Compressor Body Internal Liquid Flow Path for Bearing and Chamber Supply
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Solution Overview
Problem
In liquid flooded type compressors, there is a challenge in optimizing the temperature of lubricant supplied to bearing chambers and compression working chambers, leading to imbalanced compressibility and rotation loss, which affects compression efficiency and cooling, and requires a complex and costly mechanism to manage temperatures separately.
Innovation Solution
A compressor body configuration with an internal liquid supply flow path that extends from the discharge side to the suction side, including a first flow path that supplies liquid to the bearing chamber, ensuring efficient viscosity management and sufficient pressure for lubrication, while also providing high-pressure liquid supply to compression working chambers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single liquid supply system is used for both bearing chambers and compression working chambers, then device complexity is reduced, but lubrication efficiency deteriorates due to inability to optimize viscosity for each chamber separately
Solution Approach 1:
The liquid supply system is segmented into multiple independent flow paths within the single liquid supply port structure. The port includes a first flow path for supplying liquid to bearing chambers and a second flow path for supplying liquid to compression working chambers, allowing separate viscosity optimization for each function while maintaining a unified port structure.
Solution Approach 2:
Different regions of the liquid supply port are designed with different flow characteristics to provide locally optimized liquid supply. The first flow path provides liquid at viscosity optimized for bearing lubrication, while the second flow path provides liquid at viscosity optimized for compression working chamber lubrication and cooling, achieving local quality differentiation within a single port.
2Temperature
If liquid is supplied at high pressure to compression working chambers, then cooling efficiency is improved, but rotation loss in bearing chambers increases due to excessive pressure
Solution Approach 1:
The liquid supply system is divided into separate flow paths that independently control pressure delivery. The second flow path delivers high-pressure liquid to compression working chambers for effective cooling, while the first flow path delivers appropriately pressurized liquid to bearing chambers, preventing excessive pressure and reducing rotation loss.
Solution Approach 2:
The system changes pressure parameters differently for different destinations. High pressure is applied to the second flow path for compression working chamber cooling, while the first flow path maintains lower pressure suitable for bearing lubrication, optimizing both cooling efficiency and minimizing rotation loss through parameter differentiation.
3Reliability
If separate temperature management systems are implemented for bearing chambers and compression working chambers, then lubrication and cooling efficiency are improved, but device complexity and cost increase
Solution Approach 1:
Multiple flow paths for different temperature management requirements are merged into a single integrated liquid supply port structure. The port simultaneously provides first and second flow paths that deliver liquid at different pressures and flow rates to bearing chambers and compression working chambers respectively, achieving separate temperature management without separate external systems.
Solution Approach 2:
The single liquid supply port performs multiple functions: it supplies liquid for bearing chamber lubrication through the first flow path and supplies liquid for compression working chamber cooling and lubrication through the second flow path. This multi-functional design eliminates the need for separate temperature management systems while maintaining optimization for each function.
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 allows for efficient liquid supply to both bearing and compression working chambers, optimizing viscosity for reduced rotation loss and ensuring sufficient lubrication and cooling, thereby improving compressor efficiency and reducing operational complexity and costs.
Implementation Method 1
an internal liquid supply flow path that extends from a discharge side of the compression working chambers as an upstream side to a suction side of the compression working chambers as a downstream side
Data Source
AI summary
A compressor body includes a compression mechanism including a screw rotor that compresses gas, a casing that accommodates the compression mechanism and defines a compression working chambers therein, a suction side bearing that rotatably supports the screw rotor, a bearing chamber that accommodates the suction side bearing, and a liquid supply port that communicates with the compression working chambers and supplies liquid supplied from the outside of the casing into the compression working chambers. The casing has an internal liquid supply flow path that extends from a discharge side of the compression working chambers as an upstream side to a suction side of the compression working chambers as a downstream side and that supplies the liquid to the liquid supply port. The internal liquid supply flow path has a downstream portion reaching the bearing chamber and supplies the liquid to the suction side bearing.