Magnetic Impeller Coupling for Tool-Less Mixer Replacement
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Solution Overview
Problem
Current impeller connection systems for mixing devices are complex, requiring specialized tools and small parts for replacement, and often necessitate removal of the entire mechanism, which is inefficient and prone to contamination.
Innovation Solution
A quick-connect and rotation system using diametrically magnetized members for impeller coupling, allowing for tool-less installation and removal, with magnetic or mechanical torque transmission to secure the impeller in place, and a Hall Effect sensor to monitor impeller presence and velocity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional impeller connection systems are used, then the impeller can be securely attached to the motor shaft, but the replacement process becomes complex requiring specialized tools and small parts
Solution Approach 1:
The connection system is segmented into distinct magnetic components: a first magnetically polarized member on the motor shaft and a second magnetically polarized member on the impeller. This segmentation allows each component to be independently designed and replaced, simplifying the overall system while enabling tool-less operation through magnetic attraction between the separated components.
Solution Approach 2:
Traditional mechanical fastening systems (screws, clips, specialized tools) are replaced with a magnetic coupling system. The magnetic force between the two magnetically polarized members provides secure attachment without requiring mechanical fasteners or specialized tools, dramatically simplifying impeller replacement while maintaining secure connection during operation.
2Productivity
If traditional impeller connection systems are used, then the impeller can be securely attached, but the entire mechanism must be removed for impeller replacement
Solution Approach 1:
The connection system is segmented into distinct magnetic components: a first magnetically polarized member on the motor shaft and a second magnetically polarized member on the impeller. This segmentation allows each component to be independently designed and replaced, simplifying the overall system while enabling tool-less operation through magnetic attraction between the separated components.
Solution Approach 2:
The impeller is extracted as an independently replaceable component with its own magnetic member. This allows the impeller to be removed and replaced without extracting the motor shaft or other mechanism components, significantly improving replacement speed and reducing the complexity of the replacement process.
3Reliability
If frequent impeller replacement is performed, then contamination can be prevented, but downtime increases due to complex replacement procedures
Solution Approach 1:
Traditional mechanical fastening systems (screws, clips, specialized tools) are replaced with a magnetic coupling system. The magnetic force between the two magnetically polarized members provides secure attachment without requiring mechanical fasteners or specialized tools, dramatically simplifying impeller replacement while maintaining secure connection during operation.
Solution Approach 2:
The magnetic coupling system is designed to be self-servicing during replacement. The magnetic attraction automatically guides and secures the impeller to the motor shaft during attachment, and the same magnetic force must simply be overcome (e.g., by pulling or using a simple tool) during removal, eliminating the need for complex tool sequences and reducing replacement time while maintaining reliability.
4Ease of operation
If magnetic coupling is used for impeller attachment, then tool-less operation is achieved, but torque transmission must be maintained
Solution Approach 1:
The magnetic members are pre-configured with specific polarizations and positioning features that automatically align the impeller with the motor shaft during attachment. This preliminary alignment ensures that the magnetic force is optimally oriented to transmit torque efficiently from the motor shaft to the impeller, maintaining adequate torque transmission while enabling tool-less operation.
Solution Approach 2:
The magnetic coupling system replicates the functional characteristics of traditional mechanical connections (secure attachment and torque transmission) using magnetic fields instead of mechanical contact. The magnetic force between the two magnetically polarized members creates a coupling that transmits torque effectively while allowing for easy separation, copying the essential functions of mechanical fastening without the complexity of mechanical parts.
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
Enables easy and efficient impeller replacement, reduces contamination risk, and minimizes downtime by allowing user-friendly tool-less operation and automatic monitoring of mixing speed, ensuring accurate chemical results.
Implementation Method 1
the motor imparts rotational torque, via a magnetic field between the first member and the second member, on the first attachment end when the first attachment end and the second attachment end are connected
Implementation Method 2
a Hall Effect sensor to monitor impeller presence and velocity
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
One embodiment provides a quick-connect and rotation system for impeller coupling including: an impeller comprising: a mixer end; and a first attachment end; the first attachment end comprising a first member that is diametrically magnetized; and an motor comprising: a rotational shaft with a second attachment end comprising a second member that is diametrically magnetized; wherein the first attachment end and the second attachment end are complementary to each other; and wherein the motor imparts rotational torque, via a magnetic field between the first member and the second member, on the first attachment end when the first attachment end and the second attachment end are connected.