JPS63190588U

JPS63190588U -

Info

Publication number: JPS63190588U
Application number: JP7968487U
Authority: JP
Priority date: 1987-05-26
Filing date: 1987-05-26
Publication date: 1988-12-08

Description

[Brief explanation of the drawing]

第１図は本実施例によるタービン型燃料ポンプ
の要部拡大断面図、第２図はダスト侵入検出回路
の回路構成図、第３図ないし第５図は従来技術に
係り、第３図は燃料ポンプの縦断面図、第４図は
タービンの摩耗状況を示す斜視図、第５図は燃料
中にダストが混入したときの駆動時間に対する吐
出流量の変化を示す特性線図である。１……燃料ポンプ、２……ケーシング本体、３
……ポンプハウジング、３Ａ……インナハウジン
グ、３Ｂ……アウタハウジング、４……上カバー
、６……電動モータ、１２……タービン型ポンプ
部、１５……ポンプ室、１６……タービン、３１
……ダスト沈澱室、３２……光反射部材、３３…
…素子取付穴、３４……発光素子、３５……受光
素子、３７，３８，３９，４０……分圧抵抗、４
１……電圧比較回路、４２……警報灯。 Fig. 1 is an enlarged sectional view of the main parts of the turbine-type fuel pump according to this embodiment, Fig. 2 is a circuit configuration diagram of the dust intrusion detection circuit, Figs. 3 to 5 relate to the conventional technology, and Fig. 3 shows the fuel pump. FIG. 4 is a longitudinal cross-sectional view of the pump, FIG. 4 is a perspective view showing the state of wear of the turbine, and FIG. 5 is a characteristic diagram showing the change in discharge flow rate with respect to driving time when dust is mixed in the fuel. 1...Fuel pump, 2...Casing body, 3
... Pump housing, 3A ... Inner housing, 3B ... Outer housing, 4 ... Top cover, 6 ... Electric motor, 12 ... Turbine type pump section, 15 ... Pump chamber, 16 ... Turbine, 31
...Dust precipitation chamber, 32...Light reflecting member, 33...
...Element mounting hole, 34...Light emitting element, 35...Light receiving element, 37, 38, 39, 40...Voltage dividing resistor, 4
1... Voltage comparison circuit, 42... Warning light.

Claims

[Scope of utility model registration request]

A casing consisting of a cylindrical casing body, a pump housing that covers both ends of the casing body, and an upper cover, an electric motor provided in the casing, and a turbine provided in the pump chamber of the pump housing. In a fuel pump comprising a turbine-type pump section that discharges fuel by being rotated by a motor, a concave dust settling chamber is formed on the inner surface of an outer housing of the pump housing, and a concave dust settling chamber is formed on the lower surface of the turbine. is provided with a light reflecting member at a position facing the dust settling chamber, and the outer housing is provided with a light emitting means for irradiating light toward the light reflecting member and receiving reflected light from the light reflecting member. A dust intrusion detection device for a fuel pump, comprising a light receiving means, and a notifying means for notifying that dust has entered the dust settling chamber when the amount of light received by the light receiving means decreases.