Vese vashandisi nevagadziri vanotarisira axial split case pombi kuti ugare uchishanda panzvimbo yakanakisa inoshanda (BEP). Nehurombo, nekuda kwezvikonzero zvakawanda, mapombi mazhinji anotsauka kubva paBEP (kana kushanda pachikamu chemutoro), asi kutsauka kunosiyana. Nechikonzero ichi, zvinodikanwa kuti unzwisise kuyerera kwezviitiko pasi pemutoro wechikamu.

Chikamu chekushanda kwekutakura

Partial load operation inoreva mamiriro ekushanda kwepombi isingasviki mutoro wakazara (kazhinji nzvimbo yekugadzira kana nzvimbo yakanakisisa yekushanda).

Zvinoonekwa zviitiko zvepombi pasi pemutoro wechikamu

apo axial split case pombi inoshandiswa pachikamu chemutoro, inowanzoitika: kuyerera kwemukati, kuchinja kwemhepo (kureva, iyo inonzi simba rinofadza), kuwedzera kwemasimba emagetsi, kuwedzera kwekudengenyeka, uye kuwedzera ruzha. Muzviitiko zvakakomba, kuderedzwa kwekuita uye cavitation inogonawo kuitika.

Simba rinonakidza uye tsime

Pasi pemamiriro ezvinhu emutoro, kuyerera kuparadzaniswa uye kudzokororwa kunoitika mune impeller uye diffuser kana volute. Nekuda kweizvozvo, kudzvinyirirwa kwemhepo kunogadzirwa kwakatenderedza impeller, iyo inogadzira iyo inonzi inonakidza simba rinoshanda pane pombi rotor. Mumapombi anomhanya-mhanya, aya asina kugadzikana hydraulic masimba anowanzo kudarika ma mechanical unbalance forces uye naizvozvo anowanzo ari main source of vibration excitation.

Kudzokororwa kwekuyerera kubva kune diffuser kana volute kudzoka kune impeller uye kubva kune impeller kudzokera kuchiteshi chekuyamwa kunokonzera kusangana kwakasimba pakati pezvikamu izvi. Izvi zvine simba guru pakugadzikana kwemusoro-kuyerera kwepamusoro uye masimba ekusimudzira.

Iyo fluid yakadzokororwa kubva kune diffuser kana volute zvakare inopindirana nemvura iri pakati pe impeller sidewall uye casing. Nokudaro, ine simba pane axial thrust uye mvura inoyerera kuburikidza nepakati, iyo ine simba guru pane simba rekushanda kwepombi rotor. Nokudaro, kuti unzwisise kudengenyeka kwepombi rotor, kuyerera kwezviitiko pasi pemutoro wechikamu kunofanira kunzwisiswa.

Fluid flow phenomena pasi pechikamu chemutoro

Sezvo mutsauko uripo pakati penzvimbo yekushanda uye nzvimbo yekugadzira (kazhinji iyo yakanyanya kunaka poindi) zvishoma nezvishoma inowedzera (kuchinja ichienda kune kutungamira kudiki kuyerera), isina kugadzikana kufamba kwemvura kuchaumbwa pane impeller kana diffuser blades nekuda kweiyo isina kunaka nzira yekuyerera, izvo zvinozoita kuti kuyerera kuparadzaniswa (de-flow) uye mechanical vibration, pamwe chete nekuwedzera ruzha uye cavitation. Paunenge uchishanda pachikamu chemutoro (kureva kuti kuyerera kwakaderera), iwo blade profiles anoratidza kusagadzikana kuyerera kwezviitiko - iyo fluid haigone kutevera contour yedivi rekusveta remablades, izvo zvinotungamira mukuparadzaniswa kwekuyerera kwehukama. Kupatsanurwa kweiyo fluid boundary layer inzira isina kugadzikana yekuyerera uye inokanganisa zvakanyanya kutsauka uye kutendeuka kweiyo fluid pane blade profiles, izvo zvinodiwa mumusoro. Iyo inotungamira kune kudzvanywa pulsations yemvura yakagadziriswa mupombi inoyerera nzira kana zvinhu zvakabatana nepombi, vibrations uye ruzha. Pamusoro pekuparadzaniswa kweiyo fluid boundary layer, iyo inoramba isingafadzi chikamu chekutakura mashandiro maitiro eiyo split case pombi inobatwawo nekusagadzikana kweiyo yekunze chikamu chemutoro recirculation pane impeller inlet (inlet kudzoka kuyerera) uye yemukati chikamu chinotakura recirculation pane impeller outlet (outlet return flow). Iyo yekunze recirculation pane impeller inlet inoitika kana paine musiyano mukuru pakati pekuyerera (kuyerera kwepasi) uye nzvimbo yekugadzira. Muchikamu chemamiriro ekuremerwa, mafambiro ekuyerera kweiyo inlet recirculation yakatarisana neiyo huru yekuyerera kutungamira mupombi yekukwevera - inogona kuwonekwa iri chinhambwe inoenderana nemadhayamita akawanda ekusveta pombi munzira yakatarisana yekuyerera kukuru. Kuwedzera kweaxial kuyerera kweiyo recirculation kunorambidzwa, semuenzaniso, zvikamu, magokora uye shanduko muchikamu chepiipi yepipe. Kana axial kupatsanurwa pombi yemhosva ine musoro wakakwirira uye simba guru remotokari rinoshandiswa pachikamu chemutoro, muganhu wepasi, kana kunyange panzvimbo yakafa, simba guru rekubuda remutyairi richaendeswa kune mvura inobatwa, zvichiita kuti kupisa kwayo kukwire nokukurumidza. Izvi zvinozoita kuti vaporization yepombi yepakati iwedzere, iyo inokuvadza pombi (nekuda kwegap jamming) kana kutokonzera kuti pombi iparadze (kuwedzera kwehuputi hwemhepo).

Minimum inoenderera yakagadzikana yekuyerera mwero

Papombi imwe cheteyo, ishoma here inoenderera mberi yakagadzikana kuyerera (kana kuti muzana yeyakanakisa kuyerera kwepoinzi) yakafanana kana ichimhanya nekumhanya kwakatemwa uye nekumhanya kwakasiyana?

Mhinduro ndihongu. Nekuti iyo shoma inoenderera yakagadzikana yekuyerera mwero weiyo axial split kesi pombi ine hukama neiyo yekudhonza chaiyo kumhanya, kana pombi yemhando yechimiro saizi (kuyerera-kupfuura zvikamu) yakatemwa, kusveta kwayo kwakatarwa kumhanya kwakatemwa, uye huwandu umo pombi. inogona kushanda yakadzikama yakatemerwa (yakakura iyo yekusveta yakananga kumhanya, iyo diki pombi yakagadzikana yekushanda renji), ndiko kuti, iyo shoma inoenderera yakagadzikana yekuyerera kwepombi inotemwa. Naizvozvo, kune pombi ine imwe saizi yechimiro, ingave ichimhanya nekumhanya kwakamisikidzwa kana kuchinjika spidhi, diki yayo inoramba yakatsiga yekuyerera mwero (kana muzana yeakanakisa mashandiro ekuyerera kweyero) yakafanana.