Transactions of Materials and Heat Treatment

Title：Design and simulation analysis on pre-charge valve group for hydraulic supply system of proportional variable pump

Authors： Huang Zhouxuan1 2 3 Liu Yunqing1 2 3 Zhang Xiaoli4 Wang Shuanqing1 2 3 Wang Xue1 2 3 Qian Baoxu1 2 3

Unit： 1.Lanzhou LS Heavy Machinery Technology Co. Ltd. 2.Key Laboratory of Intelligent Control of Metal Forming Equipment 3.Gansu Large Fast Forging Hydraulic Equipment Technology Research Center 4.Lanzhou Ls Group Co. Ltd. Energy Equipment Engineering Research Institute

KeyWords： fast forging press proportional variable pump pre-charge valve group hydraulic supply pressure damping hole diameter control chamber diameter

ClassificationCode：TH137

year,vol(issue):pagenumber：2023,48(7):162-169

Abstract：

A pre-charge valve group for hydraulic supply system of rapid forging hydraulic unit was designed, and when the swing angle of proportional variable pump changed instantaneously, the pre-charge valve group adjusted the opening of valve core in time according to the set pressure, so that the hydraulic supply pressure remained within the allowable range of oil suction for the proportional variable pump. Then, in order to verify the influence of key parameters such as damping hole diameter, control chamber diameter, spring stiffness and pre-pressure in the design of pre-charge valve group on the valve characteristics and the hydraulic supply pressure of hydraulic supply system for rapid forging hydraulic unit, the simulation model of the pre-charge valve group and the hydraulic supply system with proportional variable pump for rapid forging press was established by the AMESim hydraulic simulation technology, and the accuracy of the simulation model was verified according to the samples and the test parameters of rapid forging press. Through the simulation and comparative analysis of different parameters, it is concluded that the diameters of damping hole and control chamber directly affect the response characteristics of valve group and the pressure stability of system, while the spring stiffness and the pre-pressure have no obvious impact, and the conclusion is applied to the parameter design of the pre-charge valve group.

Funds：

兰州市科技计划项目（2022-2-1）

作者简介：黄周轩（1988-），男，学士，工程师 E-mail：choution@126.com

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