Variable-pitch fan with low pitch of a turbine engine
AssigneeSafran Aircraft Engines
InventorsNils Edouard Romain Bordoni, Michel Gilbert Roland Brault, Romain Guillaume Cuvillier, Guillaume Patrice Kubiak, Arnaud Nicolas Negri, Nathalie Nowakowski
Life of this patent
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Abstract
A fan of a turbine engine, the fan including a fan disk provided with blades on its periphery, the blades being pivotally mounted on the disk around a pivoting axis and having a center of gravity, and a pitch change mechanism for the blades, each blade being configured so that its center of gravity is positioned on or at a small distance from a fictitious plane which passes through the pivoting axis of the blade and which is perpendicular to the axis of revolution of the fan when the blade is in a minimum drag position.
Claims11
A fan of a turbine engine, said fan comprising:
- a disk of annular overall shape and defining an axis of revolution of the fan, said disk being provided with blades at a periphery thereof, each blade being pivotally mounted on the disk around a pivoting axis and having a center of gravity, and a pitch change mechanism of each blade, said pitch change mechanism being configured to adjust an angular position of each blade around the pivoting axis, wherein each blade has a first portion, which extends in an airstream of the fan, and a second portion, which extends outside said airstream, a center of gravity of the second portion of each blade extending substantially on the pivoting axis while a center of gravity of the first portion of each blade is offset with respect to said pivoting axis by being on a fictitious plane or at a small distance from a fictitious plane which passes through the pivoting axis of each blade and which is perpendicular to the axis of revolution of the fan when each blade is in a minimum drag position.
A turbine engine comprising a fan housed in a fan casing, said fan comprising:
- a disk of annular overall shape and defining an axis of revolution of the fan, said disk being provided with blades at a periphery thereof, each blade being pivotally mounted on the disk around a pivoting axis and having a center of gravity, and a pitch change mechanism of each blade, said pitch change mechanism being configured to adjust an angular position of each blade around the pivoting axis, wherein each blade has a first portion, which extends in an airstream of the fan and a second portion, which extends outside said airstream, a center of gravity of the second portion of each blade extending substantially on the pivoting axis while a center of gravity of the first portion of each blade is offset with respect to said pivoting axis by being on a fictitious plane or at a small distance from a fictitious plane which passes through the pivoting axis of each blade and which is perpendicular to the axis of revolution of the fan when each blade is in a minimum drag position.
Dependencies are inferred from the claim text.