Segmented Wear Roller for Crushing Particulate Material
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Solution Overview
Problem
Existing grinding rollers in the cement and minerals industries require frequent replacement due to excessive wear, leading to time-consuming and costly maintenance processes, inefficient grinding, and operational downtime, with previous segmented designs experiencing pressure build-up and non-uniform wear patterns that result in further losses.
Innovation Solution
A roller design featuring a roller body with individual wear segments arranged on longitudinal guiding means, allowing two or more segments to be fixed to the same lateral section, using grooves, knobs, keyways, and projections to secure and prevent movement, enabling easy replacement of worn segments and maintaining uniform wear across the roller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If grinding rollers are replaced frequently to address excessive wear, then roller performance is maintained, but operational downtime and labor costs increase
Solution Approach 1:
The roller is divided into multiple independent wear segments that can be replaced individually. Each segment is mounted on longitudinal guiding means and secured with clamps, allowing selective replacement of only the worn portions rather than the entire roller, thus reducing operational downtime and maintenance costs while maintaining roller performance.
2Duration of action of stationary object
If segmented wear segments are used to reduce replacement frequency, then roller durability improves, but pressure build-up between segments causes segment movement and damage
Solution Approach 1:
Longitudinal guiding means are provided on the roller body between the clamps to preliminarily constrain the wear segments before operation begins. These guiding means prevent segment movement by providing longitudinal guidance and restriction, eliminating the pressure build-up issue that would otherwise cause segment displacement and damage during operation.
3Duration of action of stationary object
If wear segments are arranged laterally on the roller body, then replacement frequency is reduced, but non-uniform wear pattern results in energy loss
Solution Approach 1:
The wear segments are designed with different properties along their length, with the outer half of each segment having different wear characteristics than the inner half. This local quality differentiation ensures uniform wear distribution across the roller surface, preventing energy loss from non-uniform wear while maintaining the benefits of segmented design for reduced replacement frequency.
4Reliability
If exotic high-end wear materials are used throughout the entire roller, then wear resistance improves, but manufacturing cost increases
Solution Approach 1:
Exotic high-end wear materials are applied only to the outer half of each wear segment where wear occurs, rather than throughout the entire roller. The inner half can be made from more economical materials, significantly reducing manufacturing costs while maintaining superior wear resistance in the critical areas where the roller contacts grinding media and particulate material.
Data Source
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AI summary
Described is a roller (1) for crushing of particulate material, such as crude ore for use in the mineral industry, where the roller body (2) is provided with a plurality of individual wear segments (4, 5) which are arranged on longitudinal guiding means (6) and between clamps (7, 8) in a manner such that two or more of the wear segments (4, 5) are fixed to the same lateral section of one lateral portion of the roller body (2) and such that the frequency of, and cost associated with, the replacement of such wear segments is minimized. The invention also relates to the plurality of wear segments and to a method of manufacturing the roller.