Crushing Roll Axial Groove Form-Interlock Design
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Solution Overview
Problem
Existing roll-type crushers face issues with high assembly costs, jamming, and increased wear due to complex and unstable mounting of crushing shells, which complicates replacement and maintenance.
Innovation Solution
A crushing roll design featuring a shaft with axial grooves for form-interlocking engagement of crushing shells, allowing for secure and economical attachment and individual replacement, utilizing formed elements and adjusting bolts to transmit forces and prevent movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If crushing shells are directly anchored in shaft grooves (EP 0110665 A2), then attachment stability is improved, but wear increases and maintenance costs rise
Solution Approach 1:
The patent introduces formed elements as intermediary components between the shaft and crushing shells. These formed elements are anchored in shaft grooves and provide attachment points for crushing shells, distributing mechanical stresses and reducing direct wear on the crushing shells while maintaining stable attachment.
2Strength
If form-interlocking engagement is used (EP 0110665 A2), then force accommodation is improved, but replacement complexity increases
Solution Approach 1:
The patent segments the attachment system into three independent components: the shaft with grooves, the formed elements that fit into the grooves, and the crushing shells that attach to the formed elements. This segmentation allows crushing shells to be replaced independently without removing other components, reducing replacement complexity while maintaining form-interlocking strength.
3Ease of operation
If multiple attachment components are used (US 2004/0251360 A1), then individual replacement is enabled, but assembly costs increase
Solution Approach 1:
The formed elements serve multiple functions: they are anchored in the shaft grooves to provide stable attachment, they enable individual replacement of crushing shells, and they distribute mechanical loads. This multi-functionality reduces the need for additional specialized components, lowering assembly costs while enabling individual replacement.
Data Source
AI summary
The present invention relates to a crushing roll for a roll-type crusher has a shaft with at least one groove extending in the axial direction on its lateral surface, to receive formed elements. The formed elements serve to retain the crushing shells, for which purpose the formed elements form a form-interlockingly engaging combination with the groove in the shaft, in the radial direction. A "form-interlockingly engaging combination in the radial direction" is understood here to signify means of blocking of movement of the formed elements in the radial direction of the shaft. In this way, it is possible to anchor the crushing shells in the grooves by means of the formed elements. Advantageously, also axial forces from the crushing shells can be transmitted to the shaft via the formed elements in the grooves, which forces can thereby be borne by the shaft, given that a high pressing force can be transmitted via the combination of a crushing shell and formed element, resulting in high holding friction between the molded element and the shaft.