锻造机液压系统含气量对压力变化速率的影响理论与仿真分析  

Theoretical and Simulation Analysis of the Effect of Air Content in the Hydraulic System of a Forging Machine on the Pressure Change Rate

作　　者：秦丽霞 李晶 Qin Lixia;Li Jing(Shanxi Institute of Applied Science and Technology,Taiyuan Shanxi 030062)

机构地区：[1]山西应用科技学院,山西太原030062

出　　处：《山西冶金》2023年第4期97-99,110,共4页Shanxi Metallurgy

基　　金：液压系统中液压元件的气穴现象(KJCX202210)。

摘　　要：针对锻造机液压系统的含气量对液压系统压力变化速率的直接影响,建立油液的含气量、液压系统以及压力上升速率的数学模型,主要研究含气量对压力上升速率的影响,得到不同气体含量对压力上升速率影响最大时对应的油压值,并通过FLUENT仿真软件验证该结论的准确性。研究表明:随着初始含气量的变化,压力上升速率也在发生变化,且含气量越大,压力变化速率会变慢;通过对比找出不同含气量下压力速率上升最快的压力点,经分析发现,该数学模型和仿真模型误差在8%以下。该模型的研究有助于设计液压系统快速建压装置,可提高液压系统锻造响应时间及液压系统建压速度。Aiming at the direct impact of the gas content of the hydraulic system of a forging machine on the pressure change rate of the hydraulic system,a mathematical model of the gas content of the oil,the hydraulic system,and the pressure rise rate was established,mainly to study the impact of the gas content on the pressure rise rate,obtain the corresponding oil pressure values when different gas content has the greatest impact on the pressure rise rate,and verify the accuracy of this conclusion through FLUENT simulation software.The research shows that with the change of initial gas content,the rate of pressure rise also changes,and the greater the gas content,the slower the rate of pressure change.Through comparison,the pressure point at which the pressure rate increases the fastest under different gas contents is found.Through analysis,it is found that the error between the mathematical model and the simulation model is less than 8%.The study of this model is helpful for designing a rapid pressure build-up device for hydraulic systems,improving the forging response time of the hydraulic system,and improving the pressure build-up speed of the hydraulic system.

关 键 词：液压系统 含气量 建压速率 锻造机 

分 类 号：TG315.4[金属学及工艺—金属压力加工]