Reverse running sipidhi (Reverse running speed) zvinoreva kumhanya (kunodaidzwa zvakare kuti spidhi yekudzokera, reverse speed) yeyakadzika zvakanaka vertical turbine pombikana mvura ichiyerera nepapombi ichidzokera kumashure pasi peumwe musoro (ndiko kuti, musiyano wemusoro uzere pakati pepombi yekubuda nepombi nepombi yekukweva).

Mamiriro ezvinhu aya anogona kuitika mumasisitimu ane system hunhu hwecurve ine yakakwira static musoro (Hsys, 0), asiwo mune yakadzika zvakanaka vertical turbine pombi inoshanda zvakafanana. 

Apo pombi yepombi inovhara zvisingatarisirwi, vheji yekuongorora inobuda inokundikana, uye pombi yekubuda yakazaruka, nzira yemvura kuburikidza nepombi ichadzorerwa shure, uye pombi rotor inotenderera kune reverse kushanda nokukurumidza mushure mokunge nzira yekuyerera yachinja.

Reverse inoshanda kumhanya inowanzo kukwirira zvakanyanya kupfuura yakajairwa yekushanda kumhanya uye zvinoenderana nemamiriro ehurongwa (kunyanya ikozvino kudzvanywa) uye chaiyo kumhanya kwepombi (ns). Iyo yakanyanya kureverse inoshanda kumhanya kwepombi inoyerera yeradial (ns ≈ 40 r/min) inenge 25% yakakwirira kudarika yakajairika yekushanda yepombi, nepo iyo yakanyanya kureverse inoshanda kumhanya kweaxial flow pump (ns ≥ 100 r/min. ) yakakwirira kudarika yakajairika kushanda kumhanya kwepombi. Inomhanya 100% nekukurumidza.

Aya maitiro ekushanda anogonawo kuitika kana chinhu chekuvhara chinoshandiswa kudzivirira pakusvetwa kwemhepo (sando yemvura) isiri cheki valve asi inononoka-kuvhara yekuvhara chinhu. Mazhinji emvura yakadzoserwa inogona kuyerera ichibuda nepakadzika tsime vertical turbine pombi.

Kana kuputika kwekuwedzera kunokonzerwa nekukundikana kwesimba muchikwata chemotokari uye pasina cheki chevhavha inoiswa, pombi shaft ichatendererawo kune imwe nzira. Munguva iyi, kunyatsotarisisa kunofanirwa kubhadharwa kune njodzi dzinosanganisirwa nemabearings akajeka uye ma mechanical seals anongoshanda mune imwe nzira yekutenderera, pamwe nekukwanisa kusunungurwa kwema threaded fasteners pane inotenderera shafts.

Kana svikiro rekudzoka riri pedyo nepanofashaira, svikiro rinogona kupfava kana pombi kana kuti pressure side throttling device inodzikisira.

Iyo yekudzokera kumashure yekumhanya yemhepo ine mhute (yekudzoka) inoyerera maringe nekuyerera kwemvura, sekushanda kweskweya mudzi wemvura/mhute density reshiyo, inogona kukwira kune zvine njodzi.

Kana mota yekutyaira ikabatidzwa mune yakadzika tsime vertical turbine pombi inotenderera yakatarisana neyakajairwa nzira yekutenderera, nguva yekutanga-yepombi seti ichave yakareba zvakanyanya. Mune iyi mamiriro ekushanda, kune asynchronous motors, kuwedzera tembiricha kukwira kwemota kunofanirwawo kucherechedzwa.

Matanho akakodzera chete anogona kutorwa kudzivirira kukuvadzwa kwepombi yakaiswa kunokonzerwa nekunyanyisa reverse kumhanya kumhanya.

Countermeasures kudzivirira reverse kumhanya kumhanya kubva pakunyanya kukwira zvinosanganisira:

1) Isa mechanical anti-reverse device (yakadai sechigadziro chekuvhara shure) pane pombi shaft;

2) Isa yakavimbika yekuzvivhara yega-yenzira yekutarisa valve (yakadai sevhavha yekutarisa inotenderera) papombi yekubuda pombi.

Cherechedza: Anti-reverse mudziyo unoshandiswa kudzivirira pombi kubva kumashure. Pakati pavo, iyo backflow blocking device inoshanda maererano nenheyo yekutenderera mberi pasina chipingamupinyi. Kamwe kutenderera kwekutenderera kwe shaft kuchidzoserwa shure, kutenderera kwe rotor kuchamiswa pakarepo.