论文部分内容阅读
在液压传动系统中,液压油不仅起动力传递作用,也起润滑及冷却作用,还对腐蚀和锈蚀起抑制作用。然而,所有的液压系统都存在污染问题,污染的程度因系统的功能、组成及使用环境不同而异。据统计资料,液压系统及元件的故障有70％～80%是由于液压油污染造成的。有关文献指出,我国一些矿用采煤机液压系统中的液压油的污染度达到NSA标准20级左右,致使系统中的元件如:泵、马达及控制阀等造成严重磨损及报废。 为了保持液压系统的清洁度,通常采用过滤的办法来实现,使油液的污染度低于可能引起故障的级别。能够正确判定的方法就是借助于适当的仪器和技术。
In the hydraulic transmission system, hydraulic oil not only acts as a power transmission, but also acts as a lubricant and a cooling agent, and also suppresses corrosion and corrosion. However, all hydraulic systems have pollution problems, and the degree of contamination varies depending on the function, composition, and use environment of the system. According to statistics, 70% to 80% of hydraulic system and component failures are caused by hydraulic oil contamination. Relevant literature points out that the pollution degree of hydraulic oil in hydraulic systems of some mine shearers in China reaches about 20 grades of the NSA standard, resulting in serious wear and scrap of components in the system such as pumps, motors and control valves. In order to maintain the cleanliness of the hydraulic system, filtration methods are usually used to make the degree of contamination of the oil lower than the level that may cause failure. The method that can be correctly judged is by means of appropriate instruments and techniques.