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自开办农机调剂市场以后,一些旧柴油机渐渐进入交易场所,其优劣的鉴别方法主要是试机。具体检查步骤是: 1.摇转曲轴,使喷油嘴供油,如喷油嘴发出清脆的声音,则说明喷油嘴和柱塞副性能尚好;如齿轮室内无哗哗声等异常声响,则说明齿轮的磨损不严重。 2.上下扳动飞轮,如无响声,无动感觉,则说明曲轴主轴颈与轴瓦之间的间隙不大。然后扳转飞轮,使活塞接近下止点,左右晃动飞轮,如无嗒嗒声,则说明连杆轴颈与瓦之间的磨损不严重。 3.使气缸减压,摇转曲轴,当去除减压时,如活塞的反弹力大,飞轮迅速回转,则说明气缸套、活塞、活塞环的磨损程度小。在摇转曲轴时,机油压力表的指针应不低于1或机油指示红标能很快升起,手下压费力。
Since the opening of the agricultural machinery swap market, some old diesel engines gradually entered the trading floor, and its advantages and disadvantages of the identification method are mainly test machines. The specific inspection steps are: 1. Shake the crankshaft so that the fuel supply nozzle, such as the nozzle emits crisp sound, then the injector and plunger performance is still good; such as gear room no sound such as abnormal noise, The gear wear is not serious. 2. Fly up and down the flywheel, such as no sound, no sense of movement, then the crankshaft main journal and the bearing gap between the small. Then pull the flywheel so that the piston approaches bottom dead center and sway the flywheel from left to right. If there is no click, the wear between the connecting rod journal and the shoe is not serious. 3. Decompression of the cylinder, crank crankshaft, when the removal of decompression, such as the piston rebound force, flywheel rapid rotation, then the cylinder liner, piston, piston ring wear a small extent. When cranking the crankshaft, the gauge of the oil pressure gauge should not be lower than 1 or the red indicator of the oil can rise quickly, and the pressure of the hand under pressure.