Roj lubrication feem ntau haum rau cov ntawv thov qis mus rau nruab nrab qhov kev ua haujlwm kub ntawm cov kabmob yog qis dua cov roj qhov ntsuas kub.Tsis muaj kev sib txhuam los tiv thaiv cov roj yog haum rau txhua daim ntawv thov.Txhua roj tsuas muaj kev ua haujlwm tsawg thiab cov yam ntxwv.Roj muaj cov roj hauv paus, thickener thiab additives.Cov kabmob roj feem ntau muaj cov roj av hauv paus roj thickened nrog ib co tshuaj xab npum hlau.Nyob rau hauv xyoo tas los no, cov organic thiab inorganic thickeners tau ntxiv rau cov roj hluavtaws hluavtaws.Table 26 qhia txog qhov muaj pes tsawg leeg ntawm cov roj uas raug.Table 26. Cov khoom xyaw ntawm Grease Base Oil Thickener Additive Grease Mineral Oil Synthetic Hydrocarbon Ester Substance Perfluorinated Oil Silicone Lithium, Aluminium, Barium, Calcium thiab Compound Soap Unscented (inorganic) particles Glue (av nplaum), carbon dub, silica gel, PTFE soap-free (organic) polyurea compound xeb inhibitor dye tackifier hlau passivator antioxidant anti-hnav hnyav hnyav additive calcium-based thiab aluminium-based greases muaj cov dej tsis zoo, Tsim nyog rau cov ntawv thov kev lag luam uas xav tau los tiv thaiv kev ya raws.Lithium-based roj muaj ntau yam kev siv thiab tsim nyog rau kev lag luam siv thiab lub log-kawg bearings.
Synthetic base oils, xws li esters, organic esters thiab silicones, thaum lawv siv nrog cov nquag siv thickeners thiab additives, qhov siab tshaj plaws kev khiav hauj lwm kub yog feem ntau siab tshaj qhov siab tshaj plaws kev khiav hauj lwm kub ntawm roj av-raws li roj.Kev khiav hauj lwm kub ntawm cov roj hluavtaws tuaj yeem yog los ntawm -73 ° C txog 288 ° C.Cov hauv qab no yog cov yam ntxwv dav dav ntawm cov thickeners feem ntau siv nrog cov roj av-raws li cov roj.Table 27. Cov yam ntxwv dav dav ntawm cov thickeners siv nrog roj av-raws li cov roj Thickeners Hom Dropping Point Maximum Temperature Water Resistance Siv cov thickeners nyob rau hauv Table 27 nrog hluavtaws hydrocarbon los yog ester-based roj, qhov siab tshaj plaws kev khiav hauj lwm kub yuav tsum tau nce li ntawm 10 ° C.
° C ° F ° C ° F
Lithium 193 380 121 250 zoo
Lithium complex 260+ 500+ 149 300 zoo
Composite aluminium puag 249 480 149 300 zoo heev
Calcium sulfonate 299 570 177 350 zoo heev
Polyurea 260 500 149 300 Zoo
Kev siv polyurea ua cov thickener yog ib qho tseem ceeb tshaj plaws nyob rau hauv lub lubricating teb rau ntau tshaj 30 xyoo.Polyurea roj qhia tau hais tias kev ua tau zoo hauv ntau yam kev siv cov kabmob, thiab nyob rau lub sijhawm luv luv, tau dhau los lees paub tias yog lub pob kabmob ua ntej lubricant.Tsis tshua muaj kub Nyob rau hauv qis kub tej yam kev mob, qhov pib torque ntawm roj lubricated bearings yog ib qho tseem ceeb heev.Qee cov roj tsuas tuaj yeem ua haujlwm ib txwm thaum cov kabmob khiav, tab sis nws yuav ua rau muaj kev tiv thaiv ntau dhau rau qhov pib ntawm cov kabmob.Hauv qee lub tshuab me me, nws yuav tsis pib thaum qhov kub thiab txias qis heev.Nyob rau hauv xws li ib qho chaw ua hauj lwm, nws yuav tsum tau hais tias cov roj muaj cov yam ntxwv ntawm tsis tshua muaj kub pib.Yog hais tias qhov kev khiav hauj lwm kub ntau yog dav, hluavtaws roj muaj cuab kev zoo.Cov roj tseem tuaj yeem ua rau pib thiab khiav lub zog me me ntawm qhov kub ntawm -73 ° C.Qee zaum, cov roj no ua tau zoo dua li cov roj nplua nyeem hauv qhov no.Lub ntsiab lus tseem ceeb ntawm cov roj yog qhov pib lub zog tsis tas yuav tsum ua haujlwm ntawm cov roj sib xws lossis kev ua haujlwm tag nrho.Pib torque yog ntau dua li ib qho kev ua haujlwm ntawm tus neeg ua haujlwm ntawm cov roj tshwj xeeb, thiab nws yog txiav txim siab los ntawm kev paub dhau los.
Qhov kub thiab txias: Qhov kub thiab txias txwv ntawm cov roj niaj hnub no feem ntau yog kev ua haujlwm ntawm thermal stability thiab oxidation tsis kam ntawm cov roj hauv paus thiab cov txiaj ntsig ntawm oxidation inhibitors.Qhov ntsuas kub ntawm cov roj yog txiav txim siab los ntawm qhov poob qis ntawm cov roj thickener thiab muaj pes tsawg leeg ntawm cov roj hauv paus.Table 28 qhia qhov kub thiab txias ntawm cov roj nyob rau hauv ntau yam hauv paus roj.Tom qab xyoo ntawm kev sim nrog roj-lubricated bearings, nws txoj kev qhia pom tau hais tias lub roj lubricating lub neej yuav raug txo qis rau txhua qhov kub ntawm 10 ° C.Piv txwv li, yog tias qhov kev pab cuam lub neej ntawm cov roj ntawm qhov kub ntawm 90 ° C yog 2000 teev, thaum kub nce mus txog 100 ° C, lub neej kev pab cuam yuav txo mus rau kwv yees li 1000 teev.Hloov pauv, tom qab txo qhov kub mus rau 80 ° C, lub neej kev pabcuam yuav tsum ncav cuag 4000 teev.
Post lub sij hawm: Jun-08-2020