Rotary Drum Magnet Layout for Low-Cost Magnetic Separation
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Solution Overview
Problem
Existing drum type separation apparatuses face challenges in reducing apparatus costs while maintaining the capacity to transport magnetic bodies from coolant liquids, as the magnet configuration affects the efficiency and cost-effectiveness.
Innovation Solution
The apparatus employs a rotary drum with a magnet arrangement where the magnetic force below the liquid surface is stronger than above, using multiple groups of permanent magnets with varying thicknesses and orientations to optimize magnetic force distribution, allowing efficient transportation and collection of magnetic bodies while minimizing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the magnetic force is increased throughout the entire rotary drum to maintain transport capacity, then the magnetic bodies can be effectively transported, but the apparatus cost increases due to more magnets and higher material usage
Solution Approach 1:
The patent applies local quality by creating different magnetic force conditions in different regions of the rotary drum. The liquid immersion region has stronger magnetic force (with magnets disposed closer to the outer peripheral surface) to ensure effective separation, while the non-immersion region has weaker magnetic force (with magnets disposed farther from the outer peripheral surface) to reduce costs. This localized differentiation maintains transport capacity where needed while reducing material usage where full magnetic force is not required.
Solution Approach 2:
The patent segments the rotary drum into two distinct regions: a liquid immersion region and a non-immersion region. Each region has different magnet configurations optimized for its specific function. The liquid immersion region uses stronger magnetic fields for effective separation, while the non-immersion region uses weaker fields for cost reduction, allowing the system to achieve overall efficiency without uniform high-cost configuration throughout.
2Ease of manufacture
If the magnetic force is reduced to lower apparatus costs, then material usage decreases, but the transport capacity of magnetic bodies may be compromised
Solution Approach 1:
The patent ensures that the liquid immersion region maintains strong magnetic force through optimized magnet placement (closer to the outer peripheral surface), guaranteeing effective separation and transport capacity. The non-immersion region uses reduced magnetic force (magnets farther from the surface) only where full strength is not needed, thus reducing costs without compromising the critical separation function.
3Reliability
If magnets are disposed closer to the outer peripheral surface to increase magnetic force, then separation efficiency improves, but the apparatus cost and material usage increase
Solution Approach 1:
The patent applies local quality by positioning magnets closer to the outer peripheral surface specifically in the liquid immersion region where separation efficiency is critical, while positioning magnets farther from the surface in the non-immersion region where full magnetic force is not required. This localized optimization achieves reliable separation where needed while reducing material usage and costs in other regions.
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 the capacity to transport magnetic bodies efficiently while reducing apparatus costs by optimizing magnetic force distribution, preventing accumulation and detachment of magnetic bodies, and minimizing material usage.
Implementation Method 1
a magnet that is disposed on an inner side of the rotary drum... a configuration in which a magnetic force on a side lower than the liquid surface from an intersection position where the rotary drum and the liquid surface intersect each other is larger than a magnetic force on a side higher than the liquid surface from the intersection position
Data Source
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AI summary
With a drum type separation apparatus (1), apparatus cost reduction is achieved while a capacity of transporting a magnetic body (k) in a liquid is maintained. The drum type separation apparatus (1) includes a liquid passage (10) that allows the liquid mixed with the magnetic body to pass therethrough, a rotary drum (20) that is disposed such that a part of the rotary drum (20) is exposed above a liquid surface (L0) in the liquid passage (10) and transports the magnetic body (k) adsorbed on an outer peripheral surface as the rotary drum (20) rotates, and a magnet (30) disposed on an inner side of the rotary drum (20). A configuration where a magnetic force on a side lower than the liquid surface (L0) from an intersection position (P0) where the rotary drum (20) and the liquid surface (L0) intersect each other is larger than a magnetic force on a side higher than the liquid surface (L0) from the intersection position (P0).