Rotor assembly

摘要

A rotor assembly is disclosed herein. The rotor assembly includes a hub disposed for rotation about an axis of rotation. The rotor assembly also includes at least one blade fixed with the hub for concurrent rotation with the hub. The at least one blade extends along a height axis radially outward from the hub with a root portion proximate to the hub at a first end of the height axis and an airfoil portion extending radially inward from a second end of the height axis opposite the first end. The rotor assembly also includes a sheath extending at least partially around the root portion. The sheath is pivotally engaged with the at least one blade to pivot about the height axis and allowed to weathervane to reduce noise.

主权项

1. A rotor assembly comprising:
a hub disposed for rotation about an axis of rotation; at least one blade fixed with said hub for concurrent rotation with said hub, said at least one blade extending along a height axis radially outward from said hub with a root portion proximate to said hub at a first end of said height axis and an airfoil portion extending radially inward from a second end of said height axis opposite said first end; a sheath extending at least partially around said root portion and being pivotally engaged with said at least one blade to pivot about said height axis to weathervane to a neutral position in all operating conditions; at least one damper connected with and operable to dampen pivoting movement of said sheath about said height axis, said at least one damper is positioned inside said sheath; and at least one biasing member connected with and operable to bias said sheath, said at least one biasing member is positioned inside said sheath.