关键词: 超高压, 电动直驱, 压力控制, 动力机构

Abstract: A hyper-pressure control hydraulic system with direct electric drive was introduced to solve the shortages brought by the conventional hydraulic control system, which was based on the isostatic pressing equipment for producing high-quality diamonds and other superhard materials. It was used as a pressure compensation method mainly for the packing stage which was important to high-quality diamonds. The operational principles of this system was introduced, and the mathematical model was built. Main parameters of dynamic mechanisms and frequency charaeteristics of open loop of the system were analysed, and the influences of the main parameters such as effective area of hydraulic cylinder, effective volume of compresstion chamber and elastic stiffness of load on system characteristics were argued.

Key words: ultra-high-pressure, direct electric drive, pressure control, power mechanism