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现在很多液压系统中 ,油箱上的人孔大多采用金属闷盖的形式。这样 ,油箱内的液面波动情况、回油冲击情况、是否有气雾或气泡产生等情况则很难直接观测到。特别是液压泵置于油箱内的立式液压系统 ,液压泵的吸油状况、液压泵出口泄漏情况等则更是难以直接观测到 ,这些都给系统的
Now many hydraulic systems, the manhole on the tank mostly in the form of metal boring cover. In this way, the tank of the liquid level fluctuations, oil return shock situation, whether there is an aerosol or bubble generation is difficult to directly observed. In particular, hydraulic pumps placed in the vertical hydraulic system within the tank, the hydraulic pump suction condition, the hydraulic pump outlet leakage is more difficult to directly observe these are the system