Eccentric Rotor Flow Path for Accurate Magnetic Concentration Measurement
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Solution Overview
Problem
Existing magnetic material concentration measuring devices face installation restrictions and accuracy issues due to the conversion of rotating motion into reciprocating motion of the piston, which complicates fluid replacement and affects measurement accuracy.
Innovation Solution
A magnetic material concentration measuring device with a bobbin and rotor configuration that includes eccentric holes and cutout parts, utilizing a transfer drive mechanism to circulate fluid through flow passages while rotating, eliminating the need for a reciprocating motion conversion mechanism and enhancing measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a mechanism that converts rotating motion into reciprocating motion of the piston is used, then the fluid can be guided into/out of the flow passage, but there are many restrictions in the installation of the magnetic material concentration measuring device
Solution Approach 1:
The patent removes the reciprocating motion conversion mechanism from the system. Instead of converting rotating motion to reciprocating motion, the invention directly uses rotating motion to drive the rotor, which guides fluid through flow passages formed by cutout parts. This extraction of the conversion mechanism eliminates installation restrictions while maintaining fluid guidance capability.
Solution Approach 2:
Rather than converting rotating motion into reciprocating motion (the conventional approach), the invention inverts the approach by directly utilizing rotating motion to achieve fluid guidance. The rotor rotation itself creates the flow passages through cutout parts, eliminating the need for reciprocating motion conversion and thereby increasing installation flexibility.
2Productivity
If the fluid is guided into/out of the flow passage by the reciprocating motion of the piston, then the fluid can be circulated, but replacement of the fluid is difficult and this may influence the accuracy of a measurement value
Solution Approach 1:
The patent implements continuous unidirectional fluid circulation through rotating flow passages. The rotor rotation continuously guides fluid through the flow passages formed by cutout parts in a consistent direction, enabling smooth fluid replacement without the intermittent action of reciprocating motion. This continuous circulation maintains measurement accuracy while achieving fluid circulation.
3Ease of operation
If a mechanism that converts rotating motion into reciprocating motion is used, then the fluid can be guided, but the device complexity increases due to additional components
Solution Approach 1:
The invention extracts and removes the reciprocating motion conversion mechanism from the system. The rotor directly uses rotating motion to guide fluid through flow passages, eliminating intermediate conversion components. This reduction in mechanism complexity simplifies the overall device structure while maintaining fluid guidance functionality.
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 device increases installation flexibility and improves measurement accuracy by allowing fluid circulation in one direction, reducing installation restrictions and ensuring smooth fluid replacement.
Implementation Method 1
exciting coils to which alternating voltage is applied, the exciting coils being provided on an outer circumference of a flow passage through which a fluid containing a magnetic material flows; an output coil from which an alternating voltage signal is output, the output coil being provided in proximity to the exciting coils
Implementation Method 2
an eccentric hole that is eccentrically formed so as to penetrate in an axis line direction of the bobbin; a rotor that is rotatably fitted in the eccentric hole about an eccentric axis line; a first cutout part that forms a first flow passage on one end side in an eccentric axis line direction of the rotor; a second cutout part that forms a second flow passage whose angle is shifted in a rotor rotation direction with respect to the first cutout part
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
Provided is a magnetic material concentration measuring device including: a bobbin 400 having an outer circumference around which an exciting coil 300, an output coil 301, and an exciting coil 302 are wound; an eccentric hole 410 formed in the bobbin 400; a rotor 600 that is rotatably fitted in the eccentric hole 410 about an eccentric axis line O; a first cutout part 610 that forms a first flow passage 411 on one end side in an eccentric axis line O direction of the rotor 600; a second cutout part 620 that forms a second flow passage 412 whose angle is shifted in a rotor 600 rotation direction with respect to the first cutout part 610, on another end side in the eccentric axis line O direction of the rotor 600; and a communication passage 413 that connects the first flow passage 411 and the second flow passage 412.