Compressor Cooling Paths and Transfer Tube for Bearing Heat Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Air machines, such as those used in aircraft, face heat accumulation issues at bearings and motors, leading to inefficiencies and potential damage due to inadequate cooling systems.
Innovation Solution
A compressor design featuring a rotor driven by a shaft with journal and thrust bearings, utilizing a transfer tube to provide cooling air to specific bearings and the motor, with a seal and heat shield to direct cooling streams effectively and prevent pressure loss and thermal insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling air is provided to bearings and motor, then heat accumulation is reduced, but device complexity increases due to multiple cooling paths and transfer tubes
Solution Approach 1:
The cooling system is segmented into distinct cooling paths: a first cooling path for journal bearings, a second cooling path for the motor, and a third cooling path for thrust bearings. Each path is controlled independently through separate valves, allowing targeted cooling of specific components without requiring a single complex integrated system.
Solution Approach 2:
Transfer tubes act as intermediary components that deliver cooling air from the cooling air source to specific bearings and the motor. These transfer tubes simplify the overall system architecture by providing dedicated conduits for cooling flow, reducing the need for complex routing arrangements.
2Temperature
If cooling air flows through first journal bearing, then cooling is provided, but pressure loss occurs affecting downstream components
Solution Approach 1:
The cooling system divides the cooling air flow into separate segments: a first cooling path for journal bearings and a third cooling path for thrust bearings. By providing independent cooling paths with separate valve control, the system maintains adequate cooling pressure for each component without the cumulative pressure losses that would occur in a single串联 (series) cooling arrangement.
Solution Approach 2:
The system employs dynamically controllable valves that can adjust the distribution of cooling air to different bearings based on operational conditions. This dynamic control allows optimization of cooling effectiveness while maintaining sufficient pressure at each cooling point, adapting to varying thermal loads and flow requirements.
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
The compressor's cooling system efficiently directs cooling air to critical components, reducing heat accumulation and enhancing the reliability and longevity of bearings and motors by maintaining pressure and minimizing thermal exposure.
Implementation Method 1
A transfer tube is configured to provide cooling air from a bearing cooling air inlet to the second journal bearing
Implementation Method 2
a seal and heat shield to direct cooling streams effectively and prevent pressure loss
Implementation Method 3
a seal and heat shield to direct cooling streams effectively and prevent pressure loss and thermal insulation
Data Source
AI summary
A compressor includes a rotor configured to compress air and driven by a shaft. A motor is drives the shaft. The first and second journal bearings facilitate rotation of the shaft. The first journal bearing is upstream from the motor and the second journal bearing is downstream from the motor. The transfer tube is configured to provide cooling air from a bearing cooling air inlet to the first journal bearing. A method for cooling a compressor is also disclosed.