Closed Pneumatic Cavity for Sensitive Manual Control
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Solution Overview
Problem
Existing fluid-actuated drive devices face challenges in providing sensitive and energy-efficient manual operation due to quasi-digital control of pressure control valves, which limits precise handling and is energy-intensive and susceptible to environmental influences.
Innovation Solution
A closed pneumatic cavity system with a variable-volume control chamber that changes continuously with manual operation, allowing for continuous variation of control pressure, enabling sensitive and precise control without constant external pressure supply, and is robust against environmental factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external control pressure source is used to supply pneumatic control pressure to the pressure regulator, then the pressure control valve can be actuated, but the system requires constant external pressure supply which increases energy consumption
Solution Approach 1:
The control device uses a closed pneumatic cavity system that generates control pressure internally through manual operation of the operating means. The system serves itself by converting manual mechanical input directly into pneumatic control pressure without requiring external pressure supply, thereby eliminating continuous energy consumption associated with external pressure sources.
Solution Approach 2:
The control pressure is generated periodically through manual actuation of the operating means rather than continuous external supply. The closed cavity system maintains pressure through the periodic manual input, allowing the system to operate with intermittent energy input rather than constant external pressure supply.
2Reliability
If a pressure regulator with external control pressure source is used, then pressure control is achieved, but the system is susceptible to environmental influences and functional impairment
Solution Approach 1:
The invention extracts the pressure control function from the external environment by using a closed pneumatic cavity system. The control pressure is generated internally within the sealed system through manual operation, removing the pressure control function from dependence on external pressure sources that are vulnerable to environmental influences.
Solution Approach 2:
The closed pneumatic cavity system creates an isolated, inert environment for pressure generation. The sealed cavity protects the control pressure generation mechanism from external environmental factors such as contamination, temperature variations, and other harmful influences that could impair functionality.
3Device complexity
If quasi-digital control of the pressure control valve is used, then simple control structure is achieved, but sensitive handling of objects is hardly possible
Solution Approach 1:
The manual operating means provides dynamic, continuously variable control of the control pressure through manual displacement. This dynamic control mechanism allows for sensitive adjustment of pressure levels, enabling precise and sensitive object handling while maintaining a relatively simple control structure without requiring complex digital or electronic systems.
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 energy-saving, reliable, and sensitive manual operation with precise control of fluid-actuated devices, reducing energy consumption and enhancing robustness against environmental influences.
Implementation Method 1
Compressed air enclosed in the pneumatic cavity system can be compressed to different degrees by manually moving the manual operating means, so that the internal pressure prevailing in the closed pneumatic cavity system changes
Implementation Method 2
the volume of which changes with the result of a constantly variable change in the control pressure can be changed continuously by manually moving the manual operating means
Data Source
Figure 1
AI summary
The invention proposes a working apparatus (1) which has an actuating device (17) which is suitable for actuating a fluid-actuated drive device (6). The actuating device (17) contains a valve (18) which can be activated on the basis of a pneumatic control pressure, which can be predetermined in a constantly variable manner by means of a control device (19). In this context, the actuating device (17) contains a closed pneumatic cavity system (37) which supplies the control pressure and to which belongs a variable-volume control chamber (38), of which the internal pressure forms the pneumatic control pressure. The volume of a control chamber (38), which belongs to the cavity system (37), can be altered, for the purpose of altering the control pressure, by manual movement of a manual-actuation means (44).