Generator Bearing Holder Cooling Flow Path Design
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Solution Overview
Problem
Generators with enclosed housings struggle to effectively remove heat generated in bearings, leading to potential damage and deformation due to inadequate cooling, while open-housing designs with air flow paths between rotors and stators fail to sufficiently dissipate heat from components like bearings.
Innovation Solution
A generator design featuring a housing with strategically placed holes and fins or paths on the bearing holders to create a flow path for cooling air, allowing direct heat dissipation from the bearing, enhancing air flow and heat transfer efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fully enclosed housing is used, then the generator structure is protected and complete, but heat generated in the bearing cannot be effectively removed
Solution Approach 1:
The housing is segmented with specifically positioned holes (first holes in front cover, second holes in rear cover, third holes in fan cover) that divide the internal space into distinct cooling zones, allowing targeted heat removal from the bearing area while preserving the enclosed protective structure
Solution Approach 2:
Cooling air acts as an intermediary substance that flows through the housing holes and bearing holder flow paths, transferring heat from the bearing to the external environment. The air serves as the heat transfer medium that enables thermal management within the enclosed housing
2Temperature
If air flow path is formed only through gap between rotor and stator, then cooling is provided for electromagnetic components, but heat generated in bearing cannot be effectively removed
Solution Approach 1:
The cooling system is segmented into multiple independent flow paths: one through the rotor-stator gap for electromagnetic component cooling, and another through the bearing holder (with fourth holes and flow paths) for bearing heat removal, allowing simultaneous cooling of different components
Solution Approach 2:
Different regions of the housing and bearing holder are given different cooling characteristics - the rotor-stator gap provides cooling for electromagnetic components, while the bearing holder with its dedicated holes and flow paths provides localized cooling for the bearing area
3Device complexity
If cooling air volume passing through bearing is insufficient, then housing structure remains simple, but thermal damage to bearing occurs
Solution Approach 1:
The bearing holder is segmented with multiple cooling features including first holes, second holes, third holes, and flow paths that collectively increase the cooling air volume without requiring a completely redesigned housing structure
Solution Approach 2:
Cooling flow paths are created in multiple dimensions and orientations within the bearing holder, with holes and paths arranged to maximize air flow through the bearing area from different directions, increasing effective cooling surface area and air volume
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 removes heat from the bearing, preventing thermal damage and maintaining generator stability by increasing the thermal cross-sectional area and securing a direct flow path for cooling air, thus ensuring efficient heat dissipation and rigidity.
Implementation Method 1
a fan installed inside the fan cover to cause a flow of an air passing through the inside of the housing
Implementation Method 2
a fan installed inside the fan cover to cause a flow of an air passing through the inside of the housing
Implementation Method 3
the bearing holder may effectively remove heat generated in the bearing by forming a flow path of the air flowing by the fan in at least one of an inner side and an outer side
Data Source
AI summary
A generator includes a housing; a rotational shaft at least partially inserted into the housing; a rotor coupled to the rotational shaft and rotated together when the rotational shaft is rotated; a stator positioned between an inner surface of the housing and an outer surface of the rotor; a cooling module including a fan cover coupled to the housing, and a fan installed inside of the fan cover to generate a flow of an air passing through an inside of the housing; and a rotation support part including a cylindrical bearing holder positioned inside of the housing, and a bearing which is coupled to an inner circumferential surface of the bearing holder and rotatably supports the rotational shaft, the bearing holder forming a flow path of the air blown by the fan in at least one of an inner side or an outer side.