Two-Stage Straw Processing Implement for Flax and Hemp

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Solution Overview

Problem

Conventional straw choppers used in combine harvesters are not optimally suited for flax and hemp crops, leading to harsh conditions for the equipment and reduced lifespan or increased service frequency.

Innovation Solution

A towable agricultural implement featuring a two-stage straw-processing system, including a first rotor with teeth and a second rotor with flailing knives, designed to collect, pulverize, and disperse windrowed straw back into the field.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a conventional straw chopper is used on flax and hemp straw, then the straw can be chopped into smaller particulate, but the equipment wear increases and lifespan decreases

Engineering Contradiction:

Improvestraw chopping capabilityVSAvoidequipment lifespan

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The straw processing system is divided into two distinct stages: a first stage using a rotor with teeth for initial chopping, and a second stage using a rotor with flailing knives for final pulverization. This segmentation allows each stage to be optimized for its specific function, reducing the harshness on equipment while maintaining effective straw processing capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention changes the operational parameters by using a two-stage processing system with different cutting mechanisms. The first stage uses teeth for coarse chopping, and the second stage uses flailing knives for fine pulverization. This parameter change in the processing method reduces equipment wear while maintaining productivity.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If a conventional straw chopper is used on flax and hemp straw, then the straw can be processed, but service frequency must be increased

Engineering Contradiction:

Improvestraw processing capabilityVSAvoidservice frequency

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

By segmenting the processing into two stages with specialized components, the system reduces the operational stress on individual components. The first stage handles bulk material removal while the second stage completes the pulverization, reducing the frequency at which components need servicing while maintaining continuous processing capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The two-stage system provides a form of cushioning by distributing the mechanical stress across two processing stages rather than one harsh stage. The first stage prepares the straw for the second stage, reducing the overall impact on equipment and reducing the need for frequent servicing.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Reliability

If a two-stage processing system is implemented, then equipment wear is reduced, but device complexity increases

Engineering Contradiction:

Improveequipment lifespanVSAvoidprocessing system structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The two processing stages are merged into a single integrated implement structure that can be towed behind a tractor. Both rotors and their respective cutting elements work together in one cohesive system, reducing the complexity that would arise from having separate machines while maintaining the benefits of two-stage processing.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The implement is designed as a universal system that can process different types of straw (flax, hemp, and other cereal crops) through its two-stage processing mechanism. This multi-functionality justifies the added complexity by providing reliable performance across multiple crop types and reducing the need for multiple specialized machines.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 implement effectively pulverizes straw into fine particulate, reducing equipment wear and extending its lifespan, while ensuring efficient dispersion back into the field.

Implementation Method 1

a first rotor with teeth and a second rotor with flailing knives, designed to collect, pulverize, and disperse windrowed straw

Methodology Applied

Scientific EffectMechanical Force: Mechanical Force

Implementation Method 2

a first rotor with teeth and a second rotor with flailing knives, designed to collect, pulverize, and disperse windrowed straw

Methodology Applied

Scientific EffectMechanical Force: Mechanical Force

Data Source

PatentUS12262660B2Agricultural implement for field-collection, pulverization and field-dispersement of flax or hemp straw

Publication Date: 2025.04.01 FAZAKAS GEORGE

AI summary

An agricultural implement for collecting, pulverizing and dispersing straw that has been windrowed during a harvesting operation. A frame carries a pickup mechanism at a front end thereof, and first and second straw-processing stages therebehind, and each featuring a rotor and accompanying concave having static teeth fixed thereon. The first rotor likewise has fixed teeth, and the second rotor has flailing knives, whereby the straw is gradually broken down in the two sequential stages before discharge back into the field.