Rotary Electric Machine Housing With Integrated Gas and Oil Cooling
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Solution Overview
Problem
Existing rotary electric machine housings require separate heat exchangers for cooling compressed air and oil, leading to a large and inefficient system, as the refrigerant jacket needs to exchange heat with both the rotary electric machine, compressed air, and oil, reducing overall heat exchange performance.
Innovation Solution
A rotary electric machine housing with integrated gas, oil, and refrigerant flow paths, where the refrigerant flows through a series of heat exchange parts, including a rotary electric machine heat exchange part downstream of gas and oil heat exchange parts, enhancing heat exchange efficiency and eliminating the need for separate heat exchangers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate heat exchangers are provided for cooling compressed air and oil, then the cooling function is ensured, but the system size becomes large
Solution Approach 1:
The patent combines multiple heat exchange functions into a single integrated refrigerant jacket structure. The refrigerant jacket includes a rotary electric machine heat exchange part, a gas heat exchange part, and an oil heat exchange part, allowing one component to perform multiple cooling functions that would traditionally require separate heat exchangers
Solution Approach 2:
The refrigerant jacket is designed as a multi-functional component that simultaneously cools the rotary electric machine, the compressed air, and the oil through its integrated heat exchange parts, making a single component serve multiple cooling purposes
2Volume of stationary object
If the refrigerant jacket exchanges heat with multiple components (rotary electric machine, compressed air, and oil), then the system becomes compact, but the heat exchange performance decreases
Solution Approach 1:
The refrigerant jacket is segmented into distinct heat exchange parts: a rotary electric machine heat exchange part, a gas heat exchange part, and an oil heat exchange part. Each segment is optimized for its specific heat exchange function, allowing efficient thermal transfer to multiple components without compromising overall performance
Solution Approach 2:
Different regions of the refrigerant jacket are designed with different local characteristics to optimize heat exchange for specific purposes. The gas heat exchange part and oil heat exchange part have configurations tailored to their respective cooling needs, ensuring high heat exchange performance in each local region
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 improves heat exchange efficiency by ensuring the refrigerant effectively cools both the rotary electric machine and supplied gases and oils before their temperatures rise, resulting in a more compact and efficient cooling system.
Implementation Method 1
a rotary electric machine heat exchange part in which the refrigerant exchanges heat with the rotary electric machine
Implementation Method 2
a gas heat exchange part in which the refrigerant exchanges heat with the gas flowing through the gas flow path
Implementation Method 3
an oil heat exchange part in which the refrigerant exchanges heat with the oil flowing through the oil flow path
Data Source
AI summary
A rotary electric machine housing accommodates a rotary electric machine. The rotary electric machine housing has a body portion, a gas flow path through which a gas flows, an oil flow path through which an oil flows, and a refrigerant flow path through which a refrigerant flows inside. The refrigerant flow path includes a rotary electric machine heat exchange part in which the refrigerant exchanges heat with the rotary electric machine, a gas heat exchange part in which the refrigerant exchanges heat with the gas flowing through the gas flow path, and an oil heat exchange part in which the refrigerant exchanges heat with the oil flowing through the oil flow path. The rotary electric machine heat exchange part is provided downstream of the gas heat exchange part and the oil heat exchange part in a flow direction of the refrigerant.