Uma abantu abaningi bezwa 'isihlalo se-valve', babona ucezu lwensimbi olulula, olumise okwedonadi. Iphutha lokuqala lelo. Eqinisweni, iwukuxhumana okubucayi, umnakekeli ozinikelayo kumjikelezo wokushisa nokucindezela kwegumbi elivuthayo. Inselele yangempela akukhona nje ukwenza eyodwa; kwenza lowo osinda esihogweni esithile esiklanyelwe sona. Ngibone ukwehluleka okuningi kulandelwa emuva ekuyiphatheni njengengxenye yempahla.
I-Conundrum Yezinto Ezibalulekile: Akuyona Nje Insimbi
Awukwazi ukuvele ukhethe into eshadini elijwayelekile. A isihlalo se-valve ngoba i-compressor yegesi yemvelo ibhekene nesitha esihluke ngokuphelele kunesisodwa esisenjini kaphethiloli evuselelayo. Isihlalo se-compressor yegesi silwa negesi eyomile eqhubekayo, enengcindezi ephezulu, okuholela endleleni eyingqayizivele yokugqoka esasiyibiza ngokuthi i-guttering. Lapha, insimbi eqinile ingase ivele iqhekeke ngaphansi komthelela oqhubekayo. Lokhu sikufunde kabuhlungu ekubuyiseleni imali yasensimini eminyakeni edlule.
Yilapho umuzwa we-Foundry efana ne-Qingdao Qiangsenyuan Technology Co., Ltd. (QSY) uba obonakalayo. Ngeminyaka engamashumi amathathu ekulingeni nasekukhiqizeni imishini, abavele bathengisile ama-alloys; baqonda izimo. Umsebenzi wabo ngama-alloys asekelwe ku-cobalt kanye ne-nickel awuwona owezemfundo. Ngesevisi enzima—cabanga ngezinjini zamafutha amakhulu noma imijaho esebenza kahle kakhulu—lezi zingxubevange ezikhethekile aziyona into ewubukhazikhazi; bawukuphela kwenketho. Ezisekelwe ku-cobalt, nokumelana kwazo nokushisa ngokwemvelo nokugqwala, zizishumeka ekhanda lesilinda, zakha isibopho esihlala njalo esimelana nokuwohloka komnotho ngokungafani nalutho.
Iphutha ukucacisa insimbi engagqwali futhi ukubiza usuku. Iliphi ibanga? I-440C inikezela ukumelana nokugqokwa okuhle kodwa bukela ukuqina kwayo emazingeni okushisa aphezulu. Izihlalo ze-Inconel zinhle kakhulu kuma-valve okukhipha amandla kuzinhlelo zokusebenza ezine-turbocharged, kodwa izindleko zomshini ziyisici sangempela. Ukuhwebelana okungaguquki: izindleko, ukusebenza kahle, ukuguquguquka kwe-thermal, nobulukhuni. Ayikho impendulo yomhlaba wonke.
Ukukhiqiza: Lapho Ithiyori Ihlangana Ne-Lathe
Ngisho ne-alloy ephelele, umsebenzi usuphelile. Umzila wokukhiqiza ubeka ukusebenza. Ngikholelwa ngokuqinile ekukhiqizeni okuhlanganisiwe kwezingxenye ezibalulekile ezifana nalezi. Ukubunjwa kwesikhunta seShell noma ukutshala imali okuvela kuchwepheshe ofana ne-QSY kunikeza isiqalo esikhulu. Kungani? Ngoba uthola ingxenye yomumo oseduze nenetha enesakhiwo sokusanhlamvu esiphezulu nokuminyana kwempahla uma kuqhathaniswa nengxenye emshinini osuka kusitoko sebha elejwayelekile. Okwe-a isihlalo se-valve, ubuqotho bangaphakathi buyikho konke—akukho porosity efihliwe evunyelwe.
Bese kulandela imishini. Yilapho ukunemba kuhlukanisa khona isihlalo esihle nesihlulekile. Ukugxila kobuso bokuvala, ukunemba kwama-engeli alingana okuphazamisayo—lezi akuzona nje izinombolo ezikumdwebo. Ukwehluka kwezingxenye eziyishumi ezimbalwa kungaholela ekudluliselweni kokushisa okungekuhle, kubangele izindawo ezishisayo kanye nokushiswa kwamavalvu ekugcineni. Ngikhumbula iqoqo lapho uhlelo lwe-CNC lube nephutha elincane lendlela yamathuluzi, okuholele ekushintshaneni okuncane kwe-chamfer. Kubangele ukushisa okweqile kwendawo kanye nokwehluleka ngaphambi kwesikhathi kumayunithi ayishumi nambili. Udeveli ukule mininingwane emincane kakhulu.
Inqubo yabo, kusukela ekubunjweni okulawulwayo kuye kokugcina kwemishini ye-CNC ngaphansi kophahla olulodwa, inciphisa lokhu okuguquguqukayo. Ivumela ukulawula okuqinile kuyo yonke i-geometry ebucayi—ubuso obuphezulu, i-engeli yokuvala engu-45-degree (noma ngezinye izikhathi engu-30-degree), kanye nobubanzi obungaphandle obulungiselelwa ukufaka umshini. Awuthengi nje ingxenye; uthenga uchungechunge lwenqubo olulawulwayo.
I-Saga Efanelekayo: Cindezela, Phola, kanye Nethemba
Nali iqiniso elivame ukugajwa: eliphelele isihlalo se-valve kungonakalisa ngesikhathi sokufakwa. Ukulingana kokuphazamiseka akuxoxiswana ngakho. Iqinisekisa ukuzinza kwesakhiwo futhi, ngokubaluleke kakhulu, ukuqhutshwa kokushisa ekhanda le-cylinder. Kodwa ukuyifaka ngesando ngomshayeli ojwayelekile kuyindlela yokwenza imifantu emincane noma ukuhlanekezela.
Indlela efanele ihlanganisa ukupholisa isihlalo (ngokuvamile nge-nitrogen eyi-liquid) ukuze sinciphe, futhi ngezinye izikhathi ukushisa ikhanda ukuze kwandiswe isibhobo. Lokhu kuvumela ukufakwa okubushelelezi, okulingana ngokucindezela ngaphandle kwamandla anonya. Ngike ngabona ochwepheshe beqa ukupholisa umoya ngenxa yokuthi ilingana ngokwanele, ukuze isihlalo sikhululeke ngemva kwamahora angu-50 okusebenza. Umjikelezo wokushisa uthola bonke ubuthakathaka kulokho kufanelana.
Ake sikhulume ngama-counterbores. Isikhwama sesihlalo esisekhanda kufanele sihlanzeke ngendlela efanele futhi senziwe ngomshini ngokunembile. Noma iyiphi imfucumfucu, uwoyela, noma ukungapheleli kusebenza njengesivikelo, kudala umgoqo wokushisa. Isihlalo sishisa kakhulu, i-valve ishisa ngokweqile, futhi uthola ukwehluleka kwakudala kokutubeka. Kuzwakala kuyisisekelo, kodwa ezitolo zokwakha kabusha, lesi sinyathelo yilapho u-30% wokwehluleka uvela khona.
Ukuhlaziya Ukwehluleka: Ukufunda Indaba Ensimbi
Igugile noma ihlulekile isihlalo se-valve umbiko wezobunhloli. Ukubhoboza ebusweni obuvaliwe? Lokho kuvame ukushisela okuncane kanye nokudabula, okukhomba ekugcobiseni okunganele (ezinjinini ezithatha indawo kaphethiloli omthofu) noma ukungezwani kwezinto phakathi kwesihlalo nobuso bevalvu. Isihlalo esibanzi, esihlehlisiwe siwuphawu lwakudala lwento ethambile kakhulu uma isetshenziswa—igxivizwa ekhanda.
Imifantu yeradial evela kububanzi obungaphakathi? Lokho kuvame ukukhathala okushisayo, kusukela emijikelezweni yokushisisa nokupholisa ngokushesha. Ikutshela ukuthi ukumelana nokushaqeka kwe-thermal akwanele, noma ukudluliswa kokushisa ekhanda kusengozini (kubuyela kulokho kungena kahle noma i-counterbore engcolile). Kwesinye isikhathi, ubona ukushintsha kombala okuxakile, okunamabala—lokho i-oxidation kanye nokuhlaselwa kwamakhemikhali okuvela ezithasiselweni zikaphethiloli ezinolaka noma imikhiqizo evuthayo, ekhalela ingxubevange emelana nokugqwala njengebanga elithile elisekelwe ku-nickel.
Lokhu akukona ukubonwa kwezemfundo. Bakwazisa ngokuqondile ukucaciswa okulandelayo. Ukubona ukuqhekeka kokukhathala okushisayo kusho ukuthi ukuphindaphinda okulandelayo kungase kudinge ukusuka kunsimbi evamile ukuya kungxube yethusi efakwe ngethusi ukuze kuqhutshekwe ne-thermal conductivity engcono, noma mhlawumbe ukushintshela ku-vacuum-ncibilikisiwe ukuze uthole ukuhlanzeka okukhulu namandla okukhathala.
Ngale Kwesihlalo: Ukubuka Kwesistimu
Awukwazi ukuhlukanisa isihlalo. Iyingxenye yesistimu: i-valve (impahla yayo kanye nokunameka), ingcindezi yasentwasahlobo, isimo somhlahlandlela, ikhwalithi yamafutha, kanye nezinga lokushisa lenjini. Isihlalo esiphelele esinobuso be-stellite sisazohluleka uma umhlahlandlela we-valve ugugile, okubangela ukuvuza kwe-valve stem seal kanye nokukhokhwa. Kungumbono ophelele.
Kungakho ukubambisana nomkhiqizi othola isithombe esikhulu kubalulekile. Uma ubheka iphothifoliyo yenkampani njengale eku-tsingtaocnc.com, ethatha amashumi eminyaka kusukela ekulingiseni kuya ekwenzeni imishini enembile, iphakamisa ukuqonda kwalesi simiso sezinto eziphilayo. Abagcini nje ngokukhipha izindandatho; bahlinzeka ngengxenye okufanele iphile endaweni enobutha, encike komunye. Ukukhethwa kwengxube ye-cobalt ngaphezu kwensimbi eshibhile akuyona into ethengiswayo; yisixazululo senkinga yokudlulisa ukushisa okuhlelekile.
Ekugcineni, ukucacisa isihlalo se-valve kuwumsebenzi we-application physics kanye ne-metallurgy ebonakalayo. Kumayelana nokubuza imibuzo efanele: Athini amafutha? Uyini umjikelezo womsebenzi? Angakanani amandla okupholisa? Impendulo ayiyona nje inombolo eyingxenye. Kuwubizo lokwahlulela, olwesekwa yisipiliyoni futhi, ngokungananazi, ukwehluleka okumbalwa okudlule okwafundisa izifundo ezinzima. Umgomo uwukwenza isihlalo sibe yinto yokugcina noma ubani okufanele akhathazeke ngayo ngesikhathi se-teardown.
