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SE508992C2 - Device for damping oscillations in a hydraulic load crane - Google Patents

Device for damping oscillations in a hydraulic load crane

Info

Publication number
SE508992C2
SE508992C2 SE9101544A SE9101544A SE508992C2 SE 508992 C2 SE508992 C2 SE 508992C2 SE 9101544 A SE9101544 A SE 9101544A SE 9101544 A SE9101544 A SE 9101544A SE 508992 C2 SE508992 C2 SE 508992C2
Authority
SE
Sweden
Prior art keywords
hydraulic
crane
damping
series
load
Prior art date
Application number
SE9101544A
Other languages
Swedish (sv)
Other versions
SE9101544L (en
SE9101544D0 (en
Inventor
Einar Karlsson
Original Assignee
Einar Karlsson
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 Einar Karlsson filed Critical Einar Karlsson
Priority to SE9101544A priority Critical patent/SE508992C2/en
Publication of SE9101544D0 publication Critical patent/SE9101544D0/en
Priority to DE4216241A priority patent/DE4216241A1/en
Priority to AT0103992A priority patent/AT409370B/en
Priority to FI922329A priority patent/FI101786B1/en
Publication of SE9101544L publication Critical patent/SE9101544L/en
Publication of SE508992C2 publication Critical patent/SE508992C2/en

Links

Classifications

    • 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
    • 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
    • B66C13/066—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for minimising or preventing longitudinal or transverse swinging of loads for minimising vibration of a boom

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Jib Cranes (AREA)
  • Control And Safety Of Cranes (AREA)

Abstract

The damping system is for the swinging movement of a hydraulic crane with jib slewed on a vertical axis by a double-acting system in a hydraulic circuit (58,60). The damping unit (66) contains a throttle (64) in series with a hydraulic ram (68), whose piston (70) moves freely to and fro between two end positions. This is mounted in a bypass pipe (62) across the slewing mechanism (48). There can be a second damping system in the hydraulic derricking circuit, connected to the side subjected to the pressure from the load, and comprising a hyraulic accumulator connected in series with an adjustable throttle. USE/ADVANTAGE - Damping system for crane matches damping effect to magnitude of load and jib swinging movement.

Description

508 992 Dämparen för vertikala svängningar av last 10. och kranarm 6. består av en hydraulackumulator ll. som är kopplad till en ställ- bar strypning 12. och som via en hydraulledning 13. är kopplad till den hydraulledning 15. som trycksätts när hydraulcylinder 14. lyfter upp kranarmarna 6. 508 992 The damper for vertical oscillations of load 10. and crane arm 6. consists of a hydraulic accumulator ll. which is connected to an adjustable choke 12. and which via a hydraulic line 13. is connected to the hydraulic line 15. which is pressurized when the hydraulic cylinder 14. lifts up the crane arms 6.

När kranen svänger upp och ner varierar trycket i hydraulledning 13. varvid hydraulackumulatorn laddas upp respektive laddas ur via strypning 12. Strypningen 12. omvandwarsvängrörelsens energi till värme varvid svängrörelsen bromsas upp.When the crane swings up and down, the pressure in the hydraulic line 13 varies, whereby the hydraulic accumulator is charged and discharged via the throttle 12. The throttle 12. converts the energy of the reverse swing movement into heat, whereby the swinging movement is slowed down.

Stora svängrörelser ger stora tryckskillnader i hydraulledningarna 3. och stora tryckvarationer i ledning 13. och därvid stora oljeflöden genom strypningarna 12. och 4. Eftersom tryckfallet genom stryp- ningarna är större vid stora flöden än vid små ökar bromseffekten vid större svängningar i motsats till en friktionsbroms som har största bromseffekten vid stillastående.Large turning movements give large pressure differences in the hydraulic lines 3. and large pressure variations in line 13. and thereby large oil flows through the throttles 12. and 4. Since the pressure drop through the throttles is greater at large flows than at small ones, the braking effect increases at larger oscillations as opposed to a friction brake which has the greatest braking effect when stationary.

Med hjälp av utrustningen enligt uppfinningen kan en svängning i lasten 10. snabbt dämpas utan att någon anordning behöver app- liceras i lastens upphängningsanordning 8. utan placeras på valfri plats.With the aid of the equipment according to the invention, an oscillation in the load 10 can be damped quickly without any device having to be applied in the load suspension device 8 without being placed in any place.

Krandämparen har största bromsverkan vid stora svängningar och liten bromsverkan vid små svängningar, vilket gör att lasten 10. och upphängningasanordningarna 8. och 9. stannar lodrätt i mot- sats till om en friktionsbroms används som appliceras i lastens upphängningasanordning 8. och låser dessa i ett läge som avviker från lodlinjen.The crane damper has the greatest braking effect at large oscillations and small braking action at small oscillations, which means that the load 10. and the suspension devices 8. and 9. stop vertically as opposed to if a friction brake is used which is applied in the load suspension device 8. and locks them in a position deviating from the vertical.

Genom att dämpa både den horisontella och vertikala svängningen i kranen minskar risken för haverier genom att spänningstopparna blir lägre.By damping both the horizontal and vertical oscillation in the crane, the risk of accidents is reduced by lowering the voltage peaks.

Förarmiljön förbättras och snabbare kranrörelser blir möjliga.The driver environment is improved and faster crane movements become possible.

Claims (2)

10 15 3 sus 992 Patentkrav10 15 3 sus 992 Patentkrav 1. Anordning för att dämpa svängningar i en hydraulisk lastkran innefattande en omkring en huvudsakligen vertikal axel svängbar kranarm (6) och i en hydraulledning (5) inkopplade svängdylindrar (7) för kranarmen (6), k ä n n e t e c k n a d av att i en med hydraulledningen (5) förbunden förbiledning (3) till svängcylindrarna (7) är inkopplad en dämpningsanordning innefattande en strypning (4) i serie med en cylinder (1) innefattande en däri mellan två ändlägen fram och åter fritt rörlig kolv (2).Device for damping oscillations in a hydraulic load crane comprising a crane arm (6) pivotable about a substantially vertical axis and pivot cylinders (7) connected to a crane arm (6) connected in a hydraulic line (5), characterized in (5) connected bypass (3) to the swing cylinders (7) is connected to a damping device comprising a choke (4) in series with a cylinder (1) comprising a piston (2) freely movable therein between two end positions. 2. Anordning enligt krav 1 innefattande en lyftcylinder (14) för höjning och sänkning av kranarmen (6), k ä n n e - t e c k n a d att vid den sida av lyftcylindern (14) som trycksätts vid lastning, är inkopplad en andra dämpanordning innefattande en hydraulackumulator (11) i serie med en ställbar strypning (12). .HDevice according to claim 1, comprising a lifting cylinder (14) for raising and lowering the crane arm (6), characterized in that at the side of the lifting cylinder (14) which is pressurized during loading, a second damping device comprising a hydraulic accumulator ( 11) in series with an adjustable choke (12). .HRS
SE9101544A 1991-05-22 1991-05-22 Device for damping oscillations in a hydraulic load crane SE508992C2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SE9101544A SE508992C2 (en) 1991-05-22 1991-05-22 Device for damping oscillations in a hydraulic load crane
DE4216241A DE4216241A1 (en) 1991-05-22 1992-05-16 Hydraulic-crane damping system - has by=pass pipe across slewing mechanism containing throttle and RAM piston in series
AT0103992A AT409370B (en) 1991-05-22 1992-05-20 ARRANGEMENT FOR DAMPING VIBRATIONS IN A CRANE
FI922329A FI101786B1 (en) 1991-05-22 1992-05-21 Crane damping arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9101544A SE508992C2 (en) 1991-05-22 1991-05-22 Device for damping oscillations in a hydraulic load crane

Publications (3)

Publication Number Publication Date
SE9101544D0 SE9101544D0 (en) 1991-05-22
SE9101544L SE9101544L (en) 1992-11-23
SE508992C2 true SE508992C2 (en) 1998-11-23

Family

ID=20382803

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9101544A SE508992C2 (en) 1991-05-22 1991-05-22 Device for damping oscillations in a hydraulic load crane

Country Status (4)

Country Link
AT (1) AT409370B (en)
DE (1) DE4216241A1 (en)
FI (1) FI101786B1 (en)
SE (1) SE508992C2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE505698C2 (en) * 1994-04-22 1997-09-29 Hiab Ab Device for suppressing undesirable oscillation movements in a wreath
SE535364C2 (en) * 2010-11-19 2012-07-10 Cranab Ab Swing damping and load crane equipped with such
EP3309326A1 (en) * 2016-10-14 2018-04-18 Putzmeister Engineering GmbH Method and device for controlling the movement of a concrete distribution mast
EP4105161A1 (en) * 2021-06-14 2022-12-21 EPSILON Kran GmbH. Hydraulic system for a lifting device
CN115557390B (en) * 2022-09-15 2024-04-16 中联重科股份有限公司 Boom lifting control system, tower crane and hydraulic control loop of damping cylinder

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE416538B (en) * 1979-04-02 1981-01-19 Hiab Foco Ab DEVICE FOR HYDRAULIC CRANES
DE3126206A1 (en) * 1981-07-03 1983-01-20 Fried. Krupp Gmbh, 4300 Essen Device for damping crane load oscillations
DK151102C (en) * 1984-09-06 1988-03-21 Fridtjof Berg Kroell HYDRAULIC CROWD DRIVE
JPH0639317B2 (en) * 1989-09-09 1994-05-25 株式会社神戸製鋼所 Displacement suppression mechanism for mobile cranes

Also Published As

Publication number Publication date
FI101786B (en) 1998-08-31
SE9101544L (en) 1992-11-23
FI922329L (en) 1992-11-23
FI101786B1 (en) 1998-08-31
DE4216241A1 (en) 1992-11-26
FI922329A0 (en) 1992-05-21
AT409370B (en) 2002-07-25
ATA103992A (en) 2001-12-15
SE9101544D0 (en) 1991-05-22

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Legal Events

Date Code Title Description
NUG Patent has lapsed