Motor Oil Pump Shaft Flow Paths for Faster Liquid Cooling
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Solution Overview
Problem
Existing motors face challenges in effectively controlling heat generation, particularly as their size increases, leading to limitations in density and cooling efficiency.
Innovation Solution
The motor design incorporates a housing with a cover and shaft that includes flow paths for fluid circulation, allowing for enhanced heat dissipation through multiple channels, including a first flow path in the shaft and a second flow path between the shaft and the cover, with the first path introducing a greater amount and speed of fluid to enhance cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If air cooling is used for the motor part, then the structure remains simple, but heat control becomes insufficient when the motor size increases
Solution Approach 1:
The patent introduces a liquid cooling system using oil as the cooling medium. The oil circulation system includes a pump part that circulates oil through flow paths in the housing, enabling efficient heat removal from the motor part. This hydraulic cooling approach replaces insufficient air cooling while managing thermal loads in larger motor configurations.
Solution Approach 2:
The cooling system is divided into multiple flow paths: a first flow path through the housing and a second flow path through the shaft. This segmentation allows different regions of the motor to be cooled independently, optimizing heat removal efficiency while maintaining manageable system complexity.
2Power
If the motor part size is increased, then power output is improved, but heat dissipation becomes more difficult
Solution Approach 1:
The patent extends the cooling system into the axial dimension by introducing a first flow path through the housing and a second flow path through the shaft. This multi-dimensional fluid circulation approach enables effective heat dissipation in larger motor configurations where single-path cooling would be insufficient.
Solution Approach 2:
The oil circulation system provides efficient heat transfer capability that scales with motor size. The hydraulic cooling medium can carry away larger heat loads generated by higher power output, enabling the motor to operate at increased power levels without thermal limitations.
3Temperature
If fluid circulation paths are added to the housing and shaft, then cooling efficiency is improved, but device complexity increases
Solution Approach 1:
The shaft serves dual functions: mechanical power transmission and heat dissipation. The hollow shaft structure with internal flow paths enables the shaft to act as both a mechanical component and a cooling channel, eliminating the need for separate cooling structures and reducing overall system complexity.
Solution Approach 2:
The cooling flow paths are integrated into the existing motor structure. The first flow path is formed within the housing that already encloses the motor, and the second flow path is formed within the shaft that already transmits power. This merging of cooling functions with structural components reduces the number of additional parts required.
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 significantly improves cooling efficiency by quickly supplying fluid to the motor part, reducing filling time and enhancing heat exchange, thereby addressing the limitations of traditional air cooling methods.
Implementation Method 1
an amount of a fluid introduced through the first flow path is greater than an amount of a fluid introduced through the second flow path for a predetermined time
Implementation Method 2
a fluid in the cover is introduced into the housing along a hollow formed in the shaft and an outer surface of the shaft
Implementation Method 3
the fluid introduced through the first hole reduces friction between the cover and the shaft when the shaft rotates
Data Source
AI summary
The present invention may provide a motor including a housing including a motor part and a cover coupled to the housing and including a pump part, wherein the cover includes a first hole through which a first area in the cover communicates with a second area in the housing, the motor part includes a shaft passing through the first hole, a first flow path through which the first area communicates with the second area is formed in the shaft, a second flow path through which the first area communicates with the second area is formed between the shaft and the first hole, and an amount of a fluid introduced through the first flow path is greater than an amount of a fluid introduced through the second flow path for a predetermined time.