Composite blade root structure

Details Composite blade root structure Composite blade root structure

2011-07-05

2011-07-05

Yu, Justine R (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Formed with main spar

C416S239000

Reexamination Certificate

active

07972114

ABSTRACT:
A spar of a rotor blade having moderate depth transitions to a relatively much deeper shank over a relatively short distance. This rapid transition enables a low-weight blade root that is structurally efficient, offers a high moment capability, and enables high Mach number axial flow. A transition could advantageously reduce section depth by at least 15%, 20%, 30%, or even 40% over at most 5%, 6%, 10%, or 12% of a total length of the rotor blade. Such a transition could advantageously be accomplished using a cuff, which has interfaces with each of the spar and the shank. The rotor blade shank has a generally circular cross-section which allows for a rotary attachment to a hub, where the attachment may advantageously comprise a mechanical or elastomeric bearing. Preferred embodiments have a spar with a generally rectangular cross-section.

REFERENCES:
patent: 2754916 (1956-07-01), Woolf
patent: 3112797 (1963-12-01), Reichelt
patent: 3476625 (1969-11-01), Slivinsky et al.
patent: 3734642 (1973-05-01), Dixon et al.
patent: 3765124 (1973-10-01), Ferris et al.
patent: 3768922 (1973-10-01), Dixon
patent: 4079903 (1978-03-01), Ashton et al.
patent: 4251309 (1981-02-01), Class et al.
patent: 4494910 (1985-01-01), Hahn et al.
patent: 4538780 (1985-09-01), Roe
patent: 4642028 (1987-02-01), Buckman et al.
patent: 4810167 (1989-03-01), Spoltman et al.
patent: 5129787 (1992-07-01), Violette et al.
patent: 6007298 (1999-12-01), Karem
patent: 6024325 (2000-02-01), Carter
patent: 6155784 (2000-12-01), Carter
patent: 6196066 (2001-03-01), Barbier
patent: 6220545 (2001-04-01), Fenny et al.
patent: 6447254 (2002-09-01), Holowczak et al.
patent: 6641365 (2003-11-01), Karem
patent: 6666651 (2003-12-01), Rust
patent: 6942455 (2005-09-01), Schmaling et al.
patent: 6986642 (2006-01-01), Carter
patent: 7165945 (2007-01-01), Kovalsky et al.
patent: 2006/0110256 (2006-05-01), Gigas et al.
patent: 2008/0310964 (2008-12-01), Llorente Gonzalez et al.

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