Side channel compressor

Abstract

The invention concerns a side channel compressor for compressing a gas, the side channel compressor comprising a housing ( 3 ), a side channel ( 30 ) located in the housing ( 3 ) for compressing a gas, a gas inlet opening which is formed in the housing ( 3 ) and is in flow connection with the side channel ( 30 ) for introducing a gas to be compressed, a gas outlet opening ( 32 ) formed in the housing ( 3 ) for discharging the gas to be compressed from the side channel ( 30 ), the gas outlet opening ( 32 ) being in flow connection with the gas inlet opening ( 31 ) by way of the side channel ( 30 ), and a impeller ( 2 ) mounted for rotary drive in the housing ( 3 ), the impeller ( 2 ) having at least two impeller blades ( 1 ) disposed in the side channel, wherein at least one impeller blade ( 1 ) has a flow recess in its free edge region ( 47 ).

1 . A side channel compressor for compressing a gas comprising
 a) a housing ( 3 )   b) a side channel ( 30 ) located in the housing ( 3 ) for compressing a gas,   c) a gas inlet opening ( 31 ) formed in the housing ( 3 ) which is in flow connection with the side channel ( 30 ) for introducing a gas to be compressed,   d) a gas outlet opening ( 32 ) formed in the housing ( 3 ) for discharging the gas to be compressed from the side channel ( 30 ), the gas outlet opening ( 32 ) being in flow connection with the gas inlet opening ( 31 ) by way of the side channel ( 30 ), and   e) an impeller ( 2 ;  2   a;    2   b  . . . ;  2   g ) which is mounted for rotary drive in the housing ( 3 ) and has at least two impeller blades ( 1 ;  1   a ;  1   b  . . . ;  1   f ) disposed in the side channel ( 30 ), wherein at least one impeller blade ( 1 ;  1   a ;  1   b  . . . ;  1   f ) has at least one flow recess ( 52 ,  52   c ) in its free edge region ( 45   d;    47 ;  47   a;    47   b;    47   c;    47   f ).   
   
   
       2 . A side channel compressor according to  claim 1 , wherein each impeller blade ( 1 ;  1   a ;  1   b  . . . ;  1   f ) has lateral edges ( 47 ;  47   a;    47   b;    47   c;    47   d;    47   f ), wherein the lateral edges ( 47 ;  47   a;    47   b;    47   c;    47   d;    47   f ) are provided with flow recesses ( 52 ,  52   c ) so as to reduce gas turbulence structures. 
   
   
       3 . A side channel compressor according to  claim 2 , wherein each lateral edge ( 47 ;  47   a;    47   b;    47   c;    47   f ) is provided with at least one flow recess ( 52 ,  52   c ). 
   
   
       4 . A side channel compressor according to  claim 1 , wherein each impeller blade ( 1 ;  1   a ;  1   b  . . . ;  1   f ) has a head edge ( 45 ;  45   d ), the head edges ( 45   d ) being provided with flow recesses ( 52 ;  52   c ) for reducing gas turbulence structures. 
   
   
       5 . A side channel compressor according to  claim 4 , wherein each head edge ( 45   d ) is provided with at least one flow recess ( 52 ;  52   c ). 
   
   
       6 . A side channel compressor according to  claim 1 , wherein the flow recesses ( 52 ;  52   c ) are flow grooves. 
   
   
       7 . A side channel compressor according to  claim 1 , wherein the flow recesses are flow chamfers. 
   
   
       8 . A side channel compressor according to  claim 1 , wherein at least two impeller blades ( 1 ;  1   a ;  1   b  . . . ;  1   f ) differ from each other so as to reduce periodic flow structures. 
   
   
       9 . A side channel compressor according to  claim 8 , wherein each impeller blade ( 1 ;  1   a ;  1   b  . . . ;  1   f ) has a head edge ( 45   d ), wherein the at least two impeller blades ( 1 ;  1   a ;  1   b  . . . ;  1   f ) differ in terms of their head edges ( 45 ;  45   d ). 
   
   
       10 . A side channel compressor according to  claim 9 , wherein the head edges ( 45 ;  45   d ) differ in terms of flow recesses ( 52 ;  52   c ). 
   
   
       11 . A side channel compressor according to  claim 8 , wherein the impeller blades ( 1 ;  1   a ;  1   b  . . . ;  1   f ) have lateral edges ( 47 ;  47   a;    47   b;    47   c;    47   d ;  47   f ), wherein the at least two impeller blades ( 1 ;  1   a ;  1   b  . . . ;  1   f ) differ in terms of their lateral edges ( 47 ;  47   a;    47   b;    47   c;    47   d;    47   f ). 
   
   
       12 . A side channel compressor according to  claim 11 , wherein the lateral edges ( 47 ;  47   a;    47   b;    47   c;    47   d;    47   f ) differ in terms of flow recesses ( 52 ;  52   c ). 
   
   
       13 . A side channel compressor according to  claim 8 , wherein the impeller blades differ in terms of their size. 
   
   
       14 . A side channel compressor according to  claim 8 , wherein the different impeller blades ( 1 ;  1   a ;  1   b  . . . ;  1   f ) are disposed in a random sequence. 
   
   
       15 . A side channel compressor according to  claim 1 , comprising at least one stationary projection for engaging with the at least one flow recess ( 52 ,  52   c ).