EP2123593A1 - Compensation de fuite électro-hydraulique - Google Patents

Compensation de fuite électro-hydraulique Download PDF

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Publication number
EP2123593A1
EP2123593A1 EP20090158346 EP09158346A EP2123593A1 EP 2123593 A1 EP2123593 A1 EP 2123593A1 EP 20090158346 EP20090158346 EP 20090158346 EP 09158346 A EP09158346 A EP 09158346A EP 2123593 A1 EP2123593 A1 EP 2123593A1
Authority
EP
European Patent Office
Prior art keywords
pressure
lowering
load
brake
hydraulic
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
EP20090158346
Other languages
German (de)
English (en)
Other versions
EP2123593B1 (fr
Inventor
Thomas Heidrich
Johannes Schürmann
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.)
Manitowoc Crane Group France SAS
Original Assignee
Manitowoc Crane Group France SAS
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 Manitowoc Crane Group France SAS filed Critical Manitowoc Crane Group France SAS
Publication of EP2123593A1 publication Critical patent/EP2123593A1/fr
Application granted granted Critical
Publication of EP2123593B1 publication Critical patent/EP2123593B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/24—Operating devices
    • B66D5/26—Operating devices pneumatic or hydraulic
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B66C13/22—Control systems or devices for electric drives
    • B66C13/23—Circuits for controlling the lowering of the load
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28—Other constructional details
    • B66D1/40—Control devices
    • B66D1/42—Control devices non-automatic
    • B66D1/44—Control devices non-automatic pneumatic of hydraulic
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/003—Systems with load-holding 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50545—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using braking valves to maintain a back pressure
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • Y10T137/0324—With control of flow by a condition or characteristic of a fluid
    • Y10T137/0379—By fluid pressure

Definitions

  • the invention relates to an electro-hydraulic leak compensation device for a mobile crane lowering brake system in an open hydraulic circuit and also to a method for electro-hydraulic leak compensation in a mobile crane lowering brake system in an open hydraulic circuit.
  • Both the method and the apparatus can be used in a mobile crane with one or more winches in the open hydraulic circuit, in which the attached load is secured via a lowering brake valve and a mechanical brake against load crash.
  • a control device for a hoist of a crane which allows a jerk-free holding, lifting or lowering a load by comparing the oil pressure in the hydraulic circuit with the moment of the hoist drum.
  • a pressure sensor between a hydraulic pump and a hydraulic motor in a closed hydraulic circuit, a pressure sensor, and a torque sensor arranged on the hoist drum.
  • the parking brake is released only after the pressure sensor measures a pressure which corresponds to the holding torque of the hoist drum according to the current load condition.
  • the electro-hydraulic leak compensation device comprises a pressure sensor which measures the hydraulic pressure on the load side of the hydraulic motor before closing the mechanical brake.
  • the hydraulic pressure or the load pressure known immediately before the closing of the mechanical brake and it can therefore be rebuilt before opening the mechanical brake this measured pressure value to allow a smooth start-up of the hoist winch.
  • the load side of the hydraulic motor is the side in the hydraulic circuit at which the lifting line for the hydraulic motor is located.
  • a control unit stores the measured pressure as the actual pressure.
  • This measured actual pressure which corresponds to the load case, then serves as a reference for the pressure which has to be built up shortly before the mechanical brake is opened, in order to enable jerk-free starting of the lifting mechanism.
  • hydraulic fluid is introduced into a volume between the hydraulic motor and the lowering brake valve in order to compensate for the volume of fluid escaped by leakage during the closing time of the mechanical brake.
  • a pump of the mobile crane takes before the opening of the mechanical brake fluid from the lifting line and spends it in the volume between the hydraulic motor and Senkbremsventil until the desired amount of fluid spent, or the desired pressure level was reached in volume.
  • the pressure built up can have the same value as the prevailing pressure before closing the mechanical brake, but it can also be different, ie higher or lower than the measured pressure before closing the mechanical brake.
  • the hoist may comprise a gear, so that the hydraulic motor is finally coupled via the gear and the mechanical brake to the hoist drum.
  • the lowering brake valve is located in the hydraulic circuit on the load side of the hydraulic motor, ie on the side at which the Lever line leads to the hydraulic motor, which is driven by the pressure therein.
  • the pressure sensor in the hydraulic circuit on the load side of the lowering brake valve that is arranged on the side of the leading to the lowering brake valve lever line.
  • the lowering brake valve is arranged in this embodiment between the pressure sensor and the hydraulic motor in the hydraulic circuit, but it is also conceivable that the pressure sensor is located between the lowering brake valve and the hydraulic motor.
  • the invention further relates to a method for electrohydraulic leak compensation in a mobile crane lowering brake system in an open hydraulic circuit.
  • the pressure in the lifting line that is, on the load side of the hydraulic motor is measured by the pressure sensor preferably before closing the mechanical brake before closing the mechanical brake.
  • This measured pressure can also be referred to as actual pressure, as it reflects the current load condition on the crane's hoist.
  • a target pressure is preferably determined by a control unit, which is calculated by offsetting the measured actual pressure with a predetermined value as a function of the load condition.
  • This calculated target pressure is then built up immediately before the opening of the mechanical brake in the volume between the lowering brake valve and the hydraulic motor to allow a smooth start of the hoist.
  • the load pressure of the winch is detected with the aid of a pressure sensor and, if necessary, occupied by the controller with a factor so that this is restored before the mechanical brake is opened by adding hydraulic oil into the space between the lowering brake valve and the hydraulic motor.
  • This is done by controlling the winch in lifting direction with closed mechanical brake.
  • all process steps of the method according to the invention run fully automatically before each lowering and lifting of a load, ie without an operator having to intervene during the procedure.
  • the prevailing operating state is detected before the closing, in particular immediately before the closing of the mechanical brake, ie, a distinction is also made between the lifting and lowering of a load.
  • This distinction ultimately allows the controller to charge a value determined in dependence on the load condition with the measured actual pressure. It is easy to imagine that shortly after lifting a load in front of the hydraulic motor, a higher pressure prevails than when holding the same load, since additional pressure has to be built up to accelerate the load. The same applies of course when lowering the load. By detecting these load conditions, it is possible in the present invention to respond to this during pressure build-up shortly before the release of the mechanical brake, so that even in such situations, a smooth start-up of the hoist is possible.
  • the load pressure can always be used immediately before closing the mechanical brake. In this case, it can be distinguished from the controller whether a load was last lifted or lowered.
  • the method according to the invention invariably applies both during lifting and when lowering or before lifting and before lowering a load, however, the method according to the invention can also be suspended in certain situations, in particular when the load pressure or the measured actual pressure falls below a predetermined value.
  • both the mechanical brake and the lowering brake valve can be opened to provide additional securing of the load.
  • FIG. 1 a diagram of an electro-hydraulic leakage compensation device according to the invention for a mobile crane lowering brake system with an open hydraulic circuit.
  • the pilot valves for lifting 1 and lowering 10 actuate the spool 2 and direct the hydraulic oil in the lifting or lowering line 3 and 11.
  • the brake release valve 8 opens when lifting the mechanical brake 9.
  • the hoist winch is coupled via the gear 6 and the mechanical brake to the hydraulic motor 5, on the load side 12, the lowering brake valve 4 is located.
  • the load pressure is determined by means of the pressure sensor 13, which is located on the load side of the lowering brake valve 4, where a bore provided with a pipe rupture protection 14, serves as a connection.
  • the pilot valve for lifting 1 opens the spool 2 in the lifting direction.
  • the hydraulic oil passes via the lifting line 3 and the lowering brake valve 4 to the hydraulic motor 5.
  • the leakage of the hydraulic motor 5 is compensated in space 12 until the load pressure of the previous lifting or lowering operation is established.
  • the mechanical brake 9 is opened, between the hydraulic motor and mechanical Gear is arranged.
  • the hydraulic motor drives the hoist winch 7 via the mechanical transmission 6.
  • the sinking process is carried out automatically in the following order:
  • the pilot valve for lifting 1 opens the spool 2 in the lifting direction.
  • the hydraulic oil passes through the lifting line 3 and the lowering brake valve 4 to the hydraulic motor 5.
  • the pilot valve for lowering 10 opens the spool 2 in the lowering direction.
  • the hydraulic oil passes via the drain line 11 to the hydraulic motor 5.
  • the mechanical brake 9 is opened, which is arranged between the hydraulic motor 5 and the mechanical transmission 6.
  • the lowering brake valve 4 is opened according to the desired lowering speed.
  • the hydraulic motor 5 drives the hoist winch 7 via the mechanical transmission 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control And Safety Of Cranes (AREA)
EP20090158346 2008-05-21 2009-04-21 Compensation de fuite électro-hydraulique Active EP2123593B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810024512 DE102008024512B4 (de) 2008-05-21 2008-05-21 Elektrohydraulische Leck-Kompensation

Publications (2)

Publication Number Publication Date
EP2123593A1 true EP2123593A1 (fr) 2009-11-25
EP2123593B1 EP2123593B1 (fr) 2012-05-23

Family

ID=40947353

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20090158346 Active EP2123593B1 (fr) 2008-05-21 2009-04-21 Compensation de fuite électro-hydraulique

Country Status (8)

Country Link
US (1) US8167154B2 (fr)
EP (1) EP2123593B1 (fr)
JP (1) JP2009280402A (fr)
KR (1) KR101184151B1 (fr)
CN (1) CN101585498B (fr)
CA (1) CA2666297C (fr)
DE (1) DE102008024512B4 (fr)
ES (1) ES2388367T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105939957A (zh) * 2014-01-30 2016-09-14 玫海伟尔特股份有限公司 能流体地操作的故障安全型盘式制动系统以及具有这个系统的提升装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5072926B2 (ja) * 2009-09-03 2012-11-14 株式会社小松製作所 作業車両
DK177006B1 (en) * 2010-01-19 2010-11-22 Ah Ind Projects Aps Method for controlling orientation of a load suspended in a carrier wire around the wire as well as a player arrangement
DE202010011345U1 (de) * 2010-08-11 2010-10-21 Terex Demag Gmbh Überwachungs- und Warneinrichtung an Baumaschinen
CN102893038B (zh) * 2010-12-21 2015-02-11 株式会社小松制作所 铺管机及铺管机的预热方法
CN102140807B (zh) * 2011-01-11 2012-05-23 徐州徐工挖掘机械有限公司 一种提高挖掘机挖掘操纵特性和平整作业特性的方法
DE102012006551B4 (de) 2012-04-02 2022-10-20 Wessel-Hydraulik Gmbh Hydraulische Schaltungsanordnung
DE102012010266B4 (de) * 2012-05-25 2015-02-12 Wessel-Hydraulik Gmbh Hydraulische Schaltungsanordnung
US9950910B2 (en) 2012-09-11 2018-04-24 Eltronic A/S Method for controlling the orientation of a load suspended from a bearing wire about said bearing wire and a winch arrangement
CN103072896B (zh) * 2013-01-28 2015-04-22 徐州重型机械有限公司 分体式电比例先导控制阀及流动式起重机
CN103287999B (zh) * 2013-06-18 2015-08-05 中联重科股份有限公司 工程机械及其卷扬变幅液压系统、作业方法
JP6325801B2 (ja) * 2013-11-20 2018-05-16 株式会社神戸製鋼所 電動ウインチ装置
CN105927602B (zh) * 2016-07-08 2017-12-08 四川宏华石油设备有限公司 一种绞车控制装置
CN108516467B (zh) * 2018-06-20 2019-10-25 徐州重型机械有限公司 起重机械的液压控制系统和起重机械
EP3653562A1 (fr) * 2018-11-19 2020-05-20 B&R Industrial Automation GmbH Procédé et régulateur d'oscillation permettant de réguler les oscillations d'un système technique oscillant
CN114014191B (zh) * 2021-12-03 2023-08-18 中船华南船舶机械有限公司 一种双保险绞车的液压系统

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US4549640A (en) * 1982-01-28 1985-10-29 Hitachi Construction Machinery Co., Ltd. Operation system for hoisting device
JPH08217389A (ja) 1995-02-15 1996-08-27 Sumitomo Constr Mach Co Ltd 油圧式ウインチ装置
DE19604428C2 (de) 1995-12-13 1998-06-18 Liebherr Werk Ehingen Steuervorrichtung für ein Hubwerk eines Krans
JPH115693A (ja) * 1997-06-16 1999-01-12 Kobe Steel Ltd 油圧ウィンチ装置
CN1413900A (zh) * 2001-10-25 2003-04-30 上海三菱电梯有限公司 用蓄能器改善运行性能的液压电梯系统
JP2003322103A (ja) * 2002-05-09 2003-11-14 Sumitomo Heavy Industries Construction Crane Co Ltd 昇降制御装置

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Publication number Priority date Publication date Assignee Title
US4549640A (en) * 1982-01-28 1985-10-29 Hitachi Construction Machinery Co., Ltd. Operation system for hoisting device
JPH08217389A (ja) 1995-02-15 1996-08-27 Sumitomo Constr Mach Co Ltd 油圧式ウインチ装置
DE19604428C2 (de) 1995-12-13 1998-06-18 Liebherr Werk Ehingen Steuervorrichtung für ein Hubwerk eines Krans
JPH115693A (ja) * 1997-06-16 1999-01-12 Kobe Steel Ltd 油圧ウィンチ装置
CN1413900A (zh) * 2001-10-25 2003-04-30 上海三菱电梯有限公司 用蓄能器改善运行性能的液压电梯系统
JP2003322103A (ja) * 2002-05-09 2003-11-14 Sumitomo Heavy Industries Construction Crane Co Ltd 昇降制御装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105939957A (zh) * 2014-01-30 2016-09-14 玫海伟尔特股份有限公司 能流体地操作的故障安全型盘式制动系统以及具有这个系统的提升装置

Also Published As

Publication number Publication date
KR20090121233A (ko) 2009-11-25
ES2388367T3 (es) 2012-10-11
KR101184151B1 (ko) 2012-09-18
CN101585498A (zh) 2009-11-25
CA2666297A1 (fr) 2009-11-21
EP2123593B1 (fr) 2012-05-23
DE102008024512B4 (de) 2010-08-12
JP2009280402A (ja) 2009-12-03
CN101585498B (zh) 2013-07-03
CA2666297C (fr) 2012-02-21
US8167154B2 (en) 2012-05-01
US20090294746A1 (en) 2009-12-03
DE102008024512A1 (de) 2010-01-28

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