Patent ID: 7528497
Filing Date: 2009-05-05
Classification: F03D,F05B,H02K,Y02E

Abstract:
1. A wind-turbine comprising: a tower; an aft nacelle structure mounted on the tower; a hollow shaft rotationally attached to the aft nacelle structure through at least one bearing, the hollow shaft having a maximum inner diameter; a rotor including a rotor-hub supported by the hollow shaft and having a rotor-hub maximum dimension, the rotor-hub receiving at least two blades with each blade having a blade-root maximum dimension; and teeter hinges spaced apart from each other by a distance and connected to the rotor-hub to allow a teetering action of the rotor-hub with respect to the hollow shaft, the hollow shaft structurally supporting the rotor with respect to the aft nacelle structure, and wherein the rotor-hub has a first portion and a second portion, with one blade being fixed to the first portion and the teeter hinges connecting the second portion to the hollow shaft such that the second portion is at least partially received within an interior of the hollow shaft.