Magnet Module Jacket for Nuclear Magnetic Flow Meter
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Solution Overview
Problem
The introduction of strong magnet modules into nuclear magnetic flow meters is hindered by significant forces causing peeling of the magnet material, which affects the homogeneity of the magnetic field and measurement quality.
Innovation Solution
A magnet module with a protective jacket made of low-brittleness materials like viscoelastic plastics or metals, which reduces friction and prevents peeling, and includes spacers and strips for improved magnetic field shaping and mechanical stability, allowing easier assembly and maintaining field homogeneity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If strong magnet modules are used to generate high magnetic field strength, then the induced voltage and measurement sensitivity are improved, but the magnetic field homogeneity deteriorates due to peeling of magnet material
Solution Approach 1:
A non-magnetic intermediary layer (jacket) is introduced between the magnet module and the magnet receiver. This jacket prevents direct contact and eliminates the peeling effect while allowing the strong magnetic field to pass through unchanged, thus maintaining both high magnetic field strength and field homogeneity
Solution Approach 2:
The non-magnetic jacket serves as a protective cushion that is applied beforehand to the magnet module. This cushioning layer prevents the harmful peeling effect from occurring during insertion, thereby preserving the integrity and homogeneity of the magnetic field
2Volume of moving object
If magnet modules are introduced tightly to one another to maximize space utilization, then the device compactness is improved, but the ease of operation deteriorates due to difficult insertion caused by magnetic forces
Solution Approach 1:
The non-magnetic jacket acts as a mediator that reduces friction and magnetic attraction forces during insertion. This allows magnet modules to be introduced easily even when tightly arranged, maintaining device compactness while improving ease of operation
Solution Approach 2:
The jacket changes the friction parameter between the magnet module and magnet receiver by introducing a non-magnetic material interface. This parameter change reduces the insertion force required while maintaining the tight spatial arrangement of magnet modules
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
Simplifies the introduction of magnet modules, reduces peeling, and enhances the stability and homogeneity of the magnetic field, enabling more reliable and efficient measurement of fluid compositions, particularly for crude oil proportions less than 5%.
Implementation Method 1
measuring and evaluating the voltage induced by nuclear magnetic resonance of the multiphase fluid into a suitable sensor. The measurement principle of nuclear magnetic resonance is based on the property of atomic nuclei with a free magnetic moment to precess to the nuclear spin in the presence of a magnetic field.
Implementation Method 2
The precession of a vector representing the magnetic moment of an atomic nucleus takes place around a vector representing the magnetic field in place of the atomic nucleus. The precession induces a voltage into the sensor. The frequency of the precession is called the Larmor frequency ωL and is computed according to ωL=γ·B
Data Source
AI summary
A magnet module for a nuclear magnetic flow meter including at least one permanent magnet and a jacket. The jacket protects the at least one permanent magnet against peeling of magnet material by mechanical loads when the magnet module is introduced into a magnet receiver of the flow meter, simplifies introduction of the permanent magnets into the magnet receivers by reduced friction between the magnet module and the magnet receivers, and influences the magnetic field which generated by the permanent magnets.