Wheel Hub Sealing Ring With Pressure-Relief Sealing Lips
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Solution Overview
Problem
Existing hub cap systems fail to effectively seal against foreign bodies and moisture while allowing pressure compensation in wheel hubs equipped with tire pressure regulation systems, leading to potential damage from excess pressure buildup.
Innovation Solution
A sealing ring with a retaining region, primary and secondary sealing lips, and a design that allows for pressure compensation through the secondary sealing lip's elastic bending when excess pressure is detected, while the primary lip provides continuous sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing ring is provided to seal the wheel hub interior against foreign bodies and moisture, then the sealing effect is improved, but excess pressure buildup occurs when compressed air leaks into the sealed space
Solution Approach 1:
The sealing ring incorporates an elastic secondary sealing lip that can flexibly deform under pressure. When excess pressure builds up in the wheel hub interior, the secondary sealing lip elastically bends away from its sealing position, automatically creating a pressure relief path without compromising the overall sealing structure.
Solution Approach 2:
The sealing ring transitions from a static sealing component to a dynamic pressure-regulating component. The secondary sealing lip is designed to remain in contact with the hub cap under normal conditions for sealing, but automatically moves away when pressure exceeds a threshold, providing dynamic pressure compensation.
2Object-affected harmful factors
If the wheel hub interior is completely sealed to protect against foreign bodies, then protection against dirt and moisture is improved, but pressure compensation becomes difficult
Solution Approach 1:
The sealing ring performs multiple functions simultaneously: the primary sealing lip provides continuous sealing against foreign bodies, while the elastic secondary sealing lip provides pressure compensation. This multi-functional design eliminates the need for separate pressure relief valves or complex mechanisms.
Solution Approach 2:
The sealing ring is self-regulating through the elastic properties of the secondary sealing lip. When pressure builds up, the lip automatically deforms to create a relief path, and when pressure normalizes, it returns to its sealing position, providing automatic pressure compensation without external control systems.
3Stress or pressure
If a complex pressure relief valve is added to allow pressure compensation, then excess pressure damage is prevented, but the device complexity and assembly difficulty increase
Solution Approach 1:
The pressure compensation function is merged into the sealing ring itself rather than being a separate component. The secondary sealing lip is integrated into the same ring structure that provides sealing, combining two functions into one component and simplifying both the device and assembly.
Solution Approach 2:
The sealing ring serves as both the primary sealing element and the pressure relief mechanism through its elastic secondary sealing lip, eliminating the need for separate pressure relief valves, sensors, or control systems.
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 sealing ring effectively prevents the ingress of dirt and moisture while allowing pressure equalization, ensuring the integrity of the wheel hub system by preventing damage from excess pressure.
Implementation Method 1
the secondary sealing lip can be designed to allow pressure to be released by flexing back in the event of excess pressure in the interior above the predetermined threshold pressure
Implementation Method 2
The primary sealing lip and/or the secondary sealing lip can be configured to prevent the penetration of foreign bodies, in particular dirt and/or water, into an interior
Data Source
AI summary
A sealing ring includes a retaining region, a primary sealing lip and a secondary sealing lip, wherein the retaining region is formed circumferentially about an axial direction, wherein a radial direction extends radially and perpendicularly away from the axial direction, and wherein the primary sealing lip and the secondary sealing lip have an extension in the radial direction, in particular in the positive radial direction.