Volumetric screw compressor

Abstract

The present invention concerns a compression device ( 1 ) suited to compress a gas, of the type comprising: a main body ( 30; 130, 230; 330 ) suited to define a compression chamber ( 2 ) provided with an inlet ( 32 ) for the gas; a liquid for compressing the gas, suited to be injected in the compression chamber ( 2 ) to create a mixture comprising the liquid and the gas; compression means ( 21, 22 ) arranged in the compression chamber ( 2 ) and suited to compress the mixture towards an outlet ( 50 ) of the compression chamber ( 2 ); separation means ( 7 ), arranged downstream of the outlet ( 50 ), suited to receive the mixture and to separate the liquid and the gas that are included in the mixture; connection means ( 51 ) suited to connect the outlet ( 50 ) to the separation means ( 7 ). Said connection means ( 51 ) comprise at least one connection channel made at least partially in said main body ( 30; 130, 230; 330 ).

1 ) Gas compression device ( 1 ), comprising:
 a main body ( 30 ;  130 ,  230 ;  330 ) suited to define a compression chamber ( 2 ) provided with an inlet ( 32 ) for gas, said main body being a single block;   a compression liquid for the gas, suited to be injected in the compression chamber ( 2 ) in order to obtain a mixture comprising said compression liquid and the gas;   compression means ( 21 ,  22 ) arranged in the compression chamber ( 2 ) and suited to compress the mixture towards an outlet ( 50 ) of the compression chamber ( 2 );   separation means ( 7 ) arranged downstream of the outlet ( 50 ) and suited to receive the mixture and separate said compression liquid from the gas included in the mixture;   a connection channel ( 51 ) suited to directly connect the outlet ( 50 ) to said separation means ( 7 );   wherein said connection channel ( 51 ) is completely made in said main body ( 30 ;  130 ,  230 ;  330 ).   
     
     
         2 ) Device according to  claim 1 , wherein:
 said separation means ( 7 ) are at least partially housed in said main body ( 30 ;  130 ,  230 ;  330 ).   
     
     
         3 ) Device ( 1 ) according to  claim 1  wherein:
 said separation means ( 7 ) comprise an element ( 52 ) suited to convey said mixture against a surface of said main body ( 30 ;  130 ,  230 ;  330 ). 
 
     
     
         4 ) Device ( 1 ) according to  claim 1  further comprising:
 a tank ( 40 ) arranged downstream of said separation means ( 7 ) in order to receive at least a separated compression liquid of the mixture. 
 
     
     
         5 ) Device ( 1 ) according to  claim 4 , wherein:
 said tank ( 40 ) can be removably associated with said main body ( 30 ;  130 ,  230 ;  330 ).   
     
     
         6 ) Device ( 1 ) according to  claim 4  further comprising:
 a circuit recirculating said compression liquid from said tank ( 40 ) to the compression chamber ( 2 ). 
 
     
     
         7 ) Device ( 1 ) according to  claim 6 , wherein:
 said recirculation circuit comprises an injection channel ( 47 ) for injecting said compression liquid in the compression chamber ( 2 ), the injection channel ( 47 ) being at least partially carried out in said main body ( 30 ;  130 ,  230 ;  330 ).   
     
     
         8 ) Device ( 1 ) according to  claim 6  further comprising:
 a thermostatic valve ( 10 ) arranged along said recirculation circuit of said compression liquid. 
 
     
     
         9 ) Device ( 1 ) according to  claim 8 , wherein:
 said thermostatic valve ( 10 ) comprises a body ( 46 ) carried out in a single piece with said main body ( 30 ;  130 ,  230 ).   
     
     
         10 ) Device ( 1 ) according to  claim 6  further comprising:
 means ( 12 ) for filtering said compression liquid are arranged along said circuit. 
 
     
     
         11 ) Device ( 1 ) according to  claim 10 , wherein:
 said means for filtering comprise a filter ( 12 ) that is housed in a supporting seat ( 55 ) carried out in a single piece with the main body ( 30 ;  130 ).   
     
     
         12 ) Device ( 1 ) according to  claim 1  further comprising:
 injection means ( 3 ) for injecting the gas in the compression chamber ( 2 ). 
 
     
     
         13 ) Device ( 1 ) according to  claim 12 , wherein:
 said injection means ( 3 ) comprise an intake valve ( 3 ) for the gas.   
     
     
         14 ) Device ( 1 ) according to  claim 13 , further comprising:
 a valve body ( 31 ) of the intake valve ( 3 ), said valve body ( 31 ) being carried out in a single piece with said main body ( 30 ).   
     
     
         15 ) Device ( 1 ) according to  claim 1  further comprising:
 conveying means ( 60 ), arranged downstream of said separation means ( 7 ), for conveying a separated gas of the mixture to an oil separator filter ( 13 ). 
 
     
     
         16 ) Device ( 1 ) according to  claim 1  further comprising:
 canalization means ( 49 ) for conveying said compression liquid for lubricating moving parts of said gas compression device ( 1 ). 
 
     
     
         17 ) Device ( 1 ) according to  claim 16 , wherein:
 said canalization means comprise one or more channels ( 49 ) made inside said main body ( 30 ;  130 ,  230 ;  330 ).   
     
     
         18 ) Device ( 1 ) according to  claim 1  wherein:
 said compression means comprise two helical screws ( 21 ,  22 ) meshing with each other. 
 
     
     
         19 . A gas compressor comprising:
 a main body;   a compression chamber formed in said main body having an inlet and an outlet;   compression means, placed within said compression chamber, for compressing a mixture of a gas and a compression liquid, said compression means moving the mixture to the outlet of said compression chamber;   a separator, whereby the gas and the compression liquid are separated; and   a connection channel completely made within said main body coupled to the outlet of said compression chamber and said separator,   whereby the gas compressor has a reduced size and weight with improved reliability.