Aircraft Engine Mount Segmentation for High Bypass Ratio Space
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Aircraft engine mounts with high bypass ratio turbofan engines face challenges in maintaining structural strength while minimizing size and maximizing space usage, leading to increased weight and reduced housing space for devices due to longer rear engine mounts, which necessitate thicker components and reduced space efficiency.
Innovation Solution
The engine mount is configured with a front and rear engine mount system where the rear engine mount is divided into an engine side mount member and a pylon side mount member, with plate-shaped main mount members and a reinforcing mount member to enhance support strength and maintainability, allowing for reduced lengths and improved space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the rear engine mount becomes large in length to accommodate high bypass ratio engines, then the engine can be mounted, but the moment of force increases requiring thicker components leading to increased weight
Solution Approach 1:
The rear engine mount is divided into two separate components: an engine side mount member and a pylon side mount member. This segmentation allows each component to be optimized independently, reducing the overall moment of force requirements and enabling lighter weight construction while maintaining adaptability to high bypass ratio engines.
Solution Approach 2:
The engine side mount member extends in the width direction rather than increasing length in the vertical direction. This dimensional change allows accommodation of high bypass ratio engines without increasing the moment arm, thereby avoiding the need for thicker components and reduced weight.
2Adaptability or versatility
If the rear engine mount becomes large in length, then the engine can be mounted, but the housing space for devices becomes small reducing space effectiveness
Solution Approach 1:
Dividing the rear engine mount into separate engine side and pylon side members creates compact individual components that occupy less overall space, thereby increasing the available housing volume for various devices in the nacelle while maintaining compatibility with high bypass ratio engines.
Solution Approach 2:
By extending the engine side mount member in the width direction rather than increasing vertical length, the design preserves vertical housing space in the nacelle, allowing effective utilization of available volume for mounting various devices.
3Strength
If the rear engine mount is made thick to secure strength, then the strength is sufficient, but the weight increases
Solution Approach 1:
Segmenting the rear engine mount into separate components allows the force distribution to be optimized, reducing the moment of force on each individual component. This enables the use of thinner, lighter materials while maintaining sufficient overall strength for the engine mounting application.
Solution Approach 2:
Extending the engine side mount member in the width direction provides structural strength without increasing the vertical thickness of components. This dimensional approach maintains strength requirements while minimizing weight by avoiding unnecessary material in the vertical dimension.
Data Source
AI summary
An engine mount of an aircraft and an aircraft are provided, which can reduce a size of an engine mount and can effectively use a space in an engine nacelle even in an engine with a high bypass ratio. An engine core section 20b at a rear of an engine 20 is supported by a rear engine mount 40 comprising an engine side mount member 41 fixed to a side of the engine 20 and a strut side mount member 42 fixed to a side of a pylon strut 11. The rear engine mount 40 is divided into the engine side mount member 41 and the strut side mount member 42, and thereby, even in the engine 20 with a high bypass ratio in which an outside diameter of the fan section 20a and the outside diameter of the engine core section 20b significantly differ, the lengths in the vertical direction of the engine side mount member 41 and the strut side mount member 42 are suppressed.