Oil Mist Separator Deflector With Integrated Surface Structure
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Solution Overview
Problem
Existing oil mist separators for internal combustion engines are complex to produce and have limited separating efficiency, requiring separate attachment of separator materials which increases mounting and material costs.
Innovation Solution
A surface structure with alternating elevations and recesses is integrated with the deflector body, slowing down the gas stream and enhancing oil separation efficiency by directing oil particles to be collected at the bottom, eliminating the need for separate attachment and simplifying production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate separator material is attached to the deflector body, then the separating efficiency is improved, but the device complexity and mounting expenditure increase
Solution Approach 1:
The separating region is integrated directly into the deflector body as an integral component, merging the separator material and deflector body into a single unified structure. This eliminates the need for separate attachment, reducing device complexity and mounting expenditure while maintaining separating efficiency through the optimized surface structure with elevations and recesses
2Reliability
If a separate separator material is attached to the deflector body, then the separating efficiency is improved, but the material expenditure and production cost increase
Solution Approach 1:
The separating region is formed as an integral part of the deflector body during the same production process, eliminating the need for separate separator material and attachment operations. This reduces material expenditure and production cost while achieving improved separating efficiency through the integrated surface structure
3Productivity
If the gas stream velocity is high, then the throughput is improved, but the oil separation efficiency decreases
Solution Approach 1:
The surface structure features localized elevations and recesses that create varying flow conditions across different regions of the separating region. These local variations slow down the gas stream in specific areas, enhancing oil particle separation efficiency while maintaining overall throughput capability
Solution Approach 2:
The surface structure introduces a third dimension with elevations and recesses, creating a complex three-dimensional flow path that naturally slows down the gas stream without requiring reduction of the overall throughput. The gas flows through and over the surface features, increasing residence time for separation while maintaining flow rate
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 integrated surface structure improves oil separation efficiency, reduces production and mounting costs, and provides a stable and strong design by distributing elevations and recesses uniformly across the separating region, allowing for effective collection of oil particles.
Implementation Method 1
The gas that is laden with the aerosol oil impacts in the streaming region of the at least one nozzle on the separating region of the deflector body. The gas is deflected upon impact and flows along the separating region
Implementation Method 2
The oil particles impact on the surface of the separating region, are thereby separated from the gas, and sink, as a result of the force of gravity, along the separating region in downward direction to the bottom where they can be collected
Implementation Method 3
The elevations and recesses of the surface structure provide streaming obstacles which slow down the gas stream that is exiting from the at least one nozzle and, in this way, increase the separating efficiency
Data Source
AI summary
An oil mist separator for separating aerosol oil from an oil-laden gas has an impactor. The impactor has a nozzle device with at least one nozzle for gas to be freed from oil, wherein the at least one nozzle has a streaming region. The impactor further has at least one deflector body having a separating region for the oil, wherein the separating region is positioned in the streaming region of the at least one nozzle. The separating region has a surface structure that is monolithically formed with the at least one deflector body. The surface structure has elevations and recesses arranged alternatingly in all directions transversely to a main streaming direction of the at least one nozzle.