• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A conversion system that converts linear motion from movement of sea water into rotating motion comprising of a plurality of linked bodies (1), a plurality of bearing constellations (2) where each bearing constellation connects two linked bodies and thereby a linked body chain (3) is formed, and a rotating body (4) around which all or a part of the linked body chain is wound. The conversion system can be used for conversion of energy from sea waves, for desalination of sea water or for mooring systems.(Fig 1).
    公开号:SE1630013A1
    申请号:SE1630013
    申请日:2016-01-26
    公开日:2017-07-27
    发明作者:Hagnestål Anders
    申请人:Hagnestål Anders；
    IPC主号:
    专利说明:

    A linked body system for convertinq Iinear motion frommovements of sea water to rotatinq motion TECHNICAL FIELD OF THE INVENTION AND BACKGROUNDART The present invention relates to a linked body system and meth-od which is used to convert Iinear motion from movements ofsea water to rotating motion, where power is extracted from therotating motion.
    “Sea water” is to be interpreted as water present outdoors in anytype of Constellation, such as for example in oceans, lakes, riv-ers and even dams. The movement from which kinetic energy isconverted to other forms of energy, primarily to but not restrict-ed to electric energy may be caused by waves on the surface ofsaid water or water currents of different types within such seawater constellations. However, the present invention is particu-larly directed to power conversion from power of waves of seawater, which is the reason for hereinafter mainly describing theinvention for that application without restricting it thereto. Suchwave power converters can have many different forms. The pre-sent invention is particularly directed towards point absorbers,but is not restricted thereto. Point absorbers have a buoy that iseither on the surface of the water or some meters below the sur-face, and energy is extracted from the sea waves when thisbuoy moves.
    Characterizing for wave power is that it is delivered with verylow speeds and large forces compared to other power sources.Furthermore, there is a very large difference between the aver-age forces on the wave power unit and the maximum forces thatcould arise during storms. Characterizing for wave power is alsothat there is a large variation of the stroke length of the motionfrom waves where the largest stroke lengths occur at extremewaves during storms when the largest available forces occur.
    A power take-off system is a system that converts kinetic energyto other energy forms such as but not restricted to electric ener-gy. The heaving movement of point absorber buoys is linearwhich requires either a linear power take-off unit or a conversionsystem for linear movement to another movement form, typicallybut not restricted to rotating motion. Linear power take-off sys-tems suffer from short stroke |engths since a large stroke lengthwould give a very large power take-off device which is longerthan 2 times the stroke length if the power take-off device is tobe sealed from the sea water surrounding the wave power unit.The linear seal system would also be at least as long as thestroke length, so that the total length of the power take-off sys-tem including the seal would be at least 3 times as long as thestroke length. Such a long device will be expensive and will alsobe difficult to stabilize mechanically. The limited stroke length ofsuch linear power take-off systems restrict the motion in largewaves and cause very large forces on the structure which maycause the wave power unit to break in storms or requires thewave power unit to be very strongly dimensioned for mechanicalforces which makes the wave power unit expensive. Such linearpower take-off units also need linear seals which may havemaintenance issues, especially in sea water, and linear bearingsystems which are expensive.
    Winch-like constructions for wave power units, which comprisesa force transmitting object that is wound up on a rotating body,is well known. Said force transmitting object has been suggest-ed as a rope or wire. This works well for small prototypes wherethe ropes or wires are thin and the radius of said rotating bodyis large compared to the radius of the rope. For full-scale appli-cations, the minimum allowed bending radius for the rope orwire becomes violated if the radius of said rotating body is smallor moderate-sized. This will cause fatigue in the rope or wireand will cause the rope or wire to break. lf the radius of said ro- tating body is large, the problem can be avoided but the torquetransmitted to the power take-off unit will be considerably larger,and thereby the power take-off unit will be more expensive.
    Said force transmitting object has also been suggested as a flatrope or an array of thin ropes or wires arranged in a flat rope-like manner. Flat ropes do not suffer from fatigue from bendingin the same way as round ropes. Flat ropes are however sensi-tive to twisting and probably need a guiding system duringwinching.
    Said force transmitting object has also been suggested as achain. Chains however suffer from wear between the links andwill have a short mean time between failures. This introducesfrequent maintenance operations which are expensive andsometimes hard to schedule due to weather conditions.
    BRIEF DESCRIPTION OF DRAWINGSWith reference to the appended drawings, below follows a spe-cific description of embodiments of the invention cited as exam- ples. ln the drawings: Fig1 is a simplified perspective view illustrating vitalparts of a conversion system from linear to rotat-ing motion according to a first embodiment of theinvenflon, Fig 2 is a more detailed view of the conversion system shown in Fig 1, Fig 3 is a perspective view of the linked body chainshown in Fig 1, Fig 4 is a perspective view of a typical knuckle joint, Fig 5 is a perspective view of a typical universal joint,and Fig 6 is a perspective view and a cross section view of a twisting joint.
    DETAILED DESCRIPTION OF PREFERRED E|/|BOD|/IENTSOF THE INVENTION The present invention relates to a conversion systern from linearmotion to rotating motion by using a winch-like construction. Thesystern comprises a rotating body attached to a rotating axis andone force transmitting object that is attached to and rolled up onsaid rotating body and is in the other end attached to anotherobject that is in relative motion to said rotating body. lf said ro-tating body is located in the buoy, said force transmitting objectis typically connected to the sea floor, but is not restricted there-to. lf said rotating body is attached to the sea floor via bearings,said force transmitting object is typically connected to a buoybut is not restricted thereto. Such conversion systems from line-ar to rotating motion can have long stroke lengths since theforce transmitting object can be rolled up many turns on said ro-tating body. Thereby, the stroke length of the wave power unitcan be made longer than the maximum stroke length of the mo-tion from the waves which limits the maximum forces on thewave power unit to the damping force of the power take-off unitplus the inertial forces of said rotating body and said powertake-off unit which can be made small. This force is typically atleast one order of magnitude smaller than the force that wouldbe experienced by a unit with limited stroke length in an extremewave in a storm. Further, said conversion system from linear to rotating motion can be located outside the power take-off unitwhich then only needs rotating seals to prevent sea water to en-ter the power take-off unit and can have standard rotating bear-ings. Rotating seals and rotating bearings are less expensiveand are expected to have longer mean time between failuresthan linear seals and linear bearings. Further, the height of thepower take-off unit is not related to the stroke length for a wavepower unit using said conversion systern from linear to rotatingmotion and the power take-off systern can then be made com-pact although the stroke length is large.
    The present invention relates to a durable solution for said forcetransmitting object where a multitude of linked bodies are con-nected with bearings to form a linked body chain. Such a struc-ture can be dimensioned to be both strong and durable. The ini-tial cost of such a solution to said force transmitting object ishigher than for ropes and chains, but the maintenance costs areexpected to be considerably lower and the overall cost is ex-pected to be lower.
    One object of the present invention is to provide a compact du-rable conversion from linear motion to rotating motion for appli-cations where kinetic energy from sea waves is transformed intoother forms of energy, typically but not restricted to electric en-ergy, for desalination of sea water or for mooring systems forobjects in sea water, being improved in at least some aspectwith respect to such conversion systems already known.
    This object is according to the invention obtained by providing aconversion system according to appended claim 1.
    By constructing a linked body chain from linked bodies and join-ing them with bearing constellations, a very durable chain-likestructure can be achieved. Said linked body chain can then bewound on a winch-like rotating body, to give a very durablewinch that can be used to transform the linear motion from mo-tion of sea water to rotating motion. Thereby, maintenance costs at sea can be kept to a minimum for such systems. This inven-tion enables the use of compact wave power plants with a winchand a rotating power take-off system, which may be but is notlimited to an electric generator. Thereby, the stroke length of thewave power unit will only be limited by the length of the linkedbody chain and possibly the pretension system. The length ofthe linked body chain will not largely affect the size of the wavepower unit. With this characteristic, the stroke length can bemade longer than the longest stroke length by any predictedwave, and the movement will never be hindered by end stops.Thereby, the maximum forces on the wave power unit becomeseveral times smaller, which lowers the cost of the wave powerunit significantly and increases its survivability.
    A conversion system that converts linear motion from the motionof sea water to rotating motion according to a first embodimentof the invention is schematically illustrated in a perspective viewin Fig 1, and in a more detailed view in Fig 2. lt is shown howlinked bodies 1 are connected with bearing constellations 2 toform a linked body chain 3. One end of said linked body chain 3is wound up on a rotating body 4. ln the other end said linkedbody chain 3 is connected to a first object 5 that said rotatingbody 4 is in relative motion to when said conversion systemconverts movement of sea water to rotating motion. Optionallysaid first object can be connected to a second object, possiblyvia one or more other objects. Said first object can be the seafloor, a foundation or a buoy, or an object with a large surfacethat does not easily move in water. Said first object can also bea rope, chain, wire, rod or any other object which optionally canbe connected to said second object. Said first object is howevernot restricted thereto and can be any object that is in relativemovement to said rotating body 4 when said conversion systemconverts movement of sea water to rotating motion, even rocksat the sea floor.
    The length of said linked bodies will affect said conversion sys-tem from linear to rotating motion. lt is cheaper to have fewerbearings and longer linked bodies in said linked body chain.However, for a certain length of said linked body chain and acertain radius of said rotating body, fewer linked bodies giverise to larger torque ripple, which is usually undesirable. lf aconstant force is applied in a free end of said linked body chainalong said linked body chain so that said linked body chain ex-periences a tension force, there will be a torque around the rota-tion axis of said rotating body. This torque will approximatelyfluctuate between the minimum torque Tkmin and the maximumtorque Tkmin/cos(360/(2n)), where n>2, the angle to the cosinefunction is given in degrees, n is the number of linked bodiesthat is required to wind said linked body chain one turn aroundsaid rotating body and said linked bodies are assumed to belong-thin. Normally, n>2 since n=2 allows situations where saidtorque is zero but the invention is not restricted thereto. Fewerlinked bodies also increases the angle that each said bearingconstellation must turn when said linked body chain is wound upon said rotating body, and said angle in degrees can be calcu-lated as 360/n. The wear on each bearing constellation will in-crease if said angle is increased, which will shorten the life timeof said linked body chain. ln Fig 1, a possible position for seals 6 is schematically illus-trated, but the invention is not restricted to these positions. Thefunction of the seal is to prevent sea water to pass from one firstside of the seal to another second side of the seal. Typically,said first side of the seal is in contact with sea water and saidsecond side of the seal is not in contact with sea water so thatsaid second side is protected from sea water. A plurality of sealscan be combined in series so that each of those seals wouldhave the function of a seal, but any combination of such seals ishere referred to as one seal. lf seals are used, at least one sealprevents sea water to come in contact with at least one point onthe surface of said rotating body 4, or prevents sea water to come in contact with at least one point on the surface on anyother object that is connected to said rotating body. ln Fig 3, said linked body chain 3 is i|ustrated in more detail.Said linked bodies 1 are here cylinders but they can be of anyshape, and the invention is not limited to any specific shape ofsaid linked bodies 1. Said bearing constellations 2 are in Fig 3 atype of universal joints, but the invention is not limited to anyspecific bearing constellation or any specific bearings, and saidbearing constellations 2 may comprise one or more bearings. Auniversal joint is here defined as a combination of two or morebearings where each bearing grants movement for one firstlinked body 1 relative to an adjacent attached second linkedbody in at least one degree of freedom, and that any axis of ro-tation for at least two of said bearings in the bearing constella-tion that connects said first linked body to said second linkedbody are not parallel. A bearings axis of rotation is here definedas any axis around which one first part of the bearing can rotaterelative to another second part of the bearing. The rotation ofsaid first part of the bearing relative to said second part of thebearing is typically a fraction of a turn in this application, but isnot restricted thereto. The bearings can also be shaped like aball joint, in which a ball is partly enclosed by a surroundingholder body, so that more than half of the balls surface is en-closed by said holder body. One linked body would then be con-nected to the holder body, possibly via other bodies or bearings,and another linked body would be attached to the ball, possiblyvia other bodies or bearings. ln Fig 4, a knuckle joint is illustrat-ed, which is a robust solution to implement a joint with one de-gree of freedom, and bearings can be inserted inside the joint toreduce the wear substantially. Some movement in a second de-gree of freedom can be obtained if the joint is not tightly fitted.ln Fig 5, a universal joint is displayed in detail, which in thiscase comprises two combined knuckle joints orientated at anangle approximately 90° to each other. Universal joints canhowever be implemented in many ways, and the invention is not restricted to a specific type of universal joint. ln Fig 6, a twistingjoint is illustrated. A twisting joint can be arranged in any waysuch that a first twisting body 7 can be rotated re|ative to a sec-ond twisting body 8 around a twisting axis and movement of saidfirst twisting body re|ative to said second twisting body alongsaid twisting axis is restricted. The function of a twisting joint istypically to withstand a force along said twisting axis and allowrotation around said twisting axis.
    According to an embodiment of the invention, said rotating bodyis connected to a systern that converts the rotating kinetic ener-gy of said rotating body to electric energy, kinetic energy in flu-ids or gases or other forms of energy. Typically the rotating ki-netic energy of said rotating body would be converted to elec-tricity. This has the advantage of low losses and few conversionsteps. Hydraulic and pneumatic systems can also be connectedto said rotating body. They have typically lower conversion effi-ciency than directly connected electric energy converters, butare more light weight and can have lower initial costs.
    According to an embodiment of the invention, said rotating bodycan be connected to an electric generator. The electrical gener-ator can either be directly attached to the rotating body or beconnected by means of a connection that transmits the torquefrom the rotating body to the generator. By attaching the genera-tor directly to the rotating body, high energy conversion efficien-cy can be achieved and such an energy conversion system canhave low maintenance costs.
    According to an embodiment of the invention, said rotating bodycan be connected to a gearbox. The gearbox can be a mechani-cal gearbox, a magnetic gearbox where the torque is trans-formed using magnetic forces, or a hydraulic or pneumatic gear-box where gases or liquids are used to transform the torque. Agear box converts the low speed and high torque power intohigh speed and low torque power which allows for a considera- bly smaller and more efficient generator. Thereby, the initialcosts of a wave power unit can be lower by using a gearbox,although the total losses and the maintenance costs may behigher.
    According to an embodiment of the invention, said rotating bodycan be connected to a systern used for desalination of sea wa-ter. Since a wave power plant with a winch using said linkedbody chain can be cost effective, the systern is also suitable andcost effective for desalination of sea water. The need for desali-nation of sea water from renewable energy sources is expectedto increase in near future.
    According to an embodiment of the invention, said bearing is aplain bearing. Plain bearings are cheap and can withstand highstatic and slow dynamic loads, which makes them suitable forsaid bearing in said bearing constellation in said linked bodychain. Said plain bearing can have different geometrical forms.Said plain bearing is defined as an object comprising at leastone first plain bearing body that can move relative to at leastone second plain bearing body and where this movement is re-stricted in at least one degree of freedom by normal forces fromcontact surfaces between said first plain bearing body and saidsecond plain bearing body. Any first surface that can move rela-tive to another second surface of said bearing where said firstsurface is in contact with said second surface is a said contactsurface. ln contact is here used in a broad sense, and if the dis-tance between said first surface and said second surface is lessthan 1 cm the surfaces are considered to be in contact to eachother. Also, in contact refers to being in contact at any time dur-ing the lifetime of the linked body chain, not just when the bear-ings are new. Further, a plain bearing is here referred to as hav-ing at least one contact surface material at the contact surfacesthat is different from at least one other second material used insaid first plain bearing body or said second bearing body, andthat the thickness of said contact surface material in the direc- 11 tion of said normal force is at least 2.5 mm. Said contact surfacematerial is different from said second material if said contactsurface material has different wear properties than said secondmaterial. This is to distinguish plain bearings from ordinarychain links, where the chain may have a surface coating. Thereis a clear difference from having coated chains and having saidlinked body chain with distinct bearings. A coating would nor-mally cover the whole chain, while said contact surface materialis located in the bearings but not on the linked bodies.
    According to an embodiment of the invention, said linked bodycontains any material that is less resistant to wear than the ma-terials used at any said contact surface in any said plain bear-ing. How resistant a material is to wear is determined by thewear coefficient K, and a large K gives a material that is lessresistant to wear. Plain bearings are made of materials that arehighly resistant to wear, but from other points of view such ascost and tensile strength are unsuitable to make a whole chainof. Therefore, a combination of materials highly resistant to wearat said bearing contact surfaces and materials less resistant towear in said linked bodies is a good solution for a low costlinked body chain, far better than an ordinary chain. The plainbearings used could be of any type, and especially well suitedare plain bearings lubricated by sea water. Said plain bearingcan be of many different geometrical forms. Examples are twoconcentric cylinders, or two linked bodies of any shape that arelinked like a chain, but the invention is not restricted thereto.Plain bearings for typical applications is discarded and replacedafter wear of 0.1 - 0.3 mm, since they guide objects that requirea certain precision. This is not the case for said conversion sys-tem from linear to rotating motion where wear of several cm canbe allowed. Thereby, a very long life time can be achieved forsaid linked body chain.
    According to an embodiment of the invention, said bearing com-prises at least one rolling element. This includes ball bearings, 12 roller bearings and needle bearings, but is not limited thereto.With said rolling elements, the lifetime of the bearing becomeslonger which may be suitable for those links in the chain thatwould suffer mostly from wear. The cost of the bearings willhowever be higher than for plain bearings.
    According to an embodiment of the invention, said bearing is afluid bearing. A fluid bearing has contact surfaces similar to saidcontact surfaces in said plain bearing, but have a layer of fluidin between adjacent said bearing contact surfaces. Fluid bear-ings experience very little wear and have a low cost, which isvery suitable for said linked body chain. They typically howeverrequire a pump or similar to give the required fluid pressure atthese low speeds, which complicates the solution and increasesmaintenance costs. The invention is however not restricted tofluid bearings that require a pump.
    According to an embodiment of the invention, seals prevent seawater from entering said bearing. By using seals to prevent seawater from entering said bearing so that sea water will not bepresent at said bearing contact surfaces or said bearing rollingelements, other lubricants than sea water could be used in thebearings. This can both reduce corrosion and wear, and cantherefore be favorable. The seals are typically placed at thebearings themselves, like typical designs of sealed bearings.The invention is however not limited thereto.
    According to an embodiment of the invention, any of said bear-ings or said bearing constellations is arranged as a universaljoint, a pin joint, a knuckle joint, a ball joint or a twisting joint.These are several well-known solutions for implementing jointswith bearings, which are suitable for this application. The uni-versal joint gives high strength and full flexibility in all direc-tions. The ball joint is more compact than the universal joint,and gives flexibility in all directions but the maximum bendingangle is smaller. The pin joint and knuckle joint are cheap and 13 simple, and give full flexibility in one dimension. They musthowever be arranged with care to give a sufficiently flexiblelinked body chain in many applications and may require consid-erably shorter linked bodies. The invention is however not lim-ited to these bearing arrangements.
    According to an embodiment of the invention, said rotating bodyhas a threaded structure. Said threaded structure is used to dis-tribute said linked body chain evenly on said rotating body, sothat different turns of said linked body chain on said rotatingbody do not overlap or overlaps in an orderly manner. The ad-vantage of this is that said linked body chain is wound up onsaid linked body in an orderly manner. Said threaded structurecan be of any type that guides the linked body chain to a distri-bution on said rotating body when said linked body chain isrolled up on said rotating body.
    According to an embodiment of the invention, said rotating bodyhas a cross section shaped as a circle or a polygon. The axis ofrotation for the rotating body is normal to the plane in which saidcross section lies. There are advantages and drawbacks associ-ated with different cross section shapes. A circular cross sectionis fully symmetric, and said linked bodies can be wound up onsaid rotating body like a chain and do not need to be of a pre-cise length. This allows for extensive wear in said bearings be-fore maintenance is needed. However, the support for saidlinked bodies will be weaker since the contact surface of saidlinked bodies to said rotating body will be small and typically atthe center of said linked bodies which will give larger forces onsaid linked bodies. With a polygon cross section, the length ofthe linked bodies can be adjusted to the side length of the poly-gon. Thereby, said linked bodies can easily get good supportfrom said rotating body since said linked bodies will have a largecontact area to said rotating body. 14 According to an embodiment of the invention, said Conversionsystem is used as a mooring system for structures in sea water.I/|ooring systems are used to keep objects in place in sea water.Said conversion system is suitable for mooring systems wherethe location of the object needs to be more precise, and needs acontrol system. Said conversion system can then be used as adurable winch to connect to such a control system.
    According to an embodiment of the invention, said linked bodychain is connected to a rope, wire, chain or rod. The reason forthis is to lower the cost. lt is not necessary to have a linkedbody chain all the way to the point where it is firmly attached.This point may be the ocean floor, a buoy or something else towhich said conversion system is in relative motion. The linkedbody chain is only required on the part of said force transmittingobject which is wound up on said rotating body. Furthermore, itis only required on the part of said force transmitting object thatis wound up and off frequently, since only this part of said forcetransmitting object experience extensive wear. The rest of theforce transmitting object can therefore be a rope, wire, chain orsometimes a rod or something else that transmits the force in asuitable way.
    According to an embodiment of the invention, said rotating bodyis connected to a pretension system that produces a tensionforce in said linked body chain. This can in principle be accom-plished by running the power take-off system of a wave powerplant in reverse direction. However, it is preferable to have apassive system that always produces a tension in said linkedbody chain regardless of control systems and connections to thegrid and regardless of application, since said conversion sys-tems may suffer from huge forces if the entire linked body chainwould be wound off said rotating body, an event that would becomparable to having an end stop without damping if one end ofsaid linked body chain is connected firmly to said rotating bodyor comparable to having an end stop with damping if one end of said linked body chain is connected to said rotating body via adamper system such as but not restricted to an e|astic rope.
    According to an embodiment of the invention, one or severalseals prevent sea water to come in contact with at least onepoint on the surface of said rotating body or at least one pointon the surface of any other bodies attached to said rotatingbody. This is to prevent sea water to enter the system where theconversion to other energy forms is made and the bearings thatsupport the rotating body. Such systems and bearings may op-erate in sea water, but if proper seals are mounted to preventsea water from entering the system, standard components canbe used which will be more cost effective.
    The invention also relates to a plant for generating electric pow-er from kinetic energy of moving sea water provided with at leastone conversion system according to the invention. The ad-vantages and advantageous features of such a plant appearclearly from the above discussion of the different embodimentsof a conversion system according to the invention.
    The invention also relates to a method of converting kinetic en-ergy from movement of sea water to rotating kinetic energy us-ing said linked body chain which is wound up on said rotatingbody so that a linear movement of one or several said linkedbodies in said linked body chain gives rise to rotating motion insaid rotating body.
    Further advantages and advantageous features of the inventionappear from the description.
    The invention is of course not in any way restricted to the em-bodiments described above, but many possibilities to modifica-tions thereof will be apparent to a person with ordinary skill in 16 the art without departing from the scope of invention as definedin the appended claims.
    权利要求:
    Claims (17)
    [1] 1. _
    [2] Claims
    [3] 3. A Conversion system that converts linear motion frommovement of sea water into rotating motion comprising of atleast o a plurality of linked bodies (1), ø at least one bearing constellation (2) where said bearingconstellation connects two said linked bodies forming amechanical joint between the two said linked bodies,each said bearing constellation comprises at least onebearing, and a plurality of said linked bodies thereby isconnected forming a linked body chain (3), o a rotating body (4) around which at least a part of saidlinked body chain can be wound.
    [4] 4. A conversion system according to claim 1, characterized inthat said rotating body is connected to a system that con-verts the rotating kinetic energy into kinetic energy in fluidsor gases, electric energy or other forms of energy.
    [5] 5. A conversion system according to claim 1 or 2, character- ized in that said rotating body is connected to a system thatis used for desalination of sea water.
    [6] 6. A conversion system according to claim 1, 2 or 3, charac- terized in that said rotating body is connected to a gearbox.
    [7] 7. A conversion system according to claim 1, 2 or 3, charac- terized in that said rotating body is connected to an electricgenerator.
    [8] 8. A conversion system according to claim 1, 2, 3, 4 or 5,characterized in that said bearing is a plain bearing.
    [9] 9. A conversion system according to claim 6, characterized inthat said linked body contains any material that is less re-sistant to wear than the materials used at any contact sur-face in said plain bearing.
    [10] 10.
    [11] 11.
    [12] 12.
    [13] 13.
    [14] 14.
    [15] 15.
    [16] 16.
    [17] 17. A Conversion system according to c|aim 1, 2, 3, 4, 5, 6 or 7,characterized in that said bearing comprises at least onerolling element. A conversion system according to c|aim 1, 2, 3, 4 or 5,characterized in that said bearing is a fluid bearing. A conversion system according to c|aim 1, 2, 3, 4, 5, 6, 7, 8or 9, characterized in that it comprises at least one sealadapted to prevent sea water from entering said bearing. A conversion system according to c|aim 1, 2, 3, 4, 5, 6, 7, 8,9 or 10, characterized in that any of said bearings or saidbearing constellations is arranged as a universal joint, a pinjoint, a knuckle joint, a twisting joint or a ball joint. A conversion system according to c|aim 1, 2, 3, 4, 5, 6, 7, 8,9, 10 or 11, characterized in that said rotating body has athreaded structure which distributes said linked body chainon said rotating body when said linked body chain is woundup. A conversion system according to c|aim 1, 2, 3, 4, 5, 6, 7, 8,9, 10, 11 or 12, characterized in that said rotating body hasa cross section shaped as a circle or a polygon. A conversion system according to any of the precedingclaims, characterized in that said conversion system isused in a mooring system for structures in sea water. A conversion system according to any of the precedingclaims, characterized in that said linked body chain is at-tached to a rope, wire, chain or rod. A conversion system according to any of the precedingclaims, characterized in that said rotating body is connect-ed to a pretension system that produces a tension force insaid linked body chain. A conversion system according to any of the precedingclaims, characterized in that one or several seals preventsea water to come in contact with at least one point on thesurface of said rotating body or at least one point on thesurface of any other bodies attached to said rotating body.
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    同族专利:
    公开号 | 公开日
    SE540525C2|2018-09-25|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1630013A|SE540525C2|2016-01-26|2016-01-26|A linked body system for converting linear motion from movements of sea water to rotating motion|SE1630013A| SE540525C2|2016-01-26|2016-01-26|A linked body system for converting linear motion from movements of sea water to rotating motion|
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