Washing Machine Balancer Channel Structure for Unbalanced Drum Loads
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Solution Overview
Problem
Washing machines experience vibration and noise due to unbalanced loads during drum rotation, which can lead to damage to components like the drum and motor, as laundry is not evenly distributed, causing eccentric rotation.
Innovation Solution
A balancer system with a housing having an annular channel and movable masses, where grooves and cross-section increasing portions restrict mass movement within specific RPM ranges, utilizing magnetic forces and damping fluid to stabilize the drum's rotation and offset unbalanced loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If laundry is concentrated at a particular part in the drum without being evenly distributed, then the drum rotates, but vibration and noise are generated and components may be damaged
Solution Approach 1:
The balancer uses movable masses positioned in grooves to create counterbalancing forces that offset the unbalanced load caused by concentrated laundry. The masses move along curved channels to dynamically counteract the eccentric rotation, reducing vibration and noise while maintaining drum rotation stability.
Solution Approach 2:
The balancer employs movable masses that can dynamically reposition themselves along curved channels in response to changing load conditions. The grooves constrain the masses to follow specific trajectories, allowing the system to adapt to varying laundry distributions and maintain balance during drum rotation.
2Reliability
If a balancer is added to offset unbalanced load, then drum rotation is stabilized, but device complexity increases
Solution Approach 1:
The balancer is divided into modular components including a housing, multiple movable masses, curved channels, and grooves. This segmentation allows for easier manufacturing, assembly, and maintenance while achieving the complex function of dynamic load balancing through coordinated interaction of simpler individual 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
The balancer effectively stabilizes the drum's rotation, reduces vibration and noise, and prevents damage by efficiently offsetting unbalanced loads during both low and high-speed operations, ensuring even laundry distribution and prolonged component lifespan.
Implementation Method 1
utilizing magnetic forces and damping fluid to stabilize the drum's rotation
Implementation Method 2
a damping fluid accommodated in the channel such that the damping fluid applies resistance to the masses when force acts on the masses
Data Source
AI summary
A washing machine includes a cabinet, a drum rotatably arranged within the cabinet, an annular recess provided in the drum, and a balancer to offset an unbalanced load caused within the drum during rotation of the drum. The balancer includes a balancer housing mounted to the recess and has an annular channel therein, at least one mass movably disposed in the channel, and at least one ball disposed between the balancer housing and the mass to generate rolling motion.