inaliti iValve yePlunger yolawulo lokuhamba kwamanzi iregulaiton yoxinzelelo

Ivalve yeplunger inecandelo lomnqamlezo we-annular kuyo nayiphi na indawo evulekileyo. I-valve inolawulo olufanelekileyo lokuziphatha okuvelisa i-turbulence ephantsi phezulu kunye ne-cavitation ephantsi. Indawo yokuphuma

ukuqukuqela kuyajika ukuya kumbindi wombhobho ngoko ke ukuba nawaphina amaqamza omphunga aye enziwa, aya embindini egxunyekwe ngamanzi ngaphandle komonakalo. I-plunger iqhutywa ngumatshini we-rod-crank kwaye inokubonelelwa ngeesilinda ezongezelelweyo zokulungelelanisa ukwenza ijika lokuziphatha kwevalve kwiimfuno zofakelo. I-valve eguquguqukayo, ene-torque ephantsi, enokusetyenziswa njenge-valve yokulawula (ukuhamba, uxinzelelo, inqanaba, ukupompa) kunye ne-valve yokukhupha ephantsi okanye i-turbine bypass.

Ulwakhiwo ngolu ngezantsi:

Uyilo lweeNdawo:

Iimbonakalo:

Yila acc. Ukwenza i-Std okanye i-EN 1074-5

Uluhlu lobungakanani: DN150 - DN2200

Uluhlu loxinzelelo: PN10, PN16, PN25, PN40 PN63 (CLASS 150 LBS & CLASS 300LBS)

IiFlanges ukuya kwi-EN 1092-2 / ANSI B16.5, ANSI B16.47A

Izinto ezifumanekayo

Izinto zoMzimba: I-Ductile iron body EN-JS 1030 (GGG-40) , GGG50, WCB

Umphezulu: Ngaphakathi nangaphandle epoxy-coated ubuncinane 250 μm

I-Plunger 1.4301 * Izitywina ze-EPDM * Amalungu angaphakathi kunye ne-rod-crank mechanism kwi-Stainless Steel Auto lubricating iibheringi ze-shaft ezingenazo ukulungiswa.

Isikhokelo sepiston sokwaleka kobhedu

Iibholiti zentsimbi A4 (EN ISO 3506)

Ukhetho lokuSebenza:

Amathuba eActuator: ivili lesandla kunye nebhokisi yegiya, i-actuator yombane, i-pneumatic actuator, i-hydraulic brake-and-lift cylinder, umqhubi wenqwelomoya ophakathi olawulwayo.

ukwenza ubungakanani beValve:

Silinganisa ivalve echanekileyo ngokwedatha yenkqubo ethile, nceda unikeze oku kulandelayo 1) Uxinzelelo lokungena

2) Uxinzelelo lwe-Outlet

3) Ngenye indlela, uxinzelelo olufunwayo olufunekayo

4) Isantya sokuhamba

siya kubonelela ngexabiso le-Kvs kunye negrafu yokuhamba komsebenzi wokulawula ivalve.

Apho:

Kv = i-valve flow coefficient (ukuhamba nge-m'/h kwi-1bar Diff. Cinezela.)

I-CV = i-valve flow coefficient (ukuhamba kwi-gpm e-Diff. Cinezela. 1 psi)

Q=Isantya sokuhamba (m3/h ; gpm)

AP = Uxinzelelo olwahlukileyo (ibha; psi)

Gf = Umxhuzulane okhethekileyo wolwelo (Amanzi=1.0)

Apho:

K=Ukuchasana nokuqukuqela okanye ilahleko yeNtloko (ingenamlinganiselo)

AH = Ukulahleka kwentloko (m; iinyawo)

V= Isantya sokuqukuqela sobungakanani begama (m/sec; iinyawo /umzuzwana)

g=Ukukhawuleza komxhuzulane (9.81 m/sec^2, 32.18 iinyawo/umzuzwana^2)

Ungayikhetha njani i-outlet Design:

• I-Cavitation iyenzeka

Kukho iimfuno ezintathu ezisisiseko zokuba i-cavitation yenzeke. Okokuqala, kufuneka kubekho amaqamza egesi (i-nuclei) okanye i-voids kulwelo olusebenza njengesiseko sokwenza umphunga. Okwesibini, uxinzelelo lwangaphakathi kulwelo kufuneka lwehle ukuya okanye ngaphantsi koxinzelelo lomphunga. Okwesithathu, uxinzelelo olujikeleze iqamza lomphunga kufuneka libe likhulu kunoxinzelelo lomphunga ukuze liwohloke.

• Ukuphelisa i-cavitation: (Uyilo lwe-Anti-cavitation yevalve yeplunger)

Ukuthintela kunye nokukhuselwa kwe-Cavitation kuyingqwalasela ebalulekileyo ekuyilweni kunye nokusebenza kweevalve ezisetyenziswa kwiinkqubo zokuhambisa amanzi. Omnye kufuneka akwazi ukugqiba ukuba i-cavitation ikhona, kwaye ukuba kunjalo ukuqina kwayo kunye nemiphumo kwinkqubo. I-Cavitation kwi-valve yimeko eyonakalisayo echaphazela kakhulu ukusebenza kunye nenkonzo yevalve kwaye yenzeka xa ulwelo oludlula kwivalve luthoba kuxinzelelo lomphunga wolwelo olubangela umphunga.

imingxuma (amaqamza) ukwenza. Xa i-fluid idlula kwindawo yoxinzelelo oluphantsi ukuya kwindawo yoxinzelelo oluphezulu, i-vapor cavity iyancipha kwaye iyawa. Oku kudilika yinto enokuthi iviwe okanye ibonwe ngamanye amaxesha kwaye sisizathu sokuba kufuneka sikhathazeke malunga nobukho bayo kwiinkqubo zemibhobho. Ukudilika kunokuba nobundlobongela kwaye kukhatshwa yingxolo, ukungcangcazela, kunye nomonakalo wokhukuliseko olunokwenzeka kwivalve okanye umbhobho ojikelezileyo.

Umzobo weCavitation 'sigma'

Umngcipheko we-cavitation kwiivalvu zenaliti unokuvavanywa kusetyenziswa le equation ilandelayo: σ> σL

Ivalve ayizukusebenza phantsi kwecavitation de kube σ> σL.

Iphi:

• Ixabiso le-Cavitation σ = Pout / (ΔP + v2/2g)
• Umda weCavitation σL bona umzobo
• ΔP = ukulahleka kwentloko [mhw]
• I-Pout = uxinzelelo lwevalvu yokuphuma
• v = isantya se-fl uid esibhekiselwe kwi-DN [m/s]
• g = 9.81 m/s2

Ivalve AYIKUQHUBEKA ISEBENZA PHANTSI KWEMIQESHO YOMNGCIPHEKO WE-CAVITATION. IYAKWAMKELWA UKUBA IVALVI ISEBENZA NGAPHANTSI KWEMIQATHANGO YE-CAVITATION ENCINANE NGAMAXESHA AMAFUTSHANE.