Helically Wound Multi-Layer Tubes for Lightweight Precision Control
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Solution Overview
Problem
Existing methods for manufacturing tubular structures, such as pipes, result in products that are heavy, difficult to modify, and lack precision in defining inside dimensions, wall thickness, and exterior dimensions, with limited ability to integrate diverse materials and components like insulation zones and sensors.
Innovation Solution
A helically wound tubular structure is formed by winding multiple layers of sheet metal around a mandrel, allowing for precise control over interior and exterior dimensions, integration of different materials, and inclusion of features like voids and insulation zones, using methods like laser cutting and adhesive bonding to enhance strength-to-weight properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional welded or seamless pipe manufacturing methods are used, then structural strength and rigidity are achieved, but the tubular structures become heavy and have limited design flexibility
Solution Approach 1:
The tubular structure is segmented into multiple functional layers: an inner tube layer for structural integrity, an intermediate insulation layer with thermal barriers, and an outer protective layer. This segmentation allows each layer to be optimized independently, reducing overall weight while maintaining structural strength through the coordinated design of multiple specialized layers rather than a single heavy-walled tube
Solution Approach 2:
The patent employs composite material construction with at least three different materials across the tube wall thickness. The inner layer uses materials optimized for structural strength, the intermediate layer uses low thermal conductivity materials for insulation, and the outer layer uses materials for environmental protection. This composite approach achieves the required structural strength with significantly reduced weight compared to traditional homogeneous thick-walled pipes
2Productivity
If traditional pipe manufacturing methods are used, then production efficiency is maintained, but precision control over inside dimensions, wall thickness, and exterior dimensions is limited
Solution Approach 1:
The mandrel is pre-configured with the exact final dimensions of the tubular structure before the winding process begins. The mandrel's surface profile, including all contours and features, is precisely manufactured in advance. This preliminary action ensures that the helically wound tube automatically achieves the desired dimensional precision as it conforms to the mandrel's pre-established geometry, eliminating the need for subsequent heavy machining operations
Solution Approach 2:
The patent controls dimensional parameters by adjusting the helical winding parameters including wrap angle, layer spacing, and tension forces during the winding process. By changing these process parameters, the tube wall thickness and dimensional accuracy are precisely controlled in real-time during manufacturing, maintaining both high productivity and manufacturing precision
3Stability of the object's composition
If traditional pipe manufacturing methods are used, then structural integrity is achieved, but the ability to integrate diverse materials, insulation zones, and components like sensors is limited
Solution Approach 1:
The tube wall is segmented into multiple independent layers that can be constructed from different materials. This segmentation allows integration of thermal insulation layers, reflective barriers, and sensor embedding zones within the wall structure itself, while the outer structural layers maintain overall structural integrity. Each layer can be optimized for its specific function without compromising the whole
Solution Approach 2:
The patent implements a nested multi-layer structure where functional components are embedded within the tube wall layers. Sensors, insulation materials, and other components are nested between the structural layers, allowing the tube to incorporate diverse functionalities while maintaining a compact, structurally sound configuration. The helical winding process naturally creates these nested layers as each subsequent layer is wound over the previous one
4Weight of moving object
If seamless tube methods are used, then lighter weight and thinner walls are achieved, but the consistency, straightness, and suitability for high stress applications are reduced
Solution Approach 1:
The helical winding process allows different sections of the tube to have locally optimized properties. The winding tension, wrap angle, and layer density can be adjusted along the length of the tube to achieve uniform wall thickness and exceptional straightness throughout. This local control during manufacturing ensures high consistency and reliability for structural applications while maintaining lightweight construction
Data Source
AI summary
A helically wound tubular structure formed from helically wound sheet metals is disclosed. The tubular structure has a first sheet metal helically wound about a longitudinal axis. A second sheet metal having voids disposed therein is helically wound about the longitudinal axis and coaxially about the first sheet metal. A third sheet metal is helically wound about the longitudinal axis and coaxially about the first sheet metal and the second sheet metal.