EP1832756B1 - Système de manipulation d'actionneur hydraulique double effet pour le déplacement d'une grille - Google Patents

Système de manipulation d'actionneur hydraulique double effet pour le déplacement d'une grille Download PDF

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Publication number
EP1832756B1
EP1832756B1 EP07004321A EP07004321A EP1832756B1 EP 1832756 B1 EP1832756 B1 EP 1832756B1 EP 07004321 A EP07004321 A EP 07004321A EP 07004321 A EP07004321 A EP 07004321A EP 1832756 B1 EP1832756 B1 EP 1832756B1
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EP
European Patent Office
Prior art keywords
oil
actuator
tank
stem
valve
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.)
Active
Application number
EP07004321A
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German (de)
English (en)
Other versions
EP1832756A2 (fr
EP1832756A3 (fr
Inventor
Luigi Pasquali
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FAAC SpA
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FAAC SpA
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Priority to PL07004321T priority Critical patent/PL1832756T3/pl
Publication of EP1832756A2 publication Critical patent/EP1832756A2/fr
Publication of EP1832756A3 publication Critical patent/EP1832756A3/fr
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Publication of EP1832756B1 publication Critical patent/EP1832756B1/fr
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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
    • F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
    • F15B7/005—With rotary or crank input
    • F15B7/006—Rotary pump input
    • 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
    • F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
    • F15B7/06—Details
    • F15B7/10—Compensation of the liquid content in a system
    • 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
    • F15B2211/20561—Type of pump reversible
    • 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
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F15B2211/3051—Cross-check valves
    • 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/61—Secondary circuits
    • F15B2211/613—Feeding circuits
    • 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
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members

Definitions

  • This invention relates to a dual-effect hydraulic actuator handling system for moving gates.
  • the stemless chamber is emptied and the stem-traversed chamber is filled. This causes excessive oil (equal to the volume of the stem) which must be returned into the tank. This is possible only through a not completely closed by-pass valve. In the contrary case, overpressures are observed upon suction which tend to 'suffocate' the pump and slow down the actuator in an anomalous manner.
  • the setting of the by-pass valve must therefore allow for this fact and it is not possible for example to take advantage of the maximum thrust of the operator, which would be useful especially with very heavy gates.
  • the setting of the by-pass valve becomes very delicate and a slight unsetting thereof, always possible especially under onerous outside conditions (for example high thermal changes), compromises the regular operation of the operator, causing jerking and blocking of the movement under load.
  • US-A-4,343,153 discloses a trim and tilt system for outboard drives on small boats, wherein a circuit arrangement according to the preamble of claim 1 is provided.
  • the general purpose of this invention is to avoid the above disadvantages by making available a handling system with dual-effect piston which would allow in a simple, economical and reliable manner compensation of the oil excess. Another purpose is to realize this without interfering with the operation of the by-pass valve.
  • FIG 1 shows diagrammatically a handling system designated as a whole by reference number 10 realized in accordance with this invention and in particular for handling of gates and the like.
  • the system has a dual-effect hydraulic actuator 11, an oil tank 12, a powered pump 13 and hydraulic circuitry 14 for control of the actuator.
  • the hydraulic circuit includes and in good part is symmetrical with two supply branches of the two chambers 11a and 11b of the actuator to control, depending on the pump direction, the opening or closing movement of the actuator (that is, respectively the leftward or rightward movement of the actuator as shown in FIG 1 ).
  • the pump is connected on each side to a respective one-way suction valve 15, 16 which draws from the tank 12 and to a respective by-pass valve 17, 18 which replaces the oil in the tank when the oil pressure exceeds the valve setting pressure.
  • Each side of the pump is also connected through a respective cutoff valve 19, 20 to one of the two actuator chambers.
  • Each cutoff valve 19, 20 is realized with a one-way valve releasable in the opposite direction through a piloting inlet 21, 22 controlled by the inlet pressure to the other cutoff valve.
  • the circuit also calls for a manual release tap 23 which connects the two chambers of the actuator directly to the tank 12 to allow manual handling of the actuator if necessary.
  • the suction valve 15 connecting the chamber 11a of the actuator opposite the stem is a one-way valve releasable by means of a piloting inlet 24 connected to the hydraulic circuit branch supplying the opposite chamber 11b of the actuator containing the stem.
  • this piloting inlet 24 is connected between the pump and the cutoff valve 20.
  • the pump In the opening step (leftward movement of the actuator) the pump is driven to suck the fluid from the left chamber 11a and shift it into the right-hand chamber 11b, in which there is the actuator stem. There will therefore be and excess of oil to be dumped into the tank.
  • pressure higher than atmospheric is generated, pressure which can reach for example 40 bar.
  • this overpressure is brought back to the suction valve 15, which is set to be unblocked by said overpressure so as to allow the excess oil arriving from the chamber 11a of the hydraulic cylinder (along the left-hand branch of the circuit) to flow into the tank through the valve 15.
  • valve 15 behaves instead like a normal one-way suction valve since the pressure in the right-hand branch of the circuit is no longer sufficient to control release of the valve 14 appropriately set. Indeed, the right-hand branch of the circuit is now the one of return and no longer of delivery. In this step, the valve 15 only allows passage of the oil from the tank to the circuit to compensate for the volume of the stem.
  • the piloted suction valve 15 allows a more satisfactory operation of the actuator in allowing return of the excess oil to the tank independently of the adjustment of the by-passes, whose setting thus influences only the adjustment of the force of the actuator.
  • the by-pass valves are set for an opening pressure safely higher than the commanded opening overpressure of the suction valve 15.
  • FIG 2 shows practical realization of the valve 15.
  • 25 and 26 are indicated the two fluid inlet or outlet ducts.
  • the valve includes a one-way cutoff realized by a ball 27 which is pushed by a spring 28 to close the passage between the two ducts 25, 26.
  • the thrust of the spring is such as to allow opening of the passage when there is the normal flow from the tank (duct 25) to the suction pump (duct 26).
  • a small piston 31 which is movable toward the ball in the opening direction against the action of a second opposing spring 29 thanks to the pressure of the fluid arriving from the duct 24.
  • the piston has one end or front pin 30 designed for thrust in opening of the ball 27.
  • a plug 32 closes the seat of the valve while packing the various parts.
  • the spring 29 is set to allow movement of the piston until opening of the ball valve when the pressure in the control duct 24 reaches overpressure due to unbalance of the transferred oil volumes as mentioned above.
  • the piloting system is completely deactivated since in the duct 24 there is not sufficient pressure to move the piston 31 and move the ball 27 in opening.
  • the valve works this way as a normal one-way valve allowing only passage of the oil from the tank to the circuit to compensate for the stem volume.
  • valve described can be easily integrated in a monobloc valve unit containing all the hydraulic circuitry of the handling system so as to have a strong and not cumbersome system. Using molding plastic for the valve of FIG 2 (except possible the small piston) this is a very economical device.
  • the device offers a series of considerable advantages compared with a complexity moderately higher than a normal suction valve. First of all it allows high quickening of the opening step (that is, of return of the stem) which now uses approximately the same time as the closing step.

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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)
  • Jib Cranes (AREA)

Claims (4)

  1. Système pour la manipulation de grilles et similaires comprenant un actionneur hydraulique double effet (11) avec une tige traversant une (11b) de ses chambres et un circuit (14) pour l'alimentation d'huile contrôlée, qui déplace alternativement l'huile entre les chambres d'actionneur (11a, 11b) pour un mouvement "d'ouverture" ou "de fermeture", avec le circuit qui comprend une pompe (13) pour le transfert de l'huile entre les chambres par le biais de vannes unidirectionnelles à coupure pilotée (19, 20), un réservoir d'huile (12) et deux vannes d'aspiration unidirectionnelles (15, 16) connectée chacune entre le réservoir (12) et un des deux côtés de la pompe (13) pour permettre l'aspiration d'huile manquante à partir du réservoir, la vanne d'aspiration (15) connectée sur le côté de la pompe correspondant à la chambre d'actionneur (11a) non traversée par la tige étant une vanne unidirectionnelle commandée avec une entrée de commande (24) connectée de manière à être ouverte par une surpression dans la branche de circuit hydraulique qui est destinée à alimenter la chambre d'actionneur (11b) traversée par la tige de manière à permettre, par le biais de ladite vanne unidirectionnelle commandée (15), l'évacuation de l'huile en excès dans le réservoir (12) durant un mouvement de l'actionneur qui est provoqué par le transfert de l'huile de la chambre sans tige (11a) à la chambre (11b) contenant la tige, caractérisé en ce que la vanne unidirectionnelle commandée (15) comprend une coupure formée par une bille de fermeture (27) poussée pour fermer par un ressort (28) et un piston de commande (31) déplacé par une pression de fluide au niveau de l'entrée de commande (24) pour se déplacer axialement, contre l'action d'un ressort d'opposition (29), pour pousser la bille de fermeture (27) vers la position ouverte de coupure.
  2. Système selon la revendication 1, caractérisé en ce que ladite vanne d'aspiration commandée (15) a une entrée de commande (24) connectée entre la pompe (13) et la vanne de coupure (20) connectée à la chambre (11b) contenant la tige.
  3. Système selon la revendication 1, caractérisé en ce qu'entre chaque côté de la pompe (13) et le réservoir (12) est connectée une vanne de dérivation respective (17, 18) pour évacuer l'huile dans le réservoir, laquelle est réglée pour une pression d'ouverture supérieure à la surpression d'ouverture contrôlée de la vanne unidirectionnelle commandée (15).
  4. Système selon la revendication 1, caractérisé en ce qu'entre les deux chambres (11a, 11b) de l'actionneur et le réservoir (12) est prédisposé un robinet d'évacuation (23) pour permettre la manipulation manuelle de l'actionneur.
EP07004321A 2006-03-10 2007-03-02 Système de manipulation d'actionneur hydraulique double effet pour le déplacement d'une grille Active EP1832756B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07004321T PL1832756T3 (pl) 2006-03-10 2007-03-02 Układ manewrowy z hydraulicznym siłownikiem dwustronnego działania do poruszania bramami

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000426A ITMI20060426A1 (it) 2006-03-10 2006-03-10 Sistema di movimentazione con attuatore idraulico a doppio effetto per la movimentazione di cancelli

Publications (3)

Publication Number Publication Date
EP1832756A2 EP1832756A2 (fr) 2007-09-12
EP1832756A3 EP1832756A3 (fr) 2009-12-30
EP1832756B1 true EP1832756B1 (fr) 2011-06-01

Family

ID=38093591

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07004321A Active EP1832756B1 (fr) 2006-03-10 2007-03-02 Système de manipulation d'actionneur hydraulique double effet pour le déplacement d'une grille

Country Status (9)

Country Link
US (1) US20070209502A1 (fr)
EP (1) EP1832756B1 (fr)
CN (1) CN101033671B (fr)
AT (1) ATE511608T1 (fr)
DK (1) DK1832756T3 (fr)
ES (1) ES2367373T3 (fr)
IT (1) ITMI20060426A1 (fr)
PL (1) PL1832756T3 (fr)
PT (1) PT1832756E (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITVI20080233A1 (it) 2008-10-08 2010-04-09 Bft S P A Sistema idraulico di azionamento per la movimentazione di cancelli motorizzati e simili
DE102011005337A1 (de) * 2011-03-10 2012-09-13 Zf Friedrichshafen Ag Antriebsanordnung zum Ausführen von Arbeitsbewegungen bei Arbeitsmaschinen
JP6093535B2 (ja) * 2012-10-10 2017-03-08 Ｋｙｂ株式会社 シリンダ駆動装置
DE102014219244A1 (de) * 2014-09-24 2016-03-24 Robert Bosch Gmbh Hydraulische Schaltung zur Versorgung eines Verbrauchers mit Differentialcharakter
DE102016215311A1 (de) * 2016-08-17 2018-02-22 Voith Patent Gmbh Hydraulischer Antrieb

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3747351A (en) * 1971-10-22 1973-07-24 Bertea Corp Hydraulic system
US4343153A (en) * 1980-03-21 1982-08-10 Eltra Corporation Anti-supercharge pressure valve
US4410056A (en) * 1981-05-27 1983-10-18 Paccar Inc. Hydraulic cab tilting system having full locking with controlled free-fall
FR2755481B1 (fr) * 1996-11-07 1998-12-24 Lohr Ind Dispositif de maintien en position et sous charge d'un verin hydraulique
DE59805882D1 (de) * 1997-07-23 2002-11-14 Hoerbiger Hydraulik Hydraulische Betätigungsanordnung
DE10261225B4 (de) * 2002-12-20 2006-11-16 Dorma Gmbh + Co. Kg Elektrohydraulischer Servotürantrieb zum Antrieb einer Tür, eines Fensters oder dergleichen
SE532772C2 (sv) * 2008-08-14 2010-04-06 Haldex Traction Ab Hydraulaktuator kontrollerande en eller flera slirkopplingar hos ett fördelningssystem
KR20110076073A (ko) * 2009-12-29 2011-07-06 볼보 컨스트럭션 이큅먼트 에이비 네가티브 컨트롤방식 유압시스템

Also Published As

Publication number Publication date
ES2367373T3 (es) 2011-11-02
DK1832756T3 (da) 2011-09-19
ATE511608T1 (de) 2011-06-15
PT1832756E (pt) 2011-09-01
US20070209502A1 (en) 2007-09-13
EP1832756A2 (fr) 2007-09-12
PL1832756T3 (pl) 2011-11-30
EP1832756A3 (fr) 2009-12-30
ITMI20060426A1 (it) 2007-09-11
CN101033671A (zh) 2007-09-12
CN101033671B (zh) 2012-06-27

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