Engine Generator Cooling Structure for Multi-Directional Stator Cooling
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Solution Overview
Problem
The increasing heat generation in utility vehicle generators due to higher power demands for electrical components necessitates improved cooling performance for the stator, as existing cooling methods are inadequate in managing the increased heat.
Innovation Solution
A generator cooling structure that includes a cooling medium supply passage on both sides of the crankshaft, allowing direct cooling medium supply to the stator, enhancing cooling performance and design flexibility by utilizing both ends of the crankshaft for cooling, even if one end cannot be used for cooling medium introduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a generator with high power output is mounted to meet increasing electrical component power demands, then the power generation capability is improved, but the heat generated by the stator increases, worsening the cooling performance
Solution Approach 1:
The patent introduces a cooling medium supply passage that supplies cooling medium to the stator from the radial direction (one end side of the crankshaft), adding a new dimension to the cooling approach. This radial cooling path complements any existing cooling methods and directly targets the stator's heat generation zones, enabling effective cooling even as power output and heat generation increase
2Device complexity
If cooling medium is supplied only from one direction to the stator, then the cooling structure is simple, but the cooling performance is insufficient for high power generators
Solution Approach 1:
The cooling system is segmented into multiple cooling medium supply passages: one supplying cooling medium to one end side of the stator and another supplying cooling medium to the other end side of the stator. This segmentation allows cooling medium to reach different thermal zones of the stator independently, improving overall cooling performance without creating a overly complex integrated system
Solution Approach 2:
Different regions of the stator are cooled by cooling medium supplied from different directions through separate supply passages. The cooling medium is directed to specific end sides of the stator where heat generation occurs, providing localized cooling quality matched to the thermal characteristics of each stator region
3Ease of manufacture
If the stator is cooled by oil ejected from below the crankcase and guided upward along the generator cover, then the cooling structure is simple, but the cooling performance is insufficient when the stator surface on the other end side cannot be used for cooling
Solution Approach 1:
The cooling medium supply passages are designed to supply cooling medium to both end sides of the stator, making the cooling system versatile and adaptable. This multi-directional cooling capability allows the system to function effectively regardless of which stator surface is accessible, providing design flexibility for various generator configurations and mounting arrangements
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 solution effectively improves stator cooling performance by supplying cooling medium from multiple directions, enhancing heat management and design flexibility, thus addressing the increased heat generation challenges.
Implementation Method 1
a cooling medium supply passage, which is arranged in a direction of the one end side of the crankshaft in the stator in order to supply a cooling medium to the stator
Implementation Method 2
a cooling medium supply passage, which is arranged in a direction of the one end side of the crankshaft in the stator in order to supply a cooling medium to the stator
Data Source
AI summary
A generator cooling structure of an engine including a crankshaft and a generator arranged on one end side of the crankshaft includes a crankcase that houses the crankshaft and a generator cover that is coupled to the crankcase in order to house the generator. The generator has a rotor fixed to the crankshaft and a stator fixed in position with respect to the generator cover. A cooling medium supply passage, which is arranged in the direction of the one end side of the crankshaft in the stator in order to supply the cooling medium to the stator, is provided.