WIND POWER PLANT ROTOR BLADE

Abstract

Provided is a wind power plant rotor blade, with a rotor blade root area, a rotor blade tip area, a rotor blade leading edge, a rotor blade trailing edge, a rotor blade longitudinal axis, a rotor blade inner section, a rotor blade outer section, as well as a dividing plane between the rotor blade outer section and the rotor blade inner section. The rotor blade can be split along the dividing plane. The rotor blade further has a respective reinforcement area in the rotor blade inner section and the rotor blade outer section, which each are arranged next to the dividing plane. The rotor blade is given a multi-part design by splitting it along the dividing plane. After splitting the rotor blade along the dividing plane, the reinforcement area on the rotor blade inner section can be fastened to the reinforcement area of the rotor blade outer section.

Claims

1. A wind power plant rotor blade, comprising: a rotor blade root area, a rotor blade tip area, a rotor blade leading edge, a rotor blade trailing edge, a rotor blade longitudinal axis, a rotor blade inner section, a rotor blade outer section, and a dividing plane between the rotor blade outer section and the rotor blade inner section, wherein the rotor blade is configured to be split along the dividing plane; and respective reinforcement areas in the rotor blade inner section and the rotor blade outer section and arranged at the dividing plane, wherein the dividing plane and the reinforcement areas are adapted such that the rotor blade is of a multi-part design configured to be split at the dividing plane, wherein, after splitting the rotor blade along the dividing plane, the reinforcement area on the rotor blade inner section is configured to be fastened to the reinforcement area of the rotor blade outer section.

2. The wind power plant rotor blade according to claim 1, further comprising: a first main belt in the rotor blade inner section and a second main belt in the rotor blade outer section.

3. The wind power plant rotor blade according to claim 2, wherein ends of the first and second main belts are scarfed.

4. The wind power plant rotor blade according to claim 1, further comprising: a first web in the area of the first main belt and a second web in the area of the second main belt, wherein the first and second webs end before the dividing plane.

5. The wind power plant rotor blade according to claim 1, further comprising: a trailing edge reinforcement and a trailing edge web in the rotor blade inner section and in the rotor blade outer section.

6. The wind power plant rotor blade according to claim 1, wherein the reinforcement areas have a plurality of through holes.

7. A wind power plant comprising an aerodynamic rotor and at least one wind power plant rotor blade according to claim 1 coupled to the aerodynamic rotor.

8. A method for mounting a wind power plant rotor blade to a nacelle of a wind power plant, the method comprising: checking logistical restrictions on an installation site of the wind power plant, selecting a one-part or multi-part rotor blade based on the logistical restrictions, manufacturing a wind power plant rotor blade in a one-part version in a main die based on the logistical restrictions, splitting the wind power plant rotor blade manufactured in one part along at least one dividing plane based on the logistical restrictions to obtain at least one rotor blade inner section and at least one rotor blade outer section, transporting the rotor blade inner section and the rotor blade outer section to the installation site separately from each other; joining the rotor blade inner section and the rotor blade outer section together at the installation site, and mounting the assembled rotor blade on the nacelle of the wind power plant.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

[0023] Advantages and exemplary embodiments of the invention will be explained in more detail below with reference to the drawings.

[0024] FIG. 1 shows a schematic illustration of a wind power plant according to the invention,

[0025] FIG. 2 shows a schematic illustration of a wind power plant rotor blade according to a first exemplary embodiment,

[0026] FIG. 3 shows a schematic illustration of a wind power plant rotor blade according to a second exemplary embodiment,

[0027] FIG. 4 shows a schematic illustration of a wind power plant rotor blade according to a third exemplary embodiment,

[0028] FIG. 5 shows a schematic illustration of a wind power plant rotor blade according to a fourth exemplary embodiment,

[0029] FIG. 6 shows a schematic illustration of a wind power plant rotor blade according to a fifth exemplary embodiment,

[0030] FIG. 7 shows a schematic illustration of a wind power plant rotor blade according to a sixth exemplary embodiment,

[0031] FIG. 8 shows a perspective view of trailing edge webs according to the seventh exemplary embodiment.

DETAILED DESCRIPTION

[0032] FIG. 1 shows a schematic illustration of a wind power plant according to the invention. The wind power plant 100 has a tower 102 as well as a nacelle 104 and an aerodynamic rotor 106. The aerodynamic rotor 106 has a spinner 110, and also three rotor blades 200, for example. The aerodynamic rotor 106 is directly or indirectly coupled with the electrical generator, and drives an electrical rotor of the generator, so as to generate electrical energy.

[0033] FIG. 2 shows a schematic illustration of a wind power plant rotor blade according to a first exemplary embodiment. The rotor blade 200 has a rotor blade root 201, a rotor blade tip 202, a rotor blade leading edge 203 and a rotor blade trailing edge 204. The rotor blade 200 further has a rotor blade longitudinal axis 205 as well as a dividing plane 206, for example which is configured at a right angle to the rotor blade longitudinal axis 205 and parallel to the rotor blade root 201a. If the rotor blade is split along the dividing line 206, the rotor blade has a rotor blade inner section 210 and a rotor blade outer section 220.

[0034] The rotor blade can further have two half shells, which can be bonded together. In the first exemplary embodiment, the two half shells are first manufactured, and then bonded together. If a one-part rotor blade is required, the rotor blade is not split along the dividing plane 206. However, if a multi-part rotor blade is required, the rotor blade is split along the dividing plane 206. For example, this can be done by sawing open the rotor blade at this location. In particular, this only takes place if the two half shells have been manufactured and bonded together. The rotor blade according to the first exemplary embodiment can thus have a one-part or multi-part configuration, without having to adjust the molds necessary for manufacturing the half shells for this purpose. Therefore, the rotor blade according to the first exemplary embodiment is suitable for use as a one-part or multi-part rotor blade.

[0035] FIG. 3 shows a schematic illustration of a wind power plant rotor blade according to a second exemplary embodiment. In addition to the parts of the rotor blade shown on FIG. 2, the rotor blade according to FIG. 3 has a first main belt 230 in the rotor blade inner section 210 and a second main belt 240 in the rotor blade outer section 220. The two main belts 230, 240 are used to absorb and divert the forces acting on the rotor blade. The respective ends 231, 232; 241, 242 of the first and second main belts 230, 240 can be scarfed in design.

[0036] The dividing plane 206 is preferably provided in the area of the inner third, i.e., the dividing plane 206 is located within the first 33% of the length of the rotor blade, so as to ideally be able to clamp and service the connecting elements from inside.

[0037] FIG. 4 shows a schematic illustration of a wind power plant rotor blade according to a third exemplary embodiment. In addition to the elements shown on FIG. 3, the rotor blade has a reinforcement area 250 both in and on the rotor blade inner section 210, as well as on the rotor blade outer section 220. The reinforcement area 250 can optionally be scarfed in design, and is intended to enable a connection between the rotor blade inner section 210 and the rotor blade outer section 220 once the rotor blade has been split along the dividing plane 206, so as to obtain a multi-part rotor blade. An increase in the inertia moment is limited by additional dead weight.

[0038] In particular by providing the reinforcement area 250 on the rotor blade inner section 210 and the rotor blade outer section, and in particular in the area of the dividing plane 206, the rotor blade can be used as one part or multiple parts. For multi-part use, the rotor blade need only be split or sawn open along the dividing plane 206 (which preferably is configured perpendicular to the rotor blade longitudinal axis 205). The rotor blade need not be further adjusted for the multi-part mold.

[0039] As a consequence, the same molds can be used for manufacturing the half shells, regardless of whether the rotor blade is to have a one-part or multi-part configuration.

[0040] While providing the reinforcement area 250 does increase the weight of the rotor blade (for example by approx. 10%), the molds required for manufacturing the half shells remain the same, regardless of whether a one-part or multi-part rotor blade is required.

[0041] FIG. 5 shows a schematic illustration of a wind power plant rotor blade according to a fourth exemplary embodiment. In addition to the elements shown on FIG. 4, the rotor blade 200 according to the fourth exemplary embodiment has main webs 260, 270 in the area of the belts 230, 240. The main webs 260, 270 preferably end in the area of the reinforcement area 250 before the dividing plane 206. As a consequence, the main webs 260, 270 do not have a continuous configuration. Therefore, neither main webs nor main belts are provided in particular around the area of the dividing plane 206.

[0042] FIG. 6 shows a schematic illustration of a wind power plant rotor blade according to a fifth exemplary embodiment. In addition to the elements of the rotor blade according to the fourth exemplary embodiment, the rotor blade 200 according to the fifth exemplary embodiment has a trailing edge reinforcement 280 (e.g., in the form of belts) and a trailing edge web 290 (not shown on FIG. 6) both in the rotor blade inner section 210 and in the rotor blade outer section 220. As a consequence, the trailing edge reinforcement or the trailing edge webs do not have a continuous configuration, but rather are split in the area of the dividing plane 206. A connection can optionally be provided between the trailing edge webs on the rotor blade inner section 210 and the rotor blade outer section 220.

[0043] FIG. 7 shows a schematic illustration of a wind power plant rotor blade according to a sixth exemplary embodiment. The rotor blade 200 according to the sixth exemplary embodiment has a leading edge 203 and a trailing edge 204. In addition, the rotor blade 200 has a rotor blade wall 207, for example which can be manufactured with a sandwich design. The trailing edge reinforcements 280 can be provided in the rotor blade wall 207. Further provided is a reinforcement area 250 with a plurality of holes or through bores 251, which can enable a connection with the other rotor blade part. Further provided are a trailing edge web 290 and an extra web 295 (the perspective view on FIG. 7 shows the web 290 and the web 295 superposed), which serves as a connecting element to allow a transfer of forces.

[0044] FIG. 8 shows a perspective view of trailing edge webs according to the seventh exemplary embodiment. In particular, FIG. 8 provides the two trailing edge webs 290, which each are provided on the rotor blade inner section 210 and the rotor blade outer section 220. Provided between the two trailing edge webs 290 is an extra web 295, which serves to establish a connection between the two trailing edge webs 290 on the rotor blade inner section and the rotor blade outer section. An overlap is preferably provided between the trailing edge webs 290 and the extra web 295. For example, this overlap can measure between 100 and 300 mm.

[0045] The extra web 295 then serves as a connecting element, so that forces between the trailing edge webs 290 can be diverted.

[0046] The trailing edge webs 290 can be provided in the area of the trailing edge reinforcement 280. As shown on FIG. 7, for example, the webs 290 can be provided as a connection between the trailing edge reinforcements 280 on the suction side and pressure side.