CAJ | 학술논문

润滑油光谱分析是变速箱磨损状态监测的重要手段。以某重载车辆变速箱台架试验中润滑油原子发射光谱分析得到的元素成分含量检测数据为基础，通过相关性分析和磨损机理分析确定了能够反映整机磨损状态和失效特点的金属元素，并对补油、换油后的光谱检测数据进行了修正，将变速箱试验过程中特征金属元素的含量随试验时间的变化规律表示为线性函数的形式。然后，综合考虑检测数据的时序规律与离散性，利用不同时刻光谱检测数据的正态分布均值和标准差进行变速箱可靠性评估，进一步讨论了失效阈值对可靠性评估结果的影响。研究表明，重载车辆变速箱润滑油中的Cu元素浓度与其他金属元素浓度的相关性较高、绝对值较大，既能够反映变速箱整体磨损状态，又便于检测，利用多个试验样本的润滑油Cu元素浓度光谱检测时序数据，可以对重载车辆变速箱进行可靠性评估；若失效阈值取定值，则失效阈值越大，同一时刻变速箱的可靠度越高；若失效阈值取随机分布，则失效阈值的离散度越大，可靠度随时间延长而降低的趋势越缓慢。当可靠度R大于0.9时，失效阈值的均值对可靠性评估结果的影响十分显著，同一时刻变速箱的可靠度随失效阈值标准差的增大而降低。将光谱分析与概率统计学结合进行变速箱可靠性评估方法研究，扩展了光谱分析技术的应用范围，具有创新性。
윤활유광보분석시변속상마손상태감측적중요수단。이모중재차량변속상태가시험중윤활유원자발사광보분석득도적원소성분함량검측수거위기출，통과상관성분석화마손궤리분석학정료능구반영정궤마손상태화실효특점적금속원소，병대보유、환유후적광보검측수거진행료수정，장변속상시험과정중특정금속원소적함량수시험시간적변화규률표시위선성함수적형식。연후，종합고필검측수거적시서규률여리산성，이용불동시각광보검측수거적정태분포균치화표준차진행변속상가고성평고，진일보토론료실효역치대가고성평고결과적영향。연구표명，중재차량변속상윤활유중적Cu원소농도여기타금속원소농도적상관성교고、절대치교대，기능구반영변속상정체마손상태，우편우검측，이용다개시험양본적윤활유Cu원소농도광보검측시서수거，가이대중재차량변속상진행가고성평고；약실효역치취정치，칙실효역치월대，동일시각변속상적가고도월고；약실효역치취수궤분포，칙실효역치적리산도월대，가고도수시간연장이강저적추세월완만。당가고도R대우0.9시，실효역치적균치대가고성평고결과적영향십분현저，동일시각변속상적가고도수실효역치표준차적증대이강저。장광보분석여개솔통계학결합진행변속상가고성평고방법연구，확전료광보분석기술적응용범위，구유창신성。
Spectrometric oil analysis is of great importance for wear condition monitoring of gearbox .In this context ,the con‐tents of main elements compositions in the bench test of heavy vehicle gearbox are obtained by atomic emission spectrometric oil analysis first .Then correlation analysis of the test data and wearing mechanism analysis are carried out to get the metal element which could be used to describe the wearing and failure of the gearbox .The spectrometric data after filling/changing oil are cor‐rected ,and the laws of the contents of main elements compositions during tests are expressed as linear functions .After that ,the reliability assessment is executed with considering the degradation law and discreteness of test data ,in which the mean and standard deviation of normal distribution of spectrometric oil data at each time point are adopted .Finally ,the influences of the threshold are discussed .It has been proved that the contents of metal element Cu ,which is got by spectrometric oil analysis of different samples ,could be used to assess the reliability of heavy vehicle gearbox .The reason is that the metal element Cu is closely related to the general wear state of gearbox ,and is easy to be measured .When the threshold of Cu content is treated as a constant ,bigger threshold means higher reliability at the same time ,and the mean value of threshold has significant impact on the reliability assessment results as R>0.9 .When the threshold is treated as a random variable ,bigger dispersion of threshold means smaller slope of reliability against time ,and also means lower reliability of gearbox as R>0.9 at the same time .In this study ,the spectrometric oil analysis and probability statistics are used together for the reliability assessment of gear box ,which extends the application range of spectrometric analysis .