Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Laminated – embedded member or encased material
Patent
1982-01-26
1983-11-01
Marcus, Stephen
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Laminated, embedded member or encased material
416229R, 416239, 416248, 416241A, B64C 2746, B64C 2748, B64C 1126
Patent
active
044127847
ABSTRACT:
The present rotor blade is constructed as a so-called monocoque or shell type blade for use in large fans and windmill rotors. For this purpose the blade is made of fiber reinforced synthetic material with a differnt orientation of the fibers in different sections of the blade. The transition between the blade proper and the connecting end of the blade is formed by a blade root section which has a connecting end of circular or elliptical cross-section and a wing facing end corresponding in cross-section to the blade cross-section. The blade root section has three zones. In the main leading edge zone including the leading edge and adjacent sides of the blade root section the reinforcing fibers extend in parallel to one another. The fibers also extend unidirectionally in a rear zone forming the trailing edge of the blade root section and in this trailing edge zone the fibers also extend in parallel to one another but at an angle relative to the fibers in the leading edge zone. An intermediate zone is located between the leading and trailing edge zones. The fibers in the intermediate zone are arranged in a cross-over relationship relative to one another. The connecting end is formed only by unidirectionally extending fibers.
REFERENCES:
patent: 1875597 (1932-09-01), Heath
patent: 4242160 (1980-12-01), Pinter et al.
Hahn Michael
Wackerle Peter-Martin
Fasse W. G.
Kane, Jr. D. H.
Kwon John
Marcus Stephen
Messerschmitt-Boelkow-Blohm GmbH
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