Magnetic Drawer Separator Inversion for Ferrous Removal
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Solution Overview
Problem
Existing magnetic separators compromise magnetic strength at the outer surface due to the need for thicker non-magnetic quills to provide structural support, which reduces their ability to attract and release ferrous contaminants effectively.
Innovation Solution
The configuration is reversed with non-magnetic stems slidably received within hollow bored magnetic quills, allowing direct magnetic attraction at the outer surface with minimal alteration in magnetic strength, and annular wipers assist in tramp iron release, utilizing non-magnetic materials like stainless steel for structural support and tramp iron release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If thicker non-magnetic quills are used to provide structural support, then structural strength is improved, but magnetic attraction strength at the outer surface deteriorates
Solution Approach 1:
The patent inverts the traditional quill-and-stem configuration by placing non-magnetic stems inside magnetic quills instead of magnetic stems inside non-magnetic quills. This inversion allows the magnetic material to be at the outer surface where it directly contacts ferrous contaminants, maximizing magnetic attraction strength while the inner non-magnetic stem provides structural support.
Solution Approach 2:
The patent applies different material properties to different locations: magnetic material (such as ferrite or rare earth magnets) is placed at the outer surface of the quills where magnetic attraction is needed, while non-magnetic material (such as stainless steel) is used for the inner stems where structural support is needed. This local differentiation of material quality resolves the contradiction between structural strength and magnetic attraction.
2Strength
If non-magnetic quills are used to house magnetic stems, then structural support is provided, but magnetic strength at the outer surface is compromised
Solution Approach 1:
The patent reverses the conventional arrangement by making the quill magnetic and the stem non-magnetic. This allows the magnetic quill to directly attract ferrous contaminants at its outer surface, while the non-magnetic stem inside provides the necessary structural support without interfering with the magnetic field.
3Ease of operation
If magnetic stems are withdrawn for tramp iron release, then ferrous debris can be released, but structural support during operation is reduced
Solution Approach 1:
By inverting the configuration to have non-magnetic stems inside magnetic quills, the patent allows the magnetic quills to remain structurally intact and magnetically active during operation, while the non-magnetic stems can be easily withdrawn for tramp iron release without compromising the structural integrity of the magnetic assembly.
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 maintains magnetic strength while effectively attracting and releasing ferrous contaminants, ensuring efficient removal without compromising the magnetic field, and the non-magnetic stems facilitate easy release of tramp iron.
Implementation Method 1
ferrous contaminants magnetically adhere to the magnetic cartridges and are thereby removed from the materials stream
Implementation Method 2
the quills have wall thicknesses which are sufficient for structural support of the interior magnetic stem components
Implementation Method 3
the stem components comprise series of permanent magnets which are housed and slidably supported within the non-magnetic quills
Data Source
AI summary
A magnetic drawer separator incorporating at least a first permanent magnet series having a longitudinal, oppositely longitudinal, and outer ends, each permanent magnet having an opening; a longitudinally extending hollow bore within the at least first permanent magnet series, the bore being formed by the permanent magnets' openings; at least a first shaft having longitudinal and oppositely longitudinal ends, the longitudinal end of the at least first shaft engaging the at least first permanent magnet series within the bore; at least a first wiper engaging the outer end of the at least first permanent magnet series; and a frame having longitudinal and oppositely longitudinal ends, wherein the at least first wiper is fixedly attached to the frame's longitudinal end, and wherein the at least first shaft is fixedly attached to the frame's oppositely longitudinal end.