A control circuit (20) for changing the angle of propeller blades (17) includes a propeller control unit (21) controlling a supply of oil to modify an angle of propeller blades (17), and a fixed-displacement pump (22) providing the supply of oil from an engine oil return system (13) to the propeller control unit (21). An oil cooling line (23) extends between an outlet (22B) of the pump (22) and the engine oil return system (13). The oil cooling line (23) defines an oil leakage path (27) leading to the engine oil return system (13) for cooling the oil. A flow regulator (30) between the pump (22) and the propeller control unit (21) is operable between an open position where oil is directed through the oil cooling line (23) to the engine oil return system (13) for cooling the oil, and a closed position blocking the oil cooling line (23) and directing oil toward the propeller control unit (21) to modify the angle of the propeller blades (17).
PROPELLER BLADE ANGLE CONTROL SYSTEM
SYSTEM ZUR STEUERUNG EINES PROPELLERSCHAUFELWINKELS
SYSTÈME DE COMMANDE D'ANGLE DE PALE D'HÉLICE
2020-07-15
Patent
Electronic Resource
English