Gas-Liquid Separator With Two-Stage Impaction Media for Low Pressure Loss
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Solution Overview
Problem
Existing crankcase ventilation systems face inefficiencies in separating aerosols and oils from blowby gases, particularly in maintaining high velocity and directional change for effective oil separation.
Innovation Solution
A gas-liquid separator with two-stage impaction media, utilizing nozzles to accelerate blowby gas flow and jet-assisted devices to facilitate separation, incorporating first and second impaction media positioned at angles to enhance separation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single-stage impaction media is used, then the device complexity is low, but the separation efficiency is insufficient
Solution Approach 1:
The impaction media is divided into two distinct stages: a first impaction media and a second impaction media. The first impaction media performs initial oil separation, while the second impaction media performs final separation. This segmentation allows each stage to be optimized independently, improving overall separation efficiency without requiring a single complex multi-functional component.
Solution Approach 2:
The first impaction media and second impaction media are positioned at different spatial locations and orientations within the housing. The first impaction media is positioned to receive direct high-velocity gas flow, while the second impaction media is positioned downstream to capture remaining contaminants. This spatial arrangement in multiple dimensions enables sequential separation stages.
2Productivity
If high velocity is maintained through nozzles, then oil separation effectiveness is improved, but pressure loss increases
Solution Approach 1:
The separation process is segmented into two stages with respective impaction media. The first stage handles the bulk of oil separation using high-velocity flow from nozzles, while the second stage captures remaining contaminants at lower velocity. This segmentation reduces the velocity requirement for the second stage, thereby reducing overall pressure loss compared to a single-stage system requiring high velocity throughout.
Solution Approach 2:
The gas flow velocity is dynamically adjusted between the two impaction media stages. High velocity is maintained only where necessary (first impaction media area) to ensure effective oil separation, while the second impaction media operates at reduced velocity. This dynamic velocity profile optimizes separation effectiveness while minimizing pressure loss.
3Productivity
If directional change is increased for separation, then oil removal efficiency is improved, but momentum is reduced
Solution Approach 1:
The directional change is segmented across two impaction media rather than requiring a single sharp directional change. The first impaction media provides initial directional change and oil removal, while the second impaction media provides additional directional change for remaining contaminants. This segmentation allows gradual momentum reduction while maintaining effective oil removal.
Solution Approach 2:
The gas flow undergoes directional change in multiple dimensions as it passes through the first and second impaction media positioned at different orientations. This multi-dimensional directional change enables effective oil removal while distributing the momentum reduction across multiple stages rather than a single abrupt change.
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 two-stage impaction media effectively reduces contaminants in the cleaned blowby gas stream, maintaining high momentum and pressure, improving separation efficiency without significant pressure loss.
Implementation Method 1
One type of separator uses inertial impaction air-oil separation for removing oil particles from the crankcase blowby gas (or aerosol) by accelerating the blowby gas stream to high velocities through nozzles or orifices and directing same against an impactor, causing a sharp directional change effecting the oil separation.
Implementation Method 2
accelerating the blowby gas stream to high velocities through nozzles or orifices and directing same against an impactor, causing a sharp directional change effecting the oil separation
Data Source
AI summary
A gas-liquid separator includes a housing having a first housing portion defining a first housing volume and a second housing portion defining a second housing volume. The gas-liquid separator includes a plate positioned at least partially within the first housing volume. The gas-liquid separator includes a first impaction media positioned against the plate. The first impaction media extends in a first direction. The gas-liquid separator includes a second impaction media positioned against the plate. The second impaction media extends in a second direction, different than the first direction.