Power End Housing for Plunger Pump and Plunger Pump Including Power End Housing

Abstract

The present disclosure provides a power end housing for a plunger pump and a plunger pump including the power end housing. The power end housing includes: an integrated crankcase (100), where the crankcase (100) includes a plurality of bearing seats (101) and a plurality of support vertical plates (102), the support vertical plates (102) are configured to support the bearing seats (101), the support vertical plates (102) are spaced apart in an axial direction of the bearing seats (101), and the crankcase (100) includes a first reinforcing rib (103) between every two support vertical plates (102), wherein an angle between a direction of a maximum resultant force on the bearing seats (101) and an axial direction of a plunger of the plunger pump is βmax, an angle between the first reinforcing rib (103) and the axial direction of the plunger is a first angle, and the first angle is greater than or equal to 0.8 βmax and less than or equal to 1.2 βmax. According to the present disclosure, a service life of the plunger pump is increased.

1 . A power end housing for a plunger pump, comprising an integrated crankcase ( 100 ), wherein:
 the integrated crankcase ( 100 ) comprises a plurality of bearing seats ( 101 ) and a plurality of supporting structural members ( 102 );   the plurality of supporting structural members ( 102 ) are configured to support the plurality bearing seats ( 101 );   the plurality of supporting structural members ( 102 ) are spaced apart in an axial direction of the plurality of bearing seats ( 101 );   the integrated crankcase ( 100 ) comprises first reinforcing ribs ( 103 ) between every two adjacent supporting structural members ( 102 ); and   a first angle is formed between the first reinforcing ribs ( 103 ) and an axial direction of plungers of the plunger pump, the first angle beings greater than or equal to 0.8 βmax and less than or equal to 1.2 βmax, βmax being an angle formed between a direction of a maximum resultant force on the plurality of bearing seats ( 101 ) and the axial direction of the plungers.   
     
     
         2 . The power end housing according to  claim 1 , wherein the first reinforcing ribs ( 103 ) are arranged at least on a front end surface ( 106 ) and/or a rear end surface ( 107 ) of the integrated crankcase ( 100 ), the front end surface ( 106 ) being a surface of a side of the integrated crankcase ( 100 ) that is connected to a crosshead case ( 200 ), and the rear end surface ( 107 ) being a surface at an opposite side of the front end surface ( 106 ). 
     
     
         3 . The power end housing according to  claim 2 , wherein respective groups of first reinforcing ribs ( 103 ) are separately arranged on the front end surface ( 106 ) and the rear end surface ( 107 ), and the first reinforcing ribs ( 103 ) in each group are symmetrical to each other relative to the axial direction of the plungers of the plunger pump. 
     
     
         4 . The power end housing according to  claim 3 , wherein the group of the first reinforcing ribs ( 103 ) arranged on the front end surface ( 106 ) and the group of the first reinforcing ribs ( 103 ) arranged on the rear end surface ( 107 ) are symmetrical to each other relative to vertical centerlines of the plurality of bearing seats ( 101 ). 
     
     
         5 . The power end housing according to  claim 3 , wherein each group of the first reinforcing ribs ( 103 ) comprise two first reinforcing ribs ( 103 ) for each pair of adjacent supporting structural members, and an angle between extending directions of the two first reinforcing ribs ( 103 ) is greater than or equal to 1.8 βmax and less than or equal to 2.2 βmax. 
     
     
         6 . The power end housing according to  claim 1 , wherein the integrated crankcase ( 100 ) further comprises a plurality of second reinforcing ribs ( 103 ′) between every two supporting structural members ( 102 ), and radial extending directions of the plurality of second reinforcing ribs ( 103 ′) pass through a center axis of the plurality of bearing seats ( 101 ). 
     
     
         7 . The power end housing according to  claim 6 , wherein the plurality of second reinforcing ribs ( 103 ′) are symmetrically arranged along seat holes of the plurality of bearing seats ( 101 ). 
     
     
         8 . The power end housing according to  claim 6 , wherein:
 the plurality of second reinforcing ribs ( 103 ′) are arranged on an upper side and a lower side of the plurality of bearing seats ( 101 );   three upper side reinforcing ribs ( 103 ′) are arranged on the upper side and two lower side reinforcing ribs ( 103 ′) are arranged on the lower side for each of the plurality of bearing seats; and   the two lower side reinforcing ribs ( 103 ′) for each of the plurality of bearing seats are separately located on two sides of a bottom portion oil return port without interfering with the bottom portion oil return port.   
     
     
         9 . The power end housing according to  claims 6 , wherein:
 a transition bevel ( 115 ) is arranged between each of the first reinforcing ribs ( 103 ) and/or each of the plurality of second reinforcing ribs ( 103 ′) and its corresponding supporting structural member ( 102 ); and   a transition fillet ( 116 ) is disposed between the bevel ( 115 ) and the corresponding supporting structural member ( 102 ).   
     
     
         10 . A power end housing for a plunger pump, comprising an integrated crankcase ( 100 ), wherein:
 the integrated crankcase ( 100 ) comprises a plurality of bearing seats ( 101 ) and a plurality of supporting structural members ( 102 );   the plurality of supporting structural members ( 102 ) are configured to support the plurality of bearing seats ( 101 );   the plurality of supporting structural members ( 102 ) are spaced apart in an axial direction of the bearing seats ( 101 ); and   a width of each of the plurality of bearing seats ( 101 ) is defined by a width of a corresponding bearing imposed on the each of the plurality of bearing seats ( 101 ).   
     
     
         11 . The power end housing according to  claim 10 , wherein:
 the plurality of bearing seats ( 101 ) comprise two end portion bearing seats ( 101 ) located at two ends of the integrated crankcase ( 100 ) and one or more middle-section bearing seats ( 101 );   the one or more middle-section bearing seats ( 101 ) are located between the two end portion bearing seats ( 101 ); and   the width of each of the one or more middle-section bearing seats ( 101 ) is greater than the width of each of the two end portion bearing seats ( 101 ).   
     
     
         12 . The power end housing according to  claim 11 , wherein the width of one of the two end portion bearing seats ( 101 ) located on a reduction case connection side of the integrated crankcase ( 100 ) is greater than the width of an other of the two end portion bearing seats ( 101 ). 
     
     
         13 . The power end housing according to  claim 11 , wherein:
 spacings between pairs of adjacent supporting structural members of the plurality of supporting structural members ( 102 ) are different; and   relative to a center of a length direction (X) of the integrated crankcase ( 100 ), the spacings between the pairs of adjacent supporting structural members of the plurality of supporting structural members ( 102 ) are set to be symmetrical to each other, the length direction (X) being parallel to the axial direction of the bearing seat ( 101 ).   
     
     
         14 . The power end housing according to  claim 1 , wherein each of the plurality of supporting structural member ( 102 ) comprises weight-reducing grooves ( 109 ). 
     
     
         15 . The power end housing according to  claim 1 , wherein:
 hoisting point bosses ( 110 ) are arranged on a top portion of the plurality of supporting structural members ( 102 ); and   a transition fillet is arranged at a joint between each of the hoisting point bosses ( 110 ) and a case body of the integrated crankcase ( 100 ).   
     
     
         16 . The power end housing according to  claim 1 , wherein a bottom portion of the integrated crankcase ( 100 ) comprises legs ( 119 ), and the legs ( 119 ) are configured to support the integrated crankcase ( 100 ). 
     
     
         17 . The power end housing according to  claim 1 , wherein:
 a surface of a side of the integrated crankcase ( 100 ) close to a crosshead case ( 200 ) comprises a plurality of first threaded holes ( 141 ); and   the plurality of first threaded holes ( 141 ) are configured to connect the integrated crankcase ( 100 ) and the crosshead case ( 200 ) through first bolts ( 131 ).   
     
     
         18 . The power end housing according to  claim 1 , wherein the integrated crankcase ( 100 ) is integrally cast. 
     
     
         19 . A plunger pump, wherein the plunger pump comprises the power end housing according to  claim 1 . 
     
     
         20 . The plunger pump according to  claim 19 , further comprising a hydraulic end housing, wherein:
 the power end housing further comprises a crosshead case ( 200 );   the hydraulic end housing, the crosshead case ( 200 ), and the integrated crankcase ( 100 ) are sequentially connected;   first threaded holes ( 141 ) penetrate from the hydraulic end housing to the integrated crankcase ( 100 ); and   first bolts ( 131 ) connect the hydraulic end housing, the crosshead case ( 200 ), and the integrated crankcase ( 100 ) together through the first threaded holes ( 141 ).