I-coefficient yokugeleza kanye ne-cavitation coefficient ye-valve ichazwe kuthebula lokuqhathanisa lokucindezela kanye nokushisa kwempahla ye-valve.

I-coefficient yokugeleza kanye ne-cavitation coefficient ye-valve ichazwe ngokuningiliziwe etafuleni lokuqhathanisa lokucindezela kanye nokushisa kwempahla ye-valve Ipharamitha ebalulekile ye-valve yi-coefficient yokugeleza kanye ne-cavitation coefficient ye-valve, evame ukutholakala kudatha yama-valve akhiqizwa. emazweni athuthukile ezimboni, futhi aphrintwe ngisho nakusampula. Izwe lethu likhiqiza i-valve ngokuyisisekelo alinalo lolu lwazi lwesici, ngoba thola lesi sici sedatha yesidingo sokwenza ukuhlolwa ukuze sikwazi ukubeka phambili, leli yizwe lethu kanye nezinga elithuthukisiwe lomhlaba legebe le-valve enye yokusebenza okubalulekile. . A, i-valve flow coefficient I-valve flow coefficient iyisilinganiso senkomba yekhono lokugeleza kwe-valve, inani elikhulu lokugeleza kwe-coefficient, ukugeleza koketshezi ku-valve lapho ukulahlekelwa kwengcindezi kukuncane. Ngokwefomula yokubala inani le-KV Lapho: I-KV -- ukugeleza kwe-coefficient Q -- ukugeleza kwevolumu m3/h δ P -- ibha yokulahlekelwa komfutho we-valve -- ukuminyana kwamanzi kg/m3 Okubili, i-coefficient ye-valve cavitation I-cavitation coefficient δ value isetshenziselwa ukunquma hlobo luni lokwakhiwa kwe-valve ongayikhetha ukulawula ukugeleza. Kuphi: H1 -- pressure mH2 -- umehluko phakathi kwengcindezi yasemkhathini kanye nomfutho womphunga ogcwele ohambisana nezinga lokushisa M δ P -- umehluko phakathi kwengcindezi ngaphambi nangemuva kwevalvu engu-M I-coefficient ye-cavitation evumelekile δ iyahlukahluka phakathi kwamavalvu ngenxa yokuhlelwa kwawo okuhlukile. Njengoba kuboniswe emfanekisweni. Uma i-cavitation coefficient ebaliwe inkulu kune-cavitation coefficient evumelekile, isitatimende sivumelekile futhi i-cavitation ngeke yenzeke. Uma i-cavitation coefficient evumelekile ingu-2.5, khona-ke: Uma u-δ2.5, i-cavitation ngeke yenzeke. Ku-2.5δ1.5, i-cavitation encane iyenzeka. Ku-delta 1.5, ukudlidliza kwenzeka. Ukusetshenziswa okuqhubekayo kwe-δ0.5 kuzolimaza i-valve namapayipi angezansi komfula. Amajika esici esiyisisekelo nokusebenza kwama-valve awabonisi lapho i-cavitation yenzeka, ingasaphathwa eyokuthi umkhawulo wokusebenza ufinyelelwa nini. Ngokusebenzisa ukubala okungenhla kucacile. Ngakho-ke, i-cavitation yenzeka ngoba lapho iphampu ye-rotor idlula esigabeni sesigaba esinciphayo ohlelweni lokugeleza okusheshisa uketshezi, ingxenye yoketshezi iyahwamuka, futhi amabhamuza akhiqizwayo abese eqhuma engxenyeni evulekile ngemuva kwe-valve, enezimpawu ezintathu: (1) Umsindo (2) ukudlidliza (ukulimala okungathi sína kwesisekelo nezakhiwo ezihlobene, okuholela ekuqhekekeni kokukhathala) (3) Ukulimala kwezinto (ukuguguleka komzimba we-valve nepayipi) Kusukela kulesi sibalo esingenhla, akunzima ukubona lokho kugoqa. ihlobene kakhulu nokucindezela kwe-H1 ngemva kwe-valve. Ukwandisa i-H1 kuzoshintsha ngokusobala isimo futhi kuthuthukise indlela: A. Faka i-valve ephansi emgqeni. B. Faka i-orifice plate epayipini ngemuva kwe-valve ukwandisa ukumelana. C. I-valve yokuphuma ivulekile futhi iqoqa ngokuqondile i-reservoir, okwandisa isikhala sokuqhuma kwebhamuza futhi kunciphisa ukuguguleka kwe-cavitation. Ukuhlaziywa okubanzi kwezici ezine ezingenhla, kufingqe ivalve yesango, izici eziyinhloko zevalve uvemvane kanye nohlu lwamapharamitha ukuze kukhethwe kalula. Amapharamitha amabili abalulekile adlala indima ebalulekile ekusebenzeni kwe-valve. Valve impahla ingcindezi kanye lokushisa ukuqhathanisa ithebula valve imboni ngaphakathi bayazi ukuthi ukukhethwa valve materials kudingeka ukhethe ngokusho ingcindezi valve ubunjiniyela kanye lokushisa esebenzayo, izinto ezahlukene ingcindezi kanye lokushisa imvelo akufani, sibheka ubuhlobo control. Abangaphakathi embonini ye-valve bayazi ukuthi ukukhethwa kwezinto ze-valve kudinga ukukhethwa ngokuvumelana nengcindezi yobunjiniyela kanye nezinga lokushisa elisebenzayo le-valve. Ukucindezela kanye nemvelo yokushisa yezinto ezahlukene akufani. Ake sibheke ubudlelwano bokuqhathanisa phakathi kwabo. I-Valve impahla yokucindezelwa kanye nethebula lokuqhathanisa izinga lokushisa I-Valve impahla yokuqhathanisa nethebula lokuqhathanisa izinga lokushisa I-Grey cast iron: Insimbi eyi-Grey cast ifanele amanzi, umusi, umoya, igesi namafutha anengcindezi yokuzisholo PN≤ 1.0mpa kanye nezinga lokushisa -10℃ ~ 200℃. Amabanga avamile ensimbi empunga yilawa: HT200, HT250, HT300, HT350. Insimbi exutshwe nensimbi: Ifanele ingcindezi okuzisholo yona PN≤ 2.5mpa, izinga lokushisa -30 ~ 300℃ lamanzi, isitimu, umoya nowoyela medium, brand evame ukusetshenziswa yilezi: KTH300-06, KTH330-08, KTH350-10. I-Ductile iron: Ifanele amanzi, isitimu, umoya namafutha nge-PN≤4.0MPa kanye nezinga lokushisa elingu--30 ~ 350℃. Izinhlobo ezisetshenziswa kakhulu yilezi: QT400-15, QT450-10, QT500-7. Uma kubhekwa izinga lamanje lobuchwepheshe basekhaya, imboni ngayinye ayilingani, futhi abasebenzisi ngokuvamile akulula ukuhlola. Ngokusho kokuhlangenwe nakho, kunconywa ukuthi i-PN≤ 2.5mpa, i-valve yensimbi iphephile. I-silicon ductile iron ephezulu imelana ne-Acid: Ifanele imidiya egqwalayo enomfutho wegazi ongu-PN≤ 0.25mpa kanye nezinga lokushisa elingaphansi kuka-120℃. Insimbi ye-Carbon: Ifanele amanzi, umusi, umoya, i-hydrogen, i-ammonia, i-nitrogen nemikhiqizo ye-petroleum enengcindezi yegama elithi PN≤32.0MPa kanye nezinga lokushisa -30 ~ 425℃. Amamaki asetshenziswa kakhulu yi-WC1, WCB, ZG25 kanye nekhwalithi yensimbi engu-20, 25, 30 kanye nensimbi ye-alloy ephansi engu-16Mn. Ifanele amanzi, amanzi olwandle, umoya-mpilo, umoya, uwoyela kanye neminye imidiya ene-PN≤ 2.5mpa, kanye nemidiya ye-steam enezinga lokushisa -40 ~ 250 ℃, uhlobo oluvame ukusetshenziswa yi-ZGnSn10Zn2(tinthusi), H62, HPB59-1 (ithusi), i-QAZ19-2, i-QA19-4(ithusi le-aluminium). Ikhopha yokushisa okuphezulu: Ifanele imikhiqizo ye-steam ne-petroleum ene-pressure yegama elithi PN≤ 17.0mpa kanye nezinga lokushisa ≤570℃. Uhlobo olusetshenziswa kakhulu i-ZGCr5Mo, 1 cr5m0. I-ZG20CrMoV, ZG15Gr1Mo1V, 12 crmov WC6, WC9, njll. Ukukhetha okuqondile kufanele kuhambisane nokucindezela kwe-valve kanye nokucaciswa kwezinga lokushisa.