ZX series self-suction pump

This pump casing consists of a suck-in room,a liquid storing room,a scroll room,a liquid back hole,an air-liquid separating room etc.and holds an axially-liquid-back structure.After the pump is normally started,the impeller sucks in the all liquid inside of the suck-in room and the air inside of the pipeline and gets them completely mixed inside of it,then,under the action of the centrifugal force,the liquid,carrying the air,flows towards the outer edge of the scroll room and,on the outer edge of the impeller,a white foam band of a certain thickness and a quickly rotating liquid ring are formed.The air-liquid mixture gets into the air-liquid separating room through the expanding pipe and,as the flow-rate is abruptly lowered thereafter,the lighter air is separated from the mixture and rises through the vomit port of the pump casing and is exhausted therefrom.The liquid with the air off returns to the liquid storing room and gets in to the impeller again through the liquid back hole,where it is mixed again with the air sucked in from the suck-in pipe-line  and,under the action of the quickly rotating impeller,flows towards the outer edge of the impeller again……,along with the repeated process,the air in the suck-in pipeline is continually reduced till being sucked up,the self-suction process ends and the pump gets into the normal work.This unique exhaust capacity makes the pump able to transport the air-contained liquid without a foot valve mounted and of a good cabin cleaning function when used on an oil ship.There is a cooling room on the bottom of the bearing body with some pumps and,when the bearing body's temperature rise is over 70oC with the bearing heated,the cooling liquid can be injected in through any one of the cooling liquid unions in the cooling room for cycled cooling.The sealing mechanism inside of the pump used to prevent the liquid from leaking from the high pressure area to the low one is the front and rear seal rings,the front ring is mount-ed on the pump casing and the rear one on the bearing body.When the seal ring gets worn out to a certain extent after along time work of the pump and thus affecting both efficiency and self-suction property of it,it should be replaced.