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EP3488092A1 - Flow machine and method for the production thereof - Google Patents

Flow machine and method for the production thereof

Info

Publication number
EP3488092A1
EP3488092A1 EP17702102.9A EP17702102A EP3488092A1 EP 3488092 A1 EP3488092 A1 EP 3488092A1 EP 17702102 A EP17702102 A EP 17702102A EP 3488092 A1 EP3488092 A1 EP 3488092A1
Authority
EP
European Patent Office
Prior art keywords
flow
foam
stator
damping element
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP17702102.9A
Other languages
German (de)
French (fr)
Inventor
Richard BÜSSOW
Robert KLAWES
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MAN Energy Solutions SE
Original Assignee
MAN Energy Solutions SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MAN Energy Solutions SE filed Critical MAN Energy Solutions SE
Publication of EP3488092A1 publication Critical patent/EP3488092A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
    • F02C6/04—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output
    • F02C6/10—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output supplying working fluid to a user, e.g. a chemical process, which returns working fluid to a turbine of the plant
    • F02C6/12—Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/406—Casings; Connections of working fluid especially adapted for liquid 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F04D29/444—Bladed diffusers
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/663—Sound attenuation
    • F04D29/664—Sound attenuation by means of sound absorbing material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00—Manufacture
    • F05B2230/20—Manufacture essentially without removing material
    • F05B2230/21—Manufacture essentially without removing material by casting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00—Manufacture
    • F05B2230/20—Manufacture essentially without removing material
    • F05B2230/22—Manufacture essentially without removing material by sintering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/10—Stators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/96—Preventing, counteracting or reducing vibration or noise
    • F05B2260/964—Preventing, counteracting or reducing vibration or noise by damping means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2280/00—Materials; Properties thereof
    • F05B2280/60—Properties or characteristics given to material by treatment or manufacturing
    • F05B2280/6012—Foam
    • 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
    • F05D2230/30—Manufacture with deposition of material
    • F05D2230/31—Layer deposition
    • 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
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/52—Outlet
    • 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
    • F05D2260/00—Function
    • F05D2260/96—Preventing, counteracting or reducing vibration or noise
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/50—Intrinsic material properties or characteristics
    • F05D2300/514—Porosity

Definitions

  • the invention relates to a turbomachine, in particular a radial flow machine, and a method for producing the same.
  • No. 6,669,436 B2 discloses a turbomachine, namely a radial compressor, with a rotor having rotor blades and a stator having stator vanes.
  • the stator vanes of the stator are designed as, in the flow direction of the medium to be compressed, the rotor blades downstream vanes of a diffuser.
  • the guide vanes are thus positioned in the region of a flow channel, which lead away from the rotor blades. It is furthermore known from US Pat. No. 6,669,436 B2 to provide a sound damping element in the region of the diffuser, namely in the region of the guide vanes of the diffuser.
  • This sound attenuation element is an integral part of a diffuser ring, which is designed as a plate-like ring with a plurality of openings, wherein the openings lead to cavities.
  • the sound damping element known from US Pat. No. 6,669,436 B2 which is an integral part of a diffuser ring, acts as a resonator having cavities communicating via openings with the flow channel in the area of the diffuser. The damping effect of such a sound damping element is limited.
  • the present invention has the object to provide a novel flow machine and method for producing the same. This object is achieved by a turbomachine according to claim 1.
  • the stator has at least one foam-like, porous sound-damping element in the region of at least one flow channel.
  • the soundproofing element has good soundproofing properties and can be easily and inexpensively manufactured.
  • the respective foam-type sound damping element is designed as a metal foam element, which is preferably produced by means of a generative production method and designed individually as a sintered metal foam-like element.
  • a produced via a generative manufacturing method metal foam element as a sound attenuation element is particularly preferred.
  • the porosity of the respective foam-type sound-damping element is not uniformly distributed with regard to the number of pores and / or pore depth but varies locally.
  • the variation of the porosity is not only dependent on the pore size, but also on the material density at a constant pore size.
  • the variation of the pore size and pore shape also influences the porosity.
  • the sound damping properties and strength properties can be optimally adjusted.
  • the respective foam-like sound damping element is an integral part of a vanes having diffuser.
  • the guide vanes preferably have a flow inlet edge, a flow outlet edge and flow guide surfaces extending between these edges, wherein a larger number of pores and / or deeper pores are and / or are formed in a middle region between the flow inlet edge and the flow outlet edge in regions adjacent to the flow entry edge and the flow exit edge, and / or wherein a larger number of pores and / or deeper pores are formed in a middle region between the flow guide surfaces of adjacent vanes and / or are inward of the respective flow guide surface adjacent areas.
  • This can be optimally adjusted in the area of the diffuser, the sound damping properties.
  • walls bounding the respective flow channel and / or guide vanes positioned in the respective flow channel are designed, at least in sections, as a foam-like, porous sound damping element. This allows optimal adjustment of sound damping properties in the region of a stator-side flow channel of a turbomachine.
  • the method for producing the turbomachine according to the invention is defined in claim 10.
  • FIG. 1 shows an axial section through a flow machine designed as a radial compressor
  • FIG. 2 shows a view in the direction II of FIG. 1 of a diffuser of the radial compressor of FIG. 1;
  • Fig. 3 is a view in the direction II of Fig. 1 to an alternative diffuser of
  • FIG. 4 shows a view in the direction II of FIG. 1 of a further alternative diffuser of the radial compressor of FIG. 1; FIG. and
  • Fig. 5 is an axial section through another designed as a radial compressor
  • the invention relates to a turbomachine, in particular a radial flow machine. Furthermore, the invention relates to a method for producing such a turbomachine.
  • FIGS. 1 and 2 show different views of a turbomachine 10 designed as a radial compressor.
  • the turbomachine 10 designed as a radial compressor 10 has a stator 13, wherein the stator 13 on the one hand to the rotor blades 1 of the rotor. 1 1 leading, extending in the axial direction of the flow channel 14 and on the other hand, a radially extending, of the blades 12 of the rotor 1 1 leading away flow channel 15 at least partially limited.
  • a diffuser 1 6 Part of the stator 13 is a diffuser 1 6, which has guide vanes 17.
  • the guide vanes 17 of the diffuser 1 6 are seen in the flow direction of the medium to be compressed, downstream of the blades 12 of the rotor 1 1 positioned in the radially extending flow channel 15. Downstream of the diffuser 1 6 is followed by a spiral discharge housing 18 of the stator 13 at.
  • the flow direction of the medium to be compressed is visualized in FIG. 1 by arrows 19.
  • FIG. 2 shows a view II of the diffuser 16, namely the guide vanes 17 of the diffuser 16 and a wall 24 thereof.
  • Each of the guide vanes 17 has a flow inlet edge 20, a flow outlet edge 21 and flow guide surfaces 22 extending between the respective flow inlet edge 20 and the flow outlet edge 21.
  • the stator 13 in the region of at least one flow channel 14 and / or 15 on a foam-like, porous sound damping element 23.
  • the respective foam-like, porous sound damping element 23 may be formed as a metal foam element, in particular as a sintered metal-like element, or as a plastic foam element. In the case of a metal foam element, the same is preferably produced via a generative manufacturing method.
  • the porosity of the respective foam-type sound damping element is distributed uniformly, that is, the foam-like sound damping element 23 has an equal distribution in terms of number and depth and size of the pores.
  • FIGS. 3 and 4 show variants of the invention in which the respective foam-type sound damping element 23 has a not uniformly distributed porosity with regard to the number of pores and pore depth, but rather a locally different porosity.
  • the radially extending walls 24 which define the radially extending streams are also shown in FIG. Narrowing channel 15 in the region of the diffuser 1 6 sections limit, partially executed as a foam-like, porous sound attenuation element 23.
  • a larger number of pores and a greater depth of the pores are provided or formed in a middle region between the flow inlet edge 20 and the flow outlet edge 21 than in regions directly adjoining the flow inlet edge 20 and the flow outlet edge 21.
  • the porosity of the walls 24 of the rotor 13 bordering in the radial direction in the region of the diffuser 16 is additionally locally so different that in a central region between the flow guide surfaces 22 of adjacent guide vanes 17 of the diffuser 16 a larger number of pores and deeper pores is or are formed as immediately adjacent to the respective flow-guiding surface 23 of the respective vane 17th
  • FIG. 5 shows a variant of the invention in which the walls 24 of the stator 13, which delimit the radially extending flow channel 15 in the region of the diffuser 16, have a locally different porosity, viewed over their axial thickness.
  • larger pores are formed in an axially middle region of these walls 24 than directly adjacent to the flow channel 15.
  • the respective flow channel 14, 15 bounding walls 24 are at least partially designed as foam-like, porous sound attenuation elements 13, it is alternatively or additionally also possible that in the respective flow channel 14, 15 positioned guide vanes 17 at least partially as a foam-like, porous Sound attenuation elements 13 are executed.
  • the stator 13 has at least one foam-like, porous sound-damping element 23 in the area of the flow channel 15 leading away from the rotor blades 12 of the rotor 11.
  • stator 13 it is also possible for the stator 13 to have at least one such foam-like, porous sound-damping element 23 in the region of the flow channel 14 leading to the rotor blades 12 of the rotor 11.
  • the turbomachine 10 is designed as a radial compressor. It is also possible for the invention to be used in a radial flow turbine designed as a radial turbine. In a radial turbine, a flow channel leading to the blades of the rotor extends in the radial direction and a flow channel leading away from the rotor blades in the axial direction.
  • turbomachines which combine a radial and / or axial design.
  • the respective foam-like, porous sound-damping element 23 produces a viscous sound attenuation. Sound can be damped more effectively than conventional resonator silencers. In particular, high-frequency vibration excitations of the rotor and the rotor of downstream assemblies can be reduced. There is also less pressure loss in the flow than in the case of resonator silencers.
  • the invention also relates to a method for producing a turbomachine, for this purpose, the rotor 1 1 and the stator 13 are provided.
  • the rotor 1 1 may be a precision casting, machined
  • Forging component or machined integrally manufactured component act.
  • stator 13 may at least partially be a precision casting component.
  • the stator 13 is produced at least in sections, namely in the area of the or each foam-like, porous sound damping element 23, via a generative manufacturing process.
  • the respective foam-type sound-damping element 23 is formed as a metal foam element, in particular an additive manufacturing process such as. (Selective) laser beam melting or electron beam welding can be used.
  • the metal foam is then a sintered metal-like, generated metal foam.
  • the diffuser 16 has at least one foam-like porous sound attenuation element 23, preferably a so-called diffuser ring of the diffuser 16 which provides at least a portion of one of the walls 24 of the stator diffuser 16 and integrally also the vanes 17 thereof via a generative manufacturing process manufactured.
  • the respective sound damping element 23 is an integral part of the diffuser ring and thus of the diffuser 1 6.
  • the diffuser ring provides the vanes 17 of the diffuser 16 and, at least in sections, one of the walls 24 delimiting the flow channel 15 extending in the radial direction.
  • the section of the stator 13 which comprises a foam-like, porous sound-deadening element 23 and is produced by a generative manufacturing method is connected to an adjacent, preferably investment-cast, section of the stator 13 and preferably into a corresponding section. de recess inserted in the manufactured by investment casting section of the stator 13.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention relates to a flow machine (10), in particular a radial compressor, comprising a rotor (11) with a rotor blade (12); a stator (13) with, preferably, a guide vane (17), the stator defining at least in sections, the at least one flow channel (14) leading to the rotor blades (12) of the rotor (11) and a flow channel (15) leading away from the rotor blades (12) of the rotor (11); the stator (13) comprising, in the region of at least one flow channel (14, 15) at least one foam-like porous sound damping element (23).

Description

Strömungsmaschine und Verfahren zum Herstellen desselben  Turbomachine and method for producing the same
Die Erfindung betrifft eine Strömungsmaschine, insbesondere eine Radialströmungsmaschine, und ein Verfahren zum Herstellen derselben. The invention relates to a turbomachine, in particular a radial flow machine, and a method for producing the same.
Aus der US 6,669,436 B2 ist eine Strömungsmaschine, nämlich ein Radialverdichter, mit einem Laufschaufeln aufweisenden Rotor und einem Leitschaufeln aufwei- senden Stator bekannt. Die Leitschaufeln des Stators sind dabei als, in Strömungsrichtung des zu verdichtenden Mediums gesehen, den Laufschaufeln des Rotors nachgeordnete Leitschaufeln eines Diffusors ausgebildet. Die Leitschaufeln sind demnach im Bereich eines Strömungskanals positioniert, der von den Laufschaufeln des Rotors wegführen. Aus der US 6,669,436 B2 ist es weiterhin be- kannt, im Bereich des Diffusors, nämlich im Bereich der Leitschaufeln des Diffusors, ein Schalldämpfungselement vorzusehen. Dieses Schalldämpfungselement ist dabei integraler Bestandteil eines Diffusorrings, der als plattenartiger Ring mit mehreren Öffnungen ausgebildet ist, wobei die Öffnungen zu Hohlräumen führen. Das aus der US 6,669,436 B2 bekannte Schalldämpfungselement, welches integraler Bestandteil eines Diffusorrings ist, wirkt dabei als Resonator, der über Hohlräume verfügt, die über Öffnungen mit dem Strömungskanal im Bereich des Diffusors in Verbindung stehen. Die Dämpfungswirkung eines solchen Schalldämpfungselements ist begrenzt. No. 6,669,436 B2 discloses a turbomachine, namely a radial compressor, with a rotor having rotor blades and a stator having stator vanes. The stator vanes of the stator are designed as, in the flow direction of the medium to be compressed, the rotor blades downstream vanes of a diffuser. The guide vanes are thus positioned in the region of a flow channel, which lead away from the rotor blades. It is furthermore known from US Pat. No. 6,669,436 B2 to provide a sound damping element in the region of the diffuser, namely in the region of the guide vanes of the diffuser. This sound attenuation element is an integral part of a diffuser ring, which is designed as a plate-like ring with a plurality of openings, wherein the openings lead to cavities. The sound damping element known from US Pat. No. 6,669,436 B2, which is an integral part of a diffuser ring, acts as a resonator having cavities communicating via openings with the flow channel in the area of the diffuser. The damping effect of such a sound damping element is limited.
Hiervon ausgehend liegt der vorliegenden Erfindung die Aufgabe zugrunde, eine neuartige Strömungsmaschine und Verfahren zum Herstellen derselben zu schaffen. Diese Aufgabe wird durch eine Strömungsmaschine nach Anspruch 1 gelöst. On this basis, the present invention has the object to provide a novel flow machine and method for producing the same. This object is achieved by a turbomachine according to claim 1.
Erfindungsgemäß weist der Stator im Bereich mindestens eines Strömungskanals mindestens ein schaumartiges, poröses Schalldämpfungselement auf. Ein derarti- ges Schalldämpfungselement verfügt über gute Schalldämpfungseigenschaften, des Weiteren kann dasselbe einfach und kostengünstig gefertigt werden. According to the invention, the stator has at least one foam-like, porous sound-damping element in the region of at least one flow channel. Such a The soundproofing element has good soundproofing properties and can be easily and inexpensively manufactured.
Nach einer vorteilhaften Weiterbildung ist das jeweilige schaumartige Schalldämp- fungselement als Metallschaumelement ausgebildet, welches vorzugsweise über ein generatives Fertigungsverfahren hergestellt und individuell als sintermetall- schaumähnliches Element ausgebildet ist. Ein über ein generatives Fertigungsverfahren hergestelltes Metallschaumelement als Schalldämpfungselement ist besonders bevorzugt. According to an advantageous development, the respective foam-type sound damping element is designed as a metal foam element, which is preferably produced by means of a generative production method and designed individually as a sintered metal foam-like element. A produced via a generative manufacturing method metal foam element as a sound attenuation element is particularly preferred.
Vorzugsweise ist die Porosität des jeweiligen schaumartigen Schalldämpfungselements hinsichtlich Porenanzahl und/oder Porentiefe nicht gleichverteilt sondern lokal unterschiedlich. Die Variation der Porosität ist nicht allein abhängig von der Porengröße, sondern auch von der Materialdichte bei konstanter Porengröße. Auch die Variation der Porengröße und Porenform beeinflusst die Porosität. Über die unterschiedliche Verteilung der Porosität des jeweiligen Schalldämpfungselements können die Schalldämpfungseigenschaften sowie Festigkeitseigenschaften optimal eingestellt werden. Preferably, the porosity of the respective foam-type sound-damping element is not uniformly distributed with regard to the number of pores and / or pore depth but varies locally. The variation of the porosity is not only dependent on the pore size, but also on the material density at a constant pore size. The variation of the pore size and pore shape also influences the porosity. About the different distribution of the porosity of the respective sound attenuation element, the sound damping properties and strength properties can be optimally adjusted.
Nach einer vorteilhaften Weiterbildung ist das jeweilige schaumartige Schalldämpfungselement integraler Bestandteil eines Leitschaufeln aufweisenden Diffusors. Vorzugsweise weisen die Leitschaufeln eine Strömungseintrittskante, eine Strömungsaustrittskante und sich zwischen diesen Kanten erstreckende Strömungs- führungsflächen auf, wobei in einem mittleren Bereich zwischen der Strömungs- eintrittskante und der Strömungsaustrittskante eine größere Anzahl an Poren und/oder tiefere Poren ausgebildet ist und/oder sind als in zu der Strömungseintrittskante und der Strömungsaustrittskante angrenzenden Bereichen, und/oder wobei in einem mittleren Bereich zwischen den Strömungsführungsflächen benachbarter Leitschaufeln eine größere Anzahl an Poren und/oder tiefere Poren ausgebildet ist und/oder sind als in zu der jeweiligen Strömungsführungsfläche angrenzenden Bereichen. Hiermit können im Bereich des Diffusors die Schalldämpfungseigenschaften optimal eingestellt werden. According to an advantageous development, the respective foam-like sound damping element is an integral part of a vanes having diffuser. The guide vanes preferably have a flow inlet edge, a flow outlet edge and flow guide surfaces extending between these edges, wherein a larger number of pores and / or deeper pores are and / or are formed in a middle region between the flow inlet edge and the flow outlet edge in regions adjacent to the flow entry edge and the flow exit edge, and / or wherein a larger number of pores and / or deeper pores are formed in a middle region between the flow guide surfaces of adjacent vanes and / or are inward of the respective flow guide surface adjacent areas. This can be optimally adjusted in the area of the diffuser, the sound damping properties.
Nach einer vorteilhaften Weiterbildung der Erfindung sind den jeweiligen Strö- mungskanal begrenzende Wände und/oder im jeweiligen Strömungskanal positionierte Leitschaufeln zumindest abschnittsweise als schaumartiges, poröses Schalldämpfungselement ausgeführt. Dies erlaubt eine optimale Einstellung von Schalldämpfungseigenschaften im Bereich eines statorseitigen Strömungskanals einer Strömungsmaschine. According to an advantageous development of the invention, walls bounding the respective flow channel and / or guide vanes positioned in the respective flow channel are designed, at least in sections, as a foam-like, porous sound damping element. This allows optimal adjustment of sound damping properties in the region of a stator-side flow channel of a turbomachine.
Das Verfahren zum Herstellen der erfindungsgemäßen Strömungsmaschine ist in Anspruch 10 definiert. The method for producing the turbomachine according to the invention is defined in claim 10.
Bevorzugte Weiterbildungen der Erfindung ergeben sich aus den Unteransprü- chen und der nachfolgenden Beschreibung. Ausführungsbeispiele der Erfindung werden, ohne hierauf beschränkt zu sein, an Hand der Zeichnung näher erläutert. Dabei zeigt: Preferred developments of the invention emerge from the subclaims and the following description. Embodiments of the invention will be described, without being limited thereto, with reference to the drawings. Showing:
Fig. 1 einen Axialschnitt durch eine als Radialverdichter ausgebildete Strö- mungsmaschine; 1 shows an axial section through a flow machine designed as a radial compressor;
Fig. 2 einen Blick in Richtung II der Fig. 1 auf einen Diffusor des Radialverdichters der Fig. 1 ; FIG. 2 shows a view in the direction II of FIG. 1 of a diffuser of the radial compressor of FIG. 1; FIG.
Fig. 3 einen Blick in Richtung II der Fig. 1 auf einen alternativen Diffusor des Fig. 3 is a view in the direction II of Fig. 1 to an alternative diffuser of
Radialverdichters der Fig. 1 ; Fig. 4 einen Blick in Richtung II der Fig. 1 auf einen weiteren alternativen Diffusor des Radialverdichters der Fig. 1 ; und  Radial compressor of Fig. 1; FIG. 4 shows a view in the direction II of FIG. 1 of a further alternative diffuser of the radial compressor of FIG. 1; FIG. and
Fig. 5 einen Axialschnitt durch eine weitere als Radialverdichter ausgebildete Fig. 5 is an axial section through another designed as a radial compressor
Strömungsmaschine. Die Erfindung betrifft eine Strömungsmaschine, insbesondere eine Radialströmungsmaschine. Ferner betrifft die Erfindung ein Verfahren zum Herstellen einer solchen Strömungsmaschine. Flow machine. The invention relates to a turbomachine, in particular a radial flow machine. Furthermore, the invention relates to a method for producing such a turbomachine.
Fig. 1 und 2 zeigen unterschiedliche Ansichten einer als Radialverdichter ausgebildeten Strömungsmaschine 10. FIGS. 1 and 2 show different views of a turbomachine 10 designed as a radial compressor.
Die als Radialverdichter ausgebildete Strömungsmaschine 10 der Fig. 1 und 2 verfügt über einen Rotor 1 1 mit Laufschaufeln 12. Ferner verfügt die als Radialver- dichter ausgebildete Strömungsmaschine 10 über einen Stator 13, wobei der Stator 13 einerseits einen zu den Laufschaufeln 12 des Rotors 1 1 hinführenden, sich in Axialrichtung erstreckenden Strömungskanal 14 und andererseits einen sich in Radialrichtung erstreckenden, von den Laufschaufeln 12 des Rotors 1 1 wegführenden Strömungskanal 15 zumindest abschnittsweise begrenzt. Furthermore, the turbomachine 10 designed as a radial compressor 10 has a stator 13, wherein the stator 13 on the one hand to the rotor blades 1 of the rotor. 1 1 leading, extending in the axial direction of the flow channel 14 and on the other hand, a radially extending, of the blades 12 of the rotor 1 1 leading away flow channel 15 at least partially limited.
Bestandteil des Stators 13 ist ein Diffusor 1 6, der über Leitschaufeln 17 verfügt. Die Leitschaufeln 17 des Diffusors 1 6 sind in Strömungsrichtung des zu verdichtenden Mediums gesehen, stromabwärts der Laufschaufeln 12 des Rotors 1 1 in dem sich in Radialrichtung erstreckenden Strömungskanal 15 positioniert. Strom- abwärts des Diffusors 1 6 schließt sich ein spiralförmiges Abströmgehäuse 18 des Stators 13 an. Die Strömungsrichtung des zu verdichtenden Mediums ist in Fig. 1 durch Pfeile 19 visualisiert. Part of the stator 13 is a diffuser 1 6, which has guide vanes 17. The guide vanes 17 of the diffuser 1 6 are seen in the flow direction of the medium to be compressed, downstream of the blades 12 of the rotor 1 1 positioned in the radially extending flow channel 15. Downstream of the diffuser 1 6 is followed by a spiral discharge housing 18 of the stator 13 at. The flow direction of the medium to be compressed is visualized in FIG. 1 by arrows 19.
Fig. 2 zeigt einen Blick II auf den Diffusor 1 6, nämlich auf die Leitschaufeln 17 des Diffusors 16 und auf eine Wand 24 desselben. Jede der Leitschaufeln 17 verfügt über eine Strömungseintrittskante 20, eine Strömungsaustrittskante 21 sowie über sich zwischen der jeweiligen Strömungseintrittskante 20 und der Strömungsaustrittskante 21 erstreckende Strömungsführungsflächen 22. Bei der erfindungsgemäßen Strömungsmaschine weist der Stator 13 im Bereich mindestens eines Strömungskanals 14 und/oder 15 ein schaumartiges, poröses Schalldämpfungselement 23 auf. FIG. 2 shows a view II of the diffuser 16, namely the guide vanes 17 of the diffuser 16 and a wall 24 thereof. Each of the guide vanes 17 has a flow inlet edge 20, a flow outlet edge 21 and flow guide surfaces 22 extending between the respective flow inlet edge 20 and the flow outlet edge 21. In the turbomachine according to the invention, the stator 13 in the region of at least one flow channel 14 and / or 15 on a foam-like, porous sound damping element 23.
Das jeweilige schaumartige, poröse Schalldämpfungselement 23 kann dabei als Metallschaumelement, insbesondere als sintermetallähnliches Element, oder als Kunststoffschaumelement ausgebildet sein. Im Falle eines Metallschaumelements ist dasselbe vorzugsweise über ein generatives Fertigungsverfahren hergestellt. The respective foam-like, porous sound damping element 23 may be formed as a metal foam element, in particular as a sintered metal-like element, or as a plastic foam element. In the case of a metal foam element, the same is preferably produced via a generative manufacturing method.
Im Ausführungsbeispiel der Fig. 1 und 2, in welchem der Stator 13 im Bereich des Diffusors 1 6 das oder jedes schaumartige, poröse Schalldämpfungselement 23 aufweist, ist vorgesehen, dass Wände 24 des Stators 13, die den von den Leitschaufeln 12 des Rotors 1 1 wegführenden Strömungskanal 15 im Bereich des Diffusors 16 abschnittsweise begrenzen, zumindest abschnittsweise als schaumarti- ges, poröses Schalldämpfungselement 23 ausgeführt sind, und zwar vorzugsweise an beiden axialen Seiten oder auch nur an einer axialen Seite des sich in Radialrichtung erstreckenden, von den Laufschaufeln 12 des Rotors 1 1 wegführenden Strömungskanals 15 des Stators 13 im Bereich des Diffusors 1 6. Dies erlaubt eine besonders effektive Schalldämpfung. Druckstöße, die vom Rotor 1 1 ausgehen und auf den Diffusor 1 6 wirken, können direkt an der Quelle gedämpft werden. In the embodiment of FIGS. 1 and 2, in which the stator 13 in the region of the diffuser 1 6, the or each foam-like, porous sound attenuation element 23, it is provided that walls 24 of the stator 13, that of the vanes 12 of the rotor 1 1 leading away flow channel 15 in the region of the diffuser 16 sections, at least partially designed as foamy ge, porous sound attenuation element 23, preferably on both axial sides or even on one axial side of extending in the radial direction of the blades 12 of the rotor 1 1 wegführenden flow channel 15 of the stator 13 in the region of the diffuser 1 6. This allows a particularly effective sound attenuation. Pressure surges, starting from the rotor 1 1 and acting on the diffuser 1 6 can be attenuated directly at the source.
Im in Fig. 1 und 2 gezeigten Ausführungsbeispiel ist die Porosität des jeweiligen schaumartigen Schalldämpfungselements gleichverteilt, das heißt, das schaumartige Schalldämpfungselement 23 weist hinsichtlich Anzahl und Tiefe sowie Größe der Poren eine Gleichverteilung auf. In the embodiment shown in FIGS. 1 and 2, the porosity of the respective foam-type sound damping element is distributed uniformly, that is, the foam-like sound damping element 23 has an equal distribution in terms of number and depth and size of the pores.
Demgegenüber zeigen Fig. 3 und 4 Varianten der Erfindung, bei welcher das jeweilige schaumartige Schalldämpfungselement 23 hinsichtlich Porenanzahl und Porentiefe eine nicht gleichverteilte Porosität, sondern vielmehr eine lokal unter- schiedliche Porosität aufweist. So sind auch in Fig. 3 und 4 die sich in Radialrichtung erstreckenden Wände 24, die den sich in Radialrichtung erstreckenden Strö- mungskanal 15 im Bereich des Diffusors 1 6 abschnittsweise begrenzen, abschnittsweise als schaumartiges, poröses Schalldämpfungselement 23 ausgeführt. In contrast, FIGS. 3 and 4 show variants of the invention in which the respective foam-type sound damping element 23 has a not uniformly distributed porosity with regard to the number of pores and pore depth, but rather a locally different porosity. Thus, in FIGS. 3 and 4, the radially extending walls 24 which define the radially extending streams are also shown in FIG. Narrowing channel 15 in the region of the diffuser 1 6 sections limit, partially executed as a foam-like, porous sound attenuation element 23.
In Fig. 3 ist in einem mittleren Bereich zwischen der Strömungseintrittskante 20 und der Strömungsaustrittskante 21 eine größere Anzahl an Poren und eine größere Tiefe der Poren vorgesehen bzw. ausgebildet als in unmittelbar zu der Strömungseintrittskante 20 und der Strömungsaustrittskante 21 angrenzenden Bereichen. In FIG. 3, a larger number of pores and a greater depth of the pores are provided or formed in a middle region between the flow inlet edge 20 and the flow outlet edge 21 than in regions directly adjoining the flow inlet edge 20 and the flow outlet edge 21.
In der Variante der Fig. 4 ist die Porosität der den sich in Radialrichtung erstreckenden Strömungskanal 15 begrenzenden Wände 24 des Rotors 13 im Bereich des Diffusors 1 6 zusätzlich derart lokal unterschiedlich, dass in einem mittleren Bereich zwischen den Strömungsführungsflächen 22 benachbarter Leitschaufeln 17 des Diffusors 16 eine größere Anzahl an Poren und tiefere Poren ausgebildet ist bzw. sind als unmittelbar benachbart zu der jeweiligen strömungsführenden Fläche 23 der jeweiligen Leitschaufel 17. In the variant of FIG. 4, the porosity of the walls 24 of the rotor 13 bordering in the radial direction in the region of the diffuser 16 is additionally locally so different that in a central region between the flow guide surfaces 22 of adjacent guide vanes 17 of the diffuser 16 a larger number of pores and deeper pores is or are formed as immediately adjacent to the respective flow-guiding surface 23 of the respective vane 17th
Fig. 5 zeigt eine Variante der Erfindung, in welcher die den sich in Radialrichtung erstreckenden Strömungskanal 15 im Bereich des Diffusors 1 6 begrenzenden Wände 24 des Stators 13 über ihre axiale Dicke gesehen eine lokal unterschiedliche Porosität aufweisen. So ist in Fig. 5 vorgesehen, dass in einem axial mittleren Bereich dieser Wände 24 größere Poren ausgebildet sind als unmittelbar angrenzend an den Strömungskanal 15. 5 shows a variant of the invention in which the walls 24 of the stator 13, which delimit the radially extending flow channel 15 in the region of the diffuser 16, have a locally different porosity, viewed over their axial thickness. Thus, it is provided in FIG. 5 that larger pores are formed in an axially middle region of these walls 24 than directly adjacent to the flow channel 15.
Obwohl es bevorzugt ist, dass den jeweiligen Strömungskanal 14, 15 begrenzende Wände 24 zumindest abschnittsweise als schaumartige, poröse Schalldämpfungselemente 13 ausgeführt sind, ist es alternativ oder zusätzlich auch möglich, dass im jeweiligen Strömungskanal 14, 15 positionierte Leitschaufeln 17 zumindest abschnittsweise als schaumartige, poröse Schalldämpfungselemente 13 aus- geführt sind. In den gezeigten Ausführungsbeispielen weist der Stator 13 im Bereich des von den Laufschaufeln 12 des Rotors 1 1 wegführenden Strömungskanals 15 mindestens ein schaumartiges, poröses Schalldämpfungselement 23 auf. Although it is preferred that the respective flow channel 14, 15 bounding walls 24 are at least partially designed as foam-like, porous sound attenuation elements 13, it is alternatively or additionally also possible that in the respective flow channel 14, 15 positioned guide vanes 17 at least partially as a foam-like, porous Sound attenuation elements 13 are executed. In the exemplary embodiments shown, the stator 13 has at least one foam-like, porous sound-damping element 23 in the area of the flow channel 15 leading away from the rotor blades 12 of the rotor 11.
Es ist alternativ oder zusätzlich auch möglich, dass der Stator 13 im Bereich des zu den Laufschaufeln 12 des Rotors 1 1 hinführenden Strömungskanals 14 mindestens ein solches schaumartiges, poröses Schalldämpfungselement 23 aufweist. As an alternative or in addition, it is also possible for the stator 13 to have at least one such foam-like, porous sound-damping element 23 in the region of the flow channel 14 leading to the rotor blades 12 of the rotor 11.
In den gezeigten Ausführungsbeispielen ist die Strömungsmaschine 10 als Radialverdichter ausgeführt. Es ist auch möglich, dass die Erfindung bei einer als Radialturbine ausgebildeten Radialströmungsmaschine zum Einsatz kommt. Bei einer Radialturbine verläuft ein zu den Laufschaufeln des Rotors hinführenden Strömungskanal in Radialrichtung und ein von den Laufschaufeln des Rotors wegführender Strömungskanal in Axialrichtung. In the exemplary embodiments shown, the turbomachine 10 is designed as a radial compressor. It is also possible for the invention to be used in a radial flow turbine designed as a radial turbine. In a radial turbine, a flow channel leading to the blades of the rotor extends in the radial direction and a flow channel leading away from the rotor blades in the axial direction.
Alternativ möglich sind allerdings auch Strömungsmaschinen, die eine radiale und/oder axiale Bauart miteinander kombinieren. Alternatively possible, however, are turbomachines which combine a radial and / or axial design.
Das jeweilige schaumartige, poröse Schalldämpfungselement 23 erzeugt eine viskose Schalldämpfung. Schall kann so effektiver als üblichen Resonator- Schalldämpfern gedämpft werden. Insbesondere können auch hochfrequente Schwingungsanregungen des Rotors und dem Rotor nachgelagerter Baugruppen reduziert werden. Es fällt auch weniger Druckverlust in der Strömung als bei Re- sonator-Schalldämpfern an. The respective foam-like, porous sound-damping element 23 produces a viscous sound attenuation. Sound can be damped more effectively than conventional resonator silencers. In particular, high-frequency vibration excitations of the rotor and the rotor of downstream assemblies can be reduced. There is also less pressure loss in the flow than in the case of resonator silencers.
Die Erfindung betrifft auch ein Verfahren zum Herstellen einer Strömungsmaschine, hierzu werden der Rotor 1 1 und der Stator 13 bereitgestellt. Beim Rotor 1 1 kann es sich um ein Feingussbauteil, spanend bearbeitete The invention also relates to a method for producing a turbomachine, for this purpose, the rotor 1 1 and the stator 13 are provided. The rotor 1 1 may be a precision casting, machined
Schmiedebauteil oder spanend bearbeitetes integral gefertigtes Bauteil handeln. Forging component or machined integrally manufactured component act.
Ferner kann es sich beim Stator 13 zumindest abschnittsweise um ein Feinguss- bauteil handeln. Furthermore, the stator 13 may at least partially be a precision casting component.
Der Stator 13 wird zumindest abschnittsweise, nämlich im Bereich des oder jedes schaumartigen, porösen Schalldämpfungselements 23, über ein generatives Fertigungsverfahren hergestellt. The stator 13 is produced at least in sections, namely in the area of the or each foam-like, porous sound damping element 23, via a generative manufacturing process.
Dann, wenn das jeweilige schaumartige Schalldämpfungselement 23 als Metallschaumelement ausgebildet ist, kann insbesondere ein additives Fertigungsverfahren wie z.B. (selektives) Laserstrahlschmelzen oder Elektronenstrahlschweißen genutzt werden. In diesem Fall ist der Metallschaum dann ein sintermetallähnli- eher, generierter Metallschaum. Then, when the respective foam-type sound-damping element 23 is formed as a metal foam element, in particular an additive manufacturing process such as. (Selective) laser beam melting or electron beam welding can be used. In this case, the metal foam is then a sintered metal-like, generated metal foam.
Dann, wenn der Diffusor 1 6 mindestens ein schaumartiges, poröses Schalldämpfungselement 23 aufweist, ist vorzugsweise ein sogenannter Diffusorring des Diffusors 16, der zumindest einen Abschnitt einer der Wände 24 des statorseitigen Diffusors 16 und integral auch die Leitschaufeln 17 desselben bereitstellt, über ein generatives Fertigungsverfahren hergestellt. In diesem Fall ist das jeweilige Schalldämpfungselement 23 integraler Bestandteil des Diffusorrings und damit des Diffusors 1 6. Der Diffusorring stellt die Leitschaufeln 17 des Diffusors 16 und zumindest abschnittsweise eine der Wände 24 bereit, die den sich in Radialrich- tung erstreckenden Strömungskanal 15 begrenzen. Then, when the diffuser 16 has at least one foam-like porous sound attenuation element 23, preferably a so-called diffuser ring of the diffuser 16 which provides at least a portion of one of the walls 24 of the stator diffuser 16 and integrally also the vanes 17 thereof via a generative manufacturing process manufactured. In this case, the respective sound damping element 23 is an integral part of the diffuser ring and thus of the diffuser 1 6. The diffuser ring provides the vanes 17 of the diffuser 16 and, at least in sections, one of the walls 24 delimiting the flow channel 15 extending in the radial direction.
Derjenige Abschnitt des Stators 13, der ein schaumartiges, poröses Schalldämpfungselement 23 umfasst und über ein generatives Fertigungsverfahren hergestellt ist, wird mit einem angrenzenden, vorzugsweise durch Feingießen hergestellten Abschnitt des Stators 13 verbunden und hierzu vorzugweise in eine entsprechen- de Ausnehmung im durch Feingießen hergestellten Abschnitt des Stators 13 eingesetzt. The section of the stator 13 which comprises a foam-like, porous sound-deadening element 23 and is produced by a generative manufacturing method is connected to an adjacent, preferably investment-cast, section of the stator 13 and preferably into a corresponding section. de recess inserted in the manufactured by investment casting section of the stator 13.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
10 Strömungsmaschine 10 turbomachine
1 1 Rotor  1 1 rotor
12 Laufschaufel  12 blades
13 Stator  13 stator
14 Strömungskanal  14 flow channel
15 Strömungskanal  15 flow channel
16 Diffusor  16 diffuser
17 Leitschaufel  17 vane
18 Abströmgehäuse  18 outflow housing
19 Strömungsrichtung  19 flow direction
20 Strömungseintrittskante  20 flow inlet edge
21 Strömungsaustrittskante  21 flow outlet edge
22 Strömungsführungsfläche  22 flow guide surface
23 Schalldämpfungselement  23 sound attenuation element
24 Wand  24 wall

Claims

Ansprüche claims
Strömungsmaschine (10), insbesondere Radialverdichter, mit Turbomachine (10), in particular centrifugal compressor, with
einem Laufschaufeln (12) aufweisenden Rotor (1 1 );  a rotor blades (1 1) having rotor blades (12);
einem vorzugsweise Leitschaufeln (17) aufweisenden Stator (13), der mindestens einen zu den Laufschaufeln (12) des Rotors (1 1 ) hinführenden Strömungskanal (14) und einen von den Laufschaufeln (12) des Rotors (1 1 ) wegführenden Strömungskanal (15) zumindest abschnittsweise begrenzt;  a stator (13), preferably comprising guide vanes (17), which has at least one flow channel (14) leading to the rotor blades (1) and a flow channel (15) leading away from the rotor blades (12) of the rotor (11) ) at least partially limited;
dadurch gekennzeichnet, dass  characterized in that
der Stator (13) im Bereich mindestens eines Strömungskanals (14, 15) mindestens ein schaumartiges, poröses Schalldämpfungselement (23) aufweist.  the stator (13) in the region of at least one flow channel (14, 15) has at least one foam-like, porous sound damping element (23).
Strömungsmaschine nach Anspruch 1 , dadurch gekennzeichnet, dass das jeweilige schaumartige Schalldämpfungselement (23) als Metallschaumelement, insbesondere als sintermetallschaumähnliches Element, oder als Kunststoffschaumelement ausgebildet ist. Turbomachine according to claim 1, characterized in that the respective foam-like sound-damping element (23) is designed as a metal foam element, in particular as a sintered metal foam-like element, or as a plastic foam element.
Strömungsmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das jeweilige schaumartige Schalldämpfungselement (23) über ein generatives Fertigungsverfahren hergestellt ist. Turbomachine according to claim 1 or 2, characterized in that the respective foam-like sound damping element (23) is produced via a generative manufacturing process.
Strömungsmaschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Porosität des jeweiligen schaumartigen Schalldämpfungselements (23) derart gleichverteilt ist, dass Porenanzahl und Porentiefe lokal gleichförmig ist. Strömungsmaschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Porosität des jeweiligen schaumartigen Schalldämpfungselements (23) hinsichtlich Porenanzahl und/oder Porentiefe nicht gleichverteilt sondern lokal unterschiedlich ist. Turbomachine according to one of claims 1 to 3, characterized in that the porosity of the respective foam-like sound damping element (23) is distributed so uniformly that the number of pores and pore depth is locally uniform. Turbomachine according to one of claims 1 to 3, characterized in that the porosity of the respective foam-like sound damping element (23) is not uniformly distributed in terms of pore number and / or pore depth but locally different.
Strömungsmaschine nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das jeweilige schaumartige Schalldämpfungselement (23) Bestandteil eines Leitschaufeln (17) aufweisenden statorseitigen Diffusors (1 6) ist und/oder einlaufseitigen Strömungsbereichs ist. Turbomachine according to one of claims 1 to 5, characterized in that the respective foam-like sound damping element (23) is part of a stator vanes (17) having stator-side diffuser (1 6) and / or inlet-side flow region.
Strömungsmaschine nach Anspruch 5 und 6, dadurch gekennzeichnet, dass die Leitschaufeln (17) eine Strömungseintrittskante (20), eine Strömungsaustrittskante (21 ) und sich zwischen diesen Kanten (20, 21 ) erstreckende Strömungsführungsflächen (22) aufweisen, wobei in einem mittleren Bereich zwischen der Strömungseintrittskante (20) und der Strömungsaustrittskante (21 ) eine größere Anzahl an Poren und/oder tiefere Poren, und/oder variierender Porengröße und/oder variierender Porendichte und/oder Porenform ausgebildet ist und/oder sind als in zu der Strömungseintrittskante (20) und der Strömungsaustrittskante (21 ) angrenzenden Bereichen. Turbomachine according to claim 5 and 6, characterized in that the guide vanes (17) have a flow inlet edge (20), a flow outlet edge (21) and between these edges (20, 21) extending flow guide surfaces (22), wherein in a central region between the flow inlet edge (20) and the flow outlet edge (21) is formed a larger number of pores and / or deeper pores, and / or varying pore size and / or pore density and / or pore shape and / or are as in to the flow inlet edge (20) and the flow exit edge (21) adjacent areas.
Strömungsmaschine nach Anspruch 5 und 6 oder nach Anspruch 7, dadurch gekennzeichnet, dass die Leitschaufeln (17) eine Strömungseintrittskante (20), eine Strömungsaustrittskante (21 ) und sich zwischen diesen Kanten (20, 21 ) erstreckende Strömungsführungsflächen (22) aufweisen, wobei in einem mittleren Bereich zwischen den Strömungsführungsflächen (22) benachbarter Leitschaufeln (17) eine größere Anzahl an Poren und/oder tiefere Poren ausgebildet ist und/oder sind als in zur der jeweiligen Strömungsfüh- rungsfläche (22) angrenzenden Bereichen. Strömungsmaschine nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass den jeweiligen Strömungskanal (14, 15) begrenzende Wände (24) und/oder im jeweiligen Strömungskanal (14, 15) positionierte Leitschaufeln (17) zumindest abschnittsweise als schaumartiges, poröses Schalldämpfungselement (13) ausgeführt sind. Turbomachine according to claim 5 and 6 or according to claim 7, characterized in that the guide vanes (17) have a flow inlet edge (20), a flow outlet edge (21) and between these edges (20, 21) extending flow guide surfaces (22), wherein a larger number of pores and / or deeper pores is formed in a middle region between the flow guide surfaces (22) of adjacent guide vanes (17) and / or are in regions adjacent to the respective flow guide surface (22). Turbomachine according to one of claims 1 to 8, characterized in that the respective flow channel (14, 15) delimiting walls (24) and / or in the respective flow channel (14, 15) positioned guide vanes (17) at least partially as a foam-like, porous sound attenuation element ( 13) are executed.
Verfahren zum Herstellen einer Strömungsmaschine (10) nach einem der Ansprüche 1 bis 9, mit folgenden Method for producing a turbomachine (10) according to one of claims 1 to 9, with the following
Bereitstellen des Rotors (1 1 );  Providing the rotor (1 1);
Bereitstellen des Stators (13);  Providing the stator (13);
dadurch gekennzeichnet, dass  characterized in that
der Stator (13) zumindest abschnittsweise, nämlich im Bereich eines mindestens ein schaumartiges, poröses Schalldämpfungselement (23) aufweisenden Abschnitts, über ein generatives Fertigungsverfahren hergestellt wird.  the stator (13) is produced at least in sections, namely in the region of a section having at least one foam-like, porous sound damping element (23), via a generative manufacturing method.
Verfahren nach Anspruch 10, dadurch gekennzeichnet, dass ein erster Abschnitt des Stators (13) durch Feingeißen und/oder spanend bearbeitetes Schmiedebauteil und/oder spanend bearbeitetes integral gefertigtes Bauteil hergestellt wird, und dass mindestens ein zweiter Abschnitt des Stators (13), der mindestens ein schaumartiges, poröses Schalldämpfungselements (23) umfasst und über ein generatives Fertigungsverfahren hergestellt wird, in eine entsprechende Ausnehmung im ersten Abschnitt eingesetzt wird. A method according to claim 10, characterized in that a first portion of the stator (13) by fines and / or machined forged component and / or machined integrally manufactured component is produced, and that at least a second portion of the stator (13), the at least comprises a foam-like, porous sound-damping element (23) and is produced by a generative manufacturing process, is inserted into a corresponding recess in the first section.
EP17702102.9A 2016-07-20 2017-01-31 Flow machine and method for the production thereof Withdrawn EP3488092A1 (en)

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DE102016213296.2A DE102016213296A1 (en) 2016-07-20 2016-07-20 Turbomachine and method for producing the same
PCT/EP2017/051976 WO2018015027A1 (en) 2016-07-20 2017-01-31 Flow machine and method for the production thereof

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US20190178262A1 (en) 2019-06-13
WO2018015027A1 (en) 2018-01-25

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