JPS6425494U

JPS6425494U -

Info

Publication number: JPS6425494U
Application number: JP12007887U
Authority: JP
Priority date: 1987-08-05
Filing date: 1987-08-05
Publication date: 1989-02-13

Description

[Brief explanation of the drawing]

第１図乃至第８図は本考案に係る車両用燃料ポ
ンプ装置の一実施例を示し、第１図は燃料ポンプ
装置の縦断面図、第２図は第１図のＡ―Ａ線断面
図、第３図は第２図に示す環状の流路の一部を構
成するポンプカバー側流路をその平均直径円周断
面にて展開した拡大展開図、第４図は第３図のＢ
部の拡大図、第５図は再生ポンプ部の環状の流路
部分の拡大円周断面展開図、第６図は環状の流路
内部の燃料圧力分布特性図、第７図は燃料温度に
対する吐出流量の特性図、第８図はポンプ再起動
特性図であり、第９図及び第１０図は本考案の他
の実施例を示し、第９図は第１図のＡ―Ａ線断面
図、第１０図は第９図のＧ―Ｇ線拡大断面図であ
る。１……車両用燃料ポンプ装置、２……再生ポン
プ部、３……モータ部、４……ポンプケーシング
、５……ポンプカバー、６……ポンプ室、７……
インペラ、７ａ……羽根溝、７ｂ，７ｃ……側面
、８……円弧状凹部、９……円弧状凹部、９ａ…
…傾斜した底面、１０……環状の流路、１０ａ…
…第１の傾斜流路領域、１０ｂ……平坦流路領域
、１０ｃ……第２の傾斜流路領域、１１……吸込
孔、１２……吐出孔、１３……排出孔、１５……
溝、Ｃ……吸込孔基端位置、Ｄ……第１の所定位
置、Ｅ……第２の所定位置、Ｆ……吐出孔終端位
置。 1 to 8 show an embodiment of a fuel pump device for a vehicle according to the present invention, FIG. 1 is a longitudinal cross-sectional view of the fuel pump device, and FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1. , Fig. 3 is an enlarged developed view of the pump cover side flow passage, which constitutes a part of the annular flow passage shown in Fig. 2, developed in its average diameter circumferential cross section, and Fig. 4 is B of Fig. 3.
Fig. 5 is an enlarged circumferential cross-sectional development view of the annular flow path portion of the regeneration pump part, Fig. 6 is a fuel pressure distribution characteristic diagram inside the annular flow path, and Fig. 7 is a discharge versus fuel temperature. Flow rate characteristic diagram, FIG. 8 is a pump restart characteristic diagram, FIGS. 9 and 10 show other embodiments of the present invention, and FIG. 9 is a sectional view taken along the line A--A in FIG. FIG. 10 is an enlarged sectional view taken along the line GG in FIG. 9. DESCRIPTION OF SYMBOLS 1...Vehicle fuel pump device, 2...Regeneration pump section, 3...Motor section, 4...Pump casing, 5...Pump cover, 6...Pump chamber, 7...
Impeller, 7a...Blade groove, 7b, 7c...Side surface, 8...Circular recess, 9...Circular recess, 9a...
... Slanted bottom surface, 10 ... Annular flow path, 10a ...
...First inclined channel region, 10b... Flat channel region, 10c... Second inclined channel region, 11... Suction hole, 12... Discharge hole, 13... Discharge hole, 15...
Groove, C...Suction hole base end position, D...First predetermined position, E...Second predetermined position, F...Discharge hole terminal position.

Claims

[Claims for Utility Model Registration] (1) A pump having a regeneration pump section and a motor section for driving the regeneration pump section, the regeneration pump section being disposed in a pump chamber defined by a pump casing and a pump cover. an impeller operatively connected to the motor section, an annular flow path formed so as to surround a large number of blade grooves provided on the outer periphery of the impeller by arc-shaped recesses provided in the pump casing and the pump cover, respectively; and the pump cover. and a suction hole and a discharge hole provided in the pump casing and communicating with the starting and ending ends of the flow path, respectively, and a discharge hole provided in the middle of the annular flow path for discharging vapor to the outside of the pump, and a fuel tank. In the vehicle fuel pump device installed in the vehicle fuel pump device, the annular flow path is inclined toward the suction hole with respect to both side surfaces of the impeller, and the cross-sectional area of the flow path is maximum at the base end position of the suction hole. a first inclined flow path region extending from the suction hole to the first predetermined position, which is formed so as to gradually decrease toward the first predetermined position; from the first predetermined position to the second predetermined position formed such that the
a flat flow path area that reaches a predetermined position, and a flow path area that is inclined toward the discharge hole side with respect to both sides of the impeller and has a constant flow path cross-sectional area and is approximately the same as the flow path cross-sectional area of the flat flow path area. and a second inclined flow path region extending from the second predetermined position formed to the discharge hole, and the discharge hole communicates with the outside of the pump in the vicinity of the first predetermined position of the first inclined flow path region. A fuel pump device for a vehicle, characterized in that it is provided with. (2) The first inclined channel region, the flat channel region, and the second inclined channel region have respective channel region dimensions obtained by dividing the annular channel into approximately three equal parts in the circumferential direction. In addition, the depth dimension of the arc-shaped recess on the pump cover side is a at the suction hole base end position of the first inclined channel region, and b at the flat channel region.
The fuel pump device for a vehicle according to claim 1, wherein the relationship a=2.5b to 5b holds true. (3) providing grooves parallel to both side surfaces of the impeller in the vicinity of the first predetermined position on the inclined bottom surface of the pump cover-side arcuate recess that constitutes a part of the first inclined flow path region; The fuel pump device for a vehicle according to claim 1 or 2, characterized in that the discharge hole is provided in this groove.