Multi-Hole Seal Structure for Low Pre-Pressure Fluid Sealing
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Solution Overview
Problem
Existing sealing components face challenges in maintaining good sealing performance under relatively small pre-pressure when the sealing area is large, particularly in complex mounting scenarios.
Innovation Solution
The proposed seal design includes body portions with first through holes and corresponding first sealing portions, which feature first and second extension portions that extend from the body toward the through holes, creating a closed protruding structure around each hole. This design allows for effective sealing with reduced pre-pressure requirements, even on large sealing areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the sealing area is increased to cover large surfaces, then the sealing coverage is improved, but the pre-pressure requirement increases making sealing difficult
Solution Approach 1:
The seal is divided into multiple independent sealing units, each with its own through hole and sealing portions. The seal body includes first through holes and second through holes that are sealed by corresponding first sealing portions and second sealing portions respectively. This segmentation allows each sealing unit to independently deform and seal under reduced pre-pressure while collectively covering a large sealing area.
Solution Approach 2:
The sealing portions are designed with different structural characteristics from the seal body. The first sealing portions and second sealing portions have extension portions that extend toward the through holes, creating localized compliance zones. These local quality differences enable the sealing portions to deform more easily under pre-pressure while the main seal body maintains structural integrity, solving the contradiction between large sealing area and high pre-pressure requirements.
2Ease of manufacture
If the seal structure is simplified for easy manufacturing, then the manufacturing complexity is reduced, but the sealing performance under small pre-pressure deteriorates
Solution Approach 1:
The sealing portions are designed to be dynamically deformable under pre-pressure. The extension portions of the first and second sealing portions can elastically deform toward the through holes when pre-pressure is applied, ensuring reliable sealing contact. This dynamic behavior is built into the structure itself, allowing the seal to adapt to mounting variations and maintain sealing performance without complex active control mechanisms.
Solution Approach 2:
The seal structure utilizes parameter changes in the sealing portions, specifically the extension portions that extend toward the through holes. These extension portions have different dimensional parameters compared to the main seal body, allowing them to deform more easily under pre-pressure. This parameter differentiation enables reliable sealing performance under small pre-pressure while maintaining a relatively simple overall structure that can be manufactured using conventional techniques.
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 seal achieves good sealing performance under relatively small pre-pressure, effectively addressing the challenge of large sealing areas by allowing the extension portions to deform more easily than the body portion, thereby maintaining uniform compression and reducing the risk of leakage.
Implementation Method 1
allowing the extension portions to deform more easily than the body portion, thereby maintaining uniform compression
Data Source
AI summary
A seal, a fluid assembly comprising same, and a fluid device. The seal comprises a body portion; first through holes are formed in the seal; the seal further has first sealing portions corresponding to the first through holes; there are at least two first through holes; each first sealing portion comprises a first extension portion and a second extension portion; the first extension portion and the second extension portion are located on opposite sides of the body portion; the first extension portion and the second extension portion extend from the body portion toward the first through holes; the distance between the first extension portion and the second extension portion is greater than the height of the body portion; and the first extension portion is a closed raised structure, and the second extension portion is also a closed raised structure.