液压冲击器内部流动特性分析  

Analysis of Internal Flow Characteristics of Hydraulic Impactor

作　　者：邓龙 杨国来[2] 柴红强 杨超 白桂香[2] DENG Long;YANG Guo-lai;CHAI Hong-qiang;YANG Chao;BAI Gui-xiang(College of Mechanical Engineering,Lanzhou Petrochemical Polytechnic,Lanzhou,Gansu 730060;College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou,Gansu 730050;Manufacturing Department,Wuxi Kunlun Fuji Instrument Co.,Ltd.,Wuxi,Jiangsu 214028)

机构地区：[1]兰州石化职业技术学院机械工程学院,甘肃兰州730060 [2]兰州理工大学能源与动力工程学院,甘肃兰州730050 [3]无锡昆仑富士仪表有限公司生产制造部,江苏无锡214028

出　　处：《液压与气动》2021年第8期115-121,共7页Chinese Hydraulics & Pneumatics

基　　金：甘肃省流体机械及系统重点实验室开放基金(kfms2018-10);兰州石化职业技术学院2018年教科研项目(KJ2019-13)。

摘　　要：为了研究液压冲击器内出现气蚀的原因,通过反馈随动原理,系统分析了冲击器工作过程。基于数学模型搭建AMESim仿真模型,得到活塞和阀芯对应的速度曲线,同时结合PumpLinx软件仿真得到冲击器内流道瞬态流场,分析单个运动周期内的压力云图及流线图,从而确定气蚀问题产生的位置及原因。通过试验分析,验证了联合仿真结果的准确性。对解决产品使用过程中出现的薄弱环节及潜在隐患,进而提高其工作可靠性具有十分重要的理论和现实意义。In order to study the causes of cavitation in the hydraulic impactor,the working process of the impactor is systematically analyzed through the principle of feedback follow-up and the related mathematical models are established.Based on this,the AMESim simulation model is accurately built and the corresponding velocity curves of the piston and the spool are obtained.At the same time,combined with PumpLinx software,the transient flow field of the flow passage in the impactor is jointly simulated,and the pressure cloud and the streamlines in a single motion cycle are analyzed.Thus,the location and the cause of the cavitation problem are determined.Through experimental analysis,the accuracy of the co-simulation results is verified.This has very important theoretical and practical significance for solving the weak links and potential hazards in the product use process,and then improving its working reliability.

关 键 词：液压冲击器 工作过程 联合仿真 气蚀 试验分析 

分 类 号：TH137[机械工程—机械制造及自动化] TH325