Stator Discharge Pipe Layout for Uniform Rotary Machine Cooling
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Solution Overview
Problem
Existing rotary electric machines face inefficiencies due to inadequate cooling, particularly at the second end of the stator, leading to hot spots and degraded performance, as current cooling configurations fail to accurately regulate temperature distribution and adapt to varying operational conditions.
Innovation Solution
A stator design featuring a cylindrical magnetic mass with uniformly distributed longitudinal channels, multiple bundles of compacted magnetic sheets separated by spacers forming discharge pipes, and a fluid distribution system with adjustable flow regulation to ensure balanced cooling across the stator, including manifolds and collecting chambers with control valves to manage fluid flow and temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single radial or central channel is used to supply coolant to longitudinal channels, then the device complexity is reduced, but the temperature regulation precision deteriorates
Solution Approach 1:
The cooling system is segmented into multiple independent radial channels (first radial channel, second radial channel, etc.) instead of using a single central channel. Each radial channel supplies coolant to specific longitudinal channels, enabling segmented temperature control of different stator regions. This segmentation allows precise regulation of temperature distribution while maintaining reasonable device complexity.
2Manufacturing precision
If fixed passage sections are used for coolant flow, then the manufacturing precision is improved, but the adaptability to varying operational conditions deteriorates
Solution Approach 1:
The cooling system incorporates adjustable flow regulation mechanisms (control valves, adjustable passage sections) that allow dynamic adjustment of coolant flow rates and distribution. This enables the system to adapt to varying operational conditions such as different rotational speeds and cooling requirements, while the passage sections are manufactured with precise dimensions for nominal operation.
3Device complexity
If coolant is injected from a single end of the stator, then the device complexity is reduced, but the temperature uniformity deteriorates
Solution Approach 1:
The cooling system provides different cooling intensities to different regions of the stator based on local thermal requirements. Multiple radial channels are strategically positioned to supply coolant to specific zones, and longitudinal channels are distributed to ensure uniform temperature distribution throughout the magnetic mass. This local quality approach ensures temperature uniformity while avoiding excessive device complexity.
4Temperature
If the coolant passage sections are enlarged to improve cooling capacity, then the temperature regulation is improved, but the device complexity increases
Solution Approach 1:
The cooling system utilizes the radial dimension by introducing multiple radial channels that extend from the stator frame to the magnetic mass. This radial arrangement allows coolant to be distributed across different radii, improving cooling effectiveness without requiring excessive enlargement of individual passage sections. The longitudinal channels then distribute coolant axially through the magnetic mass, providing comprehensive cooling coverage.
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 regulates temperature distribution, reduces hot spots, and adapts cooling capacity to operational changes, enhancing the efficiency and performance of rotary electric machines by ensuring uniform cooling and real-time power adjustment.
Implementation Method 1
The magnetic mass comprises longitudinal channels 7 wherein a coolant circulates
Implementation Method 2
the fluid heats up and leaves a second end O of the stator
Data Source
AI summary
The stator for rotary electric machine comprises a stator frame and a cylindrical magnetic mass inserted in the stator frame, the magnetic mass including a plurality of stacks of compacted magnetic sheets and longitudinal channels uniformly distributed over at least one diameter of the magnetic mass, the channels leading to each side of the magnetic mass.At least three bundles of compacted magnetic sheets are separated by spacers forming two discharge pipes extending circumferentially and radially between the stator frame and a central housing of the stator intended to receive a rotor of the rotary electric machine and communicating with the channels, the stator frame comprising at least two discharge openings connected to different pipes such that a fluid injected on either side of the magnetic mass escapes from the stator via the discharge pipes, the fluid passage section of the discharge pipes being configured to modify the temperature distribution in the magnetic mass.