Screw Compressor Oil Management via Sealing Panel
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Solution Overview
Problem
Screw compressors for utility vehicles face challenges in efficiently and simply removing oil from compressed air, as existing external oil coolers increase system inertia and require additional structural space and fastening means, while also allowing oil droplets and vapors to spread throughout the compressor housing.
Innovation Solution
A screw compressor design featuring a sealing panel with passage openings that projects out of an oil sump, limiting the displacement of oil droplets and vapors within the housing, and an asymmetrically divided interior to direct oil accumulation back into the sump, reducing oil introduction into the air/oil separator and simplifying oil return through gravitational flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If an external oil cooler is provided to regulate oil temperature, then oil temperature control is improved, but device complexity increases due to additional pipes, hoses, and mechanical accommodation requirements
Solution Approach 1:
The patent integrates the oil cooling function directly into the housing structure by forming a cooling chamber within the housing and using the housing wall as part of the cooling system. This eliminates the need for separate external oil coolers, pipes, and hoses, thereby reducing device complexity while maintaining temperature control capability
Solution Approach 2:
The housing serves multiple functions: it contains the compressor components, provides structural support, and simultaneously acts as a thermal management system through the integrated cooling chamber. The housing wall functions both as a structural boundary and as a thermal barrier, allowing the same component to fulfill multiple roles
2Temperature
If an external oil cooler is provided, then oil temperature control is improved, but the total quantity of oil increases due to additional oil required to fill the external volume
Solution Approach 1:
The cooling chamber is formed within the existing housing volume rather than adding external cooling components. This integration ensures that the oil cooling system uses the same oil already present in the compressor, eliminating the need for additional oil to fill external cooler volumes
3Quantity of substance
If oil droplets and vapors are allowed to pass into all regions of the housing, then oil distribution is improved, but oil removal from compressed air becomes more difficult
Solution Approach 1:
The housing interior is divided into distinct regions: a first region where oil droplets and vapors are allowed to pass for distribution, and a second region that is substantially free of such oil contaminants. The seal with passage openings creates this segmentation, enabling oil to be distributed where needed while preventing it from reaching the compressed air outlet region
Solution Approach 2:
The seal with multiple passage openings acts as an intermediary element between the oil-containing region and the oil-free region. It allows controlled passage of small oil droplets and vapors through the passage openings while blocking larger oil contaminants, thereby mediating the transition between regions with different oil concentrations
4Stability of the object's composition
If the housing interior is divided symmetrically, then structural balance is improved, but oil accumulation and return to sump becomes less efficient
Solution Approach 1:
The housing interior is divided asymmetrically into a smaller first region and a larger second region. This asymmetric configuration optimizes oil management by concentrating oil accumulation in the larger second region while keeping the oil-containing first region compact, thereby improving gravitational return of oil to the sump and enhancing overall productivity
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 design effectively captures and recycles oil droplets and vapors, reducing oil introduction into the air/oil separator, allowing for a smaller separator form and easier manufacturing, while maintaining oil in lower regions of the compressor and simplifying oil return, thus enhancing oil management and compressor efficiency.
Implementation Method 1
small oil droplets, oil aerosols or an oil vapor are/is present above the oil sump... small oil droplets and oil aerosols accumulate and can be separated off on the sealing panel
Implementation Method 2
the first region, which is formed so as to be smaller than the second region... simplifying oil return through gravitational flow... maintaining oil in lower regions of the compressor
Data Source
AI summary
A screw compressor for a utility vehicle includes at least one housing, at least one housing cover and at least one rotor housing. At least one seal is provided, wherein, when assembled, there is an oil sump in the housing, and the seal is arranged between the housing cover and the rotor housing and projects out of the oil sump with respect to the assembled state. The seal is formed as a sealing plate and has multiple passage openings.