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
  • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
  • F04D29/053—Shafts
  • F04D29/054—Arrangements for joining or assembling shafts
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
  • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
  • F01D5/02—Blade-carrying members, e.g. rotors
  • F01D5/025—Fixing blade carrying members on shafts
• • 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
  • 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
  • F05D2230/20—Manufacture essentially without removing material
  • F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
  • F05D2230/232—Manufacture essentially without removing material by permanently joining parts together by welding
• • 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
  • F05D2230/20—Manufacture essentially without removing material
  • F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
  • F05D2230/232—Manufacture essentially without removing material by permanently joining parts together by welding
  • F05D2230/238—Soldering
• • 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
  • F05D2300/10—Metals, alloys or intermetallic compounds
  • F05D2300/17—Alloys
  • F05D2300/174—Titanium alloys, e.g. TiAl

Definitions

• the invention relates to an exhaust-gas turbocharger according to the preamble of claim 1.
• An exhaust-gas turbocharger of this type is known from DE 10 2009 034 420 Al .
• To connect the turbine wheel of this known exhaust-gas turbocharger to a steel shaft it is provided to make a bore both in the wheel rear side of the turbine wheel and in the end face of the shaft, into which bore there is inserted a metallic centering pin, the coefficient of thermal expansion of which corresponds substantially to that of the ceramic turbine wheel.
• a soldered connection is provided to connect the shaft and the turbine wheel.
• connection piece inserted into the bores in the turbine wheel and the shaft is hollow in form. Accordingly, an air space which acts as a heat throttle is formed in the connection piece.
• the connection piece can in this respect be in the form of a bored-out sleeve or of a clamping sleeve.
• connection piece thus performs the task of a heat throttle as well as the task of a centering part between the turbine wheel and the shaft.
• connection piece can be in the form of a circular-cylindrical part or of a part with an angular cross section. In the latter case, in addition to the integral connection, there is also a form fit between the turbine wheel and the shaft.
• soldered connections In principle, soldered connections, adhesively bonded connections or else welded connections are conceivable as integral connections.
• Claims 9 and 10 define a rotor according to the invention of an exhaust-gas turbocharger as an object which can be marketed independently.
• Figure 1 shows a schematically greatly simplified basic illustration of an exhaust- gas turbocharger according to the invention
• Figure 2 shows a partial section through the shaft and the turbine wheel of a rotor of the exhaust-gas turbocharger according to the invention in the region of the point of attachment between the turbine wheel and the shaft.
• Figure 1 shows, in a schematically greatly simplified illustration, an exhaust-gas turbocharger 1 having a shaft 2.
• a turbine wheel of a turbine 4 is arranged at one end of the shaft 2.
• the other end of the shaft 2 is provided with a compressor wheel 10 of a compressor 11.
• a bearing housing 12 for mounting the shaft 2 is provided between the compressor 11 and the turbine 4.
• the exhaust-gas turbocharger according to the invention of course also has all the further parts of such chargers, but these are not shown or explained since they are not required for explaining the principles of the present invention.
• the shaft 2 has a first centric bore 4 on an end face 3 facing toward the turbine wheel 5.
• the turbine wheel 5 has a second centric bore 7 in the wheel rear side 6 thereof. These bores 4 and 7 are arranged in alignment with the longitudinal axis L of the exhaust-gas turbocharger 1.
• the wheel rear side 6 of the turbine wheel 5 is in the form of a shoulder protruding axially in the direction toward the shaft 2. It is also possible, however, for the wheel rear side 6 to be formed with a smooth surface.
• connection piece 8 which, in the assembled state shown in Figure 2, engages into the first and the second bores 4 and 7.
• connection device 9 which, as mentioned in the introduction, can be in the form of a soldered connection, for example.
• connection piece 8 is in the form of a hollow sleeve having an inner space 13 which accommodates an air cushion as a heat throttle.
• the connection piece 8 thus serves both as a centering piece and as a heat throttle, which reduces the introduction of heat from the turbine wheel 5 into the shaft 2.
• it is of course possible to adapt the length and diameter of the connection piece 8 to the respective application, in order to achieve the highest possible heat throttle action.
• it is in principle likewise conceivable to extend the bores 4 and 7 beyond the length of the connection piece 8, in order to lengthen the air space 13 beyond the connection piece 8.
• connection piece 8 can be in the form of a bored-out sleeve or of a hollow clamping sleeve. It may have a circular-cylindrical cross section or else an angular cross section in order to achieve a form- fitting connection in addition to the integral connection.
• the turbine wheel is preferably formed from titanium aluminide (TiAl).
• the shaft 2 is preferably in the form of a steel shaft.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Supercharger (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (1)

Family

ID=49083168

Family Applications (1)

Country Status (7)

Families Citing this family (1)

Citations (6)

Family Cites Families (9)

• 2013
  • 2013-02-21 JP JP2014559925A patent/JP2015508865A/ja active Pending
  • 2013-02-21 US US14/380,480 patent/US20150050126A1/en not_active Abandoned
  • 2013-02-21 DE DE112013000842.4T patent/DE112013000842T5/de not_active Withdrawn
  • 2013-02-21 KR KR1020147026265A patent/KR20140126756A/ko not_active Application Discontinuation
  • 2013-02-21 WO PCT/US2013/027056 patent/WO2013130329A1/en active Application Filing
  • 2013-02-21 CN CN201380009899.7A patent/CN104126063A/zh active Pending
• 2014
  • 2014-07-23 IN IN6184DEN2014 patent/IN2014DN06184A/en unknown

Patent Citations (6)

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