Kusakwana kwepombi dhizaini / kurongeka kunogona kutungamirira kumatambudziko akadai se hydraulic instability uye cavitation mune pombi system. Kuti udzivise cavitation, kutarisa kunofanirwa kuiswa pane dhizaini yekusveta pombi uye suction system. Cavitation, recirculation yemukati uye kupindira kwemhepo kunogona kutungamirira kumazinga akakwirira eruzha uye vibration, izvo zvinogona kukuvadza zvisimbiso uye mabheji.

Pump Circulation Line

Apo a horizontal split case pombi inofanira kushanda panzvimbo dzakasiyana-siyana dzekushanda, mutsara wekutenderera unogona kudiwa kuti udzose chikamu chepombi yemvura kune pombi yekusveta side. Izvi zvinobvumira pombi kuti irambe ichishanda zvakanaka uye yakavimbika paBEP. Kudzorera chikamu chemvura inorasa rimwe simba, asi kumapombi maduku, simba rakarasika rinogona kunge risina basa.

Mvura inotenderera inofanira kudzoserwa kutsime rekusveta, kwete kumutsetse wekusveta kana pombi inopinza pombi. Kana ikadzoserwa kumutsara wekusveta, zvinokonzeresa nyonganyonga pakusveta kwepombi, zvichikonzera matambudziko ekushanda kana kutokuvadza. Mvura yakadzorerwa inofanira kuyerera ichidzokera kune rumwe rutivi rwekusveta, kwete kunzvimbo yekukweva yepombi. Kazhinji, kurongeka kwakakodzera kwebaffle kana mamwe madhizaini akafanana anogona kuve nechokwadi chekuti mvura yekudzoka haikonzere nyonganyonga panzvimbo yekusveta.

Parallel Kushanda

Kana imwe hombe horizontal split case pombi hazvigoneke kana kune mamwe maapplication ekuyerera kwepamusoro, pombi diki dzakawanda dzinowanzodikanwa kuti dzishande dzakafanana. Semuyenzaniso, vamwe vanogadzira pombi vangasakwanisa kupa hombe yakakwana pombi yepombi yekuyerera yakakura. Mamwe masevhisi anoda kuwanda kwekufamba kwekushanda uko pombi imwe chete haigone kushanda mune zvehupfumi. Kune aya masevhisi akayerwa epamusoro, kuchovha bhasikoro kana kushandisa pombi kure neBEP yavo kunogadzira kutambisa kwakakosha kwesimba uye nyaya dzekuvimbika.

Kana pombi dzichishandiswa zvakafanana, pombi imwe neimwe inoburitsa kuyerera kushoma pane zvayaizoita dai yaishanda yoga. Kana pombi mbiri dzakafanana dzichishandiswa dzakafanana, kuyerera kwese kunopfuura kaviri kuyerera kwepombi imwe neimwe. Parallel Operation inowanzo shandiswa seyekupedzisira mhinduro kunyangwe yakakosha application zvinodiwa. Semuenzaniso, muzviitiko zvakawanda, mapombi maviri anoshanda pamwe chete ari nani pane matatu kana kupfuura mapombi anoshanda pamwe chete, kana zvichibvira.

Parallel kushanda kwemapombi kunogona kuva kune ngozi uye kusagadzikana kushanda. Pombi dzinoshanda dzakafanana dzinoda kunyatsoyera saizi, kushanda, uye kutarisa. Macurves (kuita) kwepombi imwe neimwe inoda kufanana - mukati me2 kusvika ku3%. Yakasanganiswa pombi macurves inofanira kuramba yakati sandara (yepombi dzinomhanya dzakafanana, API 610 inoda kukwidziridzwa kwemusoro kweinenge gumi muzana yemusoro payakatemerwa kuyerera kunzvimbo yakafa).

Horizontal Split Nyaya Pump Kupomba

Magadzirirwo epombi asina kunaka anogona kutungamira nyore kune yakawandisa pombi vibration, matambudziko ekubereka, matambudziko echisimbiso, kutadza kusati kwasvika kwepombi zvikamu, kana kutadza kwakaipisisa.

Suction piping inonyanya kukosha nekuti mvura inofanirwa kunge iine mashandisirwo akakodzera, senge kudzvanywa uye tembiricha, kana yasvika pagomba rekusveta pombi. Smooth, yunifomu inoyerera inoderedza njodzi ye cavitation uye inobvumira pombi kushanda zvakavimbika.

Mapaipi nemadhayamita emugero zvine chekuita nemusoro. Sekufungidzira kwakakasharara, kurasikirwa kwesimba nekuda kwekukweshana kunopesana nechikamu chechishanu chedhayamita yepombi.

Semuenzaniso, kuwedzera kwe10% mudhayamita yepombi kunogona kuderedza kurasikirwa kwemusoro neanenge 40%. Saizvozvo, kuwedzera kwe20% mudhayamita yepombi kunogona kuderedza kurasikirwa kwemusoro ne60%.

Mune mamwe mazwi, kukanganiswa kwemusoro kurasikirwa kunenge kuri pasi pe40% yekurasikirwa kwemusoro kwedhayamita yepakutanga. Kukosha kwemambure akanaka ekuyamwa musoro (NPSH) mukupomba maapplication kunoita kuti dhizaini yepombi yekudhonza pombi chinhu chakakosha.

Kusveta pombi kunofanira kunge kuri nyore uye kwakatwasuka sezvinobvira, uye hurefu hwakazara hunofanira kudzikiswa. Mapombi eCentrifugal anofanirwa kunge aine kureba kwakatwasuka kwe6 kusvika ku11 nguva yedhayamita yepombi yekusveta kudzivirira mhirizhonga.

Masefa ekusveta kwenguva pfupi anowanzodiwa, asi mafirita echigarire haawanzokurudzirwa.

Kuderedza NPSHR

Panzvimbo yekuwedzera iyo unit NPSH (NPSHA), mapaipi uye magadzirirwo mainjiniya dzimwe nguva anoedza kudzikisa inodiwa NPSH (NPSHR). Sezvo NPSHR iri basa rekugadzira pombi uye kumhanya kwepombi, kuderedza NPSHR inzira yakaoma uye inodhura ine sarudzo shoma.

Iyo impeller suction orifice uye hukuru hwese hweiyo yakachinjika split kesi pombi zvakakosha kufunga mukugadzira pombi uye kusarudza. Mapombi ane hombe yekusveta orifices anogona kupa yakaderera NPSHR.

Nekudaro, mahombe ekusveta orifices anogona kukonzera mamwe ekushanda uye emvura ane simba matambudziko, senge nyaya dzekudzokorora. Mapombi ane kumhanya kwakaderera kazhinji ane yakaderera inodiwa NPSH; pombi dzine kumhanya kwepamusoro dzine yakakwirira inodiwa NPSH.

Mapombi ane akagadzirwa akakura ekuyamwa orifice impeller anogona kukonzera yakakwira kudzokorodza nyaya, izvo zvinodzikisira kugona uye kuvimbika. Mamwe mapombi eNPSHR akaderera akagadzirwa kuti ashande nekumhanya kwakaderera zvekuti kuita kwese hakuna hupfumi hwekushandisa. Aya mapombi akaderera anewo kuvimbika kwakaderera.

Mapombi mahombe ekumanikidza anoiswa pasi pezvipingamupinyi zvesaiti senge pombi nzvimbo uye yekudhonza mudziyo / tangi marongero, izvo zvinotadzisa mushandisi wekupedzisira kuwana pombi neNPSHR inosangana nezvipingamupinyi.

Mumapurojekiti akawanda ekugadzirisa / kugadzirisa, nzvimbo yesaiti haigoni kuchinjwa, asi pombi yakakura yepamusoro ichiri kudiwa panzvimbo. Muchiitiko ichi, pombi inosimudzira inofanira kushandiswa.

Pombi inosimudzira ipombi inomhanya yakaderera ine NPSHR yakaderera. Pombi inosimudzira inofanirwa kunge iine mwero wekuyerera wakafanana nepombi huru. Pombi yebooster inowanzoiswa kumusoro kwepombi huru.

Kuziva Chikonzero cheVibration

Kuyerera kwakaderera (kazhinji kusingasviki 50% yekuyerera kweBEP) kunogona kukonzera matambudziko akati wandei emvura, kusanganisira ruzha uye kudedera kubva kune cavitation, mukati recirculation, uye mhepo intrainment. Mamwe mapombi akapatsanurwa anogona kuramba kusagadzikana kwekukweva kudzokororwa pamitengo yakaderera yekuyerera (dzimwe nguva yakaderera se35% yekuyerera kweBEP).

Kune mamwe mapombi, kusveta kudzokororwa kunogona kuitika panenge pa75% yekuyerera kweBEP. Suction recirculation inogona kukonzera kumwe kukuvadzwa uye gomba, zvinowanzoitika pakati pepakati pepombi impeller blades.

Outlet recirculation is hydrodynamic instability iyo inogonawo kuitika pakuyerera kwakaderera. Kudzokororwa uku kunogona kukonzerwa nekucheneswa kusina kufanira padivi rekubuda reimpeller kana impeller shroud. Izvi zvinogona zvakare kutungamira kugomba uye kumwe kukuvadzwa.

Mabhubhu ehutsi mukuyerera kwemvura anogona kukonzera kusagadzikana uye kudedera. Cavitation kazhinji inokuvadza chiteshi chekuyamwa che impeller. Ruzha uye kudedera kunokonzerwa necavitation kunogona kutevedzera kumwe kutadza, asi kuongororwa kwenzvimbo yegomba uye kukuvadzwa papombi impeller kunowanzo ratidza chinokonzera.

Kupinzwa kwegasi kwakajairika pakupomba zvinwiwa padhuze nepanofashaira kana pakaoma pombi yekusveta ichikonzera nyonganyonga.