Washing Machine Magnetic Vibration Reduction Using Ring Magnet Pairs
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Solution Overview
Problem
Pulsator washing machines experience significant vibration and noise due to eccentricity during the washing process, which existing suspension systems fail to effectively mitigate.
Innovation Solution
The implementation of magnet pairs with outer and inner ring-shaped magnets arranged between the inner and outer drums, along with a rotating mechanism and damping-adjustable suspension rods containing magneto-rheological fluid, to reduce radial vibrations and noise through magnetic forces and adjustable damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If suspension rods are used to suspend the outer drum, then the structure provides mechanical support and stability, but the vibration and noise during operation remain significant and the damping effect is insufficient
Solution Approach 1:
The patent replaces the traditional purely mechanical suspension rod system with a magnetic field-based vibration reduction mechanism. Ring magnets are installed on the inner drum and correspondingly on the outer drum, creating magnetic attraction forces that actively counteract radial vibrations during rotation, thereby substituting passive mechanical damping with active magnetic field control.
Solution Approach 2:
The patent changes the physical state and interaction parameters by introducing magnetic fields between the inner and outer drums. The magnetic force parameters (strength, distribution, and polarity arrangement) are optimized to dynamically counteract vibration frequencies, transforming the system from static mechanical support to dynamic magnetic field interaction for vibration control.
2Object-affected harmful factors
If multiple suspension rods are installed to reduce vibration, then the structural support is enhanced, but the device complexity increases and the damping effect remains insufficient
Solution Approach 1:
The patent replaces complex mechanical suspension systems with a simpler magnetic field-based solution. Instead of adding more mechanical components like suspension rods and dampers, the invention uses ring magnets arranged in specific patterns on the inner and outer drums, creating a less complex system that achieves better vibration control through magnetic field interactions.
Solution Approach 2:
The patent combines different functional elements into a composite vibration control system: permanent magnets (providing magnetic field), non-magnetic spacers (maintaining air gaps), and the interaction between inner drum magnets and outer drum magnets. This composite approach creates a multifunctional system that reduces vibration without requiring complex mechanical structures.
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 solution effectively reduces vibration and noise by buffering radial vibrations with magnetic forces and adjustable damping, prolonging the service life of components and enhancing user experience.
Implementation Method 1
reduce the magnitude of a radial vibration of the inner drum or the outer drum by means of a magnetic force between the outer ring-shaped magnet and the inner ring-shaped magnet
Implementation Method 2
damping-adjustable suspension rods containing magneto-rheological fluid, to reduce radial vibrations and noise through magnetic forces and adjustable damping
Data Source
AI summary
A washing machine comprises: an outer drum; an inner drum rotatably disposed in the outer drum; and a rotation mechanism for driving the inner drum to rotate. A rotation shaft of the rotation mechanism extends upwardly from the bottom of the outer drum to a bottom wall of the inner drum to drive the inner drum to rotate. The washing machine further comprises: at least one pair of magnets including an outer ring-shaped magnet and an inner ring-shaped magnet which is disposed at a radial inner side of the outer ring-shaped magnet and opposite to the outer ring-shaped magnet. The inner ring-shaped magnet is disposed on the rotation shaft, and the outer ring-shaped magnet is disposed at the bottom wall of the inner drum or the outer drum, so that a magnetic force between them can reduce a magnitude of vibration of the inner drum or the outer drum.