Izizathu zokusilela kwesihlalo seValve kunye neengcebiso zokuphucula ulwakhiwo
Emva kokwenza iiprojekthi zeevalvu kule minyaka idlulileyo, ukuba ndinyanisekile, ndibone iimeko ezininzi zeengxaki zesihlalo sevalvu. Uninzi lwexesha, umsebenzisi ukhalaza ngokuvuza kwevalvu, eneneni, ayisiyongxaki yespool, kodwa isihlalo sevalvu sele sigugile kudala. Ngamanye amaxesha izinto azilunganga, ngamanye amaxesha yindlela eyakhiwe ngayo le ndlu, kodwa andizange ndiyithathele ingqalelo imeko yokusebenza.
Ngaphambili sifake iivalvu zebhola zesityalo sokucola, imidiya enothuli, ubushushu obuphezulu, imizobo yoyilo ebhalwe kwisihlalo esithambileyo sentsimbi engagqwaliyo, iziphumo zokusebenza ngaphantsi kwesiqingatha sonyaka, utyelelo lokubuyela lufumanise ukuba iiyunithi ezininzi zokuvuza okukhulu kwangaphakathi. Zichithwe zaza zafunyanwa ukuba iringi yokutywina ikhuhliwe, umphetho wesihlalo sevalvu nawo uwile kancinci. Kamva watshintshwa ngesihlalo sevalvu yesinyithi esitshisiweyo esiqinileyo, ubomi banda ngaphezu kweminyaka emibini.
Kukho iindlela ezahlukeneyo zokusilela eziqhelekileyo: enye kukuguguleka komphezulu wokutywina, ngakumbi ngamasuntswana aqinileyo eendaba, ukuvulwa nokuvalwa rhoqo phantsi kokukrwela ngokukhawuleza kakhulu; eyesibini kukukrazula umaleko we-weld, okuthetha ukuba inkqubo yokugquma ayisebenzi okanye uxinzelelo lonyango lobushushu alukhutshwa; kukwakho nengxaki efihlakeleyo kukuba i-spool kunye ne-seat assembly ayigxininisi, isiphumo kukuba elinye icala loxinzelelo oludala, elinye icala lokuvuza.
Ukuba inqanaba loyilo alisithathi nzulu isihlalo sevalvu, iingxaki azinakuphepheka. Sinomthengi kumgca wokuvelisa i-alumina oneevalvu ezininzi ze-V-ball, isihlalo sevalvu sisinyithi esingenasici esiqhelekileyo, sisebenza ngaphantsi konyaka xa sixinwa, ukucoca akunakucocwa. Kamva, sibanike uhlobo lwe-taper ukuqinisa isakhiwo, songeza umda oqingqiweyo kunye nomjelo wokuxhasa wangaphakathi, osebenza iminyaka emibini ngaphandle kokonakala okukhulu.
Ngokwesakhiwo, kucetyiswa ukuba uyilo luqwalasele amanqaku amathathu: Okokuqala, umphezulu wokutywina kangangoko kunokwenzeka ukuze utshintshelwe, ungalungiswa kwindawo; Okwesibini, izinto zingafakwa kwi-welding kwaye ungadingi ukusindisa ingxaki ngentsimbi enye engagqwaliyo; Okwesithathu, indibano kunye nomda wokuma phakathi, musa ukuxhomekeka ekulungelelanisweni ngesandla ukuze uhlangane. Ngaphandle koko, xa ufaka utshintsho oluncinci, tshintsha amaxesha ambalwa emva kokuqala 'kwe-spool yokukrwela'.
Kwisakhiwo sesihlalo sevalvu esisenzileyo, njengokudibanisa umda wentsimbi odibeneyo kunye ne-composite sealing insert, ukusebenza kuzinzile kakhulu kwiimeko zokusebenza zeoyile yamalahle, i-ammonium phosphate, ulwelo olunetyuwa eninzi. Ngoku abathengi abaninzi bafake ngokuthe ngqo isakhiwo sethu esenziwe ngokwezifiso kwiipakethe zabo zobugcisa, nto leyo ebonisa ukuba olu hlobo lwesisombululo lunokusombulula iingxaki ezikhoyo kweli candelo.
Isihlalo sevalvu yinto engakhange iqwalaselwe ngumntu xa eyila, kwaye ukuba kukho into ehamba gwenxa, yinto enkulu. Cebisa ukuba bonke bayila, benze izinto ezihambelana nokuthengwa, bangajongi nje iphepha ledatha, bamamele ukusebenza kwentsimi kunye nokugcinwa kwabantu ukuba bathini. Ngenxa yokuba iimeko zokusebenza azilindeli abantu, isakhiwo silungile, sifakwe iinyanga ezintathu ukuze sazi.