Ekukhetheni iimpompo zamanzi, ukuba ukhetho alufanelekanga, iindleko zinokuthi zibe phezulu okanye ukusebenza kwangempela kompompo akunakuhlangabezana neemfuno zesayithi. Ngoku nika umzekelo ukubonisa imigaqo ethile ekufuneka ilandelwe yimpompo yamanzi.
Ukukhethwa kwempompo yokufunxa kabini kufuneka kuthathelwe ingqalelo kula manqaku alandelayo:
1. Isantya:
Isantya esiqhelekileyo simiselwa ngokweemfuno ezinikiweyo zomthengi. Isantya esisezantsi sempompo efanayo, izinga lokuhamba elihambelanayo kunye nokuphakamisa kuya kuncipha. Xa ukhetha imodeli, kuyimfuneko ukuqwalasela kuphela ukusebenza kwezoqoqosho, kodwa kunye neemeko zesayithi, ezinje: i-viscosity ye-medium, i-resistance resistance, i-self-priming, i-vibration factor, njl.
2. Ukumiselwa kweNPSH:
I-NPSH inokumiselwa ngokwexabiso elinikwe ngumthengi, okanye ngokweemeko zokungena kwimpompo, ubushushu obuphakathi kunye noxinzelelo lwe-atmospheric kwindawo:
Ubalo lobude bofakelo lwempompo yamanzi (i-algorithm elula: ngokoxinzelelo oluqhelekileyo lwe-atmospheric kunye nobushushu obuqhelekileyo bamanzi) lulandelayo:
Phakathi kwazo: i-hg-ubude bofakelo lwejometri (ixabiso elihle liyi-suction up, ixabiso elibi liyi-reverse flow);
-Intloko yamanzi yoxinzelelo lwe-atmospheric kwindawo yofakelo (ibalwe njenge-10.33m phantsi koxinzelelo oluqhelekileyo lwe-atmospheric kunye namanzi acocekileyo);
hc-ukufunxa ilahleko ye-hydraulic; (ukuba umbhobho wokungena mfutshane kwaye awunzima, udla ngokubalwa njenge-0.5m)
-Intloko yoxinzelelo lomoya; (amanzi acacileyo kwiqondo lobushushu begumbi abalwa njenge-0.24m)
- I-NPSH evumelekileyo; (ukuqinisekisa ukhuseleko, ukubala ngokweNPSHr×1.2, NPSHr bona ikhathalogu)
Umzekelo, i-NPSH NPSHr=4m: Emva koko: hg=10.33-0.5-0.24-(4×1.2)=4.79 m (isiphumo sokuhlaliswa sixabiso elihle, oko kuthetha ukuba inokufunxa ukuya kuthi ga ku-≤4.79m, oko kukuthi , inqanaba lokungena kwamanzi linokuba kwi-impeller Ngaphakathi kwe-4.79m ngaphantsi komgca ophakathi, ukuba iphantsi koxinzelelo olubi, kufuneka igalelwe ngasemva, kwaye ixabiso lokugalela ngasemva kufuneka libe likhulu kunexabiso elibaliweyo, oko kukuthi, amanzi; inqanaba lokungena linokuba ngaphezu kwexabiso elibalwe ngaphezu komgca ophakathi we-impeller).
Oku ngasentla kubalwa phantsi kwemeko yokushisa okuqhelekileyo, amanzi acacileyo kunye nokuphakama okuqhelekileyo. Ukuba iqondo lokushisa, ubuninzi kunye nokuphakama kwe-medium akuqhelekanga, ukwenzela ukuba ugweme i-cavitation kunye nezinye iingxaki ezichaphazela ukusebenza okuqhelekileyo kwempompo yokumisela, amanani ahambelanayo kufuneka akhethwe kwaye afakwe kwifomula yokubala. Phakathi kwabo, iqondo lokushisa kunye noxinzelelo lwe-medium libalwa ngokwemilinganiselo ehambelanayo "kwi-Vaporization Pressure kunye noxinzelelo lwamanzi kumaqondo ahlukeneyo", kwaye ukuphakama kubalwa ngokwemilinganiselo ehambelanayo "kwi-Altitude kunye ne-Atmospheric Pressure ye-Major Cities in. ilizwe". Enye i-NPSH evumelekileyo kukuqinisekisa ukhuseleko, ngokwe-NPSHr×1.4 (eli xabiso ubuncinane li-1.4).
3. Xa ukunyanzeliswa kwe-inlet yempompo yesiqhelo ngu-≤0.2MPa, xa uxinzelelo lwe-inlet + intloko × 1.5 amaxesha ≤ uxinzelelo lwengcinezelo, khetha ngokwezinto eziqhelekileyo;
Uxinzelelo lwe-inlet + intloko × amaxesha e-1.5 > uxinzelelo lokunciphisa, izinto eziqhelekileyo ezihlangabezana neemfuno kufuneka zisetyenziswe; ukuba uxinzelelo lwe-inlet luphezulu kakhulu okanye uxinzelelo lokuvavanya luphezulu kakhulu, njl.n
I-4.Iimodeli ze-conventional pump mechanical seal zezi: M7N, M74 kunye ne-M37G-G92 uchungechunge, ngubani oza kusebenzisa kuxhomekeke kuyilo lwempompo, izinto eziqhelekileyo zokutywinwa komatshini: i-hard / soft (tungsten carbide / graphite); xa uxinzelelo lokungena luyi-≥0.8MPa, Kufuneka kukhethwe uphawu olulungelelanisiweyo lomatshini;
5. Kucetyiswa ukuba ubushushu obuphakathi bempompo yokufunxa kabini akufanele budlule kwi-120 ° C. Xa i-100 ° C ≤ iqondo lokushisa eliphakathi ≤ 120 ° C, umpompo oqhelekileyo kufuneka ulungiswe: indawo yokutywina kunye nenxalenye yokuthwala kufuneka ixhotyiswe ngamanzi okupholisa ngaphandle kwendawo yokupholisa; zonke O-amakhonkco impompo zenziwe Zombini ukusetyenziswa: irabha fluorine (kubandakanywa umatshini uphawu).
Ixesha lokuposa: May-10-2023