Modular Reciprocating Shaft Sealing with Intermediate Rigid Ring Support
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Solution Overview
Problem
Sealing devices for shock absorbers face challenges in maintaining high pressure resistance and durability, especially in harsh vehicle driving environments and high internal oil pressure conditions.
Innovation Solution
A sealing device comprising separate oil and dust seal members with rigid and elastic rings, reinforced by an intermediate rigid ring, enhancing pressure resistance and durability through strong supporting forces and easy replacement or customization of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single integrated sealing structure is used, then the device complexity is reduced, but the pressure resistance and durability are insufficient under high internal oil pressure conditions
Solution Approach 1:
The sealing device is divided into separate oil seal member and dust seal member, each with independent rigid rings and elastic rings. This segmentation allows each component to be optimized for its specific function, with the oil seal member handling high pressure oil sealing and the dust seal member handling external contamination, thereby improving overall pressure resistance and durability while maintaining manageable complexity through modular design
Solution Approach 2:
The sealing device combines rigid rings (made of rigid body material) with elastic rings (made of elastic body material) to create a composite structure. The rigid rings provide structural strength and pressure resistance, while the elastic rings provide sealing flexibility and adaptability to shaft variations. This composite approach enables the sealing device to withstand high internal oil pressure while maintaining effective sealing contact
2Reliability
If multiple separate sealing components are used to enhance pressure resistance, then the reliability improves, but the device complexity increases
Solution Approach 1:
The sealing device is divided into separate oil seal member and dust seal member, each with independent rigid rings and elastic rings. This segmentation allows each component to be optimized for its specific function, with the oil seal member handling high pressure oil sealing and the dust seal member handling external contamination, thereby improving overall pressure resistance and durability while maintaining manageable complexity through modular design
Solution Approach 2:
Each sealing member combines rigid rings and elastic rings into an integrated assembly that functions as a unified unit. The rigid ring and elastic ring are positioned concentrically with the reciprocating shaft, creating a compact structure that provides both structural support and sealing function without requiring excessive space or complex arrangements
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 enhances the pressure resistance and durability of the sealing device, allowing for easy maintenance and customization, effectively addressing the challenges of harsh environments and high pressure conditions.
Implementation Method 1
a liquid-side elastic ring made of an elastic body and attached to the liquid-side rigid ring, the liquid-side elastic ring having formed thereon an oil lip which is provided radially inward of the liquid-side rigid ring and slidably makes sealing contact with the reciprocating shaft; a dust seal member comprising an atmosphere-side rigid ring made of a rigid body and provided inside the shaft hole, and an atmosphere-side elastic ring made of an elastic body and fixed to the atmosphere-side rigid ring, the atmosphere-side elastic ring having formed thereon a dust lip which is provided radially inward of the atmosphere-side rigid ring and slidably contacts the reciprocating shaft
Data Source
AI summary
[Problem] To provide a sealing device having high pressure-resistance and durability for a reciprocating shaft.[Solution] A sealing device comprising an oil seal member and a dust seal member. The oil seal member and the dust seal member each comprise a rigid ring provided inside a shaft hole and an elastic ring attached to the rigid ring, wherein the elastic ring has formed thereon a lip for slidably contacting a reciprocating shaft. The sealing device further comprises an intermediate rigid ring provided between the elastic ring of the oil seal member and the elastic ring of the dust seal member, in a direction parallel to the axial direction of the reciprocating shaft.