The Design and Simulation for Pressure-control System of One Pressure Vessel

This research object is pressure control system of large pressure vessel, which is a special equipment simulated deep-sea pressure conditions. reference related literature and research results at home and abroad, the measure of forced changing pressure vessel volum is wildly used in control system about pressure vessel. However, for controling a large vessel system, the former measure will be not satisfied. So a method increasing pressure by breathing higher pressure water into vessel compulsory and setting a drain regulator to reduce pressure is used in this control system.Structure design and component selection of this system is finished in this paper, according to the design of the control system property requirements, for a volume of 75m 3.A new suitable solution for pressure control of large vessel is put forward based on fluid mechanics theory, which adjusts pressure of large vessel by changing quality in the vessel. The validity and realizability of this control system has been proved by analysis calculation and Semi-physical simulation model, provides a theoretical support for this sysytem. First of all this paper introduces control system structure and overall design. Secondly a discussion about storing energy pressure tank compression scheme in order to achieve the 15MPa high pressure water is made, including: static analysis of pressure mode, pressurized plan, design of energy storage tank structure, etc. Then design of the systematic hydrostatic pipe and selection of hydraulic components reference various hydraulic components selection material, according to the system’s technical parameters and performance requirements, after what Semi-physical simulation model is established through software AMESim. Input device parameters of the simulation model according to the theoretical calculation of data, run every test mode, do all the testing process, get intuitive simulation curve and optimize the design of the system parameters, etc. The hybrid control strategy using pressure regulator and switch valve is more superior than separate regulator control strategy, which is analyzed emphatically in the simulation analysis. Finally, the safety control and error control is put forward, which should be taken seriously, considerring the actual use of test system.