Interstage Oil Rod Injection for Uniform Screw Compressor Cooling
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Solution Overview
Problem
Existing screw compressor systems face inefficiencies in lubricant/coolant delivery and distribution, particularly in oil flooded contact cooling systems, which affect the cooling and lubrication effectiveness for compressing working fluids like air.
Innovation Solution
The introduction of an oil rod with strategically positioned orifices or openings that atomize and distribute lubricant/coolant in an interstage region between compressor stages, ensuring uniform coating of rotor surfaces and efficient heat removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional lubricant injection systems are used in screw compressors, then the system structure is simple, but the lubricant distribution uniformity and cooling effectiveness are insufficient
Solution Approach 1:
The injection rod is segmented with multiple openings distributed along its length, allowing lubricant to be injected at multiple locations simultaneously. This segmentation enables uniform lubricant distribution across the rotor surfaces while maintaining a relatively simple single-rod injection structure, resolving the contradiction between distribution uniformity and system complexity.
2Temperature
If lubricant injection is increased to improve cooling effectiveness, then the cooling performance improves, but the energy consumption and system complexity increase
Solution Approach 1:
The injection rod utilizes the existing compressed air flow field and pressure differential to automatically distribute lubricant throughout the compression chamber. The system leverages the natural flow dynamics rather than requiring additional powered injection mechanisms, achieving effective cooling while minimizing additional energy consumption.
3Manufacturing precision
If lubricant is injected at a single location, then the injection system is simple, but the lubricant cannot uniformly coat the rotor surfaces
Solution Approach 1:
The injection rod extends in the axial dimension of the compression chamber, with openings distributed along its length. This dimensional extension allows lubricant to be injected at multiple axial positions simultaneously, achieving uniform rotor surface coating without requiring complex multi-point injection systems from multiple directions.
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
Enhances lubrication and cooling efficiency by providing a consistent and effective lubricant distribution, improving the overall performance and longevity of the compressor system.
Implementation Method 1
an oil rod with strategically positioned orifices or openings that atomize and distribute lubricant/coolant
Implementation Method 2
efficient heat removal
Implementation Method 3
enhances lubrication and cooling efficiency by providing a consistent and effective lubricant distribution
Data Source
AI summary
A compressor is disclosed which can include a first stage and a second stage. In one form the compressor includes contact cooled compressor stages. The compressor can include a rod useful to inject a lubricant for purposes of cooling/lubricating/sealing the rotating components of the compressor. In one form the rod is an elongate rod with openings which permit a lubricant such as oil to be injected. The injected oil can be atomized via the openings. The rod can be positioned in the interstage space between the first and second stages, and can include a variety of openings.