某型混凝土泵车异响故障诊断.pdfVIP

第34 卷 第6 期 噪 声 与 振 动 控 制 Vol 34 No.6 2014 年12月 NOISE AND VIBRATION CONTROL Dec. 2014 文章编号：1006-1355(2014)06-0157-04 某型混凝土泵车异响故障诊断 刘永红 ，卢立秀，邓习树 （三一集团有限公司，长沙 410100 ） 摘 要：为找到某型混凝土泵车底盘出现异响的原因，首先对异常车进行振动和噪声测试，判断底盘异响来源于分 动箱。其次，对分动箱振动时域及频域信号进行分析并结合轴承缺陷的特征频率，判定异响原因为支承分动箱输出轴 的NJ 1028轴承内滚道缺陷。最后，对轴承内滚道缺陷形态及分动箱装配流程进行分析，找出轴承出现缺陷的原因，提 出并实施相应的改进措施后至今一年多来未再接到类似的故障反馈。 关键词：振动与波；混凝土泵车；异响；故障诊断；分动箱 中图分类号：TB53 文献标识码：A DOI 编码：10.3969/j.issn. 1006-1335.2014.06.035 Abnormal Noise Fault Diagnosis of a Concrete Pump Truck LIU Yong-hong , LU Li-xiu , DENG Xi-shu ( Sany Group Co. Ltd., Changsha 410100, China ) AbstractAbstract : In order to find the cause of the abnormal noise from the chassis of a concrete pump truck, the vibration and noise of the abnormal concrete pump truck were tested firstly. It was estimated that the abnormal noise came from the transfer case of the truck. Secondly, the vibration signals in time domain and frequency domain from the transfer case were analyzed. According to the frequency characteristics of the defected bearings, the fault in the inner track of NJ 1028 bearing, which supports the export axes, was identified. Then, the configuration of the fault in the inner track and the assembly process of the transfer case were analyzed, and the reason which induces this kind of fault was found. Finally, relevant improvement was proposed and carried out, and its effectiveness was verified. KeyKey wordswords : vibration and wave ; concrete pump ; abnormal noise ; fault diagnosis ; transfer case 汽车底盘异响是指汽车在行驶时传动系