Screw compressor having working chamber closing member to regulate suction working medium flow to a working chamber
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Solution Overview
Problem
Screw compressors face challenges in achieving high energy efficiency and reducing acceleration loss of the working medium, particularly at high speeds, due to increased suction resistance and flow resistance issues.
Innovation Solution
The design incorporates a screw compressor with a male and female rotor that rotate while meshing, featuring a casing with a bore forming a working chamber, a drive unit, and a working chamber closing unit with open spaces between the rotor shafts to reduce flow resistance and enhance suction efficiency, allowing smooth medium suction with low resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the screw compressor is driven at higher speeds to achieve high energy efficiency and large air volume, then the energy efficiency and capacity are improved, but the acceleration loss of the working medium increases due to increased suction resistance
Solution Approach 1:
The suction space is divided into multiple regions by providing plural suction ports at different positions (axial and radial directions) and creating open spaces between rotor shafts. This segmentation allows the working medium to enter through multiple pathways simultaneously, distributing the flow and reducing acceleration loss while maintaining high suction efficiency at elevated speeds.
Solution Approach 2:
Suction ports are positioned in multiple dimensions including axial directions and radial directions of the rotors. This multi-dimensional arrangement creates comprehensive flow pathways that reduce resistance by allowing the working medium to approach the working chamber from various directions, thereby reducing acceleration loss while maintaining high energy efficiency.
2Productivity
If the speed of the working medium flowing into the working chamber is accelerated quickly to increase flow rate, then the capacity is improved, but the suction resistance increases causing energy loss
Solution Approach 1:
Multiple suction ports are distributed at different positions including axial and radial directions. This segmentation creates multiple parallel flow pathways that collectively provide high flow rate capability while each individual pathway experiences lower resistance, thus maintaining energy efficiency.
Solution Approach 2:
Open spaces between the male and female rotor shafts serve as intermediary flow regions that connect the suction ports to the working chamber. These intermediary spaces facilitate smooth transitions and reduce resistance by providing gradual acceleration zones for the working medium.
Data Source
AI summary
A screw compressor for compressing a working medium sucked through a suction opening and discharging the compressed working medium through a delivery opening, wherein the screw compressor includes: a male rotor and a female rotor that rotate while meshing with each other; a casing that houses the male rotor and the female rotor and is provided with a bore which forms a working chamber designed, together with the male rotor and the female rotor, to compress the working medium; a drive unit that rotationally drives at least one of the male rotor and the female rotor; a working chamber closing unit that forms a suction port for sucking the working medium into the working chamber and closes the working chamber when the working chamber reaches a specified capacity; and a suction space that connects the suction opening and the suction port to allow communication therebetween.