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US 9,429,169 B2Granted
Turbine engine having a stage of variable-pitch stator vanes with independent control
AssigneeSnecma
InventorsMichel Andre Bouru, Daniel Germain Alexis Kettler
Life of this patent
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Abstract
A turbine engine including a stator including variable-pitch vanes that are controlled stage by stage. An actuator ring connected by crank-arms to the variable-pitch vanes is coupled to at least one adjacent specific drive unit in a general form of an actuator.
Claims11
A turbine engine comprising:
- a casing housing at least one stator stage including variable-pitch vanes controlled by an actuator ring coaxially surrounding the casing, wherein the ring is constrained to move in turning only about an axis of the casing and being connected by crank-arms to the variable-pitch vanes,
- wherein the actuator ring is coupled to at least one adjacent specific drive unit generally in a form of an actuator and comprising first and second portions forming a cylinder and a rod extending from the cylinder, wherein the first portion is hinged to the casing, and the second portion is directly hinged to a lateral extension of the ring, the lateral extension of the ring being rotationally stationary relative to the ring,
- wherein the rod is directly hinged to the ring and the cylinder is hinged to the casing, and
- wherein the hinge between the cylinder and the casing is arranged in a vicinity of an end of the cylinder from which the rod extends.
1 more element
A turbine engine comprising:
- a casing housing several stator stages including variable-pitch vanes, each stator stage being controlled independently by an actuator ring coaxially surrounding the casing, wherein said ring is constrained to move in turning only about an axis of the casing and being connected by crank-arms to the variable-pitch vanes of said stator stage,
- wherein each actuator ring is coupled to at least one adjacent specific drive unit generally in a form of an actuator and comprising first and second portions forming a cylinder and a rod extending from the cylinder, wherein the first portion is hinged to the casing, and the second portion is directly hinged to a lateral extension of the ring, the lateral extension of the ring being rotationally stationary relative to the ring.
Dependencies are inferred from the claim text.