Flexible Hose Composite Structure for Extreme Pressure
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Solution Overview
Problem
Existing hoses used in aerospace and military applications fail or deteriorate under extreme conditions such as high altitude and temperature variations, leading to potential catastrophic failures in critical systems due to inability to maintain high pressure and flexibility.
Innovation Solution
A flexible hose design comprising a flexible conduit supported by a chemically stable polymer inner support and surrounded by a compression layer, with optional coil or thread formations and an outer sleeve, utilizing materials like PTFE, stainless steel, and Nomex for durability and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hoses are used in extreme conditions, then they can function in normal operating conditions, but they fail or deteriorate under extreme temperatures and high pressure
Solution Approach 1:
The hose employs a composite structure combining stainless steel conduit for strength and pressure resistance, PTFE inner support for chemical stability and flexibility, and Nomex compression layer for durability. This multi-material composite approach allows the hose to withstand extreme temperatures and pressures while maintaining reliability.
Solution Approach 2:
The hose structure nests multiple functional layers: the PTFE inner support is nested within the stainless steel conduit, which is in turn surrounded by the Nomex compression layer. This nested configuration allows each material to perform its specific function while working together to resist extreme environmental conditions.
2Strength
If the hose is made strong and durable to withstand high pressure, then it can handle 5000 psi, but it may lose flexibility in dynamic applications
Solution Approach 1:
Different layers of the hose have specialized local properties: the stainless steel conduit provides localized strength for pressure containment, the PTFE inner support provides localized flexibility for dynamic movement, and the Nomex compression layer provides localized durability. This distribution of qualities across layers resolves the contradiction between overall strength and flexibility.
Solution Approach 2:
The hose is segmented into distinct functional layers rather than using a single homogeneous material. Each layer (conduit, inner support, compression layer) is optimized for its specific function, allowing the composite structure to achieve both high strength and flexibility simultaneously.
3Reliability
If the hose uses complex multi-layer construction to improve durability, then it performs better in extreme conditions, but the device complexity increases
Solution Approach 1:
Each layer of the hose serves multiple functions: the stainless steel conduit provides both structural strength and a barrier layer; the PTFE inner support provides both flexibility and chemical stability; the Nomex compression layer provides both durability and maintains the hose shape. This multi-functionality reduces the need for additional specialized layers, managing complexity while improving reliability.
Data Source
AI summary
A flexible hose comprising: a flexible conduit for carrying a pressurized fluid; a flexible inner support for supporting the conduit; and a compression layer surrounding the flexible conduit.