EP0016862B1 - Dispositif de commande pour système hydraulique - Google Patents

Dispositif de commande pour système hydraulique Download PDF

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Publication number
EP0016862B1
EP0016862B1 EP79104835A EP79104835A EP0016862B1 EP 0016862 B1 EP0016862 B1 EP 0016862B1 EP 79104835 A EP79104835 A EP 79104835A EP 79104835 A EP79104835 A EP 79104835A EP 0016862 B1 EP0016862 B1 EP 0016862B1
Authority
EP
European Patent Office
Prior art keywords
output signal
switching
way valve
shaper
pump
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
EP79104835A
Other languages
German (de)
English (en)
Other versions
EP0016862A1 (fr
Inventor
Richard Ing. Grad. Friedrich
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 EP0016862A1 publication Critical patent/EP0016862A1/fr
Application granted granted Critical
Publication of EP0016862B1 publication Critical patent/EP0016862B1/fr
Expired 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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08—Servomotor systems incorporating electrically operated control means
    • F15B21/087—Control strategy, e.g. with block diagram
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S60/00—Power plants
    • Y10S60/911—Fluid motor system incorporating electrical system

Definitions

  • the invention relates to a control device for a hydraulic system according to the preamble of the main claim.
  • a control device for a hydraulic system according to the preamble of the main claim.
  • the direction of the consumer is reversed, e.g. a hydraulic cylinder or a hydraulic motor - by means of a directional valve, which is operated, for example, by hand or by pressure valves or electromagnets.
  • Such actuation devices have the disadvantage that the consumer accelerates and decelerates abruptly at least when the directional valve is actuated quickly, which is undesirable in many cases.
  • the control device with the characterizing features of the main claim has the advantage that even if the directional valve designed as a multi-way valve is actuated quickly, the consumer is accelerated and decelerated smoothly, especially when switching from one consumer to another, if the pump optionally feeds several drives .
  • FIG. 1 shows a control device for a hydraulic system in a schematic representation
  • Figure 2 is a diagram.
  • An adjustable but not reversible pump 10 sucks pressure medium from a container 11 and conveys it via a delivery line 12 to a 4/3-way valve 13 with the switching positions I, II and III.
  • the directional control valve 13 is actuated electromagnetically by two magnets 14, 15.
  • Two lines 16, 17 lead from the directional control valve 13 via an electromagnetically actuated 4/2-way valve 18 to a double-acting hydraulic cylinder 19.
  • a line 20 leads from the line 16, from the line 17 a line 21 to an electromagnetically actuated 4/2-way valve 23, from which the lines lead to a hydraulic motor with changing direction of movement 24.
  • the stroke-generating member 26 of the pump 10 is adjusted with the aid of a servo motor 27.
  • An electric setpoint generator 28, e.g. a potentiometer with a hand lever is used, the output signal 28 'of which can be changed arbitrarily - that is also in a step-like manner - between plus maximum and minus maximum.
  • This rapidly changing signal 28 ' is sent to a ramp generator 29 which e.g. can be a capacitor or a choke, which forms a signal 29 'with a defined positive or negative slope.
  • an absolute value generator 30 which can be a full-wave rectifier, for example, the signal 29 'is rectified, so that the servomotor 27 always receives a signal 30' which changes between zero and a maximum according to the ability of the pump, but does not change its direction.
  • the output signal 29 'of the ramp generator 29 is additionally fed to a switching amplifier 31 and 32, for example, these can be Schmidt triggers.
  • the switching amplifier 31 responds with a small threshold value 33 - see FIG. 2 - to positive signal 29 ', the switching amplifier 32, however, also with a small threshold value 34 to negative signal 29'. This gives a directional decision for the pressure medium flow.
  • the output signals 31 'and 32' of the switching amplifiers 31, 32 excite the magnets 14, 15, the direction of the pressure medium flow is predetermined by the directional control valve 13.
  • the respective gap 35 between the signals 31 ', 32' is used to carry out further switching operations, e.g.
  • a non-reversible pump with a variable delivery rate has the character of a reversible pump.
  • the defined increase or decrease in the pressure medium flow results in a defined acceleration or deceleration of the consumers, and shocks are avoided.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)

Claims (3)

1. Dispositif de commande pour une installation hydraulique comprenant une pompe réglable non réversible (10), qui dirige le fluide sous pression vers au moins un récepteur (19, 24) auquel est associé, pour le changement de sens du mouvement, un distributeur à plusieurs voies (13) qui est commandé par l'intermédiaire d'un transmetteur électrique de valeur de consigne (28) dont le signal (28') peut être modifié arbitrairement entre un maximum positif et un maximum négatif, caractérisé en ce que le signal de sortie (28') du transmetteur de valeur de consigne (28) est transmis à un formateur de rampe électronique (29) qui forme à partir de ce signal un signal de sortie (29') possédant une pente positive ou négative définie et qui est redressé dans un formateur de valeur absolue électrique (30) et est transmis à un servo-moteur (27) pour le réglage de la pompe (10) et en ce que le signal de sortie (29') du formateur de rampe (29) est également transmis à au moins un amplificateur de commande électrique (31, 32) qui délivre un signal (31', 32') pour le réglage du distributeur à plusieurs voies (13).
2. Dispositif selon la revendication 1, caractérisé en ce que le distributeur à plusieurs voies (13) est constitué par un distributeur électromagnétique comprenant deux électro-aimants de commande (14, 15) qui sont commandés par les signaux de sortie (31', 32') de deux amplificateurs de commande (31, 32).
3. Dispositif selon la revendication 2, caractérisé en ce que les amplificateurs de commande (31, 32) répondent au signal de sortie (29') du formateur de rampe (29) chacun avec une petite valeur de seuil (34), et en ce que l'intervalle de temps (33 à 35) formé entre les signaux de sortie (31', 32') des amplificateurs de commande (31, 32) est utilisé pour d'autres processus de commande, en particulier pour diriger le fluide sous pression de la pompe vers au moins un autre récepteur (24), un distributeur (18, 23) associé à chaque récepteur étant connecté en parallèle au distributeur à plusieurs voies (13).
EP79104835A 1979-01-22 1979-12-03 Dispositif de commande pour système hydraulique Expired EP0016862B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2902264 1979-01-22
DE19792902264 DE2902264A1 (de) 1979-01-22 1979-01-22 Steuereinrichtung fuer eine hydraulikanlage

Publications (2)

Publication Number Publication Date
EP0016862A1 EP0016862A1 (fr) 1980-10-15
EP0016862B1 true EP0016862B1 (fr) 1982-02-03

Family

ID=6061085

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79104835A Expired EP0016862B1 (fr) 1979-01-22 1979-12-03 Dispositif de commande pour système hydraulique

Country Status (3)

Country Link
US (1) US4375747A (fr)
EP (1) EP0016862B1 (fr)
DE (2) DE2902264A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3266290D1 (en) * 1981-03-30 1985-10-24 Hitachi Construction Machinery Control system for hydraulic circuit means including a variable displacement pump and actuator means
DE3222008A1 (de) * 1982-06-11 1983-12-15 Sperry-Vickers Zweigniederlassung der Sperry GmbH, 6380 Bad Homburg Hydrostatischer oder pneumatischer antrieb sowie verfahren zu seinem betrieb
US4655039A (en) * 1985-06-20 1987-04-07 The Raymond Corporation Lift system
US4741159A (en) * 1986-04-08 1988-05-03 Vickers, Incorporated Power transmission
DE3716200C2 (de) * 1987-05-14 1997-08-28 Linde Ag Steuer- und Regeleinrichtung für ein hydrostatisches Antriebsaggregat und Verfahren zum Betreiben eines solchen
US5046312A (en) * 1988-07-08 1991-09-10 Kubota, Ltd. Swivel speed control circuit for working vehicle
DE4303760C2 (de) * 1993-02-09 1995-12-14 Procontrol Ag Verfahren und Vorrichtung zum hydraulischen Massenantrieb insbesondere von Spritzgiessmaschinen
DE4327313C2 (de) * 1993-08-13 2001-07-05 Mannesmann Rexroth Ag Verfahren zur Druckregelung einer hydrostatischen Maschine mit verstellbarem Fördervolumen
DE19743801A1 (de) * 1997-10-02 1999-04-08 Claas Selbstfahr Erntemasch Vorrichtung zur Steuerung eines Hydraulikzylinders in einer selbstfahrenden Erntemaschine
DE102009020046B4 (de) * 2009-05-05 2012-08-16 Kraussmaffei Technologies Gmbh Elektrisch betriebene hydraulische Antriebseinrichtung als Nebenaggregat für eine Spritzgiessmaschine
RU2534128C1 (ru) * 2013-03-28 2014-11-27 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Курганский государственный университет" Система управления движением быстроходной транспортной машины
DE102014226617A1 (de) * 2014-12-19 2016-06-23 Robert Bosch Gmbh Antriebsregelvorrichtung für einen elektro-hydraulischen Antrieb
CN107131159B (zh) * 2017-06-20 2018-09-25 北京交通大学 重力载荷下电动静液作动系统

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2643515A (en) * 1950-10-17 1953-06-30 Chester A Harsch Electric control system for expansible motor operated boom
DE1807172A1 (de) * 1968-11-06 1970-06-11 Bosch Gmbh Robert Einrichtung zur elektrohydraulischen Fernsteuerung hydraulischer Wegeventile
US3712180A (en) * 1970-11-27 1973-01-23 Gen Electric Bilateral servo controlled manipulator
US3946284A (en) * 1974-08-19 1976-03-23 Rexnord, Inc. Circuit for controlling damp shock loading
US3952509A (en) * 1975-04-10 1976-04-27 Allis-Chalmers Corporation Hydraulic system combining open center and closed center hydraulic circuits
US3956772A (en) * 1975-07-11 1976-05-18 The United States Of America As Represented By The Secretary Of The Army Control system for pre-inflation of pilot's G-suit
DE2630468A1 (de) * 1976-07-07 1978-01-12 Bosch Gmbh Robert Hydraulisches steuersystem fuer wenigstens zwei verbraucher
DE2808694C2 (de) * 1978-03-01 1986-09-25 Robert Bosch Gmbh, 7000 Stuttgart Positioniereinrichtung für einen hydraulischen Antrieb

Also Published As

Publication number Publication date
DE2962071D1 (en) 1982-03-11
EP0016862A1 (fr) 1980-10-15
DE2902264A1 (de) 1980-07-24
US4375747A (en) 1983-03-08

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