EP2631490B1 - Radiales Schaufelrad mit radial freiem Basisring - Google Patents

Radiales Schaufelrad mit radial freiem Basisring Download PDF

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Publication number
EP2631490B1
EP2631490B1 EP13156150.8A EP13156150A EP2631490B1 EP 2631490 B1 EP2631490 B1 EP 2631490B1 EP 13156150 A EP13156150 A EP 13156150A EP 2631490 B1 EP2631490 B1 EP 2631490B1
Authority
EP
European Patent Office
Prior art keywords
hub
plate
impeller
basic rim
base ring
Prior art date
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Active
Application number
EP13156150.8A
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English (en)
French (fr)
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EP2631490A1 (de
Inventor
Sylvain GUILLEMIN
Vittorio Michelassi
Douglas Carl Hofer
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Thermodyn SAS
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Thermodyn SAS
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Publication date
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Publication of EP2631490A1 publication Critical patent/EP2631490A1/de
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Publication of EP2631490B1 publication Critical patent/EP2631490B1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/20—Mounting rotors on shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F01D5/04—Blade-carrying members, e.g. rotors for radial-flow machines or engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/3069—Fixing blades to rotors; Blade roots ; Blade spacers between two discs or rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/34—Rotor-blade aggregates of unitary construction, e.g. formed of sheet laminae
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/60—Assembly methods
    • F05D2230/64—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins
    • F05D2230/642—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins using maintaining alignment while permitting differential dilatation

Definitions

  • the invention relates to compression impellers or impeller wheels, intended for the mechanical compression of a gas and relates more particularly to the attachment of impeller wheels on a rotary shaft of a compressor.
  • a compressor impeller conventionally comprises a hub through which the impeller attaches to the compressor shaft and a base rim, from which the blades radially extend, bonded to the hub.
  • a compressor impeller is hot-shrunk on the rotary shaft of the compressor.
  • the tightening is then calculated to be sufficient in all cases to absorb, at full speed, all forces applied to the wheel they are aerodynamic, due to the thrust, or torque transmitted.
  • a paddle wheel having a base ring free to deform radially relative to the hub, the paddle wheel also comprising a flange coupled to the base ring via the blades, the flange and the base ring having an identical mass.
  • a paddle wheel intended to be mounted on a rotary shaft comprising a base ring provided with vanes projecting from one face of the base ring, and an annular hub adapted to be coupled to the ring gear. basic and rotary shaft.
  • the impeller comprises an annular plate, and the hub, the plate and the base ring are configured to cooperate together so as to maintain the base ring axially and to maintain a freedom of movement. radial deformation of the base ring relative to the hub and the plate.
  • the mechanical fasteners consisting of the plate and the hub, and the base ring can thus have large differential expansions.
  • the hub and the plate being assembled with the base ring so as to maintain freedom of radial deformation of the base ring relative to the hub and the plate, the base ring can expand radially regardless of the expansion of the hub and plate, that is to say that the expansion of the base ring may be different from the expansion of the plate and the hub. It is thus possible to use different materials between the base ring and the mechanical fasteners. It is in particular possible to use high performance materials for the basic crown which can not generally be mounted on the shaft while the fasteners, ie the hub and the plate, are made of materials that can be shrunk onto the rotating shaft.
  • the base ring comprises a circular key on its inner perimeter adapted to cooperate with a first notch made in the hub and a second notch made in the plate, the first and the second notch being arranged facing one of the other so that the circular key of the base ring is retained in the notches when the hub, the plate and the base ring are assembled.
  • the circular key, the first notch and the second notch are dimensioned so that, on the one hand, the circular key is held axially without freedom of axial displacement and thus ensure the centering of the base ring axially, and, that on the other hand, the circular key can move radially in a space defined by the notches in particular when the base ring expands.
  • the radial dimensions of the first and second notches preferably have larger dimensions than the radial dimensions of the circular key, and the axial dimensions of the circular key are equal to the axial space. defined by the first and second notches when the hub and the plate are assembled.
  • the circular key may comprise two outer O-rings respectively disposed on either side of the base ring on the outer radial surface of the circular key, and two internal O-rings respectively disposed on either side of the ring. base on the inner radial surface of the circular key.
  • the two inner O-rings provide a radial centering of the base ring cold, that is to say while the paddle wheel is stopped, thanks to its internal diameter.
  • the two outer O-rings make it possible to maintain the centering of the base ring when the impeller is rotated, causing the base ring to expand more than the expansion of the fasteners, ie say plateau and hub. Radial centering is maintained by the natural deformation of the inner and outer O-rings as the rotating shaft rotates. At full rotational speed, the centering of the basic crown is preserved thanks to the outer diameter of the circular key.
  • the circular key may comprise a single inner O-ring disposed on the inner surface of the circular key centrally.
  • the use of two internal O-rings allows a better balancing.
  • the impeller may advantageously comprise radial guiding means capable of limiting the friction between the base ring and the hub, and between the base ring and the plate during the radial deformation of the base ring.
  • Friction between the base ring and the hub can cause degradation of the mechanical fasteners and / or the base ring. Indeed, the friction can cause the appearance of cracks in the base ring and / or in the plate and / or the hub.
  • the radial guide means comprise on each of the axial faces of the base ring at least one circular groove disposed in the circular key, the circular grooves each comprising an O-ring or rolling means.
  • the circular key thus comprises at least one groove facing the first notch made in the hub and at least one groove facing the second notch made in the plate.
  • the rolling means such as balls, rollers, or rollers for example, or the O-rings are inserted in the circular grooves and are dimensioned so that, on the axial faces of the base ring, the key circular is not in direct contact with the tray on one side and with the hub on the other side.
  • the second notch made in the plate comprises an oblique outer radial contact surface
  • the outer radial surface of the key comprises a corresponding oblique portion facing the oblique outer radial contact surface of the plate
  • the plate is assembled. with the hub so as to be deformable and deviate from the hub on a radial distal portion during the radial deformation of the base ring.
  • the circular key exerts a radial force on the plate and in particular on the oblique outer radial contact surface.
  • the force thus applied by the circular key on the oblique outer radial contact surface results, thanks to the flexibility of the plate and in particular of its distal portion, the spacing of the plate relative to the hub and therefore an increase in the space between the two notches.
  • the point of support between the outer radial surface of the circular key and the oblique outer radial contact surface of the plate then moves allowing both the radial expansion of the crown and the application of an axial holding force by the distal portion of the plate on the circular key to the hub, which maintains the centering of the base ring.
  • the plate may comprise centering means and the hub may comprise complementary centering means capable of cooperating with the centering means.
  • the centering means and the complementary centering means thus make it possible to assemble the hub and the plate in a radially centered manner, that is to say with respect to the axis of rotation of the impeller, and thus to obtain a uniform axial holding force applied to the base ring for axial centering of the base ring.
  • the centering means may advantageously comprise a centering ring fixed on the plate and having a toothing facing the hub, and the complementary centering means comprise a complementary centering ring fixed on the hub and having a complementary toothing facing the plate suitable for to cooperate with the toothing of the centering ring.
  • the centering ring and the complementary centering ring may correspond to an axial gear such as a Hirth ® type toothing.
  • the centering means may comprise a proximal portion of the plate projecting conically facing the hub and having the axis of the rotary shaft, and the complementary centering means comprise in the hub a conical recess facing the plate having axis the rotary shaft, the tapered projecting portion and the conical recess being adapted to cooperate during assembly of the plate with the hub.
  • the transmission of the torque between the shaft and the plate can be achieved by friction between the conically projecting portion. of the plate and the conical recess of the hub, or by the use of a pin or a key between the hub and the plate.
  • the hub may be disposed on a first shaft portion and the plate may be disposed on a second shaft portion, the first shaft portion and the second shaft portion being secured by fastening means so as to secure the hub and the plate.
  • the first shaft portion may thus comprise a threaded orifice along the axis of rotation of the shaft on the end facing the second shaft portion, and the second shaft portion may comprise on the end piece. view of the first shaft portion a screw whose thread corresponds to the thread of the orifice of the first shaft portion.
  • the impeller may also include a bolted fastening flange adapted to secure the plate with the hub.
  • the fixing flange may for example be through in the plate and threaded in the hub so as to fix a screw in the hub through the plate, with the head of the screw resting on one side of the plate.
  • the impeller comprises a flange coupled to the base ring via the blades, the flange and the base ring having an identical mass.
  • the hub may be shrunk or integrated on at least a portion of the rotary shaft of the compressor.
  • the tray can also be shrunk or integrated on at least a portion of the rotary shaft of the compressor.
  • a motor-compressor unit comprising a motor, a compressor and a compressible gas-tight common housing in which are mounted the engine and the compressor, the compressor comprising at least a paddle wheel as defined above.
  • FIG. 1 there is shown an example of a compressor unit provided with impeller wheels made according to the invention.
  • the motorcycle compressor group illustrated on the figure 1 essentially comprises a motor 1, constituted for example by a variable speed electric motor driving a rotor 2 in rotation, itself driving at identical speed a rotary shaft 3 on which is mounted a paddle wheel 4.
  • the motor-compressor unit here comprises a single compression stage constituted by radial vane wheels 4 which ensures the suction of a gas delivered from an inlet pipe 5 to cause an increase in its pressure and deliver it at the exit 5 '.
  • the rotor 2 is supported by two end bearings 6 and 7.
  • the rotary shaft 3 which is also supported by two end bearings 8 and 9.
  • the rotor 2 and the rotary shaft 3 are connected by a flexible coupling 10.
  • the rotor and the rotary shaft could also be connected by a fixed coupling.
  • one of the bearings, such as 7 and 8, could be omitted.
  • the assembly that is to say the engine 1 and the compression stage is disposed in a gas-tight common housing 11 handled by the compressor.
  • the engine 1 is here at the suction pressure of the motor-compressor unit.
  • FIGS. 2a and 2b respectively show an exploded view and an assembled view of a first example of paddle wheels according to one embodiment of the invention, which can be mounted in the compressor unit of the figure 1 .
  • the impeller 4 comprises three distinct parts: a base ring 12, a hub 13, a plate 14.
  • the base ring 12 comprises a distal portion 12a and a proximal portion 12b relative to its axis of rotation coincides with the axis of rotation of the rotary shaft 3.
  • the base ring 12 extends in a plane orthogonal to its axis of rotation and comprises a first face 12f and a face opposite the 12o.
  • the base ring 12 has, mainly on its distal portion 12a, blades 15 projecting on the first face 12f of the base ring 12 opposite a flange 16.
  • the flange 16 comprises a distal portion 16a and a proximal portion 16b with respect to its axis of rotation coincides with the axis of rotation of the rotary shaft 3.
  • the distal portion 16a of the flange 16 is disposed parallel to the distal portion 12a of the base ring 12 and is coupled to the vanes 15 on a face 16f opposite the base ring 12.
  • the flange 16 and the base ring 12 have a similar mass so as to obtain an almost symmetrical centrifugal force on either side of the connection with the blades 15.
  • the stresses in the base ring 12 are thus less important, and thus promotes a quasi-radial deformation of the base ring 12.
  • the base ring 12 has on its proximal portion 12b a circular key 17.
  • the circular key 17 is in particular arranged along the inner perimeter of the base ring 12.
  • the circular key 17 comprises in this example a section of generally square shape .
  • the hub 13 has an annular shape whose axis of rotation coincides with the axis of the rotary shaft 3.
  • the hub 13 has a bearing face 13f orthogonal to the axis of the rotary shaft 3 and intended to facing the plate 14, a distal portion 13a and a proximal portion 13b with respect to its axis of rotation.
  • the plate 14 also has an annular shape whose axis of rotation coincides with the axis of the rotary shaft 3.
  • the plate comprises a bearing face 14f orthogonal to the axis of the rotary shaft 3 and intended to be facing the hub 13, a distal portion 14a and a proximal portion 14b relative to its axis of rotation.
  • the hub 13 has on the distal portion 13a of its bearing face 13f a first notch 18 adapted to partially receive the circular key 17.
  • the plate has on the distal portion 14a of its bearing face 14f a second notch 19 fit to receive in part the circular key 17.
  • the first notch 18 and the second notch 19 are made to be facing each other with identical dimensions so that the second notch 19 is symmetrical to the first notch 19 relative to the axis defined by the bearing faces 13f and 14f when the hub and the plate are in contact.
  • the notches 18 and 19 may not be symmetrical with respect to the circular key 17, as long as the junction between the circular key 17 and the remainder of the base ring 12 is centered with respect to the base ring 12.
  • the notches 18 and 19 may thus comprise complementary shapes so as to axially hold the circular key 17 and to define a passage for the junction between the circular key 17 and the remainder of the crown. base 12, the junction being centered with respect to the circular key 17 and the remainder of the base ring 12.
  • the notches 18 and 19 are dimensioned so as to maintain the circular key 17 axially, that is to say to be in abutment with the circular key 17 in a direction parallel to the axis of rotation of the the basic crown 12.
  • the circular key 17 may comprise a section of shape different from the square shape, such as for example a hexagonal, octagonal shape, or any other shape adapted to cooperate with the first and second notches 18 and 19.
  • the radial dimensions of the notches 18 and 19 are larger than the dimension of the circular key 17 in a direction orthogonal to the axis of rotation of the base ring 12. This is so as to maintain a freedom of radial displacement of the circular key 17 especially when the base ring 12 is deformed with the speed of rotation.
  • the cold radial centering of the base ring 12, that is to say when the paddle wheel 4 is stopped or at low speed, is achieved thanks to the internal diameter of the circular key 17, while the centering of the base ring 12 at full speed is achieved through the outer diameter of the circular key, after the base ring has expanded.
  • the circular key 17 comprises an inner radial surface 17i oriented towards the axis of rotation of the base ring and an outer radial surface 17e opposite to the inner radial surface 17i.
  • the circular key 17 comprises on its outer radial surface 17e two outer O-rings 20.
  • the two outer O-rings 20 are respectively disposed on either side of the base ring 12, that is to say one of the side of the first face 12f of the base ring 12 and the other of the opposite side 12o.
  • the circular key 17 comprises on its inner radial surface 17i two internal O-rings 21 respectively disposed on either side of the base ring 12, that is to say symmetrically on both sides of the plane in which the base ring 12 extends.
  • the base ring 12 is centered radially thanks to the internal diameter of the circular key 17.
  • the base ring 12 can deform more rapidly than the hub 13 and the plate 14 which constitute the fastening elements. and this with slight restraints due to the frictional forces at the radial guide between the circular key 17 and the hub, on the one hand, and between the circular key 17 and the plate 14, on the other hand.
  • the centering is preserved thanks to the two outer O-rings 20 and the two inner O-rings 21 which deform naturally.
  • the plate and the hub are configured to allow the base ring to be centered thanks to the outer diameter of the circular key 17.
  • the base ring 12 reproduces the opposite deformation until it is again centered at low speed.
  • the hub 13 is integrated with a first shaft portion 4a and the plate 14 is integrated with a second shaft portion 3b.
  • the hub 13 and the plate 14 could also be shrunk respectively on the first and the second shaft portions 3a and 3b.
  • the assembly of the hub 13 with the plate 14 is made by screwing the second shaft portion 3b into the first shaft portion 3a, the first shaft portion 3a having a threaded orifice along its axis of rotation on a hub opposite the second shaft portion 3b, and the second shaft portion 3b having a tip opposite the first shaft portion 3a having a thread corresponding to the thread of the orifice of the first portion of tree 3a.
  • the centering of the hub 13 with the plate 14 is achieved by means of an axial gear, for example by means of a gear system. Hirth ® .
  • the plate 14 comprises a centering ring 22a fixed on the bearing face 14f of the plate 14.
  • the hub 13 comprises a complementary centering ring 22b fixed on the bearing face 13f of the hub 13.
  • the centering ring 21a cooperates with the complementary centering ring 21b for the radial centering, and thus radially match the first and second notches 18 and 19.
  • the circular key 17 ' comprises radial guiding means making it possible to avoid friction between the circular key 17' and the hub 13 on the one hand, and between the circular key 17 'and the plate 14 'somewhere else.
  • the radial guide means comprise on the first face 12f and the opposite face 12o of the base ring 12 at least one circular groove 23 disposed in the circular key 17 '.
  • Each circular groove 23 comprises rolling balls 24 for separating the circular key 17 'of the hub 13 on the one hand, and the circular key 17' of the plate 14 on the other hand.
  • This embodiment also differs from that shown in the Figures 2a and 2b from the centering means and the fixing means of the hub 13 with the plate 14.
  • the paddle wheel 4 illustrated on the figure 3 comprises as fastening means, a bolted fastening flange 24 adapted to secure the plate 14 with the hub 13.
  • the fastening flange 24 comprises a threaded hole 25 blind in the hub 13, the opening of the threaded hole 25 being disposed on the bearing flange 13f of the hub 13.
  • the fastening flange 24 also comprises a through hole 26 formed in the plate 14 facing the threaded hole 25.
  • the through orifice 26 comprises a stop 27 so that a screw 28 resting on the stop 27 can hold tight the plate 14 on the hub 13.
  • the plate 14 comprises a projecting portion 29 on its proximal portion 14b.
  • the projecting portion extends towards the hub 13 with a tapered shape with decreasing section.
  • the hub 13 comprises a complementary recess 30 made in its proximal portion 13b with a conical shape adapted to cooperate with the projecting portion 29 of the plate 14.
  • the impeller 4 may not comprise a bolted fastening flange 24, the transmission of the torque between the hub 13 and the plate 14 may be by friction between the protruding portion 29 and the surfaces of the flange 24.
  • the Figures 4a and 4b show a third example of impeller 4 according to one embodiment of the invention. Elements bearing the same references as on the Figures 2a and 2b are the same.
  • the figure 4a represents the third example of a paddle wheel 4 at a stop or at a slow rotational speed, while the figure 4b represents the third example of a paddle wheel 4 with a high rotational speed.
  • the second notch 19 made in the plate 14 comprises an outer radial contact surface 31 oblique so as to form an obtuse angle with the face of the notch 32 facing the hub 13.
  • the outer radial surface 17 “e of the circular key 17” comprises an oblique portion facing and parallel to the oblique outer radial contact surface 31 of the plate 14.
  • the plate 14 is secured to the hub 13 by means of a fastening flange 24.
  • the fastening flange 24 "is mounted on the plate 14 at the proximal portion 14b so that the plate 14 can be deformed. and move away from the hub 13 on a distal portion 14a during the radial deformation of the base ring 12.
  • the base ring 12 can thus deform radially, the circular key 17 "moving slightly radially away from its axis of rotation due to the deformation of the plate 14 , and more specifically of the distal portion 14a of the plate, the oblique portion of the outer radial surface 17 “e of the circular key 17” sliding along the outer radial contact surface 31 oblique.
  • the invention is not limited to these three different embodiments. It also includes all possible combinations between these embodiments.
  • the invention thus makes it possible to provide a blade wheel with a base ring having a freedom of radial deformation, and a possibility of using materials for the base ring that are not usable for the fasteners.
  • the plate 14 can be fixed by bolting on the hub 13 and thus constitute a separate element of the rotary shaft 3.
  • the circular key 17 is provided with a set of radial contact surfaces cooperating with corresponding oblique surfaces formed on the hub, on the one hand and on the plate, on the other hand. go.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Claims (14)

  1. Schaufelrad (4), das dazu bestimmt ist, an einer drehbaren Welle (3) montiert zu werden, umfassend einen Basisring (12), der mit Schaufeln (15) versehen ist, die an einer Seite (12f) des Basisrings (12) hervorstehen, eine ringförmige Nabe (13), die in der Lage ist, mit dem Basisring (12) und der drehbaren Welle (3) gekoppelt zu werden, einen ringförmigen Teller (14) und eine Scheibe (16), die mit dem Basisring (12) über die Schaufeln (15) gekoppelt ist, wobei die Nabe (13), der Teller (14) und der Basisring (12) konfiguriert sind, um gemeinsam dergestalt zusammenzuwirken, dass der Basisring (12) axial gehalten wird und eine Freiheit zur radialen Verformung des Basisrings (12) bezogen auf die Nabe (13) und den Teller (14) beibehalten wird, wobei das Schaufelrad dadurch gekennzeichnet ist, dass die Scheibe und der Basisring eine identische Masse besitzen.
  2. Schaufelrad (4) nach Anspruch 1, bei dem der Basisring (12) einen kreisförmigen Keil (17) an seinem Innenumfang umfasst, der in der Lage ist, mit einer ersten Nut (18), die in der Nabe (13) hergestellt ist, und einer zweiten Nut (19), die im Teller (14) hergestellt ist, zusammenzuwirken, wobei die erste und die zweite Nut (18, 19) einander gegenüberliegend derart angeordnet sind, dass der kreisförmige Keil (17) des Basisrings (12) in den Nuten (18, 19) zurückgehalten wird, wenn die Nabe (13), der Teller (14) und der Basisring (12) zusammengefügt werden.
  3. Schaufelrad (4) nach Anspruch 2, bei dem der kreisförmige Keil (17) zwei äußere O-Ringe (20), die jeweils beiderseits des Basisrings (12) an der äußeren radialen Fläche (17e) des kreisförmigen Keils (17) angeordnet sind, und zwei innere O-Ringe (21), die jeweils beiderseits des Basisrings (12) an der inneren radialen Fläche (17i) des kreisförmigen Keils (17) angeordnet sind, umfasst.
  4. Schaufelrad (4) nach einem der Ansprüche 2 und 3, umfassend Mittel zur radialen Führung, die in der Lage sind, die Reibungen zwischen dem Basisring (12) und der Nabe (13), und zwischen dem Basisring (12) und dem Teller (14) bei der radialen Verformung des Basisrings (12) zu begrenzen.
  5. Schaufelrad (4) nach Anspruch 4, bei dem die Mittel zur radialen Führung an jeder der Seiten (12o, 12f) des Basisrings (12) mindestens eine kreisförmige Rille (23), die im kreisförmigen Keil (17) angeordnet ist, umfassen, wobei die kreisförmigen Rillen (23) jeweils einen O-Ring oder Rollmittel (24) umfassen.
  6. Schaufelrad (4) nach Anspruch 2, bei dem die zweite Nut (19), die im Teller (14) hergestellt ist, eine schräge äußere radiale Kontaktfläche umfasst, die äußere radiale Fläche des Keils einen entsprechenden schrägen Abschnitt gegenüber der schrägen äußeren radialen Kontaktfläche des Tellers umfasst, und der Teller mit der Nabe dergestalt zusammengefügt ist, dass er sich verformen und in einem distalen Abschnitt von der Nabe entfernen kann, wenn die radiale Verformung des Basisrings erfolgt.
  7. Schaufelrad (4) nach einem der Ansprüche 1 bis 6, bei dem der Teller (14) Mittel zum Zentrieren umfasst und die Nabe ergänzende Mittel zum Zentrieren umfasst, die in der Lage sind, mit den Mitteln zum Zentrieren zusammenzuwirken.
  8. Schaufelrad (4) nach Anspruch 7, bei dem die Mittel zum Zentrieren einen Zentrierring (22a) umfassen, der am Teller (14) befestigt ist und eine Zahnung gegenüber der Nabe (13) aufweist, und die ergänzenden Mittel zum Zentrieren einen ergänzenden Zentrierring (22b) umfassen, der an der Nabe (13) befestigt ist und eine ergänzende Zahnung gegenüber dem Teller (14), die in der Lage ist, mit der Zahnung des Zentrierrings (22a) zusammenzuwirken, aufweist.
  9. Schaufelrad (4) nach Anspruch 7, bei dem die Mittel zum Zentrieren einen hervorstehenden proximalen Abschnitt des Tellers (29) konischer Form gegenüber der Nabe (13), dessen Achse die drehbare Welle (3) ist, umfassen, und die ergänzenden Mittel zum Zentrieren in der Nabe (13) eine Aussparung (30) konischer Form gegenüber dem Teller (14), deren Achse die drehbare Welle (3) ist, umfassen, wobei der hervorstehende konische Abschnitt (29) und die konische Aussparung (30) in der Lage sind, beim Zusammenfügen des Tellers (14) mit der Nabe (13) zusammenzuwirken.
  10. Schaufelrad (4) nach einem der Ansprüche 1 bis 9, bei dem die Nabe (13) an einem ersten Wellenabschnitt (3a) angeordnet ist und der Teller (14) an einem zweiten Wellenabschnitt (3b) angeordnet ist, wobei der erste Wellenabschnitt (3a) und der zweite Wellenabschnitt (3b) durch Befestigungsmittel dergestalt fest verbunden sind, dass die Nabe (13) und der Teller (14) fest verbunden sind.
  11. Schaufelrad (4) nach einem der Ansprüche 1 bis 10, umfassend einen verschraubten Befestigungsflansch (24), der in der Lage ist, den Teller (14) fest mit der Nabe (13) zu verbinden.
  12. Schaufelrad (4) nach einem der Ansprüche 1 bis 11, bei dem die Nabe (13) an mindestens einem Teil der drehbaren Welle (3) aufgeschrumpft oder integriert ist.
  13. Schaufelrad (4) nach einem der Ansprüche 1 bis 12, bei dem der Teller (14) an mindestens einem Teil der drehbaren Welle (3) aufgeschrumpft oder integriert ist.
  14. Kompressor, dadurch gekennzeichnet, dass er mindestens ein Schaufelrad (4) nach einem der Ansprüche 1 bis 13 umfasst.
EP13156150.8A 2012-02-21 2013-02-21 Radiales Schaufelrad mit radial freiem Basisring Active EP2631490B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1251542A FR2987069B1 (fr) 2012-02-21 2012-02-21 Roue radiale aubee a couronne de base libre radialement

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EP2631490A1 EP2631490A1 (de) 2013-08-28
EP2631490B1 true EP2631490B1 (de) 2016-12-14

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EP (1) EP2631490B1 (de)
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DE102016215738A1 (de) 2016-08-23 2018-03-01 Siemens Aktiengesellschaft Laufrad, Verfahren zur Fertigung

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Also Published As

Publication number Publication date
FR2987069A1 (fr) 2013-08-23
EP2631490A1 (de) 2013-08-28
BR102013004122A2 (pt) 2017-05-02
US9689401B2 (en) 2017-06-27
FR2987069B1 (fr) 2016-01-29
US20130216393A1 (en) 2013-08-22

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