EP0084800A2 - Hydraulic installation - Google Patents

Hydraulic installation Download PDF

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Publication number
EP0084800A2
EP0084800A2 EP83100191A EP83100191A EP0084800A2 EP 0084800 A2 EP0084800 A2 EP 0084800A2 EP 83100191 A EP83100191 A EP 83100191A EP 83100191 A EP83100191 A EP 83100191A EP 0084800 A2 EP0084800 A2 EP 0084800A2
Authority
EP
European Patent Office
Prior art keywords
pressure
pump
low
turbine
main
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Withdrawn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
EP83100191A
Other languages
German (de)
French (fr)
Other versions
EP0084800A3 (en
Inventor
Horst Dr. Dipl.-Ing. Hesse
Werner Steprath
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 EP0084800A2 publication Critical patent/EP0084800A2/en
Publication of EP0084800A3 publication Critical patent/EP0084800A3/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20538—Type of pump constant capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F15B2211/20592—Combinations of pumps for supplying high and low pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/214—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being hydrotransformers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7142—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being arranged in multiple groups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/78—Control of multiple output members
    • F15B2211/781—Control of multiple output members one or more output members having priority

Definitions

  • the invention is based on a hydraulic system according to the preamble of the main claim.
  • a high-pressure circuit for the main consumers and a low-pressure circuit for secondary consumption such as e.g. B. Remote actuation of valves, actuation of clutches etc.
  • the low pressure circuit there is usually a pressure of 10 to 20 bar.
  • Low-pressure circuits can be supplied by a low-pressure pump driven by a motor next to the main pump, by pressure medium from the return line of a main consumer, which is throttled to the required low pressure, or by branching off a secondary flow from the main flow.
  • Such measures are either quite complex or difficult to install, but in any case they are lossy due to throttling or release of pressure medium via a pressure relief valve. This reduces the efficiency of a hydraulic system.
  • the hydraulic system according to the invention with the characterizing features of the main claim has the advantage that the supply device for the low pressure circuit is very simple and the power losses are low.
  • Figure 1 shows a first embodiment in a schematic representation
  • Figure 2 shows a second embodiment of the invention also in a schematic representation.
  • 10 denotes a main pump, which sucks pressure medium from a container 11 and conveys it via a high-pressure line 12 to one or more main consumers 13.
  • the pressure medium flows back from the main consumer via a line 14 to the container 11.
  • a turbine 15, for. B. a small Francis turbine arranged a low pressure pump 16, for. B. drives a gear pump.
  • This sucks pressure medium via a line 17 from the container 11 and promotes it under a low pressure of z. B. 10 to 20 bar via a low pressure line 18 to an auxiliary consumer 19, from where it flows back via a line 20 to the container.
  • the turbine 15 delivers a largely constant torque until it comes to a standstill.
  • the auxiliary circuit is supplied with the quantity of pressure medium actually used.
  • the output pressure of the low-pressure pump 16 driven by it is thus constant, and its delivery flow and speed are adjusted according to the quantity actually used.
  • a pressure relief valve is not required.
  • the turbine requires a pressure drop of 1 to 3 bar depending on the power consumption; this is independent of the pressure level of the main circuit.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Rotary Pumps (AREA)

Abstract

The hydraulic installation according to Figure 1 consists of a main utilisation (13) fed by a high-pressure pump (10) and a secondary utilisation (19) fed by a low-pressure pump (16). The low-pressure pump (16) is driven by a turbine (15) arranged in the feed line (12) of the main circuit. Both pumps supply pressure medium from a container (11), which medium flows back to the latter again in the open circuit. The low-pressure pump is expediently a constant pump, e.g. a gear pump which is driven via the turbine until its standstill with an extensively constant torque. The secondary circuit is in this manner supplied with the quantity of pressure medium actually brought. An installation of this type is cheap and causes low power losses. <IMAGE>

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Hydraulikanlage nach der Gattung des Hauptanspruchs. In bestimmten Hydraulikanlagen befinden sich nebeneinander ein Hochdruckkreis für die Hauptverbraucher und ein Niederdruckkreis für Nebenverbrauch wie z. B. Fernbetätigung von Ventilen, Betätigung von Kupplungen usw. Im Niederdruckkreis herrscht meist ein Druck von 10 bis 20 bar. Niederdruckkreise können versorgt werden durch eine von einem Motor neben der Hauptpumpe angetriebene Niederdruckpumpe, durch Druckmittel aus dem Rücklauf eines Hauptverbrauchers, der auf den erforderlichen Niederdruck angedrosselt wird oder durch Abzweigen eines Nebenstroms aus dem Hauptstrom. Derartige Maßnahmen sind entweder recht aufwendig oder schwierig zu installieren, in jedem Fall aber verlustbehaftet durch Androsseln oder Ablassen von Druckmittel über ein Druckbegrenzungsventil. Damit wird der Wirkungsgrad einer Hydraulikanlage verringert.The invention is based on a hydraulic system according to the preamble of the main claim. In certain hydraulic systems, a high-pressure circuit for the main consumers and a low-pressure circuit for secondary consumption such as e.g. B. Remote actuation of valves, actuation of clutches etc. In the low pressure circuit there is usually a pressure of 10 to 20 bar. Low-pressure circuits can be supplied by a low-pressure pump driven by a motor next to the main pump, by pressure medium from the return line of a main consumer, which is throttled to the required low pressure, or by branching off a secondary flow from the main flow. Such measures are either quite complex or difficult to install, but in any case they are lossy due to throttling or release of pressure medium via a pressure relief valve. This reduces the efficiency of a hydraulic system.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Hydraulikanlage mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß die Versorgungseinrichtung für den Niederdruckkreis sehr einfach ist und die Leistungsverluste gering sind.The hydraulic system according to the invention with the characterizing features of the main claim has the advantage that the supply device for the low pressure circuit is very simple and the power losses are low.

Zeichnungdrawing

Zwei Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 ein erstes Ausführungsbeispiel in schematischer Darstellung und Figur 2 ein zweites Ausführungsbeispiel der Erfindung ebenfalls in schematischer Darstellung.Two embodiments of the invention are shown in the drawing and explained in more detail in the following description. Figure 1 shows a first embodiment in a schematic representation and Figure 2 shows a second embodiment of the invention also in a schematic representation.

Beschreibung des AusführungsbeispielesDescription of the embodiment

In Figur 1 ist mit 10 eine Hauptpumpe bezeichnet, die Druckmittel aus einem Behälter 11 ansaugt und dieses über eine Hochdruckleitung 12 zu einem oder mehreren Hauptverbrauchern 13 fördert. Vom Hauptverbraucher fließt das Druckmittel über eine Leitung 14 zum Behälter 11 zurück. In der Hochdruckleitung 12 ist eine Turbine 15, z. B. eine kleine Francisturbine angeordnet, die eine Niederdruckpumpe 16, z. B. eine Zahnradpumpe, antreibt. Diese saugt Druckmittel über eine Leitung 17 aus dem Behälter 11 an und fördert es unter einem niedrigen Druck von z. B. 10 bis 20 bar über eine Niederdruckleitung 18 zu einem Nebenverbraucher 19, von wo es über eine Leitung 20 zum Behälter zurückfließt.In FIG. 1, 10 denotes a main pump, which sucks pressure medium from a container 11 and conveys it via a high-pressure line 12 to one or more main consumers 13. The pressure medium flows back from the main consumer via a line 14 to the container 11. In the high pressure line 12, a turbine 15, for. B. a small Francis turbine arranged a low pressure pump 16, for. B. drives a gear pump. This sucks pressure medium via a line 17 from the container 11 and promotes it under a low pressure of z. B. 10 to 20 bar via a low pressure line 18 to an auxiliary consumer 19, from where it flows back via a line 20 to the container.

Die Turbine 15 liefert bis zum Stillstand ein weitgehend konstantes Drehmoment. Der Nebenkreis wird auf diese Weise mit der tatsächlich gebrauchten Druckmittelmenge versorgt. Damit ist der Ausgangsdruck der von ihr angetriebenen Niederdruckpumpe 16 konstant, und ihr Förderstrom und ihre Drehzahl stellen sich nach der tatsächlich gebrauchten Menge ein. Ein Druckbegrenzungsventil ist nicht erforderlich. Die Turbine benötigt ein Druckgefälle von 1 bis 3 bar entsprechend der Leistungsabnahme; dieses ist unabhängig vom Druckniveau des Hauptkreises.The turbine 15 delivers a largely constant torque until it comes to a standstill. In this way, the auxiliary circuit is supplied with the quantity of pressure medium actually used. The output pressure of the low-pressure pump 16 driven by it is thus constant, and its delivery flow and speed are adjusted according to the quantity actually used. A pressure relief valve is not required. The turbine requires a pressure drop of 1 to 3 bar depending on the power consumption; this is independent of the pressure level of the main circuit.

Beim Ausführungsbeispiel nach Figur 2 sind gleiche Teile wie beim obigen mit den selben Ziffern bezeichnet. Es unterscheidet sich lediglich dadurch vom oben Beschriebenen, daß nun die Turbine 15 in der Rückleitung 14 angeordnet ist und damit durch das vom Hauptverbraucher 13 zurückströmende Druckmittel angetrieben wird.In the exemplary embodiment according to FIG. 2, the same parts as in the above are designated by the same numbers. It differs only from that described above in that the turbine 15 is now arranged in the return line 14 and is thus driven by the pressure medium flowing back from the main consumer 13.

Claims (5)

1. Hydraulikanlage mit einer Hochdruckpumpe zum Versorgen eines Hauptkreises und mit einer Niederdruckpumpe zum Versorgen eines Nebenkreises, dadurch gekennzeichnet, daß im Hauptkreis (12, 14) eine Turbine (15) angeordnet ist, die die Hilfspumpe (16) antreibt.1. Hydraulic system with a high-pressure pump for supplying a main circuit and with a low-pressure pump for supplying a secondary circuit, characterized in that a turbine (15) is arranged in the main circuit (12, 14) which drives the auxiliary pump (16). 2. Anlage nach Anspruch 1, dadurch gekennzeichnet, daß die Turbine in der Zuleitung von der Hochdruckpumpe (10) zum Hauptverbraucher (13) angeordnet ist.2. Plant according to claim 1, characterized in that the turbine is arranged in the feed line from the high pressure pump (10) to the main consumer (13). 3. Anlage nach Anspruch 1, dadurch gekennzeichnet, daß die Turbine in der Rückleitung (14) vom Hauptverbraucher zum Behälter angeordnet ist.3. Plant according to claim 1, characterized in that the turbine is arranged in the return line (14) from the main consumer to the container. 4. Anlage nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Turbine eine Francisturbinde ist.4. Plant according to one of claims 1 to 3, characterized in that the turbine is a Francis turbine. 5. Anlage nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Hilfspumpe eine Konstantpumpe ist, z. B. eine Zahnradpumpe.5. Plant according to one of claims 1 to 4, characterized in that the auxiliary pump is a constant pump, for. B. a gear pump.
EP83100191A 1982-01-26 1983-01-12 Hydraulic installation Withdrawn EP0084800A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3202351 1982-01-26
DE19823202351 DE3202351A1 (en) 1982-01-26 1982-01-26 HYDRAULIC SYSTEM

Publications (2)

Publication Number Publication Date
EP0084800A2 true EP0084800A2 (en) 1983-08-03
EP0084800A3 EP0084800A3 (en) 1984-07-25

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EP83100191A Withdrawn EP0084800A3 (en) 1982-01-26 1983-01-12 Hydraulic installation

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DE (1) DE3202351A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2570157A1 (en) * 1984-09-13 1986-03-14 Poclain Hydraulics Sa PRESSURIZED FLUID SUPPLY CIRCUIT OF TWO RECEIVER ORGANS
EP0873901A2 (en) * 1997-04-18 1998-10-28 MANNESMANN Aktiengesellschaft Drive for a mobile working apparatus
EP2843241A3 (en) * 2013-08-15 2015-04-29 CLAAS Selbstfahrende Erntemaschinen GmbH Hydraulic system
IT202000002881A1 (en) * 2020-02-13 2021-08-13 Seppi M S P A System for operating at least two users by means of a hydraulic motor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110206794B (en) * 2019-06-24 2020-04-14 三一汽车起重机械有限公司 Hydraulic wrench and engineering vehicle

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2988888A (en) * 1959-12-21 1961-06-20 Clark Equipment Co Cooling system
FR2355993A1 (en) * 1976-06-21 1978-01-20 Inst Cercetare Si Proiectare T Cooler for excavator hydraulic system - has heat exchanger air cooled by blower driven by water turbine
FR2437512A1 (en) * 1978-09-28 1980-04-25 Ppm Sa Rotatable joint for multiple hydraulic circuits - has parallel holes in inner cylinder connected to grooves in outer sleeve

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2988888A (en) * 1959-12-21 1961-06-20 Clark Equipment Co Cooling system
FR2355993A1 (en) * 1976-06-21 1978-01-20 Inst Cercetare Si Proiectare T Cooler for excavator hydraulic system - has heat exchanger air cooled by blower driven by water turbine
FR2437512A1 (en) * 1978-09-28 1980-04-25 Ppm Sa Rotatable joint for multiple hydraulic circuits - has parallel holes in inner cylinder connected to grooves in outer sleeve

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ENERGIE FLUIDE, Band 13, Nr. 67, Januar 1974, Seiten 33-39, Paris, FR. *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2570157A1 (en) * 1984-09-13 1986-03-14 Poclain Hydraulics Sa PRESSURIZED FLUID SUPPLY CIRCUIT OF TWO RECEIVER ORGANS
EP0176427A1 (en) * 1984-09-13 1986-04-02 POCLAIN HYDRAULICS Société Anonyme de droit français Fluid-pressure feeder for two receptors
EP0873901A2 (en) * 1997-04-18 1998-10-28 MANNESMANN Aktiengesellschaft Drive for a mobile working apparatus
EP0873901A3 (en) * 1997-04-18 2000-01-12 MANNESMANN Aktiengesellschaft Drive for a mobile working apparatus
US6122913A (en) * 1997-04-18 2000-09-26 Mannesmann Aktiengesellschaft Drive for a mobile operating device
EP2843241A3 (en) * 2013-08-15 2015-04-29 CLAAS Selbstfahrende Erntemaschinen GmbH Hydraulic system
IT202000002881A1 (en) * 2020-02-13 2021-08-13 Seppi M S P A System for operating at least two users by means of a hydraulic motor
ES2858506R1 (en) * 2020-02-13 2021-11-22 Seppi M Spa System to drive at least two consuming units by means of a hydraulic motor
US11364615B2 (en) 2020-02-13 2022-06-21 Seppi M. Spa System for actuating at least two consumer units by means of a hydraulic motor

Also Published As

Publication number Publication date
EP0084800A3 (en) 1984-07-25
DE3202351A1 (en) 1983-07-28

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Inventor name: STEPRATH, WERNER

Inventor name: HESSE, HORST, DR., DIPL.-ING.