A method of manufacturing a spar for a wind turbine from elements having end portions extending transversely to an intermediate portion
A mid-section, longitudinally extending technique used in the manufacture of spar for wind turbines, which resolves issues such as uncertainty in the external geometry of tubular elements
Active Publication Date: 2015-03-11
VESTAS WIND SYST AS
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
In contrast, the outer geometry of the final tubular element is less defined, since the influence of even small variations on the mandrel or core and / or small variations in the innermost layer of winding material increases with the number of windings
Method used
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Embodiment Construction
[0095] Figure 1a One embodiment of a spar 1 for a wind turbine blade (not shown) is shown. The spar 1 comprises two cover plates 2a, 2b and two webs 3a, 3b.
[0096] Each cover plate 2 a , 2 b forms an intermediate portion 4 between two end portions 5 . Each end portion 5 forms a cover engaging surface portion 6 and the middle portion 4 forms an outer surface portion 7 .
[0097] Each web 3a, 3b is provided with web engaging surface portions 8 along opposite longitudinally extending edges.
[0098] When the joint surface portion 6 of the cover plate is connected with the joint surface portion 8 of the web, a spar 1 having a tubular configuration is formed. The joint surface portions 6, 8 are bonded together using an adhesive 9, as shown Figure 1a the enlarged part of Figure 1b shown.
[0099] The cover plates 2a, 2b and webs 3a, 3b are molded in the cap and web moulds, and the geometry of their joint surface portions 6, 8 is defined by the shape of these moulds. That i...
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Abstract
The invention provides a method of manufacturing a spar for a wind turbine blade. The method includes providing at least two caps, each cap forming an intermediate portion between two end portions, where the end portions each forms a cap joint surface portion along a longitudinal extending edge of the end portion and the intermediate portion forms an outer surface portion of the spar, providing at least two webs, each web being provided with web joint surface portions along opposite and longitudinally extending edges, and connecting the joint surface portions of the caps with the joint surface portions of the webs to form a tubular configuration of the spar. The caps are provided so that the end portions extend transversely to the intermediate portion and the caps are arranged relative to each other so that the end portions of one cap extend from the intermediate portion towards the end portions of another cap.
Description
technical field [0001] The invention relates to a method of manufacturing a spar for a wind turbine and the spar itself. Background technique [0002] Typically, spars are used as stiffeners in wind turbine blades. The spar is located between two shell sections, one shell section defining the windward shell section and the other shell section defining the leeward shell section. A spar is located in the cavity between the two wind turbine shell parts and extends substantially through the shell cavity to increase the strength of the wind turbine blade. [0003] Composite materials are often used for spars used in wind turbine blades in order to increase their strength and limit their weight, since such blades are exposed to fluctuating loads with high peaks. [0004] Typically a spar is a tubular element manufactured using a male formwork, for example by winding a suitable material around a mandrel or similar core element. [0005] When the material is wound or otherwise ap...
Claims
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IPC IPC(8): B29C65/00F03D1/06
CPCB29C65/7841B29K2707/04B29C66/721B29K2309/08B29K2067/00B29L2031/008B29C66/547B29C66/116B29C66/1122B29C66/543Y10T29/4978B29K2709/08B29L2031/7504B29L2023/00B29K2101/12Y02E10/721B29C66/1162Y10T29/49826B29D23/001B29C70/882B29L2031/085B29C65/483B29K2063/00B29L2031/082F03D1/065B29L2022/00B29C65/5057Y10T29/49339B29C66/131B29C65/5014B29K2311/14B25B11/02B29L2031/766B29K2307/00B29C65/48B29C65/4835B29C66/112B29K2105/06B29K2311/10B29K2101/10B29C66/71B29C66/7212B29C66/72141B29C66/7392B29C66/73921B29C66/7394B29C66/73941Y02E10/72Y02P70/50B29K2307/04B29K2067/003F03D80/30B29C65/00
Inventor M·汉考克A·赫奇斯T·弗龙斯基
Owner VESTAS WIND SYST AS