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我露天煤矿有多台930E型矿用自卸车,其载质量为260t,主要用于运输大型电动挖掘机从地表剥离下来的泥土和岩石。1台该型号自卸车使用2年后,其厢斗大梁损坏。我们对损坏原因进行分析,根据分析结果实施修复和改进。1.损坏原因该自卸车厢斗底部设有2个箱型大梁,大梁内部设有筋板。大梁损坏部位主要是其两侧底板出现变形、开裂,如图1所示。我们分析损坏原因有设计、使用和维修等3个方面,如下所述。
I have several opencast mines 930E mining dump truck with a payload of 260t, mainly used to transport large electric excavators peeled off from the surface of the earth and rocks. 1 Taiwan This type of dump truck after 2 years of use, the bucket beam damage. We analyze the causes of the damage and implement the repair and improvement based on the analysis results. 1. Causes of damage The dump truck at the bottom of the box has two box girders, girders with ribs inside. Damaged parts of the girder is mainly deformed on both sides of the bottom plate, cracking, shown in Figure 1. We analyze the causes of damage are three aspects of design, use and maintenance, as described below.