WETIEN电磁溢流阀DBW10B/DBW10A/DBW20B/液压电磁溢t流阀DB
液压系统的过滤
过滤在液压系统中是必不可少的,因爲它是控制油液污染的一个重要手段。通过过滤,可防止切屑和其他污染粒子的侵入,并清除液压系统中已有的或不断産生的污染颗粒和磨损颗粒,维持液压元件所允许的污染程度(污染敏感度)。当前研制各种类型的高教精密滤油器和探求特佳的过滤方式,以较低的总费用提供保证元件有足够防护能力的低过滤级已成爲过滤方面的重要话题。
液压系统清洗与过滤的几点说明
①过滤时如能增大过滤面积,反而经济;单独设置过滤回路,清洗效果较好;回路中安装加热器,可以提高清洗效果。
一般情况下,爲了进行有效清洗,可采用增加油温、增加流量、用低黏度油、用高比重油、用脉冲液流和使用系统作振动冲洗等措施。小流量室温下清洗时,一般效果较差。
②粗滤油器与精滤油器串联组合很不经济。
③系统中对污染敏感高的元件(如伺服元件),最好能装设辅助过滤器,或单独卸下专门清洗。
④冲洗过程中还应该注意:油箱要封闭,减少现场空气中颗粒进入油箱的机会;向油箱中加入冲洗油时应使用带过滤器的加油小车,以滤除桶装油中的污染物;更换滤芯时暂停冲洗泵,注意不要带人杂质;对排空和排污要定期进行,以确保系统充满,并及时排出气和污染物;在冲洗的前期,油中水分蒸发很重要,在冲洗油箱上应有蒸汽逸出的窗口;冲洗台格后再抽出冲洗油、管线。使用前要注意保护,以免污染物进入系统。
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