Screw Rotor Liquid Dispersion for Compressor Cooling
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Solution Overview
Problem
Existing screw compressors face challenges in dispersing liquid uniformly within the compression chamber, leading to inefficient cooling and sealing, as the liquid injected from inclined small holes tends to disperse orthogonally rather than longitudinally, limiting the expansion of the heat transfer region and compression efficiency.
Innovation Solution
The fluid machine incorporates a liquid supply section configured to disperse liquid in the longitudinal direction of the screw rotor's grooves, using nozzles with inclined injection holes or slit sections to ensure wide dispersion along the grooves, promoting efficient cooling and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If liquid is injected from inclined small holes in the water supply section, then liquid can be supplied to the compression working chamber, but the liquid disperses orthogonally rather than longitudinally, limiting the dispersion range along the groove direction
Solution Approach 1:
The patent inverts the conventional injection approach by changing the hole arrangement from inclined small holes to multiple nozzles with different inclination angles. Specifically, nozzles are arranged with first nozzles inclined at angle α and second nozzles inclined at angle β, where the angles differ, creating complementary dispersion patterns that together achieve longitudinal coverage along the groove
Solution Approach 2:
The water supply section is segmented into multiple independent nozzles rather than using a single injection point. Each nozzle targets a specific region along the groove with its own inclination angle, dividing the dispersion task into multiple directional components that collectively cover the longitudinal extent of the groove
2Temperature
If water is injected to disperse in a wide range, then cooling effect and sealing are improved, but the directivity of water dispersion is not considered, resulting in inefficient use of injected water
Solution Approach 1:
Different nozzles are assigned different inclination angles tailored to their specific positions and functions. First nozzles with angle α target one region while second nozzles with angle β target another region, optimizing liquid distribution locally in each zone to maximize cooling efficiency and sealing effectiveness where needed
Solution Approach 2:
The patent changes the parameter of nozzle inclination angle from a single uniform value to multiple varied values. By adjusting the inclination angles of different nozzles, the system optimizes liquid dispersion patterns to achieve both wide coverage and efficient use of injected water, improving cooling and sealing while reducing energy loss
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 enhances the cooling effect of compressed gas, reduces compression power, and improves compression efficiency by ensuring the liquid is sealed over a wider range, resulting in energy savings and reduced internal leaks.
Implementation Method 1
the heat transfer region between the compressed gas and liquid expands, the cooling effect of the compressed gas due to the liquid can be promoted
Implementation Method 2
The purpose of liquid supply is to seal an internal clearance, cool the gas in the compression process, lubricate sliding both female and male rotors
Data Source
Figure 1A
Figure 1B
Figure 2~3
AI summary
Provided is a fluid machine configured such that liquid supplied to a working chamber from the outside of the fluid machine is dispersed extensively in the working chamber. This fluid machine is constituted of a screw rotor and a casing for accommodating the screw rotor and is provided with a liquid supply section for supplying liquid into a working chamber from the outside. The liquid supply section is configured so that liquid is dispersed in the longitudinal direction of the tooth groove of the screw rotor rather than in the width direction thereof.