Lever arm device for controlling the pitch of fan blades of a turbine engine having an unducted fan
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United States of America Patent
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Oct 15, 2019
Grant Date -
Nov 30, 2017
app pub date -
Apr 25, 2016
filing date -
May 12, 2015
priority date (Note) -
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Abstract
A device for controlling the pitch of fan blades in a turbine engine having an unducted fan including at least one set of adjustable pitch fan blades, each fan blade being coupled, for pitch adjustment purposes, to a radial control shaft constrained to rotate with the set of fan blades and suitable for pivoting about a radial pitch axis of the fan blade, the device including a stationary actuator centered on a longitudinal axis of the turbine engine and driving an outer ring of a load transfer bearing in translation, the outer ring of the load transfer bearing being coupled directly to a lever arm of each control shaft via a respective ball joint connection in order to adjust its pivoting.
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