Split Planet Carrier Cage for Aircraft Reducer Satellite Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The assembly of satellites in the cage of a speed reducer for an aircraft turbomachine can be challenging due to the rigid connection of the cage, which makes it difficult to transmit loads and maintain proper positioning of satellite guide levels.
Innovation Solution
A school rack design featuring a cage with two rooms, where one room includes axial protrusions with free ends that are fixed to the other room using screws, allowing for clamping and precise alignment of the cage parts, thereby facilitating load transmission and satellite positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the cage is made as a single rigid piece, then the structural strength is improved, but the ease of manufacture deteriorates due to difficulty in assembling satellites
Solution Approach 1:
The cage is divided into two separate parts: a first part comprising one wall and the bridges, and a second part comprising the other wall. This segmentation allows satellites to be assembled into the first part before the two parts are joined together, significantly easing the assembly process while maintaining structural integrity through the rigid connection of the two parts
2Ease of manufacture
If the cage is divided into multiple parts, then the ease of manufacture is improved, but the device complexity increases due to additional connection requirements
Solution Approach 1:
The cage is divided into two parts that are connected through the bridges. The bridges serve as the connection element between the two parts, providing a straightforward joining mechanism that reduces complexity compared to more elaborate connection systems
Solution Approach 2:
The bridges serve multiple functions: they connect the two parts of the cage, provide mounting locations for satellites, and maintain the structural rigidity of the assembly. This multi-functionality reduces the need for additional separate components
3Force
If the cage parts are rigidly connected, then the load transmission is improved, but the ease of operation deteriorates due to difficulty in positioning satellites
Solution Approach 1:
The cage is segmented into two parts that can be assembled separately with satellites positioned in the first part. After assembly, the two parts are rigidly connected through the bridges, ensuring proper load transmission while maintaining the positioning accuracy achieved during the assembly phase
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A satellite carrier (213) for a speed reducer (10) of an aircraft turbomachine (1), comprising: - a cage carrier (222), - a cage (220), characterized in that the cage (220) comprises two parts (220a, 220b): - a first part (220a) comprising a wall (236) and brackets (240a1, 240b1), these brackets (240a1, 240b1) projecting axially from a face (236a) of this wall (236) and comprising first axial ends (293) connected to this face (236a) and second free axial ends (294), and - a second part (220b) comprising another wall (238), this other wall (238) comprising a face (238a) on which the free ends (294) of the bridges (240a1, 240b1), and in that the two parts (236, 238) of the cage (220) are fixed together by fastening means (299).