Filter Element Compensating Device for Misalignment
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Solution Overview
Problem
Filter devices with positive connections between element receptacles and housing parts require tight tolerances, leading to misalignment issues, especially with elongated filter elements, resulting in malfunctions or damage, and existing solutions are complex and costly.
Innovation Solution
A filter device with a compensating device featuring two shell parts, one stationary and one movable, with a through opening for fluid flow, allowing for misalignment compensation, reducing production tolerance requirements and enabling reliable operation with lower manufacturing costs, while maintaining a secure seal and space efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If tight tolerances are maintained during manufacture of filter housing and components, then alignment precision between element receptacles and retaining elements is improved, but manufacturing cost and complexity increase
Solution Approach 1:
The filter element is designed with a dynamic bearing structure that allows it to pivot and adjust its position relative to the housing. The bearing surface on the filter element can rotate and move within the receptacle, enabling the system to adapt to misalignments during assembly rather than requiring precise pre-alignment through tight manufacturing tolerances.
Solution Approach 2:
The bearing structure changes the geometric parameters of the connection between the filter element and housing. By introducing a spherical or conical bearing surface, the system transforms rigid alignment requirements into a more flexible geometric relationship that can accommodate tolerance variations while maintaining functional alignment through the bearing's pivot capability.
2Manufacturing precision
If tight tolerances are maintained during manufacture, then alignment precision is improved, but device complexity increases due to additional sealing requirements
Solution Approach 1:
The dynamic bearing structure eliminates the need for complex static sealing arrangements by allowing the filter element to self-adjust its position. The sealing function is simplified to a single seal element that works with the bearing's movement, reducing the number of sealing components needed compared to rigid alignment systems.
Solution Approach 2:
The bearing structure enables the filter element to self-align and self-adjust its position within the housing receptacle. This self-service capability eliminates the need for complex external sealing structures that would be required to compensate for misalignments in rigid systems, as the bearing itself absorbs the alignment errors.
3Adaptability or versatility
If a bearing structure with multiple degrees of freedom is introduced, then misalignment compensation is improved, but device complexity and component quantity increase
Solution Approach 1:
A single bearing structure with one or two degrees of freedom is introduced to provide misalignment compensation. The bearing allows the filter element to pivot and adjust its orientation, absorbing misalignments between the filter element axis and the housing receptacle axis without requiring complex multi-component mechanisms.
Solution Approach 2:
The bearing structure serves multiple functions simultaneously: it provides misalignment compensation, maintains sealing between the filter element and housing, and enables easy assembly and disassembly. This multi-functionality reduces the need for separate components for each function, thereby reducing overall device complexity.
Data Source
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AI summary
1. Filter device and filter element 2. Filter device and filter element (14) with a filter head (10) and with a filter pot (12) for receiving the replaceable filter element (14), characterized in that a compensating device (16) acting between the filter head (10) and the filter element (14) is provided, which as a component of the filter element (14) has two shell parts (18, 20), one of which shell part (18) is fixed stationary on the filter element (14) and the other shell part (20) is guided movably in relation to it, and that one of the two shell parts (20) has a through-opening (22) for guiding a fluid flow.