EP0150187B1 - Improvements in or relating to winches - Google Patents

Improvements in or relating to winches Download PDF

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Publication number
EP0150187B1
EP0150187B1 EP84901789A EP84901789A EP0150187B1 EP 0150187 B1 EP0150187 B1 EP 0150187B1 EP 84901789 A EP84901789 A EP 84901789A EP 84901789 A EP84901789 A EP 84901789A EP 0150187 B1 EP0150187 B1 EP 0150187B1
Authority
EP
European Patent Office
Prior art keywords
capstan
cable
winch
friction
winch according
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
Application number
EP84901789A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0150187A1 (en
Inventor
John Thomas Hird Webb
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0150187A1 publication Critical patent/EP0150187A1/en
Application granted granted Critical
Publication of EP0150187B1 publication Critical patent/EP0150187B1/en
Expired legal-status Critical Current

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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
    • B66D1/60—Rope, cable, or chain winding mechanisms; Capstans adapted for special purposes
    • B66D1/74—Capstans
    • B66D1/7405—Capstans having two or more drums providing tractive force

Definitions

  • This invention relates to improvements in or relating to winches.
  • Winches have been proposed, and are described and are illustrated in U.S. Patent Specification Nos. 4,274,606 and 4,230,306, in which a tailing means is provided at the tail end of a rotatable drum.
  • the tailing means is intended to receive only a single turn of rope or cable and comprises a circumferential groove and/or a high friction material.
  • An increase in tension in the turn of rope received by the tailing means has the effect of increasing the force with which the same is gripped by the tailing means.
  • the tailing means holds the tail end of rope in position so that, on the one hand, an increase in the tension applied to the load end of the rope will not cause the turns of rope to slip around the drum and, on the other hand, the tail end of the rope will not become slack and, possibly, foul the line.
  • U.S. Patent Specification No. 4,274,606 stresses that the area of increased friction must only be provided at the tail end of the drum, because a number of turns of rope adjacent the tail end might otherwise become slack. Thus, in these previously proposed winches, the rope or cable and the cable bearing surface are subjected to uneven frictional wear.
  • U.K. Patent Specification No. 1,599,521 describes a dual axis quadruple capstan winch in which cable tension is overcome by providing a large number of grooves so that a large number . of turns of cable are borne by the winch.
  • the driving capstans of the winch are disposed on more than one axis, it is difficult correctly to balance the torque applied by the load about the two axes.
  • French Patent Specification FR-A-1105165 discloses a dual access capstan winch with the torque, applied by the load about the two axes, being balanced.
  • this document does not disclose the uneven frictional wear on the cable and cable bearing surface caused by this winch, nor does it suggest a possible solution to this problem.
  • a capstan winch comprising at least two contra-rotatable drivable capstans, one capstan being provided with a rotatable bearing surface for a cable, comprising a single groove, and another capstan being provided with a rotatable bearing surface for a cable comprising a plurality of grooves, the capstan winch further comprising a grooved drum spaced apart from the other capstan, and the grooved drum having a rotational axis substantially parallel to the rotational axis of the other capstan characterised in that the coefficient of friction between the surfaces and the given cable material at a given cable tension varies stepwise in the plurality of grooves along a rotational axis.
  • the winch includes a capstan having a surface the coefficient of friction of which increases along the rotation axis of the capstan. Additionally, or alternatively, the winch comprises a capstan provided with a plurality of circumferential grooves, the cable bearing surface area of each groove being different.
  • the friction acting between the cable and the capstan can be kept at substantially the same level by increasing the coefficient of friction and/or by decreasing the effective contact area (and thus increasing the pressure) between the cable and the capstan.
  • the circumferential grooves are worn at substantially the same rate, facilitating maintenance.
  • the present invention enables the provision of a winch in which cable tension is overcome in relatively few turns of cable, so that a single axis twin capstan winch, which has not been previously proposed, becomes feasible.
  • the present invention also provides a capstan winch in which the driving capstans of the winch are disposed on a single axis and comprise first and second capstans.
  • the first and second capstans are drivable in contrarotation, for example by means of an epicyclic gear train, and a brake is provided for securing the first and second capstans against rotation with respect to each other, so that they act as a single fixed capstan.
  • a brake is provided for securing the first and second capstans against rotation with respect to each other, so that they act as a single fixed capstan.
  • Figure 1 shows a twin capstan winch comprising a first, single groove, capstan 1 and a second capstan 2, sharing a common rotation axis, and a plurality of sheaves or grooved pulleys 3.
  • three sheaves 3 are rotatably mounted on a shaft 4 which is parallel to the common rotation axis of the first and second capstans 1, 2.
  • a fourth sheave 3 is rotatably mounted on a shaft 5 which is slightly offset from that axis to facilitate passing cable over the fourth sheave 3 and the single groove capstan 1.
  • the capstans 1, 2 are adapted to be driven in rotation by means of a motor 6, a sun gear 7 fixed to a drive shaft of the motor 6, a planet gear 8 rotatably mounted on an integral shaft 9 of the second capstan 2 and an internal gear 10 of the first capstan 1.
  • a brake (not shown) is also provided for preventing relative rotation of the capstans 1, 2 if desired.
  • the second capstan 2 is provided with three circumferential grooves 11 which are offset along the capstan rotation axis relative to the grooves of the three sheaves 3 on the parallel shaft 4 by half a groove's width.
  • the circumferential grooves 11 comprise a high friction material and the coefficient of friction increases from the high tension (load) end to the low tension (tail) end of the second capstan 2.
  • Preferred high friction materials include Silumin, which is a high silicon content aluminium such as AL 20 with more than 12% silicon content, and, for use in potentially corrosive environments, high friction polymers such as polyurethanes, polypropylenes and Kautex, which is a polyvinylchloride based material. "Silumin” and “Kautex” are Trade Names.
  • each groove comprises alternating areas of Kautex and Silumin, the former providing the high friction component and the latter serving to support the cable.
  • the coefficient of friction of at least some of the surface of the second capstan 2 for a steel cable should preferably be significantly greater than that of steel on steel.
  • the density decreases exponentially from the high -tension (load) end to the low tension (tail) end of the second capstan 2.
  • the widths of the grooves may also be varied (not shown) so as to vary the pressure between the cable and the surface of each groove at a given cable tension.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Pulleys (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Ropes Or Cables (AREA)
  • Air Bags (AREA)
  • Earth Drilling (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Superheterodyne Receivers (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Chain Conveyers (AREA)
  • Insulated Conductors (AREA)
  • Bridges Or Land Bridges (AREA)
  • Braking Arrangements (AREA)
  • Soil Working Implements (AREA)
  • Window Of Vehicle (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Handcart (AREA)
  • Moulding By Coating Moulds (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Jib Cranes (AREA)
  • Friction Gearing (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Transmission Devices (AREA)
EP84901789A 1983-04-27 1984-04-27 Improvements in or relating to winches Expired EP0150187B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8311454 1983-04-27
GB838311454A GB8311454D0 (en) 1983-04-27 1983-04-27 Winches

Publications (2)

Publication Number Publication Date
EP0150187A1 EP0150187A1 (en) 1985-08-07
EP0150187B1 true EP0150187B1 (en) 1988-02-24

Family

ID=10541768

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84901789A Expired EP0150187B1 (en) 1983-04-27 1984-04-27 Improvements in or relating to winches

Country Status (19)

Country Link
EP (1) EP0150187B1 (da)
JP (1) JPS60501156A (da)
AT (1) ATE32598T1 (da)
AU (1) AU588217B2 (da)
BR (1) BR8406815A (da)
CA (1) CA1246540A (da)
DD (1) DD218340A5 (da)
DE (1) DE3469433D1 (da)
DK (1) DK153021B (da)
FI (1) FI78053C (da)
GB (2) GB8311454D0 (da)
HU (1) HU195162B (da)
IL (1) IL71687A (da)
IN (1) IN160709B (da)
IT (1) IT1174524B (da)
NO (1) NO844918L (da)
RO (1) RO94168B (da)
WO (1) WO1984004291A1 (da)
ZA (1) ZA843155B (da)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TR22347A (tr) * 1984-10-30 1987-02-23 Webb John Thomas H Vinclerde veya vinclerle ilgili gelisme
GB9713669D0 (en) * 1997-06-27 1997-09-03 Lewmar Marine Ltd Winch
NO973054L (no) * 1997-07-01 1999-01-04 Huse As I P Anordning for trekkvinsj
CN102826475B (zh) * 2012-09-10 2015-06-03 江苏科技大学 一种卧式斜置缆绳张力衰减绞车

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2389878A (en) * 1943-12-31 1945-11-27 American Steel & Wire Co Strand engaging drum
US2685801A (en) * 1952-02-28 1954-08-10 Tishman David Sheave tread
FR1105165A (fr) * 1952-10-17 1955-11-28 Entpr S Soc Gen Perfectionnements aux treuils
GB868968A (en) * 1957-04-23 1961-05-25 Gerald Alger Monroe Petersen Apparatus for hauling in or hauling in and paying out transmission cable
DE1221413B (de) * 1961-10-25 1966-07-21 Nautec Corp Seilwinde mit zwei Treibscheiben und einer Speichertrommel
FR1465703A (fr) * 1965-12-03 1967-01-13 Chantiers De Nantes Atel Dispositif de manoeuvre et d'emmagasinage pour câbles, remorques et objets analogues
US3776519A (en) * 1972-01-11 1973-12-04 Fairey Winches Ltd Cable handling apparatus
GB1599521A (en) * 1977-01-20 1981-10-07 Wharton Engs Elstree Ltd Winches
US4230306A (en) * 1978-02-21 1980-10-28 Barlow Marine Limited Self-tailing winch
US4274606A (en) * 1979-08-30 1981-06-23 Hans Bernwall Self-tailing winch
DE3043125A1 (de) * 1980-11-15 1982-07-01 Aktien-Gesellschaft Weser, 2800 Bremen Friktionswinde, insbesondere fuer schiffe

Also Published As

Publication number Publication date
WO1984004291A1 (en) 1984-11-08
DK627384D0 (da) 1984-12-21
IN160709B (da) 1987-08-01
IT8420732A1 (it) 1985-10-27
AU588217B2 (en) 1989-09-14
GB8410905D0 (en) 1984-06-06
HU195162B (en) 1988-04-28
GB2138768B (en) 1986-04-23
ATE32598T1 (de) 1988-03-15
GB8311454D0 (en) 1983-06-02
IL71687A (en) 1987-12-31
EP0150187A1 (en) 1985-08-07
ZA843155B (en) 1984-12-24
FI845058A0 (fi) 1984-12-20
HUT34930A (en) 1985-05-28
RO94168A (ro) 1988-06-30
AU2867084A (en) 1984-11-19
DK627384A (da) 1984-12-21
FI845058L (fi) 1984-12-20
FI78053B (fi) 1989-02-28
BR8406815A (pt) 1985-03-19
DE3469433D1 (en) 1988-03-31
JPS60501156A (ja) 1985-07-25
IT1174524B (it) 1987-07-01
RO94168B (ro) 1988-07-01
FI78053C (fi) 1989-06-12
CA1246540A (en) 1988-12-13
IT8420732A0 (it) 1984-04-27
DK153021B (da) 1988-06-06
GB2138768A (en) 1984-10-31
NO844918L (no) 1984-12-07
DD218340A5 (de) 1985-02-06
IL71687A0 (en) 1984-07-31

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