Sugarcane Harvester Extractor Leaf Shredder
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Solution Overview
Problem
Sugarcane harvesters face inefficiencies in separating leaves from billets due to incomplete removal by basecutters and primary extractors, leading to leaves being transported along with billets, which complicates the discharge process and reduces operational efficiency.
Innovation Solution
An extractor for sugarcane harvesters is designed with a fan and a leaf shredder coupled to a rotatable hub, where the fan induces air flow to separate leaves and the shredding blades cut leaves before ejection, ensuring complete separation from billets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If only basecutters and primary extractors are used, then the device complexity is low, but the leaf separation completeness is insufficient
Solution Approach 1:
The patent combines the fan and leaf shredder into a single integrated extractor assembly that rotates together on a common hub. This merging of components achieves more complete leaf separation (improving manufacturing precision) while avoiding the complexity of separate independent systems (controlling device complexity). The shredding blades are mounted on the same rotational mechanism as the fan, creating a unified leaf removal system.
Solution Approach 2:
The leaf separation function is divided into two distinct mechanisms: the fan creates airflow to lift and separate leaves from billets, while the shredding blades physically cut and shred leaves into smaller pieces. This segmentation of the leaf removal process into aerodynamic separation followed by mechanical shredding achieves more complete separation without requiring entirely separate systems, as both functions are integrated into one extractor assembly.
2Productivity
If leaves are not completely separated, then the discharge process is simpler, but operational efficiency is reduced
Solution Approach 1:
The leaf shredder performs preliminary action by shredding leaves into smaller pieces before they reach the discharge point. This preliminary shredding prevents whole leaves from contaminating the billet discharge, thereby improving operational efficiency without complicating the discharge process. The leaves are broken down in advance during the extraction phase, so no additional processing is needed at discharge.
3Manufacturing precision
If a leaf shredder is added to the extractor, then leaf separation completeness is improved, but the device complexity increases
Solution Approach 1:
The patent merges the leaf shredder functionality into the existing extractor assembly by mounting shredding blades on the extractor hub alongside the fan. This integration achieves improved leaf separation completeness while minimizing the increase in device complexity, as the shredder shares the rotational mechanism and space with the fan rather than requiring a completely separate drive system.
Solution Approach 2:
The extractor hub serves multiple functions: it rotates the fan to create separating airflow, rotates the shredding blades to cut leaves, and potentially supports other attachments. This multi-functionality allows the addition of leaf shredding capability without proportionally increasing device complexity, as the same rotational mechanism performs multiple leaf removal tasks.
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 solution effectively separates leaves from billets, enhancing the discharge process efficiency by ensuring cleaner billets and reducing operational complexities, thereby improving the overall harvesting process.
Implementation Method 1
The fan comprises fan blades to induce a flow of air to separate leaves from billets
Data Source
AI summary
An extractor for a sugarcane harvester that chops stalks of sugarcane into billets. The extractor comprises a fan, a leaf shredder, and a hub. The fan comprises fan blades to induce a flow of air to separate leaves from billets. The leaf shredder comprises shredding blades to cut leaves prior to their ejection from the extractor. The hub is rotatably driven about an axis of rotation. The fan blades and the cutting blades are coupled to the hub for rotation together with the hub about the axis of rotation.