Rotary Electric Machine Gas Cooler Upper Casing Layout
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional rotary electric machines require a wide installation area due to their large width, limiting their installation flexibility without compromising cooling performance for stator coil ends.
Innovation Solution
The rotary electric machine design incorporates gas coolers housed in the casing's upper portion near stator coil ends, with a modified gas circulation passage that allows cooling gas to flow efficiently through the machine, reducing the machine's width by positioning one gas cooler outside the casing above each stator coil end and using partition walls to ensure effective cooling gas passage without obstructing the flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If four gas coolers are provided at the side surface of the rotary electric machine, then cooling performance for stator coil ends is improved, but the installation area increases
Solution Approach 1:
The gas coolers are repositioned from the side surface to the upper surface of the casing, utilizing the vertical dimension instead of horizontal space. This dimensional shift allows the coolers to be arranged above the stator coil ends without increasing the machine's footprint area, thereby maintaining cooling performance while reducing installation area.
Solution Approach 2:
The gas coolers are housed within gas cooler chambers that are integrated into the casing structure. This nesting approach allows the coolers to be contained within the existing casing volume rather than requiring external side-mounted space, effectively utilizing internal volume to reduce external footprint.
2Area of stationary object
If the entire rotary electric machine is made large in width direction, then space for gas coolers is increased, but the degree of freedom in installation becomes low
Solution Approach 1:
By moving gas coolers to the upper surface and utilizing vertical space, the invention eliminates the need to increase width, thereby maintaining installation flexibility and adaptability to various mounting configurations while still providing adequate space for gas cooler operation.
Solution Approach 2:
The gas circulation passage is designed with flexible routing that can adapt to the repositioned coolers, allowing the cooling system to maintain effectiveness regardless of the compact arrangement, thus preserving installation freedom.
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 decreases the installation area of the rotary electric machine while maintaining effective cooling performance for stator coil ends, enabling increased installation flexibility and potential energy savings and durability improvements.
Implementation Method 1
a gas cooler (14) housed in a gas cooler chamber (13) provided at an upper portion of a casing (2) in which both ends of a stator coil (6) are located
Implementation Method 2
a gas circulation passage is formed in which cooling gas circulates in the order of a space A provided at an intake side of a fan → a space B surrounding the fan → the gas cooler chamber (13) → the gas cooler (14)
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Gas coolers (14) one of which is housed in a gas cooler chamber (13) provided at an upper portion of a casing (2) and installed near an opening (15) of the casing (2) above each stator coil end (7), are provided. A gas circulation passage is formed in which a cooling gas circulates through a space A provided at an intake side of each fan (12) → a space B surrounding the fan (12) → the gas cooler chamber (13) → the gas cooler (14) → a space C including the stator coil end (7) → a gap (11) between a rotor (4) and a stator (3) and gas passages formed in the rotor (4) and the stator (3) → a space D between an outer periphery of the stator (3) and the casing (2) → the space A.