Self-adaptive Stalk Throwing Device for Axial Flow Harvesters
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Solution Overview
Problem
Existing combine harvesters face challenges in efficiently shredding and evenly dispersing stalks due to limited discharging space and inadequate distribution, particularly with high feed volumes, leading to unsatisfactory crushing and scattering performance.
Innovation Solution
A self-adaptive throwing device for stalks cutting and discharging in longitudinal axial flow combine harvesters, equipped with a stalks remnant shredding device, wind direction and speed detection, reaping region identification, operating speed sensor, shredding revolution speed sensor, and a width adjustable throwing device, controlled by a real-time adaptive system to optimize throwing width and distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traditional fixed blade structure is used for stalks crushing, then the structure is simple, but the crushing efficiency is low and stalks wind on the blade
Solution Approach 1:
The patent employs a flexible blade structure that can dynamically adjust its position and angle during operation. The blade is designed with elastic deformation capabilities, allowing it to adapt to varying stalk conditions and maintain optimal crushing contact, thereby improving crushing efficiency while avoiding the complexity of multiple fixed blade configurations.
Solution Approach 2:
The blade structure parameters such as angle, position, and shape are made variable rather than fixed. The blade can change its geometric parameters in response to operating conditions, enabling it to effectively process different types and amounts of stalks without requiring a complex multi-configuration system.
2Productivity
If the discharging space is reduced to increase harvesting capacity, then the feeding amount increases, but the stalks cannot be effectively spread and local load on chopper increases
Solution Approach 1:
The discharging space is segmented into multiple zones with different functions. The stalks are divided and directed through separate pathways, preventing congestion and ensuring effective spreading even when the overall discharging space is compact. This segmentation allows high feeding amounts to be processed without compromising stalk distribution.
Solution Approach 2:
The patent utilizes three-dimensional space optimization by arranging discharging components in multiple dimensions. Instead of simply expanding the horizontal discharging area, the system employs vertical and angular dimensions to achieve effective stalk spreading within a compact footprint, maintaining ease of operation despite increased feeding capacity.
3Adaptability or versatility
If the guide plate inclination is fixed, then the structure is simple, but it cannot adapt to varying feed rates and throwing requirements
Solution Approach 1:
The guide plate inclination is made dynamic rather than fixed. The guide plate can automatically adjust its angle in response to varying feed rates and throwing requirements, providing adaptability without requiring a complex manual adjustment mechanism. This dynamic adjustment is achieved through elastic deformation and force-balanced design.
Solution Approach 2:
The guide plate mechanism is designed to self-adjust based on operating conditions. The system uses the natural forces generated during operation (such as stalk pressure and airflow) to automatically position the guide plate at the optimal inclination, eliminating the need for complex external control mechanisms while achieving adaptability.
4Productivity
If traditional straw crushing device is used, then the structure is simple, but the processing capacity does not match the harvest flow rate of large feed
Solution Approach 1:
The crushing device is segmented into multiple working zones and blade elements that operate in parallel. This segmentation increases the overall processing capacity to match high harvest flow rates while keeping each individual segment relatively simple in structure, avoiding the need for a single complex monolithic crushing mechanism.
Solution Approach 2:
The patent combines multiple crushing functions into an integrated system where the flexible blade structure performs both cutting and crushing operations. By merging these functions into a unified adaptive mechanism, the device achieves high processing capacity without proportionally increasing structural complexity.
Data Source
AI summary
A self-adaptive throwing device for stalks cutting and discharging in the longitudinal axial flow combine harvesters comprises a longitudinal axial flow stalk discharging and guiding device, a stalks remnant shredding device, a wind direction and wind speed detection device, a reaping region identification device, an operating speed sensor, a shredding revolution speed sensor, a width adjustable throwing device, a self-adaptive throwing real-time control system. The throwing width is self-adaptive based on the machine operating speed, wind speed, wind direction, the position of the region having been cut and the region waiting to be cut, so as to achieve the full width throwing of the stalks remnant. An arc stalk guiding plate and a flow separating bar are mounted in the longitudinal axial flow stalk guiding device to make the shredding load more even.