Filter Element Upper End Cap Intermediate Wall Adhesive Control
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Solution Overview
Problem
Existing filter elements for pneumatic systems face issues with liquid redispersion due to uneven adhesive distribution at the upper end cap, leading to liquid mixing with compressed air.
Innovation Solution
A filter element design featuring an upper end cap with an intermediate wall that restricts adhesive flow, ensuring uniform adhesive distribution and preventing recess formation, thus preventing liquid redispersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive is applied to bond the upper end cap to the filter assembly, then the upper end cap is securely fixed, but uneven adhesive distribution causes recess formation that leads to liquid redispersion
Solution Approach 1:
The upper end cap is divided into multiple functional regions: an inner peripheral wall region, an intermediate wall region, and an outer peripheral wall region. This segmentation allows different areas to serve different purposes - the intermediate wall acts as a barrier to control adhesive flow and prevent recess formation, while still allowing secure bonding in other regions.
Solution Approach 2:
The intermediate wall serves as an intermediary structure between the inner and outer peripheral walls. It mediates the adhesive distribution by physically blocking excessive adhesive flow, thereby preventing the formation of recesses that would cause liquid redispersion, while still allowing the bonding function to be achieved.
2Productivity
If compressed air flows at high velocity through the filter, then filtration efficiency is improved, but liquid particles are dispersed back into the purified air
Solution Approach 1:
The intermediate wall is constructed in advance to prevent recess formation before compressed air flows through the filter. By pre-preventing the formation of liquid accumulation zones, the design eliminates the source of liquid redispersion problems that would occur during high-velocity operation.
Solution Approach 2:
The intermediate wall, which might seem to add complexity to the end cap structure, actually benefits the system by preventing a harmful effect (liquid redispersion). The structure converts what would be a potential problem area (adhesive application zone) into a beneficial feature that prevents liquid from re-entering the compressed air stream.
3Ease of manufacture
If the upper end cap structure is simplified, then manufacturing is easier, but adhesive distribution becomes uneven causing liquid accumulation
Solution Approach 1:
The upper end cap is designed with local quality variations - the intermediate wall is strategically placed only where needed to control adhesive flow and prevent recess formation. This localized structural feature maintains manufacturing simplicity while ensuring reliable liquid separation by preventing adhesive distribution problems in the critical bonding zone.
Data Source
AI summary
An upper end cap is attached to an upper end portion of a filter assembly, and the upper end cap includes an inner peripheral wall that is fitted into a central space portion of an inner-filter member, an intermediate wall that surrounds the outer periphery of an outer-core member, and an outer peripheral wall that surrounds the outer periphery of an outer-filter member. The height of the intermediate wall is smaller than the height of the outer peripheral wall and the height of the inner peripheral wall. The inside of the upper end cap is filled with adhesive having a depth that enables the intermediate wall to be embedded in the adhesive, and the upper end portion of the filter assembly is bonded to the upper end cap in a state where the upper end portion is inserted in the adhesive.