摘要
为了提高谷物干燥机的使用寿命,减少其故障的维修次数,运用可靠性分析理论对其使用寿命进行了分析研究。首先,对某型号谷物干燥机的维修数据进行了分析整理,根据维修记录得到的故障间隔时间拟合出了威布尔概率(WPP)图,基于图形法初步确定了其服从二参数威布尔分布;然后,利用点估计的优良性判别准则,采用粒子群算法求解似然函数得出了估计值,将其作为威布尔分布模型的参数;最后,采用K-S检验法对威布尔分布模型进行了检验,并在此基础上求得了谷物干燥机故障间隔时间的概率密度函数、概率分布函数和可靠度函数。研究结果表明:谷物干燥机的故障间隔时间服从二参数威布尔分布,并计算得到干燥机的平均故障间隔时间为249.8 h,且在可靠度为0.9时,预防性维修周期为137.6 h;该方法具有较高的精确度和易用性,对企业制定合理的维修决策具有一定的参考价值。
In order to improve the service life of the grain dryer and reduce the number of maintenance failures,its service life was analyzed and studied by using reliability analysis theory.Firstly,the maintenance data of a certain type of grain dryer was analyzed and sorted,and the Weibull probability plot(WPP)diagram was fitted according to the failure interval time obtained from the maintenance record.Based on the graphical method,it can be preliminarily determined to accept the two-parameter Weibull distribution.Then,the superiority of point estimation was used to judge Criterion,the estimated value obtained by solving the likelihood function with particle swarm algorithm was used as the parameter of the Weibull distribution model.Finally,the K-S(Kolmogorov-Smirnov)test method was used to test the Weibull distribution model,and on the basis,the interval time between failures of the grain dryer was obtained,with probability density function,probability distribution function,and reliability function.The results show that the failure interval of the grain dryer obeys the two-parameter Weibull distribution,and the average failure interval of the dryer is calculated to be 249.8 h,and when the reliability is 0.9,the preventive maintenance period is 137.6 h.The method has high accuracy and ease of use,and is of great significance for enterprises to make reasonable maintenance decisions.
作者
文昌俊
陈哲
徐云飞
邵明颖
左学谦
WEN Chang-jun;CHEN Zhe;XU Yun-fei;SHAO Ming-ying;ZUO Xue-qian(School of Mechanical Engineering,Hubei University of Technology,Wuhan 430068,China;Hubei Key Laboratory of Modern Manufacturing Quality Engineering,Wuhan 430068,China)
出处
《机电工程》
CAS
北大核心
2022年第7期972-977,共6页
Journal of Mechanical & Electrical Engineering
基金
国家自然科学基金资助项目(51875180)。
关键词
谷物干燥机
机械使用寿命
可靠性评估
威布尔分布模型
威布尔概率
可靠度函数
K-S检验
grain dryer
mechanical service life
reliability estimation
Weibull distribution model
Weibull probability plot(WPP)
reliability function
K-S(Kolmogorov-Smirnov)test
