Counterweight Stacker Idler Pulley Stability
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Solution Overview
Problem
Radial stackers face limitations in height and stability due to centrally disposed engine weight, leading to restricted conveyor angle and material accumulation issues with conventional counterweight solutions.
Innovation Solution
A counterweight box filled with heavy material is positioned rearwardly above the idler pulley, allowing steeper conveyor angles and improved stability without obstructing access to the pulley or creating debris accumulation surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a concrete-filled box is positioned under the conveyor belt to shift the center of gravity rearward, then the conveyor angle can be increased and stack height improved, but access to the return idler pulley is restricted and material accumulates on the box surface causing belt wear
Solution Approach 1:
The counterweight is repositioned from a horizontal location (under the conveyor) to a vertical location (above the idler pulley), changing the spatial dimension of weight distribution. This vertical placement achieves the same center of gravity shift while eliminating interference with idler pulley access and removing surfaces for material accumulation
2Length of moving object
If the conveyor angle is increased to form higher stacks, then stack height is improved, but the front end stability is compromised without additional rearward weight
Solution Approach 1:
A dedicated counterweight component is introduced above the idler pulley to provide rearward balancing force. This counterweight compensates for the forward tipping moment created by steep conveyor angles, enabling higher stack formation while maintaining front end stability
3Quantity of substance
If material adheres to the conveyor belt and falls onto a broad horizontal surface, then material accumulation occurs, but clearing the material is difficult and belt wear increases
Solution Approach 1:
The counterweight surface orientation is changed from horizontal (broad top surface) to vertical (side-facing), eliminating the horizontal accumulation surface. Material that would have fallen onto a horizontal surface now has no horizontal surface to collect on, preventing pile-up and subsequent belt wear
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
Enables higher stack formation and enhanced stability during operation and transport by shifting the center of gravity rearward and minimizing material accumulation on the counterweight, thus preventing belt wear.
Implementation Method 1
A counterweight box filled with heavy material is positioned rearwardly above the idler pulley, allowing steeper conveyor angles and improved stability
Data Source
AI summary
A stacking system for conveying bulk material includes a conveyor frame designed to support a conveyor belt, the conveyor frame including forward and rear portions, a hopper designed to receive the bulk material, the hopper being mounted adjacent the rear portion of the conveyor frame, an engine for providing power to the stacking system, a drive pulley for driving the belt, and an idler pulley disposed generally below the hopper. An improvement comprises a counterweight disposed above the idler pulley and to the rear of the hopper. Another way to describe the disclosure is as a counterweight for a belt-type, portable stacking conveyor having forward and rearward portions, a drive pulley disposed toward the forward portion of the conveyor and an idler pulley disposed adjacent the rearward portion of the conveyor, the counterweight being disposed immediately above the idler pulley.