在内燃机车运用和修理实践中,柴油发电机设备和辅助装置各种部件中的滚动轴承损坏的情况是常有的。要不拆卸而查明带有伤损轴承的部件是相当复杂的。为此,日麦林卡机务段采用了一种仪器,其外形如图1,原理图如图2。由示图可以看出,仪器是一个用两个晶体管T_1和T_2组成的两级放大器。为了使微音 In the practice of diesel locomotive operation and repair, the rolling bearing damage in various components of diesel generator equipment and auxiliary equipment is common. To disassemble and identify parts with a damaged bearing is rather complicated. To this end, Jimei Linke locomotive depot using an instrument, the appearance of Figure 1, the schematic diagram in Figure 2. It can be seen from the diagram that the instrument is a two-stage amplifier composed of two transistors T_1 and T_2. In order to make micro-tone