WO2014097254A1 - Dispositif et procédé de mise en place d'un élément structural - Google Patents

Dispositif et procédé de mise en place d'un élément structural Download PDF

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Publication number
WO2014097254A1
WO2014097254A1 PCT/IB2013/061204 IB2013061204W WO2014097254A1 WO 2014097254 A1 WO2014097254 A1 WO 2014097254A1 IB 2013061204 W IB2013061204 W IB 2013061204W WO 2014097254 A1 WO2014097254 A1 WO 2014097254A1
Authority
WO
WIPO (PCT)
Prior art keywords
boom
lifting device
hoisting
coupling means
structural component
Prior art date
Application number
PCT/IB2013/061204
Other languages
English (en)
Inventor
Etiënne CLYMANS
Original Assignee
High Wind N.V.
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
Priority claimed from BE2012/0864A external-priority patent/BE1021593B1/nl
Application filed by High Wind N.V. filed Critical High Wind N.V.
Publication of WO2014097254A1 publication Critical patent/WO2014097254A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/108—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means for lifting parts of wind turbines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/185—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use erecting wind turbines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • B66C23/52—Floating cranes

Definitions

  • the invention relates to a device for placing a structural component.
  • the invention likewise relates to a method for placing such a structural component.
  • the invention relates particularly to a device and method for placing a rotor blade of a wind turbine.
  • the device and method according to the invention can expressly be used both on land (onshore) and at sea (offshore).
  • a typical example is a wind turbine comprising a gondola (or nacelle) which is placed on a mast and forms the housing for electromechanical equipment such as a power generator.
  • the nacelle is also provided with a hub on which a number of rotor blades are arranged. The rotor blades convert the kinetic energy of the wind into a rotating movement of the shaft of the nacelle, which is converted into electrical energy by the power generator.
  • the components are manipulated according to the prior art by a crane placed on a surface, and placed and mounted on an already available support structure for the structure or on an already placed part of the structure.
  • the support structure can for instance comprise a mast placed on a suitable foundation.
  • a wind turbine blade in particular has to be attached by means of bolt connections to a hub, this requiring a precise positioning of the wind turbine blade relative to a hub already installed on a mast.
  • An object of the present invention is to provide a device with which a structural component, in particular a rotor blade for a wind turbine, can be placed and mounted on land or at sea, this in a manner less susceptible to wind and more precisely than known in the prior art.
  • a device for placing a structural component, in particular a rotor blade of a wind turbine comprises according to the invention a lifting means provided on a surface in the form of a boom rotatable around a horizontal axis in a lifting plane, wherein the boom comprises a lifting device which is connected to the boom for displacement in the longitudinal direction of the boom, and wherein the lifting device is provided with a coupling means configured to couple the structural component to the lifting device.
  • the structural component can be positioned relative to a support structure or partially erected structure by suspending the component from the hoisting means by means of a hoisting cable and hoisting tackle and rotating the hoisting means about a vertical axis, by rotating the boom of the hoisting means up and downward in the lifting plane and/or by moving the hoisting tackle up and downward with the hoisting cable.
  • a positioning of the component which is substantially independent of wind is made possible by coupling the structural component at least temporarily to the lifting device.
  • a further advantage of the invented device is that it allows work to take place in highly unfavourable conditions, whereas the known device can only be deployed up to determined wind speeds.
  • the assembly time of a structure can hereby be significantly reduced.
  • the structural component is hoistable by connecting a hoisting cable of the hoisting means to a hoisting yoke, and the coupling means of the lifting device are configured to connect the hoisting yoke at least temporarily to the lifting device.
  • the use of a hoisting yoke is advantageous because it can be adapted to the structural component to be lifted.
  • the use of a hoisting yoke is particularly advantageous when taking up and lifting rotor blades for wind turbines. Rotor blades are generally vulnerable since they must by nature be light and for this reason are preferably manufactured from fibre- reinforced plastic.
  • the coupling means according to the invention are preferably connectable to a large number of types of hoisting yoke.
  • a device wherein the coupling means are displaceable parallel to the lifting plane from a position in the vicinity of the boom to a position further removed from the boom and/or vice versa, this preferably in a direction running
  • a structural component, or hoisting yoke with structural component, attached to the coupling means can in this way be displaced over relatively limited distances (in the order of several metres) from a position in the vicinity of the boom to a position further removed from the boom and/or vice versa. This enables an accurate positioning of the structural component, or hoisting yoke with structural component, relative to an assembly position, in which assembly position the structural component is mounted on the structure.
  • the lifting device comprises a movable carrier for the coupling means, which carrier is displaceable parallel to the lifting plane from a position in the vicinity of the boom to a position further removed from the boom and/or vice versa, preferably in a direction running perpendicularly of the longitudinal axis of the boom.
  • An embodiment according to the invention comprises a device wherein the coupling means are configured to connect the hoisting yoke rigidly to the lifting device.
  • the hoisting yoke and a structural component attached thereto
  • the device has the feature that the hoisting yoke is configured to lift an elongate structural component at an outer end thereof. During lifting such an elongate structural component, for instance a wind turbine blade, will then generally hang downward in a substantially vertical direction from the outer end where the hoisting yoke is attached.
  • any temporary, preferably rigid connection will suffice. It is thus possible for instance to apply a connection with catches.
  • the coupling means comprise a first part of a twist-lock connection to which can be coupled a hoisting yoke and/or a structural component provided with a second part of the twist-lock connection co-acting with the first part.
  • the second part of a twist-lock connection comprises for instance an opening arranged in the structural component or preferably in the hoisting yoke, while a first part comprises a body which can be received by the opening in a first rotational position and which can no longer be received in the opening in a second rotational position.
  • a twist-lock connection is brought about by moving the second part through the opening and subsequently rotating it around an axis running perpendicularly of the opening, whereby the first and second parts are coupled and the reverse movement is no longer possible without rotation.
  • a twist-lock connection is strong and easy to realize, but also easy to release again.
  • the movable carrier and/or the coupling means comprise guides for guiding the hoisting yoke to the coupling means.
  • the hoisting yoke and/or structural component does after all have to be coupled to the lifting device, and for this reason has to be carried in simple manner in the direction of the lifting device and/or the coupling means, even in strong wind conditions.
  • a particularly suitable embodiment has guides comprising wall parts which are attached rigidly to the movable carrier and/or to the coupling means and which extend outward at an oblique angle from the carrier and/or coupling means.
  • a catching funnel is thus as it were created for the hoisting yoke and/or structural component, wherein such a component is guided automatically to the coupling means once it has come into contact with a guide. This is because the wall parts lead to the lifting device and/or the coupling means.
  • the guides comprise wall parts which are mounted hingedly on the movable carrier and/or on the coupling means and which are movable around the hinge connection between a folded-open position, in which they extend outward at an oblique angle from the carrier and/or coupling means, and a closed position in which they lie against the carrier and/or coupling means.
  • the movable carrier can be displaced relative to the lifting device in that in an embodiment it comprises linear displacing means for displacing the movable carrier in a direction parallel to the lifting plane from a position in the vicinity of the boom to a position further removed from the boom and/or vice versa.
  • Suitable linear displacing means comprise for instance hydraulic cylinders connected at an outer end to the movable carrier and at another outer end to the lifting device.
  • the movable carrier can be displaced relative to the boom and/or the lifting device by imparting a movement to or otherwise retracting the hydraulic cylinders.
  • the lifting device is displaceable along the longitudinal axis of the boom by means of a displacing device.
  • the displacing device comprises first guide means provided on the lifting device and/or the movable carrier and second guide means provided on the boom which co-act with the first guide means.
  • the first guide means comprise pair of wheels and the second guide means a T- beam, wherein the pair of wheels encloses a flange of the T-beam.
  • a particularly advantageous embodiment of the device has the feature that the displacing device is configured so that the lifting device with the optional movable carrier follows the displacement of a hoisting tackle mounted on the hoisting means in the case that the hoisting tackle is raised or lowered and the structural component is coupled to the lifting device and the hoisting tackle.
  • the displacing device comprises a tensioning cable attached to the lifting device and operated by a constant tension winch so that the tension force in the tensioning cable remains substantially constant, preferably in a manner such that the lifting device and the movable carrier co-displace with the hoisting tackle while applying little vertical force.
  • the co-displacement is possible because the lifting device is also coupled via the coupling with the (hoisting yoke of the) structural component to the hoisting tackle.
  • Another embodiment provides a device, the lifting device of which comprises auxiliary devices, in particular a tugger winch with tag line.
  • auxiliary devices in particular a tugger winch with tag line.
  • tag line Using the tag line a lifted structural component can be engaged and kept under control, for instance in order to help prevent excessive forces on the lifting device and the coupling means.
  • the tag line is tightened or payed out by means of the available tugger winch.
  • the tag line is for instance guided along a cross beam connected to a frame of the lifting device by means of pulleys mounted on the cross beam.
  • the device according to the invention is particularly suitable for manipulating a rotor blade of a wind turbine and arranging such a rotor blade on the hub of a nacelle.
  • the device is particularly advantageous when a rotor blade is being lifted and mounted in a substantially vertical position on the hub of a wind turbine.
  • the invented device enables assembly of offshore wind turbines up to wind speeds of 12m/s and more, where with the known device the mast and nacelle can be assembled up to wind speeds of lOm/s, a complete rotor (a hub on which three blades are mounted) up to 9m/s, a nacelle with hub and two pre-mounted blades (the so-called bunny ear method) up to about 9m/s and individual rotor blades up to 8m/s.
  • the surface preferably comprises a vessel, and more preferably a jack-up platform.
  • the surface can optionally be formed by the ground or for instance by a bearing structure provided for the hoisting means.
  • the invention likewise relates to a method for placing a structural component, in particular a rotor blade of a wind turbine, on a support structure or partly erected structure.
  • the method comprises of providing a device according to any of the foregoing claims on a surface, taking up the structural component with the hoisting means, coupling the structural component to the lifting device using the coupling means, displacing the lifting device in the longitudinal direction of the boom into or into the vicinity of an assembly position, optionally displacing the coupling means parallel to the lifting plane from a position in the vicinity of the boom to a position further removed from the boom and/or vice versa, and coupling the structural component to the support structure.
  • the support structure can form a foundation for the structure, but can also be a partially erected structure, such as for instance a wind turbine mast, provided with nacelle and hub and optionally already provided with one or more rotor blades.
  • a structural component can be positioned accurately relative to and attached to the support structure.
  • the device conversely provides options for a method in which a structure is disassembled, particularly the components of a wind turbine.
  • a preferred method comprises of connecting a hoisting yoke rigidly to the lifting device via the coupling means.
  • the hoisting yoke is preferably configured to hoist an elongate structural component at an outer end thereof.
  • Another embodiment comprises a method in which the lifting device with movable carrier is displaced passively by means of a tensioning cable attached thereto with a substantially constant tension force along the longitudinal axis of the boom by lifting or lowering the attaching means.
  • the lifting device with the optional movable carrier here follows the displacement of a hoisting tackle mounted on the hoisting means when the hoisting tackle is raised or lowered and the structural component is coupled to the lifting device and the hoisting tackle.
  • a particularly suitable embodiment comprises the steps of:
  • the device and method according to the invention are particularly suitable for hoisting and mounting a wind turbine blade in a substantially vertical position on a hub of a wind turbine.
  • Fig. 1 is a schematic side view of an embodiment of the device according to the invention
  • Fig. 2A-2F are schematic side views of the embodiment of the device according to the invention shown in figure 1 in different modes;
  • FIG. 3A, 3B and 3C are schematic side views of an embodiment of a lifting device with movable carrier according to the invention in different modes.
  • FIG. 4A, 4B and 4C show respectively a schematic top view, side view and front view of an embodiment of a lifting device with movable carrier according to the invention.
  • Figure 1 shows a side view of a device 1 according to the invention.
  • the shown embodiment is configured for placing at sea of components of a wind turbine on a support structure in the form of a jacket 3 (see figures 2D-2F). It will be apparent that the invention is not limited to a support structure in the form of a jacket, and that any other foundation can be used.
  • the placing of a rotor blade 22 on the hub of a nacelle 21 already placed on a mast 2 will be illustrated below.
  • Device 1 comprises a hoisting means 5 in the form of a crane which is placed on a vessel 4 and a boom 6 of which is provided with a hoisting cable 7 on which an attaching means such as a hoisting tackle 8 is arranged and to which a rotor blade 22 component for lifting can be attached via a hoisting yoke.
  • Boom 6 and the (freely movable) hoisting cable 7 together form a lifting plane (which corresponds to the plane of the figure).
  • Boom 6 is connected for pivoting around a fixed horizontal shaft 6a to a hoisting means platfonn 50a, which is in turn rotatable around a platform foundation 50b about a rotation axis 51.
  • Boom 6 can be luffed in, i.e.
  • Vessel 4 comprises a jack-up offshore platform provided with anchor piles 40 which support a work deck 41.
  • Anchor piles 40 are movable in vertical direction to the seabed, and the height position of work deck 41 relative to the water level can be changed by displacing work deck 41 relative to piles 40 by means of (hydraulic) jacks or a gear rack-pinion drive system.
  • work deck 41 is provided with storage locations for the components to be lifted and positioned.
  • the vessel 4 is moored in the immediate vicinity of the support structure 3 available at sea, and in any case such that support structure 3 lies within reach of hoisting means 5 with boom 6 in luffed-out position.
  • boom 6 comprises a lifting device 10 which is provided with coupling means 310 with which the rotor blade 22 can be coupled to lifting device 10.
  • the lifting device 10 limits uncontrolled movements of rotor blade 22 relative to boom 6, at least at the position of the coupling to lifting device 10.
  • a rotor blade 22 is generally connected to hub 23 of wind turbine nacelle 21 with a number of bolt connections 24, wherein placing has take place very precisely.
  • the lifting device 10 comprises a movable carrier 30 for coupling means 310.
  • Carrier 30 can be displaced parallel to the lifting plane between a position A in the vicinity of the boom 6 and a position B further removed from the boom, and/or vice versa.
  • movable carrier 30 is made displaceable for this purpose in the lifting plane.
  • FIG. 10 An embodiment of a lifting device 10 is shown in more detail in figures 4A, 4B and 4C.
  • the shown lifting device 10 comprises a frame of mutually connected beams, at least two beams
  • the frame is further reinforced by two inclining beams (102a, 102b) and two inclining beams (102a', 102b').
  • the length of the beams (101a, 101b) is such that they extend further than the freely suspended hoisting tackle 8.
  • the two beams (101 a, 101 b) preferably extend parallel to lifting plane 31 over a perpendicular distance 62 from boom 6 of a maximum of twice the boom width 63 in order to provide sufficient stiffness.
  • lifting device 10 is further provided with a movable carrier 30 provided with the coupling means 310.
  • Carrier 30 is configured to displace a (hoisting yoke 300 of the) rotor blade 22 coupled thereto in the lifting plane 31 between a position A in the vicinity of boom 6 and a position B further removed from boom 6.
  • Movable carrier 30 likewise comprises a frame of mutually connected beams or wall parts.
  • the wall parts comprise two side wall parts (301a, 301b), which extend parallel to the lifting plane 31 from boom 6 in the direction of hoisting tackle 8, and a rear wall part 303 facing toward boom 6.
  • Movable carrier 30 is displaceable over beams (101a, 101b) of lifting device 10 relative to lifting device 10 by means of linear displacing means, for instance in the form of hydraulic piston cylinders (33a, 33b) or by means of a chain drive.
  • Piston cylinders (33a, 33b) are connected via connecting plates (34a, 34b) to the frame of the movable carrier, more specifically to wall parts (301a, 301b).
  • Movable carrier 30 with a (hoisting yoke of a) rotor blade 22 coupled thereto can thus be displaced to a position A in the vicinity of boom 6 by retracting the hydraulic piston cylinders (33a, 33b).
  • Movable carrier 30 with the (hoisting yoke of a) rotor blade 22 coupled thereto can be carried to a position B further removed from boom 6 by extending the hydraulic piston cylinders (33a, 33b).
  • Lifting device 10 provided with movable carrier 30 is connected to boom 6 for displacement along longitudinal axis 60 by means of a displacing device (108, 109, tensioning cable, hoisting sheave and winch).
  • Lifting device 10 and boom 6 are provided for this purpose with first and second co-acting guide means (108, 109) which, together with a tensioning cable, hoisting sheave and winch (not shown) mounted on lifting device 10, form the displacing device.
  • the first guide means comprise sets of wheels 108 arranged on the base frame ( 103, 104) and the second guide means comprise T-beams 109 connected to the side of boom 6 facing toward lifting device 10.
  • Each pair of wheels 108 encloses the flange of a corresponding T-beam 109, wherein wheels of a set of wheels 108 are situated on either side of the flange and roll thereover.
  • Each set of wheels is particularly provided with a wheel which runs on flange 109' of the T-profile 109 provided on the boom box girder for the purpose of absorbing pressure forces and two running wheels running on the other side against flange 109' of T-profile 109 for the purpose of absorbing tension forces.
  • transverse rollers running on the end surface of flange 109' of T-profi le 109 in order to hold l ifting device 10 on the rails in transverse direction.
  • Cylinders (33a, 33b) are connected by means of fixed connections 308 to beam 103a, on which beam they set themselves off.
  • the tensioning cable (not shown) attached to lifting device 0 is preferably operated by a constant tension winch (not shown) so that the tension force in the tensioning cable remains substantially constant and is kept at a generally relatively low value in the situation where the lifting device is active and is suspended while applying little force from hoisting tackle 8 via movable carrier 30 which is connected rigidly to hoisting yoke 300 with coupling means 310.
  • the constant tension winch is situated for instance on boom 6, for instance on a transverse box girder in the area surrounding the hinge construction in the vicinity of hinge 6a, roughly in the centre of the boom.
  • the hoisting sheave for the lifting device is preferably situated at the upper outer end of boom 6.
  • Lifting device 10 can be provided if desired with auxiliary devices.
  • such an auxiliary device comprises among other parts a tugger winch 1 10 from which runs a tag line 1 1 1 which can be connected to the rotor blade 22 connected to hoisting tackle 8. The component can be held under control by lengthening or shortening tag line 11 1 using winch 1 10.
  • Tag line 1 1 1 can be connected to base frame (103, 104) in simple manner via a suspension frame (201, 202) which is connected to base frame (103, 104) and constructed from vertical beams 201 and a cross beam 202, which is likewise provided with sets of wheels 108 co-acting with T-beam 109.
  • Cross beam 202 has sufficient length to suspend pulleys 203 from the outer ends such that the guide cables can engage roughly at a right angle on the component for lifting. This results in the most efficient guiding of the tugger system.
  • power supply means such as batteries, motors, pumps and the like are present for the purpose of operating the different components of lifting device 10, such as for instance the tugger winches and the hydraulic cylinders. It is also possible to place these provisions wholly or partially on crane structure 5, wherein the hydraulic hoses, electrical and mechanical cables and the like required for the purpose of actuating the components are run along the boom to lifting device 10.
  • the power supply means are however preferably provided on lifting device 10 itself, and the required energy is carried via a so-called umbilical hoisting cable to lifting device 10.
  • An umbilical hoisting cable comprises a steel cable, the core of which comprises not a strand but for instance an electrical power supply cable. Energy can in this way be carried easily to lifting device 10 via for instance slide rings in the hoisting winch drum. The operation of the diverse functions is performed most easily using radio remote control.
  • FIGS 2A-2F illustrate the placing of a rotor blade 22 on the hub of a wind turbine nacelle 21 using an embodiment of the method according to the invention.
  • the method comprises of providing a device 1 as described in detail above on the jack-up platform 4, taking up rotor blade 22 with hoisting means 5, coupling hoisting yoke 300 of rotor blade 22 to lifting device 10 using coupling means 310 and displacing lifting device 10 in the longitudinal direction 60 of boom 6 into or into the vicinity of an assembly position.
  • Rotor blade 22 is subsequently coupled to the hub of nacelle 21 by means of for instance bolt connections.
  • a hoisting yoke 300 is first mounted on rotor blade 22 at the position of the attachment to the hub. Hoisting tackle 8 is then attached to hoisting yoke 300 and rotor blade 22 is brought into a substantially vertical position by pulling up hoisting tackle 8 with hoisting cable 7 and rotating the boom 6 round axis 51 until rotor blade 22 is located above the deck of jack-up platform 4 (figure 1 A). Hoisting yoke 300 is attached by means of slings 301 to hoisting tackle 8.
  • boom 6 is then tilted upward until it runs so steeply that hoisting yoke 300 comes to lie within reach of lifting device 10, after which lifting device 10 is displaced along the longitudinal axis 60 of boom 6 from the lower position shown in figure 2B to the higher position shown in figure 2B, in which latter position the lifting device 10 can be coupled to hoisting yoke 300 (figure 2B).
  • Hoisting yoke 300 is subsequently secured with for instance the twist-lock coupling means 310 to carrier 30 of lifting device 10, wherein a relatively rigid connection is obtained.
  • the hoisting winch of lifting device 10 is set into constant tension operation.
  • the lifting device 10 therefore continues to follow hoisting tackle 8 passively (figure 2C).
  • Boom 6 is then pivoted around the horizontal shaft 6a until an angle of about 10° is obtained between longitudinal axis 60 of boom 6 and the vertical direction.
  • This boom angle of about 10° is the angle at which the fastening bolts 24 of rotor blade 22 to hub 23 run precisely parallel to a central axis of corresponding fastening holes in hub 23.
  • the boom angle is made substantially equal to the angle the assembly direction of the blade root bolts 24 forms with the vertical.
  • the movement of lifting device 10 then ensures that blade root bolts 24 are brought into line with the fastening holes in hub 23. It will be apparent that the optimum boom angle depends on the type of wind turbine. The optimum boom angle of 10% applies for instance for an Alstom-6MW turbine.
  • Such a turbine has a tilt angle of 6° (the tilt angle is the angle which the axis of nacelle 21 makes with the horizontal direction) and a cone angle of 4° (the cone angle is the angle which the rotor blades 22 make relative to a direction running perpendicularly of the axis of nacelle 21 ).
  • the blade root bolts thus have in this specific case an angle of 10° relative to a vertical direction. These angle values may differ in other products.
  • Boom 6 is rotated if desired around the vertical axis 51 until the root of rotor blade 22 is in the vicinity of the assembly position with hub 23.
  • Rotor blade 22 is subsequently positioned precisely under the hub by means of displacing movable carrier 30 parallel to lifting plane 31 between a position in the vicinity of boom 6 and a position further removed from boom 6 (figure 2E). Finally, rotor blade 22 is lifted carefully upward parallel to the longitudinal direction 60 of boom 6, wherein movable carrier 30 is further displaced if desired until the bolt holes of rotor blade 22 and the hub are aligned and the upper side of rotor blade 22 is located against the hub. Rotor blade 22 is at that moment connected to the hub by arranging the bolt connections.
  • an Alstom-6MW turbine 128 bolts of a diameter of 30 mm and a pitch circle of 3200 mm are generally inserted over a distance of about 560 mm into the corresponding holes in the hub, and more particularly into the holes of the gear ring of the pitch mechanism - the blade angle adjustment.
  • the hoisting yoke is connected here to a n umber of so-called pads in a steel end plate of the blade (four protruding parts of this end plate).
  • the hoisting yoke can in principle also be connected to the blade root with a clamp or in any other suitable manner.
  • the hoisting yoke After mounting and tightening of the bolts the hoisting yoke can be pushed away in a controlled manner from the blade root by displacing carrier 30 back in the direction of boom 6 until hoisting yoke 300 is completely clear of the blade root.
  • hoisting yoke 300 When the hoisting yoke 300 is suspended relatively freely in hoisting tackle 8 of boom 6, this is a delicate operation which is preferably not be carried out when there is any wind.
  • the above described invention is particularly suitable for vertical blade assembly of rotor blades having a hoisting yoke close to the blade root. This is for instance the case with the blade of an Alstom-6MW turbine.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wind Motors (AREA)

Abstract

Cette invention concerne un dispositif de mise en place d'un élément structural, en particulier d'une aube de rotor d'une turbine éolienne. Ledit dispositif comprend des moyens de levage disposés sur une surface en forme de flèche tournant sur un axe horizontal dans un plan de levage. Ladite flèche comprend un dispositif de levage qui est relié à la flèche pour un déplacement dans le sens longitudinal de la flèche. Ledit dispositif de levage est doté de moyens d'accouplement conçus pour accoupler l'élément structural au dispositif de levage. Lesdits moyens d'accouplement sont déplacés parallèlement au plan de levage à partir d'une position proche de la flèche vers une position plus éloignée de la flèche et/ou vice versa. L'invention concerne en outre un procédé de mise en œuvre dudit dispositif.
PCT/IB2013/061204 2012-12-20 2013-12-20 Dispositif et procédé de mise en place d'un élément structural WO2014097254A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
BE2012/0864 2012-12-20
BE2012/0864A BE1021593B1 (nl) 2012-12-20 2012-12-20 Inrichting en werkwijze voor het ter zee plaatsen van een bouwwerkonderdeel
BE2013/0214 2013-03-28
BE201300214 2013-03-28

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WO2014097254A1 true WO2014097254A1 (fr) 2014-06-26

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10737914B2 (en) 2012-08-16 2020-08-11 W3G Shipping Ltd. Offshore crane
DE102019119901A1 (de) * 2019-07-23 2021-01-28 Liebherr-Werk Nenzing Gmbh Errichterschiffskran
WO2024008663A1 (fr) * 2022-07-04 2024-01-11 Dolfines Procede et systeme pour le montage d'une pale sur une eolienne en mer

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