Rotary compressor provided with at least one side channel

Abstract

The invention relates to a rotary compressor that includes a disc-shaped rotor having a radius R, supporting on the periphery thereof at least one first series of non-planar blades intended for accelerating the fluid to be compressed between an intake and an outlet, a casing defining on the outside at least one generally toroidal channel that is peripheral to the rotor, said at least one channel being coaxial, arranged at the radial end of said rotor and containing said blades, a static and annular core being arranged inside said at least one toroidal channel such as to define a free section A with said casing. According to the invention, the arrangements and respective shapes of the rotor, the at least one peripheral channel and said at least one series of blades are such that the ratio A/R2 is between 6% and 16%.

1 . Rotary compressor comprising a disc-shaped rotor having a radius R and supporting on the periphery thereof at least one first series of non-planar blades intended for accelerating the fluid to be compressed between an intake and an outlet, a casing defining on the outside at least one generally toroidal channel that is peripheral to the rotor, said at least one channel being coaxial, arranged at the radial end of said rotor and housing said blades, a static and annular core being arranged inside of said at least one toroidal channel in such a way as to define with said casing a free cross section A characterised in that the dispositions and respective forms of the rotor, of at least one peripheral channel and of said at least one first series of blades are such that the ratio A/R2 is between 6% and 16% and in that it comprises a third series of blades arranged in the radial extension of said rotor and in a given specific channel. 
     
     
         2 . Rotary compressor according to  claim 1  characterised in that said at least one first series of blades has a dimension h measured parallel to or perpendicular to the axis XX of rotation of the rotor, said dimension h being such that the ratio h/R is between 5% and 15%. 
     
     
         3 . Rotary compressor according to  claim 1  characterised in that said casing of said at least one peripheral channel/or said static core has reliefs intended to modify the direction of the fluid that flows inside said peripheral channel in particular between two juxtaposed blades. 
     
     
         4 . Rotary compressor according to  claim 1  characterised in that it comprises a separation part arranged in said at least one peripheral channel, between the intake and the outlet of said fluid, said separation part having a shape making it possible to progressively lower the pressure of said fluid before the intake of the fluid. 
     
     
         5 . Rotary compressor as according to  claim 1  characterised in that the blades that comprise said at least one first series of blades has a so-called circumferential orientation, globally parallel to the axis of said rotor. 
     
     
         6 . Rotary compressor according to  claim 1  characterised in that it comprises two series of blades arranged symmetrically on either side of the main plane of said rotor, each series being arranged in a specific peripheral channel. 
     
     
         7 . Rotary compressor according to  claim 1  characterised in that said rotor has a multiplicity of through-holes intended to balance the induced axial pressures. 
     
     
         8 . Rotary compressor according to  claim 1  characterised in that it comprises at least one intake stub pipe for the fluid, that exits into said at least one peripheral channel and directs therein said fluid in a direction opposite or perpendicular to the direction of rotation of said rotor. 
     
     
         9 . Rotary compressor according to  claim 1  characterised in that it comprises several peripheral channels that have free cross sections A with different values.