Propeller module for an aero gas turbine engine

Details Propeller module for an aero gas turbine engine Propeller module for an aero gas turbine engine

1986-02-25

1987-08-25

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Plural impellers having relative movement or independent...

Coaxial rotation

416129, B64C 1148

Patent

active

046889957

ABSTRACT:
A propeller module for an aero gas turbine engine comprises two contra-rotating propellers driven by a reduction gearbox positioned axially between the propellers.
Pitch change mechanisms operated by a pitch change power unit are provided to change the pitch of the propeller blades. The pitch change power unit is positioned in the hub of the second multi-bladed propeller and is remote from the first multi-bladed propeller. The first and second pitch change mechanisms are mounted on the reduction gearbox. The first pitch change mechanism comprises first pitch change gears which are rotatably mounted on a carrier of the reduction gearbox by spindles which extend axially through planet gears of the gearbox. The second pitch change mechanism comprises second pitch change gears rotatably mounted on the carrier.

REFERENCES:
patent: 2394299 (1946-02-01), Friedrich
patent: 3900274 (1987-08-01), Johnston
patent: 4486146 (1984-12-01), Campion
patent: 4563129 (1986-01-01), Pagluica
patent: 4591313 (1986-05-01), Miyatake et al.

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