Spiral Membrane End Member Structure for Stronger Exterior Bonding
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Solution Overview
Problem
The adhesion between the end member and the exterior material in spiral membrane elements is inadequate, leading to potential cracking and tearing when the element is detached from a pressure-proof container.
Innovation Solution
The end member features a body portion with a circular outline and an annular skirt portion, including a first protrusion that extends toward the element body, with cut-in portions, holes, or recesses to enhance adhesion, such as cut-in portions in the edge, holes or through holes in the outer surface, and tilted recesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple end member with skirt portion is used, then the device complexity is reduced, but the adhesion strength between end member and exterior material deteriorates
Solution Approach 1:
The end member is divided into multiple functional portions: a body portion for structural support and a skirt portion for adhesion. The skirt portion further includes protrusions and recesses that create multiple contact points with the exterior material, effectively segmenting the adhesion interface to increase overall bonding strength without complicating the overall device structure.
Solution Approach 2:
The end member features localized structural variations including protrusions and recesses specifically positioned at the skirt portion where adhesion is needed. These local features concentrate bonding strength at critical interfaces while maintaining simplicity in other areas, resolving the contradiction between overall structural simplicity and local adhesion requirements.
2Ease of operation
If the spiral membrane element is made detachable from pressure-proof container, then the ease of operation is improved, but the reliability of connection deteriorates
Solution Approach 1:
The end member is pre-configured with protrusions and recesses during manufacturing that create inherent mechanical interlocking with the exterior material. This preliminary structural preparation ensures that when the element is detached from the pressure-proof container, the connection reliability is maintained through these pre-formed bonding features, allowing easy detachment without compromising connection strength.
Data Source
AI summary
A spiral membrane element includes an element body, an end member, and an exterior material. The end member includes a body portion having a first protrusion, and a skirt portion located between the element body and the exterior material, and satisfies at least one selected from the group consisting of the following requirements (1) to (3): (1) the first protrusion has a cut-in portion and a part of the exterior material is placed into at least a part of the cut-in portion; (2) the skirt portion has at least one of a hole and a through hole, and a part of the exterior material is placed into at least a part of at least one of a hole and a through hole; and (3) the first protrusion has a recess, and a part of the exterior material is placed into at least a part of the recess.