Gas Turbine Filter Unit With Stretchable Bag
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Solution Overview
Problem
Existing air filter systems for gas turbines face challenges in convenient filter replacement during operation, leading to potential particle intrusion and costly maintenance, and existing solutions are cumbersome or prone to vibration damage.
Innovation Solution
A filter unit with a frame and support structure that stretches the filter bag into a parallelepiped shape, allowing for easy insertion and removal of filter pockets while maintaining filtration efficiency, and is foldable for storage and transportation, eliminating the need for auxiliary reinforcing elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the filter is removed from an intake device during gas turbine operation, then the filter replacement can be made, but particle intrusion into the gas turbine occurs leading to deteriorated operation and costly maintenance
Solution Approach 1:
The filter system is divided into multiple filter pockets that can be individually accessed and replaced. The intake device includes a movable cover that segments the access path, allowing filter maintenance without complete disassembly or shutdown of the gas turbine system.
Solution Approach 2:
The movable cover is designed to be opened beforehand to provide access to the filter pockets. This preliminary action of opening the cover allows filter replacement to be performed quickly without delaying the gas turbine operation or risking particle intrusion during the replacement process.
2Reliability
If the gas turbine is switched off for filter replacement, then particle intrusion is avoided, but ruptures in operation occur and economic loss is incurred
Solution Approach 1:
The cover is designed as a movable component that can be dynamically opened and closed during operation. This dynamic access mechanism allows the filter system to transition between operational states without shutting down the gas turbine, maintaining productivity while enabling maintenance access.
Solution Approach 2:
The gas turbine continues to operate continuously while the cover is opened for filter replacement. The design enables the useful action of particle filtration to continue uninterrupted, with only the cover moving to allow access, thus avoiding operational ruptures and economic losses.
3Stability of the object's composition
If auxiliary reinforcing elements are added to prevent sideway flexing, then filter stability is improved, but device complexity and cost increase
Solution Approach 1:
The reinforcing function is merged with the existing cover structure. The cover itself is designed to provide lateral support and prevent sideway flexing of the filter pockets, eliminating the need for separate auxiliary reinforcing elements. This integration maintains stability while reducing complexity.
Solution Approach 2:
The cover serves multiple functions: it provides access to the filter pockets, structurally supports the filter assembly to prevent lateral flexing, and protects the internal components. This multi-functionality eliminates the need for dedicated reinforcing elements, reducing device complexity while maintaining stability.
Data Source
AI summary
A filter unit comprising a filter bag for removing particles from an air or gas flow, wherein the filter unit is arranged to receive at least one filter pocket and the filter bag comprises an opening portion and an end portion opposite said opening portion. The filter unit further comprises a frame arranged at a periphery of the opening portion, and a support structure arranged at the periphery of the end portion for stretching an area of the end portion. The frame and the support structure act to stretch the filter bag into a substantially parallelepiped shape such that the filter unit is arranged to provide a free passage for the at least one filter pocket into and out of said filter bag. Furthermore, the filter unit is arranged to fold between the frame and the support structure into a folded state.