Filter Element Compensation Device for Misalignment
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Solution Overview
Problem
Filter devices with form-fit connections between housing and filter elements face misalignment issues due to manufacturing tolerances, leading to malfunctions and potential damage, especially in devices with elongated filter elements, where small angular errors result in significant misalignments.
Innovation Solution
A compensation device with two shell parts, one stationary and one movable, integrated into the filter element, allows for misalignment compensation, increasing tolerance limits and enabling reliable operation while reducing production costs. The movable shell part forms a spherical ring, providing a reliable seal and fluid flow guidance, and an annular sealing device ensures secure sealing against the filter head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If form-fit connections are used between housing and filter element, then secure mounting is achieved, but manufacturing tolerances cause misalignment leading to malfunctions and damage
Solution Approach 1:
The connection system is divided into two functional segments: a form-fit connection component providing precise positioning and a separate retaining element providing secure retention. This segmentation allows each component to optimize its function independently, with the form-fit part ensuring accurate alignment and the retaining part ensuring secure mounting, thereby resolving the contradiction between reliability and manufacturing precision requirements.
2Manufacturing precision
If tight tolerances are maintained in manufacture, then alignment accuracy is improved, but production costs increase
Solution Approach 1:
By segmenting the connection system into positioning and retention functions, the patent allows less precise manufacturing of the retaining elements while maintaining high alignment accuracy through the dedicated form-fit connection component. This reduces overall manufacturing tolerances requirements and lowers production costs while preserving alignment accuracy.
Solution Approach 2:
The form-fit connection acts as an intermediary element between the housing and filter element, absorbing the alignment tolerance issues. This mediator component is designed to accommodate manufacturing variations and ensure precise alignment without requiring tight tolerances across all parts, thereby reducing production costs while maintaining alignment accuracy.
3Productivity
If elongated filter elements are used, then filtration performance is improved, but misalignment errors are amplified causing malfunctions
Solution Approach 1:
The connection system is segmented into a form-fit connection component that provides precise positioning along the longitudinal axis and a retaining element that secures the filter element in place. This segmentation ensures that even elongated filter elements maintain accurate alignment throughout their length, preventing amplification of misalignment errors while preserving filtration performance.
Solution Approach 2:
The patent introduces a dimensional aspect to the connection system by using a form-fit connection that engages along the longitudinal axis of the filter element. This longitudinal engagement dimension distributes alignment forces along the length of the element, preventing localized misalignment errors from amplifying and causing malfunctions in elongated filter elements.
Data Source
AI summary
A filter device and a filter element (14) having a filter head (10) and having a filter bowl (12) for mounting the replaceable filter element (14), characterized in that a compensation device (16) is provided, which acts between the filter head (10) and the filter element (14) and which, as a component of the filter element (14), has two shell parts (18, 20), one shell part (18) of which is secured stationarily to the filter element (14) and the other shell part (20) of which, in contrast, is designed to be movably guided, and in that one of the two shell parts (20) has a passage opening (22) for guiding a fluid flow.