顺序增压切换阀高温蠕变规律仿真研究  

Simulation of High-Temperature Creep Law for Sequential Turbocharging Switch Valve

作　　者：张博欣 贾建利[1] 钟毅 王丽君[1] 李圣辰 胥江 ZHANG Boxin;JIA Jianli;ZHONG Yi;WANG Lijun;LI Shengchen;XU Jiang(School of Mechatronic Engineering,Xi an Technological University,Xi an 710021,China;205 Geological Team,Chongqing Geological Prospecting Bureau,Chongqing 402160,China)

机构地区：[1]西安工业大学机电工程学院,陕西西安710021 [2]重庆市地勘局205地质队,重庆402160

出　　处：《车用发动机》2023年第1期20-26,共7页Vehicle Engine

基　　金：柴油机高增压技术国防科技重点实验室基金项目(6142212200203);陕西省科技厅重点研发计划项目(2023-YBGY-186)。

摘　　要：顺序增压切换阀在工作过程中需要承受高温和较高的压力,这会导致切换阀产生蠕变现象。在获取阀门材料310S不锈钢高温蠕变试验数据的基础上,获得了蠕变数学模型参数,建立了材料的Norton蠕变数学模型。采用ANSYS有限元仿真软件模拟分析了顺序增压切换阀18000 h工况下的应力场、单轴蠕变应变规律;基于Cocks-Ashby多轴蠕变系数,仿真得到了阀门多轴蠕变应变分布规律。仿真结果表明:阀门蠕变较大部位平均蠕变应变为8%;在引入多轴蠕变系数后,阀门关键节点的多轴蠕变应变除少数结构突变点外均低于2%。The sequential turbocharging switch valve needs to withstand high temperature and high pressure during the working process,which results in the creep phenomenon of switch valve.Based on the high temperature creep test data of 310S stainless steel,the creep mathematical model parameters were obtained,and the Norton creep mathematical model of material was established.The ANSYS finite element simulation software was used to simulate and analyze the stress field and uniaxial creep strain law of the sequential turbocharging switch valve under 18000 h working condition;Based on Cocks-Ashby multiaxial creep coefficients,the multiaxial creep strain distribution law of valve was obtained by simulation analysis.The simulation results show that the average creep rate of valve with a large creep is 8%.After introducing the multiaxial creep coefficient,the multiaxial creep strain for the key nodes of valve is less than 2%except for a few structural sudden changes.

关 键 词：顺序增压 切换阀 高温蠕变 有限元分析 蠕变试验 

分 类 号：TK421.8[动力工程及工程热物理—动力机械及工程]