Double-Flow Pump

Abstract

A double-flow pump with a housing which has at least one inlet, at least one outlet and a conveyor housing with two single-part or multi-part conveyor units which convey a conveying medium from the inlet in opposite directions to the outlet, the conveyor units have shaft ends which are mounted in bearings, the bearings are each arranged in a bearing housing, wherein the shaft ends are detachably connected to the conveying units.

What is claimed: 
     
         1 . A double-flow pump comprising:
 a housing comprising:
 one or more inlets; 
 one or more outlets; and, 
 a conveyor housing comprising two or more conveyor units which convey a medium from the one or more inlets to the one or more outlets, wherein at least one of the conveyor units have one or more shaft ends, wherein the one or more shaft ends are detachably connected to the corresponding conveyor unit of the two or more conveyor units, and wherein the one or more shaft ends are mounted in bearings, wherein the bearings are positioned in one or more bearing housings. 
   
     
     
         2 . The double-flow pump of  claim 1 , wherein the one or more shaft ends are detachably connected to the corresponding conveyor unit via a tapered conical connection or positive locking connection. 
     
     
         3 . The double-flow pump of  claim 2 , wherein the one or more shaft ends are screwed to the corresponding conveyor unit. 
     
     
         4 . The double-flow pump of  claim 1 , wherein the conveyor housing further comprises of one or more sealed shaft passage openings. 
     
     
         5 . The double-flow pump of  claim 4 , wherein one or more seals are positioned inside the one or more sealed shaft passage openings. 
     
     
         6 . The double-flow pump of  claim 1 , wherein the conveyor housing is positioned at a distance from the one or more bearing housings and is connected to the one or more bearing housings via the one or more shaft ends. 
     
     
         7 . The double-flow pump of  claim 1 , wherein the one or more bearing housings comprise one or more through-openings for the one or more shaft ends. 
     
     
         8 . The double-flow pump of  claim 7 , wherein one or more through-openings are sealed. 
     
     
         9 . The double-flow pump of  claim 1 , wherein one or more bearing housings comprises a lubricant reservoir. 
     
     
         10 . The double-flow pump of  claim 1 , wherein the two or more conveyor units further comprise two or more spindles that are rotatably mounted in the conveyor housing, wherein at least one of the spindles of the two or more spindles have two screw threads on its outer circumference that have oppositely oriented pitches and are in engagement with opposing screw threads of a different spindle of the two or more spindles and convey the medium from the one or more inlets to the one or more outlets. 
     
     
         11 . The double-flow pump of  claim 1 , wherein the double-flow pump is a centrifugal pump, wherein at least two conveyor units of the two or more conveyor units are oriented in opposite directions of each other, and wherein at least one of the conveyor units in the two or more conveyor units comprise an impeller. 
     
     
         12 . The double-flow pump of  claim 1 , wherein the conveyor housing is sealed from an outside environment. 
     
     
         13 . The double-flow pump of  claim 1 , wherein the one or more bearing housings are sealed from an outside environment. 
     
     
         14 . The double-flow pump of  claim 1 , wherein the two or more conveyor units are mounted between a first set of one or more bearings and a second set of one or more bearings, wherein the first set and second set of one or more bearings are in bearing housings. 
     
     
         15 . The double-flow pump of  claim 2 , wherein tapered bores are formed in the two or more conveyor units for receiving truncated cones of the one or more shaft ends. 
     
     
         16 . A double-flow screw pump comprising:
 a housing comprising:
 two inlets; 
 an outlet; and 
 a conveyor housing comprising two conveyor units which convey a medium from the two inlets in opposite directions to the outlet, wherein the conveyor units comprise:
 one or more shaft ends, wherein the one or more shaft ends are detachably connected to the corresponding conveyor unit and wherein the one or more shaft ends are mounted in bearings, wherein the bearings are positioned in a bearing housing; and 
 a spindle that is rotatably mounted in the conveyor housing, wherein the spindle has two screw threads on its outer circumference that have oppositely oriented pitches and are in engagement with opposing screw threads of the other spindle and convey the medium from the two inlets to the outlet. 
 
   
     
     
         17 . The double-flow screw pump of  claim 16 , wherein the one or more shaft ends are detachably connected to the corresponding conveyor units via a tapered conical connection or positive locking connection. 
     
     
         18 . The double-flow screw pump of  claim 17 , wherein tapered bores are formed in the conveyor units for receiving truncated cones of the one or more shaft ends. 
     
     
         19 . A double-flow centrifugal pump comprising:
 a housing comprising:
 two inlets; 
 an outlet; and, 
 a conveyor housing comprising two conveyor units which convey a medium from the two inlets in opposite direction to the outlet, wherein the conveyor units comprise:
 one or more shaft ends, wherein the one or more shaft ends are detachably connected to the corresponding conveyor unit and wherein the one or more shaft ends are mounted in bearings, wherein the bearings are in a bearing housing; and 
 an impeller. 
 
   
     
     
         20 . The double-flow centrifugal pump of  claim 19 , wherein the conveyor housing is scaled from an outside environment.