EP0093916A1 - Regeleinrichtung für eine verstellbare Pumpe - Google Patents

Regeleinrichtung für eine verstellbare Pumpe Download PDF

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Publication number
EP0093916A1
EP0093916A1 EP83103940A EP83103940A EP0093916A1 EP 0093916 A1 EP0093916 A1 EP 0093916A1 EP 83103940 A EP83103940 A EP 83103940A EP 83103940 A EP83103940 A EP 83103940A EP 0093916 A1 EP0093916 A1 EP 0093916A1
Authority
EP
European Patent Office
Prior art keywords
pressure
lever
pump
control
force
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Withdrawn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
EP83103940A
Other languages
German (de)
English (en)
French (fr)
Inventor
Gerhard Dipl.-Ing. Nonnenmacher
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 EP0093916A1 publication Critical patent/EP0093916A1/de
Withdrawn legal-status Critical Current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
    • F04B49/002—Hydraulic systems to change the pump delivery
    • 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
    • F04B49/08—Regulating by delivery pressure
    • 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
    • F04B2201/00—Pump parameters
    • F04B2201/12—Parameters of driving or driven means
    • F04B2201/1203—Power on the axis

Definitions

  • the invention relates to a control device according to the type of the main claim.
  • the stroke volume of the pump changes linearly with this pressure within a certain range of the control pressure.
  • the design can be done with a positive or negative gradient, i. H. the stroke volume increases or decreases with increasing control pressure.
  • Such a device has the disadvantage that the machine driving the pump can be overloaded.
  • the device according to the invention with the characterizing features of the main claim has the advantage that with it, depending on the working pressure Control pressure is formed so that the product of the stroke volume times the working pressure of the pump remains constant. For constant drive speed, this means constant power on the drive machine. This cannot be overloaded. It is essential that the device according to the invention generates an exact performance hyperbole and allows a simple change in the selected performance level.
  • control pressure does not have to be generated by an auxiliary pump, but can be obtained directly from the working pressure of the pump.
  • FIG. 1 shows a first exemplary embodiment in a schematic representation
  • FIG. 2 shows a diagram
  • FIG. 3 shows a second exemplary embodiment
  • FIG. 4 shows a second diagram
  • FIG. 5 shows a third exemplary embodiment again in a schematic representation.
  • 10 denotes an adjustable pump, the stroke ring 11 of which can be adjusted by means of a pressurized actuating piston 12 against a counterforce 13 for the purpose of changing the stroke of the pistons.
  • the control piston 12 receiving bore 14 opens a line 15 which comes from a valve 16.
  • the valve 16 is symbolically represented as a 3/3-way valve which has smooth or continuous transitions between the individual switching positions I-III. This is symbolically represented by the two parallel lines.
  • a line 18 branches off from line 15 and leads to the left end A of the valve spool. This is articulated on a lever 20 via a rod 19 or a plunger.
  • a line 23 leads to the valve 16 of this line 24 to a container 25 'between lines 23 and 24, a pressure limiting valve 26' is arranged.
  • the lever 20 is pivotable about a pivot point 25 '.
  • the position of the pivot point is predetermined by a roller 27 arranged on a piston rod 26.
  • the piston 28 connected to the piston rod 26 is guided in a cylinder 29 and is acted upon by the working pressure of the pump 10 against the force of a spring 31 via a line 30.
  • a control process looks like this: If, for example, the working pressure p rises at a certain stroke volume of the pump 10, the piston 28 is displaced against the force of the spring 31 and the lever arm b becomes larger. This means that the left-turning moment A times p st times b increases and outweighs the right-turning moment F 1 times a.
  • the lever 20 now pivots counterclockwise about the pivot point 25 ', as a result of which the valve 16 is moved from its neutral position II into the working position I. This allows pressure medium to flow out of the bore 14 to the container 25.
  • the spring 13 then adjusts the pump to a lower delivery rate, namely until the right-hand turning moment due to the decreasing pressure p st the lever 20 and thus that Brings valve 16 back to its previous position.
  • the valve 16 acts as a pressure reducing valve with a continuous transition between the blocking position and the working positions I and III.
  • the pressure Ph generated by the auxiliary pump 22 is converted by the valve into the pressure Pst - see the formulas above.
  • the pump 10 is set so that the product of the delivery volume and working pressure is always constant, i. H. these values form an exact hyperbola.
  • the force F 2 on the lever arm b which corresponds to p o , causes the pump to be released only at a certain pressure, e.g. B. 10 bar (preload of the spring 13); the moment F 2 times b has no influence on the further function.
  • the exemplary embodiment according to FIG. 3 differs from that according to FIG. 1 in that the controller interacts with a pump whose stroke volume decreases with increasing control pressure - see FIG. 4. This necessitates minor changes in the control device - in the same parts as before the same digits.
  • the change essentially consists only in the fact that the lever 20 is now constructed with one arm, specifically in that the pivot point 25 'lies below the effective direction of the forces F 2 and A times p st , and that the force F 2 is also greater than the force A times p st , otherwise the lever 20 would lift off the roller 27.
  • the auxiliary pressure is not generated by an auxiliary pump, but is branched off by the adjustable pump 10.
  • control pressure p st and spring force F 2 can also act on the control valve 16 from the other side.
  • the power level can be changed in a simple manner by changing the preload of the springs F (choice of the power hyperbola).
  • F 2 takes into account the value p 1 (see FIG. 4) of the pump characteristic.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Reciprocating Pumps (AREA)
EP83103940A 1982-05-08 1983-04-22 Regeleinrichtung für eine verstellbare Pumpe Withdrawn EP0093916A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3217360 1982-05-08
DE19823217360 DE3217360A1 (de) 1982-05-08 1982-05-08 Regeleinrichtung fuer eine verstellbare pumpe

Publications (1)

Publication Number Publication Date
EP0093916A1 true EP0093916A1 (de) 1983-11-16

Family

ID=6163094

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83103940A Withdrawn EP0093916A1 (de) 1982-05-08 1983-04-22 Regeleinrichtung für eine verstellbare Pumpe

Country Status (3)

Country Link
EP (1) EP0093916A1 (enrdf_load_stackoverflow)
JP (1) JPS58195088A (enrdf_load_stackoverflow)
DE (1) DE3217360A1 (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0939225A3 (de) * 1998-02-26 2000-06-14 Brueninghaus Hydromatik Gmbh Leistungsregeleinrichtung für mehrere verstellbare Hydropumpen
EP1304482A3 (de) * 2001-10-18 2005-09-07 Brueninghaus Hydromatik Gmbh Summenleistungsregler und Druckmittler
FR2931522A1 (fr) * 2008-05-26 2009-11-27 Snecma Actionneur lineaire a levier.

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6133982U (ja) * 1984-07-31 1986-03-01 三菱重工業株式会社 定動力型流量制御装置
JPS61149789U (enrdf_load_stackoverflow) * 1985-03-08 1986-09-16
JPS61184888U (enrdf_load_stackoverflow) * 1985-05-13 1986-11-18
JPS62243978A (ja) * 1986-04-14 1987-10-24 Uchida Yuatsu Kiki Kogyo Kk 可変容量形油圧ポンプの吐出量制御装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1528530A1 (de) * 1965-08-27 1969-08-21 Von Roll Ag Hydraulische Regeleinrichtung
US3669570A (en) * 1970-03-09 1972-06-13 Mannesmann Meer Ag Power regulation for fluid machines
DE2146544A1 (de) * 1971-09-17 1973-03-29 Hans Dipl Ing Molly Vorrichtung zur regelung von groessen, die durch das produkt zweier messwerte gegeben sind
US3864063A (en) * 1973-09-11 1975-02-04 Cessna Aircraft Co Automatic torque limitation control
DE2362093A1 (de) * 1973-12-14 1975-06-19 Bosch Gmbh Robert Drehmoment-regeleinrichtung fuer eine verstellbare pumpe
DE2419460A1 (de) * 1974-04-23 1975-11-06 Bosch Gmbh Robert Einrichtung zur regelung einer pumpe
USRE29333E (en) * 1969-04-23 1977-08-02 Massey-Ferguson Services N.V. Hydraulic apparatus for regulating the flow of one or more pumps
DE2942403A1 (de) * 1979-10-19 1981-04-30 Linde Ag, 6200 Wiesbaden Leistungsregeleinrichtung fuer eine kolbenpumpe

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1528530A1 (de) * 1965-08-27 1969-08-21 Von Roll Ag Hydraulische Regeleinrichtung
USRE29333E (en) * 1969-04-23 1977-08-02 Massey-Ferguson Services N.V. Hydraulic apparatus for regulating the flow of one or more pumps
US3669570A (en) * 1970-03-09 1972-06-13 Mannesmann Meer Ag Power regulation for fluid machines
DE2146544A1 (de) * 1971-09-17 1973-03-29 Hans Dipl Ing Molly Vorrichtung zur regelung von groessen, die durch das produkt zweier messwerte gegeben sind
US3864063A (en) * 1973-09-11 1975-02-04 Cessna Aircraft Co Automatic torque limitation control
DE2362093A1 (de) * 1973-12-14 1975-06-19 Bosch Gmbh Robert Drehmoment-regeleinrichtung fuer eine verstellbare pumpe
DE2419460A1 (de) * 1974-04-23 1975-11-06 Bosch Gmbh Robert Einrichtung zur regelung einer pumpe
DE2942403A1 (de) * 1979-10-19 1981-04-30 Linde Ag, 6200 Wiesbaden Leistungsregeleinrichtung fuer eine kolbenpumpe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0939225A3 (de) * 1998-02-26 2000-06-14 Brueninghaus Hydromatik Gmbh Leistungsregeleinrichtung für mehrere verstellbare Hydropumpen
EP1304482A3 (de) * 2001-10-18 2005-09-07 Brueninghaus Hydromatik Gmbh Summenleistungsregler und Druckmittler
FR2931522A1 (fr) * 2008-05-26 2009-11-27 Snecma Actionneur lineaire a levier.

Also Published As

Publication number Publication date
JPH0459471B2 (enrdf_load_stackoverflow) 1992-09-22
DE3217360A1 (de) 1983-11-10
JPS58195088A (ja) 1983-11-14

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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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17P Request for examination filed

Effective date: 19830422

AK Designated contracting states

Designated state(s): DE FR GB

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19881103

RIN1 Information on inventor provided before grant (corrected)

Inventor name: NONNENMACHER, GERHARD, DIPL.-ING.