AU2354395A - A device for damping undesirable oscillations in a crane member - Google Patents

A device for damping undesirable oscillations in a crane member

Info

Publication number
AU2354395A
AU2354395A AU23543/95A AU2354395A AU2354395A AU 2354395 A AU2354395 A AU 2354395A AU 23543/95 A AU23543/95 A AU 23543/95A AU 2354395 A AU2354395 A AU 2354395A AU 2354395 A AU2354395 A AU 2354395A
Authority
AU
Australia
Prior art keywords
restriction
energy
hydraulic
crane member
undesirable oscillations
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.)
Abandoned
Application number
AU23543/95A
Inventor
Peter Astrom
Gosta Svensson
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.)
Hiab AB
Original Assignee
Hiab AB
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 Hiab AB filed Critical Hiab AB
Publication of AU2354395A publication Critical patent/AU2354395A/en
Abandoned legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/84—Slewing gear
    • B66C23/86—Slewing gear hydraulically actuated
    • 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
    • B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
    • B66C13/06—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for minimising or preventing longitudinal or transverse swinging of loads
    • 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
    • B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
    • B66C13/06—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for minimising or preventing longitudinal or transverse swinging of loads
    • B66C13/063—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for minimising or preventing longitudinal or transverse swinging of loads electrical
    • 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
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • F15B2211/6313—Electronic controllers using input signals representing a pressure the pressure being a load pressure
    • 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
    • F15B2211/86—Control during or prevention of abnormal conditions
    • F15B2211/8616—Control during or prevention of abnormal conditions the abnormal condition being noise or vibration

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control And Safety Of Cranes (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

The present invention relates to a device for damping undesirable oscillations of a crane member (1) which is pivotally movable by means of at least one hydraulic motor (5, 5'). The hydraulic circuit (8) has a restriction (13) co-operating with a circuit-closing device (14; 18) the purpose of the restriction being to convert energy inherent in the system to heat in the hydraulic oil. The device includes means (14, 15, 16, 16') for controlling the closing device (14; 18) according to instantaneous conditions and/or changes or conditions, such as pressure and/or flow, in the hydraulic circuit (8). The energy-converting action of the restriction (13) is instantaneously activated as soon as a certain condition and/or a certain change of condition occurs. The conduit (12) in which the restriction (13) lies is completely shut off, rendering flow of oil through the restriction impossible, as long as the energy-converting action of the restriction is not called for.
AU23543/95A 1994-04-22 1995-04-07 A device for damping undesirable oscillations in a crane member Abandoned AU2354395A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9401369 1994-04-22
SE9401369A SE505698C2 (en) 1994-04-22 1994-04-22 Device for suppressing undesirable oscillation movements in a wreath
PCT/SE1995/000375 WO1995029118A1 (en) 1994-04-22 1995-04-07 A device for damping undesirable oscillations in a crane member

Publications (1)

Publication Number Publication Date
AU2354395A true AU2354395A (en) 1995-11-16

Family

ID=20393744

Family Applications (1)

Application Number Title Priority Date Filing Date
AU23543/95A Abandoned AU2354395A (en) 1994-04-22 1995-04-07 A device for damping undesirable oscillations in a crane member

Country Status (6)

Country Link
EP (1) EP0756574B1 (en)
AT (1) ATE202324T1 (en)
AU (1) AU2354395A (en)
DE (1) DE69521423T2 (en)
SE (1) SE505698C2 (en)
WO (1) WO1995029118A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2158637T3 (en) 1998-09-08 2001-09-01 Palfinger Ag CRANE.
DK179730B1 (en) * 2017-10-06 2019-04-26 Hmf Group A/S Damping System, Damping Method and Crane Comprising It

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1284071B (en) * 1966-06-30 1968-11-28 Maschf Augsburg Nuernberg Ag Trolley with lifting guide of the load handling device by means of a link mechanism, a forced running device and a compensating device that cancels the forced running to a limited extent
US4531647A (en) * 1976-01-14 1985-07-30 Hitachi, Ltd. Device for stopping the swinging movement of a load hung by a crane
JPH0815998B2 (en) * 1989-10-14 1996-02-21 株式会社神戸製鋼所 Vibration suppressor for wheeled crane
SE508992C2 (en) * 1991-05-22 1998-11-23 Einar Karlsson Device for damping oscillations in a hydraulic load crane

Also Published As

Publication number Publication date
ATE202324T1 (en) 2001-07-15
EP0756574A1 (en) 1997-02-05
WO1995029118A1 (en) 1995-11-02
DE69521423T2 (en) 2002-05-02
SE9401369L (en) 1995-10-23
DE69521423D1 (en) 2001-07-26
SE505698C2 (en) 1997-09-29
SE9401369D0 (en) 1994-04-22
EP0756574B1 (en) 2001-06-20

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