液压冲击器配合间隙出口流速的影响因素权重分析  

Weight Analysis on Influencing Factors of Outlet Velocity for Hydraulic Impactor Fitting Clearance

作　　者：曹泽钰 杨国来[1,2] 曹文斌 姜明琦[1] 马伟 CAO Ze-yu;YANG Guo-lai;CAO Wen-bin;JIANG Ming-qi;MA Wei(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China;State Key Laboratory of Fluid Power and Mechatronic Systems,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050 [2]浙江大学流体动力与机电系统重点实验室,浙江杭州310027

出　　处：《液压气动与密封》2023年第5期9-13,共5页Hydraulics Pneumatics & Seals

基　　金：国家重点实验室开放基金(GZKF-201823)。

摘　　要：为了分析液压冲击器配合间隙出口流速的影响因素权重,以平行平板泄漏机理为理论依据,首先通过SPSS软件将间隙高度、锥度、密封长度、压差4种因素进行正交试验设计,产生16组不同水平因素的组合进行Fluent流场仿真;其次通过控制变量法将各单因素对配合间隙出口流速的影响进行分析;最后都使用极差法对上述仿真结果进行权重分析。两种方式结果都表明,间隙高度、锥度和压差与液压冲击器配合间隙出口流速呈正相关,而密封长度与之呈负相关;间隙高度对出口流速的影响最大,其次为密封长度,而压差和锥度对其影响最小。这为液压冲击器减少配合间隙泄漏冲蚀的设计提供了参考。In order to analyze the weight of the influencing factors of the flow velocity at the outlet of the hydraulic impactor fitting clearance,taking the leakage mechanism of the parallel plate as the theoretical basis,the four factors of clearance height,taper,seal length,and pressure difference were firstly designed by SPSS software.The Fluent flow field simulation is carried out by the combination of different level factors,and the weight analysis of the simulation results is carried out by the range method.Secondly,the influence of each single factor on the flow velocity at the outlet of the fitting gap is analyzed by the control variable method.The results of both methods show that the gap height,taper and pressure difference are positively correlated with the outlet flow rate of the hydraulic impactor fitting clearance,while the seal length is negatively correlated with it;the gap height has the greatest influence on the outlet flow rate,followed by the seal length,and the pressure Misalignment and taper have the least effect on it.This provides a reference for the design of hydraulic impactor to reduce leakage and erosion of fit clearance.

关 键 词：液压冲击器 间隙泄漏 出口流速 正交试验 FLUENT 

分 类 号：TH137[机械工程—机械制造及自动化]