Screw spindle pump

Abstract

The invention relates to a screw spindle pump (1) with a housing (2) which has an inlet (22) and an outlet (21) for a medium, with two spindles (3, 4) which are designed as shafts with respectively at least one external screw thread (31, 41), wherein the spindles (3, 4) are mounted next to each other in the housing (2) and the screw threads (31, 41) engage in each other in order to convey the medium from the inlet (22) to the outlet (21). The invention provides that each spindle (3, 4) is mounted in an axial bearing (5.1, 5.2) and the axial bearings (5.1, 5.2) are arranged diagonally opposite each other.

1 . A screw spindle pump with a housing which has an inlet and an outlet for a medium, with two spindles which are designed as shafts with at least one external screw thread each, wherein the spindles are mounted next to each other in the housing and the screw threads engage in each other in order to convey the medium from the inlet to the outlet, wherein each spindle is mounted in an axial bearing and the axial bearings are arranged diagonally opposite each other. 
     
     
         2 . The screw spindle pump according to  claim 1 , wherein each spindle is mounted in precisely one axial bearing. 
     
     
         3 . The screw spindle pump according to  claim 1 , wherein at least one axial bearing is designed as a roller bearing. 
     
     
         4 . The screw spindle pump according to  claim 1 , wherein at least one spindle ( 3 ,  4 ) is mounted in at least one additional radial bearing ( 6 . 1 ,  6 . 2 ) in the housing ( 2 ). 
     
     
         5 . The screw spindle pump according to  claim 4 , wherein each spindle is mounted in the housing on both sides of the screw thread in two radial bearings. 
     
     
         6 . The screw spindle pump according to  claim 4 , characterised in that at least one radial bearing ( 6 . 1 ,  6 . 2 ) is designed as a sliding bearing. 
     
     
         7 . The screw spindle pump according to  claim 4 , wherein the at least one axial bearing and/or the at least one radial bearing is arranged in a flow of the medium. 
     
     
         8 . The screw spindle pump according to  claim 4 , wherein at least one lubrication pocket and/or one lubrication groove is arranged in at least one of the radial bearings. 
     
     
         9 . The screw spindle pump according to  claim 8 , wherein the lubrication pocket and/or lubrication groove has an inlet and an outlet which is fluidically connected to the medium conveyed. 
     
     
         10 . The screw spindle pump according to  claim 4 , wherein the axial bearing abuts against one of the radial bearings. 
     
     
         11 . The screw spindle pump according to  claim 4 , wherein the axial bearing is arranged on the side of the radial bearing facing away from the screw thread. 
     
     
         12 . The screw spindle pump according to  claim 1 , wherein the screw spindle pump has a direct drive for driving one of the spindles. 
     
     
         13 . The screw spindle pump according to  claim 1 , wherein the screw spindle pump is single-flow.