Composite Working Cylinder Tube for Pressure Resistance and Recyclability
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Solution Overview
Problem
Existing fluid-actuated working cylinders face challenges in being cost-effective and resource-efficient while maintaining performance, particularly in terms of material usage and recyclability.
Innovation Solution
A fluid-actuated working cylinder with a composite cylinder tube design, featuring a thin, diffusion-tight glass or ceramic inner layer for sealing and a cellulose-containing or lignin-containing support jacket for radial support, allowing for low-wear, low-friction piston movement and sustainable production methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the cylinder tube is made entirely of thick metal or plastic material, then the mechanical strength and pressure resistance are sufficient, but the material consumption increases and recyclability decreases
Solution Approach 1:
The cylinder tube is constructed as a composite body with a glass or ceramic inner layer (0.1-10 mm thick) providing diffusion-tight sealing, and an outer support jacket made of metal, plastic, or fiber-reinforced material providing mechanical strength and pressure resistance. This composite structure allows the inner layer to be much thinner than conventional single-material cylinders while maintaining both sealing and strength requirements.
Solution Approach 2:
The cylinder tube is divided into functionally distinct layers: the inner glass/ceramic layer handles sealing and diffusion resistance, while the outer support jacket handles mechanical loading and pressure resistance. This segmentation allows each layer to be optimized for its specific function, reducing overall material consumption.
2Loss of substance
If the inner layer is made very thin to reduce material consumption, then resource efficiency improves, but the mechanical stability and load-bearing capacity deteriorate
Solution Approach 1:
The thin glass or ceramic inner layer (0.1-10 mm) is combined with an outer support jacket that provides the necessary mechanical stability and load-bearing capacity. The support jacket is designed specifically to compensate for the reduced thickness of the inner layer, ensuring overall structural integrity while minimizing material consumption.
Solution Approach 2:
Different parts of the cylinder wall have different material properties optimized for their local function: the inner layer provides diffusion-tight sealing with minimal thickness, while the outer support jacket provides mechanical strength and stability. This local optimization allows the inner layer to be very thin without compromising overall mechanical stability.
3Ease of manufacture
If conventional single-material construction is used, then manufacturing simplicity is maintained, but resource efficiency and recyclability worsen
Solution Approach 1:
The composite construction with a glass or ceramic inner layer and an outer support jacket enables resource-efficient manufacturing. The inner layer can be produced by established processes such as glass blowing, extrusion, or lining, while the outer jacket can be manufactured separately and assembled, allowing for optimized production and improved recyclability of each component.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables the production of a cost-effective, resource-conserving fluid-actuated working cylinder with low manufacturing costs, high operational reliability, and recyclability, while maintaining the performance of conventional cylinders.
Implementation Method 1
the inner layer consists of a diffusion-tight, in particular diffusion resistant, glass material or diffusion-tight, in particular diffusion resistant, ceramic material
Implementation Method 2
the support jacket has a cellulose-containing and/or lignin-containing material structure... the support jacket surrounding the inner layer, which radially supports the inner layer from the outside and gives the inner layer the necessary dimensional stability
Implementation Method 3
to define a very smooth piston running surface against which the piston arranged in the cylinder chamber bears with low friction so that extremely low-wear stroke movements of the piston are possible
Data Source
AI summary
A fluid-actuated working cylinder having a cylinder housing enclosing a cylinder chamber and having a cylinder tube whose inner circumferential surface forms a piston running surface for a piston arranged in the cylinder chamber wherein the cylinder tube is a composite body having a tubular inner layer and a tubular support jacket surrounding the tubular inner layer with a radial support effect and wherein the tubular inner layer is made of a diffusion-tight glass material or ceramic material, while the support jacket has a cellulose-containing and/or lignin-containing material structure.