Filter Element Drainage Seal Structure for Easy Replacement
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Solution Overview
Problem
Existing filters for internal combustion engines face challenges in easily replacing the seal of the filter element sealing device, which affects the sealing efficiency and maintenance convenience.
Innovation Solution
The filter element sealing device incorporates a seal that is circumferentially connected to the filter element, allowing for easy replacement and enhanced positional tolerance, with options for radial and axial sealing, and a positioning element that serves both as a seal and a retaining component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter element is tightly fitted into the filter housing, then sealing performance is improved, but the risk of damaging the filter housing discharge opening increases
Solution Approach 1:
The filter element features a reinforced discharge closure element at its discharge end, creating a localized strengthening exactly where the filter element contacts the filter housing discharge opening. This localized reinforcement improves sealing performance at the critical interface without requiring the entire filter element to be excessively robust, thereby preventing damage to the filter housing discharge opening during installation and use.
Solution Approach 2:
The discharge closure element is formed from a material that is different from the main filter element material, specifically a material with higher mechanical strength and stiffness. This composite construction allows the filter element to maintain good sealing properties while the stronger discharge closure element prevents damage to the filter housing discharge opening, resolving the contradiction between sealing performance and structural strength.
2Strength
If a discharge closure element is added to reinforce the filter element, then mechanical strength is improved, but device complexity increases
Solution Approach 1:
The discharge closure element is integrated directly into the filter element structure, forming a unified component rather than a separate attachment. The discharge closure element and filter element are formed in a single manufacturing process as one piece, which simplifies assembly and reduces the number of separate parts, thereby minimizing the increase in device complexity while still providing the necessary mechanical strength reinforcement.
Solution Approach 2:
The discharge closure element serves multiple functions: it reinforces the filter element to prevent damage during installation and use, provides sealing contact with the filter housing discharge opening, and maintains structural integrity during backflushing operations. By combining multiple functions into a single element, the overall device complexity is minimized while achieving the desired strength improvement.
Data Source
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AI summary
The invention relates to a filter element (18) of a filter (10) for fluid, in particular oil or fuel, in particular of an internal combustion engine, in particular of a motor vehicle, a discharge closure element (26) and a filter (10). The filter element (18) comprises at least one filter medium (22), which continuously surrounds an element interior (24) peripherally relative to an imaginary axis (20) and which on at least one axial end face relative to the axis (20) is connected to an end body (28). The end body (28) has a filter element drainage opening (30) which surrounds the axis (20) and is connected to the element interior (24), and at least one filter element sealing surface or filter element seal surface (38, 40, 68) of a filter element sealing device (69), which continuously surrounds the filter element drainage opening (30) peripherally and by means of which the filter element drainage opening (30) can be closed when the filter (10) is assembled. The filter element sealing device (69) has at least one peripherally continuous seal (36) relative to the axis (20), which seal is secured to the filter element (18).