Impeller for accelerating blasting abrasive

Abstract

An impeller for feeding blasting abrasive to be accelerated into the centrifugal wheel of a blasting installation, the impeller being arrangeable in the central region of the centrifugal wheel within a distributing sleeve having a discharging opening, and the impeller having, on at least one lateral disk, guiding members for guiding the blasting abrasive toward the outside, the guiding members each having two lateral surfaces which form, with lateral surfaces of adjacent guiding members, channels through which the blasting abrasive is dischargeable toward the outside. One or each guiding member has a top side that connects the outer ends of the two lateral surfaces of the guiding member together, and that has at least one section that is arranged in or above an imaginary non-curved reference plane that connects the lateral surfaces of the guiding member together likewise at their outer ends.

What is claimed is: 
     
         1 . An impeller for feeding blasting abrasive to be accelerated into the centrifugal wheel of a blasting installation, said impeller being arrangeable in the central region of the centrifugal wheel within a distributing sleeve ( 12 ) having a discharging opening ( 22 ), and said impeller comprising:
 at least one lateral disk ( 24 );   guiding members ( 20   a,    20   b ) on the at least one lateral disk ( 24 ), the guiding members ( 20   a,    20   b ) being for guiding the blasting abrasive toward the outside,   wherein the guiding members ( 20   a,    20   b ) each have two lateral surfaces ( 26   a ,  26   b ) which form, with lateral surfaces ( 26   a,    26   b ) of adjacent guiding members ( 20   a,    20   b ), channels ( 18 ) through which the blasting abrasive is dischargeable toward the outside,   wherein one or each of the guiding member ( 20   a,    20   b ) has in each case a top side ( 34   a,    34   b ) which connects outer ends ( 32   a ,  32   b ) of the lateral surfaces ( 26   a,    26   b ) of the guiding member ( 20   a ,  20   b ) together, and which has at least one section ( 38   a,    38   b,    40 ,  42   a - c ) which is arranged in or above an imaginary non-curved reference plane ( 36 ) that connects the lateral surfaces ( 26   a,    26   b ) of the guiding member ( 20   a,    20   b ) together likewise at the outer ends ( 32   a,    32   b ).   
     
     
         2 . The impeller as claimed in  claim 1 , wherein the guiding member ( 20   a,    20   b ) is formed symmetrically to a longitudinal center plane ( 21 ) of the guiding member ( 20   a,    20   b ). 
     
     
         3 . The impeller as claimed in  claim 2 , wherein a top side ( 34   a,    34   b ) of the guiding member ( 20   a,    20   b ) has, on both sides of the longitudinal center plane ( 21 ), in each case the at least one section ( 38   a,    38   b,    40 ,  42   a - c ), which is non-curved, arranged above the imaginary non-curved reference plane ( 36 ). 
     
     
         4 . The impeller as claimed in  claim 3 , wherein the top side ( 34   a ) of the guiding member ( 28 ) has, on both sides of the longitudinal center plane ( 21 ), in each case the at least one section ( 38   a ,  38   b ) that adjoins the respective lateral surface ( 26   a,    26   b ) and extends in an inclined manner with respect to the imaginary non-curved reference plane ( 36 ), wherein the inclination is configured such that the pitch, with respect to the imaginary non-curved reference plane ( 36 ), of the at least one section ( 38   a,    38   b ) increases in each case as viewed in the direction of the longitudinal center plane ( 21 ). 
     
     
         5 . The impeller as claimed in  claim 4 , wherein two of the at least one section ( 38   a,    38   b ) of the top side ( 34   a ) that extend on both sides of the longitudinal center plane ( 21 ) are connected together directly or by at least one connecting section ( 40 ), extending at least regionally in a curved manner, of the top side ( 34   a ). 
     
     
         6 . The impeller as claimed in  claim 4 , wherein the two of the at least one section ( 38   a,    38   b ) are non-curved. 
     
     
         7 . The impeller as claimed in  claim 6 , wherein on both sides of the longitudinal center plane ( 21 ) there is arranged in each case the at least one section ( 38   a,    38   b ) that adjoins the respective lateral surface ( 26   a,    26   b ) and is arranged in the imaginary non-curved reference plane ( 36 ). 
     
     
         8 . The impeller as claimed in  claim 7 , wherein the at least one section ( 38   a,    38   b ) arranged in the imaginary non-curved reference plane ( 36 ) on both sides of the longitudinal center plane ( 21 ) are connected together by the at least one connecting section ( 40 ) 
     
     
         9 . The impeller as claimed in  claim 8 , wherein two of the at least one section ( 38   a,    38   b ) are connected together by two connecting sections ( 42   a,    42   b ) that extend on both sides of the longitudinal center plane, adjoin the respective at least one section ( 38   a,    38   b ) and extend perpendicularly or approximately perpendicularly to the at least one section ( 38   a,    38   b ), and a connecting section ( 42   c ) that connects the two connecting sections ( 42   a,    42   b ) together and extends in a manner parallel or approximately parallel to the at least one section ( 38   a,    38   b ). 
     
     
         10 . The impeller as claimed in one  claim 1 , wherein the channel-delimiting lateral surfaces ( 26   a,    26   b ) of the adjacent guiding members ( 20   a,    20   b ) extend in a manner parallel or approximately parallel to one another and spaced apart from one another. 
     
     
         11 . The impeller as claimed in  claim 1 , wherein all of the sections ( 38   a,    38   b,    40 ,  42   a - c ) of the top side ( 34   a,    34   b ) are arranged in and/or above the imaginary non-curved reference plane ( 36 ) connecting the lateral surfaces ( 26   a,    26   b ). 
     
     
         12 . A blasting installation having comprising:
 a centrifugal wheel;   a distributing sleeve ( 12 ) which is arranged in a central region of the centrifugal wheel, the distributing sleeve ( 12 ) having a discharging opening ( 22 ); and   an impeller ( 10 ), arranged in the interior of the distributing sleeve ( 12 ), the impeller comprising:
 at least one lateral disk ( 24 ); 
 guiding members ( 20   a,    20   b ) on the at least one lateral disk ( 24 ), the guiding members ( 20   a,    20   b ) being for guiding the blasting abrasive toward the outside, 
 wherein the guiding members ( 20   a,    20   b ) each have two lateral surfaces ( 26   a,    26   b ) which form, with lateral surfaces ( 26   a,    26   b ) of adjacent guiding members ( 20   a,    20   b ), channels ( 18 ) through which the blasting abrasive is dischargeable toward the outside, 
 wherein one or each of the guiding member ( 20   a,    20   b ) has in each case a top side ( 34   a,    34   b ) which connects outer ends ( 32   a,    32   b ) of the lateral surfaces ( 26   a,    26   b ) of the guiding member ( 20   a,    20   b ) together, and which has at least one section ( 38   a,    38   b,    40 ,  42   a - c ) which is arranged in or above an imaginary non-curved reference plane ( 36 ) that connects the lateral surfaces ( 26   a,    26   b ) of the guiding member ( 20   a,    20   b ) together likewise at the outer ends ( 32   a,    32   b ). 
   
     
     
         13 . The impeller as claimed in  claim 2 , wherein the top side ( 34   a ) of the guiding member ( 28 ) has, on both sides of the longitudinal center plane ( 21 ), in each case the at least one section ( 38   a,    38   b ) that adjoins the respective lateral surface ( 26   a,    26   b ) and extends in an inclined manner with respect to the imaginary non-curved reference plane ( 36 ), wherein the inclination is configured such that the pitch, with respect to the imaginary non-curved reference plane ( 36 ), of the at least one section ( 38   a,    38   b ) increases in each case as viewed in the direction of the longitudinal center plane ( 21 ). 
     
     
         14 . The impeller as claimed in  claim 13 , wherein two of the at least one section ( 38   a,    38   b ) of the top side ( 34   a ) that extend on both sides of the longitudinal center plane ( 21 ) are connected together directly or by at least one connecting section ( 40 ), extending at least regionally in a curved manner, of the top side ( 34   a ). 
     
     
         15 . The impeller as claimed in  claim 13 , wherein the two of the at least one section ( 38   a,    38   b ) are non-curved. 
     
     
         16 . The impeller as claimed in  claim 14 , wherein the two of the at least one section ( 38   a,    38   b ) are non-curved. 
     
     
         17 . The impeller as claimed in  claim 4 , wherein the channel-delimiting lateral surfaces ( 26   a,    26   b ) of the adjacent guiding members ( 20   a,    20   b ) extend in a manner parallel or approximately parallel to one another and spaced apart from one another. 
     
     
         18 . The impeller as claimed in  claim 13 , wherein the channel-delimiting lateral surfaces ( 26   a,    26   b ) of the adjacent guiding members ( 20   a,    20   b ) extend in a manner parallel or approximately parallel to one another and spaced apart from one another. 
     
     
         19 . The impeller as claimed in  claim 4 , wherein all of the sections ( 38   a,    38   b ,  40 ,  42   a - c ) of the top side ( 34   a,    34   b ) are arranged in and/or above the imaginary non-curved reference plane ( 36 ) connecting the lateral surfaces ( 26   a,    26   b ). 
     
     
         20 . The impeller as claimed in  claim 13 , wherein all of the sections ( 38   a,    38   b ,  40 ,  42   a - c ) of the top side ( 34   a,    34   b ) are arranged in and/or above the imaginary non-curved reference plane ( 36 ) connecting the lateral surfaces ( 26   a,    26   b ).