EP0069612B1 - Pumpenregelung durch Ansaugdrosselung mit einbezogener Druckbegrenzung - Google Patents

Pumpenregelung durch Ansaugdrosselung mit einbezogener Druckbegrenzung Download PDF

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Publication number
EP0069612B1
EP0069612B1 EP82401071A EP82401071A EP0069612B1 EP 0069612 B1 EP0069612 B1 EP 0069612B1 EP 82401071 A EP82401071 A EP 82401071A EP 82401071 A EP82401071 A EP 82401071A EP 0069612 B1 EP0069612 B1 EP 0069612B1
Authority
EP
European Patent Office
Prior art keywords
pump
duct
constriction
pressure
chamber
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
EP82401071A
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English (en)
French (fr)
Other versions
EP0069612A1 (de
Inventor
Jean-Claude Maillochaud
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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 Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0069612A1 publication Critical patent/EP0069612A1/de
Application granted granted Critical
Publication of EP0069612B1 publication Critical patent/EP0069612B1/de
Expired legal-status Critical Current

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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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/225—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves with throttling valves or valves varying the pump inlet opening or the outlet opening
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2559—Self-controlled branched flow systems
    • Y10T137/2564—Plural inflows
    • Y10T137/2567—Alternate or successive inflows

Definitions

  • the present invention relates to pump regulators by suction throttling.
  • Regulators of this kind which can be integral with the pump or else constitute a separate element, generally comprise means of throttles movable against the action of elastic return means and interposed between a conduit connecting to a reservoir and a conduit of connection to the suction of the pump, and an element capable of displacing these throttling means and one end of which is engaged in a conduit or a connection chamber to the discharge of the pump, so that the discharge pressure acts on this element.
  • a pump fitted with a regulator of the above type necessarily includes a pressure relief valve. Indeed, one cannot be certain of the tightness of the throttle. If a leak occurs while the connection between the tank and the suction is completely throttled, there may be an increase in pressure which is limited by the pressure relief valve.
  • the pressure relief valve has hitherto been independent of the pressure regulator and generally comprises a valve which opens against elastic means when the discharge pressure of the pump reaches a safety threshold, by putting the discharge of the pump in connection with the tank.
  • Swiss patent 205,990 describes a limiter of this kind which is associated with a compressor and which, when the safety threshold is reached, isolates the suction of the compressor and simultaneously puts the discharge of the latter in communication with the tank, upstream of the pressure relief valve. As a result, the compressor suction is under vacuum and leaks can occur.
  • the present invention relates to a pressure regulator by suction throttling in which the pressure limiter is incorporated or otherwise and which avoids the drawback mentioned above.
  • the pressure regulator according to the invention is characterized in that said element ensures communication between the pipe or the connection chamber to the discharge of the pump and the connection pipe to the suction of this pump, when it has moved against the action of the elastic return means by a distance at least equal to that corresponding to a total constriction.
  • the discharge pressure which acts on the control element, tends to move the throttling means in the direction corresponding to an increase in throttling, against the action of the elastic means .
  • the throttling is total, that is to say that the communication between the reservoir and the intake of the pump is interrupted. If, due to a lack of tightness of the throttle. the discharge pressure continues to increase, the control element continues to move and ends, for a second pressure threshold, by ensuring the communication of the discharge of the pump with the suction of the latter; the pressure can therefore in no case exceed this second threshold.
  • the throttling means may be, for example, of the valve type or of the type with movable drawer in front of at least one orifice, the control element being held in abutment by the discharge pressure against the drawer or the valve.
  • control element consists of a rod which passes through a wall separating the delivery connection duct from a chamber in communication with the intake connection duct, and comprises a flat part of its length. Normally, the flat part does not completely cross the wall, so that the pump discharge is isolated from the inlet. But when the rod has moved a sufficient distance, the flat crosses the wall so that the discharge is put in communication with the inlet.
  • the pressure regulator comprises a body 1, for example made of plastic, inside of which is a recess 2.
  • the body 1 is integral with an axial inlet duct 3 and a lateral outlet conduit 4.
  • the conduits 3 and 4 both open into the recess 2 and are intended to be connected respectively to a reservoir and to the intake of the pump.
  • a high pressure connection 5, for example made of cast iron, is screwed into the end of the body 1 opposite the duct 3.
  • This connection has an axial bore 6 intended to be connected to the pump discharge, therefore at high pressure, and a bore 7 which extends the recess 2.
  • a sheath 8 for example made of metal, is embedded in an enlarged part of the recess 2 located on the side of the conduit 3.
  • a second sheath 9 is in the bore 7 by a stop ring 10 and has at its periphery a O-ring seal 11.
  • a drawer 12 which has an axial bore 13 in communication with the conduit 3 and one or more radial holes 14 opening into the bore 13.
  • a ring 15 is immobilized by a stop ring 16 on the end of the drawer 12 opposite the sheath 8.
  • a spring 17, interposed between this sheath and the ring 15, tends to slide the drawer 12 in the direction corresponding to the clearance of the holes 14 and to keep it in abutment against a push rod 18 slidingly mounted in the sleeve 9 and subjected to the action of high pressure.
  • the portion of the rod 18 located on the side of the high pressure, that is to say on the side of the bore 6, is provided with a flat 19.
  • the high pressure acts on the rod 18 which pushes the slide 12 against the action of the spring 17.
  • the holes 14 are thus more or less engaged in the sleeve 8, which throttles the suction and regulates the high pressure.
  • the holes 14 are fully engaged in the sleeve 8 so that the suction is isolated from the tank.
  • the flat 19 of the push rod 18 at a length such that in this position of the slide 12, 11 does not open into part of the bore 7 in communication with the recess 2.
  • constriction may not be perfectly tight so that the value of the high pressure may further increase, so that the rod 18 - slide 12 assembly continues to move against the action of the spring 17.
  • the flat 19 completely crosses the sheath 9 so that the discharge of the pump is placed in communication with the suction; the value of the high pressure can no longer increase. Even if the throttle is imperfect, there can no longer be a leak from the tank; the leak then takes place in the direction of this reservoir.
  • FIG. 2 is similar in general to that of FIG. 1. But the connector 5 and the sheath 9 are constituted by a single piece 20 in which are provided the axial bore 6 and an axial bore 21 housing the push rod 18. Furthermore the drawer 12 is replaced by an elastic valve 22 carried by a support 23 on which the bag 15 is mounted and on which the push rod 18 acts. If the pressure continues to increase, when the valve 22 is applied, under the action of high pressure, to a seat 24 coaxial with the conduit 3, the valve deforms elastically so as to allow the flat 19 to come out of the bore 21 and open into the recess 2.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)

Claims (3)

1. Regeleinrichtung für Pumpen mittels Drosselung der Ansaugmenge mit einer Begrenzungseinrichtung für den ausgeübten Druck, wobei die Regeleinrichtung eine gegen die Einwirkung einer federnden Rückstelleinrichtung (17) verschiebbare Drosseleinrichtung (12, 22) aufweist, welche zwischen einem Anschlußrohrstutzen (3) zu einem Behälter und einem Anschlußrohrstutzen (4) zur Saugseite der Pumpe angeordnet ist, und einen Bauteil (18) aufweist, durch den diese Drosseleinrichtung verstellt werden kann und dessen eines Ende in einen Anschlußkanal oder eine Anschlußkammer (21, 7) zur Förderseite der Pumpe eingreift, so daß der Förderdruck auf diesen Bauteil (18) einwirkt, dadurch gekennzeichnet, daß der Bauteil (18) die Verbindung zwischen dem Anschlußkanal oder der Anschlußkammer zur Förderseite der Pumpe und dem Anschlußrohrstutzen (4) zur Saugseite dieser Pumpe sicherstellt, wenn er gegen die Einwirkung der federnden Rückstelleinrichtung (17) um eine Strecke verstellt wird, die mindestens gleich derjenigen ist, die einer vollkommenen Drosselung entspricht.
2. Regeleinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Drosseleinrichtung als Klappen- oder Schieberventil ausgebildet ist, das vor wenigstens einer Öffnung verschiebbar ist, wobei dieser Bauteil durch den Förderdruck gegen den Schieber oder die Klappe in Anlage gehalten wird.
3. Regeleinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß dieser Bauteil als eine Stange (18) ausgebildet ist, welche ein Wandung durchquert, die den Anschlußkanal oder die Anschlußkammer zur Förderseite von einem in Verbindung mit dem Anschlußrohrstutzen (4) zur Saugseite stehenden Raum (2) trennt und eine Abflachung (19) an einem Abschnitt ihrer Länge aufweist.
EP82401071A 1981-06-19 1982-06-14 Pumpenregelung durch Ansaugdrosselung mit einbezogener Druckbegrenzung Expired EP0069612B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8112447 1981-06-19
FR8112447A FR2508112B1 (fr) 1981-06-19 1981-06-19 Regulateur de pompe par etranglement a l'aspiration avec limiteur de pression incorpore

Publications (2)

Publication Number Publication Date
EP0069612A1 EP0069612A1 (de) 1983-01-12
EP0069612B1 true EP0069612B1 (de) 1985-01-23

Family

ID=9259844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401071A Expired EP0069612B1 (de) 1981-06-19 1982-06-14 Pumpenregelung durch Ansaugdrosselung mit einbezogener Druckbegrenzung

Country Status (4)

Country Link
US (1) US4470427A (de)
EP (1) EP0069612B1 (de)
DE (1) DE3262034D1 (de)
FR (1) FR2508112B1 (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2543615B1 (fr) * 1983-03-30 1987-05-15 Renault Dispositif de regulation de pression, notamment pour pompe a huile de moteur a combustion interne
US4746276A (en) * 1987-02-27 1988-05-24 Dana Corporation Gear pump having conditional dry valve closure structure
WO1990002876A1 (de) * 1988-09-15 1990-03-22 Zahnradfabrik Friedrichshafen Ag Radialkolbenpumpe
DE3935325C1 (de) * 1989-10-24 1991-05-23 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
US5009576A (en) * 1990-01-08 1991-04-23 Ingersoll-Rand Company Compressor unloader controller
FR2665219B1 (fr) * 1990-07-26 1994-10-21 Bendix Europ Services Tech Pompe hydraulique a cycle alternatif.
US5701873A (en) * 1993-11-08 1997-12-30 Eidgenoessische Technische Hochschule Laboratorium Fuer Verbrennungsmotoren Und Verbrennungstechnik Control device for a filling-ratio adjusting pump
DE19625564C2 (de) * 1996-06-26 2000-06-08 Bosch Gmbh Robert Kraftstoff-Förderpumpe für eine Kraftstoff-Einspritzpumpe für Brennkraftmaschinen
US5881698A (en) * 1997-12-01 1999-03-16 Walbro Corporation Fuel pump with regulated output
WO2002069195A1 (en) * 2001-02-21 2002-09-06 United States Postal Service Systems and methods for producing and managing a tracking label in a an item delivery system
DE10248625A1 (de) * 2002-10-18 2004-04-29 Robert Bosch Gmbh Vorrichtung zur Drosselung der Flüssigkeitsmenge, die von einer Förderpumpe angesaugt wird
US7048000B2 (en) * 2004-03-03 2006-05-23 Haldex Brake Corporation Pressure reducing valve
DE102014006556B3 (de) * 2014-05-06 2015-02-19 Thomas Magnete Gmbh Pumpenaggregat mit Elektromotor

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1025222A (en) * 1909-03-18 1912-05-07 Joseph D Wallace Liquid-pressure regulator.
US1663647A (en) * 1927-02-07 1928-03-27 Alanson P Brush Energy-storage unit
US1884852A (en) * 1927-05-16 1932-10-25 British Celanese Device for delivering fluids under pressure
DE520013C (de) * 1929-03-29 1931-03-06 Heinr Korfmann Jr Saugregelventil fuer Gasverdichter
US2019723A (en) * 1933-11-25 1935-11-05 Borsig Maschb A G A Regulating device
US2124390A (en) * 1935-05-07 1938-07-19 Gen Electric Vacuum pump apparatus
FR833740A (fr) * 1937-02-16 1938-10-28 Demag Ag Procédé et dispositif pour empêcher la marche en arrière de compresseurs rotatifs en cas d'arrêt imprévu, et disposition pour obtenir un démarrage et un arrêt progressif sans charge du compresseur
CH205990A (de) * 1938-07-25 1939-07-15 Schweizerische Lokomotiv Kompressoranlage mit intermittierendem Betrieb.
CH229265A (de) * 1940-06-13 1943-10-15 Klein Schanzlin & Becker Ag Kompressoranlage.
US2916999A (en) * 1956-05-25 1959-12-15 Gen Motors Corp Variable discharge vane pump
SE331950B (de) * 1962-08-03 1971-01-18 Massey Ferguson Inc
US3473473A (en) * 1968-04-22 1969-10-21 Bendix Corp Pump control means
DE2425022A1 (de) * 1974-05-24 1975-12-04 Bosch Gmbh Robert Kolbenpumpe
US4237926A (en) * 1979-01-29 1980-12-09 Caterpillar Tractor Co. Fluid flow shutoff valve

Also Published As

Publication number Publication date
FR2508112A1 (fr) 1982-12-24
DE3262034D1 (en) 1985-03-07
FR2508112B1 (fr) 1986-05-02
EP0069612A1 (de) 1983-01-12
US4470427A (en) 1984-09-11

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