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Ukhetho kunye noLawulo loMgangatho weempompo zeCasing Casing
ukuba impompo yecasing yokwahlula idibana neengxaki ngexesha lokusebenza, ngokuqhelekileyo sicinga ukuba ukhetho lwempompo alunakuba lufanelekileyo okanye lunengqiqo. Ukukhethwa kompompo okungenangqiqo kunokubangelwa kukungaqondi ngokupheleleyo iimeko zokusebenza kunye nokufakwa kwempompo, okanye ngokungaqwalaseli ngenyameko kunye nokuhlalutya imeko ethile.
Iimpazamo eziqhelekileyo kwi impompo yecasing yokwahlula ukhetho lubandakanya:
1. Uluhlu olusebenzayo phakathi kobuninzi kunye nobuncinci bezinga lokuhamba kwempompo alunqunywanga. Ukuba umpompo okhethiweyo ukhulu kakhulu, kuya kubakho "umda wokhuseleko" oqhotyoshelweyo kwintloko efunekayo kunye nokuhamba, okuya kubangela ukuba isebenze phantsi komthwalo ophantsi. Oku akugcini nje ukunciphisa ukusebenza kakuhle, kodwa kubangela ukungcangcazela okukhulu kunye nengxolo, nto leyo ebangela ukugqoka kunye ne-cavitation.
2. Ubuninzi bokuhamba kwenkqubo akuchazwanga okanye kulungiswe. Ukumisela ubuncinci bentloko efunekayo kuyo yonke inkqubo yempompo, ezi zinto zilandelayo kufuneka ziqwalaselwe:
2-1. Ubuncinci bevacuum;
2-2. Uxinzelelo oluphezulu lwe-inlet ngexesha lokusebenza;
2-3. Ubuncinci bentloko yokukhupha amanzi;
2-4. Ubude obuphezulu bokufunxa;
2-5. Ubuncinci bokumelana nemibhobho.
3. Ukuze kuncitshiswe iindleko, ubungakanani bempompo bukhethwa ngamanye amaxesha ngaphaya koluhlu olufunekayo. Oku kuthetha ukuba i-impeller idinga ukunqunyulwa kwinqanaba elithile ukufezekisa indawo yokusebenza echaziweyo. Kusenokubakho ukubuya umva kwi-impeller inlet, enokubangela ingxolo enkulu, i-vibration kunye ne-cavitation.
4. Iimeko zokufakela kwisayithi zempompo aziqwalaselwa ngokupheleleyo. Kubalulekile ukulungiselela umbhobho wokufunxa ngokufanelekileyo ukuqinisekisa iimeko zokungena ezilungileyo.
5. Umda phakathi kwe-NPSHA kunye ne-NPSH₃ (NPSH) ekhethwe yimpompo ayinkulu ngokwaneleyo, eya kubangela ukungcangcazela, ingxolo okanye i-cavitation.
6. Izinto ezikhethiweyo azifanelekanga (i-corrosion, i-wear, i-cavitation).
7. Amacandelo oomatshini asetyenziswayo awafanelekanga.
Kuphela ngokukhetha imodeli efanelekileyo ungenza icasing casing impompo iqinisekisiwe ukuba isebenze ngokuzinzileyo kwindawo yokusebenza efunekayo kwaye ukugcinwa kwempompo kunokuncitshiswa ngokufanelekileyo.