摘要
本文提出一种将理论分析、数字模拟、试验研究相结合,进行大功率液压系统压力瞬变研究的方法,并用快锻液压机的压力瞬变分析实例,证明了该方法的有效性,得到了若干有实用价值的结论.
There exists in general pressure transient in a high-power hydraulic system with high pressure and large flow. How to limit the transient pressure is crucial to guaranteeing' normal system operation and good dynamic performance. A new transient analyzing method is proposed, in which the pipelines are described as a model with distributed parameters and the characteristic method is used to solve it while the main valve distributor and actuating mechanism are expressed as a model with lumped parameters and analyzed with the Runge-Kutta method. The two models are hten integrated by boundary conditions to give a mathematical model for the complete system. The numerical solution of pressure surges is obtained by digital simulation. A pressure surge test on a l 000 kN high-speed hydraulic forging press under varying working conditions has been carried out and some parameters have been measured and analyzed. Values of calculation are compared with measured ones.
出处
《华中理工大学学报》
CSCD
北大核心
1991年第A03期5-10,共6页
Journal of Huazhong University of Science and Technology
基金
国家自然科学基金
高等学校博士点专项科研基金的资助
关键词
液压系统
压力瞬变
建模
锻压设备
Hydraulic system
Pressure transient
Modelling
Digital simulation
Data processing
