柴油发电机控制箱振动故障诊断  

Fault diagnosis for vibration of a diesel generator control box

作　　者：付艳恕[1] 黄菊花[1] 张庭芳[1] 杨雪春[1] 何成宏[1] 

机构地区：[1]南昌大学机电工程学院,南昌330031

出　　处：《振动与冲击》2010年第10期153-156,共4页Journal of Vibration and Shock

基　　金：江西省重大战略产品项目(2008006)

摘　　要：利用实验测试与数值分析对柴油发电机控制箱内电子元器件振动故障进行研究。测试结果表明机组正常运转阶段控制箱关键点产生的振动较为平稳,无振动过载现象。据此推测控制箱内仪表故障的强烈振动主要发生于启动、停机阶段。利用Ansys有限元分析对机组0Hz～50Hz范围振型进行计算。结果表明机组多阶振型频率处于0Hz～50Hz范围,其中三个振型给控制箱造成较大的振动位移,相应的振动加速度远大于重力加速度,可能造成了严重的过载。过载力完全可能导致控制箱内仪器、仪表引脚连接失效。最后指出动力机械控制元件抗过载能力必须加以考虑。Electronic component vibration fault in control box of a diesel generator was analyzed by experimental test and numerical simulation.Experimental results showed that the key point vibration amplitude of the control box is small when the diesel generator works at its normal rotational speed,there isn't overload;so the strong vibration inducing faults may happen during diesel generator starting or shutdown.Then,the finite element model of vibration was established by using Ansys software to calculate the modal shapes in frequency range of 0~50Hz.Studies showed that several modal frequencies are in the range of 0~50 Hz,three sympathetic vibrations of the control box happen and their displacements are larger than those of experimental test;the corresponding accelerations are also much larger than gravity acceleration,maybe induce serious overload.So connecting pins of electronic components may be torn by the overload force.After analyzing,it could be concluded that the anti-overload ability of electronic components must be taken into account.

关 键 词：柴油发电机 电子元器件 振动频率 过载 

分 类 号：TK427[动力工程及工程热物理—动力机械及工程]