Heavy-Duty Shredder Rotor With Adjustable Teeth for Variable Feed Size
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Solution Overview
Problem
Existing heavy-duty shredders struggle to effectively process organic materials of varying sizes, particularly in forestry, resulting in unsatisfactory shredding outcomes.
Innovation Solution
A heavy-duty shredder design featuring a rotor with annular discoidal sectors and selectively mountable teeth, allowing for adjustable cutting depth and width, and a configuration that maintains rotor inertia, enabling efficient shredding of diverse material sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the rotor is designed with fixed deep teeth for processing large organic material, then the shredding effectiveness for large material is improved, but the rotor inertia increases excessively causing speed reduction
Solution Approach 1:
The rotor teeth are segmented into modular inserts that can be selectively mounted and removed. Each tooth consists of a base structure with replaceable cutting inserts, allowing the rotor to be configured with different tooth depths and arrangements depending on the material size being processed, thus reducing unnecessary inertia while maintaining shredding effectiveness
Solution Approach 2:
The rotor design transitions from fixed teeth to dynamically adjustable teeth through selective mounting of inserts. The tooth configuration can be changed based on operational requirements, enabling the rotor to adapt its inertia characteristics to match the specific shredding task at hand
2Speed
If the rotor is designed with shallow teeth to maintain low inertia and high speed, then the rotor speed is maintained, but the shredding effectiveness for large organic material is reduced
Solution Approach 1:
The rotor allows dynamic adjustment of tooth depth by selecting different insert configurations. When processing large material, deeper inserts can be mounted to increase shredding effectiveness without permanently increasing rotor inertia, as they can be removed or replaced when high speed is required
Solution Approach 2:
The effective tooth depth parameter can be changed by replacing inserts with different dimensions. This allows optimization of the tooth depth parameter according to the specific material being processed, balancing shredding effectiveness and rotor speed requirements
3Manufacturing precision
If the shredder is designed for specific material sizes, then the shredding precision is improved, but the versatility for processing varying material sizes is reduced
Solution Approach 1:
The rotor is designed as a universal platform that can process various material sizes by changing the tooth insert configuration. The same rotor structure can be adapted for small branches, medium logs, or large trunks by selecting appropriate insert depths, widths, and arrangements, eliminating the need for multiple specialized rotors
Solution Approach 2:
Multiple geometric parameters of the teeth (depth, width, spacing, angle) can be changed by replacing inserts with different specifications. This allows precise optimization of shredding parameters for each material size while using the same underlying rotor structure
Data Source
Figure 1~2
Figure 3~5
AI summary
A heavy-duty shredder (1), in particular for use in forestry, has a frame (2); a rotor (3), which is mounted on the frame (2) so that it can rotate about an axis of rotation (A1) and has a drum (11) coaxial with the axis of rotation (A1); a plurality of annular discoidal sectors (12) extending around the drum (3), integral with the drum (11) and distributed along the axis of rotation (A1) so as to form annular cavities between the adjacent annular discoidal sectors (12); a plurality of first teeth (13) integral with the drum (11) and arranged in the annular cavities between two adjacent annular discoidal sectors (12); and a plurality of second teeth (14) integral with the drum (11) and aligned with the annular discoidal sectors (12).