DE102013205965A1 - Rotor blade tip - Google Patents

Abstract

The invention relates to a rotor blade (30) of a wind energy installation (100) with a main blade part and a blade tip (260), the blade tip (260) being releasably attached to the main part by means of a connecting device (202) and the connecting device (202) one to the The blade tip (260) has a tip portion (206) attached and a base portion (204) attached to the blade body for receiving the tip portion (206), the tip portion (206) having at least one fixing means (242) extending to the base portion (204) for fixing the tip portion (206) on the base section (204) and the fixing means (242) can be actuated to carry out the fixing through an opening (286) in the surface (282) of the blade tip (260).

Description

The present invention relates to a rotor blade of a wind turbine, which has a main part and a blade tip. Further, the present invention relates to a connecting device for connecting such a blade main body with the rotor blade tip, and the present invention relates to a rotor blade tip, which will also be referred to simply as a blade tip, and the present invention relates to a method for mounting a blade tip to a main part of a rotor blade.

An edge arc of a rotor blade for a wind turbine is off PCT / EP2003 / 014621 known. This rotor blade knows a so-called rotor blade tip, which is attached angled at the end of the rotor blade.

A disadvantage of in PCT / EP2003 / 014621 disclosed edge bow is that, as proposed, the edge bow, which can also be referred to as a rotor blade tip, made of aluminum. This edge bow can be correspondingly heavy and expensive to manufacture.

The terms edge bow, rotor blade tip or simply blade tip are used interchangeably in this application.

Wind turbines, in particular those of the type horizontal axis wind turbines with conventional manner three rotor blades are well known and such is in 5 shown. To improve the aerodynamics rotor blade tips are proposed, which are bent at the extreme end of a rotor blade from the rotor plane.

Since today's modern wind turbines use very large rotor blades, they can be a problem during transport. In this context, it can be a relief if the angled or bent blade tip is first mounted on site. It should also be borne in mind that in the event of a lightning strike the lightning strikes the outermost end of the rotor blade, ie the blade tip. Again, a replaceable blade tip may be useful to replace them after a lightning strike.

From the international patent application WO 2012/031976 is a removable rotor blade tip known. There it is proposed to insert a rotor blade tip in an end region of the rotor blade and also to produce a positive connection with a prestressed latch. In addition, a screw can serve as a security element.

Such a connection may also be disadvantageous, because at least must be worked through for actuation of said screw for securing through the surface of the rotor blade. It thus arises there on the rotor blade an impurity. To cover them up, painting would make it difficult to find this screw when changing the blade tip. Also, or otherwise, such an impurity may result in the penetration of moisture into the material of the rotor blade. Both rotor blade and the affected elements of the connecting device can be permanently damaged.

The object of the present invention is thus to address at least one of the problems mentioned. In particular, a solution for connecting a rotor blade tip to the main part of a rotor blade is to be proposed, which simplifies solvability and avoids damage to the rotor blade as much as possible. In particular, a particularly sustainable solution with little cost should be proposed. In particular, an improved edge bow or an improved rotor blade tip is to be proposed, which or in particular should be more cost-effective to produce. At least an alternative solution should be proposed.

According to the invention, an edge bow according to claim 1 is proposed. Subclaims describe advantageous embodiments.

To remedy the aforementioned disadvantages, an embodiment of the invention provides that the approach of the rotor blade tip is made of the same material as the rotor blade, and that only the tip, namely the first part is made of an electrically conductive material.

• – ein vollständig aus Aluminium hergestellter Randbogen schwerer ist als ein zumindest teilweise aus Glasfaserverbundwerkstoff hergestellter Randbogen.

An essential realization of the invention is based on the fact that

• - A completely made of aluminum edge bend is heavier than an at least partially made of fiberglass composite edge sheet.

The invention has the advantage, at least according to one embodiment, that the edge bow is made of the same material as the rotor blade, at least in the connection area between the rotor blade and the edge bow, and thus can be connected directly thereto via an adhesive connection.

Further details and advantages of the invention are disclosed in the embodiments also according to the drawings.

According to the invention, a rotor blade of a wind turbine according to claim 1 is proposed.

Accordingly, the rotor blade has a main part and a blade tip, wherein the blade tip is detachably fastened to the main part by means of a connecting device. The connecting device has a tip portion and a base portion. The tip portion is attached to the blade tip and the base portion is attached to the main part and prepared for receiving the tip portion, so adapted to this. The tip portion has at least one fixing means reaching to the base portion for fixing the tip portion to the base portion. The fixing means is operated to make the fixation through an opening in the surface of the blade tip. Preferably, this opening should be kept as small as possible, in particular so small that the fixing agent though actuated by the opening, but can not be used. Thus, an outwardly facing hole can be kept as small as possible.

Thus, the rotor blade tip can thus be attached to the main part and then fixation takes place through an opening in the surface of the blade tip.

Thus, an opening in the rotor blade main body can be avoided. This has the particular advantage that the rotor blade tip can be produced comparatively well as a single, compared to the rotor blade main body small component. Any openings for actuating the fixing means can be made precise manufacturing technology, whereby any damage to the blade tip can be avoided.

This also avoids that the blade tip suffers from the weather. However, should the blade tip be damaged in this area, so there is only a relatively small problem, because the blade tip can be relatively cheaply replaced.

The actuation through an opening in the surface of the blade tip takes place, for example, so that a corresponding wrench or screwdriver is guided through the opening to the fixing means.

Preferably, the blade main portion and, in addition or alternatively, the blade tip is made predominantly of fiber-reinforced plastic, in particular of glass fiber reinforced plastic. In particular, the rotor blade main body has some support structures that can be made of other material. In particular, the majority of the rotor blade outer shell is preferably made of fiber-reinforced plastic such as glass fiber reinforced plastic. It may be added to other materials such as coating or coating foils. The use of carbon fiber reinforced plastic comes into consideration.

It is proposed that in such a fiber-reinforced plastic, the base portion and the tip portion is laminated. For this purpose, the base portion or the tip portion of a corresponding, in particular worked out as a profile area, which may already be provided in the manufacture of the rotor blade in the corresponding manufacturing form. The rotor blade main body or the blade tip can thus already be present in its position during the provision of the corresponding scrim and then the introduction of the corresponding resin for producing the fiber-reinforced plastic and thus produced directly. In this sense, the lamination is to be understood, namely that the corresponding incorporation approach of the base portion or the tip portion is applied directly to the scrim or the scrims are placed directly on this section and soaked with resin.

Preferably, the tip portion and / or the base portion at least one connecting pin for tilt-stable insertion in corresponding openings on the base portion and the tip portion. Thus, for example, two parallel pins may be provided on the tip section, which are used for fastening in corresponding bores in the base section, in particular inserted. Likewise, the pins may be provided on the base portion, so that the blade tip is placed with its tip portion on these pins. Preferably, however, the pins are, as described above, at the tip portion, so that any transport problems are avoided in the main part of the rotor blade.

• – mit einem ersten Ende in eine korrespondierende Aufnahme in dem Basisabschnitt eingreift und
• – mit einem zweiten, dem ersten Ende abgewandten Ende, zum Vornehmen der Fixierung und zum Lösen der Fixierung in der Blattspitze angeordnet ist, wobei das zweite Ende so in die Blattspitze unter der Öffnung der Oberfläche der Blattspitze eingelassen ist, dass es durch die Öffnung in dieser Oberfläche betätigt werden kann und zwischen dem zweiten Ende und der Oberfläche Platz zum Anordnen eines Verschlussmittel zum zur Oberfläche bündigen Verschließen der Öffnung verbleibt.

A preferred rotor blade is characterized in that the at least one fixing agent

• - engages with a first end in a corresponding receptacle in the base portion and
• Is arranged with a second, the first end remote from the end, for making the fixation and for releasing the fixation in the blade tip, wherein the second end is so embedded in the blade tip under the opening of the surface of the blade tip that it passes through the opening in this surface can be actuated and space left between the second end and the surface for placing a closure means for closing the surface flush with the opening remains.

The fixing means thus extends from the blade tip section to the base section and thus from the blade tip to the rotor blade main body. The fixing means may be anchored in the base portion accordingly with a first end, which may also be referred to as a first portion. The second end, which can also be referred to as the second section, is arranged in the tip section and thus the blade tip below the opening of the blade tip. In this case, the arrangement below the opening refers to the corresponding surface in which the opening is arranged and below the surface thus means in the interior of the blade tip. However, this second end is not directly under the surface, but so far inside the blade tip, that in or below the opening sufficient space for a closure means remains. In this case, sufficient space is provided, so that the closure means can be inserted into the opening so that it can close flush, namely flush with the surface. An attached closure means, such as an attached plug, is thus avoided and thus enables an aerodynamically advantageous embodiment. It should be noted that the highest relative air velocities occur at the rotor blade tip.

Preferably, the fixing means is formed as a screw and can be screwed into the base portion through the opening at its screw head thus forming the second end of the fixing means into the base portion with its thread forming the first end of this fixing means.

One embodiment makes use of a bending of the blade tip and uses the corresponding bent portion for providing the opening for actuating the fixing means, namely the convex portion of the bend or the outer portion of the bend, in the sense of an outer curve. If the blade tip is thus bent to the pressure side of the rotor blade, the outer bend is on or to the suction side of the rotor blade. It is precisely at this area that it is proposed to provide the opening.

According to one embodiment, it is also proposed to use a closure means that forms an element of the rotor blade thus assembled after attaching the blade tip to the rotor blade main body. The closure means is provided for releasable fastening in the opening and has for this purpose a fastening mechanism. In that regard, so is not only a one-piece, elastic material, such as, for example, a plug before, but a fastening mechanism, which is designed in particular as a fastening mechanism that causes only a firm attachment in the corresponding opening by their operation.

Preferably, the closure means is prepared by a compression in a longitudinal direction to change its shape, its circumference and / or its width, in particular to increase, thereby to be held in the opening. This compression and the resulting change in shape, circumference or width is preferably provided only in a portion of the closure means. In particular, an elastic part, in particular an elastic element is compressed and thereby increases the circumference and thereby sets in the opening.

Preferably, the compression is effected by rotating a compression means, in particular a screw, whereby the attachment in the opening is effected. Turning in the opposite direction accordingly results in longitudinal stretching and a decrease in width, thereby releasing the attachment.

In order to avoid that the entire closure means rotates when rotating the compression means, an embodiment provides that the closure means has a holding portion adapted to the fixing means, or vice versa. This holding portion thus prevents co-rotation of the entire closure means when it is actuated accordingly, but the compression means and the closure means-closure means is not attached to the fixing means as a whole, but the fixation means prevents only said co-rotation of the closure means Verschlußmittels. This applies both to the fastening of the closure means, as well as for a release of the closure means.

A still further embodiment proposes that the rotor blade is characterized in that the connecting device is connected to lightning conductors and is prepared to forward electrical current of a striking the blade tip flash to the blade main section, and that preferably the closure means Verschlußmittel is designed to be electrically insulating, or so is made electrically conductive, that it can forward the electrical current of a striking into the closure means closure means flash to the connection device. There are thus provided lightning-directing means, which enables a discharging of a lightning strikes into the blade tip by the connecting device from the blade tip to the rotor blade main body. For example. For this purpose, the tip section can be electrically conductively connected to a corresponding lightning conductor in the blade tip and, in the inserted state, for example, make electrical conductivity to the base section via connecting pins, which in turn is in turn connected to lightning conductors in the main body of the blade. These pins and corresponding receptacles are dimensioned in this way, that a corresponding lightning current can be conducted at least in the short term.

For this purpose, the closure means closure means can be designed to be insulating, so that it is to be expected that a lightning strikes into another part, namely into an intended lightning-conducting means in the blade tip. Alternatively, the closure means closure means can be selectively carried out electrically conductive and extend to the surface of the blade tip accordingly. Accordingly, the shutter means is to be so designed and electrically connected to the tip portion that an electric current of a lightning strike can be dissipated through the shutter means, the tip portion and the base portion.

In addition, a connecting device for connecting a blade main body and a blade tip of a rotor blade to each other is proposed. This connecting device has the elements, features and / or properties that have already been described above in connection with at least one of the illustrated embodiments of the rotor blade. Also, a blade tip of a rotor blade is proposed, which has the elements, features and / or properties that have already been described above in connection with at least one embodiment of the rotor blade.

In addition, a method of mounting a blade tip to a blade body of a rotor blade is proposed. The method uses a blade tip as described above in connection with at least one embodiment of the rotor blade. In addition, the blade tip is to be mounted on a main part of a corresponding rotor blade.

The method proposes first of all to attach the blade tip with its tip portion to the base portion attached to the blade main body. As a result, the blade tip is first attached to the main part of the rotor blade and then fixed in a next step, in which the fixing agent is actuated, which has been described above in connection with at least one embodiment of the rotor blade.

The invention will be explained by way of example with reference to embodiments with reference to the accompanying figures.

1 shows a perspective view of an edge bow according to one embodiment.

2 shows an edge bow similar to the schematic representation of 2 in a top view.

3 shows to an edge bow similar to the 2 and 3 a lateral plan view of the rotor blade connection, namely the connection to the rotor blade main body.

4 schematically shows a rotor blade of a wind turbine with an edge bow.

5 shows a wind turbine in a perspective view.

6 shows a connection device according to an embodiment of the invention in an exploded view including lightning receptor but without closure means.

7 shows in an exploded view a part of the connecting device according to 6 with a rotor blade tip and with indicated closure means.

8th shows a tip portion of a connecting device including connected lightning receptor in a perspective view.

9 shows in a perspective, partially sectional view of a closure means and a part of a fixing device.

1 shows a perspective view of an edge bow according to the invention. In this view is the inner part of the lightning receptor 6 and the lightning conductor 5 not covered. The lightning conductor 5 is located inside the rim 1 , The tip of the lightning receptor 3 is made of an electrically conductive material. Particularly suitable here is aluminum or stainless steel, because these materials have a lower weight than steel or iron. The lightning protection receptor 3 is with an electrical conductor 5 connected, which can also be referred to as lightning protection conductors and the connection point of the rotor blade 4 to be led. The electrical conductor 5 may be either a shaped piece of steel or alternatively a cable.

At the rotor blade connection 4 is connected to a lightning conductor of the rotor blade. In the proposed embodiment, the connection is made by means of a screw connection.

As the edge bow 1 , except for the lightning receptor, is made entirely of glass fiber materials, the lightning receptor and lightning conductor 5 introduced and glued during manufacture in the glass fiber scrim. The edge bow is made of two half-shells, one each for the suction and pressure side. The half shells are made of glass fiber mats and a vacuum infusion process produced. At the end of production, the half-shells are glued to the lightning receptor.

After fabrication, outward is only the tip of the lightning receptor 3 to see. The inner part of the lightning receptor 6 is in the margin 1 hidden.

2 shows the edge bow in plan view. In this illustration, only the tip of the lightning receptor is 3 to see. The inner part of the lightning receptor 6 is incorporated in the margin sheet. The ratio (A / B) of outer 3 to inner part 6 of the lightning receptor is between 2.0 and 2.7, more preferably a ratio of 2.5. The ratio (C / D) of the height of the rim and the length of the connection to the rotor blade 4 is between 3 and 3.5.

The lightning conductor 5 of the edge bend is via a screw connection 11 connected to the lightning protection system of the rotor blade.

3 shows the edge bow 1 in a lateral plan view. The connection to the rotor blade is made by means of a water-resistant material 20 filled, so that the connection for lightning protection 5 not moved during operation of the wind turbine, and that can not penetrate condensate from the rotor blade in the edge arc. Accumulated condensation in the edge arc is dissipated through a hole in the edge bend as close as possible to the lightning receptor (not shown here). This hole is ideally drilled at a 45 ° angle so that rainwater can not penetrate into the edge bend and the accumulated water can be forced out through the hole. The sides of the rotor blade connection 4 are reinforced with a filling, so that at the occurring loads not the connection is damaged.

4 shows a rotor blade 30 a wind turbine with an edge bow according to the invention 1 ,

The lightning receptor or lightning protection receptor may also be referred to as the first portion of the edge arc. The connection to the rotor blade of the edge bend can also be referred to as the connection region of the edge bend. The lightning arrestor or lightning protection receptor has an outer and an inner part. The outer part forms an edge bow tip or has the edge bow tip, and the inner part of the lightning receptor or lightning protection receptor is provided for connection to the second part of the edge bend and can also be referred to as receptor attachment.

The 1 to 3 illustrate in particular the structure of the edge bow, namely in particular the use of different materials in the edge bow, in particular the use of an electrically conductive material for the tip of the lightning receptor 3 and the use of a fiber reinforced plastic substantially for the remainder of the rim.

The 6 to 9 relate to the attachment of an edge bow or a blade tip on a rotor blade or on the main part of the rotor blade. Such a kind of connection can also be used in the 1 to 3 described edge sheet may be used, where appropriate, minor adjustments to the edge of the 1 to 3 would be made, in particular around the tip section at the blade tip or the edge bow according to the 1 to 3 to arrange and to achieve operability of the fixative. Anyway, the aspects that are exemplary in connection with the 1 to 3 have been described with the aspects that exemplify the 6 to 9 can be combined, and according to embodiments of the present invention, such combinations are also proposed.

The rotor blade, the exemplary and very simplistic in 3 can be shown, both an edge bow according to the 1 to 3 , as well as one according to 7 exhibit and the edge bow 1 is preferably fastened with a fastening device, as it or as parts of it in the 6 to 9 to be discribed. The overview of the 4 However, there is the specific way of attaching the edge bow 1 on the rotor blade 30 not again.

Similarly, the rotor blades attached to the wind turbine according to 5 are shown, in each case an edge bow according to the 1 to 3 and / or secured by means of a connecting device to the details in the 6 to 9 exemplified.

5 shows a wind turbine 100 with a tower 102 and a gondola 104 , At the gondola 104 is a rotor 106 with three rotor blades 108 and a spinner 110 arranged. The rotor 106 is set in operation by the wind in a rotary motion and thereby drives a generator in the nacelle 104 at. 5 shows in this sense a wind turbine 100 with rotor blades according to the invention and rotor blade tips or edge bends.

6 shows a connecting device 202 with a base section 204 and a top section 206 , There is also a lightning receptor 208 shown and with the top section 206 electrically connected.

The base portion has a blade connection area 210 to arrange in an area of the rotor blade, namely at its end and to attach. He has especially large adhesive surfaces 212 and 214 on, which can be glued there with the glass fiber reinforced material of the rotor blade. As conclusion is a conclusion base plate 216 at the sheet connection area 210 by means of two fixing screws 218 attached. The final base plate 216 In this case has the profile of the rotor blade in the area, thereby achieving a clean completion of the rotor blade to be attached to the blade tip.

At the end base plate 216 is from the inside, namely in one to the blade connection area 210 pointing area, a threaded sleeve 220 used, which has an internal thread and in the assembled state of the base portion 204 is accessible from the outside.

In the perspective view of 7 It can also be seen that the blade connection area 210 a sleeve pickup 222 for receiving the threaded sleeve 220 having.

6 points to the tip section 206 in that this one end tip plate 224 has, which is to form a conclusion of the applied blade tip and also about the profile of the rotor blade or the blade tip has in this area. On adhesive surfaces 226 and 228 becomes the final tip plate 224 attached glued to the blade tip.

For attaching or inserting the blade tip on or in the sheet end, namely the base portion 204 , has the final tip plate 224 two insertion pins or insertion bolts 230 on that in the pin base holes 232 be used firmly. To attach the blade tip to the rotor blade these insertion pins 230 then through appropriate insertion openings 234 in the final base plate 216 rich and in insertion shots 236 in the blade connection area 210 used only in perspective according to 7 you can see. Between the end base plate 216 and the termination tip plate 224 becomes a parting line 240 provided, which has about the nature and extent of a so-called O-ring seal. The parting line 240 achieved that the end base plate 216 and the termination tip plate 224 be attached spaced apart with a small joint. As a result, the parting line 240 If necessary, make small adjustments.

To fix then a screw 242 , which works here as a fixative, via a clamping sleeve 244 , a fixing hole 246 and another center hole 248 in the threaded sleeve 220 screwed. Through the clamping sleeve 244 can be maintained a bias and fatigue of the connection is thereby avoided, at least greatly delayed.

8th shows in this respect a composite tip section 206 which connects to the base section 204 is prepared. The 8th also illustrates a first end area 250 , with which the fixative or the screw 242 in the threaded sleeve 220 to engage, and a second end 252 , which is designed here as a screw head, and on the clamping sleeve 244 attaches.

In the 6 and 8th is also the electrical connection of the lightning receptor 208 via an electrical line 254 at the end tip plate 224 in the area of a plate connection 256 connected. At the receptor 208 is a receptor connection 258 intended.

Of the 7 is also a blade tip 260 which is shown here only schematically and in particular the lightning receptor 208 not worked out in this presentation. This blade tip is to the pressure side 262 of the rotor blade and thus also the blade tip 260 bent. This creates on the suction side 264 a convex curvature or by the curvature of a convex surface 266 through which the fixative 242 can be operated. In addition, the spacer sleeve 244 and also the fixative 242 through such an opening, which in the perspective of 7 but not visible, in the leaf tip 260 be introduced. 7 also indicates a closure means 280 at. This closure means 280 is in 9 shown in detail. The partially cut representation of the 9 indicates a surface area 282 the leaf tip 260 at. There is also an opening edge 284 shown in which an opening 286 is formed, in which the closure means 280 is used.

In this case, the closure means 280 a graduation section 288 up to the surface 282 extends or in the area shown the surface 282 formed. Adjacent to the final section 288 is a compression body 290 , wherein the compression body 290 and the final section 288 are shown cut.

For upsetting is a compression agent 292 basically designed as a screw and engages in a counter-body 294 one. The counterbody 294 has a pressure washer 296 and a holding section 298 on. The holding section 298 is designed as an external hexagon and basically sits like a corresponding hex wrench in the screw head 252 of the fixing agent 242 , The screw head 252 has a hexagon socket in the area in which the holding section 298 how a corresponding wrench is used. The holding section 298 basically just sits loosely in this screw head 252 and the screw head 252 only prevents that mating body 294 when turning the compression means 292 is turned. A connection to the screw head 252 otherwise does not exist according to this embodiment. The screw head 252 thus forms a holding receptacle for this holding section 298 ,

Will now the compression agent 292 for example, about his screw head 300 in the opposite body 294 screwed in, the distance between the termination section decreases 288 and the pressure washer 296 of the opposite body 294 , The compression body 290 is thereby compressed and widens outward. As a result, in the example shown, an attachment of the closure means is essentially via a frictional connection 280 in the opening 286 reached.

The closure means 280 indicates for pressing the compression means 292 another small opening 302 on, but compared to the opening 286 is small and neither aerodynamically presents a problem, nor easily allows the ingress of water or polluted air.

• Ausführung 1: Randbogen eines Rotorblattes einer Windenergieanlage, wobei der Randbogen einen ersten Abschnitt aus wenigstens einem ersten, elektrisch leitfähigen Material, und einen zweiten Abschnitt aus einem zweiten, elektrisch nicht leitfähigen Material aufweist.
• Ausführung 2. Randbogen nach Ausführung 1, dadurch gekennzeichnet, dass das erste Material ein Metall, insbesondere Aluminium, ist oder umfasst, und/oder dass das zweite Material ein glasfaserverstärkter Kunststoff (GFK) oder kohlenstofffaserverstärkter Kunststoff (CFK) ist oder umfasst.
• Ausführung 3. Randbogen nach Ausführung 1 oder 2, dadurch gekennzeichnet, dass der Randbogen in seinem zweiten Abschnitt einen Anschlussbereich zum Anschließen an das Rotorblatt, insbesondere zum Einstecken in das Rotorblatt aufweist, und in seinem ersten Abschnitt eine dem Anschlussbereich abgewandte Randbogenspitze aufweist, wobei die Randbogenspitze das erste Material und der Anschlussbereich das zweite Material aufweist.
• Ausführung 4. Randbogen nach einer der Ausführungen 1 bis 3, dadurch gekennzeichnet, dass sich der erste Abschnitt bzw. das erste Material von der Randbogenspitze bis zu einer Strecke von 5% bis 30%, insbesondere 10% bis 20% bis zum Anschlussbereich erstreckt, und/oder dass sich der zweite Abschnitt bzw. das zweite Material von dem Anschlussbereich bis zu einer Strecke von 70% bis 95%, insbesondere 80% bis 90% bis zur Randbogenspitze erstreckt.
• Ausführung 5. Randbogen nach einer der Ausführungen 1 bis 4, dadurch gekennzeichnet, dass der erste Abschnitt als Blitzrezeptor vorgesehen ist und zum Blitzableiten mit einer elektrisch leitfähigen Anschlussverbindung, insbesondere Blitzschutzleitung versehen ist, zum Anschließen an eine elektrische Leitung zum Blitzableiten im Rotorblatt, wobei vorzugsweise die elektrisch leitfähige Anschlussverbindung durch den zweiten Abschnitt zu der elektrischen Leitung zum Blitzableiten geführt wird und/oder die elektrisch leitfähige Anschlussverbindung mit einem Anschlussmittel zum elektrischen Anschließen an die elektrische Leitung im Rotorblatt versehen ist.
• Ausführung 6. Randbogen nach einer der Ausführungen 1 bis 5, dadurch gekennzeichnet, dass der zweite Abschnitt einen mit Isolationsmaterial gefüllten Innenraum aufweist, zum isolierten Führen einer bzw. der elektrisch leitfähigen Anschlussverbindung.
• Ausführung 7. Randbogen nach einer der Ausführungen 1 bis 6, dadurch gekennzeichnet, dass ein bzw. der Innenraum in einer Hülle aus eine Wabenstützstruktur aus Kunststoff ausgebildet ist und/oder darin eine Vergussmasse, insbesondere als Isolationsmaterial darin vorgesehen ist, und/oder dass in dem zweiten Abschnitt eine Verstärkung vorgesehen ist, die vorzugsweise zu einer Vorderkante des Randbogens weist und/oder benachbart zur Wabenstützstruktur angeordnet ist.
• Ausführung 8. Randbogen nach einer der Ausführungen 1 bis 7, dadurch gekennzeichnet, dass der erste Abschnitt zum Verbinden mit dem zweiten Abschnitt, insbesondere zum Einsetzen in den zweiten Abschnitt, einen Rezeptoransatz aufweist.
• Ausführung 9. Randbogen nach einer der Ausführungen 1 bis 8, dadurch gekennzeichnet, dass der Randbogen vom ersten Abschnitt zum zweiten Abschnitt hin gebogen, gekrümmt oder abgewinkelt ist, insbesondere um einen Winkel im Bereich von 70° bis 110°, insbesondere im Bereich von 80° bis 100°, vorzugsweise etwa um 90°.
• Ausführung 10. Rotorblatt einer Windenergieanlage, umfassend einen Randbogen nach einer der Ausführungen 1 bis 9.
• Ausführung 11. Rotorblatt nach Ausführung 10, dadurch gekennzeichnet, dass das Rotorblatt einen Endbereich zum Ansetzen des Randbogens aufweist und der zweite Abschnitt des Randbogens das gleiche Material aufweist, wie der Endbereich des Rotorblatts.
• Ausführung 12. Windenergieanlage mit wenigstens einem Rotorblatt nach Ausführung 10 oder 11.
• Ausführung 13. Verfahren zum Herstellen eines Randbogens eines Rotorblattes, insbesondere nach einer der Ausführungen 1 bis 9, wobei ein erster Abschnitt aus einem ersten, elektrisch leitfähigen Material, und ein zweiter Abschnitt aus einem zweiten, elektrisch nicht leitfähigen Material, insbesondere aus glasfaserverstärktem Kunststoff oder kohlenstofffaserverstärktem Kunststoff gefertigt wird, und der erste Teil, insbesondere zusammen mit einem Blitzschutzleiter, während der Fertigung in ein Glasfasergelege bzw. Kohlenstofffasergelege zumindest teilweise eingebracht und verklebt wird.
• Ausführung 14. Verfahren nach Ausführung 13, dadurch gekennzeichnet, dass der zweite Teil aus zwei Halbschallen gefertigt wird, von denen je eine für die Saug- und Druckseite des Rotorblattes hergestellt wird.

According to the following statements are proposed and should be claimed according to the invention:

• Embodiment 1: Edge bow of a rotor blade of a wind energy plant, wherein the edge bow has a first portion of at least a first, electrically conductive material, and a second portion of a second, electrically non-conductive material.
• Embodiment 2. Edge bow according to embodiment 1, characterized in that the first material is or comprises a metal, in particular aluminum, and / or that the second material is or comprises a glass fiber reinforced plastic (GRP) or carbon fiber reinforced plastic (CFRP).
• Embodiment 3. Edge bow according to embodiment 1 or 2, characterized in that the edge bow has in its second section a connection area for connection to the rotor blade, in particular for insertion into the rotor blade, and in its first portion facing away from the terminal area edge bow tip, wherein the Edge bow tip, the first material and the connection area has the second material.
• Embodiment 4. Edge bow according to one of the embodiments 1 to 3, characterized in that the first portion or the first material extends from the edge bow tip to a distance of 5% to 30%, in particular 10% to 20% to the connection area, and / or that the second section or the second material extends from the connection region to a distance of 70% to 95%, in particular 80% to 90%, up to the edge of the arch.
• Embodiment 5. Edge bow according to one of the embodiments 1 to 4, characterized in that the first section is provided as a lightning receptor and is provided for lightning with an electrically conductive connection connection, in particular lightning protection line, for connection to an electrical line for lightning in the rotor blade, preferably the electrically conductive connection connection is led through the second section to the electrical line for lightning discharge and / or the electrically conductive connection connection is provided with a connection means for electrical connection to the electrical line in the rotor blade.
• Embodiment 6. Edge bow according to one of the embodiments 1 to 5, characterized in that the second section has an interior filled with insulating material, for the isolated guiding one or the electrically conductive connection connection.
• 7. Edge bow according to one of the embodiments 1 to 6, characterized in that one or the interior is formed in a shell of a honeycomb support structure made of plastic and / or therein a potting compound, in particular as insulation material is provided therein, and / or in the second portion is provided with a reinforcement, which preferably points to a front edge of the edge bow and / or is arranged adjacent to the honeycomb support structure.
• Embodiment 8. Edge bow according to one of the embodiments 1 to 7, characterized in that the first section for connecting to the second section, in particular for insertion into the second section, has a receptor attachment.
• Embodiment 9. Edge bow according to one of the embodiments 1 to 8, characterized in that the edge bow is bent from the first portion to the second portion, curved or angled, in particular by an angle in the range of 70 ° to 110 °, in particular in the range of 80 ° to 100 °, preferably about 90 °.
• Embodiment 10. Rotor blade of a wind turbine, comprising an edge bow according to one of the embodiments 1 to 9.
• Embodiment 11. Rotor blade according to embodiment 10, characterized in that the rotor blade has an end region for applying the edge bow and the second portion of the edge bow has the same material as the end portion of the rotor blade.
• Version 12. Wind energy plant with at least one rotor blade according to design 10 or 11.
• Embodiment 13. A method for producing an edge bow of a rotor blade, in particular according to one of the embodiments 1 to 9, wherein a first portion of a first, electrically conductive material, and a second portion of a second, electrically non-conductive material, in particular glass fiber reinforced plastic or made of carbon fiber reinforced plastic, and the first part, in particular together with a lightning conductor, is at least partially introduced and bonded during manufacture in a Glasfasergelege or carbon fiber layer.
• 14. Method according to embodiment 13, characterized in that the second part is made of two half-shells, one of which is made for the suction and pressure side of the rotor blade.

LIST OF REFERENCE NUMBERS

1

wingtip

2

 Surface edge bow

3

 Lightning receptor (outer part)

4

 Connection to the rotor blade

5

 Lightning Head

6

 Lightning protection receptor (inner part)

10

 Honeycomb support structure Reinforcement of the edge arch

11

Connection for lightning receptor

20

 filling

21

 reinforcement

30

 Rotor blade of a wind turbine

202

 connecting device

204

 base section

206

 tip portion

208

 lightning receptor

210

 Blade connection area

212

 adhesive surfaces

214

 adhesive surfaces

216

 Degree base plate

218

 mounting screws

220

 threaded sleeve

222

 sleeve receiving

224

 Tip end plate

226

 adhesive surfaces

228

 adhesive surfaces

230

 / Bolts gudgeon

232

 Pen-based drilling

234

 insertion

236

 insertion sockets

240

 parting line

242

 Screw / fixing

244

 clamping sleeve

246

 locating pin

248

 center bore

250

 first end area

252

 second end area / screw head

254

 electrical line

256

 panel connector

258

 receptor port

260

 blade tip

262

 pressure side

264

 suction

266

 convex surface / curvature

280

 closure device

282

 surface area

284

 opening edge

286

 opening

288

 final section

290

 compression body

292

 Compression means / screw

294

 against body

296

 thrust washer

298

 holding section

300

 Screw head 292

302

 actuating opening

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 2003/014621 [0002, 0003]
• WO 2012/031976 [0007]

Claims (19)

Rotor blade ( 30 ) of a wind turbine ( 100 ) with - a leaf main part and - a leaf tip ( 260 ), wherein - the blade tip ( 260 ) by means of a connecting device ( 202 ) is releasably secured to the main body and the connecting device ( 202 ) - one at the tip of the blade ( 260 ) attached tip section ( 206 ) and - a base portion attached to the blade body ( 204 ) for picking up the tip section ( 206 ), wherein the tip section ( 206 ) - at least one to the base section ( 204 ) fixing agent ( 242 ) for fixing the tip section ( 206 ) at the base portion ( 204 ) and - the fixing agent ( 242 ) for making the fixation through an opening ( 286 ) in the surface ( 282 ) of the blade tip ( 260 ) is actuated therethrough. Rotor blade ( 30 ) according to claim 1, characterized in that the blade main section and / or the blade tip ( 260 ) is made predominantly of fiber-reinforced plastic, in particular glass fiber reinforced plastic, and the base section ( 204 ) in the blade main section and / or the tip section ( 206 ) in the blade tip ( 260 ) is laminated. Rotor blade ( 30 ) according to one of claims 1 or 2, characterized in that the tip section ( 206 ) and / or the base section ( 204 ) at least one connecting pin ( 230 ) for tilt-stable insertion into corresponding openings ( 236 ) at the base portion ( 204 ) or the tip section ( 206 ) having. Rotor blade ( 30 ) according to one of the preceding claims, characterized in that the at least one fixing agent ( 242 ) - with a first end region ( 250 ) into a corresponding recording ( 220 ) in the base section ( 204 ) and - with a second, the first end region ( 250 ) end region ( 252 ), to perform the fixation and to release the fixation in the blade tip ( 260 ), wherein the second end region ( 252 ) so in the blade tip ( 260 ) under the opening ( 286 ) of the surface ( 282 ) of the blade tip ( 260 ) is inserted through the opening ( 286 ) in this surface ( 282 ) and between the second end region ( 252 ) and the surface ( 282 ) Place for placing a closure means ( 280 ) to the surface ( 282 ) flush closing the opening ( 286 ) remains. Rotor blade ( 30 ) according to one of the preceding claims, characterized in that the fixing agent ( 242 ) as a screw ( 242 ) is formed with one or the first end region ( 250 ) as a thread for screwing into a or the corresponding receptacle ( 220 ) in the base section ( 204 ) and one or the second end region ( 252 ) as a screw head ( 252 ) for actuating the screw ( 242 ). Rotor blade ( 30 ) according to one of the preceding claims, characterized in that the blade tip ( 260 ) is bent, in particular to the pressure side of the rotor blade ( 1 ), and in a resulting outer bend ( 266 ) the opening ( 286 ) for actuating the fixing agent ( 242 ) is trained. Rotor blade ( 30 ) according to one of the preceding claims, characterized in that one or the closure means ( 280 ) and that the closure means ( 280 ) for releasably securing in the opening ( 286 ) has a fastening mechanism. Rotor blade ( 30 ) according to one of the preceding claims, characterized in that the closure means ( 280 ) is prepared, by a compression in a longitudinal direction, at least a subsection ( 290 ), its shape, its scope and / or its width at least in this subsection ( 290 ), in particular to enlarge in order thereby in the opening ( 286 ) to be held. Rotor blade ( 30 ) according to claim 8, characterized in that the compression by rotating a compression means ( 242 ), in particular a screw ( 242 ), is effected or released and that the closure means ( 280 ) one to the fixative ( 242 ) adapted holding section ( 252 ) and / or the fixing agent ( 242 ) one to the closure means ( 280 ), in particular the holding section ( 298 ) adapted holding receptacle ( 252 ) to or on the fixative ( 242 ) to be held so that the closure means ( 280 ) when turning the compression means ( 290 ) does not rotate. Rotor blade ( 30 ) according to one of the preceding claims, characterized in that the connecting device ( 202 ) with lightning conductors ( 208 . 254 ) and is prepared to forward electrical current of a lightning striking the blade tip to the blade main section, and preferably that the closure means ( 280 ) are designed to be electrically insulating, or are designed to be electrically conductive, that they the electrical current of a in the closure means ( 202 ) striking lightning to the connection device ( 202 ) can forward. Connecting device ( 202 ) for connecting a main blade part and a blade tip ( 260 ) of a rotor blade ( 1 ) to each other, wherein the connecting device ( 202 ) - one at the tip of the blade ( 260 ) to be fastened tip section ( 206 ) and - a base portion to be attached to the blade body ( 204 ) for picking up the tip section ( 206 ), wherein the tip section ( 206 ) - at least one to the base section ( 204 ) fixing agent ( 242 ) for fixing the tip section ( 206 ) at the base portion ( 204 ) and - the fixing agent ( 242 ) for making the fixation through an opening ( 286 ) in the surface ( 282 ) of the blade tip ( 260 ) is actuated therethrough. Connecting device ( 202 ) according to claim 11, characterized in that it is ready for use in a rotor blade ( 30 ) according to one of claims 1 to 10 to be used as intended. Blade tip ( 260 ) of a rotor blade ( 1 ) of a wind turbine ( 100 ) with a tip section ( 206 ) a connection device ( 202 ) according to one of claims 11 or 12, wherein the blade tip ( 260 ) with the tip section ( 206 ) is prepared in a rotor blade ( 30 ) to be used according to one of claims 1 to 9 as intended. Method for mounting a blade tip ( 260 ) according to claim 13 on a blade main part of a rotor blade ( 1 ) according to any one of claims 1 to 10, comprising the steps of: - applying the blade tip ( 260 ) with its tip section ( 206 ) on the base portion attached to the blade body ( 204 ) and - fixing the thus-applied blade tip ( 260 ) by actuating the fixing agent ( 242 ). A method according to claim 14, characterized in that after fixing a or the closure means ( 280 ) in the opening ( 286 ) of the rotor blade ( 1 ) and in the opening ( 286 ), in particular by actuating one or the compression means ( 292 ). Edge bow ( 1 ) of a rotor blade ( 30 ) of a wind turbine ( 100 ), whereby the edge bow ( 1 ) a first section ( 3 ) of at least one first, electrically conductive material, and a second section ( 2 ) comprises a second, electrically non-conductive material. Rotor blade ( 30 ) of a wind turbine ( 100 ), comprising an edge bow ( 1 ) according to claim 16. Wind energy plant ( 100 ) with a rotor blade according to one of claims 1 to 10 or 17. Method for producing an edge bend ( 1 ) according to claim 16.

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