Pumping apparatus as well as a diffusor for a pumping apparatus

Abstract

Disclosed are a diffuser and a pump including a feed column extending around a diffusor axis of the pump and having a rotor housing which is arranged between an intake and a diffusor arranged in a diffusor section. During operation, fluid is sucked by the pump rotor via the intake, and is discharged from the feed column via the diffusor section, the feed tube and the outlet stub. The diffusor includes an inlet section arranged between an outlet section and the pump rotor, wherein a first part section adjacent to the inlet section is formed at the outlet section, the first part section is inclined with respect to the diffusor axis at a first angle (α). A second part section adjoining the first part section is inclined with respect to the diffusor axis at a second angle (β) different from the first outlet angle (α).

1 . A pumping apparatus including a feed column ( 2 ) extending around a diffusor axis (A) of the pumping apparatus and having a rotor housing ( 3 ) which is arranged between an intake and a diffusor ( 5 ) arranged in a diffusor section ( 4 ), as well as having a feed tube ( 6 ) with an outlet stub and adjoining the diffusor section ( 4 ), wherein a pump rotor ( 7 ) is arranged in the rotor housing ( 3 ) such that, in an operating state, a fluid (F) to be conveyed can be sucked by the pump rotor ( 7 ) via the intake, and can be discharged again from the feed column ( 2 ) of the pumping apparatus via the diffusor section ( 4 ), the feed tube ( 6 ) and via the outlet stub, wherein the diffusor ( 5 ) includes an inlet section ( 51 ) arranged between an outlet section ( 52 ) of the diffusor ( 5 ) and the pump rotor ( 7 ) and a first part section ( 521 ) adjacent to the inlet section ( 51 ) is formed at the outlet section ( 52 ), with the first part section being inclined with respect to the diffusor axis (A) at a first predefinable outlet angle (α) in a direction towards the feed tube ( 6 ), characterized in that a second part section ( 522 ) adjoining the first part section ( 521 ) is formed at the outlet section ( 52 ), with the second part section being inclined with respect to the diffusor axis (A) at a second outlet angle (β) different from the first outlet angle (α). 
     
     
         2 . The pumping apparatus in accordance with  claim 1 , wherein at least one third part section is formed at the outlet section ( 52 ), with the third part section being inclined with respect to the diffusor axis (A) at a third outlet angle, wherein the third outlet angle is preferably different from the first outlet angle (α) and/or different from the second outlet angle (β). 
     
     
         3 . The pumping apparatus in accordance with  claim 1 , wherein the second outlet angle (β) measured with respect to the diffusor axis (A) is larger than the first outlet angle (α) measured with respect of the diffusor axis (A). 
     
     
         4 . The pumping apparatus in accordance with  claim 1 , wherein the first outlet angle (α) amounts to at most 15 degrees, preferably lies in a range of from 6 degrees to 12 degrees and in particular lies at 10 degrees and/or wherein the second outlet angle (β) amounts to at most 30 degrees, preferably lies in a range of from 12 degrees to 24 degrees and in particular lies at 18 degrees. 
     
     
         5 . The pumping apparatus in accordance with  claim 1 , wherein a difference angle between the first outlet angle (α) and the second outlet angle (β) lies in the range from 6 degrees to 12 degrees, preferably lies at 8 degrees. 
     
     
         6 . The pumping apparatus in accordance with  claim 2 , wherein the third part section is formed at the outlet section ( 52 ) between the first part section ( 521 ) and the second part section ( 522 ); and the third outlet angle is preferably larger than the first outlet angle (α) and smaller than the second outlet angle (β). 
     
     
         7 . The pumping apparatus in accordance with  claim 1 , wherein the first outlet angle (α) is constant in the region of the overall first part section ( 521 ) and/or the second outlet angle (β) is constant in the region of the overall second part section ( 522 ) and/or the third outlet angle is constant in the region of the overall third part section. 
     
     
         8 . The pumping apparatus in accordance with  claim 1 , wherein the pumping apparatus includes a multi-stage pumping apparatus having a plurality of pump rotors ( 7 ) arranged in series with respect to the diffusor axis (A) and preferably includes two pump rotors ( 7 ) arranged in series. 
     
     
         9 . The pumping apparatus in accordance with  claim 1 , wherein the pumping apparatus is a vertical pump, in particular a vertical pump for the conveyance of water, waste water or for the conveyance of a different liquid fluid. 
     
     
         10 . A diffusor for a pumping apparatus ( 1 ), wherein the diffusor includes an outlet section ( 52 ) and an inlet section ( 51 ), and a first part section ( 521 ) adjacent to the inlet section ( 51 ) is formed at the outlet section ( 52 ), with the first part section being inclined with respect to the diffusor axis (A) at a first predefinable outlet angle (α), characterized in that a second part section ( 522 ) adjoining the first part section ( 521 ) is formed at the outlet section ( 52 ), with the second part section being inclined with respect to the diffusor axis (A) at a second outlet angle (β) different from the first outlet angle (α), 
     
     
         11 . The diffusor in accordance with  claim 10 , wherein at least one third part section is formed at the outlet section ( 52 ), with the third part section being inclined with respect to the diffusor axis (A) at a third outlet angle, wherein the third outlet angle is preferably different from the first outlet angle (α) and/or different from the second outlet angle (β). 
     
     
         12 . The diffusor in accordance with  claim 10 , wherein the second outlet angle (β) measured with respect to the diffusor axis (A) is larger than the first outlet angle (α) measured with respect to the diffusor axis (A). 
     
     
         13 . The diffusor in accordance with  claim 10 , wherein the first outlet angle (α) amounts to at most 15 degrees, preferably lies in the range of 6 degrees to 12 degrees, and in particular lies at 10 degrees; and/or wherein the second outlet angle (β) amounts to at most 30 degrees, preferably lies in a range of between 12 degrees and 24 degrees, and in particular lies at 18°; and/or wherein a difference angle between the first outlet angle (α) and the second outlet angle (β) lies in the range of from 6 degrees to 12 degrees and preferably lies at 8 degrees. 
     
     
         14 . The diffusor in accordance with  claim 8 , wherein the third part section is formed at the outlet section ( 52 ) between the first part section ( 521 ) and the second part section ( 522 ), and the third outlet angle is preferably larger than the first outlet angle (α) and smaller than the second outlet angle (β). 
     
     
         15 . The diffusor in accordance with  claim 8 , wherein the first outlet angle (α) is constant in the region of the overall first part section ( 521 ) and/or the second outlet angle (β) is constant in the region of the overall second part section ( 522 ) and/or the third outlet angle is constant in the region of the overall third part section.