Transactions of Materials and Heat Treatment

Title：Experimental study on unloading rules in hydraulic system with large flow and high pressure

Authors： JIANG Ting-ting1 TAN Jian-ping1 SI Yu-xiao1 2 SUN Kang1 2

Unit：１. College of Mechanical and Electronic Engineering Central South University Changsha 410012 China ２. State Key Lab of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027 China

KeyWords： large-scale hydraulic press unloading rules hydraulic shock

ClassificationCode：TG315

year,vol(issue):pagenumber：2012,37(5):80-83

Abstract：

To realize the stable and rapid unloading of large-scale hydraulic press and accurate proportional control of the process, the proportional cartridge throttle was utilized as the unloading valve with a displacement sensor in core. Experimental system with large flow and high pressure based on accumulator which supplied oil source was designed and established. The effect of different unloading curves and unloading time on hydraulic shock was investigated. The experimental results show that this experimental system can simulate the unloading process of system with large flow and high pressure, and the unloading curve based on the principle of energy uniform release makes the unloading time less than other unloading curves.

Funds：

国家科技重大专项(2009ZX04005-031)；流体动力与机电系统国家重点实验室开放基金(GZKF-201023)

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