Impeller for a centrifugal pump and centrifugal pump

Abstract

An impeller for a centrifugal pump has at least one vane which has a lower side concavely curved in at least one part region and which has at least one kink line in at least one part region. The kink line extends at least substantially along a main direction of extent of the at least one vane. The vane is open in a V shape along the kink line in at least one part region in the direction of a surface normal of the lower side.

1 . An impeller for a centrifugal pump, comprising
 at least one vane having a lower side concavely curved in at least one part region and having at least one kink line in the at least one part region, the kink line extending at least substantially along a main direction of an extent of the at least one vane, the vane being open in a V shape along the kink line in at least one part region in the direction of a surface normal of the lower side.   
     
     
         2 . An impeller in accordance with  claim 1 , wherein
 the at least one vane has at the lower side an opening angle which is spanned by the kink line and which is less than 180 degrees in the at least one part region.   
     
     
         3 . An impeller in accordance with  claim 2 , wherein
 the opening angle has in the at least one part region a bisectrix lying at least substantially in a plane oriented perpendicular to an axis of rotation.   
     
     
         4 . An impeller in accordance with  claim 3 , wherein
 the bisectrix and the kink line span the plane oriented perpendicular to the axis of rotation.   
     
     
         5 . An impeller in accordance with  claim 1 , wherein
 the lower side of the vane has at least two part surfaces arranged on oppositely disposed sides of the kink line and which include a respective acute angle at the kink line with a plane perpendicular to an axis of rotation.   
     
     
         6 . An impeller in accordance with  claim 5 , wherein
 the angles between the plane perpendicular to the axis of rotation and the part surfaces are each less than 80 degrees.   
     
     
         7 . An impeller in accordance with  claim 5 , wherein
 the part surfaces have an at least a substantially planar configuration in the axial direction.   
     
     
         8 . An impeller at least in accordance with  claim 5 , further comprising
 two impeller disks laterally adjacent to the at least one and with which the part surfaces of the lower side of the vane include an obtuse angle in at least one part region.   
     
     
         9 . An impeller in accordance with  claim 1 , wherein
 the at least one vane has a symmetrical cross-section in at least one longitudinal sectional plane.   
     
     
         10 . An impeller in accordance with  claim 1 , wherein
 the at least one vane has a substantially constant thickness in at least one sectional plane.   
     
     
         11 . An impeller in accordance with  claim 1 , wherein
 the opening angle is at least 60 degrees and at most 160 degrees.   
     
     
         12 . An impeller in accordance with  claim 1 , further comprising
 a center wall arranged in a region of the kink line.   
     
     
         13 . An impeller in accordance with  claim 1 , wherein
 the impeller is configured to operate in a one-pass design.   
     
     
         14 . An impeller in accordance with  claim 1 , wherein
 the impeller is configured to operate in a two-pass design.   
     
     
         15 . A centrifugal pump comprising
 an impeller in accordance with  claim 1 .