发动机曲轴摩擦转矩监控系统优化  

Optimization of a Friction Torque Monitoring System for Engine Assembly

作　　者：刘雨薇[1] 叶福浩 陈浩 LIU Yu-wei;YE Fu-hao;CHEN Hao(School of Mechanical Electronic&Information Engineering,China University of Mining and Technology,Beijing 100083,China;Huawei Machine Co.,Ltd.,Dongguan Guangdong 523808,China)

机构地区：[1]中国矿业大学(北京)机电与信息工程学院,北京100083 [2]华为机器有限公司,广东东莞523808

出　　处：《组合机床与自动化加工技术》2020年第3期95-98,102,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：清华大学摩擦学国家重点实验室开放基金(SKLTKF18B06);中央高校基本科研业务费专项基金(2016QJ05)。

摘　　要：针对人工判定发动机曲轴摩擦转矩存在可信度低的问题,文章设计了曲轴摩擦转矩的监控系统,包括设备与发动机配合的夹持适配机构、监测硬件和程序。通过对曲轴摩擦转矩进行分段监测,同时基于6 Sigma原则来设定和优化摩擦转矩监控阈值,实现对摩擦转矩的准确监测,摩擦转矩真实反映摩擦副的配合状态。通过异物试验验证优化后的摩擦转矩检测系统对异常发动机筛选的合理性和有效性。试验表明,夹持适配机构使摩擦转矩监控系统工作稳定,监测程序分为2个阶段设置,且基于6 Sigma原则来优化摩擦监控阈值能够很好满足使用要求。Since it is not stable to measure the friction torque of crankshaft by manual,the monitoring system of friction torque is designed,including the adaptors,hardware and software.The paper presents an engineering method to separate the friction torque measurement into starting phase and stable phase,and get the reasonable threshold based on 6 sigma principle,thus the friction torque value reflects the status of the crankshaft and its’bearings.In addition,through the foreign matter test,the rationality and validity of the optimized friction torque detection system are proved.The experiments are taken to prove that the new adaptor make the system work stable,and the two monitoring phases thresholds satisfied the operating requirements based on 6 sigma optimization.

关 键 词：汽车发动机 曲轴连杆机构 摩擦转矩 6 SIGMA 

分 类 号：TH165[机械工程—机械制造及自动化] TG659[金属学及工艺—金属切削加工及机床]