Hydraulic Vane Actuation for Rotary Thresher Crop Flow Control
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Solution Overview
Problem
Current harvesting combines with rotary threshing systems face challenges in efficiently controlling crop flow and threshing aggression due to the difficulty in adjusting vane angles, which affects separation efficiency and power consumption, as existing methods require manual and labor-intensive adjustments amidst irritating crop dust and structural deformation.
Innovation Solution
A rotor cage top cover assembly with a horizontal flat section and downwardly angled sides, featuring rotatable vanes that can be adjusted using hydraulically powered linear actuators, allowing for simultaneous angle changes without structural deformation or secure fastening, enabling remote actuation to regulate crop flow and optimize threshing parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual adjustment of vane angles is used, then the structure is simple, but the ease of operation deteriorates due to labor-intensive adjustments amidst crop dust
Solution Approach 1:
The patent replaces the manual mechanical adjustment system with a hydraulic actuation system. The hydraulic cylinder (30) connects the adjustable vane (26) to the rotor assembly (10), allowing remote hydraulic actuation of the vane angle without manual intervention in the crop dust environment.
Solution Approach 2:
The patent employs hydraulic actuators to control the vane angles. The hydraulic cylinder (30) provides powered mechanical means to adjust the vane pitch angles remotely, eliminating the need for operators to manually adjust vanes amidst irritating crop dust.
2Adaptability or versatility
If vane angle adjustment is implemented, then the adaptability improves, but the device complexity worsens due to multiple bolts and deformation constraints
Solution Approach 1:
The patent replaces the complex mechanical system of multiple tight bolts and deformation constraints with a hydraulic actuation system. The hydraulic cylinder (30) provides powered means to adjust vane angles without requiring the vanes to be deformed or secured by numerous very tight bolts.
3Ease of operation
If remote actuation of vanes is attempted, then the ease of operation improves, but the reliability deteriorates due to wagging the tail of a few vanes
Solution Approach 1:
The patent makes the hydraulic actuation system universal by connecting it to the rotor assembly (10) in a manner that allows simultaneous adjustment of multiple vanes (26). This ensures that changing the angle of selected vanes produces significant change in performance rather than just wagging the tail of a few vanes.
Solution Approach 2:
The patent replaces the unreliable mechanical hinge system with a hydraulic actuation system that provides reliable and significant control over vane angles. The hydraulic cylinder (30) connects to the rotor assembly (10) to enable effective remote actuation of vanes.
Data Source
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AI summary
Disclosed is a harvesting combine rotor cage top cover assembly that includes an overhead roof formed from a substantially horizontal flat section and downwardly angled side sections. A series of substantially parallel vanes are located beneath the overhead roof. Each vane is formed from a substantially flat top section located against the roof horizontal flat section and downwardly laterally extending legs being angled on their sides and having an arcuate bottom. The sides of the vanes are rotatable about a central pivot for promoting or retarding the flow of material in the rotor cage.