Segmented Conditioning Roller for Forage Harvester Crop Throughput
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current conditioning devices for forage harvesters face challenges in achieving high crop throughput while minimizing stress on rollers and bearings, leading to a short service life due to increased drive energy usage and load on components.
Innovation Solution
A conditioning device with multiple conditioning gaps, each defined by a pair of rollers, where at least one roller is axially divided into sections of varying effectiveness, and rollers in subsequent pairs are unarticulated for thorough breakdown, reducing drive energy consumption and stress on components by optimizing crop flow and distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the width of the conditioning device is increased to handle larger crop throughput, then the crop throughput is improved, but the body width of the forage harvester becomes too wide for public roads
Solution Approach 1:
The first roller is divided axially into multiple sections with different diameters (high-effectiveness and low-effectiveness sections), creating a segmented structure that allows varying conditioning intensity across different zones of the roller, enabling high throughput while maintaining compact overall dimensions
2Productivity
If the throughput of the conditioning device is increased while maintaining the same width, then the crop throughput is improved, but the stress on conditioning rollers and bearings increases significantly
Solution Approach 1:
The first roller is segmented into high-effectiveness and low-effectiveness sections along its axial direction, allowing crop to be distributed across different zones with varying conditioning intensity, which reduces the concentrated load on bearings while maintaining overall throughput
Solution Approach 2:
Different sections of the first roller have different diameters to provide locally adapted conditioning effectiveness - high-effectiveness sections with larger diameter for thorough conditioning and low-effectiveness sections with smaller diameter for reduced load, optimizing both throughput and bearing stress distribution
3Stress or pressure
If the drive energy used to compress harvested crop before it passes through the conditioning gap is reduced, then the load on rollers and bearings is decreased, but the crop breakdown effectiveness may be compromised
Solution Approach 1:
The segmented roller design with alternating high and low effectiveness sections allows crop to experience varying compression and conditioning forces, reducing the need for excessive drive energy while maintaining effective breakdown through the distribution of conditioning zones
Solution Approach 2:
The alternating pattern of high and low effectiveness sections creates a periodic action on the crop as it passes through the conditioning gap, with sections of varying diameter providing rhythmic compression and release that reduces overall energy requirements while maintaining breakdown effectiveness
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 enhances crop throughput and reduces bearing stress, extending the service life of rollers and bearings by efficiently managing crop flow and energy usage, allowing for a compact and effective conditioning system.
Implementation Method 1
the rollers of each pair are rotated in opposite directions... the first roller of at least one of the pairs runs through the conditioning gap defined by the pair counter to the conveying direction of the crop and the second roller runs through the same conditioning gap in the conveying direction of the crop
Data Source
Figure 1~4
Figure 2~3
Figure 5
AI summary
A first roller (8) of each first pair is slid in an axial direction into sections with high (23) and low (22) conditioning effectiveness. A first roller (10,8) of a second pair also slides into the same sections, which are each offset axially against each other with the same effectiveness. A second roller (9) of each pair is axially unarticulated.