Application of High Precision Ultra-high Pressure Device in Hydraulic Control System of Two-Sided Top Press
The experimental process of the research type large chamber static high pressure two-sided top press(Walker type two-stage 6/8 booster device)has high requirements for high-precision overpressure and pressure relief,the current overpressure rate of the hydraulic control system is 0.5 MPa/s,which is insufficient to meet the requirements of the experimental process.In view of the prob-lem,a high-precision hydraulic control system was developed,including of a micro-ultra-high pressure oil pump overpressure device and a dynamic pressure relief mode.The periodic fluctuation of the overpressure and pressure relief process was studied to ensure the stable and accurate output of high-pressure oil volume in the whole process,and the stability and reliability of the system's pressure lift-ing and pressure relief process.The experiment was conducted in the independently developed 30 MN double-sided top press(Walker type two-stage 6/8 pressurization device).The hydraulic control system can reach the ultra-high pressure of 63 MPa,and the pressure relief rate is 0.004 76 MPa/s,which is less than 0.008 MPa/s,meeting the pressure control accuracy of the experimental research on superhard materials.As the power device of the research type large chamber static and high-pressure two-sided top press,the system ensures the high-precision pressure lifting and pressure relief unloading process with ultra-high pressure,and promotes the domestic development of the hydraulic control system of the high pressure scientific experimental press in universities and scientific research in-stitutions.
hydraulic control systemmicro-ultra-high pressure oil pumptwo-sided top presssuperhard material
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