阅读说明：本技术 用于制造风能设备转子叶片的方法 (Method for producing a rotor blade for a wind turbine ) 是由 弗洛里安·施特普斯 托尔斯滕·贝特格 于 2018-06-08 设计创作，主要内容包括：提出一种用于制造风能设备转子叶片的方法。提供用于梁缘条(400)的模具(300)。所述模具(300)具有至少一个阴性的条边缘(310,320)。玻璃纤维层插入所述模具(300)和所述阴性的条边缘(310,320)中,以便实现在所述玻璃纤维层的端部处的横向嵌接,使得设置具有阴性的嵌接部的梁缘条(400)。所述梁缘条(400)借助于阴性的嵌接部装入所述转子叶片的芯材料中。(A method for producing a rotor blade for a wind energy plant is proposed. A mold (300) for a spar cap (400) is provided. The mold (300) has at least one strip edge (310, 320) that is negative. A glass fiber layer is inserted into the mold (300) and the female strip edges (310, 320) in order to achieve a transverse scarf at the ends of the glass fiber layer, so that a beam flange strip (400) with a female scarf is provided. The sparcap (400) is inserted into the core material of the rotor blade by means of a female engagement.)

1. A method for producing a wind power plant rotor blade (200) having the following steps:

providing a mold (300) for a spar cap (400),

wherein the mould (300) has at least one strip edge (310, 320) which is negative,

inserting a glass fibre layer into the mould (300) and the strip edge (310, 320) of the female part in order to achieve a transverse scarf joint at the ends of the glass fibre layer, such that a beam flange strip (400) is provided having a first and a second end (401, 402), wherein the first and/or second end (401, 402) has a female scarf joint, and

-form-fitting the first and/or second end (401, 402) of the sparcap (400) into a core material (210) of a rotor blade (200).

2. Method for manufacturing a rotor blade for a wind energy plant according to claim 1, wherein

The mold (300) has a component having a scarf joint.

3. Method for manufacturing a rotor blade for a wind energy plant according to claim 1 or 2, wherein

At least one resin passage is provided in the mold (300).

4. Method for manufacturing a wind power plant rotor blade according to any of claims 1 to 3, wherein

The strip edges (310, 320) have an angle of between 20 ° and 40 °, in particular between 22 ° and 35 °.

5. A wind power plant rotor blade (200) has

At least one spar cap (400) having first and second ends (401, 402), wherein the first and/or second ends (401, 402) have a female scarf joint,

wherein the first and/or second end (401, 402) of the sparcap (400) is form-fittingly inserted into a core material (210) of a rotor blade (200).

Technical Field

The invention relates to a method for producing a rotor blade for a wind energy plant.

Background

Fig. 1 shows a schematic cross section of a rotor blade of a wind energy installation. The rotor blade is typically constructed of two shells, wherein the first shell 10 is the suction side and the second shell 20 is the pressure side. Furthermore, the rotor blade has a spar cap (holmgort) 40 on the suction side and the pressure side, respectively, and a web 30, which connects the spar caps 40 on the suction side and the pressure side to one another. The web 40 is firmly connected to the material of the suction side and/or pressure side.

DE 102009047570 a1 describes a flange strip of a wind power installation and the production of such a flange strip. The spar cap is made up of a number of individual layers of glass or carbon fibre fabric which are placed in the mould. Next, a vacuum membrane is placed and epoxy is poured through the volume bounded by the mold and the vacuum membrane. If the resin has dried, the strip can continue to be used. The strip can then be arranged on the inside (suction side or pressure side) of the first or second shell. The side walls of the mould can have a slight slope so that the ends of the beam cap can also be slightly sloped.

The individual fabric strips should be transversely engaged during the production of the beam flange strip. For the engagement, foam wedges or foam cams of different thicknesses can be used.

Typically, the strips are provided with straight edges or ends. For this purpose, a first wedge of a softer material is provided, and a second wedge of a harder material can be provided on the first wedge, so that the strip has the softer material at its outer region.

Typically, the strips are made with a rectangular cross-section. During this process, the transverse scarf joint can be simulated by a foam wedge, in particular a foam wedge can be provided at the edge. However, this is disadvantageous in terms of transportability of the sill strip, since the soft foam wedges can be damaged.

In the manufacture of the beam flange, the lower fiberglass layer is inserted and the foam strip can be placed at the die edge. The foam strip is then designed as a wedge, which engages purely in the interior. In this negative engagement, the glass fabric can then be placed. The glass fiber fabric forming the main part of the web must engage in the transverse direction in order to provide a soft transition between the web, which is designed as a structural component, and the sandwich layer, which adjoins the upper and lower edges of the blade. The foam strips provided at the edges of the spar cap can have different thicknesses, whereby the spar cap is very expensive to manufacture.

In the german patent application on which priority is based, the german patent and trademark office has searched for the following documents: DE 102009047570 a1, DE 102012219226 a1, DE 102010002432 a1, DE 10336461 a1 and US 2017/0001387 a 1.

Foam wedges or foam parts can be used when the strip is inserted into a rotor blade of a wind turbine. The foam member can have a resin channel. The core material can then be provided.

Disclosure of Invention

The object of the present invention is to provide a method for the improved production of a rotor blade for a wind energy plant. In particular, the object of the invention is to improve the production of a spar cap for a rotor blade of a wind energy plant.

This object is achieved by a method for manufacturing a rotor blade for a wind energy plant according to claim 1.

A method for producing a rotor blade for a wind power plant is therefore proposed. A mold for a flange strip is provided. The mold has at least one negative strip edge. The glass fibre layer is inserted into the mould and the female flange in order to achieve a transverse scarf joint at the ends of the glass fibre layer, so that the flange strip is provided with a female scarf joint. The web is inserted into the core material of the rotor blade by means of a female engagement.

According to one aspect of the invention, a mold has a component with a scarf joint.

According to another aspect of the invention, the mold has at least one resin passage.

The invention relates to the following basic idea: a spar cap for a rotor blade of a wind energy plant is proposed, which does not have a foam strip at the end of the spar cap. This can be achieved in particular by: the foam wedges are provided as part of the mold or the wedges or foam wedges are already integrated into the mold used to manufacture the spar cap. This, while resulting in a more complex mold, improves the manufacturing process or manufacture of the spar cap. The glass fiber layer can then be inserted into the mold according to the invention. In particular, the glass fiber fabric layer can engage with a high degree of inclination on the strip edge of the female part. The desired transverse engagement can thereby be achieved. The molding obtained here can be adapted to a machine-made sandwich foam mold, wherein the sandwich foam can be introduced below or into the female engagement portion.

According to the present invention, a flange strip having a female caulking portion is manufactured. The flange strip can be made of fiberglass fabric, so that the material of the flange strip is a hard or hardened material.

According to one aspect of the invention, the foam member can have a scarf joint and a resin channel. The foam part for providing the resin channel can be positively engaged, so that this then engages with the female engagement portion of the beam flange. In this case, a transition between the hard material and the soft material can be provided at the transition between the fabric of the bead and the foam component.

By the production according to the invention of the beam flange, no additional strip of core material is required for the height compensation. The transverse engagement of the individual textile elements is retained, a form-fit without gaps with the core material of the rotor shell is ensured, and the elements can be produced in the form of an incomplete edge.

According to one aspect of the invention, the scarf is an end of a part or element (e.g., a spar cap) that is inclined at an acute angle. The fitting portion can reduce the peeling stress, so that the strength of the connection is improved.

During the manufacture of the bead strips in the box mould and the use of the strip edge strip at the bead strip transition to the core material, as is common in the prior art, a gap between the bead strip and the core material is caused. In contrast, by means of the transverse seam of the fabric according to the invention, a firmly defined fabric width of the flange strip is provided, which forms a step or seam in the transverse direction. In this way, a transition which is form-fitting and substantially free of play is provided between the core material, the rotor blade shell and the flange strip. This is achieved in particular by the female engagement of the flange strip.

Further embodiments of the invention are the subject matter of the dependent claims.

Drawings

Advantages and embodiments of the invention are explained in detail below with reference to the drawings.

FIG. 1 shows a schematic cross section of a rotor blade of a wind energy plant according to the prior art,

figure 2 shows a schematic view of a wind energy plant according to the invention,

figure 3A shows a schematic cross-sectional view of a part of a rotor blade,

figure 3B shows a schematic cross-sectional view a-a of figure 3A,

figure 3C shows a schematic cross-sectional view B-B of the cross-section of figure 3A,

FIG. 4A shows a schematic cross-sectional view of the cap as it is being fabricated,

FIG. 4B shows another schematic cross-sectional view of the cap as it is being fabricated,

FIG. 4C shows another schematic cross-sectional view of the cap during its manufacture, an

FIG. 5 shows a schematic cross-section of a portion of a rotor blade according to an embodiment of the invention.

Detailed Description

Fig. 2 shows a schematic view of a wind energy plant according to the invention. The wind energy installation 100 has a tower 102 and a nacelle 104 on the tower 102. An aerodynamic rotor 106 is arranged on the nacelle 104, said rotor having three rotor blades 200 and a wind deflector 110. The aerodynamic rotor 106, when the wind power installation is in operation, causes the rotor or armature of a generator, which is coupled directly or indirectly to the aerodynamic rotor 106, to also rotate as a result of the wind entering into a rotational movement. An electrical generator is disposed in nacelle 104 and generates electrical energy. The pitch angle of the rotor blades 200 can be changed by a pitch motor at the rotor blade root of the respective rotor blade 200.

Fig. 3A to 3D show different schematic cross-sectional views of a part of a rotor blade 200 according to the invention when manufacturing a sparcap. A schematic cross-sectional view along the section a-a is shown in fig. 3B and a schematic cross-sectional view along the section B-B is shown in fig. 3C.

The method according to the invention for producing a spar cap 400 for a rotor blade 200 of a wind energy plant uses a mold 300 with specially designed mold edges 310, 320. The leading edge 201 of the beam cap is shown in fig. 3A to 3C. Furthermore, a core material 210 of the rotor blade 200 is shown in fig. 3A. In fig. 3B and 3C, a mold 300 having mold edges 310, 320 and a bead 400 having first and second ends 401, 402 are shown.

According to one aspect of the invention, the angle of the first die edge 310 can be 35 ° and the angle of the second die edge 320 can be 22 °. According to one aspect of the invention, these angles can be designed identically.

Narrow strips 410 and/or wide strips 420 can be provided in fig. 3B.

Fig. 3C shows an alternative embodiment of a mold 300 with a second mold edge 320.

Fig. 4A to 4C show different schematic cross-sectional views of a spar cap according to the present invention. The mold 300 (above) and the mold 300 with the beam 400 are shown in fig. 4A to 4C, respectively. The design of the mould 300 and the flange strip 400 according to fig. 4A substantially corresponds to the design of the mould and the flange strip of fig. 3B. The design of the mould and the beam flange strip according to fig. 4B substantially corresponds to the design of the mould 300 and the beam flange strip 400 of fig. 3C.

FIG. 5 shows a schematic cross-section of a portion of a rotor blade according to an embodiment of the invention. Shown in fig. 5 is a core material 210, a bead 400 having first and second ends 401, 402 and optionally a foam insert 500. The first and second ends 401, 402 of the flange strip each have a female scarf joint. The foam insert 500 has beveled ends 510 and optionally resin channels 520. The resin passage 520 can be provided on the side opposite to the end 510.

As can be seen in fig. 5, the web 400 is arranged with its two ends in the core material 210 of the rotor blade, said ends each having a female scarf connection. By the gently sloping angle of the sparcap in combination with the gently sloping angle of the core material 210, a large-area form-fitting and gap-free transition is achieved between the sparcap and the core material of the rotor blade.