阅读说明：本技术 用于制造风能设施的、尤其风能设施转子叶片的部件的方法 (Method for producing a component of a wind energy installation, in particular a rotor blade of a wind energy installation ) 是由 弗洛里安·施特普斯 托尔斯滕·贝特格 于 2019-01-17 设计创作，主要内容包括：提出一种用于制造风能设施(100)的、尤其风能设施转子叶片(200)的构件的方法。将缠绕芯(320)设置在可转动的轴(310)上。将真空薄膜(330)安置在缠绕芯(320)上。将要制造的构件(350)在真空薄膜(330)上借助于缠绕纤维织品进行缠绕。将外部模具(360)围绕缠绕的构件安置。执行真空灌注法并且将所灌注的树脂硬化。在此,在缠绕芯(320)上的真空薄膜(330)和外部模具(360)的内侧之间产生真空。(A method for producing a component of a wind energy installation (100), in particular a wind energy installation rotor blade (200), is proposed. A winding core (320) is disposed on a rotatable shaft (310). A vacuum film (330) is placed on the winding core (320). The component (350) to be produced is wound on the vacuum film (330) by means of a wound scrim. An outer mold (360) is disposed about the wound member. A vacuum infusion process is performed and the infused resin is hardened. Here, a vacuum is generated between the vacuum film (330) on the winding core (320) and the inside of the outer mold (360).)

1. Method for producing a component of a wind energy installation, in particular a rotor blade of a wind energy installation, having the following steps:

the winding core (320) is arranged on a rotatable shaft (310),

placing a vacuum film (330) on the winding core (320),

the component (350) to be produced is wound onto the vacuum film (330) by means of a wound scrim,

disposing an outer mold (360) around the wound member (350),

a vacuum infusion process is performed and,

the resin to be poured is hardened and,

wherein a vacuum is created between the vacuum film (330) on the winding core (320) and the inside of the outer mould (360) such that the wound scrim is pressed onto the inside of the outer mould (360).

2. Method for producing a component of a wind energy plant according to claim 1, wherein

The outer mold (360) is formed in multiple parts.

3. Method for producing a component of a wind energy plant according to claim 1 or 2, further having the steps of:

removing the winding core (320) before performing the vacuum infusion process.

4. Method for producing a component of a wind energy plant according to any of claims 1 to 3, further having the steps of:

separating the component (350) so as to provide separate individual sections.

5. A wind power plant rotor blade having:

at least one component manufactured by the method according to any one of claims 1 to 4.

Technical Field

The invention relates to a method for producing a component of a wind energy installation.

Background

Components of wind energy installations, for example parts of rotor blades of wind energy installations, can be produced by different methods. In this case, parts or elements of the wind energy installation can be wound at least partially in a winding process. Here, a woven textile fabric (Gelege) is wound around a profiled core. The scrim may be impregnated with resin, may be formed as a prepreg or may be used as a dry cloth scrim.

Fig. 14 shows a schematic view of a winding method. Here, the winding core 320 may be disposed on the shaft 310. The shaft 310 is put into rotation so that the winding core 320 is also rotated. The wound scrim 500 can then be wound onto the winding core 320 to obtain the desired construction 400. By means of the winding method, it is possible to transfer the outer contour of the winding core 320 to the inner contour or inner side of the component.

This can, however, result in the outer geometry of the component not comprising the desired outer contour.

DE 2719773 describes a method for producing blank bodies. The fiber material is wound onto a core mold and the sheath is applied externally. Subsequently, air is drawn away and forced into the impregnating resin. The blank body is then hardened and the core mold is removed from the hollow body. Subsequently, the skin may be mechanically removed.

In the german patent application based on priority, the german patent and trademark office retrieves the following documents: DE 3716335A 1, DE 102010026018A 1, DE 102015204490A 1, DE 102016110848A 1 and EP 2361752A 1.

Disclosure of Invention

The object of the present invention is to eliminate the above-mentioned disadvantages. The object of the invention is, in particular, to provide a method for more efficiently producing components of a wind energy installation. The object of the invention is, in particular, to provide a method for producing a component of a wind energy installation, in which the outer geometry of the component to be produced also becomes sufficiently flat or smooth.

The object is achieved by a method for producing a component of a wind energy installation according to claim 1.

Accordingly, a method for producing a component of a wind energy installation, in particular a rotor blade of a wind energy installation, is proposed. The winding core is disposed on a rotatable shaft. A vacuum film is placed on the winding core. The component to be produced is wound on the vacuum film by means of a wound scrim. An outer mold is placed around the wound member. A vacuum infusion process is performed and the infused resin is hardened. A vacuum is generated between the vacuum film on the winding core and the inner side of the outer mould tool, so that the fleece is pressed onto the inner side of the outer mould tool by means of a vacuum infusion process, so that a smooth outer surface of the wound-on part is achieved.

According to one aspect of the invention, the outer mould tool is formed in multiple parts.

According to another aspect of the invention, the winding core may be removed prior to performing the vacuum infusion process. This is advantageous because it is thereby already possible to use the winding core in other ways.

According to another aspect of the invention, the finished wound member may be removed to provide separate individual sections.

The invention relates to the concept of specifying a method for producing a component of a wind energy installation, in particular a rotor blade of a wind energy installation. For this purpose, a winding core is provided and a winding scrim is wound onto the core. Subsequently, an outer mould is placed on the wound fleece and a vacuum is generated, so that the fleece is pressed onto the inner side of the outer mould by means of a vacuum infusion process, so that a smooth outer surface of the wound part is achieved.

Optionally, the winding core may be removed prior to the vacuum infusion process so that the winding core may continue to be used during this time. By means of the method according to the invention, waves and wrinkles on the outer side or surface of the component to be produced can be avoided, since the fibre fleece is pressed onto the outer mould and thus tightened due to the vacuum infusion process.

According to one aspect of the invention, the outer mold can be designed in multiple parts, so that the component to be produced can be easily removed.

According to another aspect of the invention, the finished component may be divided into different individual parts.

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.

Figure 1 shows a schematic view of a wind energy plant according to the invention,

figures 2 to 9 schematically show different steps in the manufacture of a component for a wind energy plant,

fig. 10 shows a schematic view of the outer mould, which has been removed from the winding core,

figure 11 shows a schematic view of the finished component,

figure 12 shows a schematic view of a component and of a multi-piece outer mould tool,

FIG. 13 shows a schematic view of a multi-piece component, an

Fig. 14 shows a schematic view of a manufactured component according to the prior art.

Detailed Description

Fig. 1 shows a schematic view of a wind energy installation according to the invention. The wind energy installation 100 has a tower 102 and a nacelle 104. A rotor 106 is provided on the nacelle 104, said rotor having three rotor blades 200 and a fairing 110. Rotor 106 is set into rotational motion by the wind during operation and drives a generator in nacelle 104 to generate electrical energy. The rotor blade 200 has at least one component 350, which is manufactured according to the invention.

Fig. 2 to 9 schematically show different steps in the production of a component for a wind energy installation. In fig. 2, a winding unit 300 having a shaft 310 and a winding core 320 is shown. By the rotation of the shaft 310, the winding core is also rotated. As shown in fig. 3, a vacuum film 330 may be disposed around the winding core 320. Subsequently, as shown in fig. 4, a flow grid configuration 340 is provided around the vacuum membrane 330.

The scrim is wrapped around the winding core 320 with the vacuum membrane 330 and the flow grid construction 340 such that the component 350 to be manufactured is wrapped. The component 350 can have a first end 351 and a second end 352, wherein the second end 352 can be at least partially conically formed.

As can be seen in fig. 6, an outer mold 360 is disposed around the winding core 320 and the wound member 350. Because the outer mold is multi-piece, the first half shell of the outer mold 360 may be placed first. The second half shell may then surround the remaining member 350.

In fig. 7, the two half-shells constituting the outer mould are shown positioned around the member 350. The half shells are vacuum-tightly closed with respect to one another. The vacuum film 330 is vacuum-tightly closed by means of an external mold to form an infusion space into which resin can be introduced.

As can be seen in fig. 8 and 9, the winding core 320 together with the shaft 310 is completely removed, so that only the outer mould 360 is left with the components 350 located therein.

As can be seen in fig. 10, the outer mould together with the component may be removed and a vacuum potting process may be performed in order to pot the scrim of the wound component with resin. Subsequently, the resin may be hardened so that a finished component 350 is obtained at the end as visible in fig. 11.

As can be seen in fig. 12, the outer mold can be formed in at least two parts. Alternatively, the outer mold can also be formed in multiple parts.

As can be seen in fig. 13, the member 350 may be constructed in multiple pieces by separating the wound member into individual pieces.

According to the present invention, the vacuum film 330 is thus disposed on the winding core 320. The winding core is sealed towards the external mould, which is itself vacuum sealed as explained above. A further vacuum film may optionally be arranged between the member and the outer mould, so that a vacuum may be generated between the vacuum film and the outer mould. This may cause the wrapped scrim 350 to relax outwardly. Alternatively, the wound core 320 may be removed before the resin can be diffused into the wound scrim by means of a vacuum infusion process. This is advantageous according to the invention, since a ripple-free and corrugated outer contour of the component can thereby be obtained.

The thickness of the wound scrim is typically less than the spacing between the winding core and the inside of the outer mold, such that the scrim is compressed against the inner walls of the outer mold, possibly creating a gap between the scrim and the outer walls of the winding core 320. The fleece is thus tensioned from the inside to the outside and the winding core 320 can be removed in a simple manner.

After a vacuum is created between the vacuum film 330 and the inside of the outer mold 360, the outer mold 360 may be removed from the winding core.

The winding core 320 can then be reused during this period so that further components 350 can be manufactured.

The outer mould 360 may be constructed in one piece, depending on the geometry of the mould to be wound. Alternatively, the outer mold can be designed in multiple parts, so that the individual parts of the outer mold can be removed separately.

With the method according to the invention, it is possible, for example, to produce a blade connection region of a wind energy installation from a preform segment. The preform segment may be manufactured according to the present invention. This can avoid that the component has defects in the form of folds or compressions at the outer contour. This is also achieved according to the invention by using a vacuum infusion method.

The invention relates in particular to the use of a (multi-part) external male mould for producing wound components having a defined external geometry.

The components to be produced according to the invention can be inner and outer flange thickenings, preform segments and inner rotor blades. Alternatively, the beam box can be produced by means of the method according to the invention.

The method according to the invention enables efficient and defect-free manufacturing of rotor blade components. In particular, cutting capacity and component mould can be saved. Furthermore, the precision of the matching of the individual parts to one another and to the adjoining mold can be significantly improved.