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EP3611387A3 - Schaufelrad einer strömungsmaschine - Google Patents

Schaufelrad einer strömungsmaschine Download PDF

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Publication number
EP3611387A3
EP3611387A3 EP19190987.8A EP19190987A EP3611387A3 EP 3611387 A3 EP3611387 A3 EP 3611387A3 EP 19190987 A EP19190987 A EP 19190987A EP 3611387 A3 EP3611387 A3 EP 3611387A3
Authority
EP
European Patent Office
Prior art keywords
sub
blades
turbomachine
blade
angle
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.)
Granted
Application number
EP19190987.8A
Other languages
English (en)
French (fr)
Other versions
EP3611387A2 (de
EP3611387B1 (de
Inventor
Sven SCHRAPE
Bernhard Mueck
Jens Nipkau
Thomas Giersch
Frank Heinichen
John Dodds
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.)
Rolls Royce Deutschland Ltd and Co KG
Rolls Royce PLC
Original Assignee
Rolls Royce Deutschland Ltd and Co KG
Rolls Royce PLC
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 Rolls Royce Deutschland Ltd and Co KG, Rolls Royce PLC filed Critical Rolls Royce Deutschland Ltd and Co KG
Priority to EP21195914.3A priority Critical patent/EP3940200B1/de
Publication of EP3611387A2 publication Critical patent/EP3611387A2/de
Publication of EP3611387A3 publication Critical patent/EP3611387A3/de
Application granted granted Critical
Publication of EP3611387B1 publication Critical patent/EP3611387B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/321—Rotors specially for elastic fluids for axial flow pumps for axial flow compressors
    • F04D29/324—Blades
    • 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
    • F01D9/00—Stators
    • F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
    • F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
    • F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
    • 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
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • F01D17/16—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes
    • F01D17/162—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes for axial flow, i.e. the vanes turning around axes which are essentially perpendicular to the rotor centre line
    • 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
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F01D5/141—Shape, i.e. outer, aerodynamic form
    • 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
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F01D5/16—Form or construction for counteracting blade vibration
    • 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
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/542—Bladed diffusers
    • F04D29/544—Blade shapes
    • 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
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/56—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/563—Fluid-guiding means, e.g. diffusers adjustable specially 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
    • F04D29/66—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
    • F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
    • 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
    • F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
    • 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
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • F01D17/16—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes
    • 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
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • F01D17/16—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes
    • F01D17/167—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes of vanes moving in translation
    • 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
    • F05D2240/00—Components
    • F05D2240/10—Stators
    • 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
    • F05D2240/00—Components
    • F05D2240/10—Stators
    • F05D2240/12—Fluid guiding means, e.g. vanes
    • F05D2240/125—Fluid guiding means, e.g. vanes related to the tip of a stator vane
    • 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
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/24—Rotors for turbines
    • 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
    • F05D2250/30—Arrangement of components
    • F05D2250/38—Arrangement of components angled, e.g. sweep angle
    • 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
    • F05D2250/70—Shape
    • F05D2250/73—Shape asymmetric
    • 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
    • F05D2250/90—Variable geometry
    • 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
    • F05D2260/70—Adjusting of angle of incidence or attack of rotating blades
    • 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
    • F05D2260/961—Preventing, counteracting or reducing vibration or noise by mistuning rotor blades or stator vanes with irregular interblade spacing, airfoil shape
    • 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
    • F05D2270/00—Control
    • F05D2270/01—Purpose of the control system
    • F05D2270/10—Purpose of the control system to cope with, or avoid, compressor flow instabilities
    • F05D2270/101—Compressor surge or stall

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Geometry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

Die Erfindung betrifft ein Schaufelrad einer Strömungsmaschine, das eine Mehrzahl von Schaufeln (51-54, 61-64, 71-74) aufweist, die dafür geeignet und vorgesehen sind, sich in einem Strömungspfad (8) der Strömungsmaschine radial zu erstrecken, wobei die Schaufeln (51-54, 61-64, 71-74) einen Schaufeleintrittswinkel (γ<sub>1</sub>) und einen Schaufelaustrittswinkel (γ<sub>2</sub>) ausbilden. Es ist vorgesehen, dass das Schaufelrad N Blöcke (B1, B2; B<sub>j</sub>, B<sub>k</sub>) von Schaufeln mit N ≥ 2 ausbildet, wobei die Schaufeln (51-54, 61-64, 71-74) eines Blocks (B1, B2; B<sub>j</sub>, B<sub>k</sub>) jeweils den gleichen Schaufeleintrittswinkel (γ<sub>1</sub>) und den gleichen Schaufelaustrittswinkel (γ<sub>2</sub>) aufweisen, und die Schaufeln (51-54, 61-64, 71-74) von mindestens zwei aneinandergrenzender Blöcken (B1, B2; B<sub>j</sub>, B<sub>k</sub>) einen unterschiedlichen Schaufeleintrittswinkel (γ<sub>1</sub>) und/oder einen unterschiedlichen Schaufelaustrittswinkel (γ<sub>2</sub>) aufweisen. Gemäß einem weiteren Erfindungsaspekt werden Teilspalte (81, 811-816, 82), die die Schaufeln zu einer angrenzenden Strömungspfadberandung (410, 950) ausbilden, in aneinandergrenzenden Blöcken (Bj, Bk) variiert.
EP19190987.8A 2018-08-14 2019-08-09 Schaufelrad einer strömungsmaschine Active EP3611387B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21195914.3A EP3940200B1 (de) 2018-08-14 2019-08-09 Schaufelrad einer strömungsmaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018119704.7A DE102018119704A1 (de) 2018-08-14 2018-08-14 Schaufelrad einer Strömungsmaschine

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP21195914.3A Division EP3940200B1 (de) 2018-08-14 2019-08-09 Schaufelrad einer strömungsmaschine

Publications (3)

Publication Number Publication Date
EP3611387A2 EP3611387A2 (de) 2020-02-19
EP3611387A3 true EP3611387A3 (de) 2020-05-06
EP3611387B1 EP3611387B1 (de) 2021-10-06

Family

ID=67587616

Family Applications (2)

Application Number Title Priority Date Filing Date
EP19190987.8A Active EP3611387B1 (de) 2018-08-14 2019-08-09 Schaufelrad einer strömungsmaschine
EP21195914.3A Active EP3940200B1 (de) 2018-08-14 2019-08-09 Schaufelrad einer strömungsmaschine

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP21195914.3A Active EP3940200B1 (de) 2018-08-14 2019-08-09 Schaufelrad einer strömungsmaschine

Country Status (3)

Country Link
US (2) US11105207B2 (de)
EP (2) EP3611387B1 (de)
DE (1) DE102018119704A1 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3094746B1 (fr) * 2019-04-03 2021-03-05 Safran Aircraft Engines Aube de stator a calage variable pour une turbomachine d’aeronef
JP7363328B2 (ja) * 2019-10-09 2023-10-18 ニデック株式会社 インペラおよび軸流ファン
IT202000004585A1 (it) * 2020-03-04 2021-09-04 Nuovo Pignone Tecnologie Srl Turbina e pala perfezionate per la protezione della radice dai gas caldi del percorso del flusso.
CN113685363B (zh) * 2020-05-18 2024-07-05 中国航发商用航空发动机有限责任公司 多级轴流压气机叶片设计方法
US12091178B2 (en) 2022-05-30 2024-09-17 Pratt & Whitney Canada Corp. Aircraft engine with stator having varying geometry
US11939886B2 (en) 2022-05-30 2024-03-26 Pratt & Whitney Canada Corp. Aircraft engine having stator vanes made of different materials
US12017782B2 (en) 2022-05-30 2024-06-25 Pratt & Whitney Canada Corp. Aircraft engine with stator having varying pitch
US12078189B2 (en) 2022-08-09 2024-09-03 Pratt & Whitney Canada Corp. Variable vane airfoil with recess to accommodate protuberance
FR3144634A1 (fr) * 2023-01-04 2024-07-05 Safran Aircraft Engines aubage amélioré pour compresseur de turbomachine.

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3536417A (en) * 1965-09-22 1970-10-27 Daimler Benz Ag Impeller for axial or radial flow compressors
US6379112B1 (en) * 2000-11-04 2002-04-30 United Technologies Corporation Quadrant rotor mistuning for decreasing vibration
US20040175260A1 (en) * 2001-05-11 2004-09-09 Marc Berthillier Structure comprising a rotor and fixed perturbation sources and method for reducing vibrations in said structure
US20110158793A1 (en) * 2009-12-28 2011-06-30 Fritsch Theodore J Vane assembly having a vane end seal
US20140286758A1 (en) * 2013-03-19 2014-09-25 Abb Turbo Systems Ag Nozzle ring with non-uniformly distributed airfoils and uniform throat area
DE102013224081A1 (de) * 2013-11-26 2015-06-11 Man Diesel & Turbo Se Verdichter
US20150285085A1 (en) * 2014-04-02 2015-10-08 Solar Turbines Incorporated Variable guide vane extended variable fillet
DE102016212767A1 (de) * 2016-07-13 2018-01-18 MTU Aero Engines AG Verstellbares Turbomaschinen-Schaufelgitter

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2623793B1 (de) * 2012-02-02 2016-08-10 MTU Aero Engines GmbH Strömungsmaschine mit Schaufelgitter
JP2013177816A (ja) * 2012-02-28 2013-09-09 Hitachi Ltd 軸流ターボ機械
DE102014203605A1 (de) * 2014-02-27 2015-08-27 Rolls-Royce Deutschland Ltd & Co Kg Schaufelreihengruppe
US10526905B2 (en) * 2017-03-29 2020-01-07 United Technologies Corporation Asymmetric vane assembly
GB201719538D0 (en) * 2017-11-24 2018-01-10 Rolls Royce Plc Gas turbine engine
US10436035B1 (en) * 2018-07-03 2019-10-08 Rolls-Royce Plc Fan design
DE102018117884A1 (de) * 2018-07-24 2020-01-30 Rolls-Royce Deutschland Ltd & Co Kg Strukturbaugruppe für einen Verdichter einer Strömungsmaschine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3536417A (en) * 1965-09-22 1970-10-27 Daimler Benz Ag Impeller for axial or radial flow compressors
US6379112B1 (en) * 2000-11-04 2002-04-30 United Technologies Corporation Quadrant rotor mistuning for decreasing vibration
US20040175260A1 (en) * 2001-05-11 2004-09-09 Marc Berthillier Structure comprising a rotor and fixed perturbation sources and method for reducing vibrations in said structure
US20110158793A1 (en) * 2009-12-28 2011-06-30 Fritsch Theodore J Vane assembly having a vane end seal
US20140286758A1 (en) * 2013-03-19 2014-09-25 Abb Turbo Systems Ag Nozzle ring with non-uniformly distributed airfoils and uniform throat area
DE102013224081A1 (de) * 2013-11-26 2015-06-11 Man Diesel & Turbo Se Verdichter
US20150285085A1 (en) * 2014-04-02 2015-10-08 Solar Turbines Incorporated Variable guide vane extended variable fillet
DE102016212767A1 (de) * 2016-07-13 2018-01-18 MTU Aero Engines AG Verstellbares Turbomaschinen-Schaufelgitter

Also Published As

Publication number Publication date
EP3940200A1 (de) 2022-01-19
US11105207B2 (en) 2021-08-31
US20200056486A1 (en) 2020-02-20
DE102018119704A1 (de) 2020-02-20
US11391169B2 (en) 2022-07-19
EP3611387A2 (de) 2020-02-19
EP3611387B1 (de) 2021-10-06
EP3940200B1 (de) 2024-03-13
US20210340875A1 (en) 2021-11-04

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