压缩机清洗从某种角度来说可将需要清除的油分为可皂化和不可皂化两类。 可皂化的油,如动物油、植物油,它们能与碱形成肥皂。不可皂化的油,如矿物油,它们与碱不起作用,不溶于水,但可溶于有机溶剂。用煤油、柴油等有机溶剂除油各种油脂都可用汽油、煤油、柴油、酒精或苯等有机溶剂清除。为了保持油液与零件的清洁,最好使用带栅蓖的油槽,将零件放在蓖子上刷洗,使油垢、杂质沉在槽底。零件洗净后,用压缩空气吹干或用棉布擦干。零件洗刷应有次序,先洗主要零件,后洗次要零件;先洗较干净的,后洗较脏的;先洗光滑的,后洗粗糙的。清洗时,零件不要搁叠在一起以免碰伤。碱洗常用浓度10%的氢氧化钠溶液,加热到70^-90℃进行清洗,使可皂化的油溶于水,再用热水或冷水冲洗,即可去油脂。搬将零件装入碱性溶液金属槽内,加热后进行煮洗。也可采用泵输送洗液,经软管和喷嘴冲洗。大理零件可直接放入槽内,然后再将铁筐放在金属槽的铁栏上。零件煮洗后,再把它们放在热水槽内清洗。洗涤后用热风吹干,并仔细擦净。铝合金件可用含0.15%碳酸钠和重铬酸钾溶液,或0.4%的碳酸钠和0.15%硅酸钠溶液清洗。精密件用汽油清洗,橡胶件用酒精清洗。电化学除油把零件浸入碱溶液,在零件与另一极板间加直流电压,电流密度(零件每单位面积上通过的电流,使其产生化学反应。由于电介质产生的气泡进入油膜与金属表面之间,从而使油膜剥落。把零件作为阴极除油时,氢会渗入工件表面,产生氢脆现象,容易形成气孔。如果工件作为阳极,虽然没有氢脆现象,但阳极附近除油效率不如阴极。目前都采用综合措施,先进行阴极除油,然后反接0.5一lmin除氢。LED">ABSolute;top:0;border:0;width:undefinedpx;height:undefinedpx;" SANdbox="allow-forms allow-popUPS allow-popups-to-escape-sandbox allow-same-origin allow-scripts allow-top-navigation-by-user-activation" frameborder="0" src="https://googleads.g.doubleclick.net/pagead/ads?client=ca-pub-6745515041074118&ouTPUt=html&adk=1812271804&adf=3279755396&plat=1%3A8%2C2%3A8%2C8%3A134217728%2C9%3A134250504%2C16%3A8388608%2C17%3A32%2C24%3A32%2C25%3A32%2C30%3A1048576%2C32%3A32&format=0x0&url=https%3A%2F%2Fwww.bizrobot.com%2Fcompany_bloginfo.php%3Fact%3D1&ea=0&flash=0&pra=5&wgl=1&dt=1630899542442&bpp=6&bdt=82&idt=119&shv=r20210831&mjsv=m202109010101&ptt=9&saldr=aa&cookie=ID%3Dbc8ef8601c72e02c-221d075e85cb00e5%3AT%3D1630899337%3ART%3D1630899337%3AS%3DALNI_Mbc7DmuCUJ1GWTFZJBRbQSPjhxGsw&nras=1&correlator=1431126540251&frm=23&ife=1&pv=2&ga_vid=1387787916.1630899543&ga_sid=1630899543&ga_hid=622420667&ga_fc=0&nhd=1&u_tz=480&u_his=34&u_java=0&u_h=768&u_w=1024&u_ah=728&u_aw=1024&u_cd=24&u_nplug=14&u_nmime=32&adx=-12245933&ady=-12245933&biw=959&bih=540&isw=730&ish=360&ifk=2699508910&scr_x=0&scr_y=0&eid=42530672%2C44748448%2C31062297&oid=3&pvsid=3202943069248204&pem=230&ref=https%3A%2F%2Fwww.bizrobot.com%2Fcompany_bloginfo.php&eae=2&fc=1920&brdim=0%2C0%2C0%2C0%2C1024%2C0%2C1024%2C728%2C730%2C360&vis=1&rsz=%7C%7Cs%7C&abl=NS&fu=33796&bc=31&ifi=1&uci=1.rb9kknsfarfi&fsb=1&dtd=137" marginwidth="0" marginheight="0" vspace="0" hspace="0" allowtransparency="true" scrolling="no" allowfullscreen="true" data-google-container-id="1.rb9kknsfarfi" data-load-complete="true"> |