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在内燃机车运用和修理实践中,柴油机-发电机组和辅助装置各种部件中滚动轴承的损坏情况是常有的。要不拆卸查明带有伤损轴承的部件,相当复杂。为此,日麦林卡机务段采用了一种仪器,其外形如图1,作用原理如图2。由图可以看出,仪器是一个用两个晶体管T1和T2组成的两级放大器。为了使微音器很小的内阻抗同放大器的输入电阻匹配,微音器M发出的信号不送给基极电路,而是送给晶体
In diesel locomotive operation and repair practices, the breakdown of rolling bearings in various components of diesel-generator sets and auxiliary devices is common. It is quite complicated to disassemble parts with damaged bearings. To this end, Jimei Linke locomotive depot using an instrument, the appearance of Figure 1, the role of principle in Figure 2. It can be seen from the figure that the instrument is a two-stage amplifier composed of two transistors T1 and T2. In order to make the tiny internal impedance of the microphone match the input resistance of the amplifier, the signal from the microphone M is not sent to the base circuit but to the crystal