EP0234451B1 - Grue - Google Patents

Grue Download PDF

Info

Publication number
EP0234451B1
EP0234451B1 EP87102071A EP87102071A EP0234451B1 EP 0234451 B1 EP0234451 B1 EP 0234451B1 EP 87102071 A EP87102071 A EP 87102071A EP 87102071 A EP87102071 A EP 87102071A EP 0234451 B1 EP0234451 B1 EP 0234451B1
Authority
EP
European Patent Office
Prior art keywords
winch
load
force
crane
cable
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.)
Expired - Lifetime
Application number
EP87102071A
Other languages
German (de)
English (en)
Other versions
EP0234451A3 (en
EP0234451A2 (fr
Inventor
Walter Dipl.-Ing Länge
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
Priority to AT87102071T priority Critical patent/ATE59367T1/de
Publication of EP0234451A2 publication Critical patent/EP0234451A2/fr
Publication of EP0234451A3 publication Critical patent/EP0234451A3/de
Application granted granted Critical
Publication of EP0234451B1 publication Critical patent/EP0234451B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • B66D1/48—Control devices automatic
    • B66D1/52—Control devices automatic for varying rope or cable tension, e.g. when recovering craft from water
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S254/00—Implements or apparatus for applying pushing or pulling force
    • Y10S254/90—Cable pulling drum having wave motion responsive actuator for operating drive or rotation retarding means

Definitions

  • the invention relates to a crane with a hoist having a hoist rope and a hoist winch with a slip clutch arranged between the hoist rope winch and the drive.
  • the payload coefficient which is dependent on the lifting speed, the rigidity of the crane and the vertical speed of the load to be lifted relative to the crane, takes into account the dynamic loads on the crane which are caused by the impact of the load moving relative to the crane. Depending on the significant wave height and the average period of the waves, this lifting load coefficient can be between 1.3 and about 4.5. Since a moving load-lifting crane has to be designed and designed taking into account the largest occurring lifting load factor, the crane construction is considerably more expensive.
  • a generic crane is already known from AT-B-310 994, in which the movement of the transport ship is transmitted to the load, the load being able to be moved relative to the ship by the load winch.
  • this known winch device additionally has a tension winch which is provided with a tension winch rope, which in turn is connected to the ship.
  • a hydraulic or pneumatically operated slip clutch is provided for driving the tensioning winch, so that the tensioning winch rope is given an essentially constant tension.
  • the load winch is connected to the tension winch.
  • the up and down movement of the ship causes the supply of a variable control signal in a control device for the hydraulic or pneumatic medium in order to vary the pressure of the actuating medium which is supplied to the coupling.
  • the object of the invention is therefore to further develop a crane of the type specified at the outset in such a way that, despite use, it is of simple construction in the case of considerable vertical relative movements between the latter and the load to be lifted.
  • this object is achieved in a generic crane by the features of the characterizing part of claim 1.
  • the crane according to the invention makes it possible to lift a load which is moved in the vertical direction relative to the crane essentially in the same way as a load which is in the position of rest relative to the crane. Because when the initially slack rope is attached to the load via the crane hook or the like, the rope is initially tightened, which then increases in tractive force and thereby increasingly carries a greater part of the weight of the load. However, the load carries out its relative movements in relation to the crane, but the lifting force transferred from the hoisting rope to the load is constantly increasing. The hoist rope attached to the load is thus in a relative rest position to the load, because the relative movements of the load relative to the crane are compensated for by turning the cable drum driven with a certain torque back and forth. With the crane according to the invention, a moving load is thus basically lifted in the same way as an unmoving load.
  • the load moved in the vertical direction has negative and positive accelerations which alternate with one another depending on the direction of movement of the load. If the cable pulling force is increased in a predetermined time in the crane according to the invention, this reaches a value which corresponds to the weight of the load to be lifted. Of course, the force required to lift the load can increase briefly if the load is subjected to negative acceleration.
  • the load is lifted bumplessly at a point in time when the cable pulling force has reached the weight of the load plus any acceleration force that is currently acting.
  • a lifting load factor need not be taken into account in the crane according to the invention, because there is no slack rope during lifting that the moving load could impact.
  • the slipping clutch or the drive limit the highest rope force to a force which is above the nominal load by a certain safety factor, preferably a safety factor in the range of 1.5.
  • a certain safety factor preferably a safety factor in the range of 1.5.
  • the control initially pretensions the hoisting rope via the drive of the winch or the slip clutch to a predetermined fraction, preferably in the range of 5%, of the nominal load and then continuously pulls the tractive force to that corresponding to the nominal load or to Lifting the load increases the required value.
  • the hoist rope is initially relatively little pretensioned until all loose rope is reeled up and thereby slack rope is avoided before a switching impulse is triggered by a forced switching, that is to say automatically, which increases the rope force continuously until the load is lifted.
  • the circuit can be carried out in such a way that the time of the switching pulse for increasing the tractive force is selected by the crane operator, but in any case the cable is preloaded beforehand.
  • the lifting winch the drive of which is provided with an arm which forms a torque support and which, when a predetermined rope force below the nominal load is reached, actuates a switch or a valve which inevitably increases the drive torque of the winch up to the highest rope force such a torque support provides additional security that the Cable pull does not drop once the lifting process has been initiated.
  • the switch or the valve of the torque support are expediently actuated when the pretensioning force of the lifting cable is reached.
  • a hydraulic motor is expediently provided, the drive torque of which can be controlled by the pressure medium pressure.
  • the slip clutch expediently consists of a multi-plate clutch.
  • the multi-plate clutch can be loaded by pistons preloaded by springs, which can be acted upon by a hydraulic fluid to reduce the slip torque.
  • the crane according to the invention can preferably be a crane with a luffing jib mounted on the platform of an oil rig.
  • the invention can also be implemented in cranes with a rigid boom or without a boom.
  • Fig. 1 is a schematic representation of the hoist with winch and the associated drive and control devices
  • Fig. 2 is a representation corresponding to Fig. 1 with an additional incremental encoder that interrupts the power supply to the solenoid valve S1 as soon as the clutch grinds
  • Fig. 1 is a schematic representation of the hoist with winch and the associated drive and control devices
  • Fig. 2 is a representation corresponding to Fig. 1 with an additional incremental encoder that interrupts the power supply to the solenoid valve S1 as soon as the clutch grinds
  • FIG. 3 shows a representation corresponding to FIGS. 1 and 2, but with a hydraulic cylinder acting on the clutch in a different embodiment.
  • the control lever shown is operated to lift.
  • the switches M1 and M2 are switched.
  • the proportional valve S5 is energized via the power stage and the hoist pump P1 is pivoted out, thereby driving the hydraulic motor MA.
  • the solenoid valve S1 is switched via the then closed switch M3.
  • a pressure can now build up in line 4 which corresponds to the pressure set at the pressure relief valve V5.
  • a multi-plate clutch 1 is installed between the transmission and the shaft of the winch.
  • the slip torque of the slip clutch 1 is set by the piston rod of the cylinder Z1, a compression spring acting on the piston.
  • the hydraulic fluid from line 4 acts on the piston ring, so that the spring is compressed and the multi-plate clutch is relieved (opened) by the pressure in hydraulic line 4.
  • the pressure relief valve V5 is set so that a slipping torque is set on the multi-plate clutch 1, which corresponds to approximately 5% of the nominal cable pull.
  • the gear is rotatably supported on the shaft and is supported on the spring 3.
  • the spring 3 is selected so that when approximately 5% of the nominal cable is reached, the valve V6 is switched and at the same time the switch M3 drops out. As a result, the solenoid valve S1 falls off and the pressure line 4 is relieved via the valve V6.
  • the hydraulic pressure in the cylinder Z1 slowly decreases via the nozzle D1.
  • the time until the pressure drops completely is regulated via the nozzle D1 and is approx. 1 sec. and be longer. Due to the slow pressure drop, the slip torque in the clutch increases continuously until the maximum torque set via the spring in cylinder Z1 is reached.
  • This switching method ensures on the one hand that the multi-plate clutch is opened with each stroke and then slowly closed again. On the other hand, about redundant circuit ensures that the clutch is not opened when the load is suspended.
  • a refinement of the control can be achieved in that, as shown in FIG. 2, an incremental encoder X1 is additionally installed, which interrupts the current supply to the solenoid valve S1 as soon as the clutch grinds. This in turn has the result that the clutch closing process described above is initiated. This means that if any slack rope is reeled, the clutch slips and then the tractive force is continuously increased.
  • Electrical monitoring logic can be installed as additional equipment, which monitors all systems once and at the same time indicates where the fault is in the event of a failure.
  • destiebs can be used instead of the winch drive shown in the example.
  • the maximum torque to be transmitted and thus the tensile force is set via the spring in cylinder Z1 so that the maximum tensile force e.g. does not exceed 1.5 times the nominal load. This effectively protects the crane from overload. If a crane now has a permissible lifting load that varies with the radius, the slip torque, and thus the maximum tractive force, can be changed in that the chamber 1 of the cylinder Z2 is acted on by hydraulic pressure, as shown in FIG. 3. This cylinder is installed in place of ZI in Figs. 1 and 2.
  • the resulting pressure in the pressure line 5 is adjusted via the solenoid valve V3 or through a mechanically adjustable pressure relief valve V4 or both.
  • the mechanical adjustment of the valve V4 can take place via the lever 6, which is driven directly by the boom, for example in the case of luffing cranes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Control And Safety Of Cranes (AREA)
  • Luminescent Compositions (AREA)

Claims (7)

1. Grue avec un dispositif de levage présentant un câble de relevage et un treuil du câble de relevage, avec un accouplement à friction entre le treuil du câble de relevage et un entraînement, caractérisée en ce que ceux-ci sont commandés de manière que la force de traction du câble de relevage, sur un intervalle de temps qui, avantageusement, est plus grand qu'une seconde, est augmentée par étapes ou continuellement jusqu'à la force correspondant au poids de la charge ou, respectivement, nécessaire pour la levée et en ce que le treuil peut être mis en rotation inverse par des forces contraires dépassant la force du câble avec retrait du câble de relevage.
2. Grue selon la revendication 1, caractérisée en ce que l'accouplement à friction ou bien l'entraînement limite la plus haute force du câble à une force qui est au-delà de la charge nominale d'un facteur déterminé de sécurité; avantageusement, un facteur de sécurité de l'ordre de 1,5.
3. Grue selon la revendication 1 ou 2, caractérisée en ce que la commande du câble de relevage tend, au préalable, l'entraînement du treuil ou bien l'accouplement à friction sur une fraction prédéterminée, avantageusement de l'ordre de 5%, de la charge nominale et ensuite la force de traction augmente continuellement à la valeur correspondant à la charge nominale ou, respectivement, nécessaire à celle pour soulever la charge.
4. Grue selon l'une quelconque des revendications 1 à 3, caractérisée en ce que le treuil de levage ou, respectivement, son entraînement est pourvu d'un bras formant un support du couple de rotation qui actionne, lorsqu'est atteinte une force du câble déterminée et se trouvant en dessous de la charge nominale, un commutateur ou une soupape qui augmente de force le couple de rotation d'entraînement du treuil jusqu'à la plus haute force du câble.
5. Grue selon la revendication 4, caractérisée en ce que le commutateur ou la soupape sont actionnés par le bras lorsqu'est atteinte la force de tension préalable du câble de relevage.
6. Grue selon l'une quelconque des revendications 1 à 5, caractérisée en ce que l'accouplement à friction se compose d'un accouplement à lamelles.
7. Grue selon la revendication 6, caractérisée en ce l'accouplement à lamelles est chargé par des pistons mis sous tension préalable par des ressorts, lesquels peuvent être sollicités pour la diminution du moment de glissement au moyen d'un fluide hydraulique.
EP87102071A 1986-02-19 1987-02-13 Grue Expired - Lifetime EP0234451B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87102071T ATE59367T1 (de) 1986-02-19 1987-02-13 Kran.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3605324 1986-02-19
DE3605324 1986-02-19

Publications (3)

Publication Number Publication Date
EP0234451A2 EP0234451A2 (fr) 1987-09-02
EP0234451A3 EP0234451A3 (en) 1988-06-01
EP0234451B1 true EP0234451B1 (fr) 1990-12-27

Family

ID=6294477

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87102071A Expired - Lifetime EP0234451B1 (fr) 1986-02-19 1987-02-13 Grue

Country Status (8)

Country Link
US (1) US4782961A (fr)
EP (1) EP0234451B1 (fr)
AT (1) ATE59367T1 (fr)
CA (1) CA1309384C (fr)
DE (1) DE3766976D1 (fr)
DK (1) DK164032C (fr)
FI (1) FI870699A (fr)
NO (1) NO171718C (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5716166A (en) * 1995-07-20 1998-02-10 Continental Emsco Co. Offshore retrofit of barge bumper systems
DE102005034677A1 (de) * 2005-07-25 2007-02-01 Liebherr-Werk Nenzing Gmbh, Nenzing Kran
US8608004B2 (en) * 2006-04-26 2013-12-17 Chapin Manufacturing, Inc. Sprayer tank cap with incorporated pressure relief valve

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128861A (en) * 1964-04-14 trondsen
DE1556786B2 (de) * 1968-03-05 1972-05-10 Peterson, Earl August, Long Beach, Calif. (V.StA.) Winde mit auf einer welle drehfest angeordneter kabeltrommel und reibungskupplung
US3648858A (en) * 1970-05-07 1972-03-14 Byron Jackson Inc Stabilized load hoist apparatus
US3799505A (en) * 1971-11-23 1974-03-26 Rucker Co Crane aiding mechanism
DE2340428A1 (de) * 1973-08-09 1975-02-20 Hans Tax Schwenkantrieb fuer einen drehkran
GB1397880A (en) * 1973-10-09 1975-06-18 Brown Brothers & Co Ltd Heave compensating device for marine
GB1505645A (en) * 1974-07-30 1978-03-30 Stothert & Pitt Ltd Apparatus for use in raising or lowering a load in a condition of relative motion
GB1569595A (en) * 1976-09-01 1980-06-18 Secretary Industry Brit Cranes
US4304337A (en) * 1980-05-29 1981-12-08 Bucyrus-Erie Company Marine crane lifting control
DE3418026C2 (de) * 1984-05-15 1987-04-02 Mannesmann Rexroth GmbH, 8770 Lohr Winde zum Aufnehmen von schwimmenden Lasten bei Seegang
NL8403587A (nl) * 1984-11-26 1986-06-16 Rietschoten & Houwens Tech Han Inrichting voor het halen en vieren van een last vanaf, respectievelijk op een in vertikale zin bewegend oppervlak.

Also Published As

Publication number Publication date
ATE59367T1 (de) 1991-01-15
CA1309384C (fr) 1992-10-27
FI870699A (fi) 1987-08-20
DE3766976D1 (de) 1991-02-07
NO870645L (no) 1987-08-20
DK164032B (da) 1992-05-04
DK164032C (da) 1992-09-21
FI870699A0 (fi) 1987-02-19
US4782961A (en) 1988-11-08
DK83087A (da) 1987-08-20
NO870645D0 (no) 1987-02-18
EP0234451A3 (en) 1988-06-01
NO171718C (no) 1993-04-28
DK83087D0 (da) 1987-02-18
EP0234451A2 (fr) 1987-09-02
NO171718B (no) 1993-01-18

Similar Documents

Publication Publication Date Title
DE2709089C2 (de) Winde für Kran, insbesondere Schiffskran
DE2240940C3 (de) Hydrostatisches Getriebe, insbesondere für Winden, Hubwinden, Wippwerkswinden o.dgl
DE3139528A1 (de) Seilwinde
EP3045416A1 (fr) Dispositif de levage, d'abaissement ou de retenue d'une charge et procede de commande d'un tel dispositif
DE2744098C2 (de) Derrick-Kran
DE2913569A1 (de) Windevorrichtung
DE3418026C2 (de) Winde zum Aufnehmen von schwimmenden Lasten bei Seegang
DE3003257A1 (de) Einrichtung zur kompensation von lageaenderungen o.dgl.
EP0234451B1 (fr) Grue
DE102020113081A1 (de) Greifvorrichtung mit Schließantrieb durch übersetzte Kraftvervielfältigung
DE2839723C2 (de) Lastdrehvorrichtung
DE2647536A1 (de) Lastabsenkvorrichtung fuer ein hebegeraet
DE20219282U1 (de) Überlastsicherung für einen Kran
DE2507029C3 (de) Hydraulische Anordnung zur Betätigung einer Winde
DE602004005458T2 (de) Hebemechanismus
DE2212179C2 (de) Hydraulisches System, vorzugsweise zum Antrieb von Winden
DE202019101625U1 (de) Anschlagmittel zum Aufhängen von Lasten an ein Tragmittel
DE2458393C3 (de) Steuer- und Sicherheitseinrichtung für Doppelportalkrane
DE20319073U1 (de) Kran, insbesondere Mobilkran
DE324031C (de) Treib- und Bremseinrichtung bei Windwerken fuer Zweiseilgreifer
DE19713592A1 (de) Hydraulische Winde
EP0316757B1 (fr) Installation de commande pour treuils à câble et/ou mécanismes rotatifs dans les appareils de levage
DE4422927A1 (de) Hubvorrichtung für Container
AT60666B (de) Elektrisch betriebene und gesteuerte Greiferhubwinde.
DE405003C (de) Mechanische Fernsteuerung fuer Winden mit Hilfe eines einzigen Zugorgans

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE ES GB IT LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE ES GB IT LI NL SE

17P Request for examination filed

Effective date: 19881201

17Q First examination report despatched

Effective date: 19890906

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES GB IT LI NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19901227

Ref country code: SE

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19901227

REF Corresponds to:

Ref document number: 59367

Country of ref document: AT

Date of ref document: 19910115

Kind code of ref document: T

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3766976

Country of ref document: DE

Date of ref document: 19910207

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19910213

ITTA It: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Effective date: 19910228

Ref country code: LI

Effective date: 19910228

ITF It: translation for a ep patent filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19910407

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050213

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20060221

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20060223

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20060306

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20070212

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20070213

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

NLV7 Nl: ceased due to reaching the maximum lifetime of a patent

Effective date: 20070213