Wheel Hub Seal With Elastic Barrier For Silt Blocking
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Solution Overview
Problem
Conventional wheel hub seals fail to effectively prevent silt intrusion and suffer from durability issues due to wear and tear, leading to oil leaks and reduced functionality over time.
Innovation Solution
A wheel hub seal design featuring an inner and outer annular member with a passage and elastic second barrier, where the flexible portion is resiliently pressed against a top portion by a press portion, creating a seal that blocks external silt and maintains reliability despite wear, utilizing a raised press portion on the outer surface to enhance sealing and reduce friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inner annular member and outer annular member are spaced apart to allow rotation, then the seal can achieve boundary lubrication effect, but external silt can intrude into the seal through the space
Solution Approach 1:
A resilient barrier is introduced as an intermediary element between the inner and outer annular members. This barrier performs dual functions: it maintains the necessary spacing for rotation while creating a protective interface that prevents silt intrusion. The barrier acts as a mediator that resolves the conflict between requiring a gap for lubrication and needing to block contaminants.
Solution Approach 2:
The resilient barrier is made of flexible material that can deform and adapt to the rotating motion while maintaining continuous contact with both annular members. This flexible structure effectively blocks silt particles from entering the space between the inner and outer annular members, solving the dust-proof problem while preserving the rotational lubrication function.
2Object-affected harmful factors
If a rubber block is provided in the space to prevent silt entry, then dust-proof capability is improved, but the rubber block suffers wear and tear and loses function over time
Solution Approach 1:
The resilient barrier is designed to dynamically adapt to the rotating motion between the inner and outer annular members. Unlike a static rubber block, the barrier can flex and move with the rotation, distributing wear more evenly and maintaining its sealing function over time. The dynamic nature of the barrier allows it to self-adjust and resist degradation from continuous friction.
3Reliability
If the resilient barrier is pressed against the inner annular member to prevent oil leaks, then sealing performance is improved, but friction and wear increase
Solution Approach 1:
The patent replaces pure mechanical friction-based sealing with a boundary lubrication system. The resilient barrier creates a film that separates the contacting surfaces, substituting direct metal-to-metal or rigid-to-rigid friction with lubrication-mediated contact. This reduces wear and extends service life while maintaining effective sealing performance.
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 design effectively blocks external silt and maintains sealing performance even with wear and tear, ensuring better durability and reliability of the wheel hub seal.
Implementation Method 1
the outer annular member drives the resilient barrier to rub against the inner annular member at a high speed to create a boundary lubrication effect, thereby achieving the purpose of preventing oil leaks
Implementation Method 2
The flexible portion is resiliently pressed against the inner annular member by the press portion
Data Source
AI summary
A wheel hub seal has an inner annular member. An outer side of the inner annular member is sleeved with an outer annular member. A passage is formed between the inner annular member and the outer annular member. An opening of the passage is provided with a second barrier. The second barrier has a fixed portion fixed to the outer annular member. The fixed portion extends toward the inner annular member to form a suspended flexible portion. An outer surface of the flexible portion is provided with a raised press portion. Thereby, when the wheel hub seal is mounted in a shaft hole of a hub, the press portion is compressed by the inner wall of the shaft hole to press the flexible portion to resiliently lean against the inner annular member to seal the passage, achieving the effect of blocking external silt.