油液取樣方法(GB/T 17489-1998 )

在對液(ye)(ye)(ye)(ye)(ye)(ye)壓系(xi)(xi)統(tong)(tong)油(you)(you)液(ye)(ye)(ye)(ye)(ye)(ye)進行污(wu)染度(du)分析(xi)時(shi),不僅要(yao)求所取(qu)(qu)(qu)(qu)的(de)樣(yang)(yang)液(ye)(ye)(ye)(ye)(ye)(ye)能(neng)夠代表整(zheng)個液(ye)(ye)(ye)(ye)(ye)(ye)壓系(xi)(xi)統(tong)(tong)油(you)(you)液(ye)(ye)(ye)(ye)(ye)(ye)的(de)污(wu)染狀況,而且要(yao)求取(qu)(qu)(qu)(qu)樣(yang)(yang)過(guo)程(cheng)不被污(wu)染。GB/T 17489— 1998《液(ye)(ye)(ye)(ye)(ye)(ye)壓顆(ke)粒污(wu)染分析(xi)從(cong)(cong)(cong)工(gong)(gong)作(zuo)系(xi)(xi)統(tong)(tong)管(guan)(guan)路中(zhong)提(ti)(ti)取(qu)(qu)(qu)(qu)液(ye)(ye)(ye)(ye)(ye)(ye)樣(yang)(yang)》等同采用(yong)ISO 4021:1992 ( Hydraulic fluid power-Particulatecont amination analy sis-Ex t raction of fluid samples fromlines of an operating sy stem)，規(gui)定了從(cong)(cong)(cong)正(zheng)在工(gong)(gong)作(zuo)的(de)液(ye)(ye)(ye)(ye)(ye)(ye)壓傳動系(xi)(xi)統(tong)(tong)中(zhong)提(ti)(ti)取(qu)(qu)(qu)(qu)樣(yang)(yang)液(ye)(ye)(ye)(ye)(ye)(ye)的(de)程(cheng)序。取(qu)(qu)(qu)(qu)樣(yang)(yang)的(de)最佳方法是用(yong)一(yi)個合(he)適(shi)的(de)取(qu)(qu)(qu)(qu)樣(yang)(yang)裝置從(cong)(cong)(cong)正(zheng)在工(gong)(gong)作(zuo)的(de)液(ye)(ye)(ye)(ye)(ye)(ye)壓系(xi)(xi)統(tong)(tong)中(zhong)存在著紊流狀態的(de)一(yi)段主油(you)(you)液(ye)(ye)(ye)(ye)(ye)(ye)管(guan)(guan)路中(zhong)提(ti)(ti)取(qu)(qu)(qu)(qu)樣(yang)(yang)液(ye)(ye)(ye)(ye)(ye)(ye)。當(dang)一(yi)個取(qu)(qu)(qu)(qu)樣(yang)(yang)裝置無法直接配裝于(yu)系(xi)(xi)統(tong)(tong)時(shi),可以從(cong)(cong)(cong)該系(xi)(xi)統(tong)(tong)油(you)(you)箱中(zhong)提(ti)(ti)取(qu)(qu)(qu)(qu)樣(yang)(yang)液(ye)(ye)(ye)(ye)(ye)(ye)。

管路(lu)取樣的步(bu)驟如(ru)下:

(1)用(yong)清潔液清洗外露(lu)接口,裝(zhuang)(zhuang)(zhuang)上取(qu)(qu)樣(yang)裝(zhuang)(zhuang)(zhuang)置(zhi);(2）打(da)開球閥,收集樣(yang)液前至少讓 500 mL的液體流(liu)經取(qu)(qu)樣(yang)裝(zhuang)(zhuang)(zhuang)置(zhi),用(yong)于沖洗取(qu)(qu)樣(yang)裝(zhuang)(zhuang)(zhuang)置(zhi)內部;

(3)不用擰動(dong)球閥，取(qu)(qu)(qu)下預先(xian)(xian)凈化(hua)的(de)取(qu)(qu)(qu)樣(yang)(yang)瓶的(de)蓋子,用取(qu)(qu)(qu)樣(yang)(yang)瓶接取(qu)(qu)(qu)樣(yang)(yang)液(ye),當取(qu)(qu)(qu)樣(yang)(yang)瓶內樣(yang)(yang)液(ye)達到(dao)其容積(ji)的(de)75%時(shi),先(xian)(xian)移開取(qu)(qu)(qu)樣(yang)(yang)瓶,立即(ji)蓋上瓶蓋并關(guan)閉(bi)球閥。