EP1593858A2 - Système hydraulique pour véhicules de manutention - Google Patents

Système hydraulique pour véhicules de manutention Download PDF

Info

Publication number
EP1593858A2
EP1593858A2 EP05008201A EP05008201A EP1593858A2 EP 1593858 A2 EP1593858 A2 EP 1593858A2 EP 05008201 A EP05008201 A EP 05008201A EP 05008201 A EP05008201 A EP 05008201A EP 1593858 A2 EP1593858 A2 EP 1593858A2
Authority
EP
European Patent Office
Prior art keywords
hydraulic system
hydraulic
filter
oil
hydraulic oil
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.)
Granted
Application number
EP05008201A
Other languages
German (de)
English (en)
Other versions
EP1593858B1 (fr
EP1593858A3 (fr
Inventor
Wilhelm Kräutler
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.)
Liebherr Werk Nenzing GmbH
Original Assignee
Liebherr Werk Nenzing 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 Liebherr Werk Nenzing GmbH filed Critical Liebherr Werk Nenzing GmbH
Publication of EP1593858A2 publication Critical patent/EP1593858A2/fr
Publication of EP1593858A3 publication Critical patent/EP1593858A3/fr
Application granted granted Critical
Publication of EP1593858B1 publication Critical patent/EP1593858B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering

Definitions

  • the invention relates to a hydraulic system for a material handling vehicle.
  • Reachstackers are being used increasingly recently as industrial trucks. Reachstackers are rubber-tired vehicles with diesel engine and driver's cab. They are capable of handling loads, especially containers, trailers, sheet metal coils, general cargo etc. to transport and stack.
  • Previously known Reachstacker are with a on the telescopic arm as a load receiving means arranged container spreader equipped, d. H. lifting and lowering of the spreader takes place only via the telescopic arm. The lifting and lowering movement of the telescopic arm and the movement of the Spreaders take place hydraulically.
  • Reachstackers can be fully loaded containers handle or stack in multiple rows one behind the other and one above the other.
  • the cabs are fixed on the vehicle in the rear part or movably connected to the frame, giving the driver a good view of the telescopic arm firmly connected container spreader has.
  • Hydraulic systems as used in industrial trucks need a high-purity printing medium to damage its components to avoid.
  • the cleaning of the pressure medium is therefore necessary to to ensure proper functioning of the hydraulic system.
  • High-pressure or return filter systems to use, the complete Clean hydraulic oil flow of particles> 10 ⁇ m.
  • the object of the invention is to provide a hydraulic system to the hand, in which the occurring during wear of the hydraulic components in the hydraulic system Pollution particles can be removed as quantitatively as possible.
  • a hydraulic system is given to the hand, that in industrial trucks is to use and a filter system for cleaning the hydraulic oil flow by filtering off particles, furthermore a device, for example for removing a defined and constant partial flow of the hydraulic oil and in which at least one filter element for filtering the hydraulic oil partial flow present is.
  • This is a bypass filter system, with which a defined and constant flow of oil is removed, which depends on the filter element used is tuned.
  • This hydraulic oil flow is in the filter of dirt particles cleaned and returned to the hydraulic system at a lower pressure level.
  • a clogging indicator be formed by a pressure gauge for measuring the filter adjacent dynamic pressure is used.
  • a logging unit for receiving the dynamic pressure of the Filters provided as a function of time.
  • This can for example in a Memory consist of a connected monitoring unit in which the corresponding pressure values are stored as a function of time.
  • a differential unit can record the speed of the filter surge change become.
  • the speed of the filter back pressure change corresponds a pollution speed.
  • a sudden increase in this rate of pollution again indicates damage in the hydraulic system.
  • By an appropriate monitoring of the pollution speed and Setting appropriate limits can output a beep in case be that the pollution rate exceeds a predetermined value.
  • a corresponding signal can be generated in the driver's cabin by means of a warning lamp are displayed.
  • the hydraulic system 10 for example a hydraulic system of a Reachstackers not shown here can, has a pump for the hydraulic oil 12. About this pump is the Hydraulic oil fed to a consumer 14 not shown here.
  • Throttle 18 a defined and constant hydraulic oil partial flow taken and a Filter 20 supplied.
  • the filter 20 is associated with a pressure transducer 22.
  • a check valve 24 is provided to the filter 20, a check valve 24 is provided. The over the very fine-pored Filter element 20 guided hydraulic oil flow is then returned to the hydraulic system supplied at a lower pressure level.
  • a throttle 18 a volume regulator, a flow divider or other means for taking a constant Partial flow can be used.
  • bypass filter system By means of the bypass filter system shown here can be prevented that a hydraulic component in case of damage to the entire hydraulic system contaminated with particles. Such contamination can, for example, in increased wear in a pump, which leads to abrasion of the pump material, be flushed into the overall system. Thus, consequential damage in otherwise properly functioning components are effectively prevented.
  • the presented in the figure system can be by using the as pollution indicator serving pressure transducer particularly preferred as an early warning system use.
  • the clogging gauge measures the dynamic pressure before that of the constant Hydraulic oil flow through filter 20. Through a suitable indicator This dynamic pressure is used as a measure of the contamination of the filter. With reaching a certain pressure value signals the need for the filter element exchange. For this purpose, a warning light not shown here be provided in the cab.
  • a pollution speed results.
  • a sudden increase in this rate of pollution indicates a damage in the hydraulic system.
  • Damage can be, for example, an increased dirt entry of acting outside through a broken seal.
  • the running set be damaged by a pump, thereby causing increased wear be.

Landscapes

  • 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)
  • Forklifts And Lifting Vehicles (AREA)
EP05008201A 2004-05-04 2005-04-14 Système hydraulique pour véhicules de manutention Not-in-force EP1593858B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202004007062U 2004-05-04
DE202004007062U DE202004007062U1 (de) 2004-05-04 2004-05-04 Hydrauliksystem für Flurförderfahrzeuge

Publications (3)

Publication Number Publication Date
EP1593858A2 true EP1593858A2 (fr) 2005-11-09
EP1593858A3 EP1593858A3 (fr) 2006-09-06
EP1593858B1 EP1593858B1 (fr) 2010-07-21

Family

ID=34935189

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05008201A Not-in-force EP1593858B1 (fr) 2004-05-04 2005-04-14 Système hydraulique pour véhicules de manutention

Country Status (5)

Country Link
US (1) US20050247641A1 (fr)
EP (1) EP1593858B1 (fr)
AT (1) ATE475018T1 (fr)
DE (2) DE202004007062U1 (fr)
ES (1) ES2348665T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007033293A1 (de) * 2007-07-17 2009-01-29 Technotrans Ag Filtration für Druckmaschinen
CN101403403B (zh) * 2007-09-28 2013-03-27 卡特彼勒公司 具有过滤器旁路的流体回路
SE535284C2 (sv) * 2010-01-25 2012-06-12 Bt Products Ab Metod för rengöring av hydraulvätska, datorprogramsprodukt, styrenhet samt industritruck

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027595A (en) 1975-11-10 1977-06-07 Abex Corporation Hydraulic apparatus
DE4011913A1 (de) 1990-04-12 1991-10-17 Beyer Rudi Dipl Ing Hydrauliksystem mit filter und filteranordnung
DE4203062C1 (en) 1992-02-04 1993-07-01 Hemscheidt Maschinentechnik Schwerin Gmbh & Co, O-2781 Schwerin, De Hydraulic installation with main and sec. flow circuit and sec. flow filtration - comprises liq. tank with partition for limited screening of liq.flow into and out of tank.
DE19515962A1 (de) 1995-03-29 1996-10-02 Argo Gmbh Fuer Fluidtechnik Hydraulische Schaltung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3543934A (en) * 1968-09-18 1970-12-01 Int Basic Economy Corp Hydraulic reservoir and filter apparatus
US4685066A (en) * 1984-12-18 1987-08-04 Caterpillar Inc. Contamination monitor and method
US5975257A (en) * 1996-09-04 1999-11-02 Komatsu Mining Systems Inc. Method and apparatus for separating steering oil and brake cooling oil within a hydraulic tank
US6063269A (en) * 1998-08-06 2000-05-16 Caterpillar Inc. Filtration apparatus for a hydraulic system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027595A (en) 1975-11-10 1977-06-07 Abex Corporation Hydraulic apparatus
DE4011913A1 (de) 1990-04-12 1991-10-17 Beyer Rudi Dipl Ing Hydrauliksystem mit filter und filteranordnung
DE4203062C1 (en) 1992-02-04 1993-07-01 Hemscheidt Maschinentechnik Schwerin Gmbh & Co, O-2781 Schwerin, De Hydraulic installation with main and sec. flow circuit and sec. flow filtration - comprises liq. tank with partition for limited screening of liq.flow into and out of tank.
DE19515962A1 (de) 1995-03-29 1996-10-02 Argo Gmbh Fuer Fluidtechnik Hydraulische Schaltung

Also Published As

Publication number Publication date
ATE475018T1 (de) 2010-08-15
DE502005009930D1 (de) 2010-09-02
ES2348665T3 (es) 2010-12-10
DE202004007062U1 (de) 2005-09-15
EP1593858B1 (fr) 2010-07-21
US20050247641A1 (en) 2005-11-10
EP1593858A3 (fr) 2006-09-06

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