Pivoting Counter-Comb and Sieve Layout for Overload-Resistant Shredding
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Solution Overview
Problem
Existing comminution devices face issues with feed material wedging between the counter-comb and shredding roller, leading to rotational failure, overload, and wear, and are unable to achieve defined particle size separation or effectively shred elongated materials.
Innovation Solution
A comminution device with a pivotably mounted counter-comb and a screening unit supported by the machine frame, featuring adjustable sieve openings and a pivoting mechanism to manage load peaks, allowing for defined particle size separation and efficient shredding of feed materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the counter-comb is rigidly mounted on the machine frame, then the structural stability is improved, but feed material becomes wedged in the gaps between counter-shredding tools and shredding tools, preventing the shredding roller from rotating and causing overload
Solution Approach 1:
The counter-comb is changed from a rigid mounting to a pivotable mounting on the machine frame, allowing it to dynamically adjust its position. This enables the counter-comb to move in response to wedging forces, preventing the shredding roller from stopping and avoiding overload conditions while maintaining operational reliability.
2Reliability
If the counter-comb is pivotably mounted on the machine frame, then overload situations are reduced, but the sieve gap or sieve openings cannot limit the particle size separation size to defined values
Solution Approach 1:
The screen element is divided into multiple individual sieve openings arranged in a pattern. These discrete openings provide defined particle size separation limits while being mounted on the pivotable counter-comb, allowing both precise particle size control and overload protection.
3Stability of the object's composition
If the screen basket is mounted independently of the counter-comb on the machine frame, then the structural stability is improved, but the feed material becomes wedged in the area of the counter-comb, preventing the shredding roller from rotating
Solution Approach 1:
The screen basket is merged with the counter-comb assembly, allowing them to move together as a unit. This integration ensures that the screen basket remains properly positioned relative to the counter-comb during operation, preventing feed material wedging while maintaining structural stability through their combined pivotable mounting.
Data Source
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AI summary
The invention relates to a comminution device (1) designed for comminution of feed material, comprising a comminution roller (5) rotatably mounted on a machine frame (4) and having comminution tools (3) on its outer surface (2), a counter comb (7) having counter comminution tools (6) for cooperating with the comminution tools (3) for comminution of the feed material, and a sieve device (9) arranged below the comminution roller (5) having a plurality of sieve openings (8) for sieving comminution of comminution, wherein the counter comb (7) is pivotably mounted on the machine frame (4), in particular on a first side wall (10) of the machine frame (4), and can be adjusted in the direction of the comminution roller (5) by means of an adjusting device (11), wherein the sieve device (9) is mounted on the counter comb (7) and wherein the sieve device (9) is attached to the machine frame (4),in particular, one of the further side walls (12) of the machine frame (4) opposite the first side wall (10), supports it, at least in the event of overload, and in particular, abuts it.