Rotating Electric Machine Layout to Prevent Terminal Oil Contamination
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Solution Overview
Problem
The concern in existing combined power systems is that lubricating oil leakage from oil auxiliary devices can contaminate the electric terminals of the rotating electric machine system.
Innovation Solution
The oil auxiliary device group is positioned below the electric terminals, and the fuel auxiliary device group is positioned below the electric terminals and ignition device, with both groups being supported by the rotating electric machine housing, preventing direct contact with lubricating oil and fuel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the oil auxiliary device group is positioned near the bearing for efficient lubrication supply, then the lubrication efficiency is improved, but the electric terminal may be contaminated by leaking lubricating oil
Solution Approach 1:
The patent resolves the spatial conflict by transitioning from a two-dimensional planar arrangement to a three-dimensional vertical arrangement. The oil auxiliary device group is positioned in the lower portion of the housing while the electric terminal is positioned in the upper portion, creating vertical separation that prevents oil contamination while maintaining lubrication efficiency through dedicated supply passages.
2Object-affected harmful factors
If the oil auxiliary device group is positioned away from the electric terminal to prevent contamination, then the contamination risk is reduced, but the lubrication supply efficiency may deteriorate
Solution Approach 1:
The patent introduces oil supply passages as intermediary channels that connect the oil auxiliary device group to the bearing. These passages act as mediators that enable efficient lubrication supply while maintaining spatial separation between the oil auxiliary devices and the electric terminal, thus preventing contamination.
3Device complexity
If multiple oil auxiliary devices are arranged in a compact group, then the device complexity is reduced, but the layout flexibility is limited
Solution Approach 1:
The patent segments the housing into distinct vertical zones: the lower portion accommodates the oil auxiliary device group and the upper portion accommodates the electric terminal. This segmentation allows for compact arrangement of multiple oil auxiliary devices while maintaining layout flexibility through the vertical division of functional zones.
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
Prevents contamination of electric terminals and ignition device by lubricating oil and fuel, maintains efficient lubrication and cooling of bearings, facilitates easy maintenance, and improves layout flexibility.
Implementation Method 1
a bearing (270, 280) that supports the rotating shaft (204)
Implementation Method 2
an oil auxiliary device group (150) including a plurality of oil auxiliary devices (152) that supply a lubricating oil (LO) to the bearing (270, 280)
Data Source
AI summary
In a combined power system, a rotating electric machine system includes a rotating electric machine, a rotating electric machine housing, an electric terminal, and an oil auxiliary device group. Bearings support a rotating shaft in the rotating electric machine housing. The oil auxiliary device group supplies lubricating oil to the bearings. The oil auxiliary device group is supported by the rotating electric machine housing and is positioned below the electric terminal.