Angled Flat Wall Rotor Cage with Adjustable Vanes
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Solution Overview
Problem
Existing threshing and separating systems in agricultural combines face inefficiencies in power consumption and crop material transport, particularly with rotor cage designs that have constant diameters or fixed vane configurations, which hinder effective separation and throughput.
Innovation Solution
A rotor cage design featuring a first and second angled flat wall, a curved wall, and adjustable vanes connected to these walls, allowing for controlled crop material flow and efficient redirection during rotation, enhancing flow efficiency and adaptability to different harvesting conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a rotor cage with constant diameter and fixed vane configuration is used, then the device complexity is reduced, but the crop material flow efficiency and adaptability to different crops deteriorate
Solution Approach 1:
The rotor cage employs adjustable vanes that can be positioned at different angles and locations along the rotor cage perimeter. This dynamic configuration allows the system to adapt to different crop types and harvesting conditions, optimizing material flow efficiency without requiring a completely different rotor cage design for each application.
Solution Approach 2:
Different sections of the rotor cage can have vanes with different pitch angles and positions tailored to specific local requirements. This allows optimization of material flow in different regions of the rotor cage to handle varying crop characteristics along the threshing path, improving overall productivity while maintaining a relatively simple basic structure.
2Adaptability or versatility
If adjustable vanes are added to the rotor cage, then the adaptability to different harvesting conditions is improved, but the device complexity increases
Solution Approach 1:
The adjustable vane mechanism allows the rotor cage to be configured for different crop types and harvesting conditions. The vanes can be positioned at various angles and locations to optimize performance for specific crops, providing versatility while maintaining a relatively simple adjustable structure compared to having multiple fixed rotor cages.
Solution Approach 2:
A single rotor cage design with adjustable vanes can serve multiple functions and handle different crop types, replacing the need for multiple specialized rotor cages. This multi-functionality approach reduces the overall system complexity while improving adaptability to various harvesting conditions.
3Manufacturing precision
If fixed pitch vanes are used in the rotor cage, then the manufacturing precision is simplified, but the power consumption and material transport efficiency deteriorate
Solution Approach 1:
The adjustable vane pitch allows optimization of the rotor cage performance for different crop conditions, improving material transport efficiency and reducing power consumption. By adjusting the vane angles to match specific harvesting requirements, the system achieves better energy efficiency compared to fixed pitch vanes that must operate at a compromise setting for all conditions.
Data Source
Figure 1
Figure 2~3
AI summary
A threshing and separating system (130) for an agricultural harvester (100) includes: a rotor (131); a rotor cage (200) at least partially enclosing the rotor (131), the rotor cage (200) including a first flat wall (201), a second flat wall (202) connected to and angled with respect to the first flat wall (201), and a curved wall (203) connected to the second flat wall (202); and at least one vane (210, 220) connected to the first flat wall (201) or the second flat wall (202).