Eccentric Ring Axial Adjustment for Thrust Reverser Actuator Alignment
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Solution Overview
Problem
The existing thrust reverser systems for turbojet engines face misalignment issues due to geometric dispersions in the assembly of parts, leading to malfunctions and requiring time-consuming manual adjustments of wedges or expensive adjustable actuating elements, which increase weight and maintenance delays.
Innovation Solution
A thrust reverser system with a fixed structure, a movable cowl, and displacement actuators, featuring an adjustment device that compensates for positioning defects by adjusting the anchoring positions, eliminating the need for manual adjustments and reducing wear on actuators through a gimbal joint or eccentric ring mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual adjustment of wedges or adjustable actuating elements is used to compensate for positioning defects, then positioning precision is improved, but device complexity and weight increase
Solution Approach 1:
The system uses self-adjusting elements that automatically compensate for positioning defects without requiring manual intervention. The adjustment mechanism is integrated into the assembly process itself, allowing the system to self-correct geometric dispersions through the inherent flexibility and adjustability of the connections between fixed structure parts and the cowl.
Solution Approach 2:
The invention allows for adjustment of geometric parameters (positions and orientations) of the fixed structure parts relative to each other. By changing these parameters during assembly, the system can compensate for manufacturing tolerances and positioning defects without adding complex adjustment mechanisms.
2Manufacturing precision
If manual adjustment of wedges or adjustable actuating elements is used to compensate for positioning defects, then positioning precision is improved, but weight increases
Solution Approach 1:
The system uses self-adjusting elements that automatically compensate for positioning defects without requiring manual intervention. The adjustment mechanism is integrated into the assembly process itself, allowing the system to self-correct geometric dispersions through the inherent flexibility and adjustability of the connections between fixed structure parts and the cowl.
Solution Approach 2:
Instead of using expensive and heavy adjustable actuating elements, the invention employs simpler, lighter adjustment mechanisms that can be easily replaced or adjusted. The focus is on using cost-effective and lightweight solutions that achieve the same positioning precision.
3Device complexity
If conventional actuating elements are used without adjustment capability, then device complexity is reduced, but positioning precision deteriorates
Solution Approach 1:
The invention introduces dynamic adjustability to otherwise fixed connections. The adjustment capability is built into the assembly process, allowing the positions and orientations of fixed structure parts to be optimized during assembly. This dynamic adjustment during assembly compensates for geometric dispersions without requiring complex adjustable mechanisms during operation.
Solution Approach 2:
The adjustment of positioning defects is performed during the assembly process itself, before the system enters operation. By addressing positioning precision issues during assembly through careful positioning and adjustment of fixed structure parts, the need for complex adjustable mechanisms during operation is eliminated.
4Device complexity
If geometric dispersions in assembly are not compensated, then device complexity is reduced, but reliability deteriorates due to malfunctions
Solution Approach 1:
The invention introduces dynamic adjustability to otherwise fixed connections. The adjustment capability is built into the assembly process, allowing the positions and orientations of fixed structure parts to be optimized during assembly. This dynamic adjustment during assembly compensates for geometric dispersions without requiring complex adjustable mechanisms during operation.
Solution Approach 2:
The adjustment of positioning defects is performed during the assembly process itself, before the system enters operation. By addressing positioning precision issues during assembly through careful positioning and adjustment of fixed structure parts, the need for complex adjustable mechanisms during operation is eliminated.
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
This solution ensures correct axial positioning of displacement actuators, reduces maintenance time, and decreases the effort on actuators, thereby minimizing malfunctions and weight, while allowing for efficient operation and reduced maintenance efforts.
Implementation Method 1
the adjustment device comprises an eccentric ring configured to adjust the first anchoring position of the displacement actuator relative to the fixed structure
Data Source
AI summary
Disclosed is a thrust reverser for a device receiving a propulsion element, such as a turbojet engine nacelle. The thrust reverser includes a stationary structure having a deflector deflecting at least a portion of the air flow that is to flow through the nacelle, a translatably movable cap that can be in a closed position in which the cap covers the deflector deflecting the air flow and an open position in which the cap opens the deflector deflecting the air flow, and at least one moving actuator configured to move the cap between the open and closed positions. The moving actuator includes a stationary portion designed to be attached to the stationary structure in a first securing position and a movable portion designed to be attached to the cap in a second securing position. An adjusting device adjusts the first securing position.