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    徐海涛, 缪宏钢, 翁涛, 安琦. 汽车发动机张紧轮主轴力学分析及其疲劳寿命计算方法[J]. 华东理工大学学报(自然科学版), 2021, 47(1): 110-115. DOI: 10.14135/j.cnki.1006-3080.20191107001
    引用本文: 徐海涛, 缪宏钢, 翁涛, 安琦. 汽车发动机张紧轮主轴力学分析及其疲劳寿命计算方法[J]. 华东理工大学学报(自然科学版), 2021, 47(1): 110-115. DOI: 10.14135/j.cnki.1006-3080.20191107001
    XU Haitao, MIAO Honggang, WENG Tao, AN Qi. Mechanics Analysis and Fatigue Life Calculation Method of Tensioner’s Spindle in Automotive Engine[J]. Journal of East China University of Science and Technology, 2021, 47(1): 110-115. DOI: 10.14135/j.cnki.1006-3080.20191107001
    Citation: XU Haitao, MIAO Honggang, WENG Tao, AN Qi. Mechanics Analysis and Fatigue Life Calculation Method of Tensioner’s Spindle in Automotive Engine[J]. Journal of East China University of Science and Technology, 2021, 47(1): 110-115. DOI: 10.14135/j.cnki.1006-3080.20191107001

    汽车发动机张紧轮主轴力学分析及其疲劳寿命计算方法

    Mechanics Analysis and Fatigue Life Calculation Method of Tensioner’s Spindle in Automotive Engine

    • 摘要: 以汽车发动机臂式张紧轮机构为研究对象,对张紧轮工作过程进行力学分析,构建了张紧轮主轴受力的力学计算模型,以及张紧轮主轴弯曲应力的计算方法。结合累积疲劳损伤理论和雨流计数法,构建了张紧轮主轴疲劳寿命的计算方法。结合一个具体算例,数值计算了张紧轮主轴的疲劳寿命,并与实际寿命进行了对比。研究了若干参数对张紧轮主轴力学性能和疲劳寿命的影响规律。结果表明,影响张紧轮主轴疲劳寿命的主要因素是皮带轮与力臂之间的距离l1和衬套长度l2,减小l1l2均可有效延长张紧轮主轴的疲劳寿命,张紧轮力臂长度L和涡卷弹簧扭转刚度T'对张紧轮主轴寿命无显著影响。

       

      Abstract: Arm-type tensioner is widely used in the automotive engine belt system, whose spindle often break during actual working process caused by fatigue. It is necessary to study the mechanics properties of the tensioner and try to find a method for calculating the spindle’s fatigue life. In this paper, taking the arm-type tensioner in automotive engine as a research object, the mechanics analysis is carried out for the tensioner in working process. The mechanics model for calculating the forces and the method for calculating the bending stress of the tensioner’s spindle are established. The fatigue life of the tensioner’s spindle is calculated by using the fatigue theory and rain-flow counting method. With a specific example, the fatigue life of the tensioner’s spindle is calculated numerically and verified by comparing with the actual life of spindle. Several parameters’ influences on the mechanics performance and fatigue life of the tensioner’s spindle are studied. It is found that the main factors affecting the fatigue life of the tensioner’s spindle are the distance between pulley and rotating arm (l1), and the bushing length (l2), decreasing l1 and l2 can effectively increase the fatigue life of the spindle, while the length of the arm (L) and the vortex spring torsion stiffness (T') have no significant effects on the fatigue life of the tensioner’s spindle.

       

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