压力补偿空腔。 在另一方面，多个压力补偿通道设置成连通到围绕叶轮的外围叶片限定的泵室的较高压力侧，以及用于接收沿着叶轮的密封部分泄漏的燃料的燃料井。