Variable pitch fan pitch range limiter
First Claim
1. A variable pitch fan for a gas turbine engine, the variable pitch fan comprising:
- a plurality of fan blades rotatably coupled to a disk, each of the plurality of fan blades defining a pitch; and
an actuation assembly for changing a pitch of each of the plurality of fan blades, the actuation assembly includingan actuation member operably connected to at least one of the plurality of fan blades and defining a channel, wherein the actuation member is a scheduling ring rotatable relative to the disk; and
a pin moveable between a first position in which the pin is positioned at least partially in the channel defined in the actuation member and a second position, the pin blocking movement of the actuation member relative to the pin past a range defined by the channel when in the first position; and
a retraction system for selectively engaging the pin and moving the pin from the first position to the second position.
1 Assignment
0 Petitions
Accused Products
Abstract
A variable pitch fan for gas turbine engine is provided. The variable pitch fan includes a plurality of fan blades rotatably coupled to a disk and an actuation assembly for changing a pitch of each of the plurality of fan blades. The actuation assembly generally includes an actuation member operably connected to at least one of the plurality of fan blades and a pin. The pin is movable between a first position in which the pin is positioned at least partially in a channel defined in the actuation member, and a second position. The pin blocks movement of the actuation member relative to the pin past a range defined by the channel when in the first position. The actuation assembly further includes a retraction system for selectively engaging the pin in moving the pin from the first position to the second position.
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Citations
18 Claims
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1. A variable pitch fan for a gas turbine engine, the variable pitch fan comprising:
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a plurality of fan blades rotatably coupled to a disk, each of the plurality of fan blades defining a pitch; and an actuation assembly for changing a pitch of each of the plurality of fan blades, the actuation assembly including an actuation member operably connected to at least one of the plurality of fan blades and defining a channel, wherein the actuation member is a scheduling ring rotatable relative to the disk; and a pin moveable between a first position in which the pin is positioned at least partially in the channel defined in the actuation member and a second position, the pin blocking movement of the actuation member relative to the pin past a range defined by the channel when in the first position; and a retraction system for selectively engaging the pin and moving the pin from the first position to the second position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A variable pitch fan for a gas turbine engine, the variable pitch fan comprising:
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a plurality of fan blades rotatably coupled to a disk, each of the plurality of fan blades defining a first pitch range and a second pitch range; and an actuation assembly for changing a pitch of the plurality of fan blades, the actuation assembly including an actuation member operably connected to at least one of the plurality of fan blades, the actuation member defining a first range of motion corresponding to the first pitch range and a second range of motion corresponding to a second pitch range, the actuation member further defining a channel, wherein the actuation member is a scheduling ring rotatable relative to the disk; and a pin moveable between a first position in which the pin is positioned at least partially in the channel defined in the actuation member and a second position, the pin blocking the actuation member from the second range of motion when the pin is in the first position; and a retraction system for selectively engaging the pin and moving the pin from the first position to the second position. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification