Centrifugal coolant pump

Abstract

A centrifugal coolant pump, comprising a water inlet coupling flange( 1 ), an impeller ( 2 ), a volute casing ( 3 ), a bearing ( 4 ), a bearing housing ( 5 ), a transmission shaft ( 6 ), and fasteners ( 7 ). The bearing ( 4 ) is interference installed in the bearing housing ( 5 ). The transmission shaft ( 6 ) and the bearing ( 4 ) inner race are interference fitted together. The impeller ( 2 ) is interference installed on the transmission shaft ( 6 ). The water inlet coupling flange ( 1 ) and the bearing housing ( 5 ) are separately disposed on the two sides of the volute casing ( 3 ) and fixedly connected via the fasteners ( 7 ). The water inlet coupling ( 1 ) is provided with a first water inlet (A 11 ), and the volute casing ( 3 ) is provided with a second water inlet (B 12 ). The impeller ( 2 ) mates with the volute casing ( 3 ) to form an independent high-temperature flow path ( 9 ) and a low-temperature flow path ( 8 ).

1 . A centrifugal cooling pump, including an intake water plate ( 1 ), an impeller ( 2 ), a spiral case ( 3 ), a bearing ( 4 ), a bearing block ( 5 ), a transmission shaft ( 6 ) and a fastener ( 7 ); the said bearing ( 4 ) is installed with an interference fit on the bearing block ( 5 ); the transmission shaft ( 6 ) is matched with an interference fit with the inner ring of the bearing ( 4 ); the impeller ( 2 ) is mounted with an interference fit on the transmission shaft ( 6 ); the said intake water plate ( 1 ) and the bearing block ( 5 ) are set respectively at the two sides of the spiral case ( 3 ) and fixed by using the fastener ( 7 ); the said intake water plate ( 1 ) is set with a first water inlet (A 11 ); the said spiral case ( 3 ) is set with a second water inlet (B 12 ); the said impeller ( 2 ) together with the spiral case ( 3 ) form independent high-temperature fluid flow channel ( 9 ) and low-temperature fluid flow channel ( 8 ). 
     
     
         2 . According to the centrifugal cooling pump described in  claim 1 , one side of the impeller ( 2 ) is set with a high-temperature blade ( 13 ) corresponding to the high-temperature flow channel ( 9 ), and the other side is set with a low-temperature blade ( 16 ) corresponding to the low-temperature channel ( 8 ). 
     
     
         3 . According to the centrifugal cooling pump described in  claim 2 , the high-temperature blade ( 13 ) and the low-temperature blade ( 16 ) both adopt the forward bending and sweepback form. 
     
     
         4 . According to the centrifugal cooling pump described in  claim 2  or  claim 3 , there are  6  pieces of the said high-temperature blade ( 13 ) and the low-temperature blade ( 16 ) respectively. 
     
     
         5 . According to the centrifugal cooling pump described in any of  claim 1 , the said first water inlet (A 11 ) and second water inlet (B 12 ) both adopt intake water along the axial direction of the transmission shaft. 
     
     
         6 . According to the centrifugal cooling pump described in any of  claim 1 , the said intake water plate ( 1 ) has a straight tapered axial suction chamber with the taper of 7-11°. 
     
     
         7 . According to the centrifugal cooling pump described in  claim 6 , the taper of the said suction chamber is 10°. 
     
     
         8 . According to the centrifugal cooling pump described in any of  claim 1 , the said spiral case ( 3 ) still includes a first water outlet ( 11 ) and second water outlet ( 12 ); the said high-temperature flow channel ( 9 ) corresponds to the first water outlet ( 11 ), and the said low-temperature channel ( 8 ) corresponds to the second water outlet ( 12 ). 
     
     
         9 . According to the centrifugal cooling pump described in  claim 8 , the said first water outlet ( 11 ) and second water outlet ( 12 ) both adopt water emission along the axial direction of the transmission shaft.