Pneumatic Drive Pressure and Throttle Control for Lower Air Use
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Solution Overview
Problem
Conventional pneumatic drive systems are inefficient in terms of compressed air consumption due to the high interference resistance required, which leads to unnecessary energy expenditure.
Innovation Solution
A method involving pressure closed-loop control and adaptive throttle function management, where the pressure setpoint and throttle opening are adjusted based on the position of the drive element, time, and trigger signals, to optimize air usage during displacement movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a conventional exhaust air throttle is used to reduce drive-side excess of force, then high interference resistance is achieved, but compressed air consumption increases
Solution Approach 1:
The patent applies dynamics by making the throttle opening adaptive rather than fixed. The throttle opening is continuously adjusted based on the actual position of the drive element during displacement, allowing the system to optimize compressed air consumption while maintaining necessary interference resistance. This dynamic adaptation enables the throttle opening to vary throughout the displacement path, reducing air consumption compared to conventional fixed throttle settings.
Solution Approach 2:
The patent implements feedback control by using the actual position of the drive element to adaptively adjust the throttle opening. The control device receives position information and uses this feedback to optimize the throttle setting in real-time, creating a closed-loop control system that balances interference resistance requirements with compressed air consumption efficiency.
2Speed
If full supply pressure is applied to the first pressure chamber, then displacement movement is achieved, but unnecessary high pressure is maintained after initial acceleration
Solution Approach 1:
The patent applies dynamics by dynamically adjusting the pressure setpoint based on the displacement phase. During the initial acceleration phase, full supply pressure is applied to achieve rapid movement. After acceleration, the pressure setpoint is reduced to maintain movement without consuming unnecessary compressed air. This dynamic pressure adaptation resolves the contradiction between achieving displacement movement and minimizing energy consumption.
Solution Approach 2:
The patent implements periodic action by applying full supply pressure only during the initial acceleration phase and then reducing pressure for the remainder of the displacement path. This time-based periodic control strategy ensures that high pressure is applied only when necessary for acceleration, while lower pressure suffices for maintaining movement, thereby reducing overall compressed air consumption.
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
This approach allows for more efficient displacement movements by reducing compressed air consumption, achieving a balance between efficiency and interference resistance.
Implementation Method 1
by way of a first valve unit of a valve device, carrying out a pressure closed-loop control of a first pressure chamber of the pneumatic drive unit, in order to effect the displacement movement along a displacement path
Implementation Method 2
by way of a second valve unit of the valve device, providing a throttle function for compressed air which given the displacement movement escapes from a second pressure chamber of the pneumatic drive unit
Implementation Method 3
the pressure setpoint can be reduced after an initial acceleration phase of the displacement movement, in order to avoid an unnecessarily high pressure being provided in the first pressure chamber
Implementation Method 4
the throttle opening for example can be reduced towards the end of the displacement movement, in order to provide the braking effect which is necessary in particular for a gentle moving into an end position
Data Source
AI summary
Methods and systems for carrying out a displacement movement of a drive element of a pneumatic drive unit. The method including by way of a first valve unit of a valve device, carrying out a pressure closed-loop control of a first pressure chamber of the pneumatic drive unit, in order to effect the displacement movement along a displacement path, by way of a second valve unit of the valve device, providing a throttle function for compressed air which given the displacement movement escapes from the second pressure chamber of the pneumatic drive unit, in order to influence the displacement movement, and in dependence on a position of the drive element and/or the time and/or a trigger signal, adapting a pressure setpoint of the pressure closed-loop control and a throttle opening of the throttle function during the displacement movement.