DK178627B1

DK178627B1 - Method for use in single blade change on a wind turbine, and device for carrying out the method.

Info

Publication number: DK178627B1
Application number: DKPA201400575A
Authority: DK
Inventors: Per E Fenger
Original assignee: Liftra Ip Aps
Priority date: 2014-10-08
Filing date: 2014-10-08
Publication date: 2016-09-19
Also published as: DK201400575A1

Abstract

Der angives en fremgangsmåde til udførelse af enkeltvingeskift på en vindmølle (2), ved brug af et nær vindmøllens fod lokaliseret spilsystem (26, 28) med wirer (48), hvilket spilsystem omfatter kasteblokke (24 ) for forankring på/i nacellen (16) på vindmøllen, alternativt på øvrige monterede vinger (4, 6) på vindmøllens nav (18), samt en indretning til anvendelse ved udøvelse af fremgangsmåden ifølge opfindelsen omfattende to klemorganer (32, 34) der anbringes henholdsvis vingens spids (36) og vingens montagefaciliteter (37), hvoraf i det mindste det ene omfatter et med spilsystemets (26, 28) wirer (48) samvirkende kravlespil (56). Kombinationen af et jordbaseret spilsystem (25, 28) og klemorganerne (32, 34) med kravlespil (56), i hvilke vingen (10) er lejret under op-/nedhejsningen af denne fra vindmøllens nav (18), medfører mulighed for en bedre og mere effektiv styring af navnlig den sidste del af forskydningen af vingen (10), hvilket er ressource besparende.A method for performing single blade changes on a wind turbine (2) is indicated by using a winch foot (26, 28) located on the foot of the wind turbine (48), which gaming system comprises throw blocks (24) for anchoring to / in the nacelle (16). ) on the wind turbine, alternatively on other mounted blades (4, 6) of the wind turbine hub (18), and a device for use in carrying out the method according to the invention comprising two clamping means (32, 34) mounted on the blade tip (36) and the blade respectively. mounting facilities (37), at least one of which comprises a crawler (56) interacting with the wires (48) of the gaming system (26, 28). The combination of an earth based winch system (25, 28) and the clamping means (32, 34) with crawler (56), in which the wing (10) is mounted during the raising / lifting of it from the wind turbine hub (18), allows for a better and more effective control of, in particular, the last part of the displacement of the blade (10), which is resource saving.

Description

Den foreliggende opfindelse angår en fremgangsmåde til anvendelse ved enkeltvingeskift på en vindmølle ved brug af et nær vindmøllens fod lokaliseret spilsystem, samt en indretning til anvendelse ved udøvelse af fremgangsmåden.The present invention relates to a method for use in single blade switching on a wind turbine using a game system located near the wind turbine foot, and a device for use in the practice of the method.

Ved skift eller montage af en enkelt vinge på vindmøller, anvendes typisk de kendte mobilkraner, der tager en del tid at opstille, og som følgelig er relativt kostbare i drift. Dette forhold er der i nogen grad rådet bod på med indretningen angivet i WO 2011 050812 A1, Liftra ApS, hvor der angives et jordbaseret spil anbragt i en afstand fra vindmøllens fundament, hvilket spil står i forbindelse med wirehjul arrangement i nacelle eller på rotoren, hvilket spil anvendes til ophejsning af genstande, herunder vinger til vindmøllen, til relevante montagesteder, hvor genstandene der ophejses med spillet, styres på, og bæres af spillets wire. Imidlertid har praksis vist, at anvendelse af spillet ikke ved alle typer vindmøller er optimal til ophejsning af vingerne til et relevant montagested, idet flytning af det jordbaserede spil ikke er muligt under ophejsningen af vingen, hvor dettes wire bærer vingens vægt. Navnlig den sidste del af ophejsningen af vingen til montagestedet, skal vingen tilbagelægge en tilnærmelsesvist lodret forskydning, hvilket kun er muligt, såfremt trækket i spillets wire slækkes, således at wiren, der styrer forskydningen af vingen og tillige bærer denne, er forløbende tilnærmelsesvist lodret fra wirens fastgørelsespunkter på vindmøllens nav, nacelle, eller øvrige vinger, hvilket er uforeneligt med, at vingen skal hejses det sidste stykke til montagepositionen på vindmøllens nav. I WO2013/051167 A1 (MITSUBISHI HEAVY INUSTRIES, LTD) kendes en fremgangsmåde til montage/demontage af en vindmøllevinge på en vindmølle, og en indretning til anvendelse ved udøvelse af fremgangsmåden. Indretningen omfatter et første klemorgan og et andet klemorgan for anbringelse og løsbar fastgørelse på en vindmøllevinge. De to klemorganer er indbyrdes forbundne via en hovedbjælke og en bjælke. Vindmøllevingen fastholdes af klemorganet mellem holdeelementer på klemorganerne, der aktiveres ved hjælp af en aktuator. Vindmøllevingen monteres på vindmøllenavet ved hjælp af løftekabler, der er monteret på navet via ruller, og fastgjort til klemorganernes ende nærmest vindmøllens nav, og hvis modsatte ender er fastgjort til spil, der drives af en motor. Indretningen omfat ter yderligere et yderligere spil, der via ruller er fastgjort til klemorganet nærmest vindmøllevingens spids. I US 2007/0290426 A1 er angivet en indretning til anvendelse sammen med et jordbaseret spil, til montering af en vinge til en vindmølle, hvor vingen hæves fra en udgangsposition på jorden, ved foden af vindmøllens tårn, og til montagestedet på vindmøllens nav, hvor vindmøllens øvrige to vinger er anbragt i en symmetrisk position omkring vindmøllens lodrette midterakse. Indretningen omfatter et guideelement forløbende imellem vindmøllens tårn og jorden, og i det mindste en støtteindretning der i alt væsentligt er lokaliseret i luften på guideelementet og som bærer i det mindste en del af vingens vægt under transport af vingen imellem jorden og dennes montagested på vindmøllens nav. I det mindste en wire forløber imellem støtteindretningen og vindmøllevingen, hvorved længden af nævnte wire imellem støtteindretningen og vindmøllevingen kan justeres. Ved håndtering af vinger til vindmøller med indretningen omfatter denne dels en wire der er fastgjort til den del af vingen der skal fastgøres til vindmøllens nav, samt en wire hvis ende omfatter en løftepose hvori en del af vingens spids er anbragt under forskydning af vingen mellem jorden og montagestedet. Svagheden ved denne indretning er, at der benyttes tre spil for at anbringe møllevingen på montagestedet, desuden er støtteindretningen anbragt hængende i en wire, hvilket vil medføre ustabilitet under operation med denne. I WO 2011 050812 angives et jordbaseret spil anbragt i en afstand fra en vindmølles fod, omfattende kasteblokke anbragt på nacellen af vindmøllen, hvor spillets wire anvendes som guider og op- og nedhejsning af en byrde mellem jorden og et relevant montagested på vindmøllens nav eller i nacellen. Dette spil kan bl.a. benyttes til ophejsning af en vinge til montagestedet på vindmøllens nav, hvor vindmøllens øvrige to vinger er anbragt i en symmetrisk position omkring vindmøllens lodrette midterakse. Imidlertid kan det, som anført ovenfor, være vanskeligt at styre navnlig den sidste del af løftet, hvor vingen skal tilbagelægge en tilnærmelsesvist lodret forskydning i retning imod vindmøllens nav, hvor den montageflange, vindmøllevingen skal fastgøres i, befinder sig, idet det vil være nødvendigt at ændre vinklen på wiren der bærer og styrer vingens position, således at denne er tilnærmelsesvist hængende lodret ned fra kasteblokkene.When changing or mounting a single blade on wind turbines, the known mobile cranes are typically used which take some time to set up and are consequently relatively expensive to operate. This relationship has to some extent been remedied with the device specified in WO 2011 050812 A1, Liftra ApS, where an earth-based winch is placed at a distance from the wind turbine foundation, which winch is connected to wire wheel arrangement in the nacelle or on the rotor, which game is used for raising objects, including blades for the wind turbine, to relevant mounting points where the objects raised with the game are controlled and carried by the game's wire. However, practice has shown that the use of the game is not optimal for all types of wind turbines for raising the blades to a relevant mounting location, as moving the ground-based game is not possible during the raising of the blade, where its wire carries the weight of the blade. In particular, the last part of the lifting of the blade to the mounting point, the blade must provide an approximately vertical displacement, which is possible only if the pull in the wire of the game is slackened, so that the wire controlling the displacement of the blade and also carries it is approximately vertical. wire attachment points on the wind turbine's hub, nacelle, or other blades, which is incompatible with the blade having to be hoisted the last piece to the mounting position on the wind turbine's hub. WO2013 / 051167 A1 (MITSUBISHI HEAVY INUSTRIES, LTD) discloses a method for mounting / disassembling a wind turbine blade on a wind turbine and a device for use in the practice of the method. The device comprises a first clamping means and a second clamping means for placement and detachable attachment to a wind turbine blade. The two clamping means are interconnected via a main beam and a beam. The wind turbine blade is held by the clamping member between holding members of the clamping means which is actuated by an actuator. The wind turbine blade is mounted on the wind turbine hub by means of lifting cables mounted on the hub via rollers and secured to the end of the clamping members closest to the wind turbine hub, and the opposite ends of which are attached to winches driven by a motor. The device further comprises an additional winch which is secured via rollers to the clamping member closest to the tip of the wind turbine blade. US 2007/0290426 A1 discloses a device for use with an earth-based winch, for mounting a blade to a wind turbine, where the blade is raised from an initial position on the ground, at the foot of the wind turbine tower, and to the mounting location of the wind turbine hub, where the other two blades of the wind turbine are placed in a symmetrical position around the vertical center axis of the wind turbine. The device comprises a guide element extending between the tower and the ground of the wind turbine, and at least a support device which is substantially located in the air of the guide element and which carries at least a part of the weight of the blade during transport of the wing between the ground and its mounting location on the wind turbine hub. . At least one wire extends between the support device and the wind turbine blade, whereby the length of said wire between the support device and the wind turbine blade can be adjusted. When handling blades for wind turbines with the device, this includes a wire attached to the part of the blade to be attached to the wind turbine hub, and a wire whose end comprises a lifting bag in which a portion of the blade tip is placed during displacement of the blade between the ground and the mounting location. The weakness of this device is that three winches are used to place the milling blade at the mounting point, in addition, the support device is arranged hanging in a wire, which will cause instability during operation with it. WO 2011 050812 specifies a ground-based game located at a distance from the foot of a wind turbine, comprising throwing blocks placed on the nacelle of the wind turbine, where the game wire is used as guides and lifting and lifting of a load between the ground and a relevant mounting location on the wind turbine hub or in nacelle. This game can include is used for raising a blade to the mounting point on the wind turbine hub, where the other two blades of the wind turbine are placed in a symmetrical position around the vertical center axis of the wind turbine. However, as stated above, it may be difficult to control, in particular, the latter portion of the lift, where the blade must provide an approximately vertical displacement in the direction of the wind turbine hub, where the mounting flange to which the wind turbine blade is to be located, as will be necessary. changing the angle of the wire carrying and controlling the position of the blade so that it is approximately suspended vertically from the throw blocks.

Der er således et udtalt behov for en alternativ og bedre løsning, til at kunne styre den sidste del af løftet af en vindmøllevinge, der løftes imellem en position ved foden af vindmøllen og til montagestedet på vindmøllens nav, hvor der benyttes et jordbaseret spilsystem, hvis wire anvendes såvel til forskyde som til at styre forskydningen af en vindmøllevinge imellem en position ved en aktuel vindmølles fod og montagestedet, og det er således opfindelsen formål at angive en fremgangsmåde til anvendelse ved enkeltvingeskift, der sikrer en bedre styring og positionering af den sidste del af løftet af en vindmøllevinge, samt en indretning til anvendelse ved udøvelse af fremgangsmåden.Thus, there is a marked need for an alternative and better solution, to be able to control the last part of the lift of a wind turbine blade, which is lifted between a position at the foot of the wind turbine and to the mounting location of the wind turbine hub, using an earth-based gaming system, if wire is used both for displacement as well as for controlling the displacement of a wind turbine blade between a position at the current wind turbine's foot and the mounting location, and thus the invention aims to provide a method for single blade changeover operation which ensures better control and positioning of the last part of the lift of a wind turbine blade, and a device for use in the practice of the method.

En sådan fremgangsmåde til udførelse af enkeltvingeskift på en vindmølle, ved brug af et nær vindmøllens fod lokaliseret spilsystem, hvilket spilsystem omfatter kasteblokke for forankring på/i nacellen på vindmøllen, alternativt på øvrige monterede vinger på vindmøllens nav er kendetegnet ved at omfatte følgende trin; -montage af en letvægtskran i nacellen -anbringelse af et spilsystem nær vindmøllens fod -anbringelse af et første klemorgan med wirehjul og/eller kravlespil på vingen, nærmest dennes montagefaciliteter for montering på vindmøllens nav, og lukning af klemorganet -anbringelse af et andet klemorgan med wirehjul og/eller kravelspil på vingen, nærmest dennes spids, og lukning af det andet klemorgan -etablering af i det mindste en fast wireforbindelse imellem det første klemorgan og det andet klemorgan -føring og fastgørelse af det jordbaserede spilsystems løftewire til henholdsvis wirehjul på det første- og det andet klemorgan samt i det mindste et kravlespil, på det ene eller begge klemorganer, og videre til kasteblokkene -ophejsning af kasteblokkene med letvægtskranen til relevante forankringspunkter på/i nacellen eller på øvrige monterede vinger på vindmøllen -forankring af kastetblokkene på/i nacellen eller på øvrige monterede vinger på vindmøllen -initierende ophejsning af vingen ved det jordbaserede spilsystem, samtidigt med understøttelse af vingens spids ved hjælp af en mindre mobil jordbaseret løfter, indtil vingens spids er fri af jordoverfladen -ophejsning af vingen ved hjælp af det jordbaserede spilsystem til en position under dennes montageposition på navet -reduktion af trækket i det jordbaserede spils wire, således at wiren er orienteret tilnærmelsesvist lodret, eller i den foretrukne monterings vinkel for vingen -aktivering af kravlespillet på det jordbaserede spils wire for forskydning af vingen til monteringsstedet på vindmøllens nav -forankring af vingen på vindmøllens nav -åbning af klemorganerne, og nedhejsning af disse med det jordbaserede spil -frigørelse af kasteblokkene for det jordbaserede spil, og nedhejsning af dette med letvægtskranen -afmontering af letvægtskranenSuch a method for performing single blade changes on a wind turbine, using a game system located near the wind turbine foot, said game system comprising throwing blocks for anchoring on / in the nacelle of the wind turbine, or alternatively on other mounted blades on the wind turbine hub, is characterized by the following steps; -mounting a lightweight crane in the nacelle -making a gaming system near the windmill's foot -moving a first clamping means with wire wheels and / or crawling on the blade, closest to its mounting facilities for mounting on the windmill's hub, and closing the clamping means -mounting a second clamping member with wire wheel and / or crawler winch on the wing, closest to its tip, and closing of the second clamping means - establishing at least a fixed wire connection between the first clamping means and the second clamping means - and securing the lifting wire of the ground-based game system to the wire wheels of the first - and the second clamping member and at least one crawler, on one or both clamping means, and further to the throwing blocks - raising the throwing blocks with the lightweight crane to relevant anchorage points on / in the nacelle or on other mounted wings on the wind turbine - anchoring the throwing blocks on / in the nacelle or on other mounted wings on the wind turbine initiator raising the blade by the ground-based gaming system, while supporting the blade tip by means of a less mobile ground-based lifter until the blade tip is clear of the ground surface-raising the blade by the ground-based gaming system to a position below its mounting position on the hub - reduction of the draft of the ground-based game wire so that the wire is oriented approximately vertically, or at the preferred mounting angle for the blade -activation of the crawler on the ground-based game wire for displacement of the blade to the mounting location of the wind turbine hub-anchoring the blade to the wind turbine hub - opening of the clamping means, and lifting them with the ground-based game-release of the throw blocks for the ground-based game, and raising them with the lightweight crane -mounting of the lightweight crane

Fremgangsmåden udmærker sig ved, at den sidste del af forskydningen af vindmøllevingen finder sted ved aktivering af kravlespillet på klemorganerne, hvorved disse bærende vingen, forskydes opefter på det jordbaserede spils wirer, der på forhånd er ved det jordbaserede spil er positioneret i en foretrukken position, hængende ned fra en udvalgt position på nacellen, alternativt på navet eller de allerede monterede vinger på den aktuelle vindmølle. Eftersom det jordbaserede spils wirer er tilnærmelsesvist i ro, idet det jordbaserede spils træk i disse er konstant, vil den nævnte sidste del af forskydningen af vingen til denne montageposition på vindmøllens nav kunne udføres med relativt stor nøjagtighed, og følgelig også hurtigere end ved de kendte teknikker. Desuden vil det være mere overskueligt kun at skulle operere med kravlespillet under den sidste del af forskydningen af vingen til montagepositionen. Dog vil det jordbaserede spil også kunne anvendes i kombination med kravlespillet.The method is characterized in that the last part of the displacement of the wind turbine blade takes place by activating the crawler on the clamping means, whereby these supporting wings are displaced upwards on the wires of the ground-based game, which are positioned in advance in the ground-based game, in a preferred position. hanging down from a selected position on the nacelle, alternatively on the hub or wings already mounted on the current wind turbine. Since the wires of the terrestrial game are approximately at rest, the features of the terrestrial game being constant, the latter part of the displacement of the blade to this mounting position on the wind turbine hub can be carried out with relatively high accuracy, and consequently also faster than the known ones. techniques. Furthermore, it will be more manageable only to operate the crawler during the last part of the shift of the blade to the mounting position. However, the terrestrial game can also be used in combination with the crawl game.

En indretning til udøvelse af fremgangsmåden ifølge opfindelsen omfattende et første klemorgan og et andet klemorgan for anbringelse og løsbar fastgørelse på en vindmøllevinge henholdsvis nær dennes montagefaciliteter for montering på vindmøllens nav, og på vingen nærmest dennes spids, er kendetegnet ved, at klemorganerne udgøres af i hovedsagen omvendt U-formet rammeelementer, hvis første ben er fast, og hvis andet ben er drejeligt og arreterbart lejret til bunddelen af det omvendt U-formede rammeelement, og forskydeligt imellem en åben position hvor den relevante del af vingen kan passere ind imod bunddelen imellem det første og det andet ben, og en lukket position hvor det andet ben er forskudt i retning af det første ben, hvor det omvendt U-formede rammeelement i alt væsentligt omslutter, og er trykket imod vingen ved en første aktuator, hvor der på hver side af bunddelen findes med et jordbaseret spils wirer samvirkende første wirehjul, hvor henholdsvis det første, faste ben og det andet, drejeligt arreterbare ben på klemorganet nærmest vingens montagefaciliteter for montering på vindmøllens nav, omfatter yderligere med det jordbaserede spils wirer, andre samvirkende wirehjul, og hvor i det mindste det ene klemorgan omfatter et med det jordbaserede spil wirer samvirkende kravlespil.A device for carrying out the method according to the invention comprising a first clamping means and a second clamping means for mounting and releasably fastening on a wind turbine blade, respectively near its mounting facilities for mounting on the wind turbine hub, and on the blade closest to its tip, is characterized in that the clamping means are constituted by substantially inverted U-shaped frame members, the first leg of which is fixed and whose second leg is pivotally and releasably mounted to the bottom portion of the inverted U-shaped frame member, and slidable between an open position where the relevant portion of the blade can pass in towards the bottom portion the first and second legs, and a closed position where the second leg is displaced in the direction of the first leg, wherein the inverted U-shaped frame member substantially encloses, and is pressed against the wing by a first actuator, where on each side of the bottom part is found with a ground-based game wires cooperating first wire wheel, where it f first, fixed legs and the second, pivotally adjustable legs on the clamping member closest to the wing mounting facilities for mounting on the wind turbine hub further comprise the ground-based spindle wires, other cooperating wire wheels, and wherein at least one clamping member comprises a grounding spindle cooperating crawling games.

Vingen bæres således af to, ved stag indbyrdes forbundne U-formede rammer, hvis ene ben er forskydeligt således at vingen fastklemmes imellem benene af de U-formede rammer. I denne position ophejses vingen herefter først ved det jordbaserede spils wirer, ved at de U-formede rammer styres og bæres på wirerne af wirehjul monteret på rammerne. I den initierende fase understøttes vingespidsen kortvarigt af en mindre mobil løfteenhed for at skåne denne. Herefter forskydes og styres vingen opefter imod montagestedet på vindmøllens nav, ved det jordbaserede spils træk i wirerne, der tillige bærer vingen og indretningen, i hvis U-formede rammer, vingen er fastklemt. Trækket i det jordbaserede spils wirer slækkes når vingen ankommer til en på forhånd fastsat position i forhold til monteringsstedet således, at der opnås en foretrukket indgangsvinkel imellem wirerne og lodret der sikrer en optimal indføringsvinkel af montageflangen på vingen og montageflangen på navet. I denne position af det jordbaserede spils wirer, aktiveres kravlespillet(ene) hvorved vingen hæves det sidste stykke opefter til montagestedet i en hensigtsmæssig indgangsvinkel i forhold til navet. I den hensigt at være i stand til at dreje vingen for at kunne bringe hullerne i vingens monteringsflange til at overlappe hullerne i navets monteringsflange, kan de med det jordbaserede spils wirer samvirkende andre wirehjul være svingbart lejrede på henholdsvis det første, faste ben og det andet drejeligt, arreterbare ben på klemorganet nærmest vingens montagefaciliteter for montering på vindmøllens nav, og være forskydelige ved en anden aktuator.Thus, the blade is supported by two U-shaped frames interconnected by brackets, one leg of which is slidable so that the wing is clamped between the legs of the U-shaped frames. In this position, the wing is then first raised by the wires of the ground-based game by controlling and carrying the U-shaped frames on the wires of wire wheels mounted on the frames. In the initial phase, the wing tip is briefly supported by a smaller mobile lifting unit to protect it. Thereafter, the blade is displaced and guided upwards towards the mounting location on the wind turbine hub, by the ground-based play of the wires, which also carry the wing and the device in whose U-shaped frames, the blade is clamped. The pull of the ground-based coil wires is attenuated when the vane arrives at a predetermined position relative to the mounting location so as to obtain a preferred angle of entry between the wires and vertically ensuring an optimum insertion angle of the mounting flange of the vane and mounting flange of the hub. In this position of the wires of the ground-based game, the crawler (s) is activated, thereby raising the blade upwards to the mounting point at an appropriate angle of entry relative to the hub. In order to be able to rotate the blade in order to bring the holes in the wing mounting flange to overlap the holes in the hub mounting flange, the other wire wheels cooperating with the ground-based spindle may be pivotally mounted on the first, fixed leg and the second, respectively. rotatable, adjustable legs on the clamping member closest to the blade mounting facilities for mounting on the wind turbine hub, and slidable by another actuator.

Herved opnås det, at vingen ved aktivering af de andre aktuatorer, at vingen kan drejes en smule, således at montageflangernes huller på henholdsvis vingen og navet kan bringes til overlapning. I den hensigt at sikre en god fastholdelse af den i indretningen anbragte vinge, og for at undgå at beskadige dennes overflade under håndteringen af denne, kan klemorganerne lokalt på deres indbyrdes tilvendende sider, i det mindste hvor disse kommer i berøring med vingeoverfladen, være forsynede med en elastisk eftergivelig belægning, hvis overflade er skridhæmmende.Hereby it is achieved that by activating the other actuators the wing can be slightly rotated so that the holes of the mounting flanges on the wing and the hub can be overlapped, respectively. In order to ensure good retention of the blade disposed in the device, and to avoid damaging its surface during handling thereof, the clamping means may be provided locally on their mutually facing sides, at least where they come into contact with the wing surface. with an elastic resilient coating whose surface is anti-slip.

Herved opnås dels en god fastholdelse af vingen, samt at dennes overflade ikke beskadiges under op- og nedhejsning imellem jorden og montagestedet på navet. I den hensigt at sikre en vis afstand imellem klemorganerne, kan klemorganerne omfatte faciliteter for fastgørelse af i det mindste en, fortrinsvist flere stag tilhørende indretningen, for opretholdelse af en foretrukket indbyrdes afstand imellem klemorganerne i deres monterede position på vingen, under op- og nedhejsning af denne. I den hensigt at modvirke at vingeoverfladen beskadiges under håndteringen med indretningen ifølge opfindelsen, kan bunddelen og i det mindste et af benene på det U-formede rammeelement omfatter i det mindste en tværstillet bjælke, hvis ender kan være forsynede med justerbare tryksko, hvis frie ender er orienterede i retning af området afgrænset indvendigt af det U-formede rammeelement, til et niveau under den imod vingeoverfladen tilvendende side af bunddelen og i en afstand fra den imod vingeoverfladen vendende side af det aktuelle ben, og hvilke frie enders overflader udgøres af et elastisk eftergiveligt materiale.This results in good retaining of the blade, and that its surface is not damaged during lifting and lifting between the ground and the mounting point on the hub. In order to ensure a certain distance between the clamping means, the clamping means may comprise facilities for securing at least one, preferably several bars of the device, for maintaining a preferred spacing between the clamping members in their mounted position on the blade, during lifting and lifting. of this. In order to prevent damage to the wing surface during handling with the device according to the invention, the bottom part and at least one of the legs of the U-shaped frame element can comprise at least one transverse beam, the ends of which can be provided with adjustable pressure shoes, the free ends of which are oriented towards the area bounded internally by the U-shaped frame member, to a level below the wing-facing side of the bottom portion and at a distance from the side facing the wing surface of the actual leg, and which free end surfaces are constituted by an elastic resilient material.

Herved opnås det at den tilvendende side af bunddelen af de U-formede rammeelement kommer i berøring med vingens overflade under håndteringen af denne.Hereby it is obtained that the facing side of the bottom part of the U-shaped frame element comes into contact with the surface of the blade during handling thereof.

Opfindelsen forklares nærmere i det følgende med henvisning til tegningen, hvor; fig. 1 til fig. 41 er en illustration af sekvenserne i fremgangsmåden til anvendelse ved enkeltvingeskift på en vindmølle, ifølge opfindelsen, hvor visse af figurerne viser detaljerne ved en indretning til udøvelse af fremgangsmåden ifølge opfindelsen.The invention is explained in more detail below with reference to the drawing, wherein; FIG. 1 to FIG. Fig. 41 is an illustration of the sequences of the method of single blade change-over on a wind turbine, according to the invention, in which some of the figures show the details of a device for carrying out the method according to the invention.

Fig. 1 viser en vindmølle 2, med to vinger 4, 6 monterede og symmetrisk placerede i forhold til vindmøllens tårn 8 og den tredie vinge 10 liggende på jordoverfladen 12 nær vindmøllens fod 14.FIG. 1 shows a wind turbine 2, with two blades 4, 6 mounted and symmetrically positioned relative to the wind turbine tower 8 and the third wing 10 lying on the ground surface 12 near the wind turbine foot 14.

Fig. 2 er et nærbillede af vindmøllens top, med nacellen 16, og navet 18, med de to vinger 4, 6 monterede, og med monteringsfaciliteterne 20 for den tredie vinge 10 vendende nedad imod jordoverfladen (ikke vist) I fig. 3 der viser det samme som fig. 2, men med den forskel, at der nu på nacellen 16 er monteret en letvægtskran 22, beregnet for ophejsning af kasteblokke 24 med tilhørende fixtur (se fig. 4 og fig.17). I fig. 4 ses vindmøllen 2, med at jordbaseret spil 26, der i den viste udførelsesform er vist som indeholdt i en container 28 på en sættevognstrailer (se fig. 5, fig. 10 m.fl.), og en jordbaseret mobil kran 30 til håndtering af navnlig et første klemorgan 32 og et andet klemorgan 34. I fig. 5, 6, 7, 8, 9,10,11,12,13 ses en udførelsesform af det første klemorgan 32 og det andet klemorgan 34 og hvorledes disse anbringes nærmest henholdsvis spidsen 36 af vingen 10 (fig. 5,6,7,8 og 9), og nærmest dennes montagefaciliteter 37 for montering på vindmøllens nav 18, 20 (fig. 10, 11,12, og 13), med mobil kranen 30. Idet der henvises til fig. 5,6,7,8, 9,10,11,12,13 ses det generelt i den viste udførelsesform, at klemorganerne 32, 34 omfatter en i hovedsagen omvendt U-formet ramme 38, hvis første ben 40 er fast med rammens bunddel 42, samt et til bunddelen 42 svingbart og arreterbart andet ben 44, der ved en første aktuator 46 er forskydeligt imellem en åben position hvor den relevante del af vingen kan passere ind imod bunddelen 42 imellem det første 40 og det andet ben 44, og en lukket position hvor det andet ben 44 er forskudt i retning af det første ben 40, hvor den omvendt U-formede ramme 38 i alt væsentligt omslutter, og er trykket imod vingen 10 ved den første aktuator 46, hvor der på hver side af bund delen 42 findes med et jordbaseret spils wirer 48 samvirkende første wirehjul 50. Eftersom bunddelen af den omvendt U-formede ramme 38 på det første klemorgan 32, er kortere end bunddelen 42 på det andet klemorgan 34, er de første wirehjul 50 på det første klemorgan 32 i den viste udførelsesform, anbragt i enden af arme 64, 66 idet det jordbaserede spils wirer 48 er forløbende parallelt imellem spillet og kasteblokkene 24. Det det første, faste ben 40 og det andet, drejeligt arreterbare ben 44 på klemorganet 34 nærmest vingens montagefaciliteter 52 for montering på vindmøllens nav 18, omfatter yderligere med det jordbaserede spils wirer 48, andre samvirkende wirehjul 54. Wirehjulene 54 er svingbart monterede på benet 44, og forskydelige ved en aktuator 55, der eksempelvis udgøres at et hydraulisk, pneumatisk eller eldrevet stempel. I det mindste det ene klemorgan 32, 34 omfatter i det mindste et, med det jordbaserede spils wirer, samvirkende kravlespil 56 (fig. 12, 13).FIG. 2 is a close-up view of the wind turbine top, with the nacelle 16, and the hub 18, with the two blades 4, 6 mounted, and with the mounting facilities 20 of the third wing 10 facing downwards toward the ground surface (not shown). 3 showing the same as FIG. 2, but with the difference that a lightweight crane 22 is now mounted on the nacelle 16, intended for raising the throwing blocks 24 with associated fixture (see Fig. 4 and Fig. 17). In FIG. 4, the wind turbine 2 is shown with ground-based winch 26 shown in the illustrated embodiment as contained in a container 28 on a semi-trailer (see Fig. 5, Fig. 10, etc.) and a ground-based mobile crane 30 for handling of, in particular, a first clamping member 32 and a second clamping member 34. In FIG. 5, 6, 7, 8, 9, 10, 11, 12, 13, an embodiment of the first clamping member 32 and the second clamping member 34 is shown and how they are arranged closest to the tip 36 of the blade 10 respectively (Figs. 5, 6, 7, 8 and 9), and closest to its mounting facilities 37 for mounting on the wind turbine hubs 18, 20 (Figs. 10, 11, 12, and 13), with mobile crane 30. Referring to Figs. 5,6,7,8, 9,10,11,12,13 It is generally seen in the illustrated embodiment that the clamping members 32, 34 comprise a generally inverted U-shaped frame 38, the first leg 40 of which is fixed with the bottom part of the frame 42, and a second leg 44 pivotable and retractable to the bottom part 42, which at a first actuator 46 is displaceable between an open position where the relevant part of the blade can pass into the bottom part 42 between the first 40 and the second leg 44, and a closed position where the second leg 44 is displaced in the direction of the first leg 40, where the reverse U-shaped frame 38 substantially encloses, and is pressed against the wing 10 by the first actuator 46, where on each side of the bottom part 42 is provided with coaxial first wire wheels 50 of a ground-based game 48. Since the bottom portion of the inverted U-shaped frame 38 of the first clamping member 32 is shorter than the bottom portion 42 of the second clamping member 34, the first wire wheels 50 of the first clamping member 32 in the embodiment shown, affix to the end of arms 64, 66, the wires 48 of the ground-based game being parallel to the game and the throwing blocks 24. The first, fixed leg 40 and the second, pivotally adjustable leg 44 on the clamping member 34 closest to the blade mounting facilities 52 for mounting on the wind turbine hub 18 , further includes with the ground-based coil wires 48, other co-operating wire wheels 54. The wire wheels 54 are pivotally mounted to the leg 44, and slidable by an actuator 55 which is, for example, a hydraulic, pneumatic or electric driven piston. At least one clamping member 32, 34 comprises at least one co-operative crawling game 56 (Figs. 12, 13) with the wires of the ground-based game.

Som det endvidere fremgår af den viste udførelsesform af klemorganerne 32, 34, omfatter det første klemorgan 32 og det andet klemorgan 34, en støttebjælke 58 på det drejeligt arreterbare ben 44, hvis imod vingens overflade tilvendende sider er belagt med et elastisk eftergiveligt materiale 60, der kan være skridhæm-mende. Det andet klemorgan 34 omfatter yderligere i den viste udførelsesform en støttebjælke 62 på det første ben 40. Fælles for begge klemorganer 32, 34 gælder, at bunddelen 42 af den omvendt U-formede ramme 38 omfatter en tværstillet bjælke 39, hvis ender er forsynede med justerbare tryksko 41, hvis frie ender er orienterede i retning af området afgrænset indvendigt af det omvendt U-formede rammeelement, til et niveau under den imod vingeoverfladen tilvendende side af bunddelen 42 og i en afstand fra den imod vingeoverfladen vendende side af det aktuelle ben 40, 44, og hvilke frie enders overflader udgøres af et elastisk eftergiveligt materiale, der endvidere kan være skridhæmmende. I fig. 14 ses vingen 10, ned det første klemorgan 32, og det andet klemorgan monteret henholdsvis nærmest vingens spids 36, og nær montagefaciliteterne 37 for vingen. Som det fremgår af fig. 14, er klemorganerne indbyrdes forbundne med to stag/wirer 68 der forløber parallelt med vingen 10. I fig. 15 er wirerne 48 fra det jordbaserede spil 26, 28 ført via wirehjulene 50 på henholdsvis det første og det andet klemorgan 32, 34 og til kastetblokkene 24 og derfra til de andre wirehjul 54 og kravlespillet (ikke vist) på det andet klemorgan 34. I fig. 16 ses letvægtskranen 22 på nacellen 16 er klar til at ophejse kastetblokkene 24, der i den viste udførelsesform (se fig. 17, 20 og 21), er anbragt i en monteringskonsol 70, der omfatter to bøjler 72 beregnet for bæring af monteringskonsollen med kastetblokkene 24, på vindmøllens to øvrige vinger 4, 6, der er placeret symmetrisk i forhold til tårnet 8. I fig. 17 ses letvægtskranens wirer 74, der er forbundne med monteringskonsollen 70, med kastetblokkene 24, der i fig. 18 ses under ophejsning imod dennes monteringssted på vingerne 4, 6. I fig. 19 antydes det, at monteringskonsollen 70 er nået til nacelleområdet, som det tydeligere fremgår af fig. 20, hvor konsollen 70 fortsat holdes i position af wiren 74 på letvægtskranen, og hvor bøjlerne 72 er lagt an på vingerne 4, 6. I fig. 21 ses bøjlerne 72 anbragt og fastgjort til vingerne 4, 6 og med et stag 76 omfattende med bøjlerne 72 samvirkende bøjledele 78, anbragt imellem bøjlerne 72, således at afstanden imellem kastetblokkene 24 holdes konstant, og således at bøjlerne 72 i kombination med de samvirkende bøjledele 78, omslutter vingerne 4, 6, hvorved kastetblokkene 24 er fastgjort og klar til brug. I fig. 22 ses vingen 10 klar til at blive hævet fra sin position liggende på jorden 12 til montagestedet på vindmøllens nav 18, ved hjælp af det jordbaserede spil 26, 28. I fig. 23, fig. 24 og Fig. 25, ses det hvorledes vingen 10 hejses op med det jordbaserede spil 26, 28, hvor en jordbaseret mobilkran 30 understøtter vingens spids 36. I fig. 26 frigøres den jordbaserede kran 30 fra spidsen 36 af vingen 10, og vingen 10 bæres, styres og hejses herefter udelukkende på wirerne 48 tilhørende det jordbaserede spil 26, 28, som det fremgår af fig. 27 og fig. 28. I fig. 29 ses det, at wirerne 48 på det jordbaserede spil slækkes for at bringe vingen 10 i den korrekte montagevinkel i forhold til navet 18 på vindmøllen 2. I fig. 30 ses et udsnit af vingen 10, med klemorganet 34 nærmest montagefaciliteterne 52 for montering af vingen 10 på vindmøllens nav 18 vist, og hvor vingen 10 holdes i position ved et behersket træk i det jordbaserede spil 26, 28, kombineret med kravlespillet 56 på klemorganet 34. I fig. 31 ses vingen 10 med montagefaciliteterne 57 bragt til de dermed samvirkende montagefaciliteter 20 på navet 18, klar til initierende fastgørelse ved en eller flere bolte (ikke vist). I fig. 32 foretages den til montage af vingen 10 på navet 18, nødvendige drejning af vingen, således at hullerne (ikke vist) i henholdsvis montagefaciliteterne 37, 20, på vingen 10 og navet 18 bringes til overlapning ved forskydning af de andre wirehjul 54 ved aktivering af aktuatorerne 55 på klemorganet 34, hvorefter de resterende bolte (ikke vist) for fastgørelse af vingen 10 til navet 18, anbringes, og vingen 10 er herefter færdig monteret på navet 18.Further, as is apparent from the illustrated embodiment of the clamping members 32, 34, the first clamping member 32 and the second clamping member 34 comprise a support beam 58 on the pivotally adjustable leg 44, the sides of which are facing the surface of the blade with a resilient resilient material 60. that can be anti-slip. The second clamping member 34 further comprises in the illustrated embodiment a support beam 62 on the first leg 40. In common to both clamping members 32, 34, the bottom part 42 of the inverted U-shaped frame 38 comprises a transverse beam 39, the ends of which are provided with adjustable pressure shoes 41, the free ends of which are oriented towards the area bounded internally by the inverted U-shaped frame member, to a level below the wing surface facing side of the bottom portion 42 and at a distance from the side facing the wing surface of the actual leg 40 , 44, and which free end surfaces are constituted by a resilient resilient material which may further be anti-slip. In FIG. 14, the blade 10 is seen down the first clamping member 32, and the second clamping member mounted respectively closest to the tip 36 of the blade and near the mounting facilities 37 of the blade. As shown in FIG. 14, the clamping means are interconnected with two rods / wires 68 extending parallel to the wing 10. In FIG. 15, the wires 48 from the ground-based winch 26, 28 are routed via the wire wheels 50 on the first and second clamping means 32, 34 and to the throw blocks 24 and thence to the second wire wheels 54 and the crawler (not shown) on the second clamping means 34. FIG. 16, the lightweight crane 22 of the nacelle 16 is seen ready to raise the cast blocks 24 which, in the illustrated embodiment (see Figs. 17, 20 and 21), are mounted in a mounting bracket 70 comprising two brackets 72 intended for supporting the mounting bracket with the cast blocks. 24, on the other two blades 4, 6 of the wind turbine, which are symmetrically positioned relative to the tower 8. In FIG. 17, the wires 74 of the lightweight crane connected to the mounting bracket 70 are seen with the throw blocks 24, which in FIG. 18 is seen during raising against its mounting location on the wings 4, 6. In FIG. 19, it is suggested that the mounting bracket 70 has reached the nacelle area, as is more clearly seen in FIG. 20, where the bracket 70 is still held in position by the wire 74 on the lightweight crane and the brackets 72 are mounted on the wings 4, 6. In FIG. 21, the shackles 72 are seen and secured to the wings 4, 6 and with a rod 76 comprising the shackles 78 cooperating with the shackles 72, arranged between the shackles 72 so that the distance between the throw blocks 24 is kept constant and so that the shackles 72 in combination with the cooperating shackles 78, the wings 4, 6 enclose, whereby the throw blocks 24 are secured and ready for use. In FIG. 22, the wing 10 is seen ready to be raised from its position lying on the ground 12 to the mounting location of the wind turbine hub 18 by means of the ground-based winch 26, 28. In FIG. 23, FIG. 24 and FIG. 25, it is seen how the wing 10 is raised with the ground-based winch 26, 28, where an earth-based mobile crane 30 supports the wing tip 36. In FIG. 26, the terrestrial crane 30 is released from the tip 36 by the blade 10, and the blade 10 is then carried, guided and hoisted solely on the wires 48 of the terrestrial winch 26, 28 as shown in FIG. 27 and FIG. 28. In FIG. 29, it is seen that the wires 48 of the ground-based winch are slackened to bring the blade 10 at the correct mounting angle relative to the hub 18 of the wind turbine 2. In FIG. 30, a section of the blade 10, with the clamping member 34 closest to the mounting facilities 52 for mounting the blade 10 on the wind turbine hub 18, is shown, and where the blade 10 is held in position by a controlled pull in the ground-based winch 26, 28, combined with the crawl play 56 on the clamping member. 34. In FIG. 31, the wing 10 is seen with the mounting facilities 57 brought to the corresponding mounting facilities 20 on the hub 18, ready for initial attachment by one or more bolts (not shown). In FIG. 32, the blade necessary for mounting the blade 10 on the hub 18 is made so that the holes (not shown) in the mounting facilities 37, 20, on the blade 10 and the hub 18, respectively, are caused to overlap by displacing the other wire wheels 54 by activating the the actuators 55 on the clamping member 34, after which the remaining bolts (not shown) for attaching the blade 10 to the hub 18 are applied, and the blade 10 is then completed mounted on the hub 18.

Fig. 33 og fig. 34 viser hvorledes det første klemorgan 32 frigøres fra sit indgreb med vingen 10. Ved aktivering af den første aktuator 46, svinges det svingbart arreterbare ben 44 ud i åben postion.FIG. 33 and FIG. 34 shows how the first clamping member 32 is released from its engagement with the wing 10. Upon actuation of the first actuator 46, the pivotally adjustable leg 44 is pivoted out in open position.

Fig. 35 og 36 viser tilsvarende hvorledes det andet klemorgan 34 frigøres fra sit indgreb med vingen 10. Klemorganerne 32, 34 er herefter frit hængende i wi-rerne 48, som det ses i fig. 37, og efterfølgende strammes wirerne 48 ved det jordbaserede spil 26, 28, hvorved klemorganerne 32, 34 bringes fri af vingen 10, som det fremgår af fig. 38, og hejses ved det jordbaserede spil 26, 28 imod jordoverfladen 12, som det fremgår af fig. 39, hvor trækket i det jordbaserede spils wirer 48 slækkes, således at klemorganerne 32, 34 for jordkontakt. Sluttelig fires kastetblokkene 24, bøjlerne 72 og de dermed samvirkende bøjledele 78 og staget 76 til jordoverfladen 12 med wirerne 74 for letvægtskranen 22.FIG. 35 and 36 show similarly how the second clamping member 34 is released from its engagement with the wing 10. The clamping members 32, 34 are then freely suspended in the wires 48, as seen in FIG. 37, and subsequently the wires 48 are tightened by the grounding winch 26, 28, thereby releasing the clamping means 32, 34 from the wing 10, as shown in FIG. 38, and hoisted at ground 26, 28 against ground 12 as shown in FIG. 39, where the pull of the wires 48 of the ground-based coil is attenuated so that the clamping means 32, 34 for ground contact. Finally, the throw blocks 24, the shackles 72 and the cooperating shackle parts 78 and the bracket 76 are ground to the ground surface 12 with the cables 74 for the lightweight crane 22.

Sluttelig demonteres letvægtskranen 22 i nacellen 16, og fires ned med vindmøllens interne spil (ikke vist) hvorefter enkeltvingeskiftet er udført.Finally, the lightweight crane 22 is disassembled in the nacelle 16, and fired down with the wind turbine's internal winch (not shown) after which the single blade change is performed.

Det skal afslutningsvist anføres, at opfinderen har erkendt at klemorganerne 32, 34 til udøvelse af fremgangsmåden, kan antage andre udførelsesformer en de der er vist i den medfølgende tegning og beskrevet ovenfor, men dette ændrer ikke ved det opfinderiske aspekt der består i at angive midlerne der muliggør en hurtig og effektiv montage af en enkeltvinge 10 på vindmøller 2, ved anvendelse af de beskrevne klemorganer 32, 34 hvoraf i det mindste det ene er forsynet med et kravlespil 56 for hævning af vingen 10 det sidste stykke til dennes montagested 20 på vindmøllens nav 18, i kombination med et jordbaseret spil 26, 28, hvis wirer 48 er forbundet med kastetblokke 24 forankret på passende sted ved vingens monteringssted 20 på vindmøllens nav 18, for op- og nedhejsning og styring af vingen 10 imellem jordoverfladen 12 og montagestedet på vindmøllens nav.Finally, it should be noted that the inventor has recognized that the clamping means 32, 34 for carrying out the method may take other embodiments than those shown in the accompanying drawing and described above, but this does not change the inventive aspect which consists in defining the means. enabling quick and efficient mounting of a single blade 10 on wind turbines 2, using the described clamping members 32, 34, at least one of which is provided with a crawler 56 for raising the wing 10 the last piece to its mounting point 20 on the wind turbine hub 18, in combination with an earth-based winch 26, 28, whose wires 48 are connected to cast blocks 24 anchored in a suitable location at the blade mounting location 20 on the wind turbine hub 18, for raising and controlling the blade 10 between the ground surface 12 and the mounting location of the wind turbine's hub.

Claims

1. Method Ten! performing a single blade changeover on a wind turbine (2k by brewing near the wind turbine's foot game system (28, 28), which game system comprises throwing blocks (24) for anchoring on / in the nacelle (16) on wind turbines or alternatively on each mounted wing (4h 8 } on the wind turbines hub (18), characterized by comprising the following steps; - mounting of a lightweight crane (22) In the nacelle (18), - placing a spike system (26, 28) near the wind turbines foot, - applying electric first clamp (32) with rotary wheels (50) and / or crankshaft (68) on the wing (10), closest to its tip (36), and closing of the clamping member (32), positioning another clamping member (34) with wire wheels (80) and / or crawler clamp (56) on the blade (10), closest to its mounting facelets (3?) for mounting on the wind turbine hubs (18), and closing the core nut (32), establishing at least one free wire connection (88) between the first clamping means (32) and the second clamping means (34), guide and attach the ground-based spindle ilsystems lifting wire (48) ti! respectively, wire wheels (50, 54) on the first and second clamping means (32, 34) and at least collar screw (56) * on one or both sweep members (32,34), and further to the throwing blocks (24), mounting of the throw blocks (24) with the lightweight crane (22) to relevant anchorage points on / in the nacelle (16) or on other mounted wings (4,6) on the wind turbine (2), anchorage of the throw blocks (24) on / in the nacelle (16) ) or on other mounted blades (4.8) on the wind turbine (2), -Initial lifting of the blade (10) by the ground-based salivary sphincter (26, 28), while supporting the blade tip (38) by means of a smaller mobile ground-based lifter (30) until the tip of the blade (38) is free of the ground surface (12), raising the blade (10) by means of the ground-based salivary system (28, 28) to a position below its mounting position (20) on the hub ( 13), reduction of draw cat in the ground-based game wire (48) so that the wire is oriented approximately vertically or At the preferred mounting angle of the blade (10), activation of circular winding (§8) on the ground-based game wires (48) for displacement of the blade (10) to the mounting location (20) of the wind turbines hub (18), anchorage of the blade (10) on the wind turbines hub (18), opening of the germs (32, 34), and raising of these foods the ground-based game (28, 28, 48), "release of the castanock (24) for the Earth Basarada game ( 26,28,48), and lifting of this food the lightweight crane (22), removal of the lightweight crane (22).

2, Device for carrying out the method according to claim 1 and comprising first clamping means (32) and second clamping means (34) for placing and releasably fastening on a wind turbine blade (10) or near mounting facilities (3?) For forming hubs (18) on the wind turbines. ), and on the wing (10) closest to its tip (38), characterized in that the germs (32, 34) are formed in the main U-shaped frame elements (38), the first web (40) of which is fixed and the second web ( 44) is pivotally and releasably mounted ten bottom valleys (42) of said U-shaped frame member (38), and slidably at a farthest actuator (48) between an open position where relevant (3?, 38) part of the wing (10) can pass towards the bonding portion (42) between the first leg (40) and the second leg (44), and a closed position where the second leg (44) is displaced in the direction of the first leg (40) where the U-shaped frame element (38) In eleven substantially encloses, and is pressed against the wing (10) at the first acuaphor (48), where r side of the bottom dough (42) is found with ground-based game wires (48) interacting with the first wire wheel (60), the first fixed leg (40) and the second, pivotally adjustable web (44) at kiamorge.net (34) , closest to the wing mounting facilities (3?) for mounting on the wind turbines nev (18), further comprises the wires (48) of the ground-based coil, other cooperating wire hoi (54), and wherein at least one clamping member (32, 34) comprises at least one, with the coils of the ground-based game (48), cooperative crawling game (58),

3, Device According to claim 2, characterized in that the second wire wheels (S4) cooperating with the ground-based game wires (48) are pivotally mounted on the first fixed leg (40), respectively, the second rotatable, arreferable leg (44). ) on the kier means (34) closest to the wing mounting facilities (37) for mounting on the wind turbines hub, and slidable by another actuator (55).

Device according to claim 2 or 3, characterized in that the clamping means (32, 34) are provided locally on their mutually facing sides, at least where they come into contact with the wing (10), against an elastic effervescent coating. whose surface is anti-skid,

Device According to any one of claims 2-4, characterized in that the clamping means (32, 34) comprise facilities for securing at least one, preferably several bars (88) of the device, for maintaining a preferred mutual arrangement. distance between the clamping means (32, 34} in their mounted position on the wing (10), during raising and lowering thereof, 8, device according to any one of claims 2 '5. At least one of the legs (40,44} of the inverted U-shaped frame element (38) comprises at least one transverse beam (39), the ends of which are provided with adjustable pressure shoes (41} <whose free ends are oriented in the direction of the area bounded internally by the U-shaped frame member, to a level below the opposite side of the bottom portion of the bottom portion (42) and at a distance from the side facing the wall surface of the actual leg (40,44) and which free end surfaces is constituted by an elastic ef tergival mate tail. 7, in a rolling direction according to claim 8, characterized in that the surfaces of the free ends can further comprise an anti-skid coating.