Ukugcinwa Kokuzinza Kwezibhebhe Ezishelelayo Ezindaweni Zokusebenza Ezisheshayo
Ingxenye 1: Ukuqonda Ukungazinzi Kuma-Bearings Ashelelayo Asheshayo
Ukusebenza ngesivinini esikhulu kumelela esinye sezimo ezidinga kakhulu ama-bearings ashelelayo. Njengoba isivinini sokujikeleza sanda, umkhawulo wamaphutha ekugcotshweni, ekususweni, nasekukhethweni kwezinto uncipha kakhulu. Ukungazinzi—okubonakala njengokudlidliza, ukushelela, noma ukuwa kwefilimu yoketshezi—kungaholela ekwehlulekeni kwama-bearings ngaphambi kwesikhathi, ekulimaleni kwemishini, kanye nesikhathi esibi esingahleliwe sokungasebenzi.
Ezinhlelweni ezithwala i-rotor ngesivinini esikhulu, ukuziphatha kokushelela nokushelela kwe-interfacial kusongela ngqo ukunemba kokusebenza kanye nempilo yesevisi. Ukuguga ngokweqile, ukunyuka kwezinga lokushisa endaweni, ukuguquguquka kwekheji, kanye nokuphazamiseka kokugcoba kuyizindlela zokwehluleka ezibalulekile okumele zixazululwe ngokuklama ngokucophelela, ukukhethwa kwezinto, kanye nezinqubo zokulungisa.
Kwabonjiniyela kanye nochwepheshe bokulungisa abathola ikhwalithi ephezulu amabheringi ashelelayo avela ku-CNEPEN, ukuqonda izimiso zokugcinwa kokuzinza ezindaweni ezinesivinini esikhulu kubalulekile. Lesi sihloko sihlola i-physics yokusebenza ngesivinini esikhulu, izici eziphazamisa ukuzinza kwama-sliding bearings, kanye namasu asebenzayo—kusukela ekukhetheni izinto kuya ekuqapheni isimo—aqinisekisa ukusebenza okuthembekile ngesivinini esiphezulu.
Ukushelela—ukushelela okukhulu kwezinto ezigingqikayo emigwaqweni yomjaho—kuyimbangela eyinhloko yokungazinzi kuma-bearings anejubane eliphezulu. Ukushelela kwenzeka lapho amandla okubamba phakathi kwezindawo ezithintanayo enganele ukunqoba amandla okuhudula aqinile kanye namandla angenawo amandla.
I-physics: Uma ijubane eliphezulu lokujikeleza, kokubili amandla okudonsa kanye namandla angenawo amandla ayanda. Umthwalo omncane odingekayo ukuvimbela ukushelela ukhuphuka ngesivinini. Ngesikhathi esifanayo, umthwalo ohambisana nomkhawulo wokuphila kokukhathala webhereyi uyancipha njengoba ijubane lokusebenza likhuphuka. Lokhu kudala "isifunda sokusebenza esamukelekayo" esilinganiselwe sebhereyiyi.
Ama-bearings anejubane eliphezulu asebenza ngesivinini esiphezulu kanye nemithwalo ephansi avame kakhulu ukushelela, okungaholela ekuhlulekeni ngaphambi kwesikhathi ngaphambi kwezibikezelo zokuphila kokukhathala zakudala.
Kuma-bearings ashelelayo e-hydrodynamic, ukuzinza kuncike ekwakhekeni nasekugcinweni kwefilimu yokugcoba. Ezindaweni ezinesivinini esikhulu:
Imiphumela ye-Centrifugal iba nkulu, ishintsha ukusatshalaliswa komthwalo kanye nama-engeli okuxhumana
Izinga lokushisa liyenyuka kunciphisa ukujiya kwamafutha, okusongela ukujiya kwefilimu
Vibration kungaphazamisa i-oyili, okuholela ekuxhumaneni kwensimbi nensimbi
Ukuguguleka kwe-cavitation kungenzeka ngaphansi kwezimo ezingazinzile
Ukuhlaziywa kwama-frequency abalulekile ezinhlelweni ezijikelezayo ezinama-bearings ashelelayo kudinga ukuqonda okujulile kwama-coefficient aguquguqukayo—ukuqina kanye nokufiphaza kwesendlalelo sokugcoba. Ubudlelwano phakathi kwamapharamitha e-geometric, amapharamitha okusebenza, kanye nokuqina kwesistimu buyinkimbinkimbi kodwa bubalulekile ekubikezeleni amabanga okusebenza aphephile.
Ukuqhubekela phambili kusukela ekungazinzini kuya ekwehlulekeni kuma-bearings ashelelayo asheshayo kuvame ukulandela le ndlela:
| Stage | phenomenon | Isibonakaliso Esibonakalayo |
|---|---|---|
| 1 | Ukuqala kokushelela | Ukudlidliza okwandisiwe, ukukhuphuka kwezinga lokushisa |
| 2 | Ukuphazamiseka kwefilimu yokugcoba | Izindawo ezishisayo ezitholakala endaweni ethile, umfutho kawoyela oncishisiwe |
| 3 | I-Metal-to-metal contact | Ukushaya amagoli, ukuguguleka kwemfucumfucu emafutheni |
| 4 | Ukubaleka okushisayo | Ukwenyuka kwezinga lokushisa okusheshayo |
| 5 | Ukwehluleka okuyinhlekelele | Ukubanjwa, umonakalo womgodi, ukuvalwa kwemishini |
Ukuvimbela ukuqhubekela phambili ezigabeni zakamuva kudinga kokubili ukukhethwa okufanele kwamabhereyitha kanye nokugcinwa okusebenzayo.
Ukuzinza kuma-bearings ashelelayo asheshayo kuqala ngokukhetha izinto zokwakha. Izakhiwo ezibalulekile zifaka:
| Property | Umthelela Ekusebenzeni Okusheshayo |
|---|---|
| I-friction coefficient | Ukungqubuzana okuphansi kunciphisa ukukhiqizwa kokushisa kanye nengozi yokushelela |
| Ukuqhuba kwe-thermal | Ukushisa okuphezulu kuqeda ukushisa, kugcina ifilimu kawoyela |
| Amandla anamandla | Ivimbela ukuguquguquka ngaphansi kwemithwalo enamandla |
| Gqoka ukumelana | Yandisa impilo yesevisi ngesikhathi semicimbi yokugcoba emngceleni |
| I-coefficient yokwandisa ukushisa | Ukufana nezinto zomgodi kuvimbela izinguquko zokuhlukanisa |
Amabheringi ashelelayo e-Ceramic imelela intuthuko ekuqondeni nasekuzinzeni kokushisa kwezinhlelo zokujikeleza ngesivinini esikhulu. Ngokungafani nama-bearings ajwayelekile agcotshwe ngamafutha, ama-bearings e-ceramic angasebenzisa amanzi njengesithambisi, axazulule izinselele ezivamile zokungazinzi kokushisa kuma-spindles anesivinini esikhulu. Lokhu kusungula izinto ezintsha kuthuthukisa ukusebenza kahle kanye nokuphila isikhathi eside ngenkathi kuxazululwa izinkinga ezifana nokungqubuzana, ukuguguleka, kanye nokugqwala.
Izinzuzo ezibalulekile zama-ceramic bearings zifaka:
Ukuqina okuphezulu okunciphisa ukudlidliza komshini, okuthuthukisa ukunemba kwezicelo zesivinini esikhulu
Ukuphathwa kokushisa okuphezulu: amandla okushisa aphezulu amanzi aholela ekukhuleni kwezinga lokushisa eliphansi ngesikhathi sokusebenza
Ubulukhuni obuphezulu kanye namandla amahle kakhulu okucindezela impilo yenkonzo ende
Ukumelana nokwanda kokushisa ezindaweni ezinokuguquguquka okukhulu kokushisa
Izitsha zokuzigcoba ze-CNEPEN (Uchungechunge lwe-EU) zenzelwe izinhlelo zokusebenza zesivinini esikhulu lapho ukuzinza kanye nokungqubuzana okuphansi kubaluleke kakhulu. Isakhiwo esihlanganisiwe esisekelwe ku-PTFE sinikeza:
Isekelo sensimbi sokusekela isakhiwo kanye nokuqhuba ukushisa
Isendlalelo sethusi esinomoya esihlinzeka ngokubopha ngomshini kanye nokushabalalisa ukushisa
Ingxube ye-PTFE ifakwe ku-intersice yethusi ukuze isebenze ngokushayisana okuphansi
Ngezicelo zezimoto nezimboni ezisheshayo, Ama-bearings ashelelayo e-CNEPEN kuye kwaqinisekiswa emikhakheni yezimboni engaphezu kuka-30 okuhlanganisa nezinhlelo zokusebenza zezinjini zezimoto lapho isivinini esiphezulu kanye namazinga okushisa kuyinto evamile -3Ama-bearings afana nama-connecting rod bearings, ama-main bearings, kanye nama-camshaft bushings—izingxenye ezibalulekile zenjini—azuza kubuchwepheshe bezinto ezisezingeni eliphezulu ezihlanganisa ubuqotho besakhiwo nokungqubuzana okuphansi kanye nokumelana nokuguguleka okuphezulu.
Ngezinhlelo zokusebenza ezidinga umthamo omkhulu womthwalo ohlangene nekhono lesivinini esikhulu, Amabheringi ensimbi amabili e-CNEPEN (Uchungechunge lwe-EMT) inikeza ukwakhiwa komcu wensimbi onezinto ezikhethekile zokubopha i-alloy, ezifanele umthwalo omkhulu, ukushukuma kwesivinini esiphansi kanye nokunyakaza kokujikeleza.
Inani le-PV—umkhiqizo womthwalo (P) kanye nesivinini (V)—yipharamitha ebalulekile enquma ukuthi ibhereyi ingasebenza kahle yini ngesivinini. Umklamo ngamunye webhereyi unenani eliphezulu le-PV elivunyelwe ngokusekelwe ezimpahleni zezinto zokwakha kanye nokwakhiwa kwazo.
Imininingwane yobuchwepheshe ye-CNEPEN inikeza izibalo zenani le-PV ezinemininingwane yezinhlobo ezahlukene zokunyakaza:
| Uhlobo lokunyakaza | Ukucatshangelwa Komkhawulo we-PV |
|---|---|
| Ukunyakaza okujikelezayo (isiqondiso esisodwa) | Isivinini × indawo yomthwalo / yokuthwala |
| Ukunyakaza okuguquguqukayo | I-engeli × isivinini × izici zomthwalo |
| Ukunyakaza okuphindaphindayo | I-stroke × imvamisa × izici zomthwalo |
Ukuhlolwa kobunjiniyela kwemikhawulo ye-PV kubalulekile ukuqinisekisa ukuthi ukukhetha amabhereyi akudluli imingcele yomklamo, okungaholela ngokushesha ekuwohlokeni kokushisa kanye nokungazinzi.
Kuma-bearings ashelelayo ngesivinini esikhulu, ukukhetha amafutha kuthinta kakhulu ukuzinza:
Ukukhetha kwe-viscosity kumele ilinganisele ukwesekwa komthwalo ekushiseni kanye nokuhudula okuphansi okunamandla ngesivinini
Ubudlelwano bokushisa nokuqina zidinga amafutha okugcoba agcina ukuqina kwefilimu emazingeni okushisa aphezulu
Amaphakheji engeziwe (EP, anti-wear) inikeza isivikelo somngcele ngesikhathi sokuqalisa kanye nesivinini esisheshayo
Amafutha asekelwe emanzini inikeza ukuphathwa kokushisa okuphezulu kakhulu kuzinhlelo zokusebenza zokuthwala ze-ceramic
Ukwakheka kahle kwemisele yamafutha kubalulekile ekuzinzeni okusheshayo:
Ama-grooves kufanele abekwe endaweni izindawo ezingalayishwanga ukugwema ukuphazamisa i-wedge yengcindezi ye-hydrodynamic
Umthamo owanele wokudla uwoyela kumele unikezwe ukuze kulondolozwe ukujiya kwefilimu ngaphansi kwamandla e-centrifugal
Ukucindezela kokudla kwamafutha kungadinga ukukhushulwa ngesivinini esiphezulu ukuze kunqotshwe imiphumela ye-centrifugal
Ukuze kusebenze ngesivinini esiphezulu okuzinzile, amabheringi kumele ahlale ngaphakathi kwesifunda sawo sokusebenza esamukelekayo. Lesi sifunda sinomkhawulo walokhu okulandelayo:
Umkhawulo wokukhathala (umthwalo omkhulu oqhubekayo ngesivinini esinikeziwe)
Ubuncane bomthwalo kuyadingeka ukuvimbela ukushelela (kuyanda ngesivinini)
Ukusebenza ngaphandle kwalesi sifunda—kungakhathaliseki ukuthi ngesivinini esiphezulu kakhulu somthwalo noma umthwalo ophansi kakhulu wejubane—kuyingozi yokungazinzi.
Izinga lokushisa liyisibonakaliso esithembeke kakhulu sokuqina kwamabhereyi. Izifundo zibonisa ukuthi amabhereyi ashelelayo ashesha kakhulu asebenza ngesivinini esifinyelela ku-70,800 rpm agcina amazinga okushisa azinzile ngaphansi kuka-97°C uma eklanywe kahle futhi egcotshwe kahle. Imikhuba ebalulekile yokuqapha:
| Ipharamitha | I-Action Threshold | Umkhawulo Wengozi |
|---|---|---|
| Izinga lokushisa liyenyuka | 15°C ngaphezu kwesisekelo esijwayelekile | 20°C ngaphezu kwesisekelo |
| Izinga lokushisa eliphelele | 85°C (kugcotshwe ngamafutha) | 95 ° C |
| Izinga lokushisa lokushintsha | >5°C/min | Phenya ngokushesha |
Ukuqapha ukudlidliza kunikeza isixwayiso kusenesikhathi sokungazinzi. Ezinhlelweni zokuthwala isivinini esikhulu:
Izinzwa eziseduze kuma-shafts thola ukunyakaza okuhlobene
I-Accelerometers ezindlini kulinganisa amandla okudlidliza
Ukuhlaziywa kwe-frequency spectrum ikhomba imithombo ethile yokudlidliza
Izibalo zemvamisa ezibucayi nquma izimo zomsindo
Ngezinhlelo zokusebenza ezisheshayo lapho ukufinyelela kokulungisa kulinganiselwe, Izitsha zokugcoba ze-CNEPEN ezizigcobayo inikeza inzuzo yokusebenza ngaphandle kokulungiswa, okususa ingozi yokungazinzi okuhlobene nokugcotshwa okwenzeka lapho kungaphumeleli izikhawu zokulungiswa noma ukugcotshwa kusetshenziswa ngendlela engafanele.
Ama-spindle aqondile adinga ukuzinza okumangalisayo. Ama-bearings ashelelayo e-ceramic ane-lubrication yamanzi avela njengesixazululo sezinhlelo zokusebenza ze-spindle ezisheshayo nezinembile. Izinzuzo zazo:
Ukuqina okuphezulu kunciphisa ukudlidliza komshini
Ukugcotshwa kwamanzi kunikeza ukuphathwa kokushisa okuphezulu
Ukumelana nokugqwala kudlula amabheringi ensimbi ezindaweni zamanzi
Amabheringi enjini yezimoto abhekene nokucindezeleka okukhulu, amazinga okushisa aphezulu, kanye nokunyakaza okusheshayo. Ama-bearings ashelelayo e-CNEPEN Zenzelwe ngokunemba ukuhlanganiswa okubalulekile okujikelezayo, okuhlanganisa ama-bearings enduku yokuxhuma, ama-bearings amakhulu, kanye nama-bushings e-camshaft. Lezi zinhlelo zokusebenza zidinga:
Amandla okukhathala angavamile kanye nokuhambisana nakho
Ubukhulu obuhle befilimu kawoyela ukuze kujikelezwe kahle nangokuqhubekayo
Ukunciphisa ukungqubuzana ukuze kuthuthukiswe ukusebenza kahle kukaphethiloli
Ama-planet bearings anejubane eliphezulu kuma-gearbox e-wind turbine asebenza ngaphansi kwesivinini esiguquguqukayo kanye nemithwalo, okwenza kube lula ukushelela. Ukuthola amaphutha kudinga ukuqonda okuphelele kokuziphatha kokudlidliza. Amasu okulungisa ukuzinza afaka:
Ukuqinisekisa umthwalo omncane ukuze kuvinjelwe ukushelela ebangeni lesivinini
Ukuqapha isimo ukuze kutholakale ukugqwala kusenesikhathi
Izindlela zokulingisa ezithuthukisiwe zokubikezela ukushelela ngaphansi kwezimo eziguquguqukayo
Ngaphambi kokusebenza ngesivinini esikhulu, qinisekisa:
Isikhala sokuthwala ngaphakathi kwencazelo (ububanzi be-shaft obuyi-1.5–2.0 thousandths yemiklamo ye-hydrodynamic)
Ukusebenza kohlelo lokugcoba nokuhlanza amafutha
Umfutho wokudla kawoyela owanele isivinini sokusebenza
Ukulungiswa kweshafti kanye nendlu kulungile
Ama-bearings amasha noma athathelwe indawo adinga ukusebenza kahle:
Sebenza ngesivinini esijwayelekile esingu-50–60% amahora angu-2–4
Khulisa kancane kancane isivinini nomthwalo
Gada izinga lokushisa nokudlidliza kuyo yonke indawo
Shintsha uwoyela ngemva kokusebenzisa uwoyela okokuqala ukuze ususe udoti ogugile
Ukuze kube nokuzinza okuqhubekayo:
Ukuhlaziywa kwamafutha okuvamile (ukugcwala, ukungcola, izinsimbi ezigugile)
Ukuqapha izitayela zokushisa
Ukulandelela isignesha yokudlidliza
Ukuhlolwa okubonakalayo ngesikhathi sokuphumula okuhleliwe
Isayensi yezinto ezibonakalayo, ukuphathwa kwezinga lokushisa, ubunjiniyela bokugcoba, kanye nokulandelela isimo kumele kucatshangelwe ngokucophelela ukuze kugcinwe isivinini esikhulu. ama-sliding bearings ezizinzile. Ezimbonini zokwakha, zezimayini, zasemanzini, kanye nezokuzenzakalela, ukuthembeka kwemishini kuncike ekukhetheni izixazululo ezifanele zokuthwala umthwalo womsebenzi. Lapho amaqembu okuthenga esebenza nabaphakeli abanolwazi, angathola ukufinyelela kolwazi lobuchwepheshe olubasiza ukuthi benze izinqumo ezinhle kakhulu mayelana nemininingwane yezingxenye ngenkathi begcina izindleko ziphansi kuyo yonke impilo yabo. Njengoba isivinini kanye nemithwalo yemishini yezimboni iqhubeka ikhuphuka, icindezela imikhawulo yalokho engakwenza, ubuchwepheshe bokuthwala umthwalo buqhubeka buthuthuka ngezinto ezintsha kanye namathuluzi okulungisa okuvimbela ukugcina izimpahla ezibalulekile ziphephile.
Izikhathi zokuhlola zincike ekutheni uhlelo lokusebenza lubi kangakanani nokuthi lungaqashwa kahle kangakanani. Uma imishini inokulandelela okuqhubekayo kokudlidliza nokushisa, izinqubo zokuhlola ngokomzimba zingase zihlehliswe njalo ezinyangeni ezintathu. Ngakolunye uhlangothi, imishini engenazo izinsimbi kufanele ihlolwe ngokubonakalayo kanye ngenyanga. Imishini yokwakha esindayo esebenza ezimweni ezinzima idinga ukulungiswa njalo kunezinhlelo zokwenza izinto ngokuzenzakalela zezimboni ezigcinwa ngaphakathi. Ukusetha amaphethini ajwayelekile okudlidliza ngesikhathi sokusebenza kukuvumela ukuthi wenze ukuhlaziywa kwezitayela okuthola ukuhlukahluka okudinga ukunakwa okwengeziwe ngaphambi kokuba kubangele ukwehluleka.
Imisindo engavamile, njengemisindo yokugaya noma yokuklinya, isho ukuthi i-lube iyaphuka noma indawo yonakele, okudingeka ihlolwe ngokushesha. Uma izinga lokushisa lokusebenza liphezulu kunokujwayelekile ngo-20°F noma ngaphezulu, kusho ukuthi izinkinga zokungqubuzana noma zokupholisa seziqala ukubonakala. Izingcezu zensimbi ezingabonakala kumasampula okugcoba zibonisa ukuthi izinqubo zokuguguleka ziyaqhubeka futhi zisheshisa inqubo yokwehluleka. Amazinga aphezulu okuzamazama ezindaweni zokuthwala ayisibonakaliso sokufakwa kwezikhala noma ukungalingani okuqala ukwakheka. Lapho lezi zimpawu zixazululwa ngokushesha, izinkinga ezincane azibi zimbi futhi zibangele ukwehluleka okukhulu okumisa ukukhiqizwa.
Ukufaneleka kwezinga lokushisa kuncike ekukhetheni kwezinto zokwakha kanye nohlobo lwamafutha. Ukusetshenziswa okungaphezu kuka-300°F, udinga izinto zokugcoba eziqinile noma uketshezi lokwenziwa oluklanyelwe ukuzinza ekushiseni, kanye nethusi elixutshwe ne-graphite noma i-ceramics. Amafutha anomswakama ophansi agcina izinto zihamba kahle kanye nezinto ezinganciphisi kakhulu lapho zishiswa ziyadingeka e-Arctic ngaphansi kuka-40°F. Imiklamo ekhethekile yokuthwala ingabhekana kahle nalezi zinto ezibucayi uma ichazwe kahle. Kodwa-ke, kubalulekile ukukhuluma nonjiniyela bezinhlelo zokusebenza ukuqinisekisa ukuthi bayahambisana nezimo zakho zokusebenza ezihlukile.
Ngemikhiqizo ehlukahlukene kanye nezinsizakalo zokusekela ochwepheshe, i-Jiashan Epen Bearing Co., Ltd. ikulungele ukuhlangabezana nazo zonke izidingo zakho zokuthwala ngesivinini esikhulu. Senza ama-bearing e-composite ensimbi-plastiki, imiklamo ye-bimetallic, kanye nama-wear plate akhethekile asetshenziswa emishini yokwakha, imishini yezimayini, izimoto zasemanzini, kanye nezinhlelo zokwenza izinto zezimboni. Sakha kokubili osayizi abajwayelekile bekhathalogi kanye nezixazululo ezenzelwe ukuhambisana nezidingo zemisebenzi ethile. Ithimba lethu locwaningo lihlaziya izidingo zakho futhi lisikisela izinto ezizothuthukisa ukusebenza kanye nempilo yesevisi, kungakhathaliseki ukuthi udinga ukushintshwa ukuze kulungiswe ngokushesha noma ufuna umenzi we-sliding bearing ozosebenza naye njalo. Xhumana nathi ku- epen@cnepen.cn ukuxoxa ngezidingo zakho ezithile nokuthola izingcaphuno zobuchwepheshe zephrojekthi yakho elandelayo.
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Neale, MJ (2018). Incwadi Yezincwadi Ze-Tribology, Izincwadi Zobunjiniyela zaseButterworth-Heinemann, Uhlelo Lwesine.
I-American Bearing Manufacturers Association (2020). Izilinganiso Zomthwalo Ongacacile kanye Nezindlela Zokubikezela Ukuphila, I-ABMA Standard 12.1-2020.
I-Hutchings, i-IM kanye ne-Shipway, P. (2017). I-Tribology: Ukungqubuzana Nokuguguleka Kwezinto Zobunjiniyela, eButterworth-Heinemann, Uhlelo Lwesibili.
Inhlangano Yabachwepheshe Bezinhlu Zokudla kanye Nonjiniyela Bokugcoba (2019). Ukuqapha Isimo Semishini Emisebenzini Engashintshi, Iphepha Lobuchwepheshe le-STLE SP-64.
UDkt. Eleanor "Ellie" Penn
UDkt. Eleanor "Ellie" Penn unguchwepheshe wethu Omkhulu We-Tribology e-Epen, lapho evala khona igebe phakathi kwesayensi yezinto ezijulile nezinselele zobunjiniyela bomhlaba wangempela. Njengoba eseneminyaka engaphezu kwengu-15 yokuhlangenwe nakho emkhakheni wama-sliding bearings nezinto ezizigcobayo, unothando lokuxazulula izinkinga eziyinkimbinkimbi kakhulu zokungqubuzana, ukuguga, nokunakekelwa. U-Ellie uneziqu ze-Ph.D. kuMechanical Engineering egxile ku-tribology. Umgomo wakhe uwukunikeza amandla onjiniyela nochwepheshe bezokulungisa ngolwazi olusebenzayo kanye nemikhuba engcono kakhulu eyandisa impilo yemishini, ukunciphisa isikhathi sokuphumula, kanye nokuqhuba ukusungula izinto ezintsha. Uma engekho elebhu noma ebhala, ungamthola evolontiya kuma-workshops e-STEM ukuze akhuthaze isizukulwane esilandelayo sonjiniyela. Izindawo Zobungcweti: Idizayini Ye-Sliding Bearing, Ukukhethwa Kwezinto Ezibalulekile, Ukuhlaziya Ukwehluleka, Ukugcinwa Kokuvikela, Ubunjiniyela Bohlelo.
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