Stator vane stage actuated by a rotary actuator ring moved by electric motor means
AssigneeSnecma
InventorMichel Bouru
Life of this patent
Estimating the term…
Abstract
A variable-pitch stator vane stage in which said vanes are moved by a rotary actuator ring driven by an electric motor. The outer actuator ring is connected by cranks to the vanes and is constrained to move in rotation only, centered on the axis of the turbomachine; the drive system comprises two coaxial portions, an inner portion secured to the casing and an outer portion including the actuator ring, with an electrical drive unit being arranged between the two portions.
Claims11
A variable-pitch stator vane stage comprising vanes arranged in a casing, said vanes being moved by a drive system comprising an actuator ring outside said casing and carried thereby, with said actuator ring being connected to the vanes of said stage by cranks in order to actuate them simultaneously, wherein said actuator ring is constrained to move in rotation only, centered on the axis of said turbomachine, said drive system comprises two coaxial portions, an inner portion secured to the casing and an outer portion including said actuator ring that is connected to said cranks, and that is guided in rotation about said inner portion, and wherein at least one electrical drive unit is arranged between the two portions.
Dependencies are inferred from the claim text.