Crop Compression Rollers for Combine Header Flow
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Solution Overview
Problem
Existing draper platform headers for agricultural combines face issues with crop accumulation between the cutter bar and rear sheets, particularly with crops like rape, which conventional top augers struggle to manage due to speed mismatch with lateral belt conveyors, disrupting the crop flow.
Innovation Solution
The implementation of rotationally drivable crop compression rollers above the lateral belt conveyors, with a smooth cylindrical surface and adjustable position, to compress and clear crop accumulations without requiring synchronization with the belt conveyor speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If top augers are used to remove crop accumulations, then crop flow is improved, but the auger flights disrupt the flow of crop material when speed is not closely matched to the lateral belt conveyors
Solution Approach 1:
The invention changes the fundamental operating parameter from speed-synchronized auger rotation to speed-independent roller compression. The compression rollers operate at speeds unrelated to the lateral belt conveyors, eliminating the speed matching requirement while still achieving effective crop material movement and preventing accumulations.
Solution Approach 2:
The invention extracts the speed synchronization requirement from the system by replacing the auger mechanism with compression rollers. This removes the problematic coupling between auger speed and conveyor speed, allowing independent operation of each component while maintaining effective crop flow.
2Ease of operation
If auger speed is closely matched to lateral belt conveyor speed, then flow disruption is reduced, but the system becomes more complex and less adaptable to varying operating conditions
Solution Approach 1:
The invention extracts and removes the speed synchronization mechanism entirely from the system. The compression rollers operate independently without any speed matching requirements, simplifying the control system and reducing mechanical complexity while maintaining continuous crop flow.
Solution Approach 2:
The invention segments the crop handling function into two independent components: lateral belt conveyors for primary transport and compression rollers for accumulation prevention. Each component operates autonomously without requiring coordinated speed control, simplifying the overall system architecture.
3Productivity
If top augers are used to engage crop material, then accumulations are removed, but the system is highly dependent on the feeding speed of lateral belt conveyors
Solution Approach 1:
The invention fundamentally changes the operational parameter from speed-dependent auger rotation to speed-independent roller compression. The compression rollers effectively remove accumulations regardless of the lateral belt conveyor speed, providing adaptability to varying operating conditions.
Solution Approach 2:
The compression rollers perform the accumulation removal function independently without relying on the speed characteristics of the lateral belt conveyors. Each component serves itself autonomously, with the rollers continuously preventing accumulations regardless of conveyor feeding variations.
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
Effectively prevents crop accumulation above the lateral belt conveyors, ensuring uninterrupted crop flow to the central conveyor, regardless of the belt conveyor speed, thereby enhancing the lateral crop feeding process.
Implementation Method 1
Rotationally drivable left and right crop compression rollers are supported on the frame forward of the back sheets and above the left and right lateral belt conveyors. The crop compression rollers extend substantially over the length of the left and right lateral belt conveyors and have a laterally extending rotational axis and a smooth cylindrical surface with a circular cross section.
Data Source
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AI summary
A header (20) for an agricultural combine (10) comprises a laterally extending frame (28) supporting a laterally extending cutter bar (54) and left and right lateral belt conveyors (32, 34) supported on the frame (28). Each of the belt conveyors (32, 34) has a feeding direction from an outer side end towards a center of the header (20). Rotationally drivable left and right crop compression rollers (74) are supported on the frame (28) above the left and right lateral belt conveyors (32, 34). The crop compression rollers (74) extend substantially over the length of the left and right lateral belt conveyors (32, 34) and have a smooth cylindrical surface.