Elastic Plastic Dam Roller Flank Elements for Soil Adhesion
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Solution Overview
Problem
In cohesive soils, the caking of soil on ridge rolls leads to uneven ridges during formation, causing different growth conditions for plants, and existing solutions like regular cleaning or using scrapers increase rolling resistance and risk of stone entrapment, which can damage the dam roller and supporting structure.
Innovation Solution
The dam roller part is designed with at least partially elastic plastic flank elements that reduce soil adhesion and allow stones to be rolled over without damage, featuring a Shore hardness of 85 to 100 for rigidity and flexibility, and a support structure made from elastic plastic for cost-effective production and enhanced adjustability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If regular cleaning is performed to remove soil buildup, then ridge uniformity is improved, but rolling resistance increases and operation becomes more complex
Solution Approach 1:
The patent changes the material parameter of the flank elements from rigid to elastic, with specific hardness values (Shore A 85-100, Shore D 50-90) and elasticity moduli (60-2000 MPa). This parameter change allows the elements to naturally shed soil through elastic deformation during rotation, eliminating the need for regular cleaning operations while maintaining ridge uniformity.
Solution Approach 2:
The elastic flank elements perform self-cleaning through their own elastic deformation during rotation. The material properties enable automatic soil release without external cleaning mechanisms, operators, or additional components, making the system self-maintaining and reducing operational complexity.
2Object-generated harmful factors
If scrapers are used to clean the ridge roller, then soil buildup is reduced, but rolling resistance increases and stone entrapment risk increases
Solution Approach 1:
The patent converts the previously harmful effect of soil adhesion into a beneficial self-cleaning mechanism. The elastic deformation of the flank elements creates natural soil release, transforming the cleaning function from a harmful operation (requiring scrapers) into a beneficial automatic process. This eliminates stone entrapment risks while maintaining soil buildup control.
Solution Approach 2:
The patent extracts the cleaning function from separate mechanical components (scrapers) and integrates it into the fundamental material property of the flank elements themselves. The elastic material inherently performs the cleaning function through deformation, removing the need for additional cleaning mechanisms and eliminating associated stone entrapment hazards.
3Strength
If the roller weight is increased to improve ridge formation, then shaping capability is improved, but excessive compaction of the dam occurs
Solution Approach 1:
The patent uses composite material construction with elastic plastic flank elements (polyurethane, POM, PP, or PK) combined with a support structure. This composite approach provides sufficient shaping capability through the rigid support structure while the elastic outer layer reduces compaction forces on the substrate, achieving both shaping strength and reduced harmful compaction effects.
Solution Approach 2:
The patent applies different material properties to different parts of the roller: the support structure provides rigid shaping capability where needed, while the elastic flank elements provide flexible, low-compaction contact with the substrate. This local differentiation of material quality allows the roller to exert force where necessary for shaping while minimizing compaction harm where it contacts the ground.
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 elastic design prevents soil adhesion, reduces rolling resistance, and minimizes the risk of stone damage, while allowing for adjustable width settings and flexible operation, thereby improving ridge formation uniformity and reducing operational costs.
Implementation Method 1
at least one and preferably all flank forming elements are at least partially made of elastic plastic. The flank forming elements are thus at least partially and, in particular, completely elastic. After a change in shape caused by a sufficiently large force, they return to their original shape.
Data Source
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AI summary
The present invention relates to a dam roller component for forming a dam flank, comprising a plurality of flank forming elements (22) arranged circumferentially around a longitudinal central axis (16) and held by an internal support structure, which extend radially outwards from the longitudinal central axis (16) in the direction of the longitudinal central axis (16), and of which at least one and preferably all flank forming elements (22) are at least partially made of elastic plastic. The invention further relates to a dam roller and a laying machine.