Hydrophobic Movable Component Seal for Fluid Penetration
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Solution Overview
Problem
Existing sealing technologies for movable components in devices are either not completely leakproof or generate additional friction, and they are often expensive and complex, especially in applications requiring protection from fluids, gases, bacteria, and other microorganisms.
Innovation Solution
The use of hydrophobic surface regions at the gap points between movable components and the housing, which are designed parallel to the movement axis, prevents fluid penetration by altering surface tension, allowing for a frictionless, leakproof, and antibacterial seal without additional components or structural changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If contact seals are used at movable components, then sealing effectiveness is improved, but additional friction is generated
Solution Approach 1:
The patent replaces mechanical contact seals with a non-contact sealing system using hydrophobic surfaces. The movable component features a hydrophobic surface that repels water through surface tension effects, eliminating the need for physical contact between sealing surfaces. This substitution of mechanical sealing with physicochemical surface properties resolves the contradiction by providing effective sealing without friction.
Solution Approach 2:
The patent changes the surface energy parameters of the movable component by applying hydrophobic coating or treatment. This parameter change in surface wettability (from hydrophilic to hydrophobic) enables the surface to repel water and other fluids through altered surface tension characteristics, achieving sealing effectiveness without mechanical contact and thus without friction.
2Force
If non-contact seals are used, then friction is reduced, but sealing effectiveness deteriorates
Solution Approach 1:
The patent applies hydrophobic surface treatment to the movable component, changing the surface energy parameters to create water-repelling properties. This parameter change enables non-contact sealing to become effective by utilizing surface tension and contact angle effects, where water droplets bead up and roll off the hydrophobic surface rather than penetrating through the gap.
Solution Approach 2:
The patent employs a simple hydrophobic coating or surface treatment that can be applied to the movable component. This inexpensive surface modification provides effective non-contact sealing without requiring complex mechanical structures, making the sealing solution both frictionless and reliable.
3Reliability
If barrier media are used for sealing, then sealing effectiveness is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the sealing function from separate barrier media or additional sealing components and integrates it directly into the movable component itself through hydrophobic surface treatment. The movable component's surface properties alone provide the sealing effect, eliminating the need for separate seals, gaskets, or barrier media, thus reducing device complexity and cost.
Solution Approach 2:
The patent makes the movable component multi-functional by giving it both its primary mechanical function and sealing function through hydrophobic surface properties. The movable component serves dual purposes: performing its intended motion while simultaneously providing water repellency and sealing, thereby eliminating the need for separate sealing components and reducing overall device complexity.
4Reliability
If flexible sleeves are used for sealing, then sealing effectiveness is improved, but cost and complexity increase
Solution Approach 1:
The patent extracts the sealing function from separate flexible sleeves or elastomeric components and integrates it into the movable component through hydrophobic surface treatment. This eliminates the need for separate flexible sealing components, reducing part count, manufacturing steps, and overall cost.
Solution Approach 2:
The movable component provides its own sealing function through hydrophobic surface properties without requiring additional flexible sleeves or elastomeric components. The surface treatment enables the component to self-seal against water penetration, eliminating the need for separate sealing components and their associated manufacturing costs.
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
This solution provides a robust, reliable, and cost-effective seal that prevents fluid and gas penetration, as well as bacterial colonization, while minimizing friction and wear, and is suitable for various environmental conditions, including harsh industrial and medical applications.
Implementation Method 1
Fluids are prevented by the changed surface tension on the hydrophobically-configured surface regions of the gap surfaces
Implementation Method 2
surface regions of the movable component and/or the housing at the passage points of the component are designed to be hydrophobic
Data Source
AI summary
A device includes an interior which is enclosed by a housing. The housing includes an opening. A movable component closes the opening in the housing between the interior and an exterior of the housing. The passage points for movable components have hydrophobic surfaces. A device of this type is protected in a non-contacting manner against penetration and discharge of fluids.