I-valve yokulawula uhlobo lwe-engeli ekukhiqizeni isetshenziswa kanjani? I-valve yokulawula i-labyrinth ixazulule ngempumelelo izinkinga ze-cavitation, umsindo nokudlidliza kwama-valve ajwayelekile

I-valve yokulawula uhlobo lwe-engeli ekukhiqizeni isetshenziswa kanjani? I-valve yokulawula i-labyrinth ixazulule ngempumelelo izinkinga ze-cavitation, umsindo nokudlidliza kwama-valve ajwayelekile Kuhlelo lokulawula okuzenzakalelayo lwenqubo yokukhiqiza, i-valve elawulayo iyisixhumanisi esibalulekile nesibalulekile, esaziwa njengezandla nezinyawo zenqubo yokukhiqiza okuzenzakalelayo, ingenye. zezingxenye zokulawula ukuphela kwesistimu yokulawula okuzenzakalelayo. Indlela yokugeleza kwe-angular control valve ilula, ukumelana okuncane, ngokuvamile kulungele ukusetshenziswa phambili (ukufakwa). Kodwa-ke, esimweni sokwehla kwengcindezi ephezulu, kunconywa ukuguqula ukusetshenziswa kwe-Angle regulator, ukuze kuthuthukiswe amandla angalingani futhi kunciphise ukulimala kwe-spool, kodwa futhi kuhambisane nokugeleza kwe-medium, gwema ukupheka kanye ukuvinjwa komlawuli. I-valve yokulawula i-engeli ekusetshenzisweni okuhlanekezelwe, ikakhulukazi kufanele igweme isikhathi eside sokuvuleka okuncane, ukuze kuvinjwe ukuzulazula okuqinile futhi kulimaze i-spool. Ikakhulukazi esigabeni sokukhiqiza isilingo sesitshalo samakhemikhali, ngenxa yomthwalo ophansi ekukhiqizeni isilingo, izimo zenqubo yokuklama azikwazi ukuhlangabezana nezidingo ngokushesha, ukusetshenziswa okuphambene kwe-Angle elawula i-valve kufanele kube ngangokunokwenzeka ukuze kugwenywe isikhathi eside. yokuvuleka okuncane, ukuze kuvinjelwe ukulimala kwe-valve elawula i-Angle. Kuhlelo lokulawula okuzenzakalelayo lwenqubo yokukhiqiza, i-valve elawulayo iyisixhumanisi esibalulekile nesibalulekile, esaziwa ngokuthi izandla nezinyawo zenqubo yokukhiqiza, ingenye yezingxenye zokulawula ukuphela kwesistimu yokulawula okuzenzakalelayo. Yakhiwe izingxenye ezimbili: i-actuator ne-valve. Ngokombono wama-hydraulics, i-valve elawulayo ukumelana kwendawo ingashintsha isici se-throttle, i-valve elawulayo ihambisana nesignali yokufaka ngokushintsha i-stroke ukuze iguqule i-coefficient yokumelana, ukuze kuzuzwe inhloso yokulawula ukugeleza. . Isakhiwo se-valve yokulawula i-angular kanye nokusetshenziswa kwesakhiwo se-valve elawula i-Angle engu-1 ngaphezu komzimba we-valve ye-Angle, ezinye izakhiwo zifana ne-valve yesihlalo esisodwa, izici zayo zinquma indlela yayo yokugeleza elula, ukumelana okuncane, ikakhulukazi evumelana nokwehla komfutho ophezulu, i-viscosity ephezulu, equkethe izinto eziqinile ezimisiwe kanye nokulawulwa koketshezi lwe-particle. Ingagwema i-coking, i-bonding and clogging, kodwa futhi kulula ukuyihlanza nokuzihlanza. 2 Uhlobo lwe-engeli elawula i-valve esebenza kahle futhi ehlehla ngaphansi kwezimo ezijwayelekile, kufakwa ivalvu elawulayo yohlobo lwe-engeli phambili, okungukuthi, phansi kuhlangothi olungaphandle. Kuphela esimweni sokuhluka kwengcindezi ephezulu kanye ne-viscosity ephezulu, ukupheka okulula, okuphakathi okuqukethe i-particle emisiwe, ukufakwa okuhlanekezelwe kuyanconywa, okungukuthi, uhlangothi lwezinto ezibonakalayo lube ngaphansi ngaphandle. Inhloso yokubuyisela emuva ukusetshenziswa kwe-angular elawula i-valve ukuthuthukisa amandla angalingani nokunciphisa ukuguga kwe-spool, kodwa futhi kuhambisana nokugeleza kwe-viscosity ephezulu, ukupheka okulula kanye ne-medium equkethe i-particle emisiwe, ukugwema ukupheka nokuvinjelwa. Embonini ye-acetaldehyde eyethulwe yi-Jilin Chemical Industry Co., Ltd. evela eNtshonalanga Jalimane, i-pv-23404 I-Angle elawula i-valve iyanconywa ukuze isetshenziswe ngokuhlehlayo ngaphansi kwesimo senqubo yokwehla kwengcindezi ephezulu. Esivivinyweni sokuxhumanisa amanzi, i-valve elawula i-Angle ikhiqiza i-oscillation enamandla, futhi ithumela umsindo onzima, i-spool izophuka ngemva kokuhlolwa kwe-4h. Ngaleso sikhathi, ochwepheshe bakwamanye amazwe babekholelwa ukuthi ikhwalithi yokukhiqiza i-spool yayingeyinhle. Umbhali ucabanga ukuthi akuyona inkinga yekhwalithi, kodwa ngenxa yokusetshenziswa okungenangqondo. Izizathu zokuphuka kwayo zihlaziywa ngezansi. Siyazi ukuthi okwamanje, ngaphandle kwamavalve emvemvane namavalvu e-diaphragm ahambisana ngokuphelele ngesakhiwo, zonke ezinye izilawuli zesakhiwo azilingani. Lapho i-valve elawulayo ishintsha isiqondiso sokugeleza, ngenxa yoshintsho lwendlela yokugeleza izobangela) ushintsho lwenani. Ukugeleza okuvamile kwazo zonke izinhlobo zama-valve alawulayo ukwenza i-spool ivuleke isiqondiso (ukusetshenziswa okuhle), umenzi unikeza kuphela umthamo wokugeleza wendlela evamile yokugeleza) inani nezici zokugeleza. Uma i-valve elawulayo isetshenziswa ngokuhlehla, amandla okugeleza kwe-valve elawulayo azokhula lapho uketshezi lugeleza ngalapho i-spool ivaliwe. Ngesikhathi sokuhlolwa kokuxhumanisa amanzi, izimo zenqubo ezifanisiwe azikwazi ukufinyelela esimweni esivamile maduzane, futhi i-valve yokulawula isetshenziswa esimweni esincane sokuvula isikhathi eside. Ngenxa yamandla angalingani, kuzoba nokungazinzi okukhulu. Ngakho-ke i-valve elawulayo izoveza ukushaqeka okunamandla nomsindo onzima, okuholela ekutheni i-spool iphuke ngokushesha. Ngaphansi kwezimo zenqubo evamile, ukuvulwa kwe-valve yokulawula kulinganiselwe, ngisho noma ukuvulwa okuncane kufushane, ngakho-ke i-valve yokulawula ingasetshenziswa ngokujwayelekile nangokuphepha. I-valve yokulawula i-labyrinth ixazulule ngempumelelo izinkinga ze-cavitation, umsindo nokudlidliza kwama-valve ajwayelekile I-valve yokulawula i-labyrinth yezigaba eziningi kagesi noma yepneumatic isetshenziswa kumkhono we-axial flow pressure wezigaba eziningi owenziwe i-labyrinth channel elawula i-valve, ilawula ngokuphelele izinga lokugeleza medium nge-valve, yehlisa kakhulu igesi yokucindezela okukhulu noma umusi okhiqizwe kumsindo we-valve, uzinzile we-multi-level step-down ngempumelelo yenza uketshezi lungakhiqizi i-cavitation, isetshenziswa endaweni yokucindezela okuphakathi nendawo ezinzile yokulawula ukusebenza, Ungakhetha i-multi - spring pneumatic film mechanism noma i-actuator kagesi. I-valve yokulawula i-labyrinth iqukethe i-cylindrical disc enobuningi bezindawo ezihlangene ezisatshalaliswa nge-labyrinth yobubanzi obugobile. Ngokuya ngemingcele yenqubo ehlukene yendawo ephakathi, idizayini yokucaciswa kobubanzi obuhlukahlukene be-maze kanye nenani lezendlalelo ezigqagqene ezakhiwe ikheji ye-valve, ikheji ye-valve izoba umzila ophelele wokugeleza ekujikelezeni okuncane noma isinyathelo esifana nokusatshalaliswa kokugeleza okugobhozayo. isiteshi, ukuphoqa uketshezi ukuthi lushintshe njalo isiqondiso sokugeleza kanye nendawo yokugeleza kancane kancane kunciphisa ukucindezela koketshezi, ukuvimbela ukuvela kwe-flash cavitation, ukwandisa impilo yesevisi yezingxenye ze-valve. I-spool ye-sleeve ebhalansile enokulingana okuqinile esihlalweni iqinisekisa ukuvuza okuphansi kakhulu. I-valve yangaphakathi ifaneleka kuzo zonke izinhlobo zezimo ezilula ukuvimba ukugeleza nokubangela i-cavitation. Kuphawu lwevalvu elawula umfutho ophezulu ongenisiwe waseMelika njengesibonelo, ivalvu elawula i-labyrinth yaseMelika, evame ukusetshenziselwa izinga lokushisa eliphezulu nomusi womfutho ophezulu, kanye nezikhathi zokuphakelwa kwamanzi. I-valve yokulawula yokushisa ephezulu kanye nengcindezi ephezulu isetshenziswa kakhulu esiteshini samandla, i-metallurgy, i-petrochemical nezinye izimboni eziningi, izinga lokushisa eliphezulu nokucindezela okuphezulu okulawula i-valve cavitation, izinkinga zomsindo nokudlidliza, kube nzima ukuxazulula isihloko. I-valve yokulawula i-labyrinth isebenzisa ubuchwepheshe obuvuthiwe, ixazulule ngempumelelo i-valve yokulawula ejwayelekile ehlangatshezwane nayo njenge-cavitation, umsindo omkhulu, ukudlidliza nezinye izinkinga, isetshenziswe kubhayela wezitshalo zamandla ukunciphisa amanzi afudumele, iphampu yokuphakelayo yokulawula ukugeleza okuncane kanye nokunye ukulawulwa kokugeleza. I-valve yokulawula i-labyrinth ingaklanywa ngokuqondile ngezidingo ezahlukene zabasebenzisi, ngokulawula izinga lokugeleza kwe-medium ukuze kuqedwe izinkinga ze-cavitation, umsindo, ukugqwala kanye nokudlidliza. I-valve yokulawula uhlobo lwe-labyrinth esakhiweni sokwakheka kokuhlakazeka okusheshayo, ukugcinwa okulula, kungaba lula kakhulu ukufaka esikhundleni se-spool; Ezicini zokugeleza zokusetshenziswa komklamo wecala, ukuze kuhlinzekwe ukulawula ukugeleza okuqhathanisayo, okunezici eziqinile zokuvala. Isikhungo samandla samukela i-valve yokulawula i-labyrinth, engaqinisekisa ukusebenza okuphephile nokuzinzile, ukuthuthukisa izinga nokwandisa umjikelezo wokunakekela. Ku-valve eyehlayo enesiteji esisodwa esijwayelekile, ingcindezi ingu-p1 kanti izinga lokugeleza lithi v1 lapho kungena okuphakathi. Lapho i-medium igeleza engxenyeni ye-spool, ngenxa yomphumela we-throttling we-spool nesihlalo, i-neck shrinkage phenomenon, ngakho-ke izinga lokugeleza lizokhula ngokushesha libe yi-v2, futhi ingcindezi iyancipha ngokushesha ibe yi-p2, futhi ngokuvamile iphansi kune-medium saturated. I-vaporization pressure Pv. Kulesi simo, i-medium vaporize, yakhe ama-bubbles. Lapho i-medium igeleza engxenyeni yentamo eyenziwe yi-valve core kanye nesihlalo, isimo sokusebenza sibuye sishintshe ngenxa yokuguqulwa kwesiteshi. Imbobo yokucindezela iyakhuphuka futhi amandla e-kinetic aguqulwa abe amandla angaba namandla. Ngalesi sikhathi, ingcindezi ibuyela ku-P3 kanye nesivinini ku-v3. Lapho ingcindezi idlula ingcindezi egcwele yokuhwamuka kwe-medium, i-Pv, amabhamuza asanda kwakhiwa azoqhuma, akhiqize ingcindezi yendawo eqinile. Amandla amakhulu lapho ibhamuza liqhuma angabangela umonakalo omkhulu kumongo we-valve, isihlalo se-valve nezinye izinto ezinyakazayo ngomzuzwana, enze into ebizwa ngokuthi yi-cavitation phenomenon. I-Cavitation iboshelwe ukubangela ukulimala kwe-valve, okuholela ekuvuzeni, umsindo omkhulu futhi kubangele ukudlidliza kwezingxenye ze-valve, ngaleyo ndlela kuthinte ukuphepha nokusebenza kahle kwalo lonke uhlelo. Ngenxa yokuthi i-cavitation izokhiqiza izinkulungwane ze-atmospheres of surface impact pressure on the throttle element, ngakho-ke, ngokumane nje kuthuthukiswe ubulukhuni bobuso be-valve core kanye nesihlalo se-valve ayikwazi ukuxazulula ngokuyisisekelo inkinga ye-cavitation. Idizayini ye-anti-cavitation ye-valve yokulawula i-labyrinth iwukusetshenziswa kwesimiso se-labyrinth core multistage step-down, ngokuphoqa okuphakathi ukuthi kugeleze ochungechungeni lokugoba kwe-Angle engakwesokudla ukuze izinga lokugeleza lilawulwe ngokuphelele, ukufeza inhloso ukwehlela phansi. Kungakhathaliseki ukuthi ukwehla kwengcindezi, ukumelana kwala majika kunciphisa izinga lapho imidiya ingageleza iphume phakathi. Ngemuva kwe-multistage depressurization, ingcindezi ye-medium ihlale igcinwa ngaphezu kwengcindezi egcwele ye-vaporization ye-pv ephakathi, ngaleyo ndlela igwema i-cavitation phenomenon futhi isuse izici ezingaphephile. Iphakethe le-labyrinth core lenziwe ngezingcwecwe eziningi ze-labyrinth eziboshelwe ngaphansi kwezimo ezikhethekile (zisebenzisa izinamathiselo ezingeniswa kwamanye amazwe). Isitsha ngasinye se-labyrinth sicutshungulwa ngendlela ephelele yokwenza ukwakha iziteshi eziningi, futhi isiteshi ngasinye singadlula inani elithile le-medium, futhi ukumelana okuphakathi kunikezwa uchungechunge lwe-Angle egobile esiteshini. Ngokwezidingo ezihlukene zabasebenzisi, ngokubala, ukukhethwa kochungechunge oluhlukile lwejika, ukuze isivinini esiphakathi nendawo ngephakeji ye-labyrinth core sihlale sinqunyelwe kububanzi obuthile. Ibhekiselwa kokuhlangenwe nakho kwabantu abadala bakwamanye amazwe, lapho izinga lokugeleza lingaphansi noma lisondele ku-30m/S, umthelela ekugugulekeni kwesici se-throttle mncane. Ngenxa yokuthi izinga lokugeleza kanye nenani lokugoba idiski ngalinye le-labyrinth lingahlukahluka, futhi ukujiya kwediski kungaklanywa ukuthi kube mncane kakhulu (isb. Ngokusetshenziswa kwe-valve kanye nezidingo zomsebenzisi, ijika lesici sokugeleza sevalvu elawulayo lingaklanywa ukuthi libe umugqa, amaphesenti alinganayo, amaphesenti aguquliwe kanye namanye amafomu ejika akhethekile. Ngenxa yokuthi indawo yokusebenza ku-valve yesitshalo samandla ngokuyisisekelo iwuketshezi (ikakhulukazi amanzi), i-labyrinth inlet elawula ivalvu ngokuvamile yamukela ukugeleza kwesakhiwo esiseduze. Lapho ukugeleza kwesakhiwo sohlobo lwe-valve, okuphakathi kuya emzimbeni we-valve, kuqala ngephakheji eliyinhloko, bese kuthi ngokusebenzisa i-valve core, ngemva kokuphuma okubaluleke kakhulu okuvela esihlalweni se-valve, ukugeleza kwe-valve kuboniswa ilebula emzimbeni we-valve. .