摘要
气门间隙故障作为应急柴油发电机组(EDG)的典型故障,容易导致性能下降、机械故障等,传统人工拆盖检查气门间隙的方式费时费力。利用Teager能量算子的瞬态振动识别能力,结合振动冲击能量变化规律,提出了一种基于能量算子梯度邻域的振动冲击始点自适应精确提取的EDG气门间隙故障在线诊断方法,该方法的故障识别参考阈值为EDG设计参数。在一台12缸V型柴油机上进行实验验证,结果表明该方法能够有效诊断气门故障,同时具备追踪气门间隙的能力。研究成果为EDG在线监测诊断提供了新途径。
Valve clearance fault was a typical EDG faul that might lead to degradation in performance,mechanical faults,et al.The traditional methods of manually unpacking and checking the valve clearance were time-consuming and laborious.Using the transient vibration identification ability of Teager energy operator and the variation law of vibration shock energy,an online diagnostic method was proposed for valve clearance faults in EDG based on k-th maxima on Teager energy operator gradient(k-TEOG)adaptive and accurate extraction of vibration shock starting points.The reference thresholds of fault recognition herein were EDG design parameters.Experiments on a 12-cylinder V-type diesel engine show that the proposed method may effectively diagnose valve failure and has the ability to track valve clearance.The research provides an effective new way for EDG online monitoring and diagnosis.
作者
江志农
王子嘉
张进杰
黄翼飞
茆志伟
JIANG Zhinong;WANG Zijia;ZHANG Jinjie;Huang Yifei;MAO Zhiwei(Beijing Key Laboratory of High-end Mechanical Equipment Health Monitoring and Self-Recovery,Beijing University of Chemical Technology,Beijing,100029;Key Laboratory of Engine Health Monitoring-Control and Networking of Ministry of Education,Beijing University of Chemical Technology,Beijing,100029;Beijing Bohua Anchuang Technology Co.,Ltd.,Beijing,101399)
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2021年第5期617-623,共7页
China Mechanical Engineering
基金
国家重点研发计划(2016YFF0203305)
中央高校基本科研业务费专项资金(JD1912/ZY1940)
双一流建设专项经费(ZD1601)。
关键词
应急柴油发电机组
气门间隙故障
冲击识别
振动特征提取
emergency diesel generator(EDG)
valve clearance fault
shock identification
vibration feature extraction
作者简介
江志农,男,1967年生,教授、博士研究生导师,研究方向为关键设备故障监测诊断与性能分析等,E-mail:jiangzhinong@263.net;通信作者:茆志伟,男,1990年生,博士后研究人员,研究方向为柴油机监测诊断与健康评估,E-mail:maozw1990@126.com。
