在以油为介质的液压系统中,水是一种很严重的污染。至今对这种污染还很难识别,并缺少了解,消除它也是很困难的。在多数情况下,由水所引起的故障往往被归咎于其他因素。水常常和别的污染物一起对油液和元件产生复合破坏。过去,过滤用来分离液压系统中的固体污染物。最近二十年来,液压工业在液压设备的固体污染物过滤方面已取得了大的进步。近来清除水的过滤器的出现,必将进一步改变液压传动的污染控制。 In oil-based hydraulic systems, water is a serious contamination. So far the pollution is still hard to identify, and lack of understanding, it is also very difficult to eliminate. In most cases, problems caused by water are often attributed to other factors. Water and other contaminants often cause compound damage to fluids and components. In the past, filtration was used to separate solid contaminants from hydraulic systems. In the last two decades, the hydraulic industry has made great strides in filtering solid contaminants in hydraulic equipment. The recent removal of water filter, will further change the hydraulic transmission pollution control.