Composite Mining Screen Resonance and Structural Integrity
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Solution Overview
Problem
Current mining screens face issues with resonance frequencies, mechanical instability, and frequent breakdowns due to their metallic construction, leading to operational inefficiencies and safety concerns, as they often operate near critical structural frequencies, causing vibrations and potential collapse.
Innovation Solution
A mining screen made from composite materials such as carbon fiber, glass fiber, or graphene, with a hydraulic system and variable aperture dimensions, allowing for adaptable vibration regimes and intelligent structure monitoring to prevent resonance and enhance mechanical strength and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If mining screens are constructed with metallic materials and welds, then structural strength is provided, but resonance frequencies are generated causing mechanical instability and frequent breakdowns
Solution Approach 1:
The patent applies composite materials (carbon fiber, glass fiber, or graphene combined with polymer matrices) to replace traditional metallic constructions. These composite materials provide the necessary structural strength while having different vibrational characteristics that operate beyond resonance frequencies, eliminating the mechanical instability and resonance issues inherent in metallic constructions with welds.
2Productivity
If mining screens operate at high vibration frequencies for material separation, then screening efficiency is improved, but the machine operates near critical structural frequencies causing excessive vibration and potential collapse
Solution Approach 1:
The patent changes the fundamental material parameter from metal to composite materials, which fundamentally alters the vibrational characteristics and natural frequencies of the screen structure. This parameter change allows the screen to operate at high vibration frequencies for efficient material separation while the composite structure's natural frequencies are shifted beyond the operating range, preventing resonance and structural failure.
3Strength
If traditional metallic screens with welds and fasteners are used, then initial structural integrity is achieved, but the components loosen quickly due to vibration affecting the whole screen structure
Solution Approach 1:
The patent uses composite materials that can be manufactured as integrated structures or bonded joints instead of mechanical fasteners and welds. This eliminates the loosening problem of bolts and nuts under vibration, and avoids the fatigue and resonance issues of welded metallic structures, thereby extending the operational lifespan of the screen.
4Ease of manufacture
If mining screens are designed with fixed configurations, then manufacturing is simplified, but reconfiguration in different operating scenarios takes days
Solution Approach 1:
The patent divides the screen into modular segments or panels made of composite materials that can be easily assembled and disassembled. This segmentation allows for quick reconfiguration in different operating scenarios while maintaining manufacturing simplicity through standardized composite components that can be pre-fabricated and then rapidly assembled using bonding techniques rather than complex welding or fastening operations.
Data Source
AI summary
It is described a mining screen (100) comprising at least one propulsion element (140) associated with a screening structure (165), wherein the mining screen (100) is able to carry out (develop) at least one vibration regime, thereby promoting the screening of a material moving through the screen (100), wherein the screen (100) is configured in such a way that at least one between the propulsion element (140) and the screening structure (165) are manufactured from a first material, the first material configured as a compound (composite) material. Furthermore, it is described as a screen panel (156) applied on a mining screen (100), a control method for mining screen as well as a mining system.