Method for fabricating wind turbine blades

Details Method for fabricating wind turbine blades Method for fabricating wind turbine blades

1980-09-25

1982-11-23

Wise, Edward J.

Boots, shoes, and leggings

364468, 291568B, G06F 1520

Patent

active

043608710

ABSTRACT:
The manufacture of large scale wind turbine blades is accomplished by winding composite fiber materials onto a mandrel to form the desired airfoil shape. The winding process requires that the fibers always maintain contact with the mandrel surface. If the surface is concave the fibers will form a bridge over the concave surface portion which produces a void. This invention avoids bridging by analysis of the mandrel surface design including the steps of defining a plurality of coordinate points on the surface prior to winding thereof, and determining if a concavity will occur in the fiber winding plane passing through each coordinate point. If a concavity is located, the mandrel design coordinate point at the concavity is modified to eliminate the concavity and provide a continuous flat or convex surface in the fiber winding plane. The process can be automated by clerical or computing methods, and is repeated for each coordinate point until bridging is substantially eliminated.

REFERENCES:
patent: T915006 (1973-10-01), Friedman
patent: 3224690 (1965-12-01), Holman
patent: 3234362 (1966-02-01), Holman
patent: 3653110 (1972-04-01), King et al.
patent: 3771168 (1973-11-01), Beach et al.
patent: 3875389 (1975-04-01), McFadden et al.
patent: 3882304 (1975-05-01), Walters
patent: 4079235 (1978-03-01), Froyd et al.
patent: 4145740 (1979-03-01), McCean et al.
patent: 4251036 (1981-02-01), McLain

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