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摘要: 应用振动监测技术, 对EQ6100-1型发动机连杆轴瓦与曲柄销间隙故障进行模拟, 分析振动响应与故障特征变化关系, 从振动信号中提取反映偶件故障的特征参数, 选择适当的数学模型描述特征参数随偶件状态的变化规律, 实现对发动机滑动轴承间隙故障的定量诊断。试验结果表明: 故障系数和连杆轴瓦与曲柄销间隙的关系是显著的, 相关曲线为多项式回归曲线, 其复相关系数接近1, 说明采用振动信号进行发动机滑动轴承间隙故障诊断在实践上是可行的。Abstract: In order to implement the quantitative diagnosis of engine sliding bearing failure, a simulation experiment on the relationship between the clearance of connecting rod bearings and their failures for EQ6100-1 model engine was conducted by using vibration monitoring technique, some characteristic parameters reflecting the failures of coupling parts were acquired from vibration signals, and a mathematic model was selected to properly describe the variation rules of the parameters with the change of coupling parts' conditions. Experiment result shows that the correlativity between failure coefficients and the clearance is prominent, their relative curves is polynomial regression curves, and their correlation coefficient approaches 1. It is obvious that the quantitative diagnosis method of engine sliding bearing failure by utilizing engine vibration signals is feasible.
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Key words:
- automobile engineering /
- engine /
- failure /
- diagnosis
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图 3 间隙正常状态下的振动响应功率谱
Figure 3. Vibration response power spectrums under normal clearance state
图 4 间隙异常状态下的振动响应功率谱
Figure 4. Vibration response power spectrums under abnormal clearance state
表 1 试验方案
Table 1. Test scheme
mm 故障原因 配合程度 技术状态 代表符号 数值 连杆轴瓦与曲柄销的磨损 δ1 0.091 正常间隙 δ2 0.200 中度间隙 δ3 0.320 严重磨损 
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表 2 不同状态下的功率谱值
Table 2. Values of power spectrums under different conditions
间隙状态 频带总功率/kHz 频带功率谱密度最大幅值/kHz 1.0~1.4 1.8~2.8 1.0~1.4 1.8~2.8 间隙正常 P0=1 490 P0=16 950 A0=28.74 A0=114.91 工作状态δ3 P1=4 917 P1=21 950 A1=63.51 A1=123.77 断火状态δ3 P2=2 199 P2=11 600 A2=20.34 A2=81.46
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表 3 异响诊断仪测试结果
Table 3. Measuring result of hetero-sound diagnostic instrument
频率/Hz 电压/mV 连杆轴承故障情况下 连杆轴承正常情况下 第6缸 第4缸 第6缸 第4缸 400 1.5 1.5 1.5 1.5 700 1.9 1.8 1.8 1.8 1 200 3.3 2.6 2.3 2.1 1 800 3.2 2.5 2.6 2.5 2 600 4.3 3.5 3.5 3.0
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表 4 测量结果
Table 4. Measure result
参数 间隙状态 δ1 δ2 δ3 1.00±0.08 1.43±0.07 2.22±0.10 1.00±0.06 2.01±0.08 3.32±0.10
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表 5 定量诊断阈值
Table 5. Threshold values of quantitative diagnosis
参数 状态 正常 中度故障 严重故障 SA < 1.12 1.12~1.64 > 1.64 SP < 1.36 1.36~2.25 > 2.25
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表 6 回归数据
Table 6. Regression data
参数 间隙状态 δ1 δ2 δ3 1 2 3 1 2 3 1 2 3 SA 0.91 0.99 1.10 1.32 1.45 1.48 2.12 2.21 2.33 SP 0.90 1.01 1.09 1.93 1.99 2.11 3.21 3.30 3.45
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[1] Martin W. Stockel Auto Mechanics Fundamentals[M]. Illinois: The Goodheart-Willcox Publisher, 1988. [2] 贾继德, 孔凡让, 刘永斌, 等. 发动机连杆轴承故障噪声诊断研究[J]. 农业机械学报, 2005, 36 (6): 87-91. https://www.cnki.com.cn/Article/CJFDTOTAL-NYJX200506023.htmJia Ji-de, Kong Fan-rang, Liu Yong-bin, et al. Noise diagnosis research based on wavelet packet and fuzzy c-clusters about connecting rod bearing fault[J]. Transactions of the Chinese Society for Agricultural Machinery, 2005, 36 (6): 87-91. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-NYJX200506023.htm [3] 王江萍. 机械设备故障诊断技术及应用[M]. 西安: 西北工业大学出版社, 2001. [4] 钟秉林. 机械故障诊断学[M]. 北京: 机械工业出版社, 2000. [5] 郑海波, 李志远, 陈心昭, 等. 基于时频分布的发动机异响特征分析及故障诊断研究[J]. 内燃机学报, 2002, 20 (3): 267-272. https://www.cnki.com.cn/Article/CJFDTOTAL-NRJX200203015.htmZheng Hai-bo, Li Zhi-yuan, Chen Xin-zhao, et al. Engine knock signature analysis and fault diagnosis based on time-frequency distribution[J]. Transactions of Csice, 2002, 20 (3): 267-272. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-NRJX200203015.htm [6] 邝朴生. 现代机器故障诊断学[M]. 北京: 农业出版社, 1991. [7] 周轶尘. 发动机振动的传递特性的研究和应用[J]. 武汉水运工程学院学报, 1988, 12 (1): 11-17. https://www.cnki.com.cn/Article/CJFDTOTAL-JTKJ198801002.htmZhou Yi-chen. Study and application of vibration transfer features of engines[J]. Journal of Wuhan University of Water Transportation Engineering, 1988, 12 (1): 11-17. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-JTKJ198801002.htm [8] 刘忠文. 故障状态系数及其应用[J]. 武汉水运工程学院学报, 1988, 12 (4): 59-62. https://www.cnki.com.cn/Article/CJFDTOTAL-JTKJ198804008.htmLiu Zhong-wen. Fault state coefficients and its application[J]. Journal of Wuhan University of Water Transportation Engineering, 1988, 12 (4): 59-62. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-JTKJ198804008.htm [9] 费业泰. 误差理论与数据处理[M]. 北京: 机械工业出版社, 2004. [10] 吕琛, 王桂增. 基于时频域模型的噪声故障诊断[J]. 振动与冲击, 2005, 24 (2): 54-57. https://www.cnki.com.cn/Article/CJFDTOTAL-ZDCJ20050200G.htmLu Chen, Wang Gui-zeng. Noise fault diagnosis based on time-frequency domain model[J]. Journal of Vibration and Shock, 2005, 24 (2): 54-57. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZDCJ20050200G.htm [11] 王平福, 毕李格, 哈里德, 等. 电喷发动机转速传感器信号波形试验[J]. 长安大学学报: 自然科学版, 2005, 25 (6): 73-77. https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL200506017.htmWang Ping-fu, Bilegn, Halide, et al. Engine speed sensor signal waveforms experiment[J]. Journal of Chan'an University: Natrual Science Edition, 2005, 25 (6): 73-77. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-XAGL200506017.htm [12] 王登峰, 刘学广, 刘宗巍, 等. 车内自适应有源消声系统次级声源布放试验[J]. 中国公路学报, 2006, 19 (3): 122-126. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGGL200603022.htmWang Deng-feng, Liu Xue-guang, Liu Zong-wei, et al. Layout experiment of secondary sound source for adaptive active noise control systemin vehicle interior[J]. China Journal of Highway and Transport, 2006, 19 (3): 122-126. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZGGL200603022.htm [13] 徐志胜, 翟婉明. 高速铁路板式轨道结构参数对轮轨噪声的影响[J]. 交通运输工程学报, 2006, 6 (4): 23-26. http://transport.chd.edu.cn/article/id/200604006Xu Zhi-sheng, Zhai Wan-ming. Structure parameter influence of slab track for high speed rail way on wheel-rail noise[J]. Journal of Traffic and Transportation Engineering, 2006, 6 (4): 23-26. (in Chinese) http://transport.chd.edu.cn/article/id/200604006 -
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