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1981年2、3月间,我段东风型机车接连发生二起后变速箱从动轴7608止推轴承烧损的故障。一起是机车架修后水阻试验时,发现后变速箱温度很高,试验后解体发现从动轴伞齿轮侧的7608止推轴承严重烧损,轴承内外套破裂变形、保持架破碎、滚动体熔化,轴端烧成锥形。时隔不久,另一台机车架修后仅运行7000多公里也发生了类似的故障。这种故障在我段以前也时有发生。
In 1981 and March 1981, I Dongfeng locomotive occurred two consecutive after the gearbox driven shaft 7608 thrust bearing burning failure. Together is the locomotive frame repair water resistance test, found that the rear gearbox temperature is high, after the disintegration of the test found that the driven shaft bevel gear 7608 thrust bearing serious burning, bearing jacket rupture deformation, cage broken, rolling Body melting, shaft end firing cone. A short while later, a similar failure occurred in another locomotive frame that had been repaired only for more than 7,000 kilometers. This kind of trouble happened before my time.