WO2012007114A2 - Groupe hydraulique - Google Patents

Groupe hydraulique Download PDF

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Publication number
WO2012007114A2
WO2012007114A2 PCT/EP2011/003295 EP2011003295W WO2012007114A2 WO 2012007114 A2 WO2012007114 A2 WO 2012007114A2 EP 2011003295 W EP2011003295 W EP 2011003295W WO 2012007114 A2 WO2012007114 A2 WO 2012007114A2
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
hydraulic unit
electric motor
unit according
sensor
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.)
Ceased
Application number
PCT/EP2011/003295
Other languages
German (de)
English (en)
Other versions
WO2012007114A3 (fr
Inventor
Stefan Arns
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
Priority to ES11730221.6T priority Critical patent/ES2573510T3/es
Priority to CN2011800343862A priority patent/CN102971532A/zh
Priority to EP11730221.6A priority patent/EP2593679B1/fr
Publication of WO2012007114A2 publication Critical patent/WO2012007114A2/fr
Publication of WO2012007114A3 publication Critical patent/WO2012007114A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • 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
    • F04B49/20—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 changing the driving speed
    • 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
    • F04B2201/1201—Rotational speed of the axis
    • 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
    • F04B2201/1204—Position of a rotating inclined plate
    • 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
    • F04B2201/1204—Position of a rotating inclined plate
    • F04B2201/12041—Angular position
    • 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
    • F04B2201/1205—Position of a non-rotating inclined plate
    • 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
    • F04B2201/1205—Position of a non-rotating inclined plate
    • F04B2201/12051—Angular position
    • 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
    • F04B2203/00—Motor parameters
    • F04B2203/02—Motor parameters of rotating electric motors
    • F04B2203/0209—Rotational speed
    • 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
    • F04B2205/00—Fluid parameters
    • F04B2205/03—Pressure in the compression chamber
    • 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
    • F04B2205/00—Fluid parameters
    • F04B2205/04—Pressure in the outlet chamber
    • 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
    • F04B2205/00—Fluid parameters
    • F04B2205/05—Pressure after the pump outlet

Definitions

  • the invention relates to a hydraulic unit according to the preamble of patent claim 1 and a method for operating a hydraulic unit.
  • the document DE 10 2007 007 005 A1 shows in FIG. 3 a hydraulic unit for supplying a consumer, in which a pump is driven by an adjustable electric motor.
  • the pump is a variable displacement pump.
  • a hydromechanical controller for a swivel angle of the variable displacement pump and a controller for the engine speed are provided.
  • variable-displacement pump pivots back. In this case, the torque of the hydraulic unit or the electric motor is lowered, resulting in energy savings.
  • the invention is based on the object to provide a hydraulic unit whose efficiency is further improved during partial load operation.
  • the hydraulic unit according to the invention has a controllable electric motor and a hydrostatic variable displacement pump which can be coupled thereto, the pivoting angle of which via a
  • hydromechanical adjusting device is adjustable.
  • the swivel angle via a swivel angle sensor and a working pressure of the variable displacement pump via a
  • Pressure sensor detectable. A speed of the electric motor is dependent on the
  • the rotational speed of the electric motor is controllable via a frequency converter.
  • the pump can be easily switched off in the event of routine interruptions (repair, tool change, break), which leads to further energy savings.
  • a frequency-controlled superordinate programmable logic controller is provided which is connected to the swivel angle sensor and to the pressure sensor. This can control the frequency converter.
  • the hydromechanical adjusting device is a pressure regulator or a combined pressure-flow regulator.
  • the electric motor is an asynchronous motor, in particular a cost-effective standard asynchronous motor.
  • the hydraulic unit according to the invention is arranged in a machine tool - in particular in its tensioning device - or in a press or in a plastic machine - in particular plastic injection molding machine - or in a loading device for a hydraulic accumulator.
  • a crawl or even a standstill with maintained working pressure is often necessary, so that the energy saving potentials according to the invention are used frequently.
  • Detecting the pressure holding operation via the pressure sensor and the swivel angle sensor is simple in terms of apparatus technology.
  • the pivoting angle is set to approximately zero. In zero-stroke operation, a qualitative and quantitative statement about wear and leakage in the hydraulic unit is possible.
  • Figure 1 is a hydraulic circuit diagram of a first embodiment of a hydraulic unit according to the invention.
  • FIG. 2 shows a hydraulic circuit diagram of a second embodiment of a hydraulic unit according to the invention.
  • Figure 1 shows a hydraulic circuit diagram of a first embodiment of a hydraulic unit according to the invention. It has a variable displacement pump 1, which has a
  • Working line 7 a (not shown) supplied to consumers.
  • an adjustable metering orifice 8 is arranged to control the consumer.
  • Hydraulic unit according to the invention is operated in an open hydraulic circuit, wherein the variable displacement pump 1 via a tank line 22 sucks pressure medium from a tank T.
  • a swivel angle of the variable displacement pump 1 is adjusted via a pressure regulator 2. This is connected via a control line 10 with the working line 7 upstream of the metering orifice 8. Also upstream of the metering orifice 8, a pressure sensor 5 is arranged, which is connected via a signal line 12 to a frequency converter 6.
  • the frequency converter 6 is connected via electrical lines 14 with a variable asynchronous motor 3.
  • the asynchronous motor 3 is connected to the variable displacement pump 1 via a shaft 16, in which a clutch 18 is arranged.
  • a swivel angle sensor 4 is arranged, whose output signal is transmitted via a signal line 20 to the frequency converter 6.
  • a pressure limiting valve 24 is arranged, in which an effective in the closing direction
  • the function of the first exemplary embodiment of the hydraulic unit according to the invention according to FIG. 1 will be explained below.
  • a working pressure is established in the working line 7, which is reported via the control line 10 to the pressure regulator 2.
  • This increases the swivel angle as the working pressure decreases while decreasing it as the working pressure increases.
  • the swivel angle is reported by the swivel angle sensor 4 via the signal line 20 to the frequency converter 6, while the working pressure is reported by the pressure sensor 5 via the signal line 12 to the frequency converter 6.
  • Figure 2 shows a hydraulic circuit diagram of a second embodiment of a hydraulic unit according to the invention. In the following, only the differences from the first exemplary embodiment according to FIG. 1 will be explained.
  • simplified frequency converter 106 is connected via a signal line 126, a programmable logic controller.
  • This controller 128 is superordinate to the frequency converter 106 and controls it.
  • the signal line 12 connected to the pressure sensor 5 and the signal line 20 connected to the swivel angle sensor 4 are connected to the controller 128.
  • Asynchronous motor 3 is transmitted from the controller 128 via the signal line 126 to the frequency converter 106.
  • variable displacement pump 1 is swung back via the pressure regulator 2. If, in this case, the swivel angle determined by the swivel angle sensor 4 drops below a threshold value, while at the same time the working pressure determined by the pressure sensor 5 in the
  • Working line 7 remains above a predetermined threshold, detects the frequency converter 6 associated electronic circuit, the pressure holding operation. In a theoretical limiting case, this can also be a zero-stroke operation in which the
  • Variable displacement pump 1 is pivoted back to zero and no further pressure medium in the Working line 7 promotes. In this case, the previously generated working pressure is maintained in the working line 7 and leaves the consumer against his load force.
  • Asynchronous motor 3 is reduced.
  • the hydraulic unit according to the invention saves energy.
  • variable displacement pump may be an axial piston pump or a radial piston pump.
  • a hydraulic unit with a controllable electric motor and with a hydrostatic variable displacement pump coupled thereto, whose pivoting angle over a
  • hydromechanical adjusting device is adjustable.
  • the swivel angle via a swivel angle sensor and a working pressure of the variable displacement pump via a
  • Pressure sensor detectable. A speed of the electric motor is dependent on the

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Hydraulic Motors (AREA)
  • Reciprocating Pumps (AREA)

Abstract

La présente invention concerne un groupe hydraulique comprenant un moteur électrique variable et une pompe à cylindrée variable hydrostatique pouvant être accouplée audit moteur électrique et dont l'angle de pivotement peut être réglé au moyen d'un dispositif de réglage hydromécanique. L'angle de pivotement peut être détecté par un capteur d'angle de pivotement et une pression de fonctionnement de la pompe à cylindrée variable peut être détectée par un capteur de pression. On peut réguler le régime du moteur électrique en fonction du capteur d'angle de pivotement et du capteur de pression.
PCT/EP2011/003295 2010-07-14 2011-07-02 Groupe hydraulique Ceased WO2012007114A2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES11730221.6T ES2573510T3 (es) 2010-07-14 2011-07-02 Grupo hidráulico
CN2011800343862A CN102971532A (zh) 2010-07-14 2011-07-02 液压机组
EP11730221.6A EP2593679B1 (fr) 2010-07-14 2011-07-02 Groupe hydraulique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010027183.7 2010-07-14
DE201010027183 DE102010027183A1 (de) 2010-07-14 2010-07-14 Hydroaggregat

Publications (2)

Publication Number Publication Date
WO2012007114A2 true WO2012007114A2 (fr) 2012-01-19
WO2012007114A3 WO2012007114A3 (fr) 2012-03-22

Family

ID=44628126

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/003295 Ceased WO2012007114A2 (fr) 2010-07-14 2011-07-02 Groupe hydraulique

Country Status (5)

Country Link
EP (1) EP2593679B1 (fr)
CN (1) CN102971532A (fr)
DE (1) DE102010027183A1 (fr)
ES (1) ES2573510T3 (fr)
WO (1) WO2012007114A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012016780B4 (de) * 2012-06-01 2021-07-22 Robert Bosch Gmbh Verfahren zum Betreiben einer Fluidpumpe
DE102016011778A1 (de) * 2016-08-11 2018-02-15 M A E Maschinen- Und Apparatebau Götzen Gmbh Hydraulische, insbesondere druckspeicherlose, Antriebsanordnung für und mit einem Verbraucher, insbesondere für Pressen, sowie Verfahren zum Betreiben einer solchen hydraulischen Antriebsanordnung
DE102024001314A1 (de) * 2024-04-24 2025-10-30 Hydac Fluidtechnik Gmbh Verfahren

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007007005A1 (de) 2007-02-08 2008-08-14 Robert Bosch Gmbh Elektrohydraulische Steueranordnung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4823552A (en) * 1987-04-29 1989-04-25 Vickers, Incorporated Failsafe electrohydraulic control system for variable displacement pump
DE4335403C1 (de) * 1993-10-18 1994-12-15 Karl Hehl Hydraulikeinrichtung
US5951258A (en) * 1997-07-09 1999-09-14 Caterpillar Inc. Torque limiting control system for a hydraulic work machine
DE10110398A1 (de) * 2001-03-03 2002-09-26 Mannesmann Rexroth Ag Verfahren zur Regelung der Druckmittelzufuhr zu einem hydraulisch betätigten Aktor
DE102005025590A1 (de) * 2005-06-03 2006-12-07 Hydac Electronic Gmbh Regelvorrichtung sowie Verfahren zum Betrieb einer Regelvorrichtung
DE102008019501B4 (de) * 2008-04-17 2019-03-21 Robert Bosch Gmbh Elektrohydraulische Steueranordnung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007007005A1 (de) 2007-02-08 2008-08-14 Robert Bosch Gmbh Elektrohydraulische Steueranordnung

Also Published As

Publication number Publication date
EP2593679B1 (fr) 2016-04-27
EP2593679A2 (fr) 2013-05-22
CN102971532A (zh) 2013-03-13
ES2573510T3 (es) 2016-06-08
WO2012007114A3 (fr) 2012-03-22
DE102010027183A1 (de) 2012-01-19

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