Kulungile iblade blade diameter inlet side Kwicala lokungena le-impeller ukuya kumbindi, njengoko umjelo wokuhamba wesangqa esibhaliweyo, isangqa esibhalwe kwi-centroid siphinda kabini umgama we-axis yecala lokungena le-blade diameter D1, eboniswe kuMfanekiso 5- 5 .
I-diameter D1 yecala lokungena kwi-blade inokuchongwa ngokubanzi isantya esithile ns : Ngokubanzi, ukwandisa inani lee-blades kunokuphucula ukuhamba kwamanzi, ukunyuka okufanelekileyo kwintloko yempompo, kodwa ukwandisa inani lelahleko ye-friction ye-leaf blade iya kwanda, ukunciphisa ukuhamba kwindawo yokuhamba.
Ngoko ke, ukwanda kwenani lamagqabi kakhulu, kungekhona nje ukunciphisa ukusebenza kakuhle kunye nokwenza i-impeller cavitation performance deterioration, kodwa ibangela ukuba i-pump performance curves hump (jonga iSahluko V).I-angle ye-blade phantsi kwephakheji efanayo, ukunciphisa inani lee-blades, i-blade nganye yomthwalo iyanda, indima ye-diversion fluid ephantsi, kodwa iyancipha nentloko yepompo.Ngandlel’ ithile ngaphantsi kwenani lojikelezo lwempompo, ukuba lwenzeke ngendlela yobude besithuba seblade, eboniswe kuMfanekiso 5-10.
Oku kuya kuqinisekisa inani elaneleyo lamagqabi , kodwa kwakhona ukukhusela i-impeller inlet blockage.8 Qinisekisa ukuba i-engile yeblade inlet β1 ibekwe I-engile yeblade inlet ibekwe ekungeneni kwencakuba, ubuso beblade be-tangent ( ukuthetha ngokuthe ngqo, umphezulu kufuneka ube kumgca wokuhamba kwe-blade tangent bone ) i-engile phakathi i-tangent ejikelezayo, njengoko kubonisiwe kuMfanekiso 5-6.Kucingelwa ukuba ulwelo sisishukumisi esijikelezayo sokuhamba ,umenzi wempompo enodakangonxantathu wesantya ubonisa: Ekumiseleni i-engile ye-vane inlet β1 indawo xa i-engile ye-△ β khetha isizathu:
( 1 ) phambi kokuba ulwelo lungene kwi-impeller , esele iphantsi kwegumbi lokufunxa , impembelelo yeshafti ye-impeller okanye intshukumo ejikelezayo ( oko kukuthi i- pre - spin ) , ukwandisa i-engile yohlaselo kukuqwalasela impembelelo ye- pre - swirl ukuya . ukunciphisa impembelelo yokulahleka kolwelo.
( 2 ) ithatha i-engile elungileyo yohlaselo , iblade yokungena exineneyo coefficient ., Ukunciphisa, oko kukuthi ukwandisa indawo yokungena kwi-blade, ukuphucula ukuhamba kwamanzi, kunokuphucula kancinci ukusebenza kwempompo ye-cavitation.
Kwigumbi lokufunxa ityhubhu yeconical, ulwelo lungena kwi-impeller phambi kokuba uhlengahlengiso lube ncinane, kodwa kwisiqingatha segumbi lokufunxa elijikelezayo li.I-prerotator inkulu, ngoko i-angle yokuhlaselwa kufuneka ithathelwe ingqalelo xa ukhetha isakhiwo segumbi lokufunxa ngendlela echaphazelekayo.I-angle yempompo ye-cavitation yokuchasana kwinqanaba elithile.
Iimvavanyo zibonise ukuba i-angle echanekileyo yohlaselo lohlaselo, utshintsho lwe-angle yokuhlaselwa kwi-cavitation yepompo yokuchasana kunempembelelo encinci, ukwandisa i-angle yokuhlaselwa kunokulibazisa iimeko zokuhamba kwempompo kwintsebenzo enkulu ye-anti-cavitation xa usebenza ukuwohloka ngokukhawuleza.Nangona kunjalo, ukuba i-angle efanelekileyo yosuku ngaphezu kwe-200, iya kubangela ukunciphisa ukusebenza kakuhle.Ukuba uthatha i-angle engalunganga yokuhlaselwa , ukuchasana kwempompo ye-cavitation kuyancipha kakhulu .
Ixesha lokuposa: Jul-13-2021