Impeller trimming ndi njira yomwe imagwiritsidwa ntchito kwambiri posinthira magwiridwe antchito a   mapampu oyimirira a turbine,makamaka mu submersible ntchito. Pochepetsa m'mimba mwake akunja kwa choyikapo, mainjiniya amatha kutsitsa mutu ndikuyenderera kuti agwirizane bwino ndi momwe amagwirira ntchito. Komabe, kudula molakwika kumatha kusokoneza kwambiri magwiridwe antchito, kuonjezera chiwopsezo cha cavitation, ndikuwononga pampu kwa nthawi yayitali. Kumvetsetsa sayansi ndi malire kumbuyo kwa chowongolera chowongolera ndikofunikira kuti pakhale ntchito yotetezeka komanso yothandiza.

I. Kodi Malamulo Ogwirizana Amagwira Ntchito Motani pa Kuchepetsa kwa Impeller?

1. Maubale Ogwirizana:

- Mukadula chiwongolero kuchokera ku D2 kupita ku D2′ (mkati mwa 20% ndi ngodya ya β2 yosasinthika):

- Yendani (Q) ∝ D2′/D2

- Mutu (H) ∝ (D2′/D2)^2

- Mphamvu (P) ∝ (D2′/D2)^3

2. Malire a Uinjiniya:

- Kudula kwambiri: 15-20% ya mainchesi oyambirira. Kupitilira munjira iyi kumasintha njira yotulutsira tsamba, zomwe zimapangitsa kutayika kwakukulu.

- Zolepheretsa Kuthamanga Kwapadera: Mapampu othamanga kwambiri (ns> 60) amakhudzidwa kwambiri ndi kudula.

II. Kodi Zotsatira Zazikulu Zotani za Impeller Trimming?

1. Kuchepetsa Kopanda Mzere mu Kuyenda ndi Mutu:

- Kutayika kwamutu kumatha kupitilira zongoyerekeza pokonza> 10%, chifukwa cha chipwirikiti cha nsonga ya tsamba komanso kupatukana kwamadzi.

2. Kutsitsa Mwachangu ndi Malo Olowera:

- Kuchepetsa <10%: Kuchita bwino pamapindikira kumasintha pang'ono (≤3%).

- Kuchepetsa> 15%: Kutsika kwachangu kumakhala kotsika-mpaka 18% pazochitika zowonedwa.

- Kudula kumatha kukulitsa kubwereza kwa inlet, kukulitsa NPSHr ndi 10-30%.

- Izi zimafuna kuwerengeranso kupezeka kwa NPSHa kuti mupewe ngozi ya cavitation.

III. Momwe Mungachepetsere Ma Impeller Molondola Kwa Mapampu Oyimilira a Turbine

1. Njira Zochepetsera Zovomerezeka :

- Machining: Ndiabwino kwa zoyika zitsulo (mwachitsanzo, chitsulo choponyedwa, chitsulo chosapanga dzimbiri); sungani ≥70% makulidwe ansonga ya tsamba.

- Kudula kwa Plasma + Kupera: Koyenera zopangira zophatikizika kuti mupewe kuwonongeka kwamafuta.

2. Kuyang'ana Pambuyo Pocheka :

- Mayeso a Balance Dynamic: Onetsetsani kuti zotsalira sizikuyenda bwino ≤ G6.3 (ISO 1940); kusalinganizika kumawonjezera chiopsezo cha vibration.

- Malangizo a Chamfer Blade: Mphepete mwa nsonga yozungulira mpaka R ≥ 1 mm kuti mupewe kupsinjika ndi kusweka.

3. Zochitika Zomwe Kucheka Kuyenera Kupewa:

- Zowongolera zomaliza pamapampu amitundu yambiri (chiwopsezo cha axial imbalance).

- Mapangidwe otsekera otsekedwa (kudula kumasokoneza njira zolowera mkati).

- Kugwiritsa ntchito ma abrasive media (kuchepetsa kukana kukaniza pambuyo pochepetsa).

Kudula kwa ma turbine pamapampu oyimirira sikuyenera kutengedwa ngati ntchito yosavuta yopangira makina. Ndi njira yolondola yomwe imalinganiza chiphunzitso cha hydraulic, kulimba kwa zinthu, komanso kulolerana kwamakina. Mainjiniya amayenera kumvetsetsa momwe magwiridwe antchito amagwirira ntchito, kukhalabe ndi malire ochepetsera, komanso kupewa misampha yomwe imatsogolera pakupulumutsa mphamvu zabodza. Ndi kuunika kwasayansi ndi machitidwe abwino, kuwongolera kwa ma impeller kumakhala chida champhamvu chokulitsa luso, kudalirika, komanso kutsika mtengo pamapampu olowera pansi pamadzi.