Fluid reaction surfaces (i.e. – impellers) – Having positive means for impeller adjustment – Motor bodily rotatable with impeller hub or shaft
Patent
1983-12-30
1986-05-27
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Having positive means for impeller adjustment
Motor bodily rotatable with impeller hub or shaft
416165, 74 8915, B64C 1144
Patent
active
045913137
ABSTRACT:
A plurality of propeller blades are mounted to an axially elongated tubular propeller hub (H1). Each blade is rotatable in position about a radial axis. An electromechanical linear actuator (A1) is housed within the hub for rotating the blades to change their pitch. The actuator includes a rod member (R1) fixed in position relative to the hub, a casing (C1) which can extend and retract relative to the rod member, a rotary electric motor (M1), and a planetary screw drive (SD1). The screw drive (SD1) drivingly interconnects the electric motor (M1) with the casing (C1) for causing the casing to move axially in response to operation of the motor. The actuator (A1) is connected to the propeller (P1) by a linkage (L1) so that movement of the casing causes the propellers to change their pitch. A second actuator (A2) may be housed within the hub (H1) and connected to the first actuator (A1) for providing redundancy in the event of failure of the first actuator.
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Translor, catalogue, by: La Technique Integrale.
Miyatake Henry J.
Sakurai Seiya
Kaser Bruce A.
Powell Jr. Everette A.
The Boeing Company
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