Impeller of liquid pump
AssigneeMitsuba Corporation
InventorBunji Honma
Life of this patent
Estimating the term…
Abstract
An impeller for liquid pump that is capable of improving pump efficiency by modifying a shape of the impeller. An impeller is rotatably provided in a pump section of a fuel pump. A plurality of through holes are formed in the impeller so as to extend in an axial direction adjacent a circumference of a disk plate member. By doing so, a plurality of vanes and an outer-radial side ring portion are formed. An intake portion for the liquid, that is, a radial inner surface of the through hole that guides the liquid is inclined so that its rotating direction leading side is positioned to the inner-radial side, and thereby, a wider fluid guiding area is secured.
Claims20
An impeller for a liquid pump, which is provided in a pump chamber formed with an intake port and an outlet port, and rotates so that a liquid taken from the intake port can be pumped from the outlet port, comprising:
- a plurality of through holes penetrating the thickness of a disk plate member and formed at an outer periphery of the disk plate member adjacent the circumference thereof;
- and
- a plurality of vanes formed between adjacent through holes, a radial inner surface of each though hole being inclined from a thickness direction intermediate portion to an inner-radial side in order to guide a liquid to the thickness direction intermediate portion side, the inner-radial side being inclined so that a rotating direction leading side is positioned to the inner-radial side in order to secure wider area for guiding the liquid.
Dependencies are inferred from the claim text.