Imiyalelo yofakelo lwevalvu yokhuseleko kunye nohlalutyo lokulumkisa Ivalve yokhuseleko olubalulekileyo lophononongo lomlinganiselo woxinzelelo – iivalvu zeLecco

Imiyalelo yofakelo lwevalvu yokhuseleko kunye nohlalutyo lokulumkisa Ivalve yokhuseleko olubalulekileyo lophononongo lomlinganiselo woxinzelelo – iivalvu zeLecco

Imiyalelo yokufakela ivalve yokhuseleko
Kuyilo lweplanti yepetrochemical, njengoko inani lamanqanaba aphakathi kunye noxinzelelo oluphezulu lwezixhobo kunye nemibhobho ebandakanyekayo ekwandeni, ukusetyenziswa kweevalvu zokhuseleko kuye kwanda ngokufanelekileyo. Ke ngoko, ivalve yokhuseleko ichanekile, uyilo olufanelekileyo lubaluleke kakhulu.
1. Ivalve yokhuseleko kwisixhobo okanye kwipayipi kufuneka ifakwe ngokuthe nkqo kwaye isondele kangangoko kwisixhobo esikhuselweyo okanye umbhobho. Nangona kunjalo, ivalve yokhuseleko lombhobho wolwelo, umtshintshi wobushushu okanye isikhongozeli, xa ivalve ivaliwe, uxinzelelo lunokwenyuka ngenxa yokwandiswa kwe-thermal, inokufakwa ngokuthe tye.
I-2, i-valve yokhuseleko kufuneka ifakwe ngokubanzi kwindawo apho kulula ukuyilungisa kunye nokulungelelanisa, kwaye kufuneka kubekho indawo eyaneleyo yokusebenza ngeenxa zonke. Njenge: valve yokhuseleko lwesikhongozeli esithe nkqo, i-DN80 ngezantsi, inokufakwa ngaphandle kweqonga; I-DN100 ifakwe ngaphandle kweqonga kufuphi neqonga, ngoncedo lweqonga lingasetyenziselwa ukulungisa nokugqithisa i-valve. Kwaye akufuneki ifakwe kwisiphelo semibhobho emide ethe tyaba ukunqanda ukufumba kwezinto eziqinileyo okanye ulwelo.
3. Ivalve yokhuseleko efakwe kumbhobho kufuneka ibekwe kwindawo apho uxinzelelo luzinzile kwaye kukho umgama othile ukusuka kumthombo wokuguquguquka.
I-4, i-valve yokhuseleko kwi-atmosphere, kwi-medium engenabungozi jikelele (efana nomoya, njl. njl.) umlomo wombhobho wokukhupha uphezulu kune-port yokukhupha njengeziko le-715m ye-radius ye-platform yokusebenza, izixhobo okanye umhlaba we-2.5m ngaphezulu. Kwimithombo yeendaba ezitshabalalisayo, ezinokutsha okanye ezinobuthi, indawo yokukhupha kufuneka ibe ngaphezu kwe-3m ngaphezu kweqonga lokusebenza, izixhobo okanye umhlaba ongaphakathi kwi-radius ye-15m.
I-5, i-valve yokukhupha i-valve ixhunyiwe kumbhobho wokunciphisa uxinzelelo, ukuba ifakwe kumbhobho ukusuka kwicala eliphezulu ukuya kwi-Angle ye-45, ukuze ungathululi i-condensate kumbhobho wesebe, kwaye unokunciphisa uxinzelelo lwangasemva lokhuseleko. ivalve. Xa uxinzelelo oluqhubekayo lwevalve yokhuseleko lukhulu kune-710MPa, faka i-45 kufuneka isetyenziswe.
6. Akufuneki kubekho i-liquid-shape-shaped liquid kumbhobho wokukhutshwa kwenkqubo yokunciphisa uxinzelelo lwegesi emanzi, kunye nokuphakama kofakelo lwevalve yokhuseleko kufuneka ibe phezulu kunenkqubo yokunciphisa uxinzelelo. Ukuba i-valve yokukhupha i-valve iphantsi kunomgca oyintloko wokukhulula uxinzelelo okanye umbhobho wokukhupha kufuneka uphakanyiswe ukufikelela kumgca oyintloko, itanki yokugcina ulwelo kunye nenqanaba lokulinganisa okanye i-valve yokukhupha ulwelo kufuneka ibekwe phantsi kwaye kulula. indawo efikelelekayo, kwaye ikhutshwe rhoqo kwisistim evaliweyo ukuphepha ukuqokelelwa kolwelo kwicandelo lombhobho omilise ingxowa. Ukongezelela, kwiindawo ezibandayo, icandelo lombhobho wengxowa lifuna ukushisa kwe-steam ukukhusela ukukhenkceza. Ityhubhu yokulandela umphunga inokuwenza umphunga i-condensate kwityhubhu yengxowa ukunqanda ukuqokeleleka kolwelo. Kodwa nangona ukusetyenziswa kwetyhubhu yokukhangela ubushushu, ivalve ye-drain manual isayimfuneko.
I-7, idizayini ye-valve yokukhupha umbhobho wokhuseleko kufuneka ithathele ingqalelo ukuba uxinzelelo lwangasemva aludluli ixabiso elithile loxinzelelo oluqhubekayo lwevalve yokhuseleko. Kwi-valve yokhuseleko lohlobo lwasentwasahlobo, uhlobo oluqhelekileyo loxinzelelo lwangasemva akufanele ludlule i-10% yoxinzelelo olulinganisiweyo lwevalve, uhlobo lwe-bellows (uhlobo olulungelelanisiweyo) uxinzelelo lwangemva alufanele ludlule i-30% yoxinzelelo lwevalve yokhuseleko, kumqhubi wenqwelomoya. uhlobo lwevalve yokhuseleko, uxinzelelo lwangasemva aludluli i-60% yoxinzelelo oluqhubekayo lwevalve yokhuseleko. Ixabiso elithile kufuneka libhekiselele kwisampulu yomenzi kwaye igqitywe ngenkqubo yokubala.
I-8, ngenxa yokuba igesi okanye umphunga ukhutshelwa emoyeni ngokuphuma kwevalve yokhuseleko, amandla achaseneyo aveliswa kumgca osembindini wombhobho wokuphuma, obizwa ngokuba yi-reaction force yevalve yokhuseleko. Impembelelo yale mandla kufuneka ithathelwe ingqalelo kuyilo lomgca wokuphuma wevalve yokunceda. Okunje: umbhobho wevalve yokhuseleko kufuneka unikezwe ngenkxaso esisigxina; Xa icandelo lombhobho wokungena kwi-valve yokunceda lide, udonga lwenqanawa yoxinzelelo kufuneka luqiniswe.
Imiqathango yokusebenza kwevalvu yokhuseleko
1. Ivalve yokhuseleko esebenzisa isebe kufuneka ibeke ngokucacileyo ezi mfuno zilandelayo zokhuseleko kwivalve yokhuseleko kwinkqubo kunye nemithetho yasemva kokusebenza:
1. Izalathi zenkqubo yokusebenza (kubandakanywa uxinzelelo lokusebenza, ukushisa okusebenzayo okanye ukushisa okuphantsi, ukubeka uxinzelelo);
2. Izithintelo zevalvu yokhuseleko kunye neendlela zokusebenza (kwivalve yokhuseleko enewrench);
3. Izinto ezimele zihlolwe ekusebenzeni kwevalve yokhuseleko, iziganeko ezingaqhelekanga ezinokwenzeka kunye namanyathelo okuthintela, kunye neenkqubo zokuchithwa ngokukhawuleza kunye nengxelo.
2. Ukuhlolwa rhoqo kufuneka kwenziwe ngexesha lokusebenza kwevalve yokhuseleko. Ixesha lokuhlola liqulunqwe ngumsebenzisi ngamnye ngokwemeko ethile, kwaye ubude akufanele budlule kanye ngenyanga. Ezi zinto zilandelayo kufuneka zihlolwe ngokukodwa:
1. Ingaba ipleyiti yegama igqityiwe;
2. Isitywina sevalve yokhuseleko sicocekile;
3. Ingaba ivalve yokusika esetyenziswa kunye nevalve yokhuseleko ivuleke ngokupheleleyo kunye nesitywina sicocekile;
4. Khangela ukuba ngaba kukho nakuphi na ukungalandeli okwenzekayo ngexesha lokusebenza.
5. Ingaba inokuthi ihambe ngokuguquguqukayo xa uxinzelelo lokumisela lugqithiswa ekusebenzeni.
Okwesithathu, ivalve yokhuseleko kwinkqubo yokusetyenziswa, xa kwenzeka ezi ngxaki zilandelayo, umqhubi kufuneka anike ingxelo kumasebe afanelekileyo ngexesha ngokwemigaqo emiselweyo:
1. Uxinzelelo olugqithisileyo alusuki;
2. Musa ukubuyela esihlalweni emva kokunduluka;
3. Ukuvuza kwenzeka;
4. Phambi kokuba ivalve yokhuseleko isike ivalve kunye nesitywina sokhuseleko siwe.
Okwesine, isitya soxinzelelo kwinkqubo yokusebenza, ivalve yokhuseleko ngaphambi kokuba i-valve yokunqunyulwa ibe kwindawo evulekile ngokupheleleyo kunye nesitywina. Akuvumelekanga ngokungqongqo ukuvala ivalve yokhuseleko ekufeni, ukucinywa okanye ukuvala ivalve yokuvala. Naluphi na utshintsho ekusebenzeni kwevalve yokhuseleko kufuneka luvunywe ngumphathi.
Isihlanu, i-valve yokhuseleko enomsebenzi woxinzelelo, inqatshelwe ngokungqongqo ukwenza nayiphi na umsebenzi wokulungisa kunye nokuqina. Isidingo sokwenza ukulungiswa kunye neminye imisebenzi, iyunithi yomsebenzisi kufuneka iqulunqe iimfuno zokusebenza ezisebenzayo kunye namanyathelo okukhusela, kunye nomntu wobugcisa ophethe isivumelwano, ekusebenzeni kwangempela komnyango kufuneka athumele abantu ukuba bajonge indawo.
Isithandathu, umqhubi akavumelekanga ukuba avule kwaye asuse itywina elikhokelayo okanye ahlengahlengise isikrufu sokuseta ivalve yokhuseleko.
7. Ivalve yokhuseleko esecaleni kufuneka igcinwe ngokufanelekileyo kwaye igcinwe.
Uphononongo malunga neReyishini yoxinzelelo olubalulekileyo lweValve yoKhuseleko - Uphononongo malunga neReyishini yoxinzelelo olubalulekileyo lweValve yokhuseleko - I-Lyco Valve Abstract: Ifomula yokubala umlinganiselo woxinzelelo olubalulekileyo lwevalvu yokhuseleko iyaboniswa.
IZIPHUMO ZOMVAVANYO ZIBONISA UKUBA IXESHA LOKUXINZELELA OKUMNTU ELIXHOMILEYO LOKHUSELEKO LUCHAPHAZELEKA KAKHULU NGUMLINGANISO WOXINZELELO OLUNDOQO LOMbhobho kunye ne-Disc flow resistance coefficient, kwaye ngenxa yokuba i-disc flow resistance coefficient inkulu kakhulu, ivalve yokhuseleko ikwi-subcritical. imo yokuqukuqela.
I-Gb50-89 "I-Steel Pressure Vessel", ngokwemeko yokuhamba kwevalve yokhuseleko yahlukile, ibeka phambili iindidi ezimbini zefomula yokubala yokufuduswa, ngoko ke, ukugweba ukuba ivalve yokhuseleko ikwimeko yokuqukuqela ebalulekileyo okanye i-subcritical flow state, Isiseko sokhetho oluchanekileyo lwefomula yokubala yokufuduswa.
Okwangoku, kukho iimbono ezimbini ngexabiso lomlinganiselo woxinzelelo olubalulekileyo lwevalvu yokhuseleko: ① kucingwa ukuba umlinganiselo woxinzelelo olubalulekileyo lwevalvu yokhuseleko iyafana nomlinganiselo woxinzelelo obalulekileyo wombhobho kwiinkcukacha zamazwe ahlukeneyo. , kwaye ixabiso layo li-0.528 [1,2].
② Iingcali ezininzi kunye nabaphandi bakholelwa ukuba umlinganiselo woxinzelelo olubalulekileyo lwevalve yokhuseleko lungaphantsi koxinzelelo olubalulekileyo lwe-nozzle, kwaye ixabiso layo limalunga ne-0.2 ~ 0.3 [3] Ukuza kuthi ga ngoku, akukho ndlela yokubala engqongqo kunye nechanekileyo yethiyori. Umlinganiselo woxinzelelo lwevalve yokhuseleko yamkelwe.
Ngoko ke, ukugqiba umlinganiselo woxinzelelo olubalulekileyo lwe-valve yokhuseleko kunye nokugweba ngokuchanekileyo imeko yokuhamba ngokukhuselekileyo kuseyingxaki engxamisekileyo ukuba isonjululwe kubunjineli, engazange ichazwe kwiincwadi ngoku.
Ngohlalutyo lwethiyori kunye nophononongo lovavanyo, umbhali uxoxa ngemeko yokuhamba kwevalve yokhuseleko kwaye abeke phambili ifomyula yokubala ithiyori yomlinganiselo woxinzelelo olubalulekileyo lwevalvu yokhuseleko.
1 Ivalve yokhuseleko iqondo loxinzelelo olubalulekileyo lomlinganiselo we-RCR ibhekisa kumlinganiselo we-inlet kunye ne-outlet yoxinzelelo xa isantya sokuhamba komoya sifikelela kwisantya sendawo yesandi kwinqanaba elincinci lokuhamba.
Umlinganiselo woxinzelelo olubalulekileyo lombhobho ungabalwa ngefomula kwithiyori.
Xa i-nozzle inlet pressure ratio ingaphantsi okanye ilingana nomlinganiselo obalulekileyo woxinzelelo lwe-nozzle, ukuphazamiseka kwe-outlet inlet pressure ratio ayinako ukudlula indiza ye-sonic ngenxa yokuhamba kwe-sonic kwicandelo lokuphuma, ngoko ke ukuphazamiseka akunakuchaphazela ukuhamba. emlonyeni.
Uxinzelelo lwe-airflow kwicandelo lokuphuma luhlala lungatshintshi kwi-P2 / P1 = Cr, ukuhamba komoya kwindawo yokuphuma kusekho ukuhamba kwe-sonic, kwaye ukufuduka okuhambelanayo kuhlala kungatshintshi, oko kukuthi W / Wmax = 1. Ngeli xesha, umlomo wombhobho ukwimeko yokuqukuqela okubalulekileyo okanye okugqithisileyo [4].
Ukongeza kwi-nozzle, umlinganiselo woxinzelelo obalulekileyo wezinye izakhiwo zihlala zifuna ukumiselwa ngovavanyo, kwaye umlinganiselo woxinzelelo olubalulekileyo ogqitywe luvavanyo ubizwa ngokuba ngumlinganiselo wesibini woxinzelelo olubalulekileyo lokwahlula.
Ngenxa yobunzima besakhiwo sevalve yokhuseleko, kunzima ukumisela isantya sokuhamba kwindawo encinci yokuhamba kwinqanaba le-valve yokhuseleko, ngoko ke akunakwenzeka ukumisela ubungakanani boxinzelelo olubalulekileyo lwevalve yokhuseleko ngokuchanekileyo ngokutsho nokuba indawo yokuvalwa kwepaseji encinci ifikelela kwisantya sesandi.
Okwangoku, indlela yokuqinisekisa ukuba i-valve yokhuseleko ifikelele kwinqanaba elibalulekileyo lokuhamba kukulinganisa i-coefficient yokufuduswa kwevalve yokhuseleko. Kukholelwa ukuba i-valve yokhuseleko iya kufikelela kwimo ehamba phambili ebalulekileyo nje ngokuba i-coefficient yokufuduka ingatshintshi kunye nomlinganiselo woxinzelelo [3].
Iziphumo ezilinganisiweyo zibonisa ukuba ukufuduka kwe-valve yokhuseleko kuhlala kutshintsha ngokutshintsha komlinganiselo woxinzelelo, kodwa xa umlinganiselo woxinzelelo lwe-valve yokhuseleko ungaphantsi kwe-0.2 ~ 0.3, ukuhluka kwe-valve yokhuseleko kunye nomlinganiselo woxinzelelo. incinci, kwaye abantu bacinga ukuba olu tshintsho luncinci lubangelwa yimpazamo yokulinganisa, ngoko kugwetywa ukuba umlinganiselo obalulekileyo woxinzelelo lwevalve yokhuseleko evuleke ngokupheleleyo malunga ne-0.2 ~ 0.3.
Isiseko sethiyori sale ndlela yovavanyo yokumisela umlinganiselo woxinzelelo olubalulekileyo lwevalvu yokukhulula kukuba ukuphazamiseka komlinganiselo woxinzelelo akunakudlula indiza ye-sonic kwimeko yokuhamba okubalulekileyo kunye ne-supercritical, ukuze izinga lokukhutshwa kombhobho lihlale lingatshintshi.
Nangona kunjalo, kwisimo sokuhamba okubalulekileyo okanye okugqithisileyo, ukuhamba kwinqanaba lokukhupha umlomo kukuhamba kwe-sonic, okukhokelela ekufudukeni okuhlobene.
Njengoko i-inlet i-P1 yevalve yokhuseleko ikhula, i-disc resistance resistance drop drop P iyanda, kunye noxinzelelo lwe-P2 ye-nozzle kwi-valve nayo iyanda. Ngenxa yoko, i-P2 kunye ne-P1 inokunyusa inyathelo ngesinyathelo, okukhokelela kumlinganiselo woxinzelelo lwe-nozzle kwi-valve r = P2 / P1 ngokuthe ngcembe kwixabiso elimiselweyo.
Njengoko kunokubonwa kwifomula yokubala yokukhutshwa kombhobho, ukufuduswa kombhobho kancinci kancinci kuba lixabiso elimiselweyo, kwaye ukufuduswa kwevalve yokhuseleko kutshintsha kancinci okanye kungatshintshwanga ngomlinganiselo woxinzelelo.
Nangona kunjalo, oku akuthethi ukuba isantya sokuhamba kwinqanaba elincinci lokuhamba kwevalve yokhuseleko lifikelela kwisantya sendawo yesandi. Ngokucacileyo, umlinganiselo woxinzelelo ngeli xesha awukho umlinganiselo obalulekileyo woxinzelelo lwevalve yokhuseleko evuleleke ngokupheleleyo.
Ngaphezu koko, xa ukuphakama kokuvula kwediski kuncinci, i-coefficient yokufuduka yevalve yokhuseleko ayitshintshi kunye nomlinganiselo woxinzelelo nangona umlinganiselo woxinzelelo ufikelela kwi-0.67. Ngokuqinisekileyo, lo mlinganiso woxinzelelo awukwazi ukuthathwa njengomlinganiselo woxinzelelo olubalulekileyo lwevalve yokhuseleko, ngokuthetha ngokwethiyori, umlinganiselo woxinzelelo obalulekileyo wevalve yokhuseleko awunakuba mkhulu kunomlinganiselo obalulekileyo woxinzelelo lombhobho.
Umzobo woku-1 wesakhiwo sevalvu yokhuseleko kunye nemodeli yokubala ithiyori ngomfanekiso 1 b ubonisa ukuba ivalve yokukhulula kunye nombhobho wayo olinganayo ubonakala kumahluko phakathi koxinzelelo lwediskhi lokuchasa ukuhla ngenxa yeenkcazo ezahlukeneyo zendlela yokubala yemveli yamkela ukulingana okufanelekileyo. ukubala imodeli ye-nozzle, kwaye ungayihoyi isiphumo sokuhla koxinzelelo lwe-disc, oluya kubhidanisa lula ivalve yokukhulula kunye nombhobho, Oku kunokukhokelela ABANTU UKUKHOLELWA UKUBA UXINEZELEKO OLUNDOQO LOMHLABA WOKUNXIBELELA KUFANENE NAWO NOZZLE, 0.528, XA NGOKWENENE IMVAVVU YOKUNCEDA NOMlomo zahluke ngokucacileyo.
Umahluko ophambili phakathi kwevalve yokhuseleko kunye ne-nozzle yayo efanelekileyo elinganayo ibonakala kwi-disc resistance resistance drop drop, ngelixa imodeli yokubala yendabuko ayiqwalasele indima ye-disc resistance pressure drop drop P, engenangqiqo.
Isantya sethiyori sombhobho obonakaliswe ziiparamitha ezimile [5]: 3) Apho, u-K sisalathiso se-adiabatic; I-A1A2 ayingombhobho wevalvu yokungena kunye nokuphuma kwecandelo lomjelo wokuhamba; R0 rhoqo igesi; I-T1 yiqondo lokushisa lokungena; R ngumlinganiselo woxinzelelo kwi-inlet ye-nozzle kwivalve, kunye ne-r = 2 / P1. Ngoku yahlula omabini amacala e-Equation (1) nge-P1 kunye ne-equation endaweni (2) kunye (3) kwifomula eyenziwe lula, kunye nobudlelwane phakathi komlinganiselo woxinzelelo lwevalve yokhuseleko kunye nomlinganiselo woxinzelelo we-nozzle kwivalve inokufunyanwa. ngolu hlobo lulandelayo: Kwifomula (4), umlinganiselo woxinzelelo lwevalvu yokhuseleko B, RBB /1 Ukusukela ukuba icandelo lokuhamba okubalulekileyo levalve yokhuseleko evuleke ngokupheleleyo kumqala wombhobho, imeko yokuqukuqela ebalulekileyo * yevalve yokhuseleko inokufikelelwa umlomo womqala.
Ngokutsho kwe-Equation (7), umlinganiselo woxinzelelo olubalulekileyo lwe-RBCR yevalve yokhuseleko ichaphazeleka kakhulu ngumlinganiselo woxinzelelo olubalulekileyo lwe-RCR ye-nozzle kunye ne-disc flow resistance coefficient F.
Xa i-DISC i-coefficient yokumelana nokuhamba kwe-F inyuka, i-EXCRESSURE ratio ebaluleke kakhulu ye-valve yokhuseleko iya kuncipha ngenxa yokuba umlinganiselo woxinzelelo olubalulekileyo lombhobho uhlala rhoqo.
Ingabonwa ukuba umlinganiselo woxinzelelo olubalulekileyo lwe-valve yokukhusela iyancipha ngokunyuka kwe-disc flow resistance coefficient.
Xa i-coefficient yokumelana nokuhamba inyuka kwixabiso elithile elibalulekileyo, umlinganiselo woxinzelelo olubalulekileyo lwe-valve yokhuseleko luya kuncitshiswa ukuya kwi-zero.
Ukuba I-DISC REISTANCE COEFFICIENT IYIDLULE LE IXABISO ELIBALULEKILEYO, IVALVI AYIKUFIKI KWISIMO ESIBALULEKILEYO YOKUQHUBA KUBA i-coefficient ye-DISC Flow RESISTANCE MKHULU KAKHULU, kwaye ivalve yokhuseleko ikwimo yokuqukuqela ngokupheleleyo.
Ngoko ke, ukuba kukho imeko ehamba phambili ehamba phambili kwi-valve yokhuseleko, umlinganiselo woxinzelelo olubalulekileyo lwe-valve yokhuseleko akufanele ube ngaphantsi kwe-zero, oko kukuthi, xa i-RBCR ≥0, i-coefficient yokumelana ne-disc kufuneka ihlangabezane ne-F ≥2 / K.
Kumoya, k=1.4 kunye no-F ≤1.43.
Ngaloo ndlela, ukuba i-valve yokukhusela ikwimeko ehamba phambili ehamba phambili, i-disc yayo yokumelana ne-coefficient F ayikwazi ukudlula i-1.43.
Ukuze unqume ukuba i-valve yokhuseleko ikwimeko ehamba phambili ehamba phambili okanye i-subcritical flow flow, umbhali wenza iimvavanyo kwi-disc flow resistance coefficient yeentlobo ezimbini zeevalve zokhuseleko, i-A42Y-1.6CN40 kunye ne-A42Y-1.6CN50. IKHIWANE. I-2 ibonisa i-curve yobudlelwane bokuvavanya phakathi kwe-disc flow resistance coefficient kunye nomlinganiselo woxinzelelo lwevalve yokhuseleko, apho i-H iphakamileyo yokuvula kunye no-Y ubude bokuvula uvavanyo.
Iziphumo zovavanyo zibonisa ukuba i-disc flow resistance coefficient yevalve yokhuseleko evuleleke ngokupheleleyo ingaphezulu kwe-1.43.
Ngoko ke, kunokugqitywa ukuba nangona i-valve yokungena ye-valve yokhuseleko inkulu, i-valve yokhuseleko ayikwazi ukufikelela kwimeko ehamba phambili ngenxa ye-valve disc resistance pressure drop drops inkulu kakhulu, ngoko ke i-valve yokhuseleko ngokuqhelekileyo ikwi-subcritical flow. urhulumente.
Ukuze kuqinisekiswe ukuthembeka kwesi singqinisiso, umbhali uye wavavanya umlinganiselo woxinzelelo lweevalvu ezimbini zokhuseleko kunye nomlinganiselo woxinzelelo lombhobho kwivalve, kunye neziphumo zovavanyo lomlinganiselo woxinzelelo lwevalve yokhuseleko kunye noxinzelelo loxinzelelo umlomo kwivalve
Iziphumo zovavanyo zibonisa ukuba xa i-inlet i-inlet yevalve yokunceda ifikelela kwi-0.6Pa ye-gauge yoxinzelelo), umlinganiselo woxinzelelo we-nozzle ngaphakathi kwee-valve ezimbini ungaphezulu kwe-0.7.
Ingabonwa ukuba umlomo wombhobho kwivalve kufuneka ube kwimo yokuqukuqela okungaphantsi.
Icandelo lokuhamba elibalulekileyo levalve yokhuseleko evuleke ngokupheleleyo kumqala womlomo, kwaye imo yokuqukuqela ebalulekileyo yevalve yokhuseleko * inokufikelelwa kumqala wombhobho.
Ngoko ke, xa i-nozzle ngaphakathi kwevalve yokhuseleko ifikelela kwimo ehamba phambili ebalulekileyo, i-valve yokhuseleko ikwimeko ebalulekileyo yokuhamba.