Indlela yokukhetha iValve Stem phantsi kobushushu obuphezulu kunye neemeko zoxinzelelo oluphezulu
Kwisakhiwo sevalvu, isiqu sevalvu asibonakali sinzima, kodwa logama nje udlule kwinkqubo yobushushu obuphezulu kunye noxinzelelo oluphezulu, uyazi ukuba yenye yezona ndawo zinengxaki kakhulu. Ingakumbi kwizityalo zamandla, ukucocwa kunye ne-metallurgy, apho ubushushu besixhobo esiphakathi budla ngokuba ngama-degrees angamakhulu amane okanye amahlanu kwaye uxinzelelo lungama-kilogram alishumi, ukuba isiqu sevalvu asikhethwanga ngokufanelekileyo, isitywino siya kusilela ubuncinane, kwaye siya kwaphuka ngqo okanye sibambeke.
Siye sadibana nemeko esebenzayo: iqela leevalvu zeglobe ezisetyenziswa kwisikhululo samandla laqala ukuxinana rhoqo emva kwesiqingatha sonyaka sisebenza, kwaye ukudilizwa kweso sakhiwo kwafumanisa ukuba umphezulu wesiqu sevalvu wawutshintshile umbala kwaye ugqwethekile, kwaye ukupakisha kokuvala kwakungenakucinywa. Kamva, kwaqinisekiswa ukuba uyilo lokuqala lwenziwe ngentsimbi engagqwaliyo engama-304, kodwa ubushushu bokusebenza bombhobho babusondele kwi-500°C, kwaye izinto zazidlule umda.
Isizathu esiyintloko sokusilela kwesiqu kubushushu obuphezulu kunye noxinzelelo oluphezulu asikokuphela nje kwamandla ezinto ezibonakalayo, kodwa kukwanokutshintsha kobukhulu bokulingana ngenxa yokwanda kobushushu, ukwaphuka kokudinwa okubangelwa kukuxinana koxinzelelo lobushushu, kunye nokungqubana okomileyo okubangelwa kukungaphumeleli kwezithambiso. Ingakumbi ekusebenziseni ukuvulwa nokuvalwa rhoqo, imivimbo emide, kunye nemithwalo ephezulu, ukufakwa kwezi zinto kuya kunciphisa kakhulu ubomi besiqu sevalvu.
Ngoko ke, ngokubanzi sigxila kwiinkalo ezininzi xa sikhetha: okokuqala, zama ukusebenzisa izixhobo ezinobushushu obuphezulu kunye namandla azinzileyo, njenge-17-4PH, F6a, 1Cr13Mo kunye nezinye iintsimbi ezine-alloy ephezulu, ukuba ziyindlela ye-asidi, kufuneka kuqwalaselwe intsimbi engagqwaliyo ephindwe kabini okanye i-Monel alloy; Okwesibini, kucetyiswa ukuba kufakwe umaleko we-carbide oqinisiweyo kwinxalenye yoqhagamshelo olunemisonto ukuphucula amandla okulwa nokubanjwa; Okwesithathu, indawo yoqhagamshelwano lokuzalisa kufuneka yenziwe ngomatshini ngokuchanekileyo kwaye ifakwe i-nitride okanye igqunywe.
Ukongeza, kuyacetyiswa ukuba kusetyenziswe i-integral processing endaweni ye-welded splicing structure kangangoko kunokwenzeka ukunciphisa umngcipheko wokungasebenzi kakuhle kwe-interface. Kwizicelo ze-long-stroke, kuyimfuneko ukuba kuqwalaselwe i-axial offset ebangelwa kukuguquka kobushushu, kungenjalo kunokubakho iingxaki "ezingekho kwindawo" okanye "ezibambekileyo".
Isiqu sevalvu esiveliswa yiYining Machinery okwangoku sisetyenziswa kakhulu kwi-petrochemical, umbane, i-metallurgy, igesi enyibilikisiweyo kunye neminye imboni, senze ngokukodwa iziqu zevalvu ezenzelwe wena ezifanelekileyo kwizakhiwo ezahlukeneyo zoqhagamshelo kwiinkqubo zevalvu ezinobushushu obuphezulu kunye noxinzelelo oluphezulu, kubandakanya ukugqitywa kwe-forging, ukuwelda umphezulu wentambo, unyango lwesipili kunye nezinye iinkqubo, ezinokuhlangabezana neemfuno zomsebenzi zomthwalo ophezulu kunye nokuvula nokuvala okuphezulu.
Ngamafutshane, nangona isakhiwo sesiqu silula, kwimeko yobushushu obuphezulu kunye noxinzelelo oluphezulu, xa ukhetho olungafanelekanga "luyindawo ebuthathaka" yenkqubo. Kucetyiswa ukuba kwinqanaba loyilo kunye nokuthengwa, ukubalwa kweenkcukacha kufuneka kwenziwe kunye neeparamitha zemeko yokusebenza, iindlela zokuvula nokuvala, kunye nokuphindaphinda kokusetyenziswa, endaweni yokujonga nje izinto zokuzoba okanye ixabiso ukuze kuchongwe ukhetho.