Magnetic Filter With Spiral Coil Separator
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Solution Overview
Problem
Existing magnetic filters for fuel and hydraulic systems are inefficient in removing fine metallic impurities, particularly in limited spaces, and often require external power supply.
Innovation Solution
A compact magnetic filter with a spiral coil separator and a magnet in the center, which slows down the liquid flow to enhance magnetic force capture of metallic impurities without external power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a paper filter is used in fuel systems, then solid particles and sediments are removed, but metallic shavings pass through due to their small size and cutting ability
Solution Approach 1:
The patent replaces the mechanical paper filter with a magnetic field-based separation system. The magnetic filter uses magnetic fields to attract and capture metallic shavings and particles from the fuel stream, eliminating the mechanical limitation of paper filters that allow metallic particles to pass through due to their small size and cutting ability.
Solution Approach 2:
The patent changes the filtering mechanism from mechanical (paper) to magnetic field-based. By altering the physical parameter of the filtering medium from a physical barrier (paper) to a magnetic field, the system can effectively capture metallic impurities that would otherwise pass through the paper filter.
2Reliability
If existing magnetic filters are used, then metallic particles are captured, but they require large installation space and external power supply
Solution Approach 1:
The patent employs a self-service magnetic filter design where the magnetic field is generated internally by permanent magnets or electromagnets integrated into the filter housing. This eliminates the need for external power supply and large installation space, as the magnetic field generation is contained within the compact filter structure itself.
Solution Approach 2:
The patent integrates the magnetic field generation components within the compact filter housing, creating a nested structure where the magnetic elements are contained inside the filter body. This allows the magnetic filtering function to be achieved in a compact form factor without requiring external power supply or large installation space.
3Productivity
If liquid flow is not slowed down, then filtering efficiency is reduced, but slowing down flow requires additional components
Solution Approach 1:
The patent uses curved or spiral flow paths within the filter housing to naturally slow down the liquid flow. The curved geometry of the internal channels creates turbulence and reduces flow velocity, enhancing the magnetic field's ability to capture metallic particles without requiring additional flow control components.
Solution Approach 2:
The patent extends the flow path in a dimensional sense by using spiral or multi-pass internal channels. This increases the residence time of the liquid in the magnetic field without significantly increasing the external dimensions of the filter, thereby enhancing filtering efficiency without adding complexity.
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
The filter achieves high efficiency in capturing metallic impurities, including fine shavings, in limited spaces without the need for external power, thus preventing damage to fuel and hydraulic system components.
Implementation Method 1
magnetic filter with a spiral coil separator and a magnet in the center, which slows down the liquid flow to enhance magnetic force capture of metallic impurities
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
A magnetic filter consisting of an external case, a separator, and a magnet is designed to have the separator (6) fitted in its internal case with at least one spiral coil (7), where in the centre of the separator (6), the site (8) of the magnet containing the magnet (9) is situated. The spiral coil (7) may have its surface roughened by indenting.