WO2008125540A1 - Soupape et pompe comprenant une telle soupape - Google Patents

Soupape et pompe comprenant une telle soupape Download PDF

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Publication number
WO2008125540A1
WO2008125540A1 PCT/EP2008/054192 EP2008054192W WO2008125540A1 WO 2008125540 A1 WO2008125540 A1 WO 2008125540A1 EP 2008054192 W EP2008054192 W EP 2008054192W WO 2008125540 A1 WO2008125540 A1 WO 2008125540A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
valve body
guide
axial
pump
Prior art date
Application number
PCT/EP2008/054192
Other languages
German (de)
English (en)
Inventor
Ngoc-Tam Vu
Original Assignee
Continental Automotive Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Automotive Gmbh filed Critical Continental Automotive Gmbh
Publication of WO2008125540A1 publication Critical patent/WO2008125540A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0452—Distribution members, e.g. valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/462—Delivery valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0452—Distribution members, e.g. valves
    • F04B1/0456—Cylindrical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0452—Distribution members, e.g. valves
    • F04B1/0461—Conical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/102—Disc valves
    • F04B53/1022—Disc valves having means for guiding the closure member axially
    • F04B53/1025—Disc valves having means for guiding the closure member axially the guiding means being provided within the valve opening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/06—Check valves with guided rigid valve members with guided stems
    • F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring

Definitions

  • the present invention relates to a valve, in particular a suction valve of a positive displacement pump.
  • the invention further relates to a pump, in particular a positive displacement pump for use in a fuel supply system of a motor vehicle.
  • valves are used in many places, for example. In the form of check valves.
  • suction valves and / or high-pressure valves are used.
  • Such a valve is usually arranged at a suitable location in the pump housing, so that the pulsating suction pressure generated by a positive displacement or radial piston pump is permanently maintained.
  • the valve has a
  • Sealing seat on which a biased by a spring valve body is seated and thereby closes the valve.
  • the fluid or fuel flowing through the valve is thus prevented from flowing. Only when the pressure on the sealing seat exceeds the force exerted by the spring, the valve body is lifted from the sealing seat and moved away from it, whereby the valve is opened.
  • valve body partially disc-shaped components are used.
  • hemispherical or conical components can be used as a valve body.
  • the environment and spatial arrangement of the suction valve is usually designed such that for the
  • Suction valve seat and the axial bias of the suction valve seat separate components are used.
  • the bias of the Suction valve seat is often done by means of a threaded pin.
  • the invention is based on the object to provide a valve for a pump with a sealing seat and with a biased against valve body available, which is constructed as compact as possible, and in which the valve body is exactly guided and defined biased. It should also be created a pump with such a valve.
  • an axial guide for a valve body which has at least one closable by the valve body axial passage.
  • the valve has a sealing seat, a valve body closing the sealing seat, an axial guide for the valve body and a spring device which biases the valve body against the sealing seat.
  • a valve may be a suction valve of the displacement or suction pump, which is part of a fuel supply system of a motor vehicle.
  • the axial passage in the region of the axial guidance of the valve body saves the arrangement of an additional closable inlet opening next to and / or separately from the valve seat, which establishes a connection between the suction side of the valve and its high-pressure side.
  • the axial guide serves to largely play-free guidance of a shaft portion of the valve body, so that the valve body is axially displaceable between two end stops, which characterize an open and a closed position of the valve.
  • the axial guide may in particular be formed by a guide bush which is arranged in a housing seat is.
  • the guide bush at the same time has an axial travel limitation for the valve body or forms such an axial path limitation.
  • the guide bushing may have a guide seat for the spring device, which biases the valve body against the sealing seat.
  • the axial guide or the guide bush can optionally have a single inlet window for pressurized fluid.
  • two, three or more inlet windows may be provided, which are arranged on the outer circumference of the guide bush. These inlet windows expediently extend in the axial direction, i. parallel to the stroke direction of the valve body whose valve stem is guided axially displaceably in the guide bushing with the inlet openings or inlet windows arranged on the outside.
  • the valve according to the invention is in particular a suction valve of a positive displacement pump.
  • This suction valve is particularly suitable for placement or arrangement in the displacement of the pump, as it is ideally coaxial with the displacer of
  • the valve has very few components.
  • the arrangement of the suction valve directly in the piston axis a very small dead volume is formed and also achieved a very high volumetric efficiency.
  • the guide bushing can ne junk serve as a guide element for the Saugschongharmonic, as a support element for the inlet window, as a stroke limiter for the valve body and / or as a spring receptacle for the valve spring.
  • FIG. 1 shows a longitudinal section of an embodiment of a valve according to the invention in the installed position
  • FIG. 2 shows in a further longitudinal section a detail view of the valve according to FIG. 1, and
  • FIG. 3 shows a perspective view of a guide bush, which is part of the valve according to FIG.
  • FIG 1 shows a longitudinal sectional view of a variant of a valve 10 in the installed position.
  • a suction valve 12 as is typically used in a high-pressure pump of a fuel supply system of an internal combustion engine (not shown).
  • the valve 10 is arranged in a cylinder housing 14 of the high-pressure pump.
  • this high-pressure pump is a suction pump 16, which has a cylindrical displacer unit 18, to which the valve 10 or suction valve 12 is arranged in a coaxial installation position.
  • a conical valve or sealing seat 20 and a sealing seat 20 occlusive valve body 22 are arranged with a conical sealing surface in the cylinder housing 14 of the suction valve 12.
  • the conical sealing surface of the valve body 22 abuts flat against the hollow cone-shaped sealing seat 20.
  • the valve body 22 is pressed against the sealing seat 20 of the cylinder housing 14 with a spring device 24.
  • This spring device 24 is formed in the illustrated embodiment by a coil spring 25.
  • a valve stem 26 of the valve body 22 is held in an axial guide 28 which is formed by a guide bush 30.
  • a cylindrical portion 32 (FIG 3) of the guide bush 30 is firmly seated in a corresponding hollow cylindrical bore of the cylinder housing 14.
  • a shoulder 34 of the guide bush 30 with a larger diameter forms an axial stop, up to which the guide bush 30 into the bore of the cylinder housing 14 can be pushed.
  • a centering collar 36 is arranged, which provides an end of the coil spring 25 has a bearing surface and at the same time ensures their centering.
  • FIG. 3 shows a possible embodiment of the guide bush 30, in whose outer circumferential surface of its cylindrical section 32 a plurality of notch-like, in plan view, semicircular recesses are arranged, which together form an axial passage 38.
  • This axial passage 38 in the form of four symmetrically arranged inlet windows 40, with the suction valve 12 open, establishes a connection between the high-pressure chamber 42 and a low-pressure chamber 50 of the suction pump 16, as illustrated by FIGS. 1 and 2.
  • the hollow cylindrical guide diameter 44 of the guide bush 30 corresponds to the outer diameter of the valve stem 26. As a result, it can slide in the axial direction largely free of play, but with as little friction as possible, so that the valve 10 opens and closes in the desired manner.
  • Guide bush 30 serves to limit the axial stroke of the valve body 22 and forms for this purpose a stop for a guide sleeve 48.
  • the coil spring 25 is at ih- rer the guide bushing 30 opposite side held by the guide sleeve 48 which is fixed to the upper end of the valve stem 26. If the guide bush 30 facing side of the guide sleeve 48 on the end face 46, so the maximum opening stroke of the suction valve 12 is reached.
  • the low-pressure chamber 50 above the valve 10 is closed to the outside by a cap 52.
  • a fuel inlet 54 opens into the low pressure chamber 50.
  • guide bush 30 is used in the embodiment shown as a guide element for the Saugventilschongeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckeckol, as a stroke limiter for the maximum opening stroke of the valve body 22 and as a spring receptacle for supporting the coil spring 25 serving as closing spring means 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

L'invention concerne une soupape (10), en particulier une soupape d'aspiration (12) d'une pompe volumétrique, comprenant un siège d'étanchéité (20), un corps de soupape (22) fermant le siège d'étanchéité (20), un guidage axial (28) pour le corps de soupape (22) et un dispositif à ressort (24), lequel précontraint le corps de soupape (22) contre le siège d'étanchéité (20). Le guidage axial (28) pour le corps de soupape (22) présente au moins un passage axial (38) pouvant être fermé par le corps de soupape.
PCT/EP2008/054192 2007-04-11 2008-04-08 Soupape et pompe comprenant une telle soupape WO2008125540A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007017122.8 2007-04-11
DE200710017122 DE102007017122A1 (de) 2007-04-11 2007-04-11 Ventil und Pumpe mit einem solchen Ventil

Publications (1)

Publication Number Publication Date
WO2008125540A1 true WO2008125540A1 (fr) 2008-10-23

Family

ID=39620340

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/054192 WO2008125540A1 (fr) 2007-04-11 2008-04-08 Soupape et pompe comprenant une telle soupape

Country Status (2)

Country Link
DE (1) DE102007017122A1 (fr)
WO (1) WO2008125540A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012072320A1 (fr) * 2010-11-30 2012-06-07 Robert Bosch Gmbh Soupape, en particulier soupape d'échappement d'une pompe à piston hydraulique

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US302978A (en) * 1884-08-05 Air-compressor
US1707017A (en) * 1926-03-29 1929-03-26 Kibele Eugene Pump valve
EP0159373A1 (fr) * 1984-04-21 1985-10-30 Dowell Schlumberger Corporation Pompe a déplacement positif avec décharge de sécurité par moyen d'un disque de rupture
US4768933A (en) * 1987-10-19 1988-09-06 Stachowiak J Edward High pressure reciprocating pump and valve assembly therefor
US5230613A (en) * 1990-07-16 1993-07-27 Diesel Technology Company Common rail fuel injection system
GB2267320A (en) * 1992-05-15 1993-12-01 Bosch Gmbh Robert Pressure-equalising delivery valve assembly.
WO1999042725A2 (fr) * 1998-02-17 1999-08-26 Continental Teves Ag & Co. Ohg Pompe a piston
WO2004109093A1 (fr) * 2003-05-22 2004-12-16 Robert Bosch Gmbh Soupape de non-retour conçue en particulier pour une pompe haute pression d'un dispositif d'injection de carburant pour un moteur a combustion interne

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB523798A (en) * 1939-01-14 1940-07-23 Greenwood & Batley Ltd Improvements in valve devices for reciprocating pumps
DE10247839A1 (de) * 2002-10-14 2004-04-22 Stein, Günter Rückschlagventil für strömbare Medien
US6695007B2 (en) * 2002-04-03 2004-02-24 Gardner Denver, Inc. Suction valve

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US302978A (en) * 1884-08-05 Air-compressor
US1707017A (en) * 1926-03-29 1929-03-26 Kibele Eugene Pump valve
EP0159373A1 (fr) * 1984-04-21 1985-10-30 Dowell Schlumberger Corporation Pompe a déplacement positif avec décharge de sécurité par moyen d'un disque de rupture
US4768933A (en) * 1987-10-19 1988-09-06 Stachowiak J Edward High pressure reciprocating pump and valve assembly therefor
US5230613A (en) * 1990-07-16 1993-07-27 Diesel Technology Company Common rail fuel injection system
GB2267320A (en) * 1992-05-15 1993-12-01 Bosch Gmbh Robert Pressure-equalising delivery valve assembly.
WO1999042725A2 (fr) * 1998-02-17 1999-08-26 Continental Teves Ag & Co. Ohg Pompe a piston
WO2004109093A1 (fr) * 2003-05-22 2004-12-16 Robert Bosch Gmbh Soupape de non-retour conçue en particulier pour une pompe haute pression d'un dispositif d'injection de carburant pour un moteur a combustion interne

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012072320A1 (fr) * 2010-11-30 2012-06-07 Robert Bosch Gmbh Soupape, en particulier soupape d'échappement d'une pompe à piston hydraulique

Also Published As

Publication number Publication date
DE102007017122A1 (de) 2008-12-18

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