Oscillating Screen Eccentric Drive With Hydraulic Suspension
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Solution Overview
Problem
Existing oscillating screens face issues with maintaining optimum oscillation conditions due to high loads causing unwanted oscillations and rapid deterioration of shock absorber elements, leading to structural damage and high maintenance costs.
Innovation Solution
The use of two eccentric elements aligned along the center line of the screening container, coupled with hydraulic or oil-dynamic suspension means between supporting legs and the container, ensures synchronized rotational and oscillating movements without mechanical shocks, preventing unwanted vertical oscillations and reducing the need for elastomer-based shock absorbers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the screening container is made to oscillate at very high angular velocities, then the productivity of material separation is improved, but high loads cause unwanted oscillations and rapid deterioration of shock absorber elements
Solution Approach 1:
The patent introduces hydraulic or pneumatic shock absorber elements as intermediary components between the screening container and the fixed supporting structure. These intermediaries absorb and dampen the high loads and unwanted oscillations generated during high-velocity oscillation, protecting the structural integrity while allowing productive operation
Solution Approach 2:
The patent changes the physical state and properties of the shock absorber elements from rigid mechanical components to fluid-based hydraulic or pneumatic systems. This parameter change allows the shock absorbers to dynamically adapt to varying load conditions during high-speed oscillation, maintaining reliability across different operating parameters
2Productivity
If the screening container oscillates at high angular velocities, then the productivity is improved, but the shock absorber elements made of elastomer material deteriorate rapidly
Solution Approach 1:
The patent replaces the traditional mechanical elastomer-based shock absorber system with a hydraulic or pneumatic system. This substitution eliminates the wear and tear inherent in elastomer materials under high-frequency cyclic loading, dramatically extending the service life of shock absorber elements while maintaining high oscillation speeds for productivity
3Stability of the object's composition
If the eccentric element is disposed at the central zone of the screening container, then the oscillation is balanced, but unwanted oscillations occur on vertical planes
Solution Approach 1:
The patent positions hydraulic or pneumatic shock absorber elements at the corners of the screening container as intermediary damping components. These corner-mounted shock absorbers specifically counteract unwanted vertical oscillations (pitching and rolling) on the container, complementing the central eccentric element's balancing function and eliminating harmful vibrations
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 maintains optimal oscillation conditions, prevents structural damage, and reduces maintenance costs by using hydraulic or oil-dynamic shock-absorption, allowing the screening container to 'float' smoothly during motion without disturbing its trajectory.
Implementation Method 1
hydraulic or oil-dynamic suspension means between supporting legs and the container
Data Source
Figure 1~1b
Figure 2~3
AI summary
An oscillating screen (10) comprises a screening container (12) inside which a screening means is disposed lying on a determinate screening plane (P), coinciding or inclined with respect to a horizontal oscillation plane (X), and oscillation means (18, 26) to move the screening container (12) with respect to a fixed supporting structure (15). The oscillation means (18, 26) comprises a first movement unit (18) provided with a first rotary shaft (20) associated with a first eccentric element (24) cooperating with the screening container (12), and a second movement unit (26) having at least a second rotary shaft (40) provided with a second eccentric element (28) cooperating with the screening container (12). A transmission means (30) connects the first rotary shaft (20) and the second rotary shaft (40) with each other, so that they have the same angular velocity.