Combine Harvester Concave Bar Angled Configuration
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Solution Overview
Problem
Conventional concave bars and separation grates in combine harvesters are not optimized for maximum threshing and separation efficiency, leading to inefficient harvesting and waste of crop material.
Innovation Solution
The concave bar configuration features bars angled between 20 to 90 degrees to maximize threshing surface area and include a separation grate with interchangeable finger-like protrusions for effective grain separation, improving both threshing and separation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional concave bars and separation grates are used, then the structure is simple and easy to manufacture, but threshing efficiency is low and crop material is wasted
Solution Approach 1:
The concave bars are configured with varying angles (20 to 90 degrees) and positions to create different local threshing characteristics. This local quality variation optimizes threshing efficiency for different crop types and conditions, allowing the system to handle diverse agricultural materials effectively while maintaining overall system productivity
Solution Approach 2:
The separation grate incorporates interchangeable finger-like protrusions that can be adjusted or replaced based on crop requirements. This dynamic configurability allows the threshing system to adapt to different crop types, moisture levels, and harvesting conditions, maximizing threshing efficiency without requiring a completely different device for each scenario
2Loss of substance
If conventional separation grates are used, then the device complexity is low, but grain separation is incomplete and grain is lost
Solution Approach 1:
The separation grate is divided into multiple finger-like protrusions with specific spacing and angles. This segmentation creates numerous small separation zones that work in parallel, ensuring thorough grain separation from chaff and straw. The segmented structure prevents grain loss by providing multiple opportunities for grain to fall through to the collection area
Solution Approach 2:
The finger-like protrusions act as intermediary elements between the threshing rotor and the grain collection area. These intermediaries agitate and separate the crop material, allowing grain to be extracted from chaff and straw while preventing premature discharge of unseparated material back into the field
3Area of moving object
If conventional concave bars are used, then manufacturing is simple, but threshing surface area is insufficient for hard-to-thresh crops
Solution Approach 1:
The concave bars are manufactured with specific angle parameters (20 to 90 degrees) and dimensional specifications that maximize threshing surface area. By changing the angular and dimensional parameters of the bars, the system achieves increased effective threshing area that handles hard-to-thresh crops like small grains and leafy vegetables, while the parameters remain within standard manufacturing capabilities
Data Source
AI summary
A concave separator or concave separation grate assembly and configuration for separating operations of a combine harvester is disclosed having integrated, interchangeable, and removable finger-like like configurations and assortments that can allow full separation of crop material from chaff, straw, vines and the like, thereby increasing grain separating capacity in a combine, improved breaking up the chaff-grain material, among other advantages. The separator grate assembly can include a bracket or grate member, and a plurality of first protruding members secured to the bracket member and having a first configuration, the first protruding member having a proximal end and a distal end. The first protruding members can include an elevation or angle relative to a horizontal plane when secured to the bracket member, and wherein each of the plurality of first protruding members can be equally spaced apart from each other when secured the bracket member.