基于时频分析及阶比跟踪的曲轴轴承故障诊断研究

程利军;张英堂;李志宁;任国全;梅检民

振动与冲击 ›› 2012, Vol. 31 ›› Issue (19) : 73-78.

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PDF(3025 KB)
振动与冲击 ›› 2012, Vol. 31 ›› Issue (19) : 73-78.
论文

基于时频分析及阶比跟踪的曲轴轴承故障诊断研究

  • 程利军,张英堂,李志宁,任国全,梅检民
作者信息 +

Research on fault diagnose of main bearing based on time-frequency analysis and order tracking

  • CHENG Li-jun, ZHANG Ying-tang, LI Zhi-ning, REN Guo-quan, MEI jian-min
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文章历史 +

摘要

针对发动机曲轴轴承磨损故障诊断中测取的机体振动信号非平稳、频率成分随转速变化的规律不明确等特点,将时频分析及阶比跟踪算法应用于故障诊断中。在匀速及加速工况下分别将曲轴轴承间隙调节为0.08、0.2及0.4mm后采集机体振动信号,结合同步采集的转速信号及外卡油压信号对振动信号进行时频分析和阶比跟踪后发现,振动信号存在明显的108阶比成分和2600~3100Hz频带成分。随着曲轴轴承间隙的增大,108阶比成分有增强的趋势,而2600~3100Hz频带成分有减弱的趋势。对加速工况下上述两部分信号成分提取参数发现,曲轴轴承正常、轻微及严重磨损工况的参数分别分布在0.0027、0.0100及0.0350附近,提取的参数能有效的区分出这些工况。

Abstract

In the engine’s main bearing fault diagnose, the vibration signal is nonstationary and the law of frequency changing with rotate speed is not clear. So the time-frequency analysis and order tracking was put forward to diagnose the fault. At speed up and 1800r/min speed condition, after set the bearing clearance to 0.08, 0.2 and 0.4mm, the vibration signal’ time-frequency distribution and order was analyzed combined with speed and oil pressure signal, and find there are obvious 108 order component and 2600~3100Hz frequency component. At speed up condition, while the main bearing clearance augments, the 108 order component augment and the 2600~3100Hz frequency component descends. After get parameter of these two signal component at speed up condition, we find that the parameter under main bearing’s normal, gentle and serious wear condition is distributed near 0.0025、0.0100 and 0.0350, the parameter can efficiently distinguish these conditions.

关键词

内燃机 / 故障诊断 / Gabor变换 / 阶比跟踪 / 磨损 / 轴承

Key words

IC engine / fault diagnose / Gabor transform / order tracking / wear / bearing

引用本文

导出引用
程利军;张英堂;李志宁;任国全;梅检民. 基于时频分析及阶比跟踪的曲轴轴承故障诊断研究[J]. 振动与冲击, 2012, 31(19): 73-78
CHENG Li-jun;ZHANG Ying-tang;LI Zhi-ning;REN Guo-quan;MEI jian-min. Research on fault diagnose of main bearing based on time-frequency analysis and order tracking[J]. Journal of Vibration and Shock, 2012, 31(19): 73-78

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