Kinked Axis Multiple Roll Crusher Design
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Solution Overview
Problem
Existing multiple roll crushers face challenges in crushing mineral materials like coal without compaction, achieving high throughput in a compact space, and minimizing mechanical wear.
Innovation Solution
A multiple roll crusher design with at least three rolls, where neighboring rolls rotate in opposite directions and have a kinked axis connection, allowing for a reduced crusher space width while maintaining throughput and minimizing wear, with adjustable cutting teeth and an anvil ledge for efficient material processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the crusher space width is reduced to achieve compact design, then the device occupies less space, but the throughput rate decreases
Solution Approach 1:
The patent introduces a kink in the connecting line of rotation axes, changing the spatial arrangement from a straight line to a bent configuration. This dimensional reorganization allows the crusher rolls to be positioned more efficiently within the width constraint while maintaining adequate working gaps for material throughput.
Solution Approach 2:
The patent employs adjustable working gaps between crusher rolls, allowing the gap dimensions to be dynamically modified based on material characteristics and desired throughput. This adjustability enables optimization of the balance between compact width and processing capacity.
2Productivity
If more crusher rolls are arranged in parallel to increase throughput, then the productivity increases, but the crusher space width increases
Solution Approach 1:
By introducing the kink in the axis connecting line, the patent enables a more compact arrangement of multiple parallel crusher rolls. The bent configuration allows rolls to be positioned closer together in the width direction while maintaining sufficient working gaps, thus accommodating more rolls within the same width constraint.
Solution Approach 2:
The kinked arrangement creates a nested-like configuration where crusher rolls are positioned in a folded pattern, effectively utilizing the three-dimensional space within the crusher housing to maximize the number of rolls without proportionally increasing the width.
3Area of stationary object
If the distance between rotation axes is reduced to compact the design, then the crusher space width is reduced, but the material flow and throughput are affected
Solution Approach 1:
The patent employs adjustable working gaps that can be modified based on material characteristics and desired throughput. This adjustability enables optimization of the balance between compact width and processing capacity, allowing the system to maintain adequate material flow paths even with reduced axis distances.
Solution Approach 2:
The kink in the connecting line creates different local configurations at different positions along the crusher rolls. This allows the working gaps to be optimized locally for material flow while maintaining overall compact dimensions, with the bend providing additional space for material passage in critical areas.
4Reliability
If crusher rolls with cutting teeth are used to reduce mechanical wear, then the wear and tear is minimized, but the device complexity increases
Solution Approach 1:
The patent employs cutting teeth with asymmetric profiles optimized for shearing action. The teeth are arranged with different heights and angles on opposite sides of the roll, creating an asymmetric configuration that enhances cutting efficiency and reduces wear while maintaining relatively simple overall structure.
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
The design achieves high throughput with minimal mechanical wear and efficient crushing without compaction, allowing for flexible adjustment of grain size and accommodating various materials.
Implementation Method 1
crushing procedure being executed between the crushing rolls and the walls of the crusher casing
Implementation Method 2
crushing procedure being executed between two rolls with cutting elements arranged at the circumference on helical lines
Data Source
AI summary
A multiple roll crusher is provided for crushing of mineral material, more particularly of coal or oil sand. The multiple roll crusher includes at least three crusher rolls (1, 2, 5 1′, 2′), the rotation axes (R) of which lie in parallel to each other and horizontal or roughly horizontal. All directly neighboring crusher rolls (1, 2, 1′, 2′) have opposite directions of rotation. A connecting line (V) of the rotation axes (R) has at least one kink.