Gas Turbine Bracket Boss Cavity Design
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Solution Overview
Problem
Existing brackets for mounting payloads on gas turbine engines are heavy due to the need to withstand payload weight and external vibrating loads, which can be mitigated by improving the structural design of mounting bosses to reduce weight while maintaining strength.
Innovation Solution
The proposed bracket features a mounting boss with a cavity and ribs surrounding a hole, configured to resist compressive forces, where the cavity is formed using an additive manufacturing process to minimize material usage and weight, and the ribs provide additional support for the fixing support face.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If traditional solid mounting boss design is used, then structural strength is sufficient to withstand compressive forces and vibrating loads, but bracket weight increases
Solution Approach 1:
The mounting boss incorporates a cavity structure instead of being completely solid, creating a porous-like configuration that reduces material usage and weight while maintaining sufficient strength through strategic material distribution in the wall and rib structures
Solution Approach 2:
The mounting boss is segmented into distinct functional regions including a cavity, wall surrounding the hole, and ribs extending into the cavity. This segmentation allows each region to be optimized for its specific function - the wall provides structural integrity, the ribs provide localized support, and the cavity reduces weight
2Quantity of substance
If cavity is added to mounting boss, then material usage is reduced and weight decreases, but structural integrity may be compromised
Solution Approach 1:
The cavity is designed with curved surfaces and rounded transitions rather than sharp corners, which reduces stress concentration points and maintains structural integrity while maximizing material removal for weight reduction
Solution Approach 2:
The cavity extends in the axial direction of the hole, creating a three-dimensional void space that maximizes material reduction while the ribs provide structural reinforcement in radial directions, effectively using dimensional strategy to balance weight and strength
Data Source
AI summary
A bracket for mounting a first component to a second component, the bracket comprising at least one mounting boss defining a through-hole having an opening axis in axial direction for receiving a fixing used to attach the bracket to one of the first and second components; wherein the mounting boss comprises a fixing support face around the through-hole on a surface of the bracket, the fixing support face configured to bear a head of the fixing; the mounting boss is configured to resist compressive forces exerted on the bracket by the head of the fixing; and the mounting boss comprises a cavity in a space projected from the fixing support face in the axial direction of the through-hole.