Filter Element Sealing Edge Parallel to Axis
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Solution Overview
Problem
Existing filter devices face high production costs due to complex holding means designs, installation difficulties leading to sealing issues, and incompatibility with corrosive or biodegradable fluids, as well as limitations in using aftermarket components.
Innovation Solution
A filter device with a sealing edge or surface parallel to the longitudinal axis, integrated into the end cap, using a threaded connection for secure attachment and sealing, eliminating the need for radial O-rings and allowing for material selection suitable for various fluids, including corrosives, and preventing damage during installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring configuration holding means is used to push the end piece onto the housing-side holding element, then the filter element can be detachably fixed, but the production cost increases and the design becomes complex
Solution Approach 1:
The invention extracts the spring configuration from the holding means and relocates the sealing function to a separate radial sealing element. The holding means is simplified to a direct mechanical connection between the filter element end piece and housing holding element, eliminating the need for compression springs while maintaining detachable fixing capability.
Solution Approach 2:
The invention segments the sealing function from the holding function by introducing a separate radial sealing element that is distinct from the holding means. This allows the holding means to be simplified while the sealing function is maintained through the dedicated radial sealing element that contacts the fluid connecting branch.
2Reliability
If a radial O-ring sealing means is used to seal between the filter element and housing cover, then sealing is achieved, but the sealing action is adversely affected by installation difficulties such as slippage and tilting
Solution Approach 1:
The invention introduces a radial sealing element as an intermediary component that mediates between the filter element end piece and the housing cover. This sealing element is positioned radially and contacts the fluid connecting branch, providing a stable sealing surface that prevents slippage and tilting during installation while maintaining effective sealing.
3Reliability
If an O-ring sealing means is used, then sealing is provided, but the sealing function cannot be ensured for corrosive or biodegradable liquids due to material limitations
Solution Approach 1:
The invention changes the material parameter of the sealing element, transitioning from traditional rubber O-rings to a sealing element made from chemically resistant materials such as PTFE (Teflon) or other fluoropolymers. This material parameter change enables the sealing element to withstand corrosive and biodegradable liquids while maintaining the sealing function.
4Reliability
If a complex holding means with spring configuration is used, then the filter element can be securely held, but the production cost increases significantly
Solution Approach 1:
The invention extracts the expensive spring components from the holding means and replaces them with a simple direct mechanical connection. The holding element on the housing and the end piece on the filter element are designed to mate directly, eliminating the need for compression springs and reducing manufacturing complexity and cost.
Solution Approach 2:
The invention employs a simple, inexpensive holding mechanism that can be easily manufactured and replaced. The holding means uses basic mechanical features such as tapered sections and simple engagement surfaces that are much cheaper to produce than spring configurations, while maintaining adequate holding strength for the filter element.
Data Source
AI summary
A filtering apparatus includes a pot-type filter housing (10), a filter element (28) accommodated in the housing, a holding mechanism (38) disposed in the filter housing (10) to removably fix the filter element along its longitudinal axis, and a sealing device (60) that seals between a lid (20) of the filter housing (10) and the filter element (28). The holding mechanism (38) is provided with cooperating holding elements embodied on the interior face of the filter housing (10) as well as on the filter element (28). The filtering apparatus dispenses with the need for O-seals that are known in prior art and extend in a radial direction between the filter element and the filter head as a housing lid because the sealing device (60) encompasses at least one sealing edge (62) or sealing surface placed parallel to the longitudinal axis in a radial direction and seals under the effect of the pressure applied it by the holding mechanism (38). The invention further relates to a filter element that is to be used in such filtering apparatus.