Filter Assembly Sedimentation Pocket for Gas Turbine Oil Filtration
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Solution Overview
Problem
Existing oil filtration systems for gas turbine engines struggle to effectively remove contaminants, such as carbon particles and metal particles, which can lead to Foreign Objects Damage (FOD) and reduce the lifespan of filter cartridges.
Innovation Solution
A filter assembly with a sedimentation pocket integrated into the inlet conduit, allowing particles to settle by gravity before reaching the filter cartridge, combined with a bypass system to prevent pressure buildup and extend filter cartridge lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional filtration system is used, then the filter cartridge removes contaminants from oil, but the filter cartridge becomes clogged quickly and requires frequent replacement
Solution Approach 1:
The filtration system is segmented into two distinct stages: a sedimentation pocket for preliminary particle separation and a filter cartridge for fine filtration. This segmentation allows the filter cartridge to handle only the finest contaminants rather than being overwhelmed by all particles, thereby extending its lifespan while maintaining effective contaminant removal.
Solution Approach 2:
The sedimentation pocket performs preliminary action by allowing larger and heavier particles to settle out of the oil flow before the oil reaches the filter cartridge. This pre-filtration step reduces the load on the filter cartridge, enabling it to operate longer before becoming clogged.
2Reliability
If the filter cartridge is designed to capture all particles, then contaminant removal is maximized, but pressure buildup occurs and oil flow is restricted
Solution Approach 1:
The system segments the filtration function, with the sedimentation pocket handling the bulk of particle removal through gravity settling. This reduces the pressure differential across the filter cartridge, as it only needs to filter the remaining finer particles rather than capturing all contaminants.
Solution Approach 2:
The sedimentation pocket acts as an intermediary between the oil inlet and the filter cartridge. It mediates the particle-laden oil flow by removing a significant portion of particles beforehand, thereby reducing the stress and pressure buildup on the filter cartridge.
3Object-affected harmful factors
If a simple filtration system is used, then the device complexity is low, but the system cannot effectively remove heavier particles that cause FOD
Solution Approach 1:
The sedimentation pocket converts the harmful effect of gravity (which causes particles to settle) into a beneficial pre-filtration mechanism. By allowing heavier particles to settle under gravity before reaching the filter, the system effectively removes FOD-causing particles while adding minimal structural complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The sedimentation pocket effectively pre-filters the oil, reducing the load on the filter cartridge and extending its lifespan, while the bypass system ensures continuous oil flow even when the filter is clogged, preventing debris from entering the oil system during maintenance.
Implementation Method 1
flowing the oil flow past a pocket defined by the inlet conduit, thereby allowing a portion of particles in the oil flow to sink by gravity in the sedimentation pocket
Data Source
AI summary
A filter assembly, has: a housing defining an internal volume and an outlet fluidly connectable to an oil system; a filter cartridge removably received within the internal volume of the housing; and an inlet conduit defining an inlet fluidly connectable to the oil system, the inlet conduit being in fluid flow communication with the internal volume of the housing, the inlet conduit having: a wall circumscribing a main flow passage from the inlet to the internal volume, and a sedimentation pocket defined by the wall, the sedimentation pocket extending downwardly away from the main flow passage and in a direction having a component parallel to a direction of a gravity when the filter assembly is in use.