Profiled Anti-Contamination Lip for Slide Ring Seal
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Solution Overview
Problem
Existing slide ring seals with rubber rings fail to maintain the requisite closing force against penetrating contamination, leading to seal failure and transmission wear-out due to axial forces exerted by contamination, which can result in overheating and damage.
Innovation Solution
A slide ring seal design featuring a projection with a profiled anti-contamination lip on its radial leg, supported on the outer circumferential surface, which forms multiple anti-contamination lips and directs contaminating forces into the housing element, preventing deformation and maintaining the seal's closing force, and incorporating a labyrinth or corrugated profile to solidify and trap contaminants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a secondary seal is added to the slide ring seal, then sealing performance is improved, but the axial force from penetrating contamination still causes the seal to open and reduces closing force
Solution Approach 1:
The invention introduces a profiled anti-contamination lip with a specific geometric profile (triangular, quadrangular, labyrinth, or corrugated) that adds a dimensional feature to the secondary seal. This profiled structure creates multiple sealing surfaces and directs contaminant forces into the housing element, preventing the axial opening force that plagued previous single-surface secondary seals.
2Object-affected harmful factors
If the secondary seal is made more robust to resist contamination forces, then resistance to contamination is improved, but the seal geometry becomes more complex and friction increases
Solution Approach 1:
The invention changes the geometric parameters of the secondary seal by introducing specific profile shapes (triangular, quadrangular, labyrinth, or corrugated). These parameter changes create a profiled anti-contamination lip that provides enhanced contamination resistance through multiple sealing surfaces and force redirection, while maintaining manageable geometric complexity through well-defined standard profile types.
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 significantly increases the service life of the seal and downstream components by preventing contamination-induced force reduction and deformation, enhancing centering and holding torque, thus preventing seal failure and transmission wear.
Implementation Method 1
The proposed geometry directs the force of infiltrating contamination directly into the respective housing element so that there can be no impact on the seal itself
Implementation Method 2
The chambered profiling can be formed in the manner of a labyrinth, so that even contamination that penetrates the labyrinth tends to solidify so that it cannot be transported further in the direction of downstream components
Data Source
AI summary
The invention relates to a slide ring seal, and in particular a running gear seal, at least comprising an angled slide ring and/or counter ring, the radial leg of which forms a sliding region, and the axial leg of which forms a seating for a sealing element, which radially outside of the sliding region, is provided with a projection that at least partially overlaps the radial leg, forming a secondary seal, wherein at least in the region of the radial leg, the projection is provided with a profile, which is supported on the outer circumferential surface of the radial leg, forming anti-contamination lips in the installed state of the slide ring seal, and in particular running gear seal, that profile being supported on the outer circumferential surface of the radial leg when viewed in the axial direction.