[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

WO2016028501A1 - Exhaust-gas turbocharger - Google Patents

Exhaust-gas turbocharger Download PDF

Info

Publication number
WO2016028501A1
WO2016028501A1 PCT/US2015/043916 US2015043916W WO2016028501A1 WO 2016028501 A1 WO2016028501 A1 WO 2016028501A1 US 2015043916 W US2015043916 W US 2015043916W WO 2016028501 A1 WO2016028501 A1 WO 2016028501A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
exhaust
gas turbocharger
groove
bushing
Prior art date
Application number
PCT/US2015/043916
Other languages
French (fr)
Inventor
Michael LOEWENBERG
Original Assignee
Borgwarner Inc.
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 Borgwarner Inc. filed Critical Borgwarner Inc.
Priority to DE112015003803.5T priority Critical patent/DE112015003803T5/en
Publication of WO2016028501A1 publication Critical patent/WO2016028501A1/en

Links

Classifications

    • 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
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
    • 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
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
    • F16C17/18—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with floating brasses or brushing, rotatable at a reduced speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
    • F16C33/1065—Grooves on a bearing surface for distributing or collecting the liquid
    • 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
    • F05D2220/00—Application
    • F05D2220/40—Application in turbochargers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
    • F16C17/24—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with devices affected by abnormal or undesired positions, e.g. for preventing overheating, for safety
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/26—Systems consisting of a plurality of sliding-contact bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/23—Gas turbine engines
    • F16C2360/24—Turbochargers

Definitions

  • the invention relates to an exhaust-gas turbocharger according to the preamble of claim 1.
  • An exhaust-gas turbocharger of said type is known from DE 10 2012 202 341
  • wave profile is to be understood to mean the rotational movement behavior of the rotor (assembly composed of charger shaft, turbine wheel and compressor wheel), which is influenced by pulsating load on the turbine, by the inherent residual imbalance of the rotor, and by mechanical vibrations of the engine and which is itself excited to perform vibrations.
  • Claims 8 and 9 define a radial bearing arrangement according to the invention as an independently marketable object of the exhaust-gas turbocharger according to the invention.
  • Figure 1 is a sectional illustration of an exhaust-gas turbocharger according to the invention, which is illustrated by way of its core assembly, with only the compressor housing and the turbine housing not being illustrated, these however being provided in the case of the exhaust-gas turbocharger according to the invention;
  • Figure 2 shows an enlarged detail sectional illustration of the bearing arrangement according to the invention
  • Figure 3 shows an illustration, corresponding to Figure 2, of one of the bearing bushings of the bearing arrangement as per Figure 2;
  • Figures 4-6 are illustrations corresponding to Figure 3 for the purpose of illustrating different groove configurations of the charger shaft.
  • an exhaust-gas turbocharger 1 according to the invention is illustrated by way of its core assembly, with only a compressor housing and a turbine housing not being illustrated.
  • Figure 1 shows a charger shaft 2 which is mounted on a bearing housing 3 by way of a bearing arrangement 4.
  • the bearing arrangement 4 has a first bearing bushing 5 and, spaced apart therefrom, a second bearing bushing 6, said bearing bushings being separated from one another by a spacer sleeve 7.
  • the illustration also shows a compressor wheel 18 and a turbine wheel 17 which are fixed to the two ends of the charger shaft 2.
  • FIG 2 shows the construction of the bearing arrangement 4 according to the invention in detail.
  • said bearing arrangement 4 has two bearing bushings in the form of the bearing bushings 5 and 6.
  • Figure 2 also illustrates that the first bearing bushing 5 has a bore 13 and the second bearing bushing 6 has a bore 8, which are each oriented at least approximately at right angles with respect to the longitudinal axis L of the bearing arrangement 4.
  • figure 3 shows that, in the embodiment illustrated, the bore 8 is fluidically connected to, or issues into, a groove 10 of the charger shaft 2.
  • An oil volume situated in the groove 10 is larger than that in a radial gap 15 formed on the first bearing bushing 5.
  • the oil gap which is enlarged in said region thus gives rise to lower shear forces at said location, and thus to a reduction in rotational speed of the bushing.
  • the grooves may be of symmetrical or asymmetrical form.
  • the groove 10 and the groove 11 illustrated in Figure 5 are in this case of symmetrical configuration.
  • the groove 10 has an approximately rectangular cross section, whereas the groove 11 has a triangular cross section, as can be seen from Figures 4 and 5.
  • the groove 12 of a symmetrical form has the cross section of a right-angled or isosceles triangle, the acute angle of which is arranged adjacent to the transverse bore 8.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Supercharger (AREA)

Abstract

The invention relates to an exhaust-gas turbocharger (1) having a charger shaft (2); and having a bearing housing (3), which comprises a radical bearing arrangement (4), characterized in that the charger shaft (2) has a groove (10; 11; 12) in the region of at least one bearing bushing (5; 6).

Description

EXHAUST-GAS TURBOCHARGER DESCRIPTION The invention relates to an exhaust-gas turbocharger according to the preamble of claim 1.
An exhaust-gas turbocharger of said type is known from DE 10 2012 202 341
Al .
Tests carried out in the context of the invention have shown that the bearing arrangement of the exhaust-gas turbocharger known from said document exhibits a tendency for destabilization of a wave profile of a rotor and for noise generation. The expression "wave profile" is to be understood to mean the rotational movement behavior of the rotor (assembly composed of charger shaft, turbine wheel and compressor wheel), which is influenced by pulsating load on the turbine, by the inherent residual imbalance of the rotor, and by mechanical vibrations of the engine and which is itself excited to perform vibrations.
It is therefore an object of the present invention to provide an exhaust-gas turbocharger of the type specified in the preamble of claim 1 , with which it is possible to stabilize the wave profile and positively influence acoustic frequency bands emitted by the bearing arrangement.
This object is achieved by the features of claim 1.
By means of bearing play at a bearing bushing, it is possible for the rotational speed of the bearing bushing to be varied by way of the shear forces in the oil of the radical bearing arrangement. The minimum oil gap provided between bearing bushing and charger shaft can be kept the same as before.
The dependent claims contain advantageous developments of the invention.
Claims 8 and 9 define a radial bearing arrangement according to the invention as an independently marketable object of the exhaust-gas turbocharger according to the invention.
Further details, features and advantages of the invention become apparent from the following description of exemplary embodiments with reference to the drawing, in which:
Figure 1 is a sectional illustration of an exhaust-gas turbocharger according to the invention, which is illustrated by way of its core assembly, with only the compressor housing and the turbine housing not being illustrated, these however being provided in the case of the exhaust-gas turbocharger according to the invention;
Figure 2 shows an enlarged detail sectional illustration of the bearing arrangement according to the invention;
Figure 3 shows an illustration, corresponding to Figure 2, of one of the bearing bushings of the bearing arrangement as per Figure 2; and
Figures 4-6 are illustrations corresponding to Figure 3 for the purpose of illustrating different groove configurations of the charger shaft.
In Figure 1, an exhaust-gas turbocharger 1 according to the invention is illustrated by way of its core assembly, with only a compressor housing and a turbine housing not being illustrated.
Accordingly, Figure 1 shows a charger shaft 2 which is mounted on a bearing housing 3 by way of a bearing arrangement 4. The bearing arrangement 4 has a first bearing bushing 5 and, spaced apart therefrom, a second bearing bushing 6, said bearing bushings being separated from one another by a spacer sleeve 7.
The illustration also shows a compressor wheel 18 and a turbine wheel 17 which are fixed to the two ends of the charger shaft 2.
Figure 2 shows the construction of the bearing arrangement 4 according to the invention in detail. As already discussed above on the basis of Figure 1, said bearing arrangement 4 has two bearing bushings in the form of the bearing bushings 5 and 6.
Figure 2 also illustrates that the first bearing bushing 5 has a bore 13 and the second bearing bushing 6 has a bore 8, which are each oriented at least approximately at right angles with respect to the longitudinal axis L of the bearing arrangement 4.
Here, figure 3 shows that, in the embodiment illustrated, the bore 8 is fluidically connected to, or issues into, a groove 10 of the charger shaft 2. An oil volume situated in the groove 10 is larger than that in a radial gap 15 formed on the first bearing bushing 5. The oil gap which is enlarged in said region thus gives rise to lower shear forces at said location, and thus to a reduction in rotational speed of the bushing.
As is clear from the illustrations of Figures 4 to 6, the grooves may be of symmetrical or asymmetrical form. The groove 10 and the groove 11 illustrated in Figure 5 are in this case of symmetrical configuration. Here, the groove 10 has an approximately rectangular cross section, whereas the groove 11 has a triangular cross section, as can be seen from Figures 4 and 5. The groove 12 of a symmetrical form has the cross section of a right-angled or isosceles triangle, the acute angle of which is arranged adjacent to the transverse bore 8.
In summary, it can thus be stated that, owing to the embodiment of the bearing arrangement 4 according to the invention as discussed above, rotational speed regulation is possible by way of non-constant shear forces. This is achieved according to the invention in that, without the minimum oil gap being increased, a greater oil volume is provided radially between the charger shaft 2 and at least one of the bearing bushings 5, 6. In said revolving oil volume, shear forces in the oil inevitably lead to a different frictional torque between the respective bearing bushing 5 or 6 and the charger shaft 2. As a result, the bushings 5, 6 rotate asynchronously, such that the excitation of and generation of body-borne noise in the two bearing bushings 5, 6 is also asynchronous. Accordingly, the excitations take place at different frequencies, at which, in turn, the amplitudes are smaller.
In addition to the above written disclosure of the invention, reference is explicitly made to the illustrative presentation of the invention in Figures 1 to 6.
LIST OF REFERENCE SIGNS
Exhaust-gas turbocharger
2 Charger shaft
3 Bearing housing
4 Bearing arrangement
5 First bearing bushing
6 Second bearing bushing
7 Spacer sleeve / spacer
8 Transverse bore
9 Oil gap
10-12 Grooves
13 Transverse bore
14, 16 Outer edges
15 Radial gap
17 Turbine wheel
18 Compressor wheel
S 1 , S2 Bearing plays
L Longitudinal axis
A Spacing of the bearing bushings 5 and 6 between their axial outer edges 14 and 16 lying against the charger shaft 2

Claims

1. An exhaust-gas turbocharger ( 1 )
having a charger shaft (2); and
- having a bearing housing (3),
• which comprises a bearing arrangement (4) with bearing bushings (5; 6),
characterized
in that the charger shaft (2) has a groove (10; 11; 12) in the region of at least one bearing bushing (5; 6).
2. The exhaust-gas turbocharger as claimed in claim 1, characterized in that the bearing bushings (5, 6) are equipped with a bore (13 and 8 respectively).
3. The exhaust-gas turbocharger as claimed in claim 1, characterized in that the groove (10, 11) is of symmetrical form.
4. The exhaust-gas turbocharger as claimed in claim 1, characterized in that the groove (10) has an approximately rectangular cross section.
5. The exhaust-gas turbocharger as claimed in claim 1, characterized in that the groove (11) has an arrow tip-shaped cross section.
6. The exhaust-gas turbocharger as claimed in claim 1, characterized in that the groove (12) is of asymmetrical form.
7. The exhaust-gas turbocharger as claimed in claim 8, characterized in that the groove (12) has a triangular cross section.
8. A bearing arrangement (4) of an exhaust-gas turbocharger (1),
having a first bearing bushing (5) and
having a second bearing bushing (6), characterized in that, in the installed state, a groove (10; 11; 12) is arranged in the region of at least one of the bearing bushings (5, 6).
9. The bearing arrangement as claimed in claim 8, characterized in that the bearing bushings (5, 6) are equipped with a bore (13 and 8 respectively).
PCT/US2015/043916 2014-08-19 2015-08-06 Exhaust-gas turbocharger WO2016028501A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112015003803.5T DE112015003803T5 (en) 2014-08-19 2015-08-06 turbocharger

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014216448 2014-08-19
DE102014216448.6 2014-08-19

Publications (1)

Publication Number Publication Date
WO2016028501A1 true WO2016028501A1 (en) 2016-02-25

Family

ID=53887218

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2015/043916 WO2016028501A1 (en) 2014-08-19 2015-08-06 Exhaust-gas turbocharger

Country Status (2)

Country Link
DE (1) DE112015003803T5 (en)
WO (1) WO2016028501A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11560924B2 (en) * 2020-03-03 2023-01-24 Borgwarner Inc. Bearing assembly for a charging apparatus
US11598372B2 (en) 2020-03-03 2023-03-07 Borgwarner Inc. Bearing assembly for a charging apparatus

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003035310A (en) * 2001-07-24 2003-02-07 Hitachi Powdered Metals Co Ltd Structure of dynamic pressure sleeve bearing
DE102008000554A1 (en) * 2008-03-07 2009-09-10 Bosch Mahle Turbo Systems Gmbh & Co. Kg Shaft for exhaust-gas turbocharger of internal combustion engine, has radially bearing surfaces provided with bearing bushing for forming radial bearing, where bearing surfaces are provided with coating whose thickness is irregularly formed
WO2010135135A2 (en) * 2009-05-18 2010-11-25 Borgwarner Inc. Hydrodynamic bearing
US20130129506A1 (en) * 2010-06-02 2013-05-23 Bosch Mahle Turbo Systems Gmbh & Co. Kg Exhaust gas turbocharger with plain bearing for reducing fluid turbulence
EP2599979A2 (en) * 2011-12-02 2013-06-05 Bosch Mahle Turbo Systems GmbH & Co. KG Turbocharger
DE102012202341A1 (en) 2012-02-16 2013-08-22 Continental Automotive Gmbh Radial bearing for supercharger for motor car, has non-intersecting grooves which are helically formed around outer surface of shaft, so as to enhance lubrication oil supply by hole of floating socket

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003035310A (en) * 2001-07-24 2003-02-07 Hitachi Powdered Metals Co Ltd Structure of dynamic pressure sleeve bearing
DE102008000554A1 (en) * 2008-03-07 2009-09-10 Bosch Mahle Turbo Systems Gmbh & Co. Kg Shaft for exhaust-gas turbocharger of internal combustion engine, has radially bearing surfaces provided with bearing bushing for forming radial bearing, where bearing surfaces are provided with coating whose thickness is irregularly formed
WO2010135135A2 (en) * 2009-05-18 2010-11-25 Borgwarner Inc. Hydrodynamic bearing
US20130129506A1 (en) * 2010-06-02 2013-05-23 Bosch Mahle Turbo Systems Gmbh & Co. Kg Exhaust gas turbocharger with plain bearing for reducing fluid turbulence
EP2599979A2 (en) * 2011-12-02 2013-06-05 Bosch Mahle Turbo Systems GmbH & Co. KG Turbocharger
DE102012202341A1 (en) 2012-02-16 2013-08-22 Continental Automotive Gmbh Radial bearing for supercharger for motor car, has non-intersecting grooves which are helically formed around outer surface of shaft, so as to enhance lubrication oil supply by hole of floating socket

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11560924B2 (en) * 2020-03-03 2023-01-24 Borgwarner Inc. Bearing assembly for a charging apparatus
US11598372B2 (en) 2020-03-03 2023-03-07 Borgwarner Inc. Bearing assembly for a charging apparatus

Also Published As

Publication number Publication date
DE112015003803T5 (en) 2017-05-04

Similar Documents

Publication Publication Date Title
US9638059B2 (en) Exhaust-gas turbocharger
US11002335B2 (en) Controllable magneto-rheological device for gas turbine engine
US8118540B2 (en) Split ring for a rotary part of a turbomachine
JP5543032B2 (en) Blade arrangement and gas turbine having the blade arrangement
KR20080040000A (en) Damper element of bearing, method of manufacturing damper element, bearing, and gas turbine engine
US10724375B2 (en) Gas turbine engine with ring damper
WO2007148390A1 (en) Bearing structure for rotating machine, rotating machine, method of producing bearing structure, and method of producing rotating machine
US10767690B2 (en) Bearing housing with damping arrangement
JP5314194B2 (en) Turbomachine rotor
MX2014012987A (en) High damping labyrinth seal with helicoidal or helicoidal-cylindrical mixed pattern.
EP3754168A1 (en) Supercharger
CN105164449A (en) Rotary viscous vibration damper or rotary viscous vibration absorber
WO2016028501A1 (en) Exhaust-gas turbocharger
EP3163103B1 (en) Bearing device and rotary machine
EP3150796B1 (en) Gas turbine disk assembly
GB2522324A (en) Bearing cage with a peripheral vibration damping ring
CN213954005U (en) Vibration suppression device for rotary machine and rotary machine
JP5956365B2 (en) Turbine blade cascade assembly and steam turbine equipment
US11808170B2 (en) Turbomachine assembly having a damper
JP2015163766A (en) Blade and rotary machine
WO2015009560A1 (en) Exhaust-gas turbocharger
CN108252745B (en) Multi-stage turbine rotor
US9624777B2 (en) Mobile member of a turbomachine which comprises means for changing the resonance frequency of same
US11828191B2 (en) Assembly for turbomachine
JP2016537553A (en) Annular elements of turbomachine casing

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15753263

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 112015003803

Country of ref document: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15753263

Country of ref document: EP

Kind code of ref document: A1