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1故障现象我公司开发的WB2300型路面冷再生机,下线后启动时,分动箱透气塞出现喷油现象,并且喷出油量很多,致使整车无法正常行驶及工作。2故障分析该机的分动箱装在发动机飞轮壳上,液压泵装在分动箱上,见图1。分动箱外形如图2所示。拆下分动箱上的透气塞,看到其正下方为齿轮,无挡油板。故障分析:整机启动时,齿轮转动带动油液上升到透气塞内,齿轮带给油液的运动惯性使透气塞腔内油液受压,齿轮高速旋转,引起透气塞腔内油
1 Symptom The WB2300 pavement cold reclaiming machine developed by our company started to blow off when there was a blowout plug in the transfer case and a lot of oil was sprayed so that the vehicle could not drive and work normally. 2 Fault Analysis The machine’s transfer case mounted on the engine flywheel housing, hydraulic pump mounted on the transfer case, shown in Figure 1. Transfer case shape shown in Figure 2. Remove the breathable plug on the transfer case and see the gear just below it. Failure Analysis: When the machine starts, the gear rotates to bring the fluid up to the breathable plug. The inertia of the gear brings the fluid in the breathable plug cavity to be pressurized. The gear rotates at a high speed, causing the breathable plug cavity oil