A wind turbine blade with multiple spar caps
AssigneeLm Wind Power A/S
InventorsKlavs JESPERSEN, Lars NIELSEN
Life of this patent
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Abstract
The present invention relates to wind turbine blade and a method of manufacturing the wind turbine blade. An aerodynamic shell is provided with a recess (70) at its inner surface, the recess (70) extending with-in the shell along a spanwise direction of the blade. A first region of the recess (70) has a first width and a second region of the recess (70) has a second width exceeding the first width. A transition region is provided between the first region and the second region of the re-cess. A first and a second spar cap (80, 82) are arranged within the shell.
Claims15
A wind turbine blade comprising:
- an aerodynamic shell (62) having an outer surface (64) forming at least part of an exterior surface of the wind turbine blade and an inner surface (66),
- a recess (70) at the inner surface (66) of the aerodynamic shell, the recess (70) extending within the shell along a spanwise direction of the blade, wherein the recess (70) comprises a first region (72) having a first width, a second region (74) having a second width exceeding the first width, and a transition region (73) connecting the first region (72) with the second region (74) of the recess (70), and
- a load carrying structure comprising a first and a second spar cap (80, 82) extending within the shell (62) along a spanwise direction of the blade, wherein the first spar cap (80) is arranged at least partly in the recess (70) of the aerodynamic shell, and wherein the second spar cap (82) is arranged on top of at least part of the first spar cap (80).
A method of manufacturing a wind turbine blade, wherein the method comprises the steps of:
- manufacturing an aerodynamic shell comprising a recess (70) at the inner surface of the aerodynamic shell, the recess (70) extending within the shell along a spanwise direction of the blade, wherein the recess (70) comprises a first region having a first width, a second region having a second width exceeding the first width, and a transition region connecting the first region with the second region of the recess (70), and
- arranging a first spar cap (80) in the shell such that it extends within the shell along a spanwise direction of the blade, wherein the first spar cap (80) is arranged at least partly in the recess (70) of the aerodynamic shell,
- bonding the first spar cap (80) to the shell,
- arranging a second spar cap (82) on top of at least part of the first spar cap (80),
- bonding the second spar cap (82) to the first spar cap (80) and optionally to the aerodynamic shell.
Dependencies are inferred from the claim text.