Header Float Arm Valve Control to Prevent Rutting and Ground Contact
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Solution Overview
Problem
Hinged draper headers experience issues with float arms lifting and engaging with the ground during harvesting, leading to damage to the field and headers due to the formation of ruts and potential damage to the headers.
Innovation Solution
A system for controlling float arms between locked and unlocked configurations using pressurized fluids of different pressures to manage the position and flexibility of the cutter bar, allowing it to conform to ground topography and prevent engagement with the ground.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If float arms are allowed to move freely in unlocked configuration to follow ground contours, then adaptability to ground topography is improved, but harmful engagement with the ground occurs causing ruts and damage
Solution Approach 1:
The float arm control system dynamically transitions the float arms between locked and unlocked configurations based on operating conditions. The system uses a control valve to regulate pressurized fluid to an actuator, enabling the float arms to adapt their state (locked for stability, unlocked for contour following) rather than remaining in a fixed configuration, thus resolving the contradiction between adaptability and harmful engagement.
Solution Approach 2:
The system changes the positional parameter of the float arms by controlling the actuator with pressurized fluid through a control valve. By adjusting fluid pressure and flow, the system transitions the float arms between different configurations (locked/unlocked), enabling controlled adaptation to ground topography while preventing harmful engagement through precise parameter management.
2Object-affected harmful factors
If float arms are locked in retracted position to prevent ground engagement, then harmful factors are reduced, but ability to flex and follow ground contours is lost
Solution Approach 1:
The system provides dynamic control of float arm positioning through the actuator and control valve mechanism. Rather than maintaining a static locked position, the system can transition to unlocked configuration when needed, allowing the cutter bar to flex and follow ground contours while maintaining protection against harmful engagement through controlled transitions.
Solution Approach 2:
The float arm control system automatically responds to operational conditions by controlling fluid flow to the actuator. The system self-regulates the float arm position based on whether the header needs to maintain rigid locked configuration or flexible unlocked configuration, eliminating the need for manual intervention and enabling automatic adaptation to prevent harmful factors while maintaining adaptability.
3Measurement precision
If dual pressurized fluid sources with different pressures are used to control float arm position, then precision of position control is improved, but device complexity increases
Solution Approach 1:
The system uses pressurized fluid (hydraulic or pneumatic) transmitted through a control valve to actuate the float arm positioning mechanism. The dual fluid sources with different pressures enable precise control of the actuator, allowing fine adjustment of float arm position between locked and unlocked configurations. This hydraulic/pneumatic control method provides precise positioning while managing system complexity through standardized fluid power components.
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 effectively maintains harvest quality by controlling the float balance of the header, preventing pushing and associated damage, while allowing the cutter bar to flex and follow ground contours.
Implementation Method 1
The first source of pressurized fluid may include a first fluid at a first fluid pressure, and the second source of pressurized fluid including a second fluid at a second fluid pressure
Implementation Method 2
The first source of pressurized fluid may include a first fluid at a first fluid pressure, and the second source of pressurized fluid including a second fluid at a second fluid pressure
Data Source
AI summary
Systems, methods, and apparatus for controlling a position of one or more float arms in an unlocked configuration may include a first valve movable between a first position configured to cause the float arm to move to a locked configuration and a second position configured to cause the float arm to move to the unlocked configuration; a first source of pressurized fluid in communication with the first valve; and a second source of pressurized fluid in communication with the first valve. In the first position, the first valve may be configured to transmit the first fluid from the first source and, in response, to cause the float arm to move to the locked configuration. In the second position, the first valve may be configured to transmit the second fluid from the second fluid source and, in response, cause the float arm to move to the unlocked configuration.