Wheel Hub Seal Structure Using Polymerizing Liquid Gasket
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Solution Overview
Problem
Conventional sealing devices for wheel hub units fail to completely prevent infiltration of liquids and contaminants between the annular stop edge and collar, leading to oxidation and rust formation, and are cumbersome due to the use of liquid sealing substances that can spread and seep.
Innovation Solution
A sealing device comprising a sheet metal or plastic screen with a cylindrical side wall and annular stop edge, combined with an anaerobic sealing liquid gasket that polymerizes within a closed seat to form a robust, chemical-resistant seal, preventing water and contaminants from entering the wheel hub unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid sealing substances are used to seal the gap between annular stop edge and collar, then sealing capability is improved, but the device becomes cumbersome due to spreading and seeping issues
Solution Approach 1:
The patent changes the physical state of the sealing material from liquid to polymerizable liquid (anaerobic sealing liquid). This parameter change allows the sealing liquid to remain in liquid form during application for easy filling, then transforms into a solid polymerized state to provide reliable sealing without the spreading and seeping problems of conventional liquid sealants.
Solution Approach 2:
The patent utilizes phase transition of the anaerobic sealing liquid from liquid to solid through polymerization. The sealing liquid is applied in liquid form to fill the gap, then undergoes phase transition to solid polymerized state, providing both ease of application and reliable sealing performance without the drawbacks of liquid sealants.
2Reliability
If liquid sealing substances are used, then sealing capability is improved, but oxidation and rust formation occur due to incomplete prevention of liquid infiltration
Solution Approach 1:
The patent changes the sealing material from conventional liquid to anaerobic polymerizable liquid. This parameter change enables the sealing material to polymerize and form a solid barrier that completely prevents liquid infiltration, thereby eliminating oxidation and rust formation while maintaining sealing capability.
Solution Approach 2:
The patent uses composite material approach by combining the anaerobic sealing liquid with the metal surfaces (annular stop edge and collar) to form a sealed assembly. The polymerized sealing liquid creates a composite structure that provides both sealing and corrosion protection.
3Reliability
If elastomer elements are used for sealing, then sealing performance is achieved, but assembly complexity increases due to handling precautions required
Solution Approach 1:
The patent extracts the elastomer element from the sealing system and replaces it with anaerobic sealing liquid applied directly in the gap between annular stop edge and collar. This eliminates the need for separate elastomer component handling, installation, and associated precautions, simplifying the assembly process while maintaining sealing performance.
Solution Approach 2:
The patent uses anaerobic sealing liquid as an intermediary substance that fills and seals the gap between metal surfaces. This intermediary approach replaces the need for elastomer elements, providing sealing performance through the liquid's polymerized form while simplifying assembly by eliminating elastomer handling requirements.
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 provides a reliable, long-lasting seal that reduces the risk of oxidation and rust, is easy to apply without risk of spillage, and simplifies assembly by eliminating the need for elastomer elements and liquid handling precautions, offering superior sealing performance compared to traditional methods.
Implementation Method 1
an anaerobic sealing liquid gasket that polymerizes within a closed seat to form a robust, chemical-resistant seal
Data Source
AI summary
Sealing device for a wheel hub unit is disclosed herein, wherein the sealing device being able, during use, to form a static seal for protecting the wheel hub unit from any environmental pollutant and being provided with a screen, which is engaged with a collar of the wheel hub unit and has a bottom wall, a cylindrical side wall integral with and more or less perpendicular to the bottom wall. The sealing device is designed and structured to protect the wheel hub unit from any environmental contaminant that the wheel hub unit may be exposed to during usage.