EP1546017B1 - Capstan winch - Google Patents

Capstan winch Download PDF

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Publication number
EP1546017B1
EP1546017B1 EP03775495A EP03775495A EP1546017B1 EP 1546017 B1 EP1546017 B1 EP 1546017B1 EP 03775495 A EP03775495 A EP 03775495A EP 03775495 A EP03775495 A EP 03775495A EP 1546017 B1 EP1546017 B1 EP 1546017B1
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EP
European Patent Office
Prior art keywords
rings
drums
peripheral
cable
winch
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Expired - Lifetime
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EP03775495A
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German (de)
French (fr)
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EP1546017A1 (en
Inventor
Rémi Blanc
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Kley France
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Kley France
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    • 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

  • the invention relates to a winch type called capstan, including two drums.
  • the invention also relates to the application of such a winch to the so-called "Off-shore” type technologies, generally to petroleum research or similar industries, oceanography and dredging at great depths, etc.
  • Capstan winches simple drum or double drum, have existed for a long time, but have the disadvantage of causing very quickly wear of the driven cable. This is due to the very principle of operation. Indeed the cable is driven by adhesion. As the tension on the cable increases, the cable lengthens and its linear speed increases accordingly. The drive grooves which are provided with the drums of the winch being completely rigid, this results in a relative sliding between the cable and the grooves, resulting in significant wear, and cable, and grooves.
  • winches There are also many types of winches. Known including drum winches (s) mentioned above, capstan, or type called “winch traction” according to the English terminology, and multiple pulleys.
  • the pulley for transmitting a pulling force to a cable.
  • the pulley comprises a wheel and an endless belt wound on the peripheral surface of the wheel to support the cable to be driven.
  • the endless belt is constituted by a succession of spaced pads that can slide with friction on the wheel, each pad being connected to the next by an elastically extensible connecting element, whose longitudinal elastic modulus and / or the dimensions are chosen such so that, in use, the elongation of the endless belt corresponds to that of the cable under a determined maximum voltage.
  • winches capable of driving very heavy loads, typically equal to or greater than 200 T (about 1960 kN), in very deep waters (2000 m to 3000 m, or even 10000 m for some applications).
  • T about 1960 kN
  • winches of this type would deteriorate too quickly.
  • cables have a complex structure. Indeed, with the conventional function of traction or load retention, it is sometimes devolved to cables ancillary functions: energy transport, for example electrical (so-called electro-carrying cables), or transmission of analog or data signals digital, for example via internal optical fibers (so-called opto-carrier cables). It is understood that this type of cable is particularly expensive and that premature wear is not economically acceptable.
  • energy transport for example electrical (so-called electro-carrying cables), or transmission of analog or data signals digital, for example via internal optical fibers (so-called opto-carrier cables). It is understood that this type of cable is particularly expensive and that premature wear is not economically acceptable.
  • the invention aims to overcome the disadvantages of devices of the prior art, some of which have just been recalled, while meeting the needs that are felt, in particular according to claim 1.
  • the object of the invention is to provide a winch which makes it possible, in particular, to lift large loads by means of a cable, while substantially eliminating the slippage due to the elongation of the cable driving said loads, which makes it possible to avoid premature wear.
  • the winch according to the invention implements the technique, known per se, the drive type said two-drum capstan. It is a safe technique, and recognized as such, which allows to enjoy its benefits.
  • the aforementioned rings are provided with peripherally machined grooves in which the cable to drive.
  • the material constituting the rings must have physico-chemical characteristics that allow it to withstand the loads and pressures exerted for a given application, as well as to deform to lengthen the same value as the cable under the same conditions.
  • the friction characteristics must be such that they can safely drive the cable through the drum. No relative movement between the cable and the ring grooves therefore exists. By cons, the body of the ring must be able to slide on the drum (very low relative movement due to elongation).
  • the rings are advantageously offset axially by a fraction of a step, advantageously by a half step, the step being defined by the distance separating the bottom of the grooves from two adjacent rings of the same drum.
  • the axes of the two drums may not be parallel, to further limit friction.
  • the axes form between them an angle of small amplitude, typically between 0.5 ° and 3 °.
  • the number of drums is two, it is possible to design winches with a larger number of drums, without departing from the scope of the invention.
  • the invention therefore has for its main object a winch of the capstan type, comprising at least two drums arranged facing each other, causing a load via a cable wound on said drums in a predetermined number of turns, characterized in that each of said drums comprises a peripheral wall and is provided with a predetermined number of peripheral rings of elastic material, independent of each other, threaded around said peripheral wall, in that said peripheral rings are provided, each , a peripheral groove for receiving said cable, and in that the elastic material constituting said peripheral rings is provided with physico-chemical characteristics such that it allows both a drive of said cable and a relative slip between a lower wall of said peripheral rings in contact with said peripheral wall of the drums and this wall, said slide relative sation being of amplitude substantially equal to longitudinal deformations undergone by said cable, when it is subjected to voltages of variable amplitudes.
  • the invention also relates to the application of such a winch to oil or similar research in deep water, for the descent and / or the rise of significant loads.
  • the figure 1 schematically illustrates the winch 1, in high view and in partial section.
  • This winch 1 comprises two subassemblies each essentially comprising a driving motor, 6 and 7, respectively, and a driving drum of a cable C, 2 and 3, respectively.
  • the drums, 2 and 3 are provided with central rotary shafts, 20 and 30, respectively, about axes of rotation ⁇ 1 and ⁇ 2 .
  • the shafts 20 and 30 are hollow and concentric with driving shafts 60 and 70 driven by the respective motors 6 and 7.
  • the drums, 2 and 3 comprise a cylindrical peripheral wall, 22 and 32, respectively, supported by at least two central radial pieces (two per drums in the example described), 24 and 34, respectively.
  • Pairs of side rings, 21a-21b and 31a-31b, are arranged on either side of the peripheral walls, 22 and 32.
  • peripheral walls, 22 and 32 form with the pair of side rings associated therewith, 21a-21b and 31a-31b, respectively, a groove which will be referred to hereinafter as "throat of a drum ".
  • a series of independent peripheral rings, 40-45 and 50-55 are threaded onto the peripheral walls 22 and 32 in the aforementioned drum grooves, respectively.
  • These rings are made of elastic material, for example a synthetic material.
  • peripheral rings 43 to 45 are substantially planar so as to be in intimate contact with the peripheral walls 22 and 32 (FIG. figure 1 ), drums, 2 and 3.
  • Peripheral rings, 40-45 and 50-55 ( figure 1 ), are provided with machined grooves also at the periphery, two of which are visible on the figure 2 : 4 40 and 450, for the respective rings 44 and 45.
  • These grooves, 440 and 450 preferably having the shape of a "V" rounded at its bottom, are intended to receive the drive cable C.
  • the dimensions are naturally adapted for receiving a type of cable or a range of separate cables.
  • peripheral rings, 40-45 and 50-55 are easy. It is only necessary that the pairs of side rings, 21a-21b and 31a-31b, (at least one of the rings of each pair) are removable, that is to say, removable. It is then enough to thread the peripheral rings, 40-45 and 50-55, on the drums, 2 and 3, around the cylindrical walls, 22 and 32, and to reassemble the lateral rings, 21a-21b and 31a-31b .
  • the side rings, 21a-21b and 31a-31b may be secured to the side walls by any suitable means: screws, etc.
  • the number of rings, 40-45 and 50-55 can be any, it depends only on the number of turns (turns) desired for the cable C around the drums, 2 and 3. It is this number of turns which will constitute the determining factor of the force reduction obtained, in accordance with the well-known operating principle of a capstan.
  • a number of peripheral rings of between five and seven or more.
  • the figure 3 schematically illustrates the operation of a winch 1 according to the embodiment illustrated by the figures 1 and 2 .
  • the cable C is wound in the grooves (440 and 450, figure 2 ) peripheral rings, 40-45 and 50-55, so as to form several loops or turns around the drums, 2 and 3.
  • the output voltage force F can be, for example, 9 T (88 kN approximately) for an input voltage F 'at the input of 3 kN.
  • the cable C is wound up / unwound on or from a storage device (not shown).
  • This member may be chosen from those commonly used in the state of the art and it is unnecessary to describe it further.
  • the material constituting the peripheral rings, 40-45 and 50-55 must be able, at the same time, as was recalled in the preamble of the present description, to support the loads and pressures exerted, deform to lie along with the cable C. In addition, it must have friction characteristics that allow to drive the cable C safely, friction (adhesion).
  • rings 40-45 and 50-55, a synthetic material of polyurethane type, polyethylene or similar.
  • peripheral walls, 22 and 32, drums, 2 and 3 can be made, in particular, stainless steel or ceramic coated steel, which will ensure the aforementioned adhesion.
  • the cable C may be of any type as it has been recalled in the preamble of the present description: steel cable, synthetic material, cable said electro-carrier or opto-carrier, etc., even expensive type. Indeed, premature wear is no longer to be feared.
  • an axial shift equal to half a step is preferably chosen, ie p / 2, as illustrated more particularly by the figure 1 .
  • This arrangement allows a greater limitation of friction.
  • the axes of rotation may not be parallel to each other.
  • the figure 4 illustrates, in side view, an exemplary practical embodiment of a winch according to the invention, more specifically a winch according to a second preferred embodiment.
  • the axes of rotation, here referenced ⁇ ' 1 and ⁇ ' 2 , associated with the drums, here referenced 2 'and 3', form between them an angle of small amplitude ⁇ .
  • the drums, 2 'and 3' are driven by motors, here referenced, 6 'and 7', respectively, via conventional angular gear and gears, referenced globally, 60 'and 70', respectively.
  • the angle ⁇ is typically between 0.5 ° and 3 °.
  • the angle ⁇ is calculated from the above-mentioned step p (see figures 1 and 2 ) of the winding diameter of the cable C.
  • the angle ⁇ is 2.32 °.
  • This arrangement also allows greater limitation of friction.
  • the winch according to the invention has many advantages, which have been previously listed.
  • peripheral rings The parts specific to the invention, essentially the peripheral rings, are simple to produce and to machine, and do not require the use of particularly expensive materials. They are also easily interchangeable, which allows to change the cable used, without major modifications of the winch.
  • the invention is also not limited, as has been indicated, to petroleum research alone or, more generally, to so-called "off-shore” applications at great depth, even if it finds a particularly interesting application in these areas.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Pulleys (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Replacement Of Web Rolls (AREA)
  • Harvester Elements (AREA)
  • Hydraulic Turbines (AREA)
  • Jib Cranes (AREA)
  • Ropes Or Cables (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

The invention concerns a so-called capstan winch ( 1 ) comprising drums ( 2, 3 ) driving a cable (C) and provided with a peripheral wall ( 22, 32 ) around which are strung independent peripheral rings ( 40-45, 50-55 ). Said rings are provided with a peripheral groove designed to receive the cable (C) and are made of an elastic material so as to allow both the cable (C) to be driven and a relative sliding movement between the peripheral rings ( 40-45, 50-55 ) and the peripheral wall ( 22, 32 ), the relative sliding movement being of amplitude substantially equal to longitudinal deformation of the cable (C), when it is subjected to tension stresses. The two drums ( 2, 3 ) can be axially offset relative to each other (p/2) and their axes of rotation (Delta<SUB>1</SUB>, Delta<SUB>2</SUB>), may form a non-null angle of inclination. The invention is particular applicable to deep sea oil exploration.

Description

L'invention concerne un treuil du type dit à cabestan, notamment à deux tambours.The invention relates to a winch type called capstan, including two drums.

Elle s'applique plus particulièrement à un treuil destiné à entraîner des très fortes charges par l'intermédiaire d'un câble, une partie non négligeable de la charge précitée étant d'ailleurs souvent constituée par le poids du câble, généralement de fort diamètre et de très grande longueur une fois déroulé.It applies more particularly to a winch intended to drive very heavy loads via a cable, a significant part of the aforementioned load is also often constituted by the weight of the cable, generally of large diameter and very long once unrolled.

L'invention concerne encore l'application d'un tel treuil aux technologies du type dit "Off-shore", de façon générale aux industries de recherche pétrolière ou similaire, à l'océanographie et aux dragages en grandes profondeurs, etc.The invention also relates to the application of such a winch to the so-called "Off-shore" type technologies, generally to petroleum research or similar industries, oceanography and dredging at great depths, etc.

Dans le cadre de l'invention, le terme "treuil" doit être compris dans son sens le plus général.In the context of the invention, the term "winch" must be understood in its most general sense.

Pour fixer les idées, on se placera dans ce qui suit dans le cas de l'application préférée de l'invention, à savoir la recherche pétrolière nécessitant des descentes et/ou remontées de charges en grandes profondeurs.To fix the ideas, it will be placed in what follows in the case of the preferred application of the invention, namely oil research requiring descents and / or lifts of loads in great depths.

Les treuils à cabestan, de types simple tambour ou double tambour, existent depuis longtemps, mais présentent l'inconvénient de provoquer très rapidement des usures du câble entraîné. Ceci est dû au principe même de fonctionnement. En effet le câble est entraîné par adhérence. Au fur et à mesure que la tension qui s'exerce sur le câble augmente, celui-ci s'allonge et sa vitesse linéaire augmente d'autant. Les gorges d'entraînement dont sont munis les tambours du treuil étant totalement rigides, il en résulte un glissement relatif entre le câble et les gorges, d'où une usure importante, et du câble, et des gorges.Capstan winches, simple drum or double drum, have existed for a long time, but have the disadvantage of causing very quickly wear of the driven cable. This is due to the very principle of operation. Indeed the cable is driven by adhesion. As the tension on the cable increases, the cable lengthens and its linear speed increases accordingly. The drive grooves which are provided with the drums of the winch being completely rigid, this results in a relative sliding between the cable and the grooves, resulting in significant wear, and cable, and grooves.

En vue d'essayer de pallier ces inconvénients, il a été proposé, dans l'art connu, de nombreuses modifications. Des améliorations ont été apportées à ce type de treuil pour limiter le glissement, mais sans jamais le supprimer tout à fait.In an attempt to overcome these disadvantages, it has been proposed in the known art many modifications. Improvements have been made to this type of winch to limit slippage, but never completely remove it.

Il existe d'ailleurs de nombreux types de treuils. On connaît notamment les treuils à tambour(s) rappelés ci-dessus, à cabestan, ou de type dit "traction winch" selon la terminologie anglo-saxonne, et à poulies multiples.There are also many types of winches. Known including drum winches (s) mentioned above, capstan, or type called "winch traction" according to the English terminology, and multiple pulleys.

Dans le brevet français N° 90 14 612 , publié sous le numéro FR 2 669 701 B1 , intitulé : "Poulie d'adhérence", la Demanderesse a proposé une poulie permettant de transmettre une force de traction à un câble. La poulie comprend une roue et une bande sans fin enroulée sur la surface périphérique de la roue pour supporter le câble à entraîner. La bande sans fin est constituée par une succession de patins espacés pouvant glisser avec frottement sur la roue, chaque patin étant relié au suivant par un élément de liaison extensible élastiquement, dont le module d'élasticité longitudinale et/ou les dimensions sont choisis de telle sorte que, en service, l'allongement de la bande sans fin corresponde à celui du câble sous une tension maximale déterminée.In French Patent No. 90 14 612 published under the number FR 2 669 701 B1 , entitled: "Pulley of adhesion", the Applicant has proposed a pulley for transmitting a pulling force to a cable. The pulley comprises a wheel and an endless belt wound on the peripheral surface of the wheel to support the cable to be driven. The endless belt is constituted by a succession of spaced pads that can slide with friction on the wheel, each pad being connected to the next by an elastically extensible connecting element, whose longitudinal elastic modulus and / or the dimensions are chosen such so that, in use, the elongation of the endless belt corresponds to that of the cable under a determined maximum voltage.

Pour une description plus détaillée des caractéristiques de ce dispositif, on se reportera avec profit au brevet précité.For a more detailed description of the characteristics of this device, reference will be made to the aforementioned patent.

Ces dispositions permettent de supprimer pratiquement tout glissement. Des treuils mettant en oeuvre la technologie enseignée par le brevet ont d'ailleurs été réalisés et utilisés. Ils répondent tout à fait aux buts que s'est fixé le brevet ci-dessus, du moins pour une gamme d'applications bien déterminée.These provisions make it possible to virtually eliminate any slippage. Winches using the technology taught by the patent have been made and used. They fully meet the goals of the above patent, at least for a specific range of applications.

En effet, la technologie mise en oeuvre ne permet pas de fabriquer des treuils susceptibles de soulever des charges supérieures à 50 Tonnes (490 kN environ). De plus, ce type de treuil est assez sensible et quelque peu instable en utilisation. Enfin, on peut constater dans certaines circonstances des échauffements importants du fait du glissement de la bande sans fin, notamment sur les bords du tambour.In fact, the technology used does not make it possible to manufacture winches capable of lifting loads greater than 50 tons (approximately 490 kN). In addition, this type of winch is quite sensitive and somewhat unstable in use. Finally, it can be seen in certain circumstances significant heating due to the sliding of the endless belt, particularly on the edges of the drum.

Or, actuellement, les industries de recherche pétrolières, notamment, nécessitent des treuils capables d'entraîner de très fortes charges, typiquement égales ou supérieures à 200 T (1960 kN environ), ce en eaux très profondes (2000 m à 3000 m, voire 10000 m pour certaines applications). Seuls des câbles synthétiques (dont le poids apparent dans l'eau est très faible, voire nul) peuvent être utilisés pour ce type d'applications. Cependant, ces câbles sont très onéreux, ce qui exclut l'utilisation de treuils classiques. En effet, comme précédemment rappelé, des treuils de ce type les détérioreraient trop rapidement.Now, the petroleum research industries, in particular, require winches capable of driving very heavy loads, typically equal to or greater than 200 T (about 1960 kN), in very deep waters (2000 m to 3000 m, or even 10000 m for some applications). Only synthetic cables (whose apparent weight in water is very low or even zero) can be used for this type of application. However, these cables are very expensive, which excludes the use of conventional winches. Indeed, as previously recalled, winches of this type would deteriorate too quickly.

Enfin, certains câbles sont dotés d'une structure complexe. En effet, à la fonction classique de traction ou de retenue de charges, il est parfois dévolu aux câbles des fonctions annexes : transport d'énergie, par exemple électrique (câbles dits électro-porteurs), ou transmission de signaux analogiques ou de données numériques, par exemple via des fibres optiques internes (câbles dits opto-porteurs). On conçoit que ce type de câble soit particulièrement onéreux et qu'une usure prématurée n'est pas admissible économiquement.Finally, some cables have a complex structure. Indeed, with the conventional function of traction or load retention, it is sometimes devolved to cables ancillary functions: energy transport, for example electrical (so-called electro-carrying cables), or transmission of analog or data signals digital, for example via internal optical fibers (so-called opto-carrier cables). It is understood that this type of cable is particularly expensive and that premature wear is not economically acceptable.

Dans l'Art connu, on a proposé divers systèmes de treuils du type à cabestan comprenant des anneaux démontables.In the known art, various systems of winches of the capstan type comprising removable rings have been proposed.

On peut citer, à titre d'exemple non limitatif les brevets suivants :

  • le brevet américain US-A-3 843 096 (Wilson et al. ) : ce brevet enseigne l'utilisation d'anneaux démontables mais le glissement de ces anneaux entre eux n'est rendu possible que dans le seul but de limiter la tension du câble ou de "l'écrêter". En outre, les anneaux ne sont pas en matériau élastique. Seuls le premier ou les premiers anneaux voient leurs gorges revêtues, en surface d'un matériau élastomère, pour obtenir un effet dit de « lining ».
  • le brevet français FR-A-1 105 165 (SOCIET GENERALE D'ENTREPRISES) : ce brevet enseigne un treuil à deux tambours à rainures sur lesquels le câble est enroulé. Dans ce brevet, l'allongement du câble, localement, c'est à dire à l'échelle d'une gorge (un demi tour de cabestan) n'est pas pris en compte puisque la vitesse est constante, la gorge n'étant pas élastique.
By way of nonlimiting example, the following patents may be mentioned:
  • the US patent US-A-3,843,096 (Wilson et al. ): this patent teaches the use of removable rings but the sliding of these rings between them is made possible only for the sole purpose of limiting the cable tension or "clipping". In addition, the rings are not made of elastic material. Only the first or the first rings have their grooves coated on the surface of an elastomeric material to obtain a so-called "lining" effect.
  • the French patent FR-A-1 105 165 (SOCIET GENERALE DE ENTREPRISES): This patent teaches a winch with two grooved drums on which the cable is wound. In this patent, the elongation of the cable, locally, that is to say at the scale of a groove (a half turn of capstan) is not taken into account since the speed is constant, the throat being not elastic.

L'invention vise à pallier les inconvénients des dispositifs de l'art connu, et dont certains viennent d'être rappelés, tout en répondant aux besoins qui se font sentir, notamment selon la revendication 1.The invention aims to overcome the disadvantages of devices of the prior art, some of which have just been recalled, while meeting the needs that are felt, in particular according to claim 1.

L'invention se fixe pour but un treuil permettant, notamment, de soulever des charges importantes, par l'intermédiaire d'un câble, tout en supprimant substantiellement les glissements dus à l'allongement du câble entraînant lesdites charges, ce qui permet d'éviter une usure prématurée.The object of the invention is to provide a winch which makes it possible, in particular, to lift large loads by means of a cable, while substantially eliminating the slippage due to the elongation of the cable driving said loads, which makes it possible to avoid premature wear.

Pour ce faire, selon une première caractéristique importante, le treuil selon l'invention met en oeuvre la technique, connue en soi, de l'entraînement du type dit cabestan à deux tambours. Il s'agit d'une technique sûre, et reconnue comme telle, ce qui permet de profiter de ses avantages.To do this, according to a first important characteristic, the winch according to the invention implements the technique, known per se, the drive type said two-drum capstan. It is a safe technique, and recognized as such, which allows to enjoy its benefits.

Selon une deuxième caractéristique importante, on met en oeuvre une série d'anneaux fermés indépendants, en matériau à propriété élastique, concentriques aux deux tambours. Cette disposition permet de conserver les avantages inhérents au dispositif objet du brevet français N° 90 14 612 précité, à savoir pouvoir éviter les glissements relatifs entre la gorge et le câble, tout en évitant les inconvénients rappelés.According to a second important characteristic, a series of independent closed rings made of material with an elastic property, concentric with the two drums, is used. This provision makes it possible to retain the advantages inherent in the device that is the subject of the French patent N ° 90 14 612 aforementioned, namely to be able to avoid relative slippage between the throat and the cable, while avoiding the disadvantages recalled.

Les anneaux précités sont munis de gorges usinées en périphérie dans lesquelles s'insèrent le câble à entraîneur.The aforementioned rings are provided with peripherally machined grooves in which the cable to drive.

Le matériau constituant les anneaux doit avoir des caractéristiques physico-chimiques qui lui permettent de supporter les charges et les pressions exercées, pour une application donnée, ainsi que de se déformer pour s'allonger de la même valeur que le câble dans les mêmes conditions.The material constituting the rings must have physico-chemical characteristics that allow it to withstand the loads and pressures exerted for a given application, as well as to deform to lengthen the same value as the cable under the same conditions.

Par ailleurs, les caractéristiques de frottement doivent être telles qu'elles permettent d'entraîner en toute sécurité le câble par le tambour. Aucun mouvement relatif entre le câble et les gorges des anneaux n'existe donc. Par contre, le corps de l'anneau doit pouvoir glisser sur le tambour (mouvement relatif très faible dû à l'allongement).In addition, the friction characteristics must be such that they can safely drive the cable through the drum. No relative movement between the cable and the ring grooves therefore exists. By cons, the body of the ring must be able to slide on the drum (very low relative movement due to elongation).

Dans une variante préférée de réalisation de l'invention, afin de réduire au maximum les frottements du câble sur les gorges, les anneaux sont avantageusement décalés axialement d'une fraction d'un pas, avantageusement d'un demi pas, le pas étant défini par la distance séparant les fond des gorges de deux anneaux adjacents d'un même tambour.In a preferred embodiment of the invention, in order to minimize the friction of the cable on the grooves, the rings are advantageously offset axially by a fraction of a step, advantageously by a half step, the step being defined by the distance separating the bottom of the grooves from two adjacent rings of the same drum.

Dans une variante préférée encore, les axes des deux tambours peuvent ne pas être parallèles, afin de limiter encore plus les frottements. En d'autres termes les axes forment entre eux un angle de faible amplitude, typiquement entre 0,5 ° et 3°.In a still preferred embodiment, the axes of the two drums may not be parallel, to further limit friction. In other words, the axes form between them an angle of small amplitude, typically between 0.5 ° and 3 °.

Enfin, bien que dans un mode de réalisation préféré, le nombre de tambours est égal à deux, il est possible de concevoir des treuils comportant un plus grand nombre de tambours, sans sortir du cadre de l'invention.Finally, although in a preferred embodiment, the number of drums is two, it is possible to design winches with a larger number of drums, without departing from the scope of the invention.

Du fait des dispositions adoptées, l'invention présente de nombreux avantages, parmi lesquels les suivants :

  • il est possible de travailler avec n'importe quel type de câbles : acier, synthétiques, normaux, électro-porteurs ou opto-porteurs, etc. ;
  • il est possible de recourir à de très grands diamètres d'enroulement ;
  • on ne constate, comme il a été rappelé, aucun mouvement de glissement relatif entre le câble et la gorge des anneaux, ou pour le moins d'amplitude négligeable ;
  • les anneaux ne subissent qu'un infime déplacement circonférentiel sur le tambour, mais aucun déplacement axial, contrairement à un treuil à bande conforme au brevet français N° 90 14 612 précité : cette caractéristique permet de limiter considérablement l'échauffement de la bande, ainsi que son usure déjà très limitée ;
  • de même l'absence de déplacement axial permet de supprimer les roulements de déviation qui étaient nécessaires dans le cas d'un treuil à bande, roulements fragiles et onéreux ;
  • la quasi-absence d'échauffement permet aussi de supprimer tous systèmes de refroidissement du tambour ;
  • l'utilisation d'un treuil conforme à l'invention est très simple, sure et fiable, et ne nécessite pas la présence de personnel spécialisé en permanence ;
  • les anneaux sont simples à produire et à usiner ; et
  • ils sont facilement interchangeables, ce qui permet de changer de câble utilisé (diamètre et/ou type) sans modifications majeures du treuil proprement dit.
Because of the provisions adopted, the invention has many advantages, among which are the following:
  • it is possible to work with any type of cable: steel, synthetic, normal, electro-carrier or opto-carrier, etc. ;
  • it is possible to use very large winding diameters;
  • it is not observed, as has been recalled, no relative sliding movement between the cable and the groove of the rings, or at least of negligible amplitude;
  • the rings undergo only a small circumferential movement on the drum, but no axial displacement, unlike a belt winch according to French Patent No. 90 14 612 mentioned above: this characteristic makes it possible to considerably limit the heating of the strip, as well as its already very limited wear;
  • likewise, the absence of axial displacement makes it possible to eliminate the deflection bearings that were necessary in the case of a belt winch, fragile and expensive bearings;
  • the virtual absence of heating also eliminates all drum cooling systems;
  • the use of a winch according to the invention is very simple, safe and reliable, and does not require the presence of specialized personnel permanently;
  • the rings are simple to produce and machine; and
  • they are easily interchangeable, which makes it possible to change the cable used (diameter and / or type) without major modifications of the winch proper.

L'invention a donc pour objet principal un treuil du type dit à cabestan, comprenant au moins deux tambours disposés en vis-à-vis entraînant une charge par l'intermédiaire d'un câble enroulé sur lesdits tambours en un nombre prédéterminé de spires, caractérisé en ce que chacun desdits tambours comprend une paroi périphérique et est muni d'un nombre prédéterminé d'anneaux périphériques en matériau élastique, indépendants les uns des autres, enfilés autour de ladite paroi périphérique, en ce que lesdits anneaux périphériques sont munis, chacun, d'une gorge périphérique destinée à recevoir ledit câble, et en ce que le matériau élastique constituant lesdits anneaux périphériques est doté de caractéristiques physico-chimiques telles qu'il permet, à la fois, un entraînement dudit câble et un glissement relatif entre une paroi inférieure desdits anneaux périphériques en contact avec ladite paroi périphérique des tambours et cette paroi, ledit glissement relatif étant d'amplitude sensiblement égale à des déformations longitudinales subies par ledit câble, lorsqu'il est soumis à des tensions d'amplitudes variables.The invention therefore has for its main object a winch of the capstan type, comprising at least two drums arranged facing each other, causing a load via a cable wound on said drums in a predetermined number of turns, characterized in that each of said drums comprises a peripheral wall and is provided with a predetermined number of peripheral rings of elastic material, independent of each other, threaded around said peripheral wall, in that said peripheral rings are provided, each , a peripheral groove for receiving said cable, and in that the elastic material constituting said peripheral rings is provided with physico-chemical characteristics such that it allows both a drive of said cable and a relative slip between a lower wall of said peripheral rings in contact with said peripheral wall of the drums and this wall, said slide relative sation being of amplitude substantially equal to longitudinal deformations undergone by said cable, when it is subjected to voltages of variable amplitudes.

L'invention a encore pour objet l'application d'un tel treuil à la recherche pétrolière ou similaire en eau profonde, pour la descente et/ou la remontée de charges importantes.The invention also relates to the application of such a winch to oil or similar research in deep water, for the descent and / or the rise of significant loads.

L'invention va maintenant être décrite de façon plus détaillée en se référant aux dessins annexés, parmi lesquels :

  • la figure 1 illustre schématiquement un exemple de réalisation d'un treuil selon un premier mode de réalisation préféré de l'invention, en vue de haut et en coupe partielle ;
  • la figure 2 est une vue de détail du treuil de la figure 1, illustrant plus particulièrement les anneaux indépendants en matériau élastique munis de gorges périphériques destinées à recevoir un câble ;
  • la figure 3 illustre schématiquement le fonctionnement du treuil des figures 1 et 2 ; et
  • la figure 4 illustre, en vue de côté, un deuxième mode de réalisation préféré de treuil selon l'invention.
The invention will now be described in more detail with reference to the accompanying drawings, in which:
  • the figure 1 schematically illustrates an embodiment of a winch according to a first preferred embodiment of the invention, in view of high and partial section;
  • the figure 2 is a detail view of the winch of the figure 1 , more particularly illustrating the independent rings of elastic material provided with peripheral grooves for receiving a cable;
  • the figure 3 schematically illustrates the operation of the winch figures 1 and 2 ; and
  • the figure 4 illustrates, in side view, a second preferred embodiment of winch according to the invention.

Dans ce qui suit, sans en limiter en quoi que ce soit la portée, on se placera ci-après dans le cadre de l'application préférée de l'invention, sauf mention contraire, c'est-à-dire dans le cas des applications dites "off-shore" : recherche pétrolière ou similaire impliquant des descentes et/ou remontées de charges en grandes profondeurs, par l'intermédiaire d'un câble.In the following, without limiting in any way the scope, it will be placed below in the context of the preferred application of the invention, unless otherwise stated, that is to say in the case of so-called "off-shore" applications: petroleum or similar research involving descents and / or lifts at great depths, via a cable.

Un exemple d'un premier mode de réalisation préféré d'un treuil conforme à l'invention va être décrit par référence aux figures 1 à 3.An example of a first preferred embodiment of a winch according to the invention will be described with reference to the Figures 1 to 3 .

Sur ces figures, les éléments identiques portent les mêmes références et ne seront re-décrits qu'en tant que de besoin.In these figures, the identical elements bear the same references and will be re-described only as necessary.

La figure 1 illustre schématiquement le treuil 1, en vue de haut et en coupe partielle. Ce treuil 1 comporte deux sous-ensembles comprenant chacun essentiellement un moteur d'entraînement, 6 et 7, respectivement, et un tambour d'entraînement d'un câble C, 2 et 3, respectivement.The figure 1 schematically illustrates the winch 1, in high view and in partial section. This winch 1 comprises two subassemblies each essentially comprising a driving motor, 6 and 7, respectively, and a driving drum of a cable C, 2 and 3, respectively.

Cet ensemble présente donc la structure générale, connue en soi, d'un treuil dit "bi-cabestan". Il en conserve également les avantages, également bien connus, comme il a été rappelé.This set therefore has the general structure, known per se, of a winch called "bi-capstan". It also retains the benefits, also well known, as it has been recalled.

Les tambours, 2 et 3, sont munis d'arbres rotatifs centraux, 20 et 30, respectivement, autour d'axes de rotation Δ1 et Δ2. Dans l'exemple décrit, les arbres, 20 et 30 sont creux et concentriques à des arbres d'entraînement, 60 et 70, mus par les moteurs respectifs 6 et 7.The drums, 2 and 3, are provided with central rotary shafts, 20 and 30, respectively, about axes of rotation Δ 1 and Δ 2 . In the example described, the shafts 20 and 30 are hollow and concentric with driving shafts 60 and 70 driven by the respective motors 6 and 7.

Il doit être clair que, dans un mode de réalisation pratique, des organes de démultiplication du type engrenages, boîte de vitesse ou similaires peuvent être avantageusement prévus. Cet aspect sort du cadre strict de l'invention et est à la portée de l'homme de métier. Il s'agit de dispositions communes, en soi, à l'art connu. Il est donc inutile de les décrire plus avant.It should be clear that, in a practical embodiment, gears, gearboxes or the like can be advantageously provided. This aspect is beyond the scope of the invention and is within the reach of the skilled person. These are common provisions, in themselves, to the known art. It is therefore unnecessary to describe them further.

Les tambours, 2 et 3, comprennent une paroi périphérique cylindrique, 22 et 32, respectivement, soutenue par au moins deux pièces radiales centrales (deux par tambours dans l'exemple décrit), 24 et 34, respectivement.The drums, 2 and 3, comprise a cylindrical peripheral wall, 22 and 32, respectively, supported by at least two central radial pieces (two per drums in the example described), 24 and 34, respectively.

Des paires d'anneaux latéraux, 21a-21b et 31 a-31 b, sont disposés de part et d'autre des parois périphériques, 22 et 32.Pairs of side rings, 21a-21b and 31a-31b, are arranged on either side of the peripheral walls, 22 and 32.

Chacune des parois périphériques, 22 et 32, forme avec la paire d'anneaux latéraux qui lui est associée, 21 a-21 b et 31 a-31 b, respectivement, une gorge que l'on appellera ci-après "gorge de tambour".Each of the peripheral walls, 22 and 32, form with the pair of side rings associated therewith, 21a-21b and 31a-31b, respectively, a groove which will be referred to hereinafter as "throat of a drum ".

Selon une caractéristique importante de l'invention, on enfile sur les parois périphériques, 22 et 32, dans les gorges de tambour précitées, une série d'anneaux périphériques indépendants, 40-45 et 50-55, respectivement. Ces anneaux sont réalisés en matériau élastique, par exemple un matériau synthétique.According to an important characteristic of the invention, a series of independent peripheral rings, 40-45 and 50-55, are threaded onto the peripheral walls 22 and 32 in the aforementioned drum grooves, respectively. These rings are made of elastic material, for example a synthetic material.

Comme le montre plus particulièrement la figure de détail 2, les parois inférieures, par exemple 431 à 451, des anneaux périphériques, 43 à 45, sont substantiellement planes, de manière à se trouver en contact intime avec les parois périphériques, 22 et 32 (figure 1), des tambours, 2 et 3.As shown more particularly in detail figure 2, the lower walls, for example 431 to 451, peripheral rings 43 to 45 are substantially planar so as to be in intimate contact with the peripheral walls 22 and 32 (FIG. figure 1 ), drums, 2 and 3.

Les anneaux périphériques, 40-45 et 50-55 (figure 1), sont munis de gorges usinées également en périphérie, dont deux sont visibles sur la figure 2 : 440 et 450, pour les anneaux respectifs 44 et 45. Ces gorges, 440 et 450, ayant avantageusement la forme d'un "V" arrondi en son fond, sont destinées à recevoir le câble C d'entraînement. Les dimensions (profondeur, largeur, rayon du cercle de fond, etc.) sont naturellement adaptées pour la réception d'un type de câble, voire d'une gamme de câbles distincts.Peripheral rings, 40-45 and 50-55 ( figure 1 ), are provided with machined grooves also at the periphery, two of which are visible on the figure 2 : 4 40 and 450, for the respective rings 44 and 45. These grooves, 440 and 450, preferably having the shape of a "V" rounded at its bottom, are intended to receive the drive cable C. The dimensions (depth, width, radius of the bottom circle, etc.) are naturally adapted for receiving a type of cable or a range of separate cables.

On comprend aisément que le montage (insertion et positionnement) d'anneaux périphériques, 40-45 et 50-55, ou leur remplacement, par des anneaux identiques (pour des raisons de maintenance, par exemple) ou par des anneaux différents (par exemple, pour accepter un câble de type et/ou de diamètre également différent), est aisé. Il est seulement nécessaire que les paires d'anneaux latéraux, 21a-21b et 31a-31b, (pour le moins un des anneaux de chaque paire) soient amovibles, c'est-à-dire démontables. Il suffit alors d'enfiler les anneaux périphériques, 40-45 et 50-55, sur les tambours, 2 et 3, autour des parois cylindriques, 22 et 32, et de remonter les anneaux latéraux, 21a-21 b et 31a-31b.It is easy to understand that the mounting (insertion and positioning) of peripheral rings, 40-45 and 50-55, or their replacement, by identical rings (for maintenance reasons, for example) or by different rings (for example , to accept a cable of type and / or diameter also different), is easy. It is only necessary that the pairs of side rings, 21a-21b and 31a-31b, (at least one of the rings of each pair) are removable, that is to say, removable. It is then enough to thread the peripheral rings, 40-45 and 50-55, on the drums, 2 and 3, around the cylindrical walls, 22 and 32, and to reassemble the lateral rings, 21a-21b and 31a-31b .

Les anneaux latéraux, 21 a-21 b et 31 a-31 b, peuvent être assujettis aux parois latérales par tous organes appropriés : vis, etc.The side rings, 21a-21b and 31a-31b, may be secured to the side walls by any suitable means: screws, etc.

A priori, le nombre d'anneaux, 40-45 et 50-55, peut être quelconque, il ne dépend que du nombre de tours (spires) souhaité pour le câble C autour des tambours, 2 et 3. C'est ce nombre de tours qui va constituer le facteur déterminant de la démultiplication de force obtenue, conformément au principe de fonctionnement bien connu d'un cabestan. Pour fixer les idées et à titre d'exemple, on choisit typiquement un nombre d'anneaux périphériques compris entre cinq et sept, voire plus. A priori, the number of rings, 40-45 and 50-55, can be any, it depends only on the number of turns (turns) desired for the cable C around the drums, 2 and 3. It is this number of turns which will constitute the determining factor of the force reduction obtained, in accordance with the well-known operating principle of a capstan. To fix the ideas and by way of example, one typically chooses a number of peripheral rings of between five and seven or more.

La figure 3 illustre schématiquement le fonctionnement d'un treuil 1 conforme au mode de réalisation illustré par les figures 1 et 2. Le câble C est enroulé dans les gorges (440 et 450, figure 2) des anneaux périphériques, 40-45 et 50-55, de façon à former plusieurs boucles ou spires autour des tambours, 2 et 3. Pour fixer les idées, du fait de la démultiplication obtenue par cette disposition, la force de tension en sortie F peut être, par exemple de 9 T (88 kN environ) pour une force de tension F' en entrée de 3 kN.The figure 3 schematically illustrates the operation of a winch 1 according to the embodiment illustrated by the figures 1 and 2 . The cable C is wound in the grooves (440 and 450, figure 2 ) peripheral rings, 40-45 and 50-55, so as to form several loops or turns around the drums, 2 and 3. To fix the ideas, because of the reduction achieved by this arrangement, the output voltage force F can be, for example, 9 T (88 kN approximately) for an input voltage F 'at the input of 3 kN.

En entrée, le câble C est enroulé/déroulé sur ou à partir d'un dispositif de stockage (non représenté). Cet organe peut être choisi parmi ceux utilisés communément dans l'état de la technique et il est inutile de le décrire plus avant.As input, the cable C is wound up / unwound on or from a storage device (not shown). This member may be chosen from those commonly used in the state of the art and it is unnecessary to describe it further.

Toujours selon une des caractéristiques importantes de l'invention, le matériau constitutif des anneaux périphériques, 40-45 et 50-55, doit pouvoir, à la fois, comme il a été rappelé dans le préambule de la présente description, supporter les charges et pressions exercées, se déformer pour s'allonger en même temps que le câble C. En outre, il doit posséder des caractéristiques de frottement qui permettent d'entraîner le câble C en toute sécurité, par friction (adhérence).Still according to one of the important features of the invention, the material constituting the peripheral rings, 40-45 and 50-55, must be able, at the same time, as was recalled in the preamble of the present description, to support the loads and pressures exerted, deform to lie along with the cable C. In addition, it must have friction characteristics that allow to drive the cable C safely, friction (adhesion).

Il s'agit donc d'exigences, a priori antinomiques, mais qui peuvent être satisfaites par un compromis, notamment par un choix approprié du matériau constitutif des anneaux périphériques, 40-45 et 50-55, et de celui des parois périphériques, 22 et 32, des tambours, 2 et 3.It is therefore a question, a priori antinomic, but which can be satisfied by a compromise, in particular by a suitable choice of the material constituting the peripheral rings, 40-45 and 50-55, and that of the peripheral walls, 22 and 32, drums, 2 and 3.

Pour fixer les idées, on peut choisir pour les anneaux, 40-45 et 50-55, un matériau synthétique de type polyuréthane, polyéthylène ou similaire.To fix the ideas, one can choose for the rings, 40-45 and 50-55, a synthetic material of polyurethane type, polyethylene or similar.

De même les parois périphériques, 22 et 32, des tambours, 2 et 3, peuvent être réalisées, notamment, en acier inoxydable ou en acier revêtu de céramique, ce qui assurera l'adhérence précitée.Similarly, the peripheral walls, 22 and 32, drums, 2 and 3, can be made, in particular, stainless steel or ceramic coated steel, which will ensure the aforementioned adhesion.

Le câble C, et ceci constitue un avantage supplémentaire, peut être de type quelconque comme il a été rappelé dans le préambule de la présente description : câble en acier, en matériau synthétique, câble dit électro-porteur ou opto-porteur, etc, même de type onéreux. En effet, une usure prématurée n'est plus à craindre.The cable C , and this is an additional advantage, may be of any type as it has been recalled in the preamble of the present description: steel cable, synthetic material, cable said electro-carrier or opto-carrier, etc., even expensive type. Indeed, premature wear is no longer to be feared.

Dans le mode de réalisation préféré, comme illustré par les figures 1 à2, selon une caractéristique avantageuse, on peut prévoir un décalage axial, c'est-à dire suivant une direction parallèle aux axes Δ1 et Δ2 que l'on a implicitement supposé, jusqu'à ce point de la description, parallèles entre eux.In the preferred embodiment, as illustrated by the figures 1 to 2, according to an advantageous characteristic, it is possible to provide an axial offset, that is to say along a direction parallel to the axes Δ 1 and Δ 2 that have been implicitly assumed, up to this point of the description, parallel between them.

Si on appelle p le pas entre deux anneaux périphériques adjacents d'un même tambour, c'est-à-dire la distance séparant deux fonds de gorges (voir par exemple figure 2 : gorges 440 et 450), on choisit préférentiellement un décalage axial égal à un demi pas, soit p/2, comme illustré plus particulièrement par la figure 1.If we call p the pitch between two adjacent peripheral rings of the same drum, that is to say the distance between two bases of the grooves (see e.g. figure 2 grooves 440 and 450), an axial shift equal to half a step is preferably chosen, ie p / 2, as illustrated more particularly by the figure 1 .

Cette disposition permet une plus grande limitation des frottements.This arrangement allows a greater limitation of friction.

De même, les axes de rotation peuvent ne pas être parallèles entre eux.Similarly, the axes of rotation may not be parallel to each other.

La figure 4 illustre, en vue de côté, un exemple de réalisation pratique d'un treuil conforme à l'invention, plus précisément un treuil selon un deuxième mode de réalisation préféré.The figure 4 illustrates, in side view, an exemplary practical embodiment of a winch according to the invention, more specifically a winch according to a second preferred embodiment.

Sur cette figure, seuls les éléments indispensables à la bonne compréhension de l'invention ont été référencés.In this figure, only the elements essential to the proper understanding of the invention have been referenced.

Selon la particularité essentielle de ce deuxième mode de réalisation préféré, les axes de rotation, ici référencés Δ'1 et Δ'2, associés aux tambours, ici référencés 2' et 3', forment entre eux un angle de faible amplitude α. Les tambours, 2' et 3', sont entraînés par des moteurs, ici référencés, 6' et 7', respectivement, via des organes classiques de report d'angle et d'engrenages, référencés globalement, 60' et 70', respectivement.According to the essential feature of this second preferred embodiment, the axes of rotation, here referenced Δ ' 1 and Δ' 2 , associated with the drums, here referenced 2 'and 3', form between them an angle of small amplitude α. The drums, 2 'and 3', are driven by motors, here referenced, 6 'and 7', respectively, via conventional angular gear and gears, referenced globally, 60 'and 70', respectively.

Pour fixer les idées, l'angle α est typiquement compris entre 0,5 ° et 3 °. L'angle α est calculé à partir du pas p précité (voir figures 1 et 2) du diamètre d'enroulement du câble C. Toujours pour fixer les idées, dans l'exemple illustré sur la figure 4, l'angle α est égal à 2,32°.To fix the ideas, the angle α is typically between 0.5 ° and 3 °. The angle α is calculated from the above-mentioned step p (see figures 1 and 2 ) of the winding diameter of the cable C. Always to fix the ideas, in the example illustrated on the figure 4 the angle α is 2.32 °.

Cette disposition permet également une plus grande limitation des frottements.This arrangement also allows greater limitation of friction.

En outre, elle est tout à fait compatible, et donc cumulable, avec la disposition précédemment décrite consistant à effectuer un décalage axial, préférentiellement d'un demi-pas p/2.In addition, it is entirely compatible, and therefore cumulative, with the provision previously described consisting in performing an axial shift, preferably a half-step p / 2.

A la lecture de ce qui précède, on constate aisément que l'invention atteint bien les buts qu'elle s'est fixés.From the foregoing, it is easy to see that the invention achieves the goals it has set for itself.

Le treuil selon l'invention présente de nombreux avantages, qui ont été précédemment énumérés.The winch according to the invention has many advantages, which have been previously listed.

Sans tous les rappeler, on mettra l'accent sur le fait qu'il permet de réduire au maximum les frottements du câble sur les gorges des tambours et de limiter corrélativement l'usure des câbles. Il permet de ce fait d'envisager l'utilisation de câbles de tous types, même onéreux, leur durée de vie étant prolongée.Without recalling them all, it will be emphasized that it makes it possible to minimize the friction of the cable on the grooves of the drums and to limit correlatively the wear of the cables. It allows to consider the use of cables of all types, even expensive, their service life is extended.

Les pièces spécifiques à l'invention, essentiellement les anneaux périphériques, sont simples à produire et à usiner, et ne nécessitent pas d'avoir recours à des matériaux particulièrement onéreux. Ils sont en outre facilement interchangeables, ce qui permet de changer le câble utilisé, sans modifications majeures du treuil.The parts specific to the invention, essentially the peripheral rings, are simple to produce and to machine, and do not require the use of particularly expensive materials. They are also easily interchangeable, which allows to change the cable used, without major modifications of the winch.

Il doit être clair cependant que l'invention n'est pas limitée aux seuls exemples de réalisations explicitement décrits, notamment en relation avec les figures 1 à 4.It must be clear, however, that the invention is not limited to the only examples of embodiments explicitly described, particularly in relation to the Figures 1 to 4 .

Enfin, les exemples numériques n'ont été fournis que pour mieux fixer les idées et ne sauraient constituer une quelconque limitation de la portée de l'invention. Ils procèdent d'un choix technologique à la portée de l'Homme de Métier.Finally, the numerical examples were provided only to better fix the ideas and could not constitute any limitation of the scope of the invention. They proceed from a technological choice within the reach of the Man of Profession.

L'invention n'est pas non plus limitée, comme il a été indiqué, à la seule recherche pétrolière ou, de façon plus générale, aux applications dites "off-shore" en grande profondeur, même si elle trouve une application particulièrement intéressante dans ces domaines.The invention is also not limited, as has been indicated, to petroleum research alone or, more generally, to so-called "off-shore" applications at great depth, even if it finds a particularly interesting application in these areas.

Claims (9)

  1. Winch of the type referred to as a capstan winch, comprising at least two drums which are arranged so as to face each other and which drive a load by means of a cable which is wound on the drums with a predetermined number of windings and each of the drums (2, 3) comprises a peripheral wall (22, 32) and is provided with a predetermined number of peripheral rings (40-45, 50-55), characterised in that, all the rings being of resilient material and independent of each other and wound around the peripheral wall (22, 32), the peripheral rings (40-45, 50-55) are each provided with a peripheral groove (440, 450) which is intended to receive the cable (C) and in that the resilient material which constitutes the peripheral rings (40-45, 50-55) is provided with physiochemical characteristics such that it allows, at the same time, driving of the cable (C) and relative sliding between a lower wall (441, 451) of the peripheral rings (40-45, 50-55) in contact with the peripheral wall (22, 32) of the drums (2, 3) and this wall (441, 451), the relative sliding being of an amplitude substantially equal to longitudinal deformations to which the cable (C) is subjected, when it is subjected to tensions of variable amplitudes.
  2. Winch according to claim 1, characterised in that each of the drums (2, 3) is provided with a pair of lateral rings (21a-21b, 31a-31b), in that at least one of the lateral rings (21a-21b, 31a-31b) of each pair is removable, so as to allow the positioning of the peripheral rings (40-45, 50-55) around the peripheral wall (22, 32) of the drums (2, 3), or the removal thereof.
  3. Winch according to either claim 1 or claim 2, characterised in that the peripheral rings (40-45, 50-55) are produced from a synthetic material.
  4. Winch according to any one of the preceding claims, characterised in that the peripheral walls (22, 32) of the drums (2, 3) are produced from stainless steel or from steel which is covered with ceramic material.
  5. Winch according to any one of claims 1 to 4, characterised in that the distance (p) between the grooves (440, 450) of two adjacent rings (44, 45) of the same drum (2, 3) defines a pitch having the value p, in that each of the drums (2, 3) rotates about a rotation axis (Δ1, Δ2) and in that the drums (2, 3) are axially offset relative to each other by a fraction (p/2) of the pitch (d).
  6. Winch according to claim 5, characterised in that the fraction is equal to a half-pitch (p/2).
  7. Winch according to any one of claims 1 to 4, characterised in that each of the drums (2, 3) rotates about a rotation axis (Δ'1, Δ'2) and in that the rotation axes Δ'1, Δ'2) together form an angle (α) which is not equal to zero.
  8. Winch according to claim 7, characterised in that the angle (α) is between 0.5° and 3°.
  9. Use of a winch (C) according to any one of the preceding claims for petroleum prospecting in deep waters.
EP03775495A 2002-08-28 2003-08-26 Capstan winch Expired - Lifetime EP1546017B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0210649A FR2843953B1 (en) 2002-08-28 2002-08-28 WINCH TYPE A CABESTAN
FR0210649 2002-08-28
PCT/FR2003/050040 WO2004020323A1 (en) 2002-08-28 2003-08-26 Capstan winch

Publications (2)

Publication Number Publication Date
EP1546017A1 EP1546017A1 (en) 2005-06-29
EP1546017B1 true EP1546017B1 (en) 2010-09-15

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EP03775495A Expired - Lifetime EP1546017B1 (en) 2002-08-28 2003-08-26 Capstan winch

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US (1) US7175163B2 (en)
EP (1) EP1546017B1 (en)
AT (1) ATE481351T1 (en)
AU (1) AU2003283521A1 (en)
CA (1) CA2496944C (en)
DE (1) DE60334228D1 (en)
FR (1) FR2843953B1 (en)
WO (1) WO2004020323A1 (en)

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EP2195272B1 (en) * 2007-08-24 2012-12-12 Itrec B.V. Traction winch
US8474795B2 (en) 2008-09-16 2013-07-02 Tt Technologies, Inc. Pulling device and method therefor
US8613426B1 (en) * 2009-12-14 2013-12-24 L.E. Myers Co. Power line puller control package
US8342484B2 (en) * 2010-02-16 2013-01-01 Robert Matos Anchor windlass for boats
GB201005200D0 (en) * 2010-03-27 2010-05-12 Parkburn Prec Handling Systems Winch apparatus
DE102010026968B4 (en) * 2010-07-13 2014-02-13 Liebherr-Components Biberach Gmbh Winch and construction machine or lifter
US20120186506A1 (en) * 2011-01-25 2012-07-26 Ottar Antonsen System for handling conventional and synthetic moorings lines, cables and the like aboard a vessel
EP2765112A1 (en) 2013-02-07 2014-08-13 Aker Pusnes AS Traction winch
GB201306974D0 (en) * 2013-04-17 2013-05-29 Parkburn Prec Handling Systems Ltd Load Bearing Apparatus and Method
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FI127270B (en) 2015-05-20 2018-02-28 Konecranes Global Oy Rope drum and method for retracting or releasing a rope under tension
US9950915B2 (en) 2015-05-27 2018-04-24 Rt Ltd. Winch system
US11279601B2 (en) 2017-04-03 2022-03-22 National Oilwell Varco, L.P. Hoisting and tensioning bearing saver
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Also Published As

Publication number Publication date
US7175163B2 (en) 2007-02-13
WO2004020323A1 (en) 2004-03-11
ATE481351T1 (en) 2010-10-15
FR2843953A1 (en) 2004-03-05
AU2003283521A1 (en) 2004-03-19
FR2843953B1 (en) 2005-04-08
US20060022182A1 (en) 2006-02-02
DE60334228D1 (en) 2010-10-28
CA2496944A1 (en) 2004-03-11
CA2496944C (en) 2012-08-14
EP1546017A1 (en) 2005-06-29

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