Power Transmission Flow Path Structure for Gas Removal
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Solution Overview
Problem
Conventional power transmission devices face issues with gas removal from lubricating fluids, leading to inadequate working pressure when air is suctioned along with lubricating oil, and the addition of a separate defoaming device increases the device's size.
Innovation Solution
A flow path structure within the power transmission device's casing, utilizing a discharge mechanism and a gasket with an extending portion to form a flow path that guides lubricating fluid from hydraulic operating mechanisms to a fluid reservoir, effectively removing gas while maintaining a compact device size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate defoaming device is added to remove gas from lubricating fluid, then gas removal effectiveness is improved, but device size increases
Solution Approach 1:
The patent combines the defoaming function with the existing discharge mechanism and gasket structure. The gasket's extending portion forms a flow path that guides lubricating fluid to discharge onto the gasket surface, where gas naturally separates and vents. This merges the defoaming function into existing structural components rather than adding a separate defoaming device, thus improving gas removal effectiveness while avoiding device size increase.
2Stress or pressure
If the pump suction capacity is increased to supply required working pressure, then working pressure supply is improved, but air suction along with lubricating fluid increases
Solution Approach 1:
The patent implements preliminary gas removal action before the lubricating fluid reaches the pump. The flow path guides the fluid to discharge onto the gasket surface where gas separates and vents through the extending portion structure. This preliminary defoaming prevents air from being suctioned into the pump, allowing the pump to operate at required working pressure without air contamination.
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 allows for efficient gas removal from lubricating fluids without increasing the device's size, ensuring sufficient working pressure and preventing foaming, thus addressing the limitations of conventional systems.
Implementation Method 1
a flow path configured to extend from an upper portion of the casing to a lower portion thereof and to guide the lubricating fluid discharged from the discharge mechanism to the fluid reservoir
Implementation Method 2
the discharged lubricating fluid flows and moves along an inner surface of the flow path
Implementation Method 3
Since the gas is discharged from the lubricating fluid during such movement, the flow path can obtain a sufficient defoaming effect
Implementation Method 4
the flow path can obtain a sufficient defoaming effect while having a simple constitution
Data Source
AI summary
Provided is a flow path structure of a power transmission device which is capable of removing gas from a lubricating fluid guided to a fluid reservoir while suppressing an increase in a size of the entire power transmission device. A gasket (63) has an extending portion which extends toward an inside of a transmission case (31). A flow path (70) which extends from an upper portion to a lower portion and guides lubricating oil discharged from a discharge mechanism (64) to an oil reservoir is formed inside the transmission case (31) using the extending portion. The discharge mechanism (64) discharges the lubricating oil toward an inner surface of the flow path (70).