EP0180746A1 - Pompe à débit constant - Google Patents

Pompe à débit constant Download PDF

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Publication number
EP0180746A1
EP0180746A1 EP85111894A EP85111894A EP0180746A1 EP 0180746 A1 EP0180746 A1 EP 0180746A1 EP 85111894 A EP85111894 A EP 85111894A EP 85111894 A EP85111894 A EP 85111894A EP 0180746 A1 EP0180746 A1 EP 0180746A1
Authority
EP
European Patent Office
Prior art keywords
throttle
pump
adjustable
pressure
line
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.)
Withdrawn
Application number
EP85111894A
Other languages
German (de)
English (en)
Inventor
Siegfried Mayer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0180746A1 publication Critical patent/EP0180746A1/fr
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a pump according to the preamble of the main claim.
  • two adjustable throttles are arranged in the suction line, which can be set arbitrarily using the actuating lever.
  • the purpose is to provide the vehicle with a certain driving behavior in the case of a hydrostatic transmission for a vehicle drive supplied by the pump. It is therefore necessary to temporarily operate the vehicle with two accelerators, which is relatively complicated. The effort for this facility is also relatively large.
  • the pump according to the invention with the characterizing features of the main claim has the advantage that a speed-dependent suction throttling is created that is inexpensive and easy to use.
  • a pump 10 sucks pressure medium from a container 12 via a suction line 11 and displaces it into a delivery line 13.
  • an orifice 14 non-variable flow cross-section
  • an adjustable throttle 15 are arranged between the container and the pump.
  • the actuator 16 of the throttle 15 can be adjusted with the aid of a hydraulically actuated actuating cylinder 17, on which liquid pressure acts on the one hand via a line 18, against which a regulator spring 19.
  • the line 18 leads to a 3/2-way valve 21, of which a line 22 leads to a line 23 connected to the delivery line 13.
  • a branch line 24 leads from the line 23 to one end of the directional control valve 21, on the opposite end of which an adjustable regulator spring 25 acts.
  • a line 26 leads from the directional control valve 21 to the container 12.
  • the pump 10 is driven by any drive machine 27.
  • the pump 10 can be any hydrostatic pump that can be operated by suction throttling.
  • the orifice 14 acts as a suction throttle when the throttle 15 is fully open and limits the delivery flow of the pump 10 to a constant value regardless of the pump speed.
  • the delivery pressure propagates from the delivery line 13 into the line 23 and acts via the line 24 on one end of the directional control valve 21.
  • the operating pressure in the delivery line J3 reaches that reached by the spring 25 set on the directional control valve 21, it is shifted from its switching position II into the switching position I, so that pressure medium can reach the actuating cylinder 17 via the lines 22 and 18.
  • the cross section of the throttle 15 is reduced so far against the force of the spring 19 until the flow rate reduced by the throttling just maintains the set pressure.
  • the opening cross section of the throttle 15 is then less than the flow cross section of the orifice 14.
  • the directional control valve 21 can - as shown - be operated hydraulically or via a magnet switched by a pressure switch. Aperture 14 and throttle 15 can be combined in one component. In summary, it should be pointed out again that with this suction throttle control, the power consumption of a pump is reduced when the maximum operating pressure is exceeded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Control Of Transmission Device (AREA)
EP85111894A 1984-10-17 1985-09-20 Pompe à débit constant Withdrawn EP0180746A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843438015 DE3438015A1 (de) 1984-10-17 1984-10-17 Pumpe mit konstantem foerdervolumen
DE3438015 1984-10-17

Publications (1)

Publication Number Publication Date
EP0180746A1 true EP0180746A1 (fr) 1986-05-14

Family

ID=6248095

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85111894A Withdrawn EP0180746A1 (fr) 1984-10-17 1985-09-20 Pompe à débit constant

Country Status (2)

Country Link
EP (1) EP0180746A1 (fr)
DE (1) DE3438015A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2625560B2 (ja) * 1988-09-15 1997-07-02 ツァーンラートファブリーク、フリードリッヒスハーフェン、アクチエンゲゼルシャフト ラジアルピストンポンプ
DE4320541A1 (de) * 1993-06-21 1994-12-22 Wagner Gmbh J Vorrichtung zum Verspritzen von Spritzgut unter hohem Druck
DE4409359A1 (de) * 1994-03-18 1995-09-21 Teves Gmbh Alfred Hydraulikanlage
DE19612412B4 (de) * 1996-03-28 2006-07-06 Siemens Ag Regelung für ein Druckfluid-Versorgungssystem, insbesondere für den Hochdruck in einem Kraftstoff-Einspritzsystem
DE19612413B4 (de) * 1996-03-28 2006-06-29 Siemens Ag Druckfluid-Versorgungssystem, insbesondere für ein Kraftstoff-Einspritzsystem
DE19900562C2 (de) * 1999-01-09 2000-11-16 Bosch Gmbh Robert Common-Rail-System
US6647965B1 (en) 2003-01-08 2003-11-18 Robert H. Breeden Pump assembly and method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR816198A (fr) * 1936-02-18 1937-08-02 Teves Kg Alfred Pompe à huile
GB2049823A (en) * 1979-05-22 1980-12-31 Bosch Gmbh Robert Improvements in or Relating to Systems for Producing Compressed Air
FR2539462A1 (fr) * 1983-01-13 1984-07-20 Renault Generateur de pression d'asservissement a controle de debit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR816198A (fr) * 1936-02-18 1937-08-02 Teves Kg Alfred Pompe à huile
GB2049823A (en) * 1979-05-22 1980-12-31 Bosch Gmbh Robert Improvements in or Relating to Systems for Producing Compressed Air
FR2539462A1 (fr) * 1983-01-13 1984-07-20 Renault Generateur de pression d'asservissement a controle de debit

Also Published As

Publication number Publication date
DE3438015A1 (de) 1986-04-17

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Inventor name: MAYER, SIEGFRIED