Windmill

Patent · Mon Mar 09 23:00:00 EST 1987

OSTI ID:6672669

Hsech-Pen, L

A windmill is described comprising: a supporting frame; vertical shaft portions coaxially connected in series to form an integrated vertical transmission shaft rotatably mounted in the supporting frame; fan blades each transversely pivotedly mounted on the vertical shaft portion; a sweeping cleaner fixed on the lower portion of the vertical transmission shaft; a power generator having a set of gears for accelerating rotation speed as driven by the vertical transmission shaft and formed on the lower end of the transmission shaft; and a high-speed braking clutch operatively braking the rotation of the transmission shaft and the power generator. The improvement is described which comprises: the fan blade formed with two bending edges respectively longitudinally protruding from the two vertical edges of the fan blade in a direction opposite to the rotation direction of the fan blade under wind pressure. It is formed with a horizontal shaft having its inner end pivotedly mounted in a roller bearing within a horizontal bush of the vertical shaft portion and its outer end pivotedly mounted in a vertical link suspensively holding the horizontal shaft about the vertical shaft portion. The inner end of the horizontal shaft of the fan blade is formed with a vertical rod thereunder to be operatively obstructed by a limiting rod transversely extending outwards from the horizontal bush of the vertical shaft portion when feathering the fan blade.

• Assignee: NOV; EDB-87-071296; NOV-87-051324
• Patent Number(s): US 4649284
• OSTI ID: 6672669
• Country of Publication: United States
• Language: English

Related Subjects

17 WIND ENERGY
170602* -- Wind Energy Engineering-- Turbine Design & Operation
ACCELERATION
DESIGN
ELECTRIC GENERATORS
GEARS
MACHINE PARTS
MACHINERY
MECHANICAL STRUCTURES
MECHANICAL TRANSMISSIONS
MOTION
OPERATION
RODS
ROTATION
SHAFTS
SUPPORTS
TURBINE BLADES
TURBINES
TURBOMACHINERY
VELOCITY
WIND TURBINES