Turbomachine and apparatus comprising said turbomachine

Abstract

A turbomachine, includes a case and a rotor positioned in the case so that it can rotate with respect to the case around its own longitudinal axis. The rotor includes: one blading located on the rotor and disposed in a respective transit volume bounded between the rotor and the case for the passage of a first working fluid; one helical conduit developing in loops around the longitudinal axis and extending between one inlet and one outlet for the passage of a second working fluid. The helical conduit is radially internal with respect to the blading has loops with gradually increasing or decreasing radial dimensions from the inlet towards the outlet.

1 . Turbomachine, comprising:
 a case;   a rotor positioned in the case so that it can rotate with respect to the case around its own longitudinal axis;   wherein the rotor comprises:   at least one blading mounted on the rotor and arranged in a respective transit volume bounded between the rotor and the case for the passage of a first working fluid;   at least one helical conduit developing in loops around the longitudinal axis and extending between at least one inlet and at least one outlet for the passage of a second working fluid; wherein the at least one helical conduit is radially internal with respect to the at least one blading and has loops with gradually increasing or decreasing radial dimensions from the inlet towards the o outlet.   
     
     
         2 . Turbomachine according to  claim 1 , wherein the at least one blading is disposed on a radially outer surface of the rotor and the at least one helical conduit is radially inner relative to the radially outer surface. 
     
     
         3 . Turbomachine according to  claim 1 , wherein the rotor is a solid body and the at least one helical conduit is fashioned in the solid body. 
     
     
         4 . Turbomachine according to  claim 2 , wherein the at least one inlet is located on the radially outer surface of the rotor and the at least one outlet is located on a head surface of the rotor. 
     
     
         5 . Turbomachine according to  claim 2 , wherein the at least one inlet is located near a first end of the rotor and the at least one outlet is located near a second end of the rotor opposite the first end. 
     
     
         6 . Turbomachine according to  claim 1 , wherein the at least one blading comprises a plurality of vanes or defines at least one profile of a screw. 
     
     
         7 . Turbomachine according to  claim 1 , wherein the at least one blading located in the transit volume defines a or is part of a compressor or of a pump or wherein the blading in the transit volume defines a or is part of an expander; wherein the at least one helical conduit is a bladeless expander or wherein the at least one helical conduit is a bladeless compressor or a pump. 
     
     
         8 . Turbomachine according to  claim 1 , wherein the at least one blading located in the transit volume and the at least one helical conduit are part of a same circuit and the first working fluid and the second working fluid are the same working fluid. 
     
     
         9 . Turbomachine according to  claim 1 , wherein the case has a distributor placed around the rotor and in fluid communication with the inlet of the at least one helical conduit, optionally wherein the distributor comprises a plurality of orientable directional blades. 
     
     
         10 . Turbomachine according to  claim 9 , wherein the rotor comprises inlet series of the helical conduits, wherein each series comprises a plurality of inlets disposed circumferentially around the rotor, wherein the series are positioned in different axial positions; wherein the distributor placed around the rotor is configured for inserting the second working fluid through one or more of the inlet series depending on the load. 
     
     
         11 . Turbomachine according to  claim 1 , wherein the rotor comprises a first part carrying the blading and a second part defined by a shaft or comprising a shaft; wherein the first part and the second part are separated elements and connected to each other; wherein the at least one helical conduit is fashioned in the first part or in the second part or both in the first part and in the second part. 
     
     
         12 . Turbomachine according to  claim 1 , wherein the rotor has at least an empty portion to lighten the rotor. 
     
     
         13 . Turbomachine according to  claim 1 , wherein the at least one inlet and/or the at least one outlet is/are disposed/the between vanes of the blading so as to modify a boundary layer of the first working fluid. 
     
     
         14 . Turbomachine according to  claim 1 , wherein the turbomachine is a turbopump. 
     
     
         15 . Turbomachine according to  claim 1 , wherein the turbomachine is a turbocharger. 
     
     
         16 . Refrigeration apparatus comprising:
 at least one condenser;   at least one evaporator;   at least one turbomachine according to claim  15 ;   an electric motor connected to the rotor of the turbomachine;   ducts connecting the at least one condenser, the at least one evaporator and the at least one turbomachine to form a refrigeration circuit;   wherein the ducts connect the at least one condenser and the at least one evaporator to the at least one turbomachine so as to compress a working fluid circulating in the refrigeration circuit before it enters the at least one condenser and to expand the working fluid before it enters the at least one evaporator.