1. Uhlolojikelele Lwesigameko

Isistimu yokupholisa yeyunithi engu-25 MW isebenzisa okubili  amaphampu e-casing ehlukanisayo. Idatha ye-nameplate yephampu ngayinye:

Ukugeleza (Q): 3,240 m³/h

Ikhanda lokuklama (H): 32 m

Isivinini (n): 960 rpm

Amandla (Pa): 317.5 kW

I-NPSH iyadingeka (Hs): 2.9 m (≈ 7.4 m NPSHr)

Phakathi nezinyanga ezimbili nje, i-pump impeller eyodwa yabhobozwa ngenxa yokuguguleka kwe-cavitation.

2. Uphenyo Lwenkundla & Ukuxilonga

Ukufundwa kokucindezela kugeji yokukhipha: ~0.1 MPa (ngokuqhathaniswa nokulindelekile ~0.3 MPa ngekhanda elingu-32 m)

Izimpawu eziphawuliwe: ukuguquguquka kwezinaliti ezinobudlova kanye nemisindo ye-cavitation "ephumayo".

Ukuhlaziywa: Iphampu ibisebenza kude kwesokudla se-Best Efficiency Point (BEP), iletha kuphela ~ 10 m ikhanda kune-32 m.

3. Ukuhlolwa Kwendawo Nokuqinisekisa Imbangela Yembangela

Ama-opharetha acindezela kancane i-valve yokukhipha iphampu:

Ukucindezela kokukhipha kukhuphuke kusuka ku-0.1 MPa kuya ku-0.28 MPa.

Umsindo we-Cavitation uphelile.

Ivacuum ye-Condenser ithuthukisiwe (650 → 700 mmHg).

Umehluko wezinga lokushisa kuyo yonke i-condenser yehlile ukusuka ku-~33 °C ukuya ku-<11 °C, okuqinisekisa izinga lokugeleza elibuyiselwe.

Isiphetho: I-Cavitation yabangelwa ukusebenza okuhambisanayo kwekhanda eliphansi / eliphansi, hhayi ukuvuza komoya noma ukuhluleka kwemishini.

4. Kungani Ukuvala I-Valve Kusebenza

Ukuphonseka kokukhishwayo kukhulisa ukumelana nesistimu, kushintsha indawo yokusebenza yephampu kwesokunxele iye ku-BEP yayo—ukubuyisela ikhanda nokugeleza okwanele. Nokho:

Ivalvu kufanele ihlale kuphela ~ 10% evulekile—isimo sokuguga nokungasebenzi kahle.

Ukugijima ngokuqhubekayo ngaphansi kwalezi zimo ze-throttled akunamali futhi kungabangela ukulimala kwamavalvu.

5. Isu Lokuphatha Nesixazululo

Uma kubhekwa izici zephampu zangempela (ikhanda lamamitha angu-32) kanye nesidingo sangempela (~12 m), ukusika i-impeller bekungakwazi ukusebenza. Isixazululo esinconyiwe:

Yehlisa isivinini semoto: ukusuka ku-960 rpm → 740 rpm.

Hlela kabusha i-impeller geometry ukuze usebenze kahle ngesivinini esiphansi.

Umphumela: I-Cavitation isusiwe futhi ukusetshenziswa kwamandla kuncishiswe kakhulu-kuqinisekiswe ekuhlolweni okulandelwayo.

6. Izifundo Ezitholiwe

Usayizi njalo i-casing casing amaphampu eduze kwe-BEP yawo ukugwema ukulimala kwe-cavitation

Gada i-NPSH—NPSHa kumelwe yeqe i-NPSHr; i-throttle control iyi-band-aid, hhayi ukulungisa

Amakhambi amakhulu:

Lungisa usayizi we-impeller noma isivinini sokujikeleza (isb, i-VFD, i-belt drive),

Isistimu yokuphinda ipayipi ukuze uthuthukise ikhanda lokuphuma,

Qinisekisa ukuthi ama-valve anosayizi ngendlela efanele futhi ugweme ukugijima amaphampu ampintsheke unomphela

Sebenzisa ukuqapha kokusebenza ukuze uthole ukusebenza kwekhanda eliphansi, ukugeleza okuphansi kusenesikhathi.

7. Isiphetho

Leli cala ligqamisa isidingo sokuqondanisa ukusebenza kwepompo nokucaciswa komklamo wayo. Iphampu ye-split casing pump ephoqelelwe ukuthi isebenze kude ne-BEP yayo izovuleka-ngisho noma ama-valve noma izimpawu zibonakala zilungile. Ukulungisa njengokuncishiswa kwesivinini kanye nokwakhiwa kabusha kwe-impeller akugcini nje ukwelapha i-cavitation kodwa kuthuthukisa ukusebenza kahle kwamandla jikelele.