F - Mech Eng,Light,Heat,Weapons – 03 – D
Patent
F - Mech Eng,Light,Heat,Weapons
03
D
170/30
F03D 11/04 (2006.01)
Patent
CA 1068609
Title of the Invention WIND ELECTRIC PLANT Abstract of the Disclosure A multiblade, wind-driven, variable pitch propeller is used in a wind electric plant for the generation of electrical power from wind forces, and the propeller is rotatable in a plane at an angle to the tower axis, thus pre- senting a better angle of attack to prevailing wind forces and at the same time enabling larger propellers to be used without propeller-tower interference and also reducing the distance between the propeller and gear case. A snubber arrangement is provided on the propeller blade return springs to slow the governor action and prevent abrupt pitch changes and damaging flutter of the blades, and a self-centering, double-action pivot washer is provided between the propeller blades and the return springs to ensure free pivoting and long life of the spring connecting bolts. Easily adjustable positive blade stop bolts are engaged directly between the hub and the propeller blades to limit return movement thereof and the propeller hub-return spring connection includes a laterally movable spring bracket which enables the propeller blades to feather in the event one or more return springs is broken or otherwise rendered inoperative. The gear case center, ring gear and axis of propeller rotation are offset laterally from the axis of the tower and pinion gear, to balance torque forces generated at the gears with wind forces on the propeller, and in one form of the invention, the pinion gear is located near the top of the gear case and the pinion gear shaft is surrounded by an oil seal sleeve, thus removing the pinion gear and shaft from the frictional drag of the gear lubricant and eliminating the need for an oil seal between the pinion shaft and gear case.
261648
Jacobs Marcellus L.
Jacobs Paul R.
Jacobs Marcellus L.
Jacobs Paul R.
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