Vibrating Screen Raised Portions for Material Stratification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vibrating screen systems for crushed stone and gravel lack elements to reduce material travel speed and stir/mix the material for improved screening efficiency, leading to suboptimal fractionation and increased wear on screening holes.
Innovation Solution
A cross-tensioned or longitudinally tensioned screening media with raised portions arranged transversely to the travel direction, featuring a combination of polymeric materials and reinforcing wires, designed to stir and mix the material effectively while maintaining flexibility and attachment to the screen walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a flat screening deck is used, then the structure is simple and easy to manufacture, but the material travel speed cannot be reduced and screening efficiency is poor
Solution Approach 1:
The screening deck is segmented into multiple functional zones along the material travel direction: a feeding zone with first raised portions for initial stratification, a screening zone with second raised portions for enhanced screening, and a discharge zone. This segmentation allows different sections to perform specific functions that collectively improve screening efficiency while maintaining a relatively simple overall structure.
Solution Approach 2:
Raised portions are provided on the screening deck surface, creating a curved or elevated geometry rather than a completely flat surface. These raised portions stratify the material layer, reduce material travel speed, and improve contact between material particles and the screening surface, thereby enhancing screening efficiency without requiring a completely complex three-dimensional structure.
2Productivity
If raised portions are added to the screening deck, then material travel speed is reduced and screening is improved, but the device complexity increases
Solution Approach 1:
Raised portions are strategically positioned in specific zones rather than uniformly distributed across the entire screening deck. The first raised portions are located in the feeding zone to handle initial material distribution, while second raised portions are placed in the screening zone for enhanced screening. This localized approach improves screening efficiency where needed while minimizing overall structural complexity.
3Ease of manufacture
If the screening deck structure is simplified, then manufacturing is easier, but wear on screening holes increases
Solution Approach 1:
The raised portions are designed to perform preliminary stratification of the material layer before the material reaches the screening holes. By pre-separating material into different size fractions and reducing travel speed in advance, the raised portions reduce the impact force and wear on the screening holes, thereby extending their service life while maintaining a relatively simple deck structure.
Data Source
AI summary
A screening arrangement in a vibrating screen for screening of material, such as crushed stone, gravel or the like. The screening arrangement is a cross-tensioned or longitudinally tensioned screening media including elements arranged on top of the screening media for stirring or mixing the screened material, the stirring elements being raised portions, which are arranged transversely to the travel direction of the screened material.