Fluid Circuit Sizing Using Simulation Feedback for Stroke Time
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Solution Overview
Problem
Existing energy-saving fluid circuit systems that reuse exhaust air face performance deterioration due to inappropriate sizing of instruments such as fluid control valves, pipes, and check valves, leading to suboptimal stroke times and pressures.
Innovation Solution
A fluid circuit selection system that includes a cylinder selection section, a database of instrument combinations by size, and reselection sections to choose larger instruments based on simulation results for stroke time and pressure criteria, ensuring appropriate sizing for energy-saving fluid circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If instruments are selected without appropriate sizing consideration, then the circuit can be assembled quickly, but the stroke time becomes too long and pressure drops below minimum working pressure
Solution Approach 1:
The system performs preliminary simulation calculations before final instrument selection to predict stroke time and pressure outcomes. By calculating these parameters in advance for different instrument size combinations, the system determines the appropriate sizing before actual circuit assembly, preventing both overly long stroke times and pressure drops below minimum working pressure.
Solution Approach 2:
The system uses simulation results as feedback to iteratively adjust instrument size selections. The simulation calculates stroke time and pressure for given instrument combinations, and these results feed back into the selection process to refine the sizing, ensuring optimal performance metrics are achieved.
2Productivity
If instruments of larger sizes are selected, then stroke time decreases and pressure increases, but the system complexity and cost increase
Solution Approach 1:
The system systematically varies instrument size parameters to find the optimal configuration. By changing the size parameters of instruments and observing the effects on stroke time and pressure through simulation, the system identifies the minimum instrument sizes required to achieve desired performance, avoiding unnecessary complexity from oversized components.
3Device complexity
If instruments of smaller sizes are selected, then system complexity is reduced, but stroke time exceeds maximum allowed time and pressure drops below minimum working pressure
Solution Approach 1:
The system applies pneumatic simulation principles to calculate pressure and flow characteristics for different instrument size configurations. By using pneumatic circuit simulation, the system can predict whether smaller instruments will maintain sufficient pressure and achieve required stroke times, ensuring reliability without unnecessary complexity.
Data Source
AI summary
A selection system for hydraulic circuits has a cylinder selection processing unit; a database in which information pertaining to a combination of a plurality of apparatuses is registered in advance; combination selection processing units for reading information pertaining to the combination of the plurality of apparatuses in order of size from the database, and selecting an apparatus; and re-selection processing units for re-selecting an apparatus that is the next size up when a stroke time obtained by a simulation including some of the apparatuses selected by the combination selection unit exceeds an upper-limit stroke time, or when pressure after a return process is less than or equal to minimum working pressure.