Filter Unit Sealing Mechanism for Hermetic Assembly
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Solution Overview
Problem
Compact air filter elements require a hermetic seal around their outer circumference to function properly, but existing designs are prone to operator errors during assembly, leading to incomplete sealing and potential unfiltered air leakage.
Innovation Solution
The filter unit incorporates a link guide mechanism with an insertion ramp and spacer elements to ensure precise positioning and sealing, using a combination of groove-shaped guides and pins for axial movement, and a clamping system that prevents incomplete installation by requiring correct alignment and sealing collar engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lever mechanism is used to move the filter protection element axially for sealing, then the sealing can be achieved, but operator errors occur when the lever is not turned, leading to incomplete sealing
Solution Approach 1:
The filter protection element is pre-configured with a projection that automatically engages with the insertion ramp during insertion. This preliminary arrangement ensures that the axial movement for sealing is triggered automatically by the insertion action itself, eliminating the need for a separate lever operation and preventing operator errors.
Solution Approach 2:
The insertion process itself performs the sealing function through the self-service mechanism. As the filter protection element is inserted, its projection automatically slides along the insertion ramp, causing the element to move axially and press the sealing ring against the sealing flange. The system serves itself by making the sealing action an inherent part of the insertion process.
2Device complexity
If manual lever operation is required for sealing, then the mechanism is simple, but operator errors lead to unfiltered air leakage
Solution Approach 1:
The filter protection element is pre-configured with a projection that automatically engages with the insertion ramp during insertion. This preliminary arrangement ensures that the axial movement for sealing is triggered automatically by the insertion action itself, eliminating the need for a separate lever operation and preventing operator errors.
Solution Approach 2:
The insertion process itself performs the sealing function through the self-service mechanism. As the filter protection element is inserted, its projection automatically slides along the insertion ramp, causing the element to move axially and press the sealing ring against the sealing flange. The system serves itself by making the sealing action an inherent part of the insertion process.
3Ease of operation
If the filter element insertion is not precisely controlled, then assembly is easier, but sealing precision is compromised
Solution Approach 1:
The insertion ramp acts as an intermediary mechanism that translates the simple insertion motion into precise axial positioning. The ramp's inclined surface guides the projection of the filter protection element, ensuring that the element moves to the exact sealing position automatically, combining ease of operation with precision.
Solution Approach 2:
The insertion ramp converts motion from one dimension (horizontal insertion) to another dimension (axial movement for sealing). This dimensional transformation allows the operator to perform a simple insertion action while achieving precise positioning in the axial direction, where sealing accuracy is critical.
Data Source
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AI summary
The invention relates to a filter unit which comprises at least one housing and at least one filter element the front faces of which allow a liquid to axially flow through. Said filter unit is inserted across at least part of its length into a tubular filter protection element (10) and is connected thereto and has, on its outer periphery, at least one continuous sealing collar which is supported on the filter protection element and can be forced against a sealing flange on the housing by means of tensioning elements. Said tensioning elements are constituted by at least one insertion ramp (25) on the housing and at least one projection (15) on the filter protection element (10), which projection slides down the insertion ramp. The insertion ramp (25) extends from a point of insertion (25.5) in the interior of the housing in a direction at an angle to the direction of flow towards the housing (23) and in an axial direction towards the sealing flange on the housing (23).