Vibrating Screen Frame Composite Side Walls
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Solution Overview
Problem
Vibrating screens face challenges in increasing frame strength without significantly increasing weight, leading to complex and costly structures, and existing solutions fail to efficiently manage dynamic stresses and heat-related issues during manufacturing.
Innovation Solution
The vibrating screen design incorporates a peripheral border region with interconnected elongate webs and reinforcing members, featuring apertures that define a predetermined pattern to enhance stiffness and strength while minimizing weight, using bolted connections instead of welding to avoid stress hot spots and facilitate assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the frame is constructed with heavier materials or thicker plates to withstand dynamic stresses, then the strength and stiffness of the frame is improved, but the weight of the frame increases significantly
Solution Approach 1:
The side walls are constructed as composite structures combining multiple materials: an outer steel plate for strength, a polyurethane foam core for lightweight insulation, and an inner steel plate for structural integrity. This composite approach achieves the required strength while minimizing weight compared to solid steel construction
Solution Approach 2:
The intermediate member features a non-uniform structure with strategically placed reinforcing ribs and varying thickness regions. The foam core is confined to specific areas between reinforcing members, providing local strength enhancement where needed while maintaining weight reduction in other areas
2Strength
If the frame thickness is increased to reduce stress and distortion, then the strength is improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The side walls are divided into modular components: outer steel plates, intermediate foam members with integrated reinforcing ribs, and inner steel plates. These segmented components are manufactured separately and assembled together, simplifying the manufacturing process compared to creating complex monolithic thick structures
Solution Approach 2:
The composite construction with foam core and reinforcing ribs provides structural strength equivalent to much thicker solid plates, but with simpler manufacturing since the foam can be injected or bonded into pre-formed configurations rather than requiring complex metal forming operations
3Strength
If welding is used to assemble frame components, then the structural integrity is improved, but heat-related problems such as stress hot spots and manufacturing difficulties occur
Solution Approach 1:
The patent replaces thermal joining (welding) with mechanical fastening methods such as bolts, screws, or rivets to assemble the composite side wall components. This substitution eliminates heat-related problems including stress hot spots, distortion, and material property changes while maintaining structural integrity through properly designed mechanical connections
Data Source
Figure 1~3
Figure 4~6
Figure 7A~7D
AI summary
A vibrating screen comprising a frame upon which is mounted a deck (12) having a plurality of apertures therein, said frame being mounted on a base and being provided with vibration generating means (20, 22) for imparting vibration to said deck (12), wherein said frame comprises pair of substantially parallel side walls (14, 16) between which the screen is mounted, each side wall comprising a pair of spaced apart side members (30, 32) defining outer faces of the side wall, at least one intermediate member (34) being located between said side members (30, 32), said at least one intermediate member (34) incorporating a plurality of apertures and/or cut-outs (36) therethrough.