Ukugcotshwa kwamafutha ngokuvamile kufaneleka ukusetshenziswa ngesivinini esiphansi kuya kwesiphakathi lapho izinga lokushisa lokusebenza le-bearing lingaphansi kwezinga lokushisa elilinganiselwe lamafutha. Akukho grisi yokugoba elwa nokungqubuzana efanelekela zonke izinhlelo zokusebenza. Igrisi ngayinye inokusebenza okulinganiselwe kanye nezici zayo. Igrisi iqukethe uwoyela oyisisekelo, i-thickener kanye nezithasiselo. Igrisi yokugoba ivame ukuba namafutha oyisisekelo kaphethiloli aqiniswe ngensipho ethile yensimbi. Eminyakeni yamuva nje, izithasiselo eziphilayo nezingaphili ziye zangezwa kumafutha oyisisekelo okwenziwa. Ithebula 26 lifingqa ukwakheka kwamafutha ajwayelekile. Ithebula 26. Izithako ze-Grease Base Oil Thickener Additive Grease Mineral Oil Synthetic Hydrocarbon Ester Substance Perfluorinated Oil Silicone Lithium, Aluminium, Barium, Calcium kanye neCompound Soap Izinhlayiya ezingakhiqizi phunga (ezingaphili) Iglue (ubumba), i-carbon black, i-silica gel, i-PTFE soap-free (organic) polyurea compound rust inhibitor dye tackifier metal passivator antioxidant anti-wear extreme pressure additive calcium-based and aluminium-based greases anokumelana okuhle kwamanzi, Afanele ukusetshenziswa kwezimboni ezidinga ukuvimbela ukungena komswakama. Ama-grease asekelwe ku-lithium anezisetshenziswa eziningi futhi afanele ukusetshenziswa kwezimboni kanye nama-bearings angama-wheel-end.
Amafutha esisekelo okwenziwa, njenge-esters, ama-esters e-organic kanye nama-silicone, uma esetshenziswa nama-thickeners asetshenziswa njalo kanye nezithasiselo, izinga lokushisa eliphezulu lokusebenza livame ukuba phezulu kunezinga lokushisa eliphezulu lokusebenza lamafutha asekelwe ku-petroleum. Ububanzi bokushisa bokusebenza bamafutha okwenziwa bungaba kusuka ku--73°C kuya ku-288°C. Okulandelayo yizimpawu ezijwayelekile zama-thickeners asetshenziswa njalo ngamafutha asekelwe ku-petroleum. Ithebula 27. Izici ezijwayelekile zama-thickeners asetshenziswa ngamafutha asekelwe ku-petroleum Ama-Thickeners Ajwayelekile Indawo Yokuphonsa Izinga Lokushisa Eliphezulu Ukumelana Namanzi Ukusebenzisa ama-thickeners kuThebula 27 ngamafutha okwenziwa e-hydrocarbon noma e-ester, izinga lokushisa eliphezulu lokusebenza lingafinyelelwa Khulisa cishe ngo-10°C.
°C °F °C °F
I-Lithium 193 380 121 250 enhle
I-Lithium complex 260+ 500+ 149 300 okuhle
Isisekelo se-aluminium esihlanganisiwe 249 480 149 300 esihle kakhulu
I-calcium sulfonate 299 570 177 350 inhle kakhulu
I-Polyurea 260 500 149 300 Kuhle
Ukusetshenziswa kwe-polyurea njengesithako sokujiya kungenye yentuthuko ebaluleke kakhulu emkhakheni wokugcoba iminyaka engaphezu kwengu-30. I-polyurea grease ikhombisa ukusebenza okuhle kakhulu ezinhlotsheni ezahlukene zokufaka ama-bearing, futhi ngesikhathi esifushane, iye yaqashelwa njenge-pre-lubricant ethwala ibhola. Izinga lokushisa eliphansi Ngaphansi kwezimo zokushisa eziphansi, i-torque yokuqala yama-bearing agcotshwe ngamafutha ibaluleke kakhulu. Amanye ama-grease angasebenza ngokujwayelekile kuphela lapho i-bearing isebenza, kodwa izobangela ukumelana okukhulu ekuqaleni kwe-bearing. Kweminye imishini emincane, ingase ingaqali lapho izinga lokushisa liphansi kakhulu. Endaweni enjalo yokusebenza, kuyadingeka ukuthi i-grease ibe nezici zokuqala izinga lokushisa eliphansi. Uma izinga lokushisa lokusebenza libanzi, i-grease yokwenziwa inezinzuzo ezisobala. I-grease isengenza i-torque yokuqala nokusebenza ibe yincane kakhulu ekushiseni okuphansi okungu--73°C. Kwezinye izimo, la ma-grease asebenza kangcono kune-lubricants kulokhu. Iphuzu elibalulekile mayelana ne-grease ukuthi i-torque yokuqala akuyona ngempela umsebenzi wokuqina kwe-grease noma ukusebenza okuphelele. I-torque yokuqala ifana nomsebenzi wokusebenza komuntu ngamunye we-grease ethile, futhi kunqunywa ulwazi.
Izinga lokushisa eliphezulu: Umkhawulo wokushisa okuphezulu kwamafutha anamuhla ngokuvamile uwumsebenzi ophelele wokuzinza kokushisa kanye nokumelana nokushiswa kwamafutha ayisisekelo kanye nokusebenza kahle kwezithibi zokushisa. Izinga lokushisa lamafutha linqunywa iphuzu lokuwa kwe-grease thickener kanye nokwakheka kwamafutha ayisisekelo. Ithebula 28 libonisa izinga lokushisa lamafutha ngaphansi kwezimo ezahlukahlukene zamafutha ayisisekelo. Ngemva kweminyaka eminingi yokuhlolwa ngama-bearings agcotshwe ngamafutha, izindlela zalo zokuhlola zibonisa ukuthi impilo yamafutha okugcoba izoncishiswa ngesigamu ngokukhuphuka ngakunye kwezinga lokushisa elingu-10°C. Isibonelo, uma impilo yenkonzo yamafutha ekushiseni okungu-90°C ingamahora angu-2000, lapho izinga lokushisa lenyuka laya ku-100°C, impilo yenkonzo incishiswa yaya cishe emahoreni ayi-1000. Ngokuphambene nalokho, ngemva kokwehlisa izinga lokushisa laya ku-80°C, impilo yenkonzo kulindeleke ukuthi ifike emahoreni angu-4000.
Isikhathi sokuthunyelwe: Juni-08-2020