Screen Roller Radial Expansion Prevents Oversize Jamming
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing roller screens face issues with jamming of oversize fractions when conveyed axially, particularly in designs where screen rollers are supported on both sides, which can lead to clogging and stability problems.
Innovation Solution
The design incorporates screen rollers with radially protruding structures that widen axially, creating a narrower fine-grain screen gap and reducing the axial conveying effect, allowing oversize fractions to float and be conveyed transversely, thereby reducing jamming risks and enhancing stability by allowing support on both ends.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If screen rollers are supported on both sides to enhance stability, then structural stability is improved, but oversize fraction jamming increases
Solution Approach 1:
The screen roller body features a radial expansion section that locally increases the diameter in a specific axial region. This creates a localized narrowing of the screen gap between adjacent rollers, which prevents oversize fraction jamming at that specific location while maintaining the overall structural stability provided by bilateral roller support.
Solution Approach 2:
The invention changes the geometric parameter of the roller body by introducing a radial expansion section with increased diameter. This parameter change locally reduces the screen gap width between adjacent rollers, effectively preventing jamming of oversize material while allowing the rollers to be supported on both ends for enhanced stability.
2Reliability
If screen gap width is reduced to prevent jamming, then jamming risk is reduced, but fine fraction throughput may be affected
Solution Approach 1:
The radial expansion section is positioned at a specific location on the roller body, creating a localized narrow screen gap only in that region. Other sections of the roller maintain their original diameter and screen gap width, allowing fine fraction throughput to remain unaffected in those regions while jamming is prevented at the expansion section.
Solution Approach 2:
Instead of reducing the screen gap width along the entire roller circumference, the invention applies the gap reduction partially only in the radial expansion section. This partial action is sufficient to prevent jamming of oversize fraction without excessively impacting the overall fine fraction throughput capacity of the screening system.
3Ease of operation
If axial conveying effect is reduced to allow transverse conveyance, then oversize fraction discharge is improved, but conveying efficiency may decrease
Solution Approach 1:
The radial expansion section creates a localized region where the axial conveying effect is reduced due to the narrowed screen gap. This local modification allows oversize fraction to be conveyed transversely and discharged more easily at that specific location, while other sections of the roller screen maintain their normal axial conveying efficiency.
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 design effectively reduces the risk of jamming and enhances the stability and robustness of the screening device by ensuring oversize fractions are conveyed transversely, allowing for uninterrupted operation and easier discharge.
Implementation Method 1
the roller body (21; 31) of at least one of the screen rolls (20; 30) expands radially in an axial expansion section (25; 35) in the roller axis direction (X)
Implementation Method 2
allowing oversize fractions to float and be conveyed transversely
Data Source
Figure 1~3
Figure 4
Figure 5~6
AI summary
A screening device for sorting material into one or more fine fractions and one or more oversize fractions, the screening device comprising: (a) a frame (2, 3) and (b) a roller screen (1) with screen rollers (20; 30) arranged side by side and rotatably about a roller axis (R), supported on the frame (2, 3), preferably rotatably mounted on the frame (2, 3) at both axial ends, each having a roller body (21; 31) and one or more screen structures (22; 32) projecting radially relative to the roller body (21; 31), (c) wherein a fine fraction screen gap exists between the roller bodies (21; 31) of adjacent screen rollers (20; 30), through which a fine fraction falls, while when the screen rollers (20; 30) are rotated, an oversize fraction is formed on the roller screen (1) roller axial direction (X) is conveyed, characterized in that (d) the roller body (21; 31) of at least one of the screen rollers (20; 30) is in an axial expansion section (25;35) expands radially (e) in the direction of the roller axis (X) and the width (w) of the fine-grain screen gap formed by the expanding roller body (21; 31) with the roller body (21; 31) of an adjacent screen roller (20; 30) decreases along the expansion section (25; 35) in the direction of the roller axis (X).