Two-Stage Pump

Abstract

The invention relates to a two-stage pump for pumping at least one medium, wherein the pump has a liquid ring stage (1), a side channel stage (2), and two medium accesses (3), wherein the liquid ring stage (1) has a medium chamber (12) and two medium openings (13, 14), wherein the two medium openings (13, 14) of the liquid ring stage (1) open onto the medium chamber (12) of the liquid ring stage (1), wherein the side channel stage (2) has a medium chamber (22) and two medium openings (23, 24), wherein the two medium openings (23, 24) of the side channel stage (2) open onto the medium chamber (22) of the side channel stage (2), and wherein one medium opening (23) of the two medium openings (23, 24) of the side channel stage (2) and one medium opening (13) of the two medium openings (13, 14) of the liquid ring stage (1) merge to form a common overflow opening (4).

1 - 8 . (canceled) 
     
     
         9 . A two-stage pump for pumping at least one medium, the two-stage pump comprising:
 a liquid ring stage;   a side channel stage; and   two medium accesses,   wherein the liquid ring stage has a medium chamber and two medium openings,   wherein the two medium openings of the liquid ring stage open onto the medium chamber of the liquid ring stage,   wherein the side channel stage has a medium chamber and two medium openings,   wherein the two medium openings of the side channel stage open onto the medium chamber of the side channel stage, and   wherein one medium opening of the two medium openings of the side channel stage and one medium opening of the two medium openings of the liquid ring stage merge to form a common overflow opening.   
     
     
         10 . The two-pump of  claim 9 , wherein the other medium opening of the two medium openings of the side channel stage and the other medium opening of the two medium openings of the liquid ring stage are connected to one respective medium access of the two medium accesses. 
     
     
         11 . The two-stage pump of  claim 9 , wherein the liquid ring stage further has a cover component, a bottom component, and an impeller, wherein the cover component of the liquid ring stage and the bottom component of the liquid ring stage enclose the medium chamber of the liquid ring stage, wherein the medium chamber of the liquid ring stage has a circular cylindrical shape about a longitudinal axis, wherein the impeller of the liquid ring stage has blades extending from an axis of rotation, wherein the blades of the impeller of the liquid ring stage are arranged in the medium chamber of the liquid ring stage, and wherein the impeller of the liquid ring stage is arranged relative to the medium chamber of the liquid ring stage such that the axis of rotation of the impeller is offset with respect to the longitudinal axis of the medium chamber. 
     
     
         12 . The two-stage pump of  claim 9 , wherein the side channel stage further has a cover component, a bottom component, and an impeller, wherein the cover component of the side channel stage and the bottom component of the side channel stage enclose the medium chamber of the side channel stage, wherein the bottom component of the side channel stage has a conveying channel having an interrupter, wherein the conveying channel is open to the medium chamber of the side channel stage, wherein the impeller of the side channel stage has blades extending from an axis of rotation, wherein the blades of the impeller of the side channel stage are arranged in the medium chamber of the side channel stage, wherein the medium chamber of the side channel stage has a circular cylindrical shape about a longitudinal axis, and wherein the impeller of the side channel stage is arranged in the medium chamber of the side channel stage so as to be rotatable about the longitudinal axis. 
     
     
         13 . The two-stage pump of  claim 12 , wherein the liquid ring stage further has a cover component, a bottom component, and an impeller, wherein the cover component of the liquid ring stage and the bottom component of the liquid ring stage enclose the medium chamber of the liquid ring stage, wherein the medium chamber of the liquid ring stage has a circular cylindrical shape about a longitudinal axis, wherein the impeller of the liquid ring stage has blades extending from an axis of rotation, wherein the blades of the impeller of the liquid ring stage are arranged in the medium chamber of the liquid ring stage, and wherein the impeller of the liquid ring stage is arranged relative to the medium chamber of the liquid ring stage such that the axis of rotation of the impeller is offset with respect to the longitudinal axis of the medium chamber. 
     
     
         14 . The two-stage pump of  claim 13 , wherein the impeller of the side channel stage and the impeller of the liquid ring stage are configured in one piece. 
     
     
         15 . The two-stage pump of  claim 13 , wherein the bottom component of the liquid ring stage and the cover component of the side channel stage have a common intermediate component, and wherein the common intermediate component includes the common overflow opening. 
     
     
         16 . The two-stage pump of  claim 9 , wherein the two-stage pump is configured to pump two different media. 
     
     
         17 . The two-stage pump of  claim 9 , further comprising:
 a motor having two directions of rotation,   wherein one of the two medium accesses is used as a medium inlet or medium outlet and the other of the two medium accesses is used as a medium outlet or medium inlet.