Filter Device Sealing via Concentric Collar Guidance
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Solution Overview
Problem
Existing filter devices face reliability issues due to critical transmission of spring force, deformation risks, and uneven force transmission, leading to impaired sealing, especially with diagonal pull rods and multiple energy stores.
Innovation Solution
A filter device design where the collar part of the fixing device is guided concentrically within the collar part of the support part, allowing optimal axial force transmission, eliminating the need for a second energy store and enhancing sealing by using a single energy store to act on both end caps, with a stepped collar part and snap-in latches for secure engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pull rod extends completely through the filter element with a first energy accumulator on its free end, then the support part is pulled against the collar part of the fixing device, but the transmission of spring force is critical and deformation risk increases with increased sealing force
Solution Approach 1:
The invention extracts the problematic pull rod that extended through the filter element and removes the first energy accumulator from the moving side. Instead, the energy store is positioned on the stationary housing side, eliminating the deformation risk associated with force transmission through the filter element while maintaining sealing effectiveness.
Solution Approach 2:
The invention introduces a collar part on the support that acts as an intermediary element. This collar part receives the sealing force directly from the energy store via the fixing device's collar part, providing a stable force transmission path that avoids deformation of the filter element while ensuring reliable sealing between the support and housing.
2Reliability
If a pull rod is used to transmit sealing force, then the support part is pulled against the collar part, but the sealing of the passage point of the pull rod is difficult
Solution Approach 1:
The invention completely removes the pull rod from the system. The sealing force is transmitted directly through the collar parts without requiring a pull rod to pass through the filter element, thereby eliminating the complex sealing requirements at the pull rod passage point.
3Force
If a long pull rod is used for pulling the support part, then the support part can be pulled against the collar part, but due to diagonal pull there is a risk of the entire support part tilting with correspondingly uneven transmission of force
Solution Approach 1:
The invention removes the long pull rod that caused diagonal pulling and potential tilting. The sealing force is applied directly to the collar part through the fixing device, ensuring axial force transmission without diagonal components that could cause the support part to tilt or rotate.
Solution Approach 2:
The invention positions the energy store on the stationary housing side rather than on the moving support side. This creates a balanced force application point that ensures even distribution of sealing force across the sealing interface, preventing tilting or uneven force transmission to the collar part.
4Reliability
If multiple energy stores are used to fix the collar part and provide sealing force, then the sealing can be maintained, but the device complexity increases
Solution Approach 1:
The invention combines the functions of multiple energy stores into a single energy store positioned on the housing side. This single energy store simultaneously provides both the sealing force against the filter element and the fixing force for the collar part, eliminating the need for a second energy store and reducing overall device complexity.
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
This design ensures improved sealing and operating behavior by maintaining a consistent sealing force and secure assembly, reducing the risk of deformation and uneven force transmission, while allowing for easy disengagement and maintenance.
Implementation Method 1
with at least one energy store (61) arranged on the fixing device (53) so that in the filtering operating state of the device the action of the energy store (61) exerts a force on the sealing device (17, 15)
Data Source
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AI summary
A filter device, having a support part (39, 43) and a filter part (1) that can be received therein, having at least one sealing device (17) that acts between the support part (39, 43) and the filter part (1), and having a securing device (53, 57, 61) for releasably connecting the support part (43) to the filter part (1), which securing device has a circumferential collar part (53) and, under the action of at least one energy store (61), exerts a force on the sealing device (17), which force seals the support part (39, 43) and the filter part (1) in a fluid-tight manner with respect to one another, wherein the support part (39, 43) has, at least on its end region oriented toward the securing device (53, 57, 61), another circumferential collar part (39), is characterized in that the collar part (53) of the securing device (53, 57, 61) is guided concentrically within the collar part (39) of the support part (39, 43) which is provided with a sealing system (41, 72).