Vibratory Apparatus Dynamic Balancer Counterweight
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Solution Overview
Problem
Direct drive vibratory screening units in mining operations dampen under increased loading, leading to reduced processing efficiency, premature failure, and increased maintenance costs due to energy being directed into side panels, as they struggle to handle higher processing demands without compromising performance.
Innovation Solution
A two-mass, sub-resonant frequency vibratory apparatus with a dynamic balancer, where the trough and exciter move 180 degrees out of phase, supported by isolation springs and coupled to the ground through resilient members, reduces dynamic forces applied to the foundation and surrounding structures, allowing for larger units to operate efficiently with lower power requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If direct drive vibratory screening units are increased in size to handle higher processing demands, then processing capacity is improved, but power requirements increase and the units dampen under load
Solution Approach 1:
The patent applies counterweight principles by using a balance mass that moves in opposition to the exciter mass. This balance mass generates counteracting forces that offset the dynamic forces produced by the exciter, thereby reducing the net force transmitted to the foundation and allowing larger units to operate with reduced power requirements
2Productivity
If direct drive vibratory screening units are increased in size to handle higher processing demands, then processing capacity is improved, but stroke decreases due to dampening under load
Solution Approach 1:
The balance mass system compensates for the dampening effect by providing counteracting forces that maintain the exciter's motion amplitude. This allows the unit to preserve its stroke even when handling increased material loads, as the counterweight offsets the additional inertial forces that would otherwise reduce vibration amplitude
3Productivity
If direct drive vibratory screening units operate under increased loading, then processing capacity is improved, but energy is directed through the drive bracket into the side panels causing premature failure
Solution Approach 1:
The patent extracts or isolates the harmful dynamic forces from the structural components by introducing a separate balance mass system. The counterweight generates forces that cancel out the exciter's dynamic loads before they can be transmitted through the drive bracket to the side panels, thereby protecting these components from premature failure while maintaining high processing capacity
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 solution enhances processing capacity and reduces energy transmission to the environment, enabling larger screens to operate effectively with reduced maintenance and operational costs by maintaining stroke and efficiency under increased loading conditions.
Implementation Method 1
a dynamic balancer including a plurality of resilient members disposed between the exciter and ground
Implementation Method 2
a first plurality of isolation springs disposed between the trough and ground
Implementation Method 3
a two-mass, sub-resonant frequency exciter supported on the trough. The trough and the exciter move 180-degrees out of phase with each other
Data Source
Figure 1
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AI summary
A vibratory apparatus including a trough having one or more decks, with an inlet end and an outlet end, a first plurality of isolation springs disposed between the trough and ground, and a two-mass, sub-resonant frequency exciter supported on the trough. The trough and the exciter move 180-degrees out of phase with each other. The apparatus also includes a dynamic balancer including a plurality of isolation springs disposed between the exciter and ground.