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Title: Wind turbine rotor hub and teeter joint

A rotor hub is provided for coupling a wind turbine rotor blade and a shaft. The hub has a yoke with a body which is connected to the shaft, and extension portions which are connected to teeter bearing blocks, each of which has an aperture. The blocks are connected to a saddle which envelops the rotor blade by one or two shafts which pass through the apertures in the bearing blocks. The saddle and blade are separated by a rubber interface which provides for distribution of stress over a larger portion of the blade. Two teeter control mechanisms, which may include hydraulic pistons and springs, are connected to the rotor blade and to the yoke at extension portions. These control mechanisms provide end-of-stroke damping, braking, and stiffness based on the teeter angle and speed of the blade.
Inventors:
 [1];  [1];  [2]
  1. (Warren, VT)
  2. (Stowe, VT)
Issue Date:
OSTI Identifier:
869540
Assignee:
Northern Power Systems, Inc. (Moretown, VT) NREL
Patent Number(s):
US 5354175
Application Number:
08/113,963
Contract Number:
ZG-0-19090-2
Country of Publication:
United States
Language:
English
Subject:
wind; turbine; rotor; hub; teeter; joint; provided; coupling; blade; shaft; yoke; connected; extension; portions; bearing; blocks; aperture; saddle; envelops; shafts; pass; apertures; separated; rubber; interface; provides; distribution; stress; larger; portion; control; mechanisms; hydraulic; pistons; springs; provide; end-of-stroke; damping; braking; stiffness; based; angle; speed; rotor blade; turbine rotor; wind turbine; control mechanism; rotor hub; control mechanisms; bearing blocks; /416/