Rotor for a Rotary Machine and a Rotary Machine

Abstract

The invention relates to a rotor for a rotary machine and to a rotary machine equipped with said rotor, wherein the rotor revolves in a gaseous or liquid medium and has, at least on one of its lateral surfaces, a profile with at least one convex elevation for producing a pressure difference. This rotor is characterized by the fact that the convex elevation is formed as an airfoil profile of an aircraft, and the rotor has an axial cavity on the inside. In this case, the rotor is connected to at least one chamber for guiding the medium provided in or away, wherein at least one passage opening is provided between the cavity and the outer lateral surface in the region of the airfoil profile. Such a rotor within different housing formations forms a rotary machine, which can be used as a pump, a compressor, a condenser, a blower, a turbomachine, a turbine or as a pressure neutralizer.

1 . A rotor for a rotary machine that revolves in a gaseous or liquid medium comprising, on at least one lateral surface of the rotor, a profile comprising at least one convex elevation for producing a pressure difference, the convex elevation being formed as an airfoil profile and, an axial cavity inside the rotor, and wherein the rotor communicates with at least one chamber for supplying or removing the medium and at least one passage opening is provided between the axial cavity and an outer lateral surface of the rotor in the region a vicinity of the airfoil profile. 
     
     
         2 . The rotor as claimed in  claim 1 , further comprising a stator, at least one impeller and a shaft which is connected to the impeller in a torsionally rigid manner and is rotatably mounted in the stator. 
     
     
         3 . The rotor as claimed in  claim 2 , wherein the impeller is substantially cylindrical and includes the axial cavity, the axial cavity being cylindrical and the airfoil profile being arranged either on the outer lateral surface or on an inner lateral surface of the rotor. 
     
     
         4 . The rotor as claimed  claim 3 , wherein at least one of the airfoil profiles is arranged axially and tangentially on one of the lateral surfaces of the impeller, the convex elevation being radial and, counter to the direction of rotation, merging with an elongated, descending run-out region, the distance of the run-out region from the axis of rotation decreasing in the outer lateral surface and increasing in the inner lateral surface and at or in the end region of which at least one of the passage openings to the inner cavity is arranged. 
     
     
         5 . The rotor as claimed in  claim 2 , wherein the impeller comprises a metal, a plastic, a glass fiber composite or a ceramic material. 
     
     
         6 . The rotor as claimed in  claim 2 , wherein the impeller is lamellar in its construction and comprises at least one lamella ring with at least one of the airfoil profiles and an arrangement of at least one lamella element with at least one other of the airfoil profiles which are joined together in axial alignment, the lamella elements being sufficiently set apart from one another tangentially to form at least one of the passage openings. 
     
     
         7 . The rotor as claimed in  claim 4 , wherein the convex elevation describes a reference circle surface which has a defined radius and merges, counter to the direction of rotation, with the descending run-out region which extends rectilinearly, slightly convexly or slightly concavely and in the region of which or at the end of which the passage opening is arranged. 
     
     
         8 . The rotor as claimed in  claim 7 , wherein the descending run-out region is slightly concave in its formation and, at its end, a radially outwardly directed tip is arranged in the manner of a spoiler as a tear-off edge. 
     
     
         9 . The rotor as claimed in  claim 2 , wherein the impeller is axially multistaged and comprises a plurality of spaced-apart impeller parts which each act as a separate impeller, the impeller parts being arranged in axial succession in the direction of the axis of rotation and being connected to one another or to the shaft in a torsionally rigid manner. 
     
     
         10 . The rotor as claimed in  claim 2 , wherein the impeller is radially multistaged and comprises a plurality of impellers having different diameters arranged coaxially in one another and symmetrically to the axis of rotation and connected to one another and/or to the shaft in a torsionally rigid manner. 
     
     
         11 . A rotary machine comprising a rotor as claimed in  claim 2 , wherein the rotary machine has, as the stator, a housing in which the rotor is mounted and which forms, with either the outer lateral surface and/or the inner lateral surface of the rotor, at least one chamber which, on rotation, displays a difference in pressure from the surrounding gaseous or liquid medium. 
     
     
         12 . The rotary machine as claimed in  claim 11 , wherein the housing forms, as the chamber in which the medium is supplied, an inlet chamber and, as the chamber in which the medium is removed, an outlet chamber. 
     
     
         13 . The rotary machine as claimed in  claim 11 , wherein the rotary machine comprises at least one rotor, the outer lateral surface of which is surrounded by a housing part and forms therewith on the rotor the inlet chamber or the outlet chamber and has at least. one inlet opening and/or outlet opening. 
     
     
         14 . The rotary machine as claimed in  claim 12 , wherein the rotary machine comprises at least one rotor, the inner cavity of which is covered by at least one housing part and forms with the cavity the inlet chamber or the outlet chamber and has at least one inlet opening and/or outlet opening. 
     
     
         15 . The rotary machine as claimed in  claim 11 , wherein the rotary machine comprises at least one inlet chamber and an outlet chamber, each of said chambers having an inlet opening or outlet opening. 
     
     
         16 . The rotary machine as claimed in  claim 11 , wherein the rotary machine comprises at least one rotor with an axially multistage impeller and the outer lateral surfaces of the rotor are surrounded by a separate housing part which has a respective inlet opening for a subsequent stage with a further impeller part or an inlet opening or outlet opening. 
     
     
         17 . The rotary machine as claimed in  claim 11 , wherein the rotary machine comprises at least one rotor with a radially multistage impeller which is surrounded by at least one housing part and/or the cavities which are covered by at least one of the housing part, at least one of the housing parts being provided with an inlet opening or outlet opening. 
     
     
         18 . The rotary machine as claimed in  claim 11 , wherein the rotary machine is formed as a drive turbine and contains at least one rotor which has an impeller and is surrounded by a cylindrical housing part which encloses the rotor and contains an axial inlet opening for supplying a gaseous or liquid medium and for introducing a shaft and has, at an opposing axial end, a bottleneck-shaped outlet opening. 
     
     
         19 . The rotary machine as claimed in  claim 11 , wherein the rotary machine is formed as a pump, compressor, condenser, turbine, turbomachine or pressure neutralizer. 
     
     
         20 . The rotary machine as claimed in  claim 11 , wherein the rotary machine is formed to be driven rotationally by means of a gaseous pressurized or liquid medium and includes at least one inlet chamber for directional supply of the pressurized gaseous or liquid medium, which inlet chamber is formed so that flow of the pressurized gaseous or liquid medium is directed toward the convex elevation of the rotatably mounted rotor.