Agricultural Toolbar Hydraulic Height Control
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Solution Overview
Problem
Current agricultural toolbar systems with master/slave rephase hydraulic systems face issues such as uneven raise and lower functions, increased hydraulic oil heat, and risk of component failure, leading to inefficient operation and excessive wear, particularly in precision planting and tilling applications.
Innovation Solution
A hydraulic system with non-rephase cylinders and a common rail hydraulic system, utilizing position sensors and a computer console for precise control of toolbar sections, allowing for uniform depth maintenance and manual or automatic adjustment of toolbar height, reducing oil consumption and heat, and integrating features like load monitoring and automatic adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If master/slave rephase hydraulic systems are used to raise and lower toolbar frames, then the toolbar sections can be positioned, but the system experiences uneven raise and lower functions when cylinders get out of phase, reduced efficiency, increased hydraulic oil heat, and increased risk of pressure intensification causing cylinder failure
Solution Approach 1:
The hydraulic system is segmented into independent non-rephase cylinders, each with its own control valve, rather than using interconnected master/slave cylinders. This segmentation allows each cylinder to operate independently, eliminating the phase synchronization problems that cause uneven raise and lower functions while improving overall system reliability
Solution Approach 2:
Position sensors are integrated into each wheel unit to provide real-time feedback on the toolbar section positions. This feedback is sent to the control console, which automatically adjusts the hydraulic cylinders to maintain proper phase alignment and prevent the out-of-phase conditions that lead to uneven operation and system failure
2Ease of operation
If master/slave rephase hydraulic systems are used, then toolbar sections can be raised and lowered, but the system generates increased hydraulic oil heat and experiences reduced efficiency
Solution Approach 1:
The problematic master/slave rephase mechanism is extracted and replaced with independent non-rephase cylinders. This removal eliminates the inefficient oil transfer process between master and slave cylinders that generates excessive heat, while maintaining the essential raise and lower functionality through direct hydraulic control of each cylinder
3Ease of operation
If master/slave rephase hydraulic systems are used, then toolbar positioning is achieved, but there is increased risk of pressure intensification causing cylinder failure
Solution Approach 1:
The system uses dynamic control valves for each independent cylinder that can adjust oil flow in real-time based on position sensor feedback. This dynamic control prevents pressure intensification by regulating hydraulic pressure according to actual cylinder position and load conditions, thereby preventing cylinder failure while maintaining positioning capability
4Adaptability or versatility
If master/slave hydraulic systems are used, then hydraulic components can be controlled, but the system requires dedicated and specific hydraulic supply hose routing and different size cylinders based on volumetric values
Solution Approach 1:
All hydraulic cylinders are standardized to the same size and specification, with universal hose routing that can serve any cylinder on the toolbar. This universal configuration eliminates the need for dedicated specific routing and different sized cylinders, while maintaining the ability to control all hydraulic components through the common rail system with individual control valves
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
The system ensures consistent and efficient operation of toolbar components, reducing wear and oil consumption, while maintaining precise control over planting and tilling depths, and allowing for automated adjustments to optimize hydraulic oil usage and system performance.
Implementation Method 1
a hydraulic system with non-rephase cylinders and a common rail hydraulic system
Implementation Method 2
a position sensor on the toolbar frame wheels
Data Source
AI summary
An agricultural toolbar has a center section and opposite wings which are horizontally foldable between transport and field positions. The toolbar has a hydraulic system which is very adaptable to many different hydraulically controlled features and options, without sacrificing the primary purpose of the system, which is accurately controlling the operating height of the toolbar, to achieve optimal planting depth of modern precision seed and fertilizer application systems.