液壓系統(tǒng)油品NAS污染等級(jí)介紹

1、1、NAS1638污染度等級(jí)dOOmL油中允許粒子數(shù))NAS等級(jí)不同粒子直徑(pm)允許的個(gè)數(shù)5-1515 2525 5050 100100150089163121,000178326132,0002566311244,00071212622458,0001,425253458616,0002,8505069016732,0005,7001,01218032864,00011,4002,025360649128,00022,8004,05072012810256,00045,6008,1001:44025611512,00091,20016,2002,880512121.024,000182,

2、40032,4005,7601,024132,048,000364,80064,80011,5202,050NAS1638等級(jí)標(biāo)準(zhǔn)限定各類液壓系統(tǒng)汕液允許的污染度等級(jí)。目前國外制造出廠的液壓系統(tǒng)，開始使川時(shí)的油液污染度等級(jí)都控制在NAS7級(jí)以上， 當(dāng)使用后降到NAS9級(jí)時(shí)，液壓系統(tǒng)一般不會(huì)出現(xiàn)故障，當(dāng)污染度等級(jí)降到NAS1O11 液壓系統(tǒng)會(huì)偶爾出現(xiàn)故障。當(dāng)油液的污染度等級(jí)降到NAS12級(jí)以下時(shí)， 則會(huì)經(jīng)常出現(xiàn)故障，此時(shí)必須對(duì)液壓油進(jìn)行循環(huán)過濾。NAS等級(jí)NAS等級(jí)(National Aerospace Standard 1638) NAS等級(jí)是測(cè)量液壓油污染程度的普遍彩用標(biāo)準(zhǔn)。利用以下圖表，比

3、較污染粒子之個(gè)數(shù)，便可訂定液壓油的污染等級(jí).污染等級(jí)00級(jí)0級(jí)1級(jí)2級(jí)3級(jí)4級(jí)5級(jí)6級(jí)7級(jí)8級(jí)9級(jí)10級(jí)11級(jí)12級(jí)污5-15p12.525050010002000400080001600032000640001280002560005120001024000染大 小15-25.2244891783367121425285057001140022800456009120018240025-50.4816326312625350610122025405081001620032400用數(shù)量50-100.123611224590180360720144028805760100.以上00112481632641282565121024液壓油清潔度ISO標(biāo)準(zhǔn)及NAS 1638標(biāo)準(zhǔn)對(duì)照表ISO Code NAS 1638 TOC o 1-5 h z 19/161018/15917/14816/1