System for controlling stages of variable-pitch stator vanes in a turbomachine
First Claim
1. A system for controlling two stages of variable-pitch stator vanes of a turbomachine, each stage including a plurality of vanes each pivotally mounted on a casing of the turbomachine, and a control ring for each stage surrounding the casing and connected to each of the vanes of the stage via levers, the control system comprising a drive element for turning a first control ring of one of the stages via a leader member pivotally mounted on the casing, and a synchronization bar for transmitting the turning movement of the first control ring driven by the drive element to a second control ring of the other stage via a follower member pivotally mounted on the casing, the system further comprising an additional pivot member interposed between the follower member and the second control ring, said additional pivot member being pivotally mounted both on the casing and on the follower member.
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Accused Products
Abstract
A system for controlling two stages of variable-pitch stator vanes of a turbomachine, the system comprising a drive element for turning the control ring of one of the stages via a leader member pivotally mounted on the casing, a synchronization bar for transmitting the turning movement of the ring driven by the drive element to the control ring of the other stage via a follower member pivotally mounted on the casing, and an additional pivot member interposed between the follower member and the follower ring, said additional pivot member being pivotally mounted both on the casing and on the follower member.
39 Citations
8 Claims
- 1. A system for controlling two stages of variable-pitch stator vanes of a turbomachine, each stage including a plurality of vanes each pivotally mounted on a casing of the turbomachine, and a control ring for each stage surrounding the casing and connected to each of the vanes of the stage via levers, the control system comprising a drive element for turning a first control ring of one of the stages via a leader member pivotally mounted on the casing, and a synchronization bar for transmitting the turning movement of the first control ring driven by the drive element to a second control ring of the other stage via a follower member pivotally mounted on the casing, the system further comprising an additional pivot member interposed between the follower member and the second control ring, said additional pivot member being pivotally mounted both on the casing and on the follower member.
Specification