Variable-Ratio Blade Orientation Drive for Compact Turbomachines
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Solution Overview
Problem
Existing turbomachine systems face challenges with large size and numerous components in their blade orientation adjustment mechanisms, leading to reduced precision and increased complexity.
Innovation Solution
A compact training mechanism with a reduced number of components is introduced, featuring a variable transmission ratio gear floor associated with the second adjustment organ, which adjusts based on the angular position of the motor wheel, allowing for simultaneous and precise adjustment of blade orientations across multiple stages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single shaft is used to drive the blades of two stages of the stator, then the number of components is limited, but the size of the system becomes particularly large
Solution Approach 1:
The drive mechanism is segmented into two independent adjustment devices, each with its own gear stage, allowing compact arrangement of components while maintaining the ability to drive both stator blade stages separately
Solution Approach 2:
The mechanism utilizes the radial dimension by arranging gears and shafts in a radial configuration around the central axis, enabling compact packaging of the drive mechanism without increasing axial length
2Adaptability or versatility
If a control box is used for blade orientation control, then the system adapts to any size turbomachine, but the large number of components reduces system accuracy due to cumulative play and deformations
Solution Approach 1:
The invention extracts and eliminates the intermediate control box from the transmission chain, creating a direct drive connection between the adjustment devices and the stator blades, thereby removing the source of cumulative play and deformation
Solution Approach 2:
The mechanism incorporates variable transmission ratios through adjustable gear stages, allowing dynamic adaptation to different turbomachine sizes and operating conditions while maintaining precision through reduced component count
3Manufacturing precision
If adjustment devices are provided for each stator stage, then precision is maintained, but the number of components and system complexity increases
Solution Approach 1:
The invention merges the drive functions for both stator stages into a unified mechanism with two adjustment devices sharing common structural elements and mounting arrangements, reducing overall system complexity while maintaining independent precision control of each stage
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution achieves a reduction in the mass and size of the training mechanism while maintaining precision in adjusting blade orientations, thereby optimizing turbomachine performance across varying operating conditions.
Implementation Method 1
the gear stage associated with the second adjusting member comprises a first toothed wheel that meshes with the driving wheel, a second toothed wheel that meshes with a toothed portion of the second adjusting member
Data Source
AI summary
The invention concerns a drive mechanism (10) for driving a first adjustment member (12) for adjusting the orientation of the blades (14) of a first turbomachine rectifier stage (16) and a second adjustment member (18) for adjusting the orientation of the blades (20) of a second turbomachine rectifier stage (22), which comprises means for simultaneously moving the two adjustment members (12, 18) in the turbomachine, characterised in that it comprises a single drive wheel (24) that simultaneously drives the first adjustment member (12) and the second adjustment member (18) and comprises two gear stages (26, 28) that are arranged between the drive wheel (24) and one or the other of the first adjustment member (12) and the second adjustment member (18) and that have different transmission ratios.