Baler Discharge Flap Control via Pressure Differential
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Solution Overview
Problem
Existing baler control devices are complex and often lack the ability to seamlessly transition between manual and automatic modes, especially in emergency situations, and cannot be directly controlled by a towing vehicle's control valve.
Innovation Solution
A device with a first and second pressure line, a distributor valve that adjusts based on pressure differences, and a control valve that can connect to a towing vehicle's pressure source, allowing for manual or automatic control of the outlet flap, enabling easy switching between modes and direct operator influence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If an automatic mode is provided in the baler control device, then automation level is improved, but ease of manual intervention and spontaneous return to manual mode deteriorates
Solution Approach 1:
The control device allows dynamic switching between automatic and manual modes. The system can operate in automatic mode during normal operation but can be quickly returned to manual mode in emergency situations, making the control characteristics adaptable to different operational requirements.
Solution Approach 2:
The system changes its control parameters by switching between modes. In automatic mode, the control valve positions are controlled automatically based on sensor feedback. In manual mode, the operator can directly control the valve positions, changing the control parameter from automated to manual.
2Extent of automation
If the control device is designed with complex automation features, then automation level is improved, but device complexity increases
Solution Approach 1:
The control device is designed to perform multiple functions: it can operate in automatic mode with full automation, in manual mode with direct operator control, and in a mixed mode where certain functions are automated while others remain manual. This multi-functionality reduces the need for separate dedicated systems for each mode.
Solution Approach 2:
The control device acts as an intermediary between the automated control system and the manual control system. It can process automated control signals while also accepting manual override inputs, mediating between the two control approaches and simplifying the overall system architecture.
3Ease of operation
If the outlet flap drive is controlled by pressure lines from a towing vehicle, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The control system is segmented into separate pressure lines for different functions. One pressure line controls the outlet flap drive, while another pressure line controls the distributor valve for mode switching. This segmentation allows the towing vehicle to control multiple functions independently through a single hydraulic system.
Solution Approach 2:
The control device uses the towing vehicle's existing hydraulic system to provide control functionality. By utilizing the pressure lines already available from the towing vehicle, the system avoids the need for separate dedicated control systems, reducing overall complexity while maintaining ease of operation.
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
Enables efficient and reliable operation of balers in both manual and automatic modes, allowing for easy manual override and direct control via a towing vehicle's control valve, improving operational flexibility and safety.
Implementation Method 1
Pressure measuring means effective on the pressure lines and suitable for determining a pressure which is present in the pressure line
Implementation Method 2
The value of the pressure difference can be equivalent to the direction of flow of a pressure medium in the device or in the pressure lines of the device
Implementation Method 3
This control valve is preferably connected to a pressure source in such a way that it can pressurize either the first or the second pressure line
Data Source
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Figure 2
AI summary
A device (38) for controlling the discharge flap (30) of a baler (10) is provided in at least one manual and one automatic mode, with a first and a second pressure line (58a, b) via which a discharge flap actuator (48) can be selectively pressurized, wherein pressure measuring means (56a, b) are effectively connected to the pressure lines (58a, b) which are suitable for determining a pressure present in the pressure line (58a, b) in each case, and a distributor valve (60) having at least one first and one second opening position (D, F) as well as a closing position (E) is connected downstream of the pressure measuring means (56a, b) to the pressure lines (58a, b), which in the at least one automatic mode assumes a predetermined position (D, E, F) depending on the value of a pressure difference between the determined pressures.Furthermore, a baler (10) is proposed with a discharge flap (30) which, by means of a discharge flap actuator (48), can be moved at least to a first position in which the discharge flap (30) closes a compression chamber (26) of the baler (10) at least in the western part, and to a second position in which it opens an opening (32) through which a bale (12) can leave the compression chamber (26) of the baler (10), and with a device (38) for actuating the discharge flap (30). In addition, a method for controlling the discharge flap (30) of such a baler (10) is shown in at least one manual and one automatic mode, in which the pressure measuring means (56a, b) determine a pressure present in the pressure line (58a, b), and the distribution valve (60) assumes a predetermined position (D, E, F) depending on the value of a difference between the determined pressures, at least in the at least one automatic mode.