Stage of variable pitch vanes for turbomachines
By using levers to connect the control ring to the housing in the variable pitch blade stage of the turbine, the problems of control ring deformation and motion jamming were solved, achieving high reliability and low cost of assembly and maintenance.
CN122122374APending Publication Date: 2026-05-29SAFRAN AIRCRAFT ENGINES SAS
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SAFRAN AIRCRAFT ENGINES SAS
- Filing Date
- 2024-10-24
- Publication Date
- 2026-05-29
AI Technical Summary
Technical Problem
In the existing technology, the variable pitch turbine blade stage has shortcomings in the guidance and deformation of the control loop, which leads to motion jamming, damage and pitch error, and is complicated to assemble and maintain.
Method used
Levers are used instead of support and guide pads. The control ring is connected to the annular housing via levers, which limits the radial and axial deformation of the control ring and optimizes the accuracy of pitch setting.
Benefits of technology
It improves the reliability and assembly efficiency of the variable pitch blade stage, reduces the risk of motion jamming and damage, and lowers cost and space requirements.
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Smart Images
Figure CN122122374A_ABST
Abstract
The invention relates to a stage (1) of variable-pitch vanes (2), comprising: - a row of vanes (2), - a casing having a rotation axis (X), and - a ring (5) for controlling the pitch of the vanes (2), the ring comprising: - a main body (50) extending around the casing, - first members for connecting the main body (50) to cylindrical pivots (22) of said vanes (2), - second members (70) for connecting the main body (50) to actuators (7) carried by the casing, and - third members (8) for guiding the main body (50) around and at a distance from the casing, wherein said third members (8) comprise levers (80), each lever comprising a first end (80a) articulated to the casing around a radial axis (R 80a ) with respect to the axis (X) and a second end (80b) connected to the main body (50).
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