Centrifugal Crankcase Gas Separator with Segmented Flow Paths
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Solution Overview
Problem
Existing centrifugal separators for cleaning crankcase gases in internal combustion engines face challenges in structurally simple and effective separation of impurities, leading to potential mixing of clean and dirty gas streams, which complicates the design and installation.
Innovation Solution
The design features a radially outer ring element with distinct openings for impurity and gas discharge, an intermediate conical plate for flow reversal, and strategically placed annular channels and nozzles to ensure separate and efficient flow paths for impurities and clean gases, simplifying the structural design and installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a centrifugal separator is used to separate impurities from crankcase gases, then separation effectiveness is improved, but the risk of mixing between clean and dirty gas streams increases due to complex flow paths
Solution Approach 1:
The separator is divided into distinct functional zones: an inner region for dirty gas intake and impurity separation, and an outer region for clean gas discharge. The guide rings and intermediate plate create segmented flow paths that physically isolate the dirty and clean gas streams, preventing mixing while maintaining effective separation.
Solution Approach 2:
An intermediate plate is introduced as a mediator element between the inner and outer regions. This plate with its specific opening configuration acts as a flow distributor and separator, ensuring that dirty gases are directed to the impurity separation zone while clean gases are channeled to the discharge zone, thereby preventing stream mixing.
2Manufacturing precision
If multiple guide rings and intermediate plates are added to improve flow distribution, then separation performance is improved, but device complexity increases
Solution Approach 1:
Multiple guide rings and the intermediate plate are merged into a single integrated rotor assembly that rotates together as one unit. This combining of multiple flow-distributing elements into a unified rotating structure simplifies the overall device architecture while maintaining the flow distribution performance needed for effective separation.
Solution Approach 2:
The rotating rotor assembly serves multiple functions simultaneously: it distributes gases to different zones, creates centrifugal force for separation, and maintains the structural integrity of the separator. The guide rings and intermediate plate work together as a multi-functional system that achieves both flow distribution and separation in a single rotating component.
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
This configuration effectively separates impurities and clean gases, reducing the risk of mixing and simplifying the structural design and installation, while optimizing flow conditions within the centrifugal separator.
Implementation Method 1
the centrifugal effect causing impurities, in particular oil droplets, which are deposited on the guide rings to be thrown off
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The device has a radially outer annular element i.e. ring metal sheet (7) including an opening (7b) for discharging of contaminations to corresponding annular duct (2b) that is formed in a housing (2). The annular element comprises another opening (7a) for discharging purified gas to corresponding another annular duct (2a). A radially inwardly projecting, conical intermediate ring i.e. partition plate (8), is provided between guidance rings (5, 6) on the annular element. The intermediate ring radial internally interconnects annular chambers (9, 10) formed on two sides of the intermediate ring.