Fluid reaction surfaces (i.e. – impellers) – Plural impellers having relative movement or independent... – Coaxial rotation
Patent
1986-12-09
1988-04-19
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Plural impellers having relative movement or independent...
Coaxial rotation
416129, 416157B, B64C 1144
Patent
active
047385898
ABSTRACT:
A propeller module for an aero gas turbine engine comprising two contra-rotating propellers has a reduction gear train positioned axially between the propellers. Pitch change mechanism are provided to change the pitch of the blades of both propellers independently of the differential speed of the propellers. The pitch change mechanisms comprise two sets of hydraulic motors one set of which is mounted on a carrier member of the gear train within the planet gears, the other set is mounted on the hub of the second propeller. Pitch selector valves control the supply of hydraulic fluid to the hydraulic motors, and the pitch selector valves are operated by a pitch change power unit. The pitch selector valves are positioned coaxially of the propellers and a transfer tube extends coaxially between the pitch selector valves to transfer hydraulic fluid therebetween independently of differential speed of the propellers.
REFERENCES:
patent: 2394299 (1946-02-01), Friedrich
patent: 2679907 (1954-06-01), Frankland
patent: 2876848 (1959-03-01), Detamore et al.
patent: 2948343 (1960-08-01), Conn et al.
patent: 3545881 (1970-12-01), Naulty
patent: 3575529 (1971-04-01), Bierman
patent: 3994128 (1976-11-01), Griswold et al.
patent: 4486146 (1984-12-01), Campion
patent: 4563129 (1986-01-01), Pagluica
patent: 4591313 (1986-05-01), Miyatake et al.
Powell Jr. Everette A.
Rolls-Royce plc
LandOfFree
Propeller module for an aero gas turbine engine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Propeller module for an aero gas turbine engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Propeller module for an aero gas turbine engine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2172469