Oil Strainer Bridge Seal Prevents Leakage
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Solution Overview
Problem
Oil strainers face challenges in maintaining effective filtration performance due to oil leakage between upstream and downstream spaces, which can occur when the filter is not properly fitted within the casing, leading to clearance formation and contamination of the oil outlet.
Innovation Solution
The introduction of a sealing portion with a bridge shape that separates the upstream and downstream spaces within the casing, ensuring a wider seal area and reducing the likelihood of oil leakage, while also providing support to maintain the filter's position and prevent deformation over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filter is housed in the upper member with support from a projection in the lower member, then the filter is supported and positioned, but a clearance is likely to form between the other member and the periphery of the filter, causing unfiltered oil to leak
Solution Approach 1:
The sealing portion is divided into a bridge-shaped structure that spans across the oil channel, separating the upstream and downstream spaces. This segmentation allows the sealing function to be independent from the filter support structure, eliminating clearance issues while maintaining structural simplicity.
Solution Approach 2:
The bridge-shaped sealing portion acts as an intermediary element between the upstream and downstream spaces. It provides a dedicated sealing function that prevents unfiltered oil from leaking, while the filter itself is supported separately by projections in the lower member.
2Productivity
If the sealing portion is separated from the inner wall surface of the casing, then oil distribution is improved, but sealing effectiveness may be reduced
Solution Approach 1:
The sealing portion transitions from a wall-mounted structure to a bridge-shaped structure extending across the oil channel. This dimensional change allows the sealing surface to be positioned in the middle of the flow path rather than against the wall, improving oil distribution while maintaining sealing effectiveness through the bridge geometry.
Data Source
AI summary
A casing (20) housing a filter (10) includes a sealing portion (43) for sealing a gap between an upstream space (R1) and a downstream space (R2). The sealing portion (43) has a bridge shape separated from a wall surface of the oil channel and extending across the channel.