EP1943179B1 - Installation hydraulique - Google Patents
Installation hydraulique Download PDFInfo
- Publication number
- EP1943179B1 EP1943179B1 EP06762989A EP06762989A EP1943179B1 EP 1943179 B1 EP1943179 B1 EP 1943179B1 EP 06762989 A EP06762989 A EP 06762989A EP 06762989 A EP06762989 A EP 06762989A EP 1943179 B1 EP1943179 B1 EP 1943179B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydraulic
- hydraulic pump
- fluid
- storage device
- piston
- 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.)
- Not-in-force
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/22—Hydraulic devices or systems
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
-
- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
-
- 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
- F15B2211/20—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
- F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
-
- 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
- F15B2211/625—Accumulators
-
- 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
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/88—Control measures for saving energy
Definitions
- the invention relates to a hydraulic system, in particular for lifting and lowering of loads in forklifts with at least one working cylinder, the piston-rod unit movably guided in a housing and by means of a hydraulic pump in its one drive direction extendable and retractable in its other opposite drive direction and with a, control device for controlling the pertinent Verfahrschulen according to the features of the preamble of claim 1.
- the prior art further hydraulic systems are known in which two connected to each other on the piston side working cylinder in the form of so-called plunger cylinders are connected to a conventional hydraulic pump.
- the hydraulic pump may have two opposite directions of rotation in the form of a fixed displacement pump and thus two opposite directions of transport for the fluid medium used.
- a user-controllable control device in the manner of a control block allows the actuation of the hydraulic pump, to whose drive a conventional electric motor is used.
- the hydraulic pump removes fluid from a tank reservoir and pushes the removed fluid onto the piston side of said working cylinder unit.
- valve unit of the hydraulic pump is connected downstream for the purpose of controlling pilot valves in order to be able to produce a fluid-conducting connection between the hydraulic accumulator and respectively assignable working cylinder of the working machine here in the form of a forklift truck.
- the valve unit is a directional control valve
- the fluid leading in a switching position Away releases between a tank connection and the hydraulic pump and in the other switching position establishes a fluid-conducting connection between the hydraulic pump and the storage device, in particular the load lifting movement from the storage device can perform energy assisted, resulting in a lower drive power for the hydraulic pump with its motor result.
- the retrieved energy under high pressure level of the fluid from the storage device can also be used for faster traversing movements on the respective working cylinder, which in this respect benefits a rapid operation.
- the use of the storage device overall a harmonious, smooth operation of the entire hydraulic system can be achieved. By simply reversing the rotation of the hydraulic pump, the amount of fluid displaced during the lowering of the load from the working cylinder can be inserted into the storage device to increase its pressure levels and retrieved from there again at the next working cycle.
- the hydraulic system is used in particular for lifting and lowering of loads not shown in forklifts, such as forklifts or other industrial trucks.
- the plant has two cylinders 10 on a conventional design, which is referred to in the jargon also with plunger cylinder.
- Each working cylinder 10 has a piston-rod unit 12 which subdivides the respective working cylinder 10 substantially fluid-tightly into a piston side 14 and a rod side 16.
- the two piston sides 14 of the working cylinder 10 via a connecting line designated as a whole 18 in fluid communication with each other in connection and connected to an operator-controlled control device 20 in the manner of a control block.
- the rod sides 16 are supplied in a conventional and therefore no longer shown manner with fluid in case of need, the pertinent amount of fluid is clearly removable again from the rod side 16 as an annular space.
- a valve unit 34 is connected in the manner of a 3/2-way or switching valve, which is shown in the figure in an actuating position, in which a fluid-conducting connection between the hydraulic pump 26 and tank 24 is shown.
- a branch line 36 to a storage device 38 in the form of a hydraulic accumulator in the manner of a piston accumulator is shut off in this switching position.
- a fluid-carrying connection between branch line 36 and In the case in question, the tank connection to the tank 24 is blocked.
- the operator-controlled control device 20 is able to control both the hydraulic pump 26 and the valve unit 34 obvious.
- For operating the hydraulic pump 26 is a conventional, not shown electric motor, which is so far actuated by the control device 20.
- a measuring point 40 can also be connected to monitor system states between the control device 20 and the hydraulic pump 26 in order to carry out, for example, pressure monitoring of the system.
- pressure monitoring of the system.
- the stored energy in the memory device 38 is retrieved in the form of a high pressure level and supports the lifting movement by the memory retrieved fluid quantity is pushed to the piston side 14 of the respective working cylinder 10. In this way, a kind of energy storage can be reached, which can callably support the lifting process.
- the hydraulic system according to the invention is characterized by the use of the storage device 38 in that short system and reaction times are possible at high extension and retraction speeds for the working cylinder 10 used, and the electric drive of the hydraulic pump 26 is relieved accordingly. Furthermore, it has been found that all working movements dampened by the energy input into the memory device 38 are harmonious and thus smoothly. Despite the cost overhead for the realization of the indicated memory device, the associated energy saving is more cost-effective, especially in long-term operation than in systems without storage device. Also, the transport or capacity performance of the hydraulic pump 26 can be reduced by the use of the energy storage device 38, which in turn helps reduce the manufacturing costs.
- the hydraulic pump used have two directions of rotation; However, the two directions of rotation can also be realized by means of the electric motor. It is also possible to replace the mentioned fixed-displacement pump with a variable displacement pump and the electric motor can also be replaced by another drive device, for example by an internal combustion engine, preferably in the form of a diesel engine, a working machine or the like.
- the hydraulic system according to the invention is not limited to use with forklifts, but can preferably always be used where it is necessary to apply positional energy with the respective working cylinder. A more obvious Use is accordingly possible in working machines, such as excavators, but also in the area of elevators and handling equipment (manipulators).
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Transportation (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Fluid-Pressure Circuits (AREA)
- Forklifts And Lifting Vehicles (AREA)
Claims (5)
- Installation hydraulique, notamment pour soulever et abaisser des charges dans des chariots élévateurs, comprenant au moins un vérin (10) de travail dont le groupé piston-tige (12) est guidé de manière à pouvoir se déplacer dans une enveloppe (22) et peut sortir au moyen d'une pompe (26) hydraulique dans l'un de ses sens (30) d'entraînement et peut rentrer dans son autre sens (32) contraire d'entraînement, et comprenant un dispositif (20) de commande, pour commander les mouvements de déplacement, un dispositif (38) accumulateur étant présent qui, dans un sens (32) d'entraînement, éprouve un emmagasinage d'énergie, l'énergie emmagasinée pouvant, pour soutenir un mouvement de déplacement dans le sens (30) d'entraînement contraire, être appelée du dispositif (38) accumulateur et le dispositif (38) accumulateur étant formé d'au moins un accumulateur hydraulique, notamment d'un accumulateur à piston, qui peut être branché ou débranché au moyen d'une unité (34) de vanne pouvant être actionnée par le dispositif (20) de commande, caractérisé en ce que l'unité (34) de vanne est une vanne à voies, qui, dans une position de commutation, dégage la voie de conduite de fluide entre un raccord T de cuve et la pompe (26) hydraulique et, dans l'autre position de commutation, ménage une liaison de conduite de fluide entre la pompe (26) hydraulique et le dispositif (38) accumulateur.
- Installation hydraulique suivant la revendication 1, caractérisé en ce que l'emmagasinage d'énergie a lieu lors de l'abaissement de l'unité piston-tige (12) et l'énergie emmagasinée sert à faciliter le soulèvement.
- Installation hydraulique suivant la revendication 1 ou 2, caractérisé en ce que le dispositif (20) de commande est monté dans une liaison de conduite de fluide entre le vérin (10) de travail respectif et le côté sortie de la pompe (26) hydraulique.
- Installation hydraulique suivant la revendication 3, caractérisé en ce qu'un point (40) de mesure, notamment un point de mesure de pression dans le conduit (18) de liaison, est monté entre le dispositif (20) de commande et le côté sortie de la pompe (26) hydraulique.
- Installation hydraulique suivant l'une des revendications 1 à 4, caractérisé en ce qu'il est utilisé un agencement (10) à vérin de travail double, qui est raccordé de manière à conduire du fluide du côté (14) du piston au côté de la sortie du dispositif (20) de commande.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005052108A DE102005052108A1 (de) | 2005-11-02 | 2005-11-02 | Hydraulikanlage |
PCT/EP2006/007768 WO2007051502A1 (fr) | 2005-11-02 | 2006-08-05 | Installation hydraulique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1943179A1 EP1943179A1 (fr) | 2008-07-16 |
EP1943179B1 true EP1943179B1 (fr) | 2012-03-21 |
Family
ID=37084862
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06762989A Not-in-force EP1943179B1 (fr) | 2005-11-02 | 2006-08-05 | Installation hydraulique |
Country Status (6)
Country | Link |
---|---|
US (1) | US7891181B2 (fr) |
EP (1) | EP1943179B1 (fr) |
JP (1) | JP2009515100A (fr) |
AT (1) | ATE550290T1 (fr) |
DE (1) | DE102005052108A1 (fr) |
WO (1) | WO2007051502A1 (fr) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140373739A1 (en) * | 2009-08-18 | 2014-12-25 | Demirer Teknolojik Sistemler Sanayi Ticaret Limite Sirketi | Embodiment providing energy saving in hydraulic bending presses |
DE102009048828A1 (de) * | 2009-10-09 | 2011-04-14 | Linde Material Handling Gmbh | Hydraulische Vorrichtung und Verfahren zum Betrieb bei einer mobilen Arbeitsmaschine |
WO2011052647A1 (fr) * | 2009-10-27 | 2011-05-05 | 株式会社鶴見精機 | Dispositif flottant |
CN102241379B (zh) * | 2010-05-13 | 2014-05-07 | 济南谨恒节能技术有限公司 | 节能型行走式液压搬运机械 |
NO331866B1 (no) * | 2010-05-20 | 2012-04-23 | Nat Oilwell Varco Norway As | Anordning og fremgangsmate for a gjenvinne hydraulisk energi |
DE102010021822B3 (de) * | 2010-05-28 | 2011-07-21 | Kapelski, Rainer, 24401 | Vollständig autonome Laschplattform |
ES2645258T3 (es) * | 2011-03-28 | 2017-12-04 | Ocean Power Technologies, Inc. | Convertidor de energía de las olas con resorte hidráulico giratorio |
FR2993613B1 (fr) * | 2012-07-20 | 2014-08-15 | Poclain Hydraulics Ind | Circuit hydraulique de mise en cylindree progressive d'un appareil hydraulique |
DE102012017004A1 (de) | 2012-08-28 | 2014-03-06 | Hydac Technology Gmbh | Hydraulisches Energierückgewinnungssystem |
DE102013006204A1 (de) | 2013-04-04 | 2014-10-09 | Sennebogen Maschinenfabrik Gmbh | Betätigungseinrichtung und Arbeitsgerätschaft mit einer solchen Betätigungseinrichtung |
DE102013013690A1 (de) | 2013-08-16 | 2015-02-19 | Hydac Technology Gmbh | System zur automatischen Anpassung einer vorgebbaren Gaseintragsmenge und Betätigungseinrichtung mit einem solchen System |
DE102016002134A1 (de) * | 2016-02-23 | 2017-08-24 | Liebherr-Mining Equipment Colmar Sas | Vorrichtung zur Rekuperation von hydraulischer Energie sowie Arbeitsmaschine mit entsprechender Vorrichtung |
US11268501B1 (en) * | 2019-06-04 | 2022-03-08 | Hydraquip, Inc. | Hydraulic system for high speed reciprocating cylinders |
US11493060B2 (en) | 2019-06-04 | 2022-11-08 | Industries Mailhot Inc. | Hydraulic powering system and method of operating a hydraulic powering system |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59169401U (ja) * | 1983-04-28 | 1984-11-13 | 株式会社日立製作所 | 液圧装置 |
US4761954A (en) * | 1987-03-16 | 1988-08-09 | Dynamic Hydraulic Systems, Inc. | Fork-lift system |
JPH04219502A (ja) * | 1990-12-14 | 1992-08-10 | Kayaba Ind Co Ltd | 油圧シリンダの駆動回路 |
FI99110C (fi) * | 1993-06-01 | 1997-10-10 | Kone Oy | Menetelmä hissin käyttämiseksi ja hissikoneisto |
JP2880887B2 (ja) * | 1993-11-08 | 1999-04-12 | 株式会社島津製作所 | バッテリ式産業用車両の液圧装置 |
IT1280604B1 (it) * | 1995-11-02 | 1998-01-23 | Sme Elettronica Spa | Gruppo di potenza per l'alimentazione di attuatori idraulici |
DE19844648A1 (de) * | 1998-08-06 | 2000-02-10 | Mannesmann Rexroth Ag | Hydro-Transformator |
JP2000136806A (ja) | 1998-11-04 | 2000-05-16 | Komatsu Ltd | 圧油のエネルギー回収装置および圧油のエネルギー回収・再生装置 |
SE521308C2 (sv) * | 1999-12-27 | 2003-10-21 | Bruun Ecomate Ab | Mobil hanteringsanordning med hydraulkrets |
SE523397C2 (sv) * | 2001-05-22 | 2004-04-13 | Bruun Ecomate Ab | Mobil hanteringsanordning |
DE102004044244A1 (de) * | 2004-09-14 | 2006-03-30 | Hydac System Gmbh | Federungssystem |
-
2005
- 2005-11-02 DE DE102005052108A patent/DE102005052108A1/de not_active Withdrawn
-
2006
- 2006-08-05 AT AT06762989T patent/ATE550290T1/de active
- 2006-08-05 WO PCT/EP2006/007768 patent/WO2007051502A1/fr active Application Filing
- 2006-08-05 EP EP06762989A patent/EP1943179B1/fr not_active Not-in-force
- 2006-08-05 US US11/992,053 patent/US7891181B2/en active Active
- 2006-08-05 JP JP2008538262A patent/JP2009515100A/ja not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
JP2009515100A (ja) | 2009-04-09 |
US7891181B2 (en) | 2011-02-22 |
WO2007051502A1 (fr) | 2007-05-10 |
US20090120084A1 (en) | 2009-05-14 |
DE102005052108A1 (de) | 2007-05-03 |
ATE550290T1 (de) | 2012-04-15 |
EP1943179A1 (fr) | 2008-07-16 |
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