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Methods of making wind turbine rotor blades

United States Patent

7,351,040
April 1, 2008
View the Complete Patent at the US Patent & Trademark Office
National Renewable Energy Laboratory - Visit the NREL Technology Transfer Website
A method of manufacturing a root portion of a wind turbine blade includes, in an exemplary embodiment, providing an outer layer of reinforcing fibers including at least two woven mats of reinforcing fibers, providing an inner layer of reinforcing fibers including at least two woven mats of reinforcing fibers, and positioning at least two bands of reinforcing fibers between the inner and outer layers, with each band of reinforcing fibers including at least two woven mats of reinforcing fibers. The method further includes positioning a mat of randomly arranged reinforcing fibers between each pair of adjacent bands of reinforcing fibers, introducing a polymeric resin into the root potion of the wind turbine blade, infusing the resin through the outer layer, the inner layer, each band of reinforcing fibers, and each mat of random reinforcing fibers, and curing the resin to form the root portion of the wind turbine blade.
Livingston; Jamie T. (Pensacola, FL), Burke; Arthur H. E. (Gulf Breeze, FL), Bakhuis; Jan Willem (Nijverdal, NL), Van Breugel; Sjef (Enschede, NL), Billen; Andrew (Daarlerveen, NL)
General Electric Company (Schenectady, NY)
11/ 328,625
20070160479
January 9, 2006
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH & DEVELOPMENT The government of the United States of America has certain rights in this invention pursuant to NREL Subcontract No. NREL-ZAM-4-31235-05, Prime Contract No. DE-AC36-99GO10337 awarded by the U.S. Department of Energy.