WO2013158006A1 - Unité immergée pour fixer de manière pivotante une partie allongée à une fondation - Google Patents

Unité immergée pour fixer de manière pivotante une partie allongée à une fondation Download PDF

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Publication number
WO2013158006A1
WO2013158006A1 PCT/SE2013/000044 SE2013000044W WO2013158006A1 WO 2013158006 A1 WO2013158006 A1 WO 2013158006A1 SE 2013000044 W SE2013000044 W SE 2013000044W WO 2013158006 A1 WO2013158006 A1 WO 2013158006A1
Authority
WO
WIPO (PCT)
Prior art keywords
unit
foundation
submerged unit
submerged
elongated portion
Prior art date
Application number
PCT/SE2013/000044
Other languages
English (en)
Inventor
Hans Lindén
Original Assignee
Aktiebolaget Skf
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 Aktiebolaget Skf filed Critical Aktiebolaget Skf
Priority to EP13778737.0A priority Critical patent/EP2839174A4/fr
Publication of WO2013158006A1 publication Critical patent/WO2013158006A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
    • 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
    • B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
    • B63B2021/501—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers by means of articulated towers, i.e. slender substantially vertically arranged structures articulated near the sea bed
    • 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
    • B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/91—Mounting on supporting structures or systems on a stationary structure
    • F05B2240/917—Mounting on supporting structures or systems on a stationary structure attached to cables
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/91—Mounting on supporting structures or systems on a stationary structure
    • F05B2240/917—Mounting on supporting structures or systems on a stationary structure attached to cables
    • F05B2240/9174—Mounting on supporting structures or systems on a stationary structure attached to cables of kite type with a turbine and a flying pattern
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/97—Mounting on supporting structures or systems on a submerged structure

Definitions

  • a submerged unit for pivotally securing an elongated portion to a foundation.
  • the invention relates to sub sea applications, such as sub sea arrangements for generating electrical energy from tidal water, water streams or waves.
  • the invention regards a submerged unit for securing an elongated portion, such as a wire, to a foundation on the bottom of the sea.
  • the invention regards a device for locking a submerged unit to a foundation on the bottom of the sea.
  • Sub sea applications can be very demanding in many aspects. For instance, it is often difficult and also expensive to perform maintenance and repair work on such applications. Furthermore, installation of sub sea applications is often difficult. Especially if the application is located on the bottom of the sea it will be hard to perform e.g. repair and maintenance work on the device due to the harsh environment on the bottom, i.e. low visibility, high pressures etc.
  • One application that needs to be secured to the bottom of the sea is a tidal water power plant, such as for instance described in patent application EP2295792A2.
  • This application is secured to the bottom via e.g. a wire.
  • the kite that moves in the water and thereby generates electrical energy via a turbine also generates very high forces at the securing location of the wire at the bottom of the sea.
  • An object of the invention is thus to provide an arrangement that is very robust and reliable and that can handle the high forces generated from e.g. a wire.
  • this object has been achieved by a submerged unit for securing an elongated portion such as a wire to a foundation.
  • the unit comprises a first hollow part presenting an inner spherical surface and a second part presenting an outer spherical surface,.
  • the second part is received in the first hollow part such that a relative rotation between the first and second part around a pivot point can be accomplished.
  • the first or second part further presents a connecting means, which connects the elongated portion to the unit, and a housing which at least partly surrounds the first part to seal off the first and second part from the surrounding environment.
  • This design has the advantage of being very robust and reliable and also in that it can perform a three axis rotational movement to secure a wire that moves in the water, for instance a wire connected to a submerged tidal water power plant.
  • the spherical surface of the second part essentially matches the spherical surface of the first part.
  • the two matching surfaces of the first and second part may be sliding against each other with a lubrication film in-between and thereby function as a sliding bearing (also known as plain bearing).
  • the surfaces may be made of a material that is good for enabling a relative sliding, such as a steel or a polymer.
  • a polymer may for instance be a polymer surface that can accommodate a lubricant, such as oil.
  • rolling elements are interposed between the two spherical surfaces.
  • the spherical surfaces and the rolling elements are arranged such that a relative rotation between the two parts can be accomplished.
  • the rolling elements may e.g. be in the form of rollers or balls.
  • the submerged unit further comprises a through-hole from the region of the connecting means via the pivot point.
  • the through hole may be used to accommodate different types of devices etc and to integrate sensitive devices into the submerged unit.
  • the submerged unit further comprises a retractable elastic means, such as a coil spring, in the through-hole, the retractable means being configured to strive to retain the first and second part in a specific relative rotational position to each other. If for instance, in the case of a tidal power plant, the movement of the kite is stopped, there is a risk that the kite will start to move in the water in an uncontrolled manner. An integrated spring in the device would ascertain that the kite will remain in an essentially upward position in the water.
  • the retractable elastic means may be any type of means that is able to strive to retain the first and second part in a specific position.
  • at least one cable is present in the through-hole.
  • the cable may be configured to transfer electrical energy and/or electrical signals. It is advantageous to be able to integrate cables etc. into the submerged unit instead of leading cables etc. outside the unit. This will increase robustness and the reliability of the unit.
  • the submerged unit further comprises a sensor for sensing a relative rotation between the first and second part around at least one axial direction. There may be a need to be able to determine an angular position of the elongated means which is connected to the submerged unit. A sensor in the unit would be able to determine this angular position.
  • the senor is integrated in a bearing.
  • the bearing may be located such that it can measure angular displacement around one axis.
  • the sensor is located within the housing.
  • the sensor is also integrated in any of the first part or the second part. The robustness and reliability of the unit, and also the sensing function, will be maintained by integrating the sensor into the housing and also into one of the first and second parts.
  • a moisture sensing means is integrated in the unit. By measuring moisture in the unit it will be possible to get an indication of the condition of the unit. If the moisture level would exceed a certain value it could be an indication of that the unit needs to be reconditioned or replaced.
  • the signal from the sensing means may be sent to a computer means that calculates a value indicative of the condition of the unit.
  • the unit further comprises a load sensing means for measuring a load originating from the elongated portion.
  • the load sensing means is preferably integrated into the unit. If for instance the elongated member is holding a kite of a tidal water power plant, it may be good to get an indication of the loads emanating from the kite. If the loads are too high or even too low that may be an indication of that something is not correct with the kite.
  • a temperature sensing means is integrated into the unit. Temperature may for instance be measured to get an indication of the condition of the unit. The temperature value may be sent to a computer means that calculates a value indicative of the condition of the unit.
  • the submerged unit further comprises a bellow surrounding at least parts of the housing.
  • the bellow may be made by e.g. rubber or any other flexible material.
  • the elongated portion is rotatably connected to the connecting means.
  • the elongated portion such as a wire, may need to rotate.
  • a motor is configured to be able to rotate the elongated portion. The motor is preferably integrated into the submerged unit and sealed off from the surrounding environment.
  • the housing presents an elongated crevice along a part of the circumference of the housing for permitting a rotational relative movement between the first and second part.
  • the object is achieved by a device for locking a submerged unit to a foundation, wherein the submerged unit is meant to secure an elongated portion such as a wire to the foundation.
  • the device comprises a locking means meant to be able to be inserted into the foundation, wherein the locking means presents elongated locking portions.
  • the device comprises an actuator which comprises a screw and nut arrangement and a motor for enabling a relative rotational motion of the screw and nut such that a translational movement is accomplished.
  • the device comprises a chamber for accommodating a fluid, wherein the translational movement is arranged to increase and decrease the volume of the chamber to thereby transfer a hydraulic force, wherein the hydraulic force is meant to lock and unlock the locking means to/from the foundation.
  • the actuation of the nut and screw may for instance be accomplished by providing electrical energy generated from the tidal water plant.
  • the energy may for instance be stored in a battery.
  • Figure 1 is a cross sectional schematic view of an embodiment of the invention.
  • Figure 2 is showing an embodiment of a submerged unit according to the invention.
  • Figure 3 discloses a submerged unit according to the invention which is anchoring a tidal water power plant kite.
  • Figure 4 discloses a submerged unit according to the invention which is anchoring a tidal water power plant kite and which further presents a bellow.
  • Figure 5 shows a schematic cross sectional view of a device according to the second aspect of the invention.
  • Figure 6 shows a part of an embodiment of a device according to the second aspect of the invention.
  • Submerged unit 2 First hollow part
  • Figure 1 discloses a cross sectional schematic view of a submerged unit 1 according to the invention.
  • the unit 1 comprises a first hollow part 1 and a second part 2.
  • the first part presents an inner spherical surface 21 and the second part presents an outer spherical surface 31.
  • the two surfaces 21 and 31 essentially match each other so that a relative rotational movement can be accomplished around a pivot point 4.
  • the space between the two surfaces 21 and 31 is exaggerated in this figure.
  • the space may for instance contain a lubricant such as oil for facilitating the sliding motion between the first and second part 21 and 31.
  • the surfaces 21 and 31 may also be made of a material that is suitable for sliding motion. Such material could for instance be steel or a polymer.
  • a preferable material would be a material that is able to accommodate a lubricant, such as a polymer that presents lubricant holes or pores.
  • rolling elements may be interposed between the two surfaces 21 and 31 for accomplishing the relative rotation.
  • the unit comprises a through hole 7 that starts close to a connecting means 5 in the top of the unit 1.
  • the connecting means 5 is configured to connect to an elongated portion 100, such as a wire.
  • the connecting means 5 is located on the first part 2 and will rotate with the first part 2. However, the connecting means 5 could likewise be connected to the second part 3 and rotate with the second part 3. Furthermore, the top of the connecting means 5 is rotatable with the wire 100.
  • An electrical cable (not shown) may be located in the through hole 7.
  • the electrical cable may for instance transfer electrical energy that has been generated in a turbine and generator arrangement in tidal water power plant kite.
  • a slip ring (not shown) for transferring electrical energy.
  • the unit 1 presents a retractable elastic means 8, which in this illustration is a coil spring.
  • the spring 8 is meant to strive to hold the elongated portion 100 in an upright position.
  • the wire 100 is connected to a tidal water power plant kite, there may be a need to hold the kite in an upright position when the kite is not in operation. For instance, if repair or service work is to be done on the kite it is preferable if the kite is in an upright position close to the surface of the sea.
  • the unit 1 may further comprise sensors for sensing an angular position of the unit 1 .
  • the sensors may for instance be integrated in bearings (not shown) in the unit 1 .
  • the design of the unit 1 leads to a very robust and reliable construction, which is of high importance for sub sea applications.
  • FIG. 2 shows a submerged unit 1 according to the invention.
  • a housing 6 is seen, which encloses the first and second part 2 and 3 from the surrounding environment, i.e. the sea.
  • the housing 6 is divided in two parts which are joined together.
  • a wire 100 is also seen which is connected to the unit 1 via a connecting means.
  • the connecting means 5 may be able to rotate.
  • the connecting means may contain an electrical motor for rotating the wire 100.
  • a crevice 10 on the housing 6 is seen. The crevice 10 allows the unit 1 to rotate around the horizontal axis in the figure.
  • Figure 3 discloses a submerged unit 1 according to the invention which is anchoring a tidal water power plant kite 120.
  • the kite 120 is connected to the submerged unit 1 via an elongated portion 100, such as a wire.
  • the submerged unit 1 is in turn connected to the ground via a foundation 1 10.
  • the foundation may for instance be of concrete.
  • Figure 4 discloses a submerged unit 1 according to the invention which is anchoring a tidal water power plant kite 120.
  • the kite 120 is connected to the submerged unit 1 via an elongated portion 100, such as a wire.
  • the submerged unit 1 is in turn connected to the ground via a foundation 110.
  • the foundation may for instance be of concrete.
  • the unit comprises a bellow 9 enclosing at least parts of the unit 1 .
  • the bellow 9 increases the robustness and reliability of the unit 1 .
  • FIG. 5 shows an embodiment of a device 200 according to the second aspect of the invention.
  • the device 200 is meant to for lock a submerged unit 1 to a foundation 1 10, wherein the submerged unit 1 is meant to secure an elongated portion (not shown) such as a wire to the foundation 110.
  • the submerged unit 1 does not necessarily need to be a unit 1 as disclosed in the first aspect of the invention.
  • the device 200 comprises a locking means 201 meant to be able to be inserted into the foundation 1 10.
  • the foundation 1 10 is in a cross sectional view in this figure.
  • the locking means 201 presents elongated locking portions 202.
  • the locking portions 202 can move in and out from the locking means 201 .
  • the device 200 comprises an actuator which comprises a screw 203 and nut 204 arrangement and a motor 205 for enabling a relative rotational motion of the screw 203 and nut 204 such that a translational movement is accomplished.
  • the device 200 comprises a chamber 206 for accommodating a fluid, wherein the translational movement is arranged to increase and decrease the volume of the chamber 206 to thereby transfer a hydraulic force, wherein the hydraulic force is meant to lock and unlock the locking means 201 to/from the foundation.
  • the nut 204 will thus function as a piston in a hydraulic system. It will be an electromechanical system combined with a hydraulic system. This configuration is very robust and reliable.
  • the locking portions 202 are meant to be inserted into holes in the foundation 10.
  • the actuator may be integrated into the locking means 201. It may also be located outside the locking means 201. Furthermore, the foundation 1 10 may present a recess (not shown) on the top of the foundation 1 10 where the actuator can be located.
  • the motor 205 may be driven by electrical energy created in the tidal power plant.
  • a battery may also be connected to the device 200 to power the motor 205.
  • a spring 207 is located in the actuator. The spring 207 is a safety spring that will assure that the locking means 201 will not be
  • the motor 205 may be able to measure a position of the nut in the chamber 206 to thereby get an indication of the position of the locking portions 202.
  • sensing means may be located in other locations to measure the position of the locking portions 202. For instance, the sensing means may be located close to the locking portions 202 or it may be located in or close to the chamber 206.
  • Figure 6 shows a part of an embodiment of a device 200 according to the invention.
  • the device 200 further comprises elongated mounting and
  • the portions 208 may be pipes made of a polymer, such as rubber.
  • the pipes 208 are connected to the unit 1 by positioning portions 209, which in this illustration are ring-formed members into which the pipes 208 are located. Further, the pipes 208 are connected to the foundation 1 10 in a position such that the locking means 201 of the unit 1 will fit correctly into the foundation 1 10.
  • the pipes 208 are used to locate and correctly position the unit 1 to the foundation 110.
  • the pipes 208 may fall down to the bottom of the sea.
  • the portions 208 may be made of a polymeric material, such as rubber, the weakness of the pipes 208 will lead to that the pipes 208 may fall down.
  • the pipes 208 comprise weights (not shown) in the top region of the pipes 208 to thereby facilitate that the pipes 208 descend to the bottom.
  • the pipes 208 can be hollow and be able to lead a pressurized fluid to the foundation 1 10. This can for instance be advantageous if there is a need to clean the part of the foundation 1 10 where the unit 1 is meant to be installed. This will thus facilitate mounting of the unit 1 .
  • two elongated mounting and dismounting portions 208 are shown, but it can of course be more than two if considered needed.

Abstract

L'invention concerne une unité immergée (1) permettant de fixer une partie allongée (100) telle qu'un fil métallique à une fondation (110). L'unité comprend un premier élément creux (2) présentant une surface sphérique (21) interne, un deuxième élément (3) présentant une surface sphérique (31) externe, la surface sphérique (31) du deuxième élément (3) coïncidant sensiblement à la surface sphérique (21) du premier élément (1). Le deuxième élément (3) est logé dans le premier élément creux (2) de manière à permettre une rotation relative entre le premier et le deuxième élément (2, 3) autour d'un point pivot (4). Le premier ou le deuxième élément (2, 3) présente également un moyen de connexion (5) destiné à être relié à la partie allongée (100). Un boîtier (6) entoure au moins partiellement le premier élément (2) pour enfermer hermétiquement le premier et le deuxième élément (2, 3) vis-à-vis de l'environnement immédiat. En outre, l'invention concerne un dispositif (200) permettant de verrouiller une unité immergée (1) à une fondation (110).
PCT/SE2013/000044 2012-04-16 2013-04-04 Unité immergée pour fixer de manière pivotante une partie allongée à une fondation WO2013158006A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13778737.0A EP2839174A4 (fr) 2012-04-16 2013-04-04 Unité immergée pour fixer de manière pivotante une partie allongée à une fondation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1200228 2012-04-16
SE1200228-3 2012-04-16

Publications (1)

Publication Number Publication Date
WO2013158006A1 true WO2013158006A1 (fr) 2013-10-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2013/000044 WO2013158006A1 (fr) 2012-04-16 2013-04-04 Unité immergée pour fixer de manière pivotante une partie allongée à une fondation

Country Status (2)

Country Link
EP (1) EP2839174A4 (fr)
WO (1) WO2013158006A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016042110A1 (fr) * 2014-09-18 2016-03-24 Subsea Riser Products Limited Ensemble palier pour un élément chargé de façon axiale
EP3084211A4 (fr) * 2013-12-20 2017-08-16 X Development LLC Système et appareil pour gestion de câble

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2010365A (en) * 1977-12-14 1979-06-27 Bilfinger Berger Bau Spherical joints for connecting under-water foundations to platform-supporting towers
US4249084A (en) * 1975-10-08 1981-02-03 Villanueva Juan T Scheme for harnessing hydroundulatory power
US4455108A (en) * 1981-02-10 1984-06-19 M.A.N. Maschinenfabrik Augsburg-Nurnberg Aktiengesellschaft Anchoring system for a sea station supported on floating bodies
US4842308A (en) * 1988-06-23 1989-06-27 Australux North America Limited Rotation limiting ball-joint conduit apparatus
WO2000039496A1 (fr) * 1998-12-28 2000-07-06 Hitec Marine As Joint spherique isole
US7405557B2 (en) * 2003-08-22 2008-07-29 Zf Friedrichshafen Ag Ball-and-socket joint with an angle sensor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005027826B3 (de) * 2005-06-15 2007-01-18 Zf Friedrichshafen Ag Kugelgelenk mit Sensoreinrichtung und Verfahren zur Verschleißmessung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4249084A (en) * 1975-10-08 1981-02-03 Villanueva Juan T Scheme for harnessing hydroundulatory power
GB2010365A (en) * 1977-12-14 1979-06-27 Bilfinger Berger Bau Spherical joints for connecting under-water foundations to platform-supporting towers
US4455108A (en) * 1981-02-10 1984-06-19 M.A.N. Maschinenfabrik Augsburg-Nurnberg Aktiengesellschaft Anchoring system for a sea station supported on floating bodies
US4842308A (en) * 1988-06-23 1989-06-27 Australux North America Limited Rotation limiting ball-joint conduit apparatus
WO2000039496A1 (fr) * 1998-12-28 2000-07-06 Hitec Marine As Joint spherique isole
US7405557B2 (en) * 2003-08-22 2008-07-29 Zf Friedrichshafen Ag Ball-and-socket joint with an angle sensor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2839174A4 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3084211A4 (fr) * 2013-12-20 2017-08-16 X Development LLC Système et appareil pour gestion de câble
WO2016042110A1 (fr) * 2014-09-18 2016-03-24 Subsea Riser Products Limited Ensemble palier pour un élément chargé de façon axiale
GB2545377A (en) * 2014-09-18 2017-06-14 Subsea Riser Products Ltd Bearing assembly for an axially loaded member

Also Published As

Publication number Publication date
EP2839174A1 (fr) 2015-02-25
EP2839174A4 (fr) 2016-05-25

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