Compressor Rotor Ventilation Flow Path for Thermal Responsiveness
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Solution Overview
Problem
The existing compressor rotor designs, as described in Patent Document 1, suffer from a decrease in efficiency due to the re-pressurization of compressed air across multiple wheels, which increases the flow rate and lowers compressor efficiency, especially when trying to enhance thermal responsiveness across a wide range.
Innovation Solution
A compressor rotor design with a ventilation flow path that guides compressed gas between blade rows, featuring an introduction part, branch parts, and a collection part, allowing the gas to ventilate the rotor shaft extensively without returning to the compression flow path, thereby preventing re-pressurization and maintaining efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If compressed air is guided into the rotor shaft for each wheel to enhance thermal responsiveness, then the thermal responsiveness of the rotor shaft is improved, but the compressor efficiency deteriorates due to re-pressurization of the compressed air
Solution Approach 1:
The ventilation flow path is segmented into multiple functional sections: an introduction part that receives compressed air from the compression flow path, multiple branch parts that distribute the air to different rotor shaft regions, and a collection part that aggregates the air before discharge. This segmentation allows comprehensive ventilation of the rotor shaft interior without requiring separate ventilation systems for each wheel, thereby maintaining efficiency while improving thermal responsiveness.
Solution Approach 2:
The ventilation function is extracted from the compression flow path by creating a dedicated ventilation flow path that branches off from the compression flow path. The compressed air is taken out from the compression flow path at the introduction part, used for ventilating the rotor shaft, and then discharged through the collection part without returning to the compression flow path, preventing re-pressurization and efficiency loss.
2Temperature
If multiple wheels are provided to increase thermal responsiveness across a wide range, then the thermal responsiveness is improved, but the flow rate of compressed air to be re-pressurized increases, lowering compressor efficiency
Solution Approach 1:
The ventilation flow path serves multiple wheels simultaneously through its multiple branch parts, making it a universal ventilation system rather than separate ventilation paths for each wheel. This multi-functional design allows a single compressed air source to ventilate the entire rotor shaft across a wide range, avoiding the need to increase the flow rate for each additional wheel and maintaining compressor efficiency.
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 suppresses the deterioration in compressor efficiency by ensuring the compressed gas ventilates the rotor shaft without re-pressurization, enhancing thermal responsiveness and maintaining performance across a wide range.
Implementation Method 1
a ventilation flow path for guiding a compressed gas flowing between two blade rows, of the plurality of blade rows, adjacent in the axial direction to an interior of the compressor rotor shaft
Data Source
AI summary
A ventilation flow path for guiding a compressed gas flowing between two blade rows adjacent in an axial direction to an interior of a compressor rotor shaft is formed in the compressor rotor shaft. The ventilation flow path has an introduction part, a plurality of branch parts, and a collection part. The introduction part guides the compressed gas flowing between the two blade rows into the compressor rotor shaft. The plurality of branch parts branch out from the introduction part, and are formed in mutually different positions in the axial direction. The collection part is connected to each of the plurality of branch parts. The compressed gas flows into the collection part after passing through the plurality of branch parts, and then, the compressed gas that has flowed in flows outside through the collection part.