WO2024100462A1 - Pulley for anchoring a floating platform - Google Patents

Pulley for anchoring a floating platform Download PDF

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Publication number
WO2024100462A1
WO2024100462A1 PCT/IB2023/058130 IB2023058130W WO2024100462A1 WO 2024100462 A1 WO2024100462 A1 WO 2024100462A1 IB 2023058130 W IB2023058130 W IB 2023058130W WO 2024100462 A1 WO2024100462 A1 WO 2024100462A1
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WO
WIPO (PCT)
Prior art keywords
pulley
sheave
block
floating platform
wheels
Prior art date
Application number
PCT/IB2023/058130
Other languages
Spanish (es)
French (fr)
Inventor
Antonio GARCÍA FERRÁNDEZ
Original Assignee
Gazelle Wind Power Limited
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 Gazelle Wind Power Limited filed Critical Gazelle Wind Power Limited
Publication of WO2024100462A1 publication Critical patent/WO2024100462A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/04—Fastening or guiding equipment for chains, ropes, hawsers, or the like
    • B63B21/10—Fairleads

Definitions

  • the object of the present invention is a pulley for anchoring a floating platform, which is especially suitable for anchoring floating platforms that serve as the base of wind turbines located at sea.
  • the pulley object of the present invention allows the use of large sheaves (pulley rings) keeping away from the water surface all those rotating elements susceptible to greater deterioration due to corrosion, such as bearings or axles.
  • floating platforms can reduce their height above the surface level, without this implying that the rotating elements susceptible to greater deterioration have to remain below the surface of the sea.
  • the pulley of the invention makes it possible to reduce weight compared to other conventional pulleys and facilitate the manufacture and installation of the pulley on a floating platform.
  • the pulley object of the present invention has application in any type of structure intended to be placed floating on the surface of the sea, and that needs to have anchor points on the seabed, to hold the anchoring cables or chains of the floating platforms.
  • Floating platforms especially those dedicated to supporting wind turbines for the generation of electrical energy from wind energy at sea, need anchoring systems that keep them in their position and contribute to their stability.
  • Anchor lines (mooring chains or cables) comprise a section of bottom attached to a bottom weight that rests on the seabed.
  • the mooring lines may also comprise a central section attached to a counterweight hanging from the floating platform in correspondence with a central axis (or central or radial axis of symmetry) of the floating platform.
  • the anchor lines run through one or more pulleys between the bottom section and the central section. These pulleys are attached to the floating platform at certain points of the floating platform, for example, at the ends of projecting structural arms (in the case of floating platforms with star-shaped geometry, comprising a plurality of projecting structural arms).
  • a drawback of using pulleys in anchoring systems is the fatigue that the anchor cables experience when running along the pulley. Over time, the mooring cables are subjected to continuous bending efforts as they pass through the pulleys, which generates fatigue that can end up breaking the mooring cables. Likewise, the saline environment of the sea can also accelerate the deterioration of anchor cables.
  • a conventional pulley is made up of a sheave or perimeter ring (rim) on which the cable rests, which passes through the throat of that ring.
  • the rim is supported by a series of spokes that join together in a central hub or hub, on which the pulley can rotate (being dragged by the longitudinal movement of the cable).
  • the axis of rotation of the hub or hub is hung from the floating platform by an auxiliary structure (block, chassis or frame) that surrounds and embraces the pulley and that can rotate laterally around a Tilting shaft attached to the floating platform with a support structure.
  • the tension of the mooring cable is transmitted to the pulley as a pressure on the groove of the pulley and from there it passes through one of the spokes to the central hub bushing.
  • most of the spokes are not subjected to loads and must simply be there, to start acting when the sheave rotates and they come into contact with the cable. In other words, in general only a third of the spokes would be necessary.
  • sheaves could imply that the sheave was partially submerged (at least at its lower end) under sea water. This can also cause the pulley bushing, shaft and bearings to become submerged, for example, when there are waves, accelerating their deterioration and corrosion.
  • the present invention refers to a pulley for anchoring a floating platform.
  • the block comprises a set of interior impellers distributed along a segment of circumference and configured to be arranged in contact with the sheave on the inside of the ring defined by the sheave.
  • the pulley comprises a tilting axis configured to be inserted in first bearings of the block. This configuration allows the pulley to tilt (change the inclination of the plane of the sheave) when the tensions of the mooring cables reorient the pulley (due to the movement of the floating platform by the waves).
  • the pulley is configured to be connected to the floating platform by a connecting piece.
  • the connection piece is configured to be connected to the tilt shaft of the pulley by means of second bearings.
  • the sheave is supported only by the inner wheels.
  • the tilting axis can be located inside the ring defined by the sheave.
  • the first bearings are configured to be arranged inside the ring defined by the sheave, so that the tilting axis is also configured to be arranged inside the ring defined by the sheave.
  • the inner wheels comprise lateral guides with a flat disc geometry and configured to be located on both sides of a radial inner rib of the pulley. This feature prevents the pulley from derailing and coming off the inner wheels.
  • the radial inner rib of the sheave may comprise an inner rail and the side guides may surround the radial inner rib of the sheave with its inner rail.
  • the inner wheels may lack said lateral guides and the inner radial rib of the roller may comprise said inner rail, so that the inner wheels are configured to run inside the inner rail of the inner radial rib of the roller.
  • the inner wheels may comprise outer rolling areas at both ends of each inner wheel, These outer rolling areas serve as radial support for the sides of the inner radial rib of the sheave.
  • the pulley comprises at least one outer impeller configured to be arranged in contact with the sheave on the outside of the ring defined by the sheave.
  • This at least one outer impeller is connected to the side plates of the block by means of side plates.
  • this at least one outer wheel helps prevent the anchor cable from coming out of the inside of the pulley groove.
  • the pulley comprises at least two external wheels.
  • the first bearings are configured to be arranged on the outside of the ring defined by the sheave, so that the tilting axis is also configured to be arranged on the outside of the ring defined by the sheave.
  • the inner wheels can be connected to the side plates of the block by means of plate extensions.
  • the inner wheels comprise lateral guides with a flat disc geometry and configured to be located on both sides of an internal rib. radial of the sheave. This feature prevents the pulley from derailing and coming off the inner wheels.
  • the radial inner rib of the sheave may comprise an inner rail and the side guides may surround the radial inner rib of the sheave with its inner rail.
  • the inner wheels may lack said lateral guides and the inner radial rib of the roller may comprise said inner rail, so that the inner wheels are configured to run inside the inner rail of the inner radial rib of the sheave.
  • the inner wheels may comprise outer rolling zones at both ends of each inner wheel, these outer rolling zones serving as radial support for the sides of the inner radial rib of the sheave.
  • the pulley comprises at least one outer impeller configured to be arranged in contact with the sheave on the outside of the ring defined by the sheave.
  • the at least one outer impeller is arranged inside the block (inside the volume defined by the side plates of the block).
  • the pulley comprises at least two outer wheels.
  • the sheave of the pulley may comprise a simple groove, configured to accommodate a single anchor cable.
  • the sheave of the pulley may comprise a multiple groove (double, triple, etc.), configured to accommodate two or more anchor cables.
  • Figure 1 a shows a schematic view of a conventional pulley with an anchor cable that runs through the throat of the sheave, through a sector of the perimeter of the sheave, where the sheave comprises a plurality of spokes that connect the outer ring with a central hub or hub.
  • Figure 1 b shows a perspective view of the sheave of the pulley in Figure 1a, where a breakage of the sheave that separates the sector of the perimeter of the sheave through which the anchoring cable runs has been represented.
  • Figure 2a shows a perspective view of the pulley block, according to a first embodiment of the invention.
  • Figure 2b shows a schematic view of the assembly of the block inside the sheave, according to the first embodiment of the invention.
  • Figure 2c shows a schematic view of the sheave and the block in their mounting position, according to the first embodiment of the invention.
  • Figure 2d shows a view analogous to that of Figure 2b, where the outer impellers connected to the block plates have been mounted by means of the corresponding side plates.
  • Figure 3a shows a possible inner impeller configuration with lateral guides surrounding a radial inner rib of the sheave.
  • Figure 3b shows a possible configuration of an inner wheel without lateral guides, where the inner wheel runs inside a rail formed in the inner radial rib of the sheave.
  • Figure 3c shows a possible configuration similar to that of Figure 3b, but where the inner wheel comprises outer rolling areas at both ends of the wheel, which serve as radial support for the sides of the inner radial rib of the sheave; This Figure shows the throat of the sheave adapted to house two anchor cables.
  • Figure 3d shows a possible configuration, similar to that of Figure 3a, but where the radial interior rib of the roller comprises an interior rail; This Figure shows the throat of the sheave adapted to house two anchor cables.
  • Figure 4 shows a detailed perspective view of the block and the sheave in their mounting position, according to the first embodiment of the invention.
  • Figure 5 shows a comparative schematic view of the relative movement of the sheave with respect to a protruding structural arm of a floating platform, depending on whether the tilt axis is located on the outside of the sheave (left of the Figure) or inside the sheave (right of the Figure).
  • Figure 6 shows a perspective view of the block with the tilting axis inserted in the first bearings, according to the first embodiment of the invention.
  • Figure 7 shows a detailed perspective view, analogous to that of Figure 3, where the connection piece of the pulley to the floating platform is represented.
  • Figure 8 shows a perspective view of a floating platform, where a set of pulleys has been installed, according to the first embodiment of the invention.
  • Figure 9 shows a schematic view of the sheave and the block in their mounting position, according to the second embodiment of the invention.
  • Figure 10 shows a detailed perspective view of the block and the sheave in their mounting position, according to the second embodiment of the invention.
  • Figure 11 shows a perspective view of the relative position of the connecting piece, the tilting axis and the pulley sheave, according to the second embodiment of the invention.
  • Figure 12 shows a perspective view of the block and the sheave in their mounting position, according to the second embodiment of the invention, where the connection piece of the pulley to the floating platform is represented.
  • Figure 13 shows a perspective view of a floating platform, where a set of pulleys has been installed, according to the second embodiment of the invention.
  • the present invention refers, as mentioned above, to a pulley (100) for anchoring a floating platform (400).
  • Figure 1 a shows a conventional pulley (100'), with its sheave (300') and its block (200'), where the sheave (300') comprises a plurality of spokes (300b) that join the perimeter of the sheave (300') with a central bushing (300a).
  • the anchor cable (700) runs along a sector of the perimeter of the sheave (300'). Therefore, the tension that the anchor cable (700) communicates to the sheave (300') is transmitted to the bushing (300a) of the sheave (300') only through the spokes (300b) located in correspondence with the sector of the perimeter of the sheave (300') through which the anchoring cable (700) runs.
  • Figure 1b shows the sheave (300') of the pulley (100') of Figure 1 a, with a break that separates the sector of the sheave (300') corresponding to the area through which the cable runs.
  • the pulley (100) is configured to be installed on a floating platform (400), for example, at the ends of protruding structural arms of the floating platform (400), as shown. in Figure 8.
  • Each pulley (100) comprises a block (200) or chassis, and at least one pulley (300) or ring.
  • Figure 2a shows a perspective view of the block (200) of the pulley (100), according to a first embodiment of the pulley (100) object of the present invention.
  • the block (200) has a circular crown segment geometry, covering approximately 120 e of circular crown arc.
  • the block (200) comprises a plurality of interior impellers (201) distributed along the outer perimeter of the circular crown segment of the block (200).
  • the inner impellers (201) comprise a cylindrical body (201 a), a first axis (201b) and, optionally, lateral guides (201c).
  • the first axis (201 b) has a sufficient length to pass through the cylindrical body (201a) and, where appropriate, the lateral guides (201c) of the inner impeller (201), as well as the plates (202) of the block (200 ).
  • the block (200) is configured to be placed and located inside the perimeter of the sheave (300), as shown in Figure 2a, Figure 2b and Figure 2c.
  • the inner wheels (201), and the union of its first axis (201b) with the plates (202) of the block (200), are configured to support the weight of the sheave (300), as well as the tension that the cable anchoring force (700) exerts on the pulley (100).
  • the lateral guides (201c) of the inner impellers (201) have flat disc geometry and are configured to be located on both sides of a radial inner rib (301a) of the roller (300), configuring a kind of rail for said inner radial nerve (301a) of the roller (300).
  • Figure 3a shows an example of an inner impeller (201) with these lateral guides (201c) located on both sides of the inner rib (301 a) of the roller (300).
  • the inner wheels (201) may lack said lateral guides (201c), and may be configured to roll inside a rail (301 b) located in correspondence with the inner rib ( 301 a) radial of the sheave (300).
  • the inner wheels (201) can also comprise an outer rolling area (201 d), configured to serve as radial support for the sides of the inner radial rib (301 a). .
  • the inner wheels (201) comprise lateral guides (201c) configured to be arranged on both sides of a radial inner rib (301 a) of the roller (300), where said inner rib (301 a) radial in turn has an interior rail (301 b).
  • Figure 3d shows an example of this combination of inner impeller (201) with lateral guides (201a) and roller (300) with inner radial rib (301a) that has an inner rail (301b).
  • the sheave (300) may comprise a throat (301) adapted for the passage of a single anchor cable (700) (simple throat (301), as shown in Figure 3a and in Figure 3b) or a throat (301) adapted for the passage of two anchor cables (700) (double throat (301), as shown in Figure 3c and Figure 3d), or a throat (301) adapted for the passage of three or more anchor cables (700) (not shown in the Figures).
  • the pulley (100) also comprises at least one outer wheel (203) and, preferably, at least two outer wheels (203).
  • These outer impellers (203) also comprise a cylindrical central body (203a) and, on each side of the cylindrical central body (203a), two conical cylinder ends (203b), with their cylindrical part configured to rest on flanges (302) of the sheave (300).
  • the outer wheels (203) comprise a second shaft (203c) with a length sufficient to pass through the cylindrical central body (203a), the conical cylinder ends (203b) and some side plates (203d) configured to connect the outer wheels (203). with the plates (202) of the block (200) (for example, in correspondence with the first axes (201b) of some of the inner impellers (201).
  • the floating platform (400) can rise and the upward movement of the floating platform can provide the rollers (300) of the pulleys (100) with sufficient inertia so that, when the floating platform (400) stop ascending and the anchor cables (700) become slack, the sheaves (300) could detach from the inner wheels (201) and be dismantled from the pulley (100). In these situations, the outer impellers (203) prevent the sheave (300) from being removed from the block (200) of the pulley (100).
  • the pulley (100) comprises a tilting axis (500) formed by a single continuous section or by two or more aligned sections.
  • Figure 4 shows the pulley (100), according to its first embodiment, and an example is shown where the tilting axis (500) is formed by two separate and aligned sections.
  • the tilting axis (500) is located inside the sheave (300).
  • the block (200) comprises first bearings (204) connected to the plates (202) and directed towards the interior of the geometry in the form of a circular crown segment of the block (200).
  • the tilting axis (500) is configured to be inserted in these first bearings (204), so that the pulley (100) can tilt around said tilting axis (500).
  • tilting axis (500) is located inside the sheave (300) is advantageous to prevent, due to the movements of the floating platform (400), the tension of the anchor cables (700) from being reorient the pulleys (100) causing the sheaves (300) to collide with the floating platform (400).
  • Figure 5 illustrates, by way of comparison, the behavior of two pulleys (100), where the pulley (100) on the left includes its tilting axis (500) located on the outside (and, obviously, on the outside). above) of the sheave (300), and the pulley (100) on the right has its tilt axis (500) located inside the sheave (300).
  • the two pulleys (100) are located at the same height.
  • the rest situation is represented where the sheaves (300) hang vertically from the tilting axis (500) and the plane of the sheave (300) is located parallel to the plane of an arm.
  • the pulley (300) of the pulley (100) on the right (the one with its tilt axis inside the pulley (300)) is furthest from the floating platform (400) than the roller (300) of the pulley (100) on the left (which has its tilt axis (500) on the outside of the sheave (300)).
  • FIG 6 a perspective view of the block (200) of the pulley (100) can be seen, according to its first embodiment, where the tilting axis (500) can be seen mounted or inserted in the first bearings (204). ), and where the outer impellers (203) connected by means of the side plates (203d) to the plates (202) of the block (200) can also be seen in detail.
  • connection piece (600) configured to join the block (200) of the pulley (100) to the floating platform (400).
  • the connection piece (600) comprises second bearings (601) configured to be positioned in correspondence with the first bearings (204) of the block (200), and so that the tilt axis (500) is inserted both in the first bearings (204) and in the second bearings (601).
  • Figure 8 shows a floating platform (400) with a set of pulleys (100), according to the first embodiment of the invention, joined to said floating platform (400) by means of their corresponding connection pieces (600).
  • the block (200) of the pulley (100) with its two plates (202) is configured to be arranged on the outside of the sheave (300).
  • Figure 9 shows an example of this second embodiment of the pulley (100), where the block (200) and the upper part of the sheave (300) can be seen.
  • the outer wheels (203) are arranged between the plates (202) of the block (200), while the wheels
  • the interior parts (201) are connected to the sheets (202) of the block (200) by means of sheet extensions (202a).
  • the tilting axis (500) is located on the outside of the pulley (300).
  • the tilting axis (500) is configured to be inserted in the first bearings (204), which in this second embodiment are located within the volume defined by the plates (202) of the block (200).
  • Figure 10 shows a perspective view of the second embodiment of the pulley (100).
  • Figure 11 shows a possible design of the connection piece (600) configured to connect the pulley (100) with the floating platform (400), according to this second embodiment of the pulley (100).
  • the tilt axis (500) is configured to be inserted in the second bearings (601) of the connection piece
  • the second bearings (601) are configured to be inserted in slots (205) of the plates (202) of the block (200) (see Figure 8).
  • connection piece (600) shows the connection piece (600) connected to the block (200) of the pulley (100), according to the second embodiment of the pulley (100).
  • Figure 13 shows a floating platform (400) with a set of pulleys (100), according to the second embodiment of the invention, joined to said floating platform (400) by means of their corresponding connection pieces (600). ).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Pulleys (AREA)

Abstract

Pulley (100) for anchoring a floating platform (400), wherein the pulley (100) comprises a sheave (300) and a snatch block (200), wherein the snatch block (200) comprises a set of inner sheaves (201) distributed along a circumference segment and configured to be arranged in contact with the sheave (300) inside the ring defined by the sheave (300); wherein the pulley (100) comprises a tilting axis (500) configured to be inserted in first bearings (204) of the snatch block (200), where the pulley (100) is configured to be connected to the floating platform (400) by means of a connecting piece (600), wherein the connecting piece (600) is configured to be connected to the tilting axis (500) of the pulley (100) by means of second bearings (601) so that, in the installation position of the pulley (100) on the floating platform (400), the sheave (300) is supported only by the inner sheaves (201).

Description

Polea para el fondeo de una plataforma flotante Pulley for anchoring a floating platform
DESCRIPCIÓN DESCRIPTION
Objeto de la invención Object of the invention
La presente invención tiene por objeto una polea para el fondeo de una plataforma flotante, que está especialmente indicada para el fondeo de plataformas flotantes que sirven de base de aerogeneradores situados en el mar. The object of the present invention is a pulley for anchoring a floating platform, which is especially suitable for anchoring floating platforms that serve as the base of wind turbines located at sea.
La polea objeto de la presente invención permite emplear roldanas (anillos de polea) de gran tamaño manteniendo alejados de la superficie del agua todos aquellos elementos rotativos susceptibles de un mayor deterioro por corrosión, como pueden ser los rodamientos o ejes. Asimismo, gracias a la polea objeto de la presente invención, las plataformas flotantes pueden reducir su altura sobre el nivel de la superficie, sin que ello implique que los elementos rotativos susceptibles de mayor deterioro tengan que quedar bajo la superficie del mar. Por último, la polea de la invención permite reducir el peso con respecto a otras poleas convencionales y facilitar la fabricación e instalación de la polea en una plataforma flotante. The pulley object of the present invention allows the use of large sheaves (pulley rings) keeping away from the water surface all those rotating elements susceptible to greater deterioration due to corrosion, such as bearings or axles. Likewise, thanks to the pulley object of the present invention, floating platforms can reduce their height above the surface level, without this implying that the rotating elements susceptible to greater deterioration have to remain below the surface of the sea. Finally, the pulley of the invention makes it possible to reduce weight compared to other conventional pulleys and facilitate the manufacture and installation of the pulley on a floating platform.
La polea objeto de la presente invención tiene aplicación en cualquier tipo de estructura destinada a situarse flotando sobre la superficie del mar, y que necesite disponer de puntos de anclaje en el fondo marino, para sujetar los cables o cadenas de fondeo de las plataformas flotantes. Antecedentes de la invención y problema técnico a resolver The pulley object of the present invention has application in any type of structure intended to be placed floating on the surface of the sea, and that needs to have anchor points on the seabed, to hold the anchoring cables or chains of the floating platforms. Background of the invention and technical problem to be solved
Las plataformas flotantes, especialmente las dedicadas a soportar aerogeneradores para la generación de energía eléctrica a partir de energía eólica en el mar, necesitan sistemas de fondeo que las mantengan en su posición y contribuyan a la estabilidad de las mismas. Floating platforms, especially those dedicated to supporting wind turbines for the generation of electrical energy from wind energy at sea, need anchoring systems that keep them in their position and contribute to their stability.
Algunos sistemas de fondeo conocidos, como por ejemplo el divulgado en el documento ES 2629867 A2, emplean sistemas de poleas que cuelgan de determinados puntos de la plataforma flotante. Las líneas de fondeo (cadenas o cables de fondeo) comprenden un tramo de fondo unido a un peso de fondo que descansa sobre el lecho marino. Las líneas de fondeo pueden comprender también un tramo central unido a un contrapeso que cuelga de la plataforma flotante en correspondencia con un eje central (o eje de simetría central o radial) de la plataforma flotante. Las líneas de fondeo discurren por una o más poleas entre el tramo de fondo y el tramo central. Estas poleas están unidas a la plataforma flotante en determinados puntos de la plataforma flotante, por ejemplo, en los extremos de brazos estructurales salientes (en el caso de plataformas flotantes con geometría en forma de estrella, que comprenden una pluralidad de brazos estructurales salientes). Some known anchoring systems, such as the one disclosed in document ES 2629867 A2, use pulley systems that hang from certain points of the floating platform. Anchor lines (mooring chains or cables) comprise a section of bottom attached to a bottom weight that rests on the seabed. The mooring lines may also comprise a central section attached to a counterweight hanging from the floating platform in correspondence with a central axis (or central or radial axis of symmetry) of the floating platform. The anchor lines run through one or more pulleys between the bottom section and the central section. These pulleys are attached to the floating platform at certain points of the floating platform, for example, at the ends of projecting structural arms (in the case of floating platforms with star-shaped geometry, comprising a plurality of projecting structural arms).
Un inconveniente del uso de poleas en los sistemas de fondeo es la fatiga que experimentan los cables de fondeo al discurrir a lo largo de la polea. Con el paso del tiempo, los cables de fondeo se ven sometidos a continuos esfuerzos de flexión a su paso por las poleas, lo cual genera fatiga que puede acabar por romper los cables de fondeo. Asimismo, el ambiente salino del mar también puede producir una aceleración en el deterioro de los cables de fondeo. A drawback of using pulleys in anchoring systems is the fatigue that the anchor cables experience when running along the pulley. Over time, the mooring cables are subjected to continuous bending efforts as they pass through the pulleys, which generates fatigue that can end up breaking the mooring cables. Likewise, the saline environment of the sea can also accelerate the deterioration of anchor cables.
Para tratar de solucionar el problema de la fatiga en los cables de fondeo, se puede plantear un aumento del tamaño de las roldanas de las poleas. El aumento del radio de las roldanas implicaría someter a los cables de fondeo a un menor esfuerzo de flexión a su paso por las poleas y, por consiguiente, a una menor fatiga. To try to solve the problem of fatigue in the anchor cables, an increase in the size of the pulley sheaves can be considered. Increasing the radius of the sheaves would mean subjecting the anchor cables to less bending stress as they pass through the pulleys and, consequently, to less fatigue.
Sin embargo, el aumento del tamaño de las roldanas de las poleas trae consigo un aumento del peso y de la complejidad de fabricación. No sólo aumentaría el peso de la roldana, sino también el peso de la pasteca o estructura metálica que conecta la roldana con el punto de unión a la plataforma flotante. However, the increase in the size of the pulley wheels brings with it an increase in weight and manufacturing complexity. Not only would the weight of the sheave increase, but also the weight of the block or metal structure that connects the sheave with the connection point to the floating platform.
Una polea convencional, está formada por una roldana o anillo perimetral (llanta) sobre el que apoya el cable, que pasa por la garganta de ese anillo. La llanta está soportada por una serie de radios que se unen entre sí en un buje o cubo central, sobre el que puede girar la polea (al ser arrastrada por el movimiento longitudinal del cable). En los sistemas de poleas convencionales aplicados a plataformas flotantes, el eje de giro del buje o cubo se cuelga de la plataforma flotante mediante una estructura auxiliar (pasteca, chasis o armadura) que rodea y abraza la polea y que puede girar lateralmente alrededor de un eje de basculación unido a la plataforma flotante con una estructura de soporte. A conventional pulley is made up of a sheave or perimeter ring (rim) on which the cable rests, which passes through the throat of that ring. The rim is supported by a series of spokes that join together in a central hub or hub, on which the pulley can rotate (being dragged by the longitudinal movement of the cable). In conventional pulley systems applied to floating platforms, the axis of rotation of the hub or hub is hung from the floating platform by an auxiliary structure (block, chassis or frame) that surrounds and embraces the pulley and that can rotate laterally around a Tilting shaft attached to the floating platform with a support structure.
La tensión del cable de fondeo se transmite a la polea como una presión sobre la garganta de la polea y desde ahí pasa a través de alguno de los radios al buje cubo central. De hecho, la mayor parte de los radios no están sometidos a cargas y simplemente deben estar ahí, para empezar a actuar cuando gire la roldana y pasen a estar en la zona de contacto con el cable. Dicho de otra forma, en general sólo un tercio de los radios serían necesarios. The tension of the mooring cable is transmitted to the pulley as a pressure on the groove of the pulley and from there it passes through one of the spokes to the central hub bushing. In fact, most of the spokes are not subjected to loads and must simply be there, to start acting when the sheave rotates and they come into contact with the cable. In other words, in general only a third of the spokes would be necessary.
En una polea pequeña, esto carece de importancia, pero en una polea de gran tamaño, en la que su peso sea un criterio de diseño relevante, la posibilidad de suprimir esos radios sería una ventaja importante. In a small pulley, this is unimportant, but in a large pulley, in which its weight is a relevant design criterion, the possibility of eliminating these spokes would be an important advantage.
Asimismo, el aumento del tamaño de las roldanas podría implicar que la roldana quedase parcialmente sumergida (al menos en su extremo inferior) bajo el agua del mar. Esto también puede provocar que el buje, eje y rodamientos de la polea queden sumergidos, por ejemplo, cuando hay oleaje, acelerando su deterioro y corrosión. Likewise, increasing the size of the sheaves could imply that the sheave was partially submerged (at least at its lower end) under sea water. This can also cause the pulley bushing, shaft and bearings to become submerged, for example, when there are waves, accelerating their deterioration and corrosion.
Para evitar el problema anterior, cabría plantearse aumentar la altura o puntal de los brazos estructurales salientes de la plataforma flotante, para que los extremos de estos brazos estructurales salientes (de los que cuelga la pasteca y la roldana) queden más elevados sobre la superficie del mar. Sin embargo, esta solución encarecería y haría más compleja la estructura de la plataforma flotante, aumentando su peso Descripción de la invención To avoid the previous problem, one might consider increasing the height or strut of the protruding structural arms of the floating platform, so that the ends of these protruding structural arms (from which the block and sheave hang) are higher above the surface of the platform. sea. However, this solution would make the structure of the floating platform more expensive and complex, increasing its weight. Description of the invention
Con objeto de solucionar los inconvenientes anteriormente mencionados, la presente invención se refiere a una polea para el fondeo de una plataforma flotante. In order to solve the aforementioned drawbacks, the present invention refers to a pulley for anchoring a floating platform.
La polea para el fondeo de una plataforma flotante objeto de la presente invención comprende una roldana (o anillo de la polea) y una pasteca (o chasis de la polea). The pulley for anchoring a floating platform that is the object of the present invention comprises a sheave (or pulley ring) and a block (or pulley chassis).
De manera novedosa, en la polea objeto de la presente invención, la pasteca comprende un conjunto de rodetes interiores distribuidos a lo largo de un segmento de circunferencia y configurados para quedar dispuestos en contacto con la roldana por el interior del anillo definido por la roldana. In a novel way, in the pulley object of the present invention, the block comprises a set of interior impellers distributed along a segment of circumference and configured to be arranged in contact with the sheave on the inside of the ring defined by the sheave.
La polea comprende un eje de basculación configurado para quedar inserto en unos primeros cojinetes de la pasteca. Esta configuración permite a la polea bascular (cambiar la inclinación del plano de la roldana) cuando las tensiones de los cables de fondeo reorientan la polea (debido al movimiento de la plataforma flotante por el oleaje). The pulley comprises a tilting axis configured to be inserted in first bearings of the block. This configuration allows the pulley to tilt (change the inclination of the plane of the sheave) when the tensions of the mooring cables reorient the pulley (due to the movement of the floating platform by the waves).
La polea está configurada para quedar conectada a la plataforma flotante mediante una pieza de conexión. La pieza de conexión está configurada para quedar conectada al eje de basculación de la polea mediante unos segundos cojinetes. The pulley is configured to be connected to the floating platform by a connecting piece. The connection piece is configured to be connected to the tilt shaft of the pulley by means of second bearings.
Así pues, en la posición de instalación de la polea en la plataforma flotante, la roldana está soportada únicamente por los rodetes interiores. Thus, in the installation position of the pulley on the floating platform, the sheave is supported only by the inner wheels.
Mediante la polea descrita anteriormente, se puede disponer de una roldana sin radios ni buje central, ya que la roldana queda soportada solamente por los rodetes interiores, que permiten el giro de la roldana. Esto permite aligerar el peso de la roldana, e incluso permite aumentar el diámetro de la roldana, lo cual redunda en una disminución de la fatiga a flexión de los cables de fondeo. Using the pulley described above, you can have a sheave without spokes or central hub, since the sheave is supported only by the inner wheels, which allow the sheave to rotate. This allows the weight of the sheave to be lightened, and even allows increase the diameter of the sheave, which results in a decrease in bending fatigue of the anchor cables.
Esta configuración sin radios de la roldana posibilita que, según se verá más adelante, en una de las formas de realización de la polea, el eje de basculación pueda situarse por el interior del anillo definido por la roldana. This configuration without spokes of the sheave makes it possible that, as will be seen later, in one of the embodiments of the pulley, the tilting axis can be located inside the ring defined by the sheave.
Así pues, según se acaba de introducir, y según una primera forma de realización de la polea de la presente invención, los primeros cojinetes están configurados para quedar dispuestos por el interior del anillo definido por la roldana, de manera que el eje de basculación está también configurado para quedar dispuesto por el interior del anillo definido por la roldana. Thus, as just introduced, and according to a first embodiment of the pulley of the present invention, the first bearings are configured to be arranged inside the ring defined by the sheave, so that the tilting axis is also configured to be arranged inside the ring defined by the sheave.
Esta configuración permite que, ante los movimientos de basculación de la polea, sea más difícil que la roldana pueda llegar a chocar con la plataforma flotante (disminuye el riesgo de contacto de la roldana con la plataforma flotante). This configuration makes it more difficult for the sheave to collide with the floating platform in the event of tilting movements of the pulley (reducing the risk of contact between the sheave and the floating platform).
En una posible vahante de esta primera forma de realización de la polea, los rodetes interiores comprenden unas guías laterales con una geometría de disco plano y configuradas para quedar situadas a ambos lados de un nervio interior radial de la roldana. Mediante esta característica, se impide que la roldana pueda descarrilar y salirse de los rodetes interiores. In a possible version of this first embodiment of the pulley, the inner wheels comprise lateral guides with a flat disc geometry and configured to be located on both sides of a radial inner rib of the pulley. This feature prevents the pulley from derailing and coming off the inner wheels.
El nervio interior radial de la roldana puede comprender un riel interior y las guías laterales pueden rodear el nervio interior radial de la roldana con su riel interior. The radial inner rib of the sheave may comprise an inner rail and the side guides may surround the radial inner rib of the sheave with its inner rail.
Opcionalmente, los rodetes interiores pueden carecer de las mencionadas guías laterales y el nervio interior radial de la roldana puede comprender el mencionado riel interior, de manera que los rodetes interiores están configurados para discurrir por el interior del riel interior del nervio interior radial de la roldana. En este caso, los rodetes interiores pueden comprender unas zonas exteriores de rodadura a ambos extremos de cada rodete interior, sirviendo estas zonas exteriores de rodadura de apoyo radial a los laterales del nervio interior radial de la roldana. Optionally, the inner wheels may lack said lateral guides and the inner radial rib of the roller may comprise said inner rail, so that the inner wheels are configured to run inside the inner rail of the inner radial rib of the roller. . In this case, the inner wheels may comprise outer rolling areas at both ends of each inner wheel, These outer rolling areas serve as radial support for the sides of the inner radial rib of the sheave.
Asimismo, de manera preferente en esta primera forma de realización, la polea comprende al menos un rodete exterior configurado para quedar dispuesto en contacto con la roldana por el exterior del anillo definido por la roldana. Este al menos un rodete exterior está conectado con las chapas laterales de la pasteca mediante unas pletinas laterales. Esta característica permite impedir que, ante determinadas situaciones de oleaje, la roldana pueda levantarse y despegarse de los rodetes interiores y descolgarse de la plataforma flotante. Likewise, preferably in this first embodiment, the pulley comprises at least one outer impeller configured to be arranged in contact with the sheave on the outside of the ring defined by the sheave. This at least one outer impeller is connected to the side plates of the block by means of side plates. This feature makes it possible to prevent, in certain wave situations, the sheave from rising and becoming detached from the inner wheels and detaching from the floating platform.
Asimismo, este al menos un rodete exterior coadyuva en evitar que el cable de fondeo pueda salirse del interior de la garganta de la polea. Likewise, this at least one outer wheel helps prevent the anchor cable from coming out of the inside of the pulley groove.
De manera preferente, según esta primera forma de realización de la invención, la polea comprende al menos dos rodetes exteriores. Preferably, according to this first embodiment of the invention, the pulley comprises at least two external wheels.
Según una segunda forma de realización de la invención, los primeros cojinetes están configurados para quedar dispuestos por el exterior del anillo definido por la roldana, de manera que el eje de basculación está también configurado para quedar dispuesto por el exterior del anillo definido por la roldana. According to a second embodiment of the invention, the first bearings are configured to be arranged on the outside of the ring defined by the sheave, so that the tilting axis is also configured to be arranged on the outside of the ring defined by the sheave. .
En esta segunda forma de realización de la polea, los rodetes interiores pueden estar conectados con las chapas laterales de la pasteca mediante unas extensiones de chapa. In this second embodiment of the pulley, the inner wheels can be connected to the side plates of the block by means of plate extensions.
Tal y como ocurría con la primera forma de realización, en una posible variante de esta segunda forma de realización de la polea, los rodetes interiores comprenden unas guías laterales con una geometría de disco plano y configuradas para quedar situadas a ambos lados de un nervio interior radial de la roldana. Mediante esta característica, se impide que la roldana pueda descarrilar y salirse de los rodetes interiores. El nervio interior radial de la roldana puede comprender un riel interior y las guías laterales pueden rodear el nervio interior radial de la roldana con su riel interior. As occurred with the first embodiment, in a possible variant of this second embodiment of the pulley, the inner wheels comprise lateral guides with a flat disc geometry and configured to be located on both sides of an internal rib. radial of the sheave. This feature prevents the pulley from derailing and coming off the inner wheels. The radial inner rib of the sheave may comprise an inner rail and the side guides may surround the radial inner rib of the sheave with its inner rail.
Asimismo, al igual que como se ha descrito para la primera forma de realización, según esta segunda forma de realización, opcionalmente, los rodetes interiores pueden carecer de las mencionadas guías laterales y el nervio interior radial de la roldana puede comprender el mencionado riel interior, de manera que los rodetes interiores están configurados para discurrir por el interior del riel interior del nervio interior radial de la roldana. En este caso, los rodetes interiores pueden comprender unas zonas exteriores de rodadura a ambos extremos de cada rodete interior, sirviendo estas zonas exteriores de rodadura de apoyo radial a los laterales del nervio interior radial de la roldana. Likewise, as described for the first embodiment, according to this second embodiment, optionally, the inner wheels may lack said lateral guides and the inner radial rib of the roller may comprise said inner rail, so that the inner wheels are configured to run inside the inner rail of the inner radial rib of the sheave. In this case, the inner wheels may comprise outer rolling zones at both ends of each inner wheel, these outer rolling zones serving as radial support for the sides of the inner radial rib of the sheave.
También en esta segunda forma de realización, de manera preferente, la polea comprende al menos un rodete exterior configurado para quedar dispuesto en contacto con la roldana por el exterior del anillo definido por la roldana. En este caso el al menos un rodete exterior está dispuesto en el interior de la pasteca (en el interior del volumen definido por las chapas laterales de la pasteca). Also in this second embodiment, preferably, the pulley comprises at least one outer impeller configured to be arranged in contact with the sheave on the outside of the ring defined by the sheave. In this case, the at least one outer impeller is arranged inside the block (inside the volume defined by the side plates of the block).
Asimismo, también en esta segunda forma de realización, la polea comprende al menos dos rodetes exteriores. Likewise, also in this second embodiment, the pulley comprises at least two outer wheels.
La roldana de la polea puede comprender una garganta simple, configurada para albergar un único cable de fondeo. Alternativamente, la roldana de la polea puede comprender una garganta múltiple (doble, triple, etc.), configurada para albergar dos o más cables de fondeo. The sheave of the pulley may comprise a simple groove, configured to accommodate a single anchor cable. Alternatively, the sheave of the pulley may comprise a multiple groove (double, triple, etc.), configured to accommodate two or more anchor cables.
Breve descripción de las figuras Brief description of the figures
Como parte de la explicación de al menos una forma de realización de la invención se han incluido las siguientes figuras. Figura 1 a: muestra una vista esquemática de una polea convencional con un cable de fondeo que discurre por la garganta de la roldana, por un sector del perímetro de la roldana, en donde la roldana comprende una pluralidad de radios que conectan el anillo exterior con un buje o cubo central. As part of the explanation of at least one embodiment of the invention, the following figures have been included. Figure 1 a: shows a schematic view of a conventional pulley with an anchor cable that runs through the throat of the sheave, through a sector of the perimeter of the sheave, where the sheave comprises a plurality of spokes that connect the outer ring with a central hub or hub.
Figura 1 b: muestra una vista en perspectiva de la roldana de la polea de la Figura 1a, en donde se ha representado una rotura de la roldana que separa el sector del perímetro de la roldana por el cual discurre el cable de fondeo. Figure 1 b: shows a perspective view of the sheave of the pulley in Figure 1a, where a breakage of the sheave that separates the sector of the perimeter of the sheave through which the anchoring cable runs has been represented.
Figura 2a: muestra una vista en perspectiva de la pasteca de la polea, según una primera forma de realización de la invención. Figure 2a: shows a perspective view of the pulley block, according to a first embodiment of the invention.
Figura 2b: muestra una vista esquemática del montaje de la pasteca en el interior de la roldana, según la primera forma de realización de la invención. Figure 2b: shows a schematic view of the assembly of the block inside the sheave, according to the first embodiment of the invention.
Figura 2c: muestra una vista esquemática de la roldana y la pasteca en su posición de montaje, según la primera forma de realización de la invención. Figure 2c: shows a schematic view of the sheave and the block in their mounting position, according to the first embodiment of the invention.
Figura 2d: muestra una vista análoga a la de la Figura 2b, en donde se han montado los rodetes exteriores conectados a las chapas de la pasteca mediante las correspondientes pletinas laterales. Figure 2d: shows a view analogous to that of Figure 2b, where the outer impellers connected to the block plates have been mounted by means of the corresponding side plates.
Figura 3a: muestra una posible configuración de rodete interior con guías laterales que rodean un nervio interior radial de la roldana. Figure 3a: shows a possible inner impeller configuration with lateral guides surrounding a radial inner rib of the sheave.
Figura 3b: muestra una posible configuración de rodete interior sin guías laterales, donde el rodete interior discurre por el interior de un riel formado en el nervio interior radial de la roldana. Figura 3c: muestra una posible configuración similar a la de la Figura 3b, pero en donde el rodete interior comprende unas zonas exteriores de rodadura a ambos extremos del rodete, que sirven de apoyo radial a los laterales del nervio interior radial de la roldana; en esta Figura se ha representado la garganta de la roldana adaptada para albergar dos cables de fondeo. Figure 3b: shows a possible configuration of an inner wheel without lateral guides, where the inner wheel runs inside a rail formed in the inner radial rib of the sheave. Figure 3c: shows a possible configuration similar to that of Figure 3b, but where the inner wheel comprises outer rolling areas at both ends of the wheel, which serve as radial support for the sides of the inner radial rib of the sheave; This Figure shows the throat of the sheave adapted to house two anchor cables.
Figura 3d: muestra una posible configuración, similar a la de la Figura 3a, pero en donde el nervio interior radial de la roldana comprende un riel interior; en esta Figura se ha representado la garganta de la roldana adaptada para albergar dos cables de fondeo. Figure 3d: shows a possible configuration, similar to that of Figure 3a, but where the radial interior rib of the roller comprises an interior rail; This Figure shows the throat of the sheave adapted to house two anchor cables.
Figura 4: muestra una vista en perspectiva de detalle de la pasteca y la roldana en su posición de montaje, según la primera forma de realización de la invención. Figure 4: shows a detailed perspective view of the block and the sheave in their mounting position, according to the first embodiment of the invention.
Figura 5: muestra una vista esquemática comparativa del movimiento relativo de la roldana con respecto a un brazo estructural saliente de una plataforma flotante, en función de si el eje de basculación se encuentra situado por el exterior de la roldana (izquierda de la Figura) o por el interior de la roldana (derecha de la Figura). Figure 5: shows a comparative schematic view of the relative movement of the sheave with respect to a protruding structural arm of a floating platform, depending on whether the tilt axis is located on the outside of the sheave (left of the Figure) or inside the sheave (right of the Figure).
Figura 6: muestra una vista en perspectiva de la pasteca con el eje de basculación insertado en los primeros cojinetes, según la primera forma de realización de la invención. Figure 6: shows a perspective view of the block with the tilting axis inserted in the first bearings, according to the first embodiment of the invention.
Figura 7: muestra una vista en perspectiva de detalle, análoga a la de la Figura 3, en donde se representa la pieza de conexión de la polea a la plataforma flotante. Figure 7: shows a detailed perspective view, analogous to that of Figure 3, where the connection piece of the pulley to the floating platform is represented.
Figura 8: muestra una vista en perspectiva de una plataforma flotante, en donde se ha instalado un conjunto de poleas, según la primera forma de realización de la invención. Figure 8: shows a perspective view of a floating platform, where a set of pulleys has been installed, according to the first embodiment of the invention.
Figura 9: muestra una vista esquemática de la roldana y la pasteca en su posición de montaje, según la segunda forma de realización de la invención. Figura 10: muestra una vista en perspectiva de detalle de la pasteca y la roldana en su posición de montaje, según la segunda forma de realización de la invención. Figure 9: shows a schematic view of the sheave and the block in their mounting position, according to the second embodiment of the invention. Figure 10: shows a detailed perspective view of the block and the sheave in their mounting position, according to the second embodiment of the invention.
Figura 11 : muestra una vista en perspectiva de la posición relativa de la pieza de conexión, el eje de basculación y la roldana de la polea, según la segunda forma de realización de la invención. Figure 11: shows a perspective view of the relative position of the connecting piece, the tilting axis and the pulley sheave, according to the second embodiment of the invention.
Figura 12: muestra una vista en perspectiva de la pasteca y la roldana en su posición de montaje, según la segunda forma de realización de la invención, en donde se representa la pieza de conexión de la polea a la plataforma flotante. Figure 12: shows a perspective view of the block and the sheave in their mounting position, according to the second embodiment of the invention, where the connection piece of the pulley to the floating platform is represented.
Figura 13: muestra una vista en perspectiva de una plataforma flotante, en donde se ha instalado un conjunto de poleas, según la segunda forma de realización de la invención. Figure 13: shows a perspective view of a floating platform, where a set of pulleys has been installed, according to the second embodiment of the invention.
Descripción detallada Detailed description
La presente invención se refiere, tal y como se ha mencionado anteriormente, a una polea (100) para el fondeo de una plataforma flotante (400). The present invention refers, as mentioned above, to a pulley (100) for anchoring a floating platform (400).
En la Figura 1 a se ha representado una polea (100’) convencional, con su roldana (300’) y su pasteca (200’), en donde la roldana (300’) comprende una pluralidad de radios (300b) que unen el perímetro de la roldana (300’) con un buje (300a) central. Figure 1 a shows a conventional pulley (100'), with its sheave (300') and its block (200'), where the sheave (300') comprises a plurality of spokes (300b) that join the perimeter of the sheave (300') with a central bushing (300a).
Como puede verse, el cable de fondeo (700) discurre a lo largo de un sector del perímetro de la roldana (300’). Por tanto, la tensión que el cable de fondeo (700) comunica a la roldana (300’) es transmitida hacia el buje (300a) de la roldana (300’) solamente a través de los radios (300b) situados en correspondencia con el sector del perímetro de la roldana (300’) por el cual discurre el cable de fondeo (700). En la Figura 1b se ha representado la roldana (300’) de la polea (100’) de la Figura 1 a, con una rotura que separa el sector de la roldana (300’) correspondiente a la zona por la cual discurre el cable de fondeo (700) y los radios (300b) por los que se transmite la tensión del cable de fondeo (700) al buje (300a). Las fuerzas transmitidas por el cable de fondeo (700) a la polea (100’) se han representado como pequeñas flechas sobre los radios (300b) sobre los que actúan. As can be seen, the anchor cable (700) runs along a sector of the perimeter of the sheave (300'). Therefore, the tension that the anchor cable (700) communicates to the sheave (300') is transmitted to the bushing (300a) of the sheave (300') only through the spokes (300b) located in correspondence with the sector of the perimeter of the sheave (300') through which the anchoring cable (700) runs. Figure 1b shows the sheave (300') of the pulley (100') of Figure 1 a, with a break that separates the sector of the sheave (300') corresponding to the area through which the cable runs. of anchoring (700) and the spokes (300b) through which the tension of the anchoring cable (700) is transmitted to the bushing (300a). The forces transmitted by the anchor cable (700) to the pulley (100') have been represented as small arrows on the spokes (300b) on which they act.
En el caso de la presente invención, la polea (100) está configurada para ser instalada en una plataforma flotante (400), por ejemplo, en los extremos de unos brazos estructurales salientes de la plataforma flotante (400), tal y como se muestra en la Figura 8. In the case of the present invention, the pulley (100) is configured to be installed on a floating platform (400), for example, at the ends of protruding structural arms of the floating platform (400), as shown. in Figure 8.
Cada polea (100) comprende una pasteca (200) o chasis, y al menos una roldana (300) o anillo. Each pulley (100) comprises a block (200) or chassis, and at least one pulley (300) or ring.
La Figura 2a muestra una vista en perspectiva de la pasteca (200) de la polea (100), según una primera forma de realización de la polea (100) objeto de la presente invención. Figure 2a shows a perspective view of the block (200) of the pulley (100), according to a first embodiment of the pulley (100) object of the present invention.
Según esta primera forma de realización de la polea (100), la pasteca (200) tiene una geometría de segmento de corona circular, abarcando aproximadamente 120e de arco de corona circular. According to this first embodiment of the pulley (100), the block (200) has a circular crown segment geometry, covering approximately 120 e of circular crown arc.
La pasteca (200) comprende una pluralidad de rodetes interiores (201) distribuidos a lo largo del perímetro exterior del segmento de corona circular de la pasteca (200). The block (200) comprises a plurality of interior impellers (201) distributed along the outer perimeter of the circular crown segment of the block (200).
Estos rodetes interiores (201 ) están situados entre dos chapas (202) que hacen de carcasa de la pasteca (200). These inner impellers (201) are located between two plates (202) that act as the casing of the block (200).
Los rodetes interiores (201) comprenden un cuerpo cilindrico (201 a), un primer eje (201b) y, opcionalmente, unas guías laterales (201c). El primer eje (201 b) tiene una longitud suficiente para atravesar el cuerpo cilindrico (201a) y, en su caso, las guías laterales (201c) del rodete interior (201), así como las chapas (202) de la pasteca (200). The inner impellers (201) comprise a cylindrical body (201 a), a first axis (201b) and, optionally, lateral guides (201c). The first axis (201 b) has a sufficient length to pass through the cylindrical body (201a) and, where appropriate, the lateral guides (201c) of the inner impeller (201), as well as the plates (202) of the block (200 ).
La pasteca (200) está configurada para colocarse y quedar situada por el interior del perímetro de la roldana (300), tal y como se muestra en la Figura 2a, en la Figura 2b y en la Figura 2c. The block (200) is configured to be placed and located inside the perimeter of the sheave (300), as shown in Figure 2a, Figure 2b and Figure 2c.
Los rodetes interiores (201 ), y la unión de su primer eje (201b) con las chapas (202) de la pasteca (200), están configurados para soportar el peso de la roldana (300), así como la tensión que el cable de fondeo (700) ejerza sobre la polea (100). The inner wheels (201), and the union of its first axis (201b) with the plates (202) of the block (200), are configured to support the weight of the sheave (300), as well as the tension that the cable anchoring force (700) exerts on the pulley (100).
Las guías laterales (201c) de los rodetes interiores (201) (en caso de existir) tienen geometría de disco plano y están configuradas para quedar situadas a ambos lados de un nervio interior (301a) radial de la roldana (300), configurando una especie de carril para dicho nervio interior (301a) radial de la roldana (300). En la Figura 3a se muestra un ejemplo de un rodete interior (201 ) con estas guías laterales (201c) situadas a ambos lados del nervio interior (301 a) de la roldana (300). The lateral guides (201c) of the inner impellers (201) (if any) have flat disc geometry and are configured to be located on both sides of a radial inner rib (301a) of the roller (300), configuring a kind of rail for said inner radial nerve (301a) of the roller (300). Figure 3a shows an example of an inner impeller (201) with these lateral guides (201c) located on both sides of the inner rib (301 a) of the roller (300).
Alternativamente, según se muestra en la Figura 3b, los rodetes interiores (201 ) pueden carecer de dichas guías laterales (201c), y pueden estar configurados para rodar por el interior de un riel (301 b) situado en correspondencia con el nervio interior (301 a) radial de la roldana (300). En este caso, opcionalmente, según se muestra en la Figura 3c, los rodetes interiores (201) pueden comprender también una zona exterior de rodadura (201 d), configurado para servir de apoyo radial a los laterales del nervio interior (301 a) radial. Alternatively, as shown in Figure 3b, the inner wheels (201) may lack said lateral guides (201c), and may be configured to roll inside a rail (301 b) located in correspondence with the inner rib ( 301 a) radial of the sheave (300). In this case, optionally, as shown in Figure 3c, the inner wheels (201) can also comprise an outer rolling area (201 d), configured to serve as radial support for the sides of the inner radial rib (301 a). .
Por último, también se contempla la variante en la que los rodetes interiores (201) comprenden guías laterales (201c) configuradas para quedar dispuestas a ambos lados de un nervio interior (301 a) radial de la roldana (300), donde dicho nervio interior (301 a) radial a su vez dispone de un riel (301 b) interior. En la Figura 3d se muestra un ejemplo de esta combinación de rodete interior (201) con guías laterales (201a) y roldana (300) con nervio interior (301a) radial que dispone de un riel (301b) interior. Como se puede observar en las diferentes Figuras, la roldana (300) puede comprender una garganta (301) adaptada para el paso de un único cable de fondeo (700) (garganta (301 ) simple, como se muestra en la Figura 3a y en la Figura 3b) o una garganta (301 ) adaptada para el paso de dos cables de fondeo (700) (garganta (301 ) doble, como se muestra en la Figura 3c y en la Figura 3d), o una garganta (301 ) adaptada para el paso de tres o más cables de fondeo (700) (no representada en las Figuras). Finally, the variant is also contemplated in which the inner wheels (201) comprise lateral guides (201c) configured to be arranged on both sides of a radial inner rib (301 a) of the roller (300), where said inner rib (301 a) radial in turn has an interior rail (301 b). Figure 3d shows an example of this combination of inner impeller (201) with lateral guides (201a) and roller (300) with inner radial rib (301a) that has an inner rail (301b). As can be seen in the different Figures, the sheave (300) may comprise a throat (301) adapted for the passage of a single anchor cable (700) (simple throat (301), as shown in Figure 3a and in Figure 3b) or a throat (301) adapted for the passage of two anchor cables (700) (double throat (301), as shown in Figure 3c and Figure 3d), or a throat (301) adapted for the passage of three or more anchor cables (700) (not shown in the Figures).
Tal y como se muestra en la Figura 2d, la polea (100) comprende también al menos un rodete exterior (203) y, preferentemente, al menos dos rodetes exteriores (203). Estos rodetes exteriores (203) comprenden también un cuerpo central cilindrico (203a) y, a cada lado del cuerpo central cilindrico (203a), dos terminaciones cilindro cónicas (203b), con su parte cilindrica configurada para apoyarse sobre unos rebordes (302) de la roldana (300). As shown in Figure 2d, the pulley (100) also comprises at least one outer wheel (203) and, preferably, at least two outer wheels (203). These outer impellers (203) also comprise a cylindrical central body (203a) and, on each side of the cylindrical central body (203a), two conical cylinder ends (203b), with their cylindrical part configured to rest on flanges (302) of the sheave (300).
Los rodetes exteriores (203) comprenden un segundo eje (203c) con una longitud suficiente para atravesar el cuerpo central cilindrico (203a), las terminaciones cilindro cónicas (203b) y unas pletinas laterales (203d) configuradas para conectar los rodetes exteriores (203) con las chapas (202) de la pasteca (200) (por ejemplo, en correspondencia con los primeros ejes (201b) de algunos de los rodetes interiores (201). The outer wheels (203) comprise a second shaft (203c) with a length sufficient to pass through the cylindrical central body (203a), the conical cylinder ends (203b) and some side plates (203d) configured to connect the outer wheels (203). with the plates (202) of the block (200) (for example, in correspondence with the first axes (201b) of some of the inner impellers (201).
Ante una situación de oleaje la plataforma flotante (400) puede ascender y el movimiento de ascenso de la plataforma flotante puede dotar a las roldanas (300) de las poleas (100) de la inercia suficiente para que, cuando la plataforma flotante (400) deje de ascender y los cables de fondeo (700) se destensen, las roldanas (300) pudieran despegarse de los rodetes interiores (201) y desmontarse de la polea (100). Los rodetes exteriores (203) impiden en estas situaciones que la roldana (300) pueda desmontarse de la pasteca (200) de la polea (100). In a wave situation, the floating platform (400) can rise and the upward movement of the floating platform can provide the rollers (300) of the pulleys (100) with sufficient inertia so that, when the floating platform (400) stop ascending and the anchor cables (700) become slack, the sheaves (300) could detach from the inner wheels (201) and be dismantled from the pulley (100). In these situations, the outer impellers (203) prevent the sheave (300) from being removed from the block (200) of the pulley (100).
La polea (100) comprende un eje de basculación (500) formado por un solo tramo continuo o por dos o más tramos alineados. En la Figura 4 se observa la polea (100), según su primera forma de realización, y se muestra un ejemplo en donde el eje de basculación (500) está formado por dos tramos separados y alineados. The pulley (100) comprises a tilting axis (500) formed by a single continuous section or by two or more aligned sections. Figure 4 shows the pulley (100), according to its first embodiment, and an example is shown where the tilting axis (500) is formed by two separate and aligned sections.
En la primera forma de realización de la polea (100) de la invención, el eje de basculación (500) queda situado por el interior de la roldana (300). Para este fin, la pasteca (200) comprende unos primeros cojinetes (204) conectados con las chapas (202) y dirigidos hacia el interior de la geometría en forma de segmento de corona circular de la pasteca (200). El eje de basculación (500) está configurado para quedar insertado en estos primeros cojinetes (204), de manera que la polea (100) puede bascular en torno a dicho eje de basculación (500). In the first embodiment of the pulley (100) of the invention, the tilting axis (500) is located inside the sheave (300). For this purpose, the block (200) comprises first bearings (204) connected to the plates (202) and directed towards the interior of the geometry in the form of a circular crown segment of the block (200). The tilting axis (500) is configured to be inserted in these first bearings (204), so that the pulley (100) can tilt around said tilting axis (500).
El hecho de que el eje de basculación (500) quede situado por el interior de la roldana (300) resulta ventajoso para evitar que, ante los movimientos de la plataforma flotante (400), la tensión de los cables de fondeo (700) pueda reorientar las poleas (100) haciendo que las roldanas (300) choquen contra la plataforma flotante (400). The fact that the tilting axis (500) is located inside the sheave (300) is advantageous to prevent, due to the movements of the floating platform (400), the tension of the anchor cables (700) from being reorient the pulleys (100) causing the sheaves (300) to collide with the floating platform (400).
En la Figura 5 se ¡lustra, a modo de comparación, el comportamiento de dos poleas (100), en donde la polea (100) de la izquierda comprende su eje de basculación (500) situado por el exterior (y, evidentemente, por encima) de la roldana (300), y la polea (100) de la derecha tiene su eje de basculación (500) situado por el interior de la roldana (300). Las dos poleas (100) están situadas a la misma altura. Para cada una de las dos poleas (100), se representa la situación de reposo en donde las roldanas (300) cuelgan verticalmente del eje de basculación (500) y el plano de la roldana (300) se sitúa paralelo al plano de un brazo estructural saliente de la plataforma flotante (400), y la situación en la que los planos de las roldanas (300) convergen hacia el brazo estructural saliente de la plataforma flotante (400), debido a una reorientación del plano de las roldanas (300) producida por la tensión de los cables de fondeo (700), que provoca que las poleas (100) basculen en torno a su eje de basculación (500). Figure 5 illustrates, by way of comparison, the behavior of two pulleys (100), where the pulley (100) on the left includes its tilting axis (500) located on the outside (and, obviously, on the outside). above) of the sheave (300), and the pulley (100) on the right has its tilt axis (500) located inside the sheave (300). The two pulleys (100) are located at the same height. For each of the two pulleys (100), the rest situation is represented where the sheaves (300) hang vertically from the tilting axis (500) and the plane of the sheave (300) is located parallel to the plane of an arm. protruding structural arm of the floating platform (400), and the situation in which the planes of the rollers (300) converge towards the protruding structural arm of the floating platform (400), due to a reorientation of the plane of the rollers (300) produced by the tension of the anchor cables (700), which causes the pulleys (100) to tilt around their tilt axis (500).
Como se puede observar, para un mismo ángulo de reorientación o basculación, la roldana (300) de la polea (100) de la derecha (la que tiene su eje de basculación por el interior de la roldana (300)) queda más alejada de la plataforma flotante (400) que la roldana (300) de la polea (100) de la izquierda (que tiene su eje de basculación (500) por el exterior de la roldana (300)). As can be seen, for the same angle of reorientation or tilt, the pulley (300) of the pulley (100) on the right (the one with its tilt axis inside the pulley (300)) is furthest from the floating platform (400) than the roller (300) of the pulley (100) on the left (which has its tilt axis (500) on the outside of the sheave (300)).
En la Figura 6 puede observarse una vista en perspectiva de la pasteca (200) de la polea (100), según su primera forma de realización, en donde puede apreciarse el eje de basculación (500) montado o insertado en los primeros cojinetes (204), y donde pueden verse en detalle también los rodetes exteriores (203) conectados por medio de las pletinas laterales (203d) a las chapas (202) de la pasteca (200). In Figure 6, a perspective view of the block (200) of the pulley (100) can be seen, according to its first embodiment, where the tilting axis (500) can be seen mounted or inserted in the first bearings (204). ), and where the outer impellers (203) connected by means of the side plates (203d) to the plates (202) of the block (200) can also be seen in detail.
En la Figura 7 puede observarse la polea (100), según su primera forma de realización. En esta Figura 7 se muestra un posible diseño de la pieza de conexión (600) configurada para unir la pasteca (200) de la polea (100) a la plataforma flotante (400). Como puede verse, la pieza de conexión (600) comprende unos segundos cojinetes (601) configurados para quedar posicionados en correspondencia con los primeros cojinetes (204) de la pasteca (200), y para que el eje de basculación (500) quede insertado tanto en los primeros cojinetes (204) como en los segundos cojinetes (601). In Figure 7 the pulley (100) can be seen, according to its first embodiment. This Figure 7 shows a possible design of the connection piece (600) configured to join the block (200) of the pulley (100) to the floating platform (400). As can be seen, the connection piece (600) comprises second bearings (601) configured to be positioned in correspondence with the first bearings (204) of the block (200), and so that the tilt axis (500) is inserted both in the first bearings (204) and in the second bearings (601).
En la Figura 8 se muestra una plataforma flotante (400) con un conjunto de poleas (100), según la primera forma de realización de la invención, unidas a dicha plataforma flotante (400) mediante sus correspondientes piezas de conexión (600). Figure 8 shows a floating platform (400) with a set of pulleys (100), according to the first embodiment of the invention, joined to said floating platform (400) by means of their corresponding connection pieces (600).
Según una segunda forma de realización de la polea (100) de la invención, la pasteca (200) de la polea (100) con sus dos chapas (202) está configurada para quedar dispuesta por el exterior de la roldana (300). According to a second embodiment of the pulley (100) of the invention, the block (200) of the pulley (100) with its two plates (202) is configured to be arranged on the outside of the sheave (300).
En la Figura 9 se muestra un ejemplo de esta segunda forma de realización de la polea (100), en donde puede observarse la pasteca (200) y la parte superior de la roldana (300). Figure 9 shows an example of this second embodiment of the pulley (100), where the block (200) and the upper part of the sheave (300) can be seen.
Como puede verse, según esta segunda forma de realización, los rodetes exteriores (203) quedan dispuestos entre las chapas (202) de la pasteca (200), mientras que los rodetes interiores (201) quedan conectados con las chapas (202) de la pasteca (200) mediante unas extensiones de chapa (202a). As can be seen, according to this second embodiment, the outer wheels (203) are arranged between the plates (202) of the block (200), while the wheels The interior parts (201) are connected to the sheets (202) of the block (200) by means of sheet extensions (202a).
En esta segunda forma de realización de la polea (100), el eje de basculación (500) queda situado por el exterior de la roldana (300). El eje de basculación (500) está configurado para quedar insertado en los primeros cojinetes (204), los cuales en esta segunda forma de realización quedan situados dentro del volumen definido por las chapas (202) de la pasteca (200). In this second embodiment of the pulley (100), the tilting axis (500) is located on the outside of the pulley (300). The tilting axis (500) is configured to be inserted in the first bearings (204), which in this second embodiment are located within the volume defined by the plates (202) of the block (200).
En la Figura 10 se muestra una vista en perspectiva de la segunda forma de realización de la polea (100). Figure 10 shows a perspective view of the second embodiment of the pulley (100).
En la Figura 11 se muestra un posible diseño de la pieza de conexión (600) configurada para conectar la polea (100) con la plataforma flotante (400), según esta segunda forma de realización de la polea (100). Como puede verse, el eje de basculación (500) está configurado para quedar inserto en los segundos cojinetes (601 ) de la pieza de conexiónFigure 11 shows a possible design of the connection piece (600) configured to connect the pulley (100) with the floating platform (400), according to this second embodiment of the pulley (100). As can be seen, the tilt axis (500) is configured to be inserted in the second bearings (601) of the connection piece
(600), y para quedar situado por el exterior de la roldana (300). (600), and to be located on the outside of the sheave (300).
Los segundos cojinetes (601) están configurados para quedar insertos en unas ranuras (205) de las chapas (202) de la pasteca (200) (ver Figura 8). The second bearings (601) are configured to be inserted in slots (205) of the plates (202) of the block (200) (see Figure 8).
Debido a cuestiones de diseño, se prevé que el peso que tengan que soportar los arbotantes (602) de las piezas de conexión (600) sea diferente según la aplicación de tensiones de los cables de fondeo (700) en un sector u otro de la roldana (300). Por este motivo, se representa uno de los arbotantes (602) y su correspondiente segundo cojineteDue to design issues, it is expected that the weight that the buttresses (602) of the connecting pieces (600) have to support will be different depending on the application of tensions of the anchor cables (700) in one sector or another of the sheave (300). For this reason, one of the flying buttresses (602) and its corresponding second bearing are represented.
(601) de un extremo de la pieza de conexión (600), de mayor grosor que el arbotante (602) y su correspondiente segundo cojinete (601) del otro extremo de la pieza de conexión (600). Por este mismo motivo, el ángulo de dichos arbotantes (602) con respecto al plano de la roldana (300) también es diferente en uno y otro arbotante (602), lo cual implica que las dimensiones de una y otra ranura (205) de las chapas (202) también sean diferentes (ver Figura 9). En la Figura 12 se muestra la pieza de conexión (600) conectada a la pasteca (200) de la polea (100), según la segunda forma de realización de la polea (100). Por último, en la Figura 13 se muestra una plataforma flotante (400) con un conjunto de poleas (100), según la segunda forma de realización de la invención, unidas a dicha plataforma flotante (400) mediante sus correspondientes piezas de conexión (600). (601) at one end of the connection piece (600), thicker than the buttress (602) and its corresponding second bearing (601) at the other end of the connection piece (600). For this same reason, the angle of said buttresses (602) with respect to the plane of the sheave (300) is also different in each of the buttresses (602), which implies that the dimensions of each slot (205) of the sheets (202) are also different (see Figure 9). Figure 12 shows the connection piece (600) connected to the block (200) of the pulley (100), according to the second embodiment of the pulley (100). Finally, Figure 13 shows a floating platform (400) with a set of pulleys (100), according to the second embodiment of the invention, joined to said floating platform (400) by means of their corresponding connection pieces (600). ).

Claims

REIVINDICACIONES Polea (100) para el fondeo de una plataforma flotante (400), donde la polea (100) comprende una roldana (300) y una pasteca (200), donde la polea (100) está caracterizada por que la pasteca (200) comprende un conjunto de rodetes interiores (201) distribuidos a lo largo de un segmento de circunferencia y configurados para quedar dispuestos en contacto con la roldana (300) por el interior del anillo definido por la roldana (300), donde la polea (100) comprende un eje de basculación (500) configurado para quedar inserto en unos primeros cojinetes (204) de la pastecaCLAIMS Pulley (100) for anchoring a floating platform (400), where the pulley (100) comprises a sheave (300) and a block (200), where the pulley (100) is characterized in that the block (200) It comprises a set of interior wheels (201) distributed along a segment of circumference and configured to be arranged in contact with the pulley (300) inside the ring defined by the pulley (300), where the pulley (100) It comprises a tilting axis (500) configured to be inserted in first bearings (204) of the block.
(200), donde la polea (100) está configurada para quedar conectada a la plataforma flotante (400) mediante una pieza de conexión (600), donde la pieza de conexión (600) está configurada para quedar conectada al eje de basculación (500) de la polea (100) mediante unos segundos cojinetes (601 ) de manera que, en posición de instalación de la polea (100) en la plataforma flotante (400), la roldana (300) está soportada únicamente por los rodetes interiores (201). Polea (100) según la reivindicación 1 , caracterizada por que los primeros cojinetes (204) están configurados para quedar dispuestos por el interior del anillo definido por la roldana (600), de manera que el eje de basculación (500) está también configurado para quedar dispuesto por el interior del anillo definido por la roldana (300). Polea (100) según la reivindicación 2, caracterizada por que los rodetes interiores(200), where the pulley (100) is configured to be connected to the floating platform (400) by means of a connection piece (600), where the connection piece (600) is configured to be connected to the tilt axis (500). ) of the pulley (100) by means of second bearings (601) so that, in the installation position of the pulley (100) on the floating platform (400), the pulley (300) is supported only by the inner wheels (201 ). Pulley (100) according to claim 1, characterized in that the first bearings (204) are configured to be arranged inside the ring defined by the sheave (600), so that the tilt axis (500) is also configured to be arranged inside the ring defined by the sheave (300). Pulley (100) according to claim 2, characterized in that the inner wheels
(201) comprenden unas guías laterales (201c) con una geometría de disco plano y configuradas para quedar situadas a ambos lados de un nervio interior (301 a) radial de la roldana (300). Polea (100) según la reivindicación 3, caracterizada por que el nervio interior (301a) radial de la roldana (300) comprende un riel (301b) interior. 5. Polea (100) según la reivindicación 2, caracterizada por que los rodetes interiores (201) están configurados para discurrir por el interior de un riel (301b) realizado en un nervio interior (301 a) radial de la roldana (300). (201) comprise lateral guides (201c) with a flat disc geometry and configured to be located on both sides of an inner radial rib (301a) of the roller (300). Pulley (100) according to claim 3, characterized in that the inner radial rib (301a) of the sheave (300) comprises an inner rail (301b). 5. Pulley (100) according to claim 2, characterized in that the inner wheels (201) are configured to run inside a rail (301b) made on an inner radial rib (301 a) of the sheave (300).
6. Polea (100) según la reivindicación 5, caracterizada por que los rodetes interiores (201) comprenden unas zonas exteriores de rodadura (201 d) a ambos extremos del rodete interior (201), que sirven de apoyo radial a los laterales del nervio interior (301a) radial de la roldana (300). 6. Pulley (100) according to claim 5, characterized in that the inner wheels (201) comprise outer rolling areas (201 d) at both ends of the inner wheel (201), which serve as radial support for the sides of the rib. interior (301a) radial of the sheave (300).
7. Polea (100) según cualquiera de las reivindicaciones 2 a 6, caracterizada por que comprende al menos un rodete exterior (203) configurado para quedar dispuesto en contacto con la roldana (300) por el exterior del anillo definido por la roldana (300), donde el al menos un rodete exterior (203) está conectado con unas chapas (202) laterales de la pasteca (200) mediante unas pletinas laterales (203d). 7. Pulley (100) according to any of claims 2 to 6, characterized in that it comprises at least one outer wheel (203) configured to be arranged in contact with the sheave (300) on the outside of the ring defined by the sheave (300). ), where the at least one outer impeller (203) is connected to some side plates (202) of the block (200) by means of side plates (203d).
8. Polea (100) según la reivindicación 1 , caracterizada por que los primeros cojinetes (204) están configurados para quedar dispuestos por el exterior del anillo definido por la roldana (600), de manera que el eje de basculación (500) está también configurado para quedar dispuesto por el exterior del anillo definido por la roldana (300). 8. Pulley (100) according to claim 1, characterized in that the first bearings (204) are configured to be arranged on the outside of the ring defined by the sheave (600), so that the tilt axis (500) is also configured to be arranged on the outside of the ring defined by the sheave (300).
9. Polea (100) según la reivindicación 8, caracterizada por que los rodetes interiores (201) comprenden unas guías laterales (201c) con una geometría de disco plano y configuradas para quedar situadas a ambos lados de un nervio interior (301 a) radial de la roldana (300). 9. Pulley (100) according to claim 8, characterized in that the inner wheels (201) comprise lateral guides (201c) with a flat disc geometry and configured to be located on both sides of an inner radial rib (301 a). of the sheave (300).
10. Polea (100) según la reivindicación 9, caracterizada por que el nervio interior (301a) radial de la roldana (300) comprende un riel (301b) interior. 11. Polea (100) según la reivindicación 8, caracterizada por que los rodetes interiores (201) están configurados para discurrir por el interior de un riel (301b) realizado en un nervio interior (301 a) radial de la roldana (300). 10. Pulley (100) according to claim 9, characterized in that the inner radial rib (301a) of the sheave (300) comprises an inner rail (301b). 11. Pulley (100) according to claim 8, characterized in that the inner wheels (201) are configured to run inside a rail (301b) made on an inner radial rib (301 a) of the sheave (300).
12. Polea (100) según la reivindicación 11 , caracterizada por que los rodetes interiores (201) comprenden unas zonas exteriores de rodadura (201 d) a ambos extremos del rodete interior (201), que sirven de apoyo radial a los laterales del nervio interior (301a) radial de la roldana (300). 12. Pulley (100) according to claim 11, characterized in that the inner wheels (201) comprise outer rolling areas (201 d) at both ends of the inner wheel (201), which serve as radial support for the sides of the rib. interior (301a) radial of the sheave (300).
13. Polea (100) según cualquiera de las reivindicaciones 8 a 12, caracterizada por que los rodetes interiores (201 ) están conectados con unas chapas (202) laterales de la pasteca (200) mediante unas extensiones de chapa (202a). 13. Pulley (100) according to any of claims 8 to 12, characterized in that the inner wheels (201) are connected to lateral plates (202) of the block (200) by means of plate extensions (202a).
14. Polea (100) según cualquiera de las reivindicaciones 8 a 13, caracterizada por que comprende al menos un rodete exterior (203) configurado para quedar dispuesto en contacto con la roldana (300) por el exterior del anillo definido por la roldana (300), donde el al menos un rodete exterior (203) está dispuesto en el interior de la pasteca (200). 14. Pulley (100) according to any of claims 8 to 13, characterized in that it comprises at least one outer impeller (203) configured to be arranged in contact with the sheave (300) on the outside of the ring defined by the sheave (300). ), where the at least one outer impeller (203) is arranged inside the block (200).
15. Polea (100) según la reivindicación 7 ó 14, caracterizado por que comprende al menos dos rodetes exteriores (203). 15. Pulley (100) according to claim 7 or 14, characterized in that it comprises at least two outer wheels (203).
16. Polea (100) según cualquiera de las reivindicaciones anteriores, caracterizada por que la roldana (300) comprende una garganta (301) simple, configurada para albergar un único cable de fondeo (700). 16. Pulley (100) according to any of the preceding claims, characterized in that the sheave (300) comprises a simple groove (301), configured to house a single anchor cable (700).
17. Polea (100) según cualquiera de las reivindicaciones 1 a 15, caracterizada por que la roldana (300) comprende una garganta (301 ) múltiple, configurada para albergar dos o más cables de fondeo (700). 17. Pulley (100) according to any of claims 1 to 15, characterized in that the sheave (300) comprises a multiple groove (301), configured to house two or more anchor cables (700).
PCT/IB2023/058130 2022-11-08 2023-08-11 Pulley for anchoring a floating platform WO2024100462A1 (en)

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Citations (6)

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US1010018A (en) * 1911-04-08 1911-11-28 Emil Christensen Snatch-block.
GB778612A (en) * 1954-08-03 1957-07-10 Niels Matheson Improvements in or relating to sheaves
JPS52110174U (en) * 1976-02-17 1977-08-22
US20050072347A1 (en) * 2003-10-03 2005-04-07 Niebur Alvin J. Fairlead with integrated chain stopper
WO2008034096A1 (en) * 2006-09-14 2008-03-20 Wireline Technologies, Inc. Ring sheave
ES2629867A2 (en) 2015-11-24 2017-08-16 Antonio Luis GARCÍA FERRÁNDEZ System and procedure of anchoring for floating marine platforms, which prevents the movement of pitch and allows to capture the energy of the waves (Machine-translation by Google Translate, not legally binding)

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Publication number Priority date Publication date Assignee Title
KR20100087095A (en) * 2007-09-13 2010-08-03 플로팅 윈드팜스 코포레이션 Offshore vertical-axis wind turbine and associated systems and methods
CN106741698A (en) * 2017-01-09 2017-05-31 中国电建集团中南勘测设计研究院有限公司 It is a kind of to draw anchor system and its floating photovoltaic plant under water
CN108412706B (en) * 2018-04-10 2019-12-31 中国石油大学(华东) Offshore floating type wind driven generator with adjustable balance

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1010018A (en) * 1911-04-08 1911-11-28 Emil Christensen Snatch-block.
GB778612A (en) * 1954-08-03 1957-07-10 Niels Matheson Improvements in or relating to sheaves
JPS52110174U (en) * 1976-02-17 1977-08-22
US20050072347A1 (en) * 2003-10-03 2005-04-07 Niebur Alvin J. Fairlead with integrated chain stopper
WO2008034096A1 (en) * 2006-09-14 2008-03-20 Wireline Technologies, Inc. Ring sheave
ES2629867A2 (en) 2015-11-24 2017-08-16 Antonio Luis GARCÍA FERRÁNDEZ System and procedure of anchoring for floating marine platforms, which prevents the movement of pitch and allows to capture the energy of the waves (Machine-translation by Google Translate, not legally binding)

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