噪声与振动控制
譟聲與振動控製
조성여진동공제
NOISE AND VIBRATION CONTROL
2014年
6期
157-160
,共4页
振动与波%混凝土泵车%异响%故障诊断%分动箱
振動與波%混凝土泵車%異響%故障診斷%分動箱
진동여파%혼응토빙차%이향%고장진단%분동상
vibration and wave%concrete pump%abnormal noise%fault diagnosis%transfer case
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NJ1028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。
為找到某型混凝土泵車底盤齣現異響的原因，首先對異常車進行振動和譟聲測試，判斷底盤異響來源于分動箱。其次，對分動箱振動時域及頻域信號進行分析併結閤軸承缺陷的特徵頻率，判定異響原因為支承分動箱輸齣軸的NJ1028軸承內滾道缺陷。最後，對軸承內滾道缺陷形態及分動箱裝配流程進行分析，找齣軸承齣現缺陷的原因，提齣併實施相應的改進措施後至今一年多來未再接到類似的故障反饋。
위조도모형혼응토빙차저반출현이향적원인，수선대이상차진행진동화조성측시，판단저반이향래원우분동상。기차，대분동상진동시역급빈역신호진행분석병결합축승결함적특정빈솔，판정이향원인위지승분동상수출축적NJ1028축승내곤도결함。최후，대축승내곤도결함형태급분동상장배류정진행분석，조출축승출현결함적원인，제출병실시상응적개진조시후지금일년다래미재접도유사적고장반궤。
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.
