High power quintuplex plunger pump

Abstract

The present invention discloses a high power five cylinder plunger pump, including a power end assembly, a hydraulic end assembly and a reduction gearbox assembly, wherein the power end assembly includes a crankcase, a crosshead case and a spacer frame which are connected in sequence, the hydraulic end assembly is fixed on the spacer frame, the reduction gearbox assembly is fixed on the crankcase, the cylinder spacing of the five cylinder plunger pump is 13-14 inches, ensuring the high power output of the five cylinder plunger pump. The high power five cylinder plunger pump can effectively solve the problems of narrow area in shale gas fracturing wellsite and the need for multiple fracturing equipment, thus reducing the use of equipment and facilitating the arrangement of the wellsite.

1 . A quintuplex plunger pump, comprising a power end assembly, a hydraulic end assembly and a reduction gearbox assembly, the power end assembly comprises a crankcase, a crosshead case and a spacer frame which are connected in sequence, the hydraulic end assembly is fixed on the spacer frame, the reduction gearbox assembly is fixed on the crankcase, and the quintuplex plunger pump comprises five plungers and the distance between axial center lines of every two adjacent plungers is 13-14 inches, wherein the quintuplex plunger pump has a power of at least 7000 hp, and there are two slide rails fixed on the support plate within the power end housing, the two slide rails form a semi-circular space, in which a crosshead is mounted for reciprocating linear motion. 
     
     
         2 . The quintuplex plunger pump according to  claim 1 , wherein the crankcase and the crosshead case are integrally welded to constitute a power end housing which is connected to the spacer frame, the power end housing comprises six vertical plates, six bearing seats, a front end plate, a back cover plate, a base plate, support plates and an upper cover plate, wherein each of the vertical plates is connected to one of the bearing seats correspondingly, and the six vertical plates are arranged in parallel to constitute a power end chamber, the base plate is mounted at the bottom of the power end chamber, the upper cover plate is mounted on the top of the power end chamber, the front end plate is mounted at the front end of the power end chamber, the back cover plate is mounted at the back end of the power end chamber, and the support plates are disposed between every two adjacent vertical plates arranged in parallel. 
     
     
         3 . The quintuplex plunger pump according to  claim 1 , wherein a crankshaft support is disposed at the bottom of the crankcase, and the crankshaft support is used to support the crankcase. 
     
     
         4 . The quintuplex plunger pump according to  claim 1 , wherein a crosshead support is disposed at the bottom of the crosshead case, and the crosshead support is used to support the crosshead case 
     
     
         5 . The quintuplex plunger pump according to  claim 1 , wherein a hydraulic support is disposed at the bottom of the spacer frame, and the hydraulic support is used to support the hydraulic end assembly. 
     
     
         6 . The quintuplex plunger pump according to  claim 1 , wherein a crankshaft is disposed within the crankcase, the crankshaft is provided with a spline to which the reduction gearbox assembly is connected. 
     
     
         7 . The quintuplex plunger pump according to  claim 1 , wherein a crosshead assembly is disposed within the crosshead case, a connecting rod assembly is disposed between the crankcase and the crosshead case, and a crankshaft is disposed within the crankcase, one end of the connecting rod assembly is connected to the crankshaft through a connecting rod bearing bush, the other end of the connecting rod assembly is connected to the crosshead assembly through a crosshead bearing bush, and the connecting rod bearing bush and the crosshead bearing bush are both alloy coated steel backing bearing bushes. 
     
     
         8 . The quintuplex plunger pump according to  claim 1 , wherein the plungers in the quintuplex plunger pump reciprocate with a stroke of 11 inches.