Roller Crusher Flange Cleaning With PCD Cutter Elements
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Solution Overview
Problem
Roller crushers with flanges experience excessive stress and wear at the flange and edge areas, leading to build-up material accumulation, which requires frequent manual removal, reducing efficiency and increasing maintenance downtime.
Innovation Solution
A roller crusher with a rotatable cutter unit having polycrystalline diamond (PCD) impact surfaces and a material removal device that efficiently cuts away build-up material on the flange and roller ends, utilizing a rotatable cutter unit with multiple cutter elements to increase wear resistance and reduce stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If flanges are attached to roller ends to maintain crushing pressure, then crushing effectiveness is improved, but stress and wear at flange areas increase leading to material build-up
Solution Approach 1:
The material removal device with rotatable cutter unit is positioned to preemptively remove build-up material before it accumulates to problematic levels. The cutters engage the flange surface continuously or periodically to prevent excessive material accumulation that would otherwise require shutdown for manual removal.
Solution Approach 2:
The roller crusher performs self-maintenance through the integrated material removal device that automatically removes build-up material from the flanges during operation. This eliminates the need for external manual intervention and keeps the crushing surfaces clean and effective.
2Productivity
If manual removal of build-up material is performed frequently, then crushing efficiency is maintained, but operational downtime increases
Solution Approach 1:
The material removal device operates continuously or periodically without requiring shutdown of the roller crusher. The rotatable cutter unit removes build-up material in real-time during crushing operations, ensuring continuous productive action without interruption for manual maintenance.
Solution Approach 2:
The system performs its own maintenance function through the automated material removal device, eliminating the need for external manual intervention and associated downtime. The crusher maintains itself during normal operation.
3Reliability
If polycrystalline diamond (PCD) impact surfaces are used on cutter elements, then wear resistance is improved, but device complexity increases
Solution Approach 1:
The cutter elements use polycrystalline diamond (PCD) impact surfaces, which are composite material structures providing exceptional wear resistance. The PCD is bonded to the cutter element substrate, creating a composite structure that combines the toughness of the base material with the extreme hardness and wear resistance of the diamond surface layer.
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 solution significantly prolongs the wear life of the cutter elements, enhances material removal efficiency, reduces maintenance downtime, and maintains consistent crushing pressure across the length of the rollers, thereby increasing the crusher's operational efficiency and capacity.
Implementation Method 1
a rotatable cutter unit having a plurality of cutter elements arranged tangentially about the rotatable cutter unit at a respective radial distance from a rotational axis of the rotatable cutter unit; and a rotation device arranged to rotate the rotatable cutter unit, wherein the rotatable cutter unit is arranged at an end of a roller having a flange and thereby, when being rotated by the rotation device, at least partially allow cutting away material accumulated on the flange and/or on the envelope surface
Implementation Method 2
each of the cutter elements of the plurality of cutter elements presents an impact surface arranged to face the material to be cut away, and wherein each of the impact surfaces comprises a polycrystalline diamond (PCD)
Data Source
AI summary
A roller crusher having two parallel rollers that rotate in opposite directions and are separated by a gap. At least one of the rollers has a flange at an end thereof. The roller crusher includes a material removal device having a rotatable cutter unit with a plurality of cutter elements arranged tangentially about the rotatable cutter unit at a radial distance from a rotational axis for the rotatable cutter unit. A rotation device rotates the rotatable cutter unit at an end of a roller having a flange. When the cutter unit is rotated by the rotation device, the cutter unit at least partially cuts away material accumulated on the flange and/or on the envelope surface at an end portion of the roller adjacent the flange. Each cutter elements presents an impact surface that faces the material to be cut away and is a polycrystalline diamond (PCD).