Curved Cutting Edge Rollers for Homogeneous Comminution
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Solution Overview
Problem
Existing comminution devices struggle to achieve homogeneous comminution results while being cost-effective and adaptable to different raw materials, with complex manufacturing processes and inefficient cutting edge designs.
Innovation Solution
The comminution device employs counter-rotating rollers with obliquely angled circumferential grooves and ribs, featuring a cutting edge profile with curved paths along helical or conical spirals, allowing for adjustable cutting edge parameters such as angle, height, and unprocessed surface area, enhancing manufacturing simplicity and comminution efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional radial cutting edges are used, then manufacturing is simpler, but comminution homogeneity deteriorates
Solution Approach 1:
The patent applies curvature by transitioning from traditional radial cutting edges to helical cutting edges that follow a curved path around the roller axis. This curved geometry creates more uniform cutting conditions throughout the comminution gap, improving comminution homogeneity while the helical pattern can be efficiently manufactured using standard machining processes.
Solution Approach 2:
The invention moves the cutting edge design from a two-dimensional radial pattern to a three-dimensional helical pattern that wraps around the roller. This dimensional change allows the cutting edges to engage material more uniformly across the comminution gap, achieving better homogeneity without significantly increasing manufacturing complexity.
2Adaptability or versatility
If fixed cutting edge geometry is used, then manufacturing is simpler, but adaptability to different materials deteriorates
Solution Approach 1:
The patent enables material adaptability by allowing adjustment of helical cutting edge parameters including pitch, diameter, lead angle, and depth. These parameter changes permit optimization for different materials and comminution requirements while maintaining the same basic helical geometry concept, avoiding the need for completely different design families.
Solution Approach 2:
The helical cutting edge design serves multiple functions: it provides cutting action, creates uniform comminution conditions, and can be adapted to different materials through parameter adjustment. This multi-functional design reduces the need for multiple specialized roller types while maintaining versatility across applications.
3Productivity
If oblique flank angles are used, then comminution efficiency is improved, but manufacturing precision requirements worsen
Solution Approach 1:
The helical cutting edges with oblique flanks are formed following a curved path that naturally creates the desired oblique angles. The curved geometry distributes the angular requirements across a three-dimensional form, making it more manufacturable while maintaining the efficiency benefits of oblique flank angles for material engagement and comminution.
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
This design achieves improved comminution results with reduced particle size variation, adaptable to various materials, and simplified manufacturing, optimizing throughput and processing intensity based on specific applications.
Implementation Method 1
The flanks are provided with a cutting edge profile comprising multiple cutting edges and grooves... which ensures an increased shear effect between the flanks
Implementation Method 2
at least two counter-rotating comminution rollers... creating a comminution gap between two adjacent flanks
Data Source
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AI summary
A comminution device for comminuting material particles, in particular grain or fiber particles, is proposed, comprising at least two counter-clockwise driven comminution rollers, each having a longitudinal axis (L) and an alternating sequence of circumferential grooves and ribs on its respective outer surface, the flanks of which extend at an angle ≠ 90° to the longitudinal axes of the rollers, wherein at least one engagement pair consisting of a circumferential rib of one roller and a circumferential groove of the other roller is formed between the comminution rollers, such that a comminution gap is formed between two adjacent flanks, the device being characterized in that the flanks are provided with a cutting edge profile (12) having a plurality of cutting edges (13) and grooves (14), the cutting edges (13) of which have a curved profile along a curved line (K).in particular a helix or a conical spiral extending from the longitudinal axis (L) of the roller in question along a flank surface to a circumferential edge (15) of the crushing roller in question.