Xa usiva 'i-valve cage', ukuba ucinga ukuba yindlu nje eyomeleleyo ye-trim, awuphazamanga, kodwa uphosa inqaku. Ligorha elingachazwanga elichaza ulawulo, ubomi obude, kwaye rhoqo, ubuntu bevalve yonke kwinkonzo eqatha.
Undoqo wembono ephosakeleyo kunye neNyaniso yezinto
Imiba emininzi kakhulu ithatha ikheji njengempahla yorhwebo, igxile kuphela kwizinto ezisikiweyo. Leyo yindlela ekhawulezayo yokusilela kwangaphambi kwexesha. Ikheji ayikho nje ukubamba iinxalenye; yeyona nto iphambili ekhokelela ukuhamba, ukulawula isantya, kunye nokuthatha ubunzima be-cavitation kunye nokhukuliseko. Ndikhe ndabona iivalve zisilela kuba i-trim yayiyi-Inconel 625 kodwa ikheji yayiyi-316SS eqhelekileyo eyaye yahlanjwa kwiinyanga ezintandathu, ishiya iplagi elungileyo ijikeleza.
Apha kulapho isiseko kunye nomnombo womatshini womthengisi ungaxoxiswana. Udinga umntu oqondayo ukuba ingqibelelo iqala ekunyibilikeni. Inkampani efana Qingdao Qiangsenyuan Technology Co., Ltd. (QSY), kunye namashumi amathathu eminyaka kwiqokobhe kunye nokuphosa utyalo-mali, ufumana oku. Ayikokwenza nje imilo; imalunga nokufezekisa ubume obufanayo, obungenasiphako kwisakhiwo senkozo kwizinto ezithandwa ziintsimbi eziphindwe kabini okanye ialloyi esekwe kwicobalt ukusuka ekugaleleni kokuqala. I-microscopic shrinkage cavity kwindlela ehamba phambili ebalulekileyo yibhombu yexesha lokuphawula.
Ukhetho phakathi kokungunda kweqokobhe kunye nokuphosa utyalo-mali lwekheji lurhwebo lwakudala. Kwiikheji ezinkulu, ezingaphantsi kwekhabhoni okanye intsimbi ephantsi, i-shell mold yomelele kwaye ingabizi. Kodwa xa ujongene noyilo oluntsonkothileyo lwemingxuma emininzi ye-anti-cavitation okanye i-low-noise trim in super duplex okanye i-Hastelloy, ukuphosa utyalo-mali kukuphela kwendlela yokufumana ezo ndinyana zangaphakathi zigudileyo kwaye zichanekile ngaphandle kwethamsanqa kumsebenzi we-EDM. Ubuchule obubini be-QSY apha luluncedo olusebenzayo, oluvumela uncomelo olulungele injongo endaweni yenkqubo enye-ifanele zonke iindlela.
Ukuchaneka akukona nje ukunyamezelana kuMzobo
Kulungile, ngoko unesandi esisasazwayo. Ngoku umsebenzi wokwenene uyaqala. Imigangatho yokukhwelana kunye nebhonethi kunye neplagi, i-concentricity yemingxuma yokuhamba, ukugqitywa kweebhore zangaphakathi-ezi zinto zihlukanisa icandelo kwisixhobo esichanekileyo. Ulungelelwaniso olungephi apha alubangeli nje ukuvuza; ibangela ukuhamba kwe-asymmetric, ukuguga okungalinganiyo, kunye nokubopha iziqu. Ndikhumbula isehlo esinevalvu yoxinzelelo oluphezulu apho incoko kunye nobomi obufutshane betywina zalandwa zibuyela emva kwikheji enombhobho wayo wawuzii-microns ezimbalwa embindini, obangela ukuba iplagi ihlale ngokulinganayo.
Oku kunyulu CNC Machining kumhlaba, kwaye kufuna okungaphezulu kunevenkile yoomatshini bale mihla. Ifuna ukulungiswa kunye nocwangciso lwenkqubo oluhlonipha umsebenzi wokugqibela wenxalenye. Ingcali yoomatshini kufuneka yazi ukuba yeyiphi imiphezulu ebalulekileyo ekutywineni nasekukhokeleni ngokuchasene nesakhiwo nje. Ivenkile eyenza ulwakhiwo lwezakhiwo kuphela iya kuphoswa zezi nuances. Ubuchwephesha bomatshini, njengale nto ibalaseliswa yi-QSY, ibalulekile ekuguquleni ukuphosa okulungileyo kwindawo ethembekileyo, yokusebenza okuphezulu.
Kwaye makhe sithethe ngaloo mingxuma yokuhamba. Ukugaya ipatheni yemingxuma kulula. Ukugrumba ipateni apho umngxuma ngamnye unomphetho ongaguqukiyo, ongena-burr kunye ne-angle echanekileyo ye-hydrodynamic ukulawula i-flow coefficient (Cv) kunye nengxolo? Bubugcisa obo. Ukukhupha imali akuyonto icingelwayo; linyathelo elisisinyanzelo. I-burr ekhululekile inokugqabhuka, ihambe ezantsi komsinga, kwaye yenze umonakalo. Ndichithe iintsuku ndilungisa ingxaki yolawulo lwevalvu egwenxa kuphela ukuze ndifumane isliva esincinci sentsimbi ukusuka kwizibuko lekheji elingekagqitywa kakuhle elifakwe kwiringi yesitulo.
Ingxaki yoKhetho lwe-alloy: Ingokomxholo
Amaphepha athile ayakuthanda ukuvuthela iAlloy 20 okanye iMonel njengonyango. Kodwa ukhetho lwezinto ezibonakalayo kwikheji yevalve yingxoxo phakathi kokubola, ukhukuliseko, uxinzelelo, kunye nobushushu. I-17-4PH inokuba nkulu ngokomelela kunye ne-corrosion ephakathi, kodwa lukhetho olubi kwiikloridi eziqhubekayo. Ngokukwanjalo, i-alloy esekwe kwi-cobalt efana ne-Stellite 6 imnandi kwinkonzo yokuqhafaza, kodwa ubuchule bayo bubuhlungu kwaye ixabiso liphezulu-uyayicacisa kuphela xa uyifuna ngokupheleleyo.
Apha kulapho amava omthengisi ahlawula khona. Ivenkile esebenza rhoqo kunye ne-spectrum-ukusuka kwi-cast irons kunye ne-carbon steels ukuya phezulu ngokusebenzisa i-nickel-based alloys efana ne-Inconel 718-iphuhlisa ukuvakalelwa kwamathumbu. Basenokutyhalela emva kwi-over-spec okanye balumkise ngokuchasene ne-under-spec. Ngokomzekelo, kwisicelo segesi emuncu (i-H2S ekhoyo), ichaza izinto ezinobunzima obuphezulu ngaphandle konyango olufanelekileyo lobushushu lokumelana noxinzelelo lwe-sulfide yiresiphi yentlekele. Ikheyiji inokuqhekeka ngendlela eyintlekele. Iqabane elinolwazi kufuneka libhengeze loo nto.
Ndikhumbula iprojekthi yesityalo se-geothermal apho ulwelo lwalungumxube okhohlakeleyo wobushushu obuphezulu, iasidi encinci, kunye nesilika exhonyiweyo. Siqale sazama ikheji eqinileyo ye-440C. Yakhukuliseka yaba ngumbhobho ongenamilo kwisithuba sonyaka. Isisombululo yayiyinguqu kwi-alloy ye-nickel-chromium-boron egalelwe isiko kunye nobunzima obuphezulu obushushu kunye nokumelana nokubola. Kwakungekho kuyo nayiphi na ivalve ye-BOM eqhelekileyo, kodwa yayiyimpendulo efanelekileyo yobunjineli. Ababoneleli abanolwazi oluphambili lwe-alloy benza ezi zisombululo.
Ukungaphumeleli njengoMfundisi: Ityala leValve yokungcangcazela
Ezinye zezona zifundo zibalaseleyo zivela kwizinto ezingahambi kakuhle. Sasinevalve yokulawula kumgca womphunga ophuhlise ukungcangcazela okukhulu, okuphakamileyo. I-trim yayiyi-cage eqhelekileyo eneendawo zokubeka. Uxilongo lwalatha kungcangcazelo oluhamba-hambayo, kodwa isantya kwakucingelwa ukuba singaphakathi kuluhlu.
Emva kokuchitha ixesha, safumana ingxaki. Iindawo zokubeka kwindawo yekheji, ngelixa zichanekile ngokwemilinganiselo, zinendawo encinci yokuphoswa komphezulu kwimiphetho yazo elandelanayo endaweni yokuba zenziwe ngoomatshini bagudileyo. Oku kwadala ukuchitheka kwezantyalantyala zemvula ezinyakazelayo rhoqo—isitrato esiqhelekileyo saseKármán vortex—esingqamana nokuphindaphindeka kwendalo kwekheji ngokwayo. Indlwana yayiziculela ngokoqobo ukufa. Ukulungiswa kwaba kumatshini kwakhona zonke iipaseji zokuhamba zangaphakathi ukuya kwindawo egqibeleleyo, ukwaphula i-harmonic. Indifundise ukuba kwiikheji ezikwisantya esiphezulu segesi okanye inkonzo yomphunga, ukugqitywa komphezulu kwiindlela zokuhamba kubaluleke kakhulu njengejometri.
Olu hlobo lokusombulula ingxaki luhlala luwela kumenzi. Ngaba abanakwenza nje into etshintshileyo, kodwa bancede ekuxilongeni kunye nokuphinda uyilo? Ifuna intsebenziswano, iqabane elicinga ngobunjineli kunokuba nje umntu athathe iodolo.
Ukudibanisa kunye noMfanekiso omkhulu
Ekugqibeleni, ikheji yevalve ayisebenzi yodwa. Ukusebenza kwayo kuboshwe kwiplagi, isihlalo, isiqu, kunye ne-actuator. Ikheji eyenziwe ngoomatshini ayinamsebenzi ukuba iplagi ayihambelani neendawo zayo ezikhokelayo kunye nococeko olufanelekileyo. Yiyo loo nto ezinye zezona zivalo zenkonzo engqongqo zithembekileyo zivela kubavelisi abalawula ukuveliswa kwesitaki sesitaki, beqinisekisa ukuba kufanelekile ngokupheleleyo.
Kubaboneleli becandelo abafana ne-QSY, intsingiselo icacile: ukuqonda indibano ngundoqo. Kufuneka babuze, Loluphi uyilo lweplagi olu kudibana nalo? Ingaba yiparabolic, V-port, okanye uyilo olunamanqanaba amaninzi? Imiba yomatshini yekheji edityaniswe neplagi elungeleleneyo yahlukile kwezo zihleli-nye, uyilo olubuyiswe kakhulu. Ukubonelela ngomda kunye nokugqibezela ukuhambelana okuninzi emva kweqashiso yinto evumela abahlanganisi bevalvu ukuba bafezekise ukusebenza okuthembekileyo, okuqikelelweyo.
Ekugqibeleni, ukucacisa i-valve cage ngumsebenzi kwiinkqubo zokucinga. Iyinxalenye yomda woxinzelelo, umlawuli wokuhamba, isixhobo esichasene ne-cavitation, kunye nesixhobo esikhokelayo. Ukuphatha ukuthengwa kwayo njengento elula yokuthenga imathiriyeli kujongela phantsi indima yayo. Udinga umthombo obamba isinyithi, uchwephesha wokwenziwa ngokuchanekileyo, kwaye, kubaluleke kakhulu, ukuqonda okusingqongileyo okukhohlakeleyo le ndawo ekufuneka iphile kuyo. Ngumahluko phakathi kwelungu elingena kunye nelungu elisebenzayo.
