Control system for variable pitch fan

Details Control system for variable pitch fan Control system for variable pitch fan

F - Mech Eng,Light,Heat,Weapons

04

D

F04D 27/00 (2006.01) F04D 29/36 (2006.01) F15B 21/12 (2006.01) F15C 3/16 (2006.01)

Patent

CA 2483109

Pitch control of a variable pitch fan is obtained using pulsed pressure. Pitch is varied incrementally either towards or away from full pitch by pulsed application of fluid to a piston used to drive the blades of the fan into or away from full pitch. Reverse pitch is used to clear debris from the fan. Valves control flow of fluid to the piston. The valve operation is controlled by a controller.

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