Magnet-Strainer Offset for Hydraulic Foreign Matter Trapping
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Solution Overview
Problem
The oil in the oil pan contains a significant amount of foreign matter that is not effectively removed by existing filtration systems, leading to potential damage to the power transmission mechanism.
Innovation Solution
A power transmission device and hydraulic device configuration that includes a strainer with a suction port and a magnet positioned between the strainer and the bottom wall of the case, where the magnet and suction port are displaced from each other, allowing the magnet to trap foreign matter from the oil before it reaches the suction port.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter is provided inside the strainer to remove foreign matter, then the protection of the power transmission mechanism is improved, but the amount of foreign matter entering the strainer cannot be reduced at the source
Solution Approach 1:
The magnet is positioned upstream of the suction port to preliminarily trap foreign matter before the oil enters the strainer. This preliminary action prevents foreign matter from reaching the filter inside the strainer, reducing the load on the filter and improving overall system reliability.
Solution Approach 2:
The magnet acts as an intermediary component between the oil pan and the strainer. It captures foreign matter in the oil flow path before the oil reaches the suction port, serving as a preliminary filtration stage that protects the main filter system.
2Reliability
If the magnet is positioned directly below the suction port, then foreign matter trapping is maximized, but the magnet may interfere with the suction port operation and increase device complexity
Solution Approach 1:
The magnet and suction port are positioned asymmetrically relative to each other. The magnet is offset from the direct vertical path below the suction port, creating a displaced arrangement that prevents interference while maintaining effective foreign matter trapping in the oil flow path.
Solution Approach 2:
The magnetic field is concentrated in the region where oil flows from the oil pan toward the suction port. The magnet is positioned to create a localized magnetic trapping zone that intercepts foreign matter without physically blocking the suction port opening or requiring complex integration.
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 configuration significantly reduces the amount of foreign matter entering the strainer, thereby protecting the power transmission mechanism and ensuring smoother operation.
Implementation Method 1
a magnet disposed between the bottom wall portion and the strainer in the case
Data Source
AI summary
A power transmission device includes: a case that accommodates a power transmission mechanism; a strainer disposed to face a bottom wall portion in the case; a suction port for oil provided in a portion of the strainer facing the bottom wall portion; and a magnet disposed between the bottom wall portion and the strainer in the case. The magnet and the suction port are provided to be displaced from each other when viewed from a facing direction in which the strainer and the bottom wall portion face each other, and the suction port is provided with an opening facing a magnet side.