Method for testing a rotor blade component of a rotor blade for a wind energy installation and rotor blade component

Abstract

The invention relates to a method for testing a rotor blade component of a rotor blade for a wind energy plant, comprising: dividing a rotor blade component of a rotor blade for a wind energy plant into two, three or more rotor blade component sections; introducing a recess into a connection interface at a connection end of one of the rotor blade component sections. Furthermore, the invention relates to a rotor blade component section of a rotor blade for a wind energy plant, the rotor blade component section comprising: a connection end, which is produced by dividing a rotor blade component of a rotor blade for a wind energy plant into two, three or more rotor blade component sections; a connection interface at the connection end of the rotor blade component section; a recess introduced into the connection interface for connecting the rotor blade component to a test station.

Description

Technical Field

[0001] The invention relates to a method for testing a rotor blade component for a rotor blade of a wind power plant and to a rotor blade component section for a rotor blade of a wind power plant. Background Art

[0002] During the development of rotor blades for wind energy installations, in particular within the scope of certification methods, the rotor blades are typically subjected to static and dynamic tests. In such tests, the rotor blades are arranged in a test station and fixed at the blade root of the rotor blade. The dynamic test is then carried out by applying periodic forces along the rotor blade, usually at one position or at a plurality of positions. Thus, the rotor blade can be excited to form natural frequency oscillations, for example, in that the periodic application of forces is carried out at a frequency corresponding to the natural frequency of the rotor blade. In order to test the fatigue properties of the rotor blade in a fatigue test, such periodic application of forces is usually carried out, wherein the rotor blade is excited at the natural frequency of the rotor blade in order to set the rotor blade to natural frequency oscillations.

[0003] In order to improve the efficiency and cost of wind energy installations, it is recognized that the installations have a trend of increasingly larger construction shapes and / or higher rated power. The larger construction shapes relate in particular to the rotor diameter and hub height of the wind energy installation. The rotor blades of modern wind energy installations can have a length of more than 100 meters.

[0004] The testing of rotor blades, in particular the periodic testing, is generally very time-consuming and cost-intensive. This applies in particular to very long rotor blades. Another problem that arises when testing rotor blades is that the loads on some sections of the rotor blade can be significantly higher than the loads required for these sections. This can lead to damage to the rotor blades, which results in time-consuming and cost-intensive repair work and associated interruptions to the testing.

[0005] The German Patent and Trademark Office found the following prior art in the priority application of the present application: EP 3 418 560 A1. Summary of the invention

[0006] Therefore, the object of the present invention is to provide an improved solution which addresses at least one of the problems mentioned. In particular, the object of the present invention is to provide a solution which reduces the time and cost expenditure when dynamically testing rotor blades for wind energy installations.

[0007] According to a first aspect, the object mentioned at the outset is achieved by a method for testing a rotor blade component of a rotor blade for a wind power plant, comprising: dividing the rotor blade component of a rotor blade for a wind power plant into two, three or more rotor blade component sections; introducing a recess into a connection interface on a connection end of one of the rotor blade component sections.

[0008] Preferably, before the recess is introduced into the connecting interface, the rotor blade component of a rotor blade for a wind power plant is divided into two, three or more rotor blade component sections.

[0009] The rotor blade usually extends with its main extension direction along the longitudinal axis from the rotor blade root to the rotor blade tip. The division of the rotor blade parts, for example the rotor blades, is preferably carried out by sawing with a wire saw or a circular saw. The division of the rotor blade parts is preferably carried out along a plane arranged perpendicularly to the longitudinal axis of the rotor blade and / or the rotor blade part section and / or the rotor blade section and / or the rotor blade root.

[0010] The connection interface is preferably located in a plane to which the rotor blade and / or the rotor blade component segment and / or the longitudinal axis of the rotor blade segment is oriented substantially perpendicularly. The connection interface is preferably provided at a connection end of one of the rotor blade component segments.

[0011] The connection interface can be formed partially or completely by one of the rotor blade component segments, in particular by a part of one of the rotor blade component segments. In particular, the connection interface can be one of the rotor blade component segments, in particular an end plane of the rotor blade segment. The connection interface can be formed in particular partially or completely by a separating surface of one of the rotor blade component segments, along which the rotor blade component is divided. The connection interface can be formed in particular partially or completely by an end plane in the region of a beam cap of one of the rotor blade component segments.

[0012] The connection interface can also be applied, in particular partially or completely, to a connection end of one of the rotor blade component segments, wherein the connection interface is preferably applied such that it is arranged inside and / or outside the connection end transversely to the longitudinal axis of the rotor blade and / or rotor blade component segment and / or rotor blade segment.

[0013] The recesses are preferably each substantially cylindrical. Furthermore, each recess preferably has a substantially cylindrical barrel with a first diameter and an enlarged head with a second diameter adjoining the opening, wherein the second diameter is greater than the first diameter. In the longitudinal direction of the recess, the barrel is preferably longer than the head, in particular several times longer than the head. Preferably, the longitudinal axis of each recess is substantially parallel to the longitudinal axis of the rotor blade.

[0014] Another preferred improvement is characterized in that the connection interface has a plurality of recesses, preferably at least 20 or at least 30 or at least 40 recesses. A plurality of recesses can be arranged in a single row or in multiple rows, in particular in two rows. It is particularly preferred that the recesses are located on the circumferential line of the polygon or on two, three or more substantially concentric polygons. Preferably, the polygon preferably has the shape of the cross-sectional shape and / or the outer contour of the rotor blade component section at the connecting end. The recesses can also be located on an elliptical trajectory or on multiple elliptical trajectories. It is also preferred that the recesses are arranged substantially equidistantly in the circumferential direction.

[0015] A first advantage of this method is that the time required for testing a rotor blade can be significantly reduced if, instead of testing an undivided rotor blade, a plurality of rotor blade component segments, in particular rotor blade segments, are tested separately from one another. Compared to an undivided rotor blade, a rotor blade segment generally has a changed natural frequency, so that the rotor blade segment can be excited to form an oscillation with a higher frequency. As a result, a certain number of cycles can be achieved in a shorter time in a fatigue test, whereby the overall test time can be reduced. The described method can reduce the time required for a test by several months.

[0016] A further advantage is that by using a connection interface at the connection end of one of the rotor blade component segments and by introducing a recess into the connection interface, a cost-effective, relatively quickly producible and reliable connection can be provided for fastening to a test station.

[0017] A further advantage is that, in comparison with testing of the entire rotor blade, when testing rotor blade component segments, overloads above the loads required for these parts can be significantly reduced on some sections. Damages caused by overloads can thus be reduced and / or avoided during the test, whereby test interruptions and complex repair work on the rotor blade can be reduced and / or avoided. For example, in conventional rotor blade testing on the entire blade, loads higher than the required loads by a factor of 10 occur due to method-related overloads at specific locations, whereas when testing rotor blade component segments, in particular rotor blade segments, for example, loads only 3.5 times the required loads occur.

[0018] Another advantage is that, in the event of an interruption in the testing of one of the rotor blade component segments, the testing of the other rotor blade component segments that are being performed simultaneously does not have to be interrupted, which also has a positive effect on the overall time required for the test.

[0019] According to a preferred embodiment, it is provided that the rotor blade component is a rotor blade or a trailing edge of a rotor blade or an end edge of a rotor blade.

[0020] Preferably, the rotor blade component is a complete rotor blade. The rotor blade component section can be a rotor blade segment. The rotor blade segment is in particular a section of a rotor blade. For example, the rotor blade can be divided into two or three rotor blade sections and can be divided into further rotor blade component sections. In a preferred embodiment, the connection interface can be applied to the connection end of the rotor blade component section, which can be a section of the rotor blade.

[0021] The rotor blade component may also be the trailing edge of the rotor blade. When the rotor blade moves as intended, the trailing edge of the rotor blade points substantially in a direction opposite to the direction of movement, i.e. the direction of rotation of the rotor blade, and thus opposite to the direction of movement of the aerodynamic rotor. In a preferred embodiment, the connection interface may be applied to a connection end of a rotor blade component section, which connection end may be a part of the trailing edge.

[0022] The rotor blade component can also be an end edge of the rotor blade. The end edge of the rotor blade is preferably arranged on the rotor blade in the region of the trailing edge, for example from the central region of the rotor blade to the rotor blade tip. Such an end edge can be designed as a three-dimensional glass fiber reinforced element and / or comprise rotor blade material or consist of rotor blade material. In a preferred embodiment, the connection interface can be applied to the connection end of the rotor blade component section, which can be part of the end edge.

[0023] It is also preferred that the method comprises: applying a connection interface to the connection end, and / or manufacturing a rotor blade component for a rotor blade of a wind energy facility, and / or arranging connecting elements and / or tension elements in some or all of the recesses, and / or transporting rotor blade component sections to a testing station, and / or connecting rotor blade component sections to a testing station, and / or testing rotor blade component sections at a testing station, and / or removing rotor blade component sections from the testing station, and / or removing rotor blade component sections.

[0024] Preferably, after the connection interface has been applied to the connection end of one of the rotor blade component segments, a part of the connection interface and a part of the connection end are separated, preferably by sawing with a wire saw or a circular saw, so that the connection interface and the connection end have edges which are arranged in a plane arranged essentially transversely to the longitudinal axis of the rotor blade. Preferably, the edge of the connection interface and the edge of the connection end are formed by a common sawing profile. Preferably, the connection interface is connected to the rotor blade component segment in a materially bonded manner after the connection interface has been applied to the connection end.

[0025] By means of a connection interface which is applied to one of the rotor blade component segments and is designed as described, it is advantageously possible to connect the rotor blade component segment to the test station. Such a connection interface can be applied to the rotor blade component segment independently of the shape and / or contour of the rotor blade component segment. Such a connection interface can be applied to the rotor blade component segment independently of the shape and / or contour of the connecting end of the rotor blade component segment.

[0026] Preferably, manufacturing a rotor blade component of a rotor blade for a wind energy installation comprises manufacturing a rotor blade.Manufacturing a rotor blade component of a rotor blade may also comprise manufacturing a trailing edge and / or an end edge.

[0027] Preferably, a connecting element and / or a tension element is accommodated in each recess. The tension element accommodated in the recess preferably has an external thread, wherein the internal thread of the recess and the external thread of the tension element are preferably designed to engage with each other. Preferably, the tension element comprises steel or consists thereof. Preferably, the tension element accommodated in one of the recesses is connected with its end protruding from the recess in the test station for fixing the rotor blade component segment to the test station.

[0028] Preferably, a compensating plate is arranged between the rotor blade component segment and the test station to which the rotor blade component segment is connected. The compensating plate can compensate for unevenness on the end face of the rotor blade component segment, so that a reliable connection can be established between the test station and the rotor blade component segment. One or more compensating plates can be used. Preferably, compensating plates of different thicknesses are used so that all unevennesses are compensated.

[0029] Preferably, a number of tension elements is provided that corresponds to the number of recesses, wherein preferably a tension element is arranged or can be arranged in each recess. In another preferred embodiment, it is proposed that the tension element is bonded into the recess. It is particularly preferred that the tension element is screwed and bonded into the recess. For this purpose, an adhesive is introduced into the recess before the tension element is introduced into the recess. As adhesive, a thin adhesive and / or an adhesive based on epoxy resin and / or polyurethane and / or methyl acrylate is preferably used.

[0030] In another preferred embodiment, it is proposed that the rotor blade component section and / or the connecting material have a rigidity which is lower than the material rigidity of the tension element, is many times lower than it, preferably is at least five times lower than it, for example is at least seven times lower than it, wherein in particular the elastic modulus and / or shear modulus of the corresponding material is used as a quantitative value for the rigidity.

[0031] Preferably, the method steps are performed in the following sequence: manufacturing rotor blade components for rotor blades of a wind energy facility; applying a connection interface to the connection end; arranging connecting elements and / or tension elements in some or all recesses; transporting rotor blade component sections to a testing station; connecting the rotor blade component sections to the testing station; testing the rotor blade component sections at the testing station; and removing the rotor blade component sections from the testing station.

[0032] In a preferred embodiment, it is proposed that some or all of the recesses are constructed identically, and / or some or all of the recesses are constructed for accommodating connecting elements and / or tension elements for connecting the rotor blade component segment to a test station, and / or the corresponding circumferential surfaces of some or all of the recesses are formed by a connecting material, and / or some or all of the recesses are constructed as blind holes, and / or some or all of the recesses are constructed as through holes, and / or the corresponding circumferential surfaces of some or all of the recesses have an internal thread, and / or some or all of the recesses are constructed as drilled holes, and / or some or all of the recesses are equidistantly spaced from one another.

[0033] Preferably, the recesses have the same diameter and the same length. It is also preferred that the connecting element and / or the tension element is connected to the recess in a form-fitting and / or materially bonding manner and to the test station in a form-fitting and / or materially bonding manner. Preferably, the recess is designed as a blind hole, wherein the opening is located in the end face of the connection interface. One advantage is that no sleeve is required in the recess for force transmission between the connecting element and the connection interface.

[0034] In a preferred embodiment, it is proposed that the connecting interface includes a connecting material or consists of it, and / or the application of the connecting interface is a lamination of the connecting material or includes a lamination of the connecting material, and / or the first end of the connecting interface is flush with the connecting end of the rotor blade component section, and / or the second end of the connecting interface is spaced apart from the end of the rotor blade component section opposite to the connecting end of the rotor blade component section, and / or the first and second ends of the connecting interface are parallel to each other.

[0035] Preferably, the rotor blade component section comprises rotor blade material or consists essentially of rotor blade material. It is also preferred that the connection interface comprises connection material or consists essentially of connection material. In a preferred embodiment, it is provided that the rotor blade material and the connection material are identical. The connection material is preferably used as a thickening and / or reinforcement at the connection end. The connection interface and / or other parts of the rotor blade component section can preferably consist completely or predominantly of connection material and / or rotor blade material.

[0036] Lamination of the connecting material is understood in particular to mean the application of the connecting material by means of lamination, wherein preferably multiple layers of fiber-plastic composite material are applied.

[0037] A preferred improvement is characterized in that the connecting material is a fiber-reinforced composite material, in particular a fiber-plastic composite material, preferably a glass-fiber-reinforced epoxy resin composite material, or comprises such a material, and / or the connecting material is the same as the material of the rotor blade component and / or is reinforced relative to the material of the rotor blade component, and / or the connecting interface is arranged on the inner and / or outer side of the connecting end of the rotor blade component section, and / or the connecting interface extends over a large part of the connecting end of the rotor blade component section or over the entire inner circumference and / or outer circumference.

[0038] As the fiber material of the fiber-reinforced composite material, organic fibers and / or inorganic fibers and / or natural fibers can be preferably used. Inorganic fibers are, for example, glass fibers, basalt fibers, boron fibers, ceramic fibers or steel fibers. Organic fibers are, for example, aramid fibers, carbon fibers, polyester fibers and polyethylene fibers (particularly high-performance polyethylene (HPPE) fibers, such as Dyneema fibers). Natural fibers are, for example, hemp fibers, flax fibers or sisal fibers.

[0039] Preferably, the matrix material of the fiber-reinforced composite material comprises or consists of plastic. The plastic preferably comprises or consists of thermoplastics and / or thermosetting plastics. For example, particularly preferably, thermosetting plastics such as polyester resin (UP) and / or epoxy resin and / or thermoplastics such as polyamide. The matrix material of the fiber-reinforced composite material may also comprise or consist of cement and / or concrete and / or metal and / or ceramic and / or carbon.

[0040] Another preferred improvement is characterized in that a further rotor blade component segment or all further rotor blade component segments of the same rotor blade component are transported to the testing station; and / or a further rotor blade component segment or all further rotor blade component segments of the same rotor blade component are connected to the testing station; and / or a further rotor blade component segment or all further rotor blade component segments of the same rotor blade component segment are tested at the testing station; and / or a further rotor blade component segment or all further rotor blade component segments of the same rotor blade component segment are removed from the testing station.

[0041] Preferably, a plurality of rotor blade component sections of the same rotor blade component are connected to the test station and / or tested simultaneously. As a result, the testing of the rotor blade component can advantageously be carried out in a relatively short time.

[0042] It is particularly preferred that a flat surface is manufactured on the end face of the connection interface in the region of the opening of the recess, preferably by means of drilling and / or plane milling. Preferably, the flat surface is substantially located in a common plane. However, it may also be preferred that the flat surface is located on two or more different planes. This has the advantage that when manufacturing the flat surface, it is not necessary to consider that these surfaces are in a common plane. More precisely, a flat surface can be produced in the region of each opening of the recess, and the flat surface is located in a plane that is different, but preferably parallel to one or more flat surfaces in the region of one or more other openings of the recess. By providing a spacer and / or filler with different thicknesses, it can be ensured that the side of the spacer and / or filler provided for the purpose of being arranged on the test station is substantially located in a common plane, so that, for example, a steel adapter can be well connected. Preferably, the distance between the flat surface and the common reference plane is determined and the thickness of the spacer and / or filler is matched to the measured distance.

[0043] It is also preferred that the spacer blocks are arranged on an end face, in particular a manufactured flat face, of the connection interface in the region of the opening of the recess. Preferably, the spacer blocks have different thicknesses from one another.

[0044] It is also preferred that a filler is applied and / or arranged on the end face of the connection interface in the region of the opening of the recess, in particular on a manufactured flat surface. With the aid of such a filler, unevenness can be advantageously compensated and avoided.

[0045] Preferably, the connecting element and / or the tension element is arranged in a borehole, preferably in a through hole, of the steel adapter. Preferably, the connecting element and / or the tension element is tightened and / or tensioned against the steel adapter by means of tightening, in particular by means of a nut arranged on the connecting element and / or the tension element.

[0046] A further preferred development is characterized in that a further rotor blade part section or all further rotor blade part sections of the same rotor blade part are removed.

[0047] Removing may include shredding the rotor blade component segments.

[0048] In a preferred embodiment, it is proposed that the connection interface has a thickness corresponding to at least 1.5 times the diameter of some or all of the recesses, in particular corresponding to at least 2 times, at least 2.5 times or at least 3 times the diameter of some or all of the recesses, and / or the connection interface has a thickness of at least 2 cm, preferably at least 3 cm, at least 4 cm, at least 5 cm, at least 6 cm, at least 7 cm, at least 8 cm, at least 9 cm, at least 10 cm, at least 11 cm, at least 12 cm, or at least 15 cm, and / or the connection interface has a depth corresponding to at least 2 times the diameter of some or all of the recesses, in particular corresponding to at least 3 times, at least 6 times or at least 12 times the diameter of some or all of the recesses, and / or the connection interface has a depth of at least 10 cm, preferably at least 15 cm, at least 20 cm, at least 25 cm, at least 30 cm, at least 35 cm, at least 40 cm, at least 45 cm, or at least 50 cm.

[0049] The thickness of the connection interface is understood to be the extent of the connection interface in the thickness direction, wherein the thickness direction is preferably oriented perpendicularly to the longitudinal axis of the rotor blade component segment and / or perpendicularly to the longitudinal axis of the rotor blade segment and / or the rotor blade longitudinal axis. The depth of the connection interface is understood to be the extent of the connection interface in the longitudinal direction, wherein the longitudinal direction is preferably oriented parallel to the longitudinal axis of the rotor blade component segment and / or the longitudinal axis of the rotor blade segment and / or the rotor blade longitudinal axis.

[0050] According to a further aspect of the invention, the object mentioned at the outset is achieved by a rotor blade component segment for a rotor blade for a wind energy installation, the rotor blade component segment comprising: a connecting end, which is produced by dividing the rotor blade component of the rotor blade for a wind energy installation into two, three or more rotor blade component segments; a connecting interface on the connecting end of the rotor blade component segment; a recess introduced into the connecting interface for connecting the rotor blade component segment to a test station.

[0051] The further aspects described above and possible developments thereof have the following features and method steps, which are particularly suitable for use in the method described here and its developments.

[0052] With regard to the advantages, implementation variants and implementation details of the various aspects of the solution described here and the corresponding possible developments thereof, reference is also made to the description of the corresponding other aspects and their developments with regard to the corresponding features, details and advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Preferred embodiments are described by way of example with reference to the accompanying drawings. The drawings show:

[0054] Figure 1 A schematic diagram showing a wind energy facility;

[0055] Figure 2 A schematic diagram of a rotor blade component segment in the form of a rotor blade segment having a connection interface is shown;

[0056] Figure 3a A cross-sectional view showing a portion of a connection interface at a connection end, wherein a compensating plate is mounted on the connection interface;

[0057] Figure 3b A sectional view showing a part of a connection interface at a connection end, wherein a compensation layer is applied to the connection interface;

[0058] Figure 3c A sectional view showing a detail of a connection interface at a connection end, wherein a compensating disk is attached to the connection interface and the connection interface is formed by a rotor blade component segment;

[0059] Figure 3d A sectional view showing a detail of a connection interface at a connection end, wherein a compensation layer is applied to the connection interface and the connection interface is formed by a rotor blade component segment;

[0060] Figure 4a A partial cross-sectional view showing a connection interface at a connection end;

[0061] Figure 4b A sectional view showing a detail of a connection interface at a connection end, wherein the connection interface is formed by a rotor blade component segment;

[0062] Figure 5a A schematic diagram of a rotor blade component segment in the form of a rotor blade segment having a connection interface applied to the inner side of the rotor blade component segment;

[0063] Figure 5b A schematic diagram of a rotor blade component section in the form of a rotor blade segment having a connection interface applied to the outer side of the rotor blade component section;

[0064] Figure 5c A schematic diagram of a rotor blade component section in the form of a rotor blade section having connection interfaces applied on the outer side and the inner side of the rotor blade component section;

[0065] Figure 6 A schematic plan view of an edge of a rotor blade component section is shown, the rotor blade component section having connection interfaces applied on the inner side and the outer side of the rotor blade component section;

[0066] Figure 7 A schematic diagram showing an example of a method for testing a rotor blade component of a rotor blade for a wind energy installation;

[0067] Figure 8 A schematic diagram shows a further example of a method for testing a rotor blade component of a rotor blade for a wind energy installation.

[0068] In the figures, identical or functionally substantially identical elements are provided with the same reference symbols.The general description generally relates to all embodiments, unless differences are explicitly stated. DETAILED DESCRIPTION

[0069] Figure 1 The schematic diagram of a wind power plant according to the invention is shown. The wind power plant 100 has a tower 102 and a nacelle 104 on the tower 102. An aerodynamic rotor 106 is arranged on the nacelle 104, which has three rotor blades 108 and a spinner 110. The aerodynamic rotor 106 is set into rotational motion by the wind during the operation of the wind power plant, thereby also rotating the impeller of the electric rotor or generator, which is directly or indirectly coupled to the aerodynamic rotor 106. The generator is arranged in the nacelle 104 and generates electrical energy. The pitch angle of the rotor blades 108 can be changed by a pitch motor on the rotor blade root 109 of the corresponding rotor blade 108.

[0070] Figure 2 A schematic diagram of a rotor blade segment 250 is shown with a connection interface 210, which has a plurality of recesses 211, into which tension elements 220 are respectively introduced. The outer circumferential surface of the respective recess 211 is formed by a connecting material. The opening of the recess 211 is located in the end face 212b of the connection interface 210. The end face 212b of the connection interface is applied to the outer side of the connection end of the rotor blade segment 250. The connection end of the rotor blade segment 250 has an end face 260, which is located in a plane with the end face 212b of the connection interface 210. The diameter of the recess 211 preferably corresponds approximately to the extension D of the connection interface 210 perpendicular to the longitudinal axis of the recess 211 and / or of the rotor blade segment 250. F one third, preferably about 10% to 50%, especially about 20% to 40%.

[0071] Figure 3a A schematic longitudinal section through a recess 311 of a connection interface 310 is shown, which has an introduced tensile element 320 with a diameter D and a total length consisting of the length L of the part accommodated in the recess 311 B1 and the length L of the portion extending from the recess 311 B2 The outer circumferential surface of the recess 311 is formed by the connecting material. The recess 311 is configured as a blind hole, and the opening is located in the end face 312 of the connecting interface 310. The adhesive 330 is introduced into the recess. The recess 311 is configured substantially cylindrically and has a substantially cylindrical first diameter DB The cylindrical portion 311a and the second diameter D adjacent to the opening E The enlarged head 311b, wherein the second diameter D E Greater than the first diameter D B The length of the cylindrical portion 311a along the longitudinal direction of the recess is L E In general, the concave portion 311 has a basic length L G and the total length L B The longitudinal extension of the recess 311 along the longitudinal axis is greater than the length L of the portion of the tension element 320 to be accommodated in the recess. B1 is longer and corresponds to the diameter D of the recess 311 B several times. Diameter D of recess 311 B Preferably, it corresponds approximately to the extent D of the connecting interface 310 perpendicular to the longitudinal axis of the recess 311 and / or perpendicular to the longitudinal axis of the rotor blade part section 350 . F one third, preferably about 10% to 50%, especially about 20% to 40%.

[0072] In the embodiment shown, the connection interface 310 is applied to the connection end of the rotor blade component section 350, which can be a rotor blade section. The rotor blade component section 350 has an end face 360, which can be flush with the end face 312 of the connection interface 310. The end face 312 of the connection interface 310 is removed flatly in the area around the recess by means of a milling cutter or by means of a drill, so that the end face 312 has a flat surface. The end face 312 serves as a bearing surface for the spacer block 340. The spacer block 340 rests on the end face 312 on one side and on the opposite side on the steel adapter 380. The steel adapter 380 can already be part of a test station, on which the rotor blade component section 350 is connected via the connection interface 310. The steel adapter has a through hole for the tension element 320, in which the tension element 320 is arranged. The tension element 320 is tightened against the steel adapter 380 by means of a washer 381 and a nut 382 , which is arranged on the thread of the tension element 320 .

[0073] Preferably, all tension elements are screwed in this way to the steel adapter 380. In this case, a plurality of spacers 340 can be used, which can have different thicknesses, wherein the thickness can be selected so that the end faces of the spacers 340 connected to the steel adapter 380 are in a common plane.

[0074] In the embodiment shown, the connection interface 310 can be applied from the inside or from the outside to the connection end of the rotor blade part segment 350. In the embodiment shown, the connection interface 310 can thus be applied on the inside or on the outside to the connection end of the rotor blade part segment 350.

[0075] Embodiments with multiple rows of connections may also be preferred. Embodiments with connection interfaces arranged on the inside and outside of the connection ends of the rotor blade part segments may also be preferred. Furthermore, embodiments with connection interfaces formed at least partially by the rotor blade part segments, preferably by the beam caps of the rotor blade part segments may also be preferred.

[0076] The tension element 320 received in the recess 311 has an external thread, wherein the internal thread of the recess 311 and the external thread of the tension element 320 are designed to engage with each other.

[0077] Figure 3b A schematic longitudinal section through a recess 311 in a connection interface 310 is shown, which has an introduced tension element 320 having a diameter D and an overall length which is composed of the length L of the part accommodated in the recess 311. B1 and the length L of the portion extending from the recess 311 B2 The outer circumferential surface of the recess 311 is formed by the connecting material. The recess 311 is configured as a blind hole, and the opening is located in the end face 312 of the connecting interface 310. The adhesive 330 is introduced into the recess. The recess 311 is configured substantially cylindrically and has a substantially cylindrical first diameter D B The cylindrical portion 311a and the second diameter D adjacent to the opening E The enlarged head 311b, wherein the second diameter D E Greater than the first diameter D B The length of the cylindrical portion 311a along the longitudinal direction of the recess is L E In general, the concave portion 311 has a basic length L G and the total length L B The longitudinal extension of the recess 311 along the longitudinal axis is greater than the length L of the portion of the tension element 320 to be accommodated in the recess. B1 is longer and corresponds to the diameter D of the recess 311 B several times. Diameter D of recess 311 B Preferably, it corresponds approximately to the extent D of the connecting interface 310 perpendicular to the longitudinal axis of the recess 311 and / or perpendicular to the longitudinal axis of the rotor blade part section 350 . F one third, preferably about 10% to 50%, especially about 20% to 40%.

[0078] In the exemplary embodiment shown, the connection interface 310 is applied to a connection end of a rotor blade component section 350 , which may be a rotor blade section. The rotor blade component section 350 has an end face 360 ​​, which may be flush with the end face 312 of the connection interface 310 .

[0079] A filler 345 is applied to the end face 312 of the connection interface 310. Preferably, the filler 345 comprises epoxy resin or consists essentially of it. A steel adapter 380 is arranged on the filler 345. The steel adapter 380 can already be part of a test station, to which the rotor blade component section 350 is to be connected via the connection interface 310. The steel adapter 380 has a through-hole for the tension element 320, in which the tension element 320 is arranged. The tension element 320 is tightened against the steel adapter 380 by means of a washer 381 and a nut 382, ​​which are arranged on the thread of the tension element 320. In particular, unevenness of the end face 312 can be compensated by means of the filler 345.

[0080] Preferably, all tension elements are screwed to the steel adapter 380 in this way. In this case, the filler 345 can be applied around all tension elements. The filler can have different thicknesses at different locations, wherein the thickness can be selected so that the filler 345 forms a plane on the side where the filler 345 is connected to the steel adapter 380.

[0081] The connection interface 310 can be applied in particular from the inside or from the outside to the connection end of the rotor blade part section 350 . Thus, in the embodiment shown, the connection interface 310 can be applied on the inside or on the outside of the connection end of the rotor blade part section 350 .

[0082] Embodiments with multiple rows of connecting elements may also be preferred. Embodiments with connecting interfaces arranged on the inner side and on the outer side of the connecting end of the rotor blade part segment may also be preferred. Furthermore, embodiments with connecting interfaces formed at least partially by the rotor blade part segment, preferably by the beam cap of the rotor blade part segment may also be preferred.

[0083] The tension element 320 received in the recess 311 has an external thread, wherein the internal thread of the recess 311 and the external thread of the tension element 320 are designed to engage with each other.

[0084] Figure 3c A partial cross-sectional view of the connection interface 310' at the connection end is shown, wherein Figure 3a The steel adapter 380 is installed on the connection interface 310'. Figure 3a Unlike the embodiment shown in Figure 3c In the embodiment shown in FIG. 3 , the connection interface 310 ′ is formed by a rotor blade component segment 350 ′. The recess 311 ′ is provided in the beam cap of the rotor blade component segment 350 ′. The tension element 320 is accommodated in the recess 311 ′ of the beam cap. The remaining construction is similar to that in FIG. Figure 3a The construction of the embodiment shown in FIG.

[0085] Figure 3d A partial cross-sectional view of the connection interface 310' at the connection end is shown, wherein Figure 3b The steel adapter 380 is installed on the connection interface 310'. Figure 3b Unlike the embodiment shown in Figure 3d In the embodiment shown in FIG. 3 , the connection interface 310 ′ is formed by a rotor blade component segment 350 ′. A recess 311 ′ is provided in the beam cap of the rotor blade component segment 350 ′. The tension element 320 is accommodated in the recess 311 ′ in the beam cap. The remaining construction is similar to that in FIG. Figure 3b The construction of the embodiment shown in FIG.

[0086] Figure 4a A schematic longitudinal section of a recess 411 extending through a connection interface 410 is shown. The outer circumferential surface of the recess 411 is formed by the connection material. The recess 411 is designed as a blind hole, the opening of which is located in the end face 412 of the connection interface 410. The recess 411 is designed substantially cylindrically and has a substantially cylindrical first diameter D B The cylindrical portion 411a and the second diameter D adjacent to the opening E The enlarged head 411b, wherein the second diameter D E Greater than the first diameter D B A transition section 411c is formed between the enlarged head 411b and the barrel 411a, which preferably has an inclination angle α of 30° to 60°, in particular 45°. An end section 411d is formed at the closed end of the blind hole, which preferably has an inclination angle β of 60° to 120°. The barrel 411a has an internal thread 413, which is cut directly into the connection material.

[0087] Along the longitudinal direction of the recess, it has a length L V The cylindrical portion 411a has a length L E The head 411b is longer, being several times longer. The longitudinal extension of the recess 411 along the longitudinal axis corresponds to the diameter D of the recess 411. B several times. Diameter D of recess 411 B Preferably, it corresponds approximately to the extent D of the connecting interface 410 perpendicular to the longitudinal axis of the recess 411 and / or the longitudinal axis of the rotor blade. Fabout one third of the total weight, preferably about 10% to 50%, in particular about 20% to 40%.

[0088] In the embodiment shown, the connection interface 410 is applied to the connection end of the rotor blade component section 450, which can be a rotor blade section. The rotor blade component section 450 has an end face, which is arranged flush with the end face 412 of the connection interface 410. The connection interface 410 can be applied to the connection end of the rotor blade component section 450 from the inside and the outside. Thus, in the embodiment shown, the connection interface 410 can be applied on the inside and the outside of the connection end of the rotor blade component section 450.

[0089] The connection interface 210 , 310 , 410 preferably comprises a connection material which is the same as the rotor blade material. It is also preferred that the connection interface 210 , 310 , 410 is connected to the rotor blade component section in a materially bonded manner.

[0090] Via the connection interfaces 210 , 310 , 410 , the rotor blade component segments can each be fastened to a testing station by means of connection elements and / or tension elements for testing the rotor blade component segments.

[0091] Preferably, the diameter D E Approximately diameter D B Preferably, the length L E Preferably, the diameter D is approximately B 1.5 times of the length L. V Approximately diameter D B 6 times.

[0092] Figure 4b A schematic longitudinal section through the recess 411' in the connection interface 410' is shown. Figure 4a Unlike the embodiment shown in Figure 4b In the embodiment shown in FIG. 4 , the connection interface 410 ′ is formed by a rotor blade component segment 450 ′. The recess 411 ′ is arranged in the beam cap of the rotor blade component segment 450 ′. The remaining construction is similar to that in FIG. Figure 4a The embodiment shown in FIG.

[0093] Figure 5a A rotor blade segment 550 is shown with a connection interface 510a applied to the connection end of the rotor blade segment 550. The connection interface 510a is arranged on the inner side of the connection end of the rotor blade segment 550. The connection interface has an end face 512a which is flush with the end face of the connection end of the rotor blade segment 550.

[0094] Figure 5bA rotor blade segment 550 is shown with a connection interface 510b applied to the connection end of the rotor blade segment 550. The connection interface 510b is arranged on the outer side of the connection end of the rotor blade segment 550. The connection interface has an end face 512b which is flush with the end face of the connection end of the rotor blade segment 550.

[0095] Figure 5c A rotor blade segment 550 is shown with connection interfaces 510, 510b applied to the connection end of the rotor blade segment 550. The connection interfaces 510a, 510b are arranged on the inside and outside of the connection end of the rotor blade segment 550. The connection interface has end faces 512a, 512b which are flush with the end faces of the connection end of the rotor blade segment 550.

[0096] Via the connection interfaces 510a , 510b , the rotor blade segment can be fastened to a testing station by means of connection elements and / or tension elements for testing the rotor blade segment.

[0097] Figure 6 A top view of a connection interface 610 of a rotor blade segment is shown. The connection interface 610 is applied to the connection end of the rotor blade segment from the inside and the outside. The connection interface 610 thus comprises an end face 612a of a portion applied on the inside together with a portion applied on the inside and an end face 612b of a portion applied on the outside together with a portion applied on the outside. The end faces 612a, 612b of the connection interface are flush with the end face of the connection end of the rotor blade segment. The recesses 611a, 611b on the connection interface 610 are formed in two rows. The connection interface 610 has an internal recess 611a and an external recess 611b. Via the connection interface 610, the rotor blade segment can be connected to a test station by means of a connecting element and / or a tension element.

[0098] Figure 7A method 700 for testing a rotor blade component for a rotor blade of a wind energy facility is shown. The method 700 comprises the following steps: In step 701, a rotor blade component for a rotor blade of a wind energy facility is manufactured. In step 702, the rotor blade component for a rotor blade of a wind energy facility is divided into two, three or more rotor blade component sections. In step 703, a connection interface is applied to the connection end of one of the rotor blade component sections. In step 704, a recess is introduced into the connection interface on the connection end and a flat section is preferably produced on the end face of the connection interface in the region of the opening of the recess, preferably by means of drilling and / or face milling, and preferably a spacer is arranged on the end face in the region of the recess. Preferably, the spacer has an individually matched thickness so that the spacer can compensate for unevenness. In step 705, a connection element and / or a tension element is arranged in some or all recesses and preferably a filler is applied to the end face of the connection interface. The filler can include epoxy resin or essentially consist of it. In step 706, the rotor blade component segment is transported to the test station. In step 707, the rotor blade component segment is connected to the test station. In step 708, the rotor blade component segment is tested at the test station. In step 709, the rotor blade component segment is disassembled from the test station. In step 710, the rotor blade component segment is removed.

[0099] Figure 8 A schematic diagram of a method 700 for testing a rotor blade component of a rotor blade for a wind energy installation is shown. Figure 7 The method described in also comprises the additional steps: in step 711, a further rotor blade component segment or all further rotor blade component segments of the same rotor blade component are transported to the test station. In step 712, a further rotor blade component segment or all further rotor blade component segments of the same rotor blade component are connected to the test station. In step 713, a further rotor blade component segment or all further rotor blade component segments of the same rotor blade component are tested at the test station. In step 714, a further rotor blade component segment or all further rotor blade component segments of the same rotor blade component are removed from the test station. In step 715, a further rotor blade component segment or all further rotor blade component segments of the rotor blade component are removed.

[0100] Reference numerals list

[0101] 100 Wind energy facilities

[0102] 102 Tower

[0103] 104 Pod

[0104] 106 Rotor

[0105] 108 Rotor Blades

[0106] 109 Rotor blade root

[0107] 110 air deflector

[0108] 210, 310, 410, 510a, 510b, 610, 310', 410' connection interface

[0109] 211, 311, 411, 611a, 611b, 311', 411' recess

[0110] 212, 312, 412, 512a, 512b, 612a, 612b, 312', 412' End surface of the connection interface

[0111] 220, 320 tension element

[0112] 250, 550 rotor blade sections

[0113] 260, 360 End face of the connecting end of the rotor blade segment

[0114] 311a, 411a, 311a', 411a': concave tube

[0115] 311b, 411b, 311b', 411b' Head of the concave portion

[0116] 330, 330' adhesive

[0117] 340 Spacer Block

[0118] 345 Filler

[0119] 350, 450, 350', 450' rotor blade section

[0120] 380 Steel Adapter

[0121] 381 Gasket

[0122] 382 Nut

[0123] 411c, 411c' transition section of the recess

[0124] 411d, 411d' end section of the recess

[0125] 413, 413' internal thread

[0126] 700-715 Methods and Steps

[0127] D Diameter of the tension element

[0128] DF Extension of connection interface

[0129] D B First diameter

[0130] D E Second diameter

[0131] L B1 Length of the portion of the tension element received in the recess

[0132] L B2 Length of the portion of the tension element that protrudes from the recess

[0133] L E Length of the head of the recess

[0134] L G Basic length

[0135] L V Length of the concave tube

Claims

1. A method for testing a rotor blade component of a rotor blade for a wind energy installation, include: - dividing a rotor blade component of a rotor blade for a wind energy plant into two, three or more rotor blade component segments; - introducing a recess into the connecting interface at the connecting end of one of the rotor blade part segments, - testing the rotor blade component segment at a testing station, wherein a spacer is arranged on the end face of the connection interface in the region of the opening of the recess, and / or - applying a filler material to the end face of the connection interface in the region of the opening of the recess, It is characterized in that A flat surface is produced on the end face of the connection interface in the region of the opening of the recess, wherein the flat surfaces are located on two or more different planes, and In this case, the distance of the planar surface from a common reference plane is determined and the thickness of the spacer and / or of the filler compound is adapted to the measured distance.

2. The method according to the preceding claim, It is characterized in that The filler is applied to compensate for unevenness.

3. The method according to claim 1, It is characterized in that The spacer blocks have different thicknesses from one another.

4. The method according to any one of claims 1 to 3, It is characterized in that The flat surface is produced by means of drilling and / or face milling.

5. The method according to claim 1, It is characterized in that - the spacer block is arranged on a manufactured flat surface on the end face of the connection interface, and / or The filler material is applied to a manufactured flat surface on the end face of the connection interface.

6. The method according to any one of claims 1 to 3, It is characterized in that The rotor blade component is a rotor blade or a trailing edge of a rotor blade or an end edge of a rotor blade.

7. The method according to any one of claims 1 to 3, It is characterized in that - applying the connection interface to the connection end, and / or - Manufacturing of rotor blade components for rotor blades of wind energy plants.

8. The method according to any one of claims 1 to 3, It is characterized in that - some or all recesses are identically constructed, and / or Some or all recesses are designed for receiving connecting elements and / or tension elements for connecting the rotor blade component segment to a testing station.

9. The method according to any one of claims 1 to 3, It is characterized in that - the connection interface comprises a connection material or consists of a connection material, and / or The application of the connection interface is a lamination of a connection material or a lamination comprising a connection material.

10. The method according to claim 9, It is characterized in that - the connecting material is or includes a fiber-reinforced composite material, and / or The connecting material is the same as the material of the rotor blade component.

11. The method according to any one of claims 1 to 3, It is characterized in that - transporting a further rotor blade component segment or all further rotor blade component segments of the same rotor blade component to the testing station, and / or - Connecting a further rotor blade component segment or all further rotor blade component segments of the same rotor blade component to the test station.

12. The method according to any one of claims 1 to 3, It is characterized in that A further rotor blade part section or all further rotor blade part sections of the same rotor blade part are removed.

13. The method according to any one of claims 1 to 3, It is characterized in that - the connection interface has a thickness corresponding to at least 1.5 times the diameter of some or all recesses, and / or - The connection interface has a depth corresponding to at least 2 times the diameter of some or all recesses.

14. The method according to claim 1 or 2, It is characterized in that The spacer blocks have an individually adapted thickness, such that the spacer blocks can compensate for unevenness.

15. The method according to claim 1 or 2, It is characterized in that The spacer blocks have different thicknesses.

16. The method according to claim 15, It is characterized in that The thickness is selected such that the end faces of the spacer blocks that can be connected to the steel adapter piece lie in a common plane.

17. The method according to claim 1 or 2, It is characterized in that The filler has different thicknesses at different locations.

18. The method according to claim 17, It is characterized in that The thickness is selected such that the filler material forms a flat surface on the side of the filler material that can be connected to the steel adapter.

19. The method according to claim 8, It is characterized in that - all recesses are designed as blind holes, or - all recesses are designed as through-holes, or All recesses are designed as bores.

20. The method according to claim 10, It is characterized in that The connecting material is or includes a fiber-plastic composite material.

21. The method according to claim 10, It is characterized in that The connecting material is or includes a glass fiber reinforced epoxy resin composite material.

22. The method according to claim 9, It is characterized in that The connecting material is reinforced relative to the material of the rotor blade component.

23. The method according to any one of claims 1 to 3, It is characterized in that The connection interface has a thickness corresponding to at least 2 times the diameter of some or all recesses.

24. The method according to any one of claims 1 to 3, It is characterized in that The connection interface has a thickness corresponding to at least 2.5 times the diameter of some or all recesses.

25. The method according to any one of claims 1 to 3, It is characterized in that The connection interface has a thickness corresponding to at least 3 times the diameter of some or all recesses.

26. The method according to any one of claims 1 to 3, It is characterized in that The connection interface has a thickness of at least 2 cm.

27. The method according to any one of claims 1 to 3, It is characterized in that The connection interface has a thickness of at least 3 cm.

28. The method according to any one of claims 1 to 3, characterized in that The connection interface has a thickness of at least 4 cm.

29. The method according to any one of claims 1 to 3, characterized in that The connection interface has a thickness of at least 5 cm.

30. The method according to any one of claims 1 to 3, characterized in that The connection interface has a thickness of at least 6 cm.

31. The method according to any one of claims 1 to 3, characterized in that The connection interface has a thickness of at least 7 cm.

32. The method according to any one of claims 1 to 3, characterized in that The connection interface has a thickness of at least 8 cm.

33. The method according to any one of claims 1 to 3, characterized in that The connection interface has a thickness of at least 9 cm.

34. The method according to any one of claims 1 to 3, It is characterized in that The connection interface has a thickness of at least 10 cm.

35. The method according to any one of claims 1 to 3, It is characterized in that The connection interface has a thickness of at least 11 cm.

36. The method according to any one of claims 1 to 3, It is characterized in that The connection interface has a thickness of at least 12 cm.

37. The method according to any one of claims 1 to 3, It is characterized in that The connection interface has a thickness of at least 15 cm.

38. The method according to any one of claims 1 to 3, It is characterized in that The connection interface has a depth corresponding to at least 3 times the diameter of some or all recesses.

39. The method according to any one of claims 1 to 3, It is characterized in that The connection interface has a depth corresponding to at least 6 times the diameter of some or all recesses.

40. The method according to any one of claims 1 to 3, It is characterized in that The connection interface has a depth corresponding to at least 12 times the diameter of some or all of the recesses.

41. The method according to any one of claims 1 to 3, characterized in that The connection interface has a depth of at least 10 cm.

42. The method according to any one of claims 1 to 3, characterized in that The connection interface has a depth of at least 15 cm.

43. The method according to any one of claims 1 to 3, characterized in that The connection interface has a depth of at least 20 cm.

44. The method according to any one of claims 1 to 3, characterized in that The connection interface has a depth of at least 25 cm.

45. The method according to any one of claims 1 to 3, characterized in that The connection interface has a depth of at least 30 cm.

46. ​​The method according to any one of claims 1 to 3, characterized in that The connection interface has a depth of at least 35 cm.

47. The method according to any one of claims 1 to 3, characterized in that The connection interface has a depth of at least 40 cm.

48. The method according to any one of claims 1 to 3, It is characterized in that The connection interface has a depth of at least 45 cm.

49. The method according to any one of claims 1 to 3, It is characterized in that The connection interface has a depth of at least 50 cm.

50. The method according to any one of claims 1 to 3, It is characterized in that - placing connecting elements and / or tension elements in some or all of the recesses, and / or - Transporting the rotor blade component segment to a testing station.

51. The method according to any one of claims 1 to 3, It is characterized in that - connecting the rotor blade component segment to a testing station, and / or - Disassembling the rotor blade component segment from the testing station.

52. The method according to any one of claims 1 to 3, It is characterized in that The rotor blade component section is removed.

53. The method according to any one of claims 1 to 3, It is characterized in that - the corresponding circumferential surfaces of some or all of the recesses are formed from the connecting material, and / or Some of the recesses are designed as blind holes.

54. The method according to any one of claims 1 to 3, It is characterized in that some of the recesses are designed as through-holes, and / or The corresponding circumferential surface of some or all recesses has an internal thread.

55. The method according to any one of claims 1 to 3, It is characterized in that - some recesses are configured as bores, and / or - Some or all of the recesses are equidistant from each other.

56. The method according to any one of claims 1 to 3, It is characterized in that - the first end of the connection interface is flush with the connection end of the rotor blade part segment, and / or The second end of the connecting interface is spaced apart from the end of the rotor blade component segment which is opposite the connecting end of the rotor blade component segment.

57. The method according to claim 56, It is characterized in that The first end and the second end of the connection interface are parallel to each other.

58. The method according to claim 8, It is characterized in that The connection interface is arranged on the inner side and / or the outer side of the connection end of the rotor blade part segment, and / or The connection interface extends over a large part or over the entire inner circumference and / or outer circumference of the connection end of the rotor blade part segment.

59. The method according to any one of claims 1 to 3, It is characterized in that - testing a further rotor blade component segment or all further rotor blade component segments of the same rotor blade component at the testing station, and / or - removing a further rotor blade component segment or all further rotor blade component segments of the same rotor blade component from the test station.

60. A rotor blade component segment for a rotor blade of a wind energy installation, the rotor blade component segment comprising: a connecting end which is produced by dividing a rotor blade part of a rotor blade for a wind energy installation into two, three or more rotor blade part sections, a connection interface at the connection end of the rotor blade part segment, a recess introduced into the connection interface for connecting the rotor blade component segment to a test station, Wherein, a spacer block is arranged on the end face of the connection interface in the region of the opening of the recess, and / or A filler is applied to the end face of the connection interface in the region of the opening of the recess, It is characterized in that A flat surface is produced on the end face of the connection interface in the region of the opening of the recess, wherein the flat surfaces are located on two or more different planes, and In this case, the distance of the planar surface from a common reference plane is determined and the thickness of the spacer and / or of the filler compound is adapted to the measured distance.

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