Filter Pleat Pack Retention via Joining Member
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Solution Overview
Problem
V-cell mini-pleat filters in gas turbine air intake systems suffer from 'bowing' due to high pressure, leading to damage and reduced filtration performance, as well as a shortened service life.
Innovation Solution
A filter assembly design featuring a filter frame with end caps and spaced rails, where filter media pleat packs are secured with a joining member that provides stiffness, preventing excessive bowing and damage under high pressure loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high pressure is applied across the flat panel filtration media, then filtration performance is improved, but the media deflects and damages resulting in reduced service life
Solution Approach 1:
The filter media is divided into multiple pleat packs, each independently supported by the filter frame structure. This segmentation allows each pleat pack to be individually retained by the rails and end caps, distributing the structural support load and preventing excessive deflection of any single media section under high pressure conditions
Solution Approach 2:
The filter frame structure, including front and rear rails and end caps, acts as an intermediary support system between the high pressure load and the filtration media. This intermediate structure provides rigid support that prevents the media from deflecting excessively under pressure, thereby maintaining both filtration performance and extending service life
2Strength
If the filter media is made more rigid to prevent bowing, then damage is reduced, but filtration efficiency may be compromised
Solution Approach 1:
The media is segmented into pleat packs that are structurally supported at multiple points by the filter frame. This allows the use of flexible filtration media that maintains high filtration efficiency while the segmented structure with external support prevents excessive bowing and damage under pressure
Solution Approach 2:
The filter frame provides localized structural support at specific positions (front and rear rails, end caps) where the media is most vulnerable to deflection. This allows the media to maintain its flexible, efficient filtration properties in the bulk areas while having reinforced support only where structurally necessary
Data Source
AI summary
An approach that provides filter media pleat pack retention is described. In one embodiment, filter media pleat pack retention is attained by providing a filter media pleat pack having a joining member located between a first filter media portion and a second filter media portion. The first filter media portion is coupled to the joining member at one side and the second filter media portion is coupled to the joining member at an opposite side. The joining member provides stiffness to the filter media pleat pack and provides support to the panel stopping excessive bowing under high pressure and subsequent tearing and puncture.