WO2015119829A1 - Exhaust-gas turbocharger - Google Patents

Exhaust-gas turbocharger Download PDF

Info

Publication number
WO2015119829A1
WO2015119829A1 PCT/US2015/013501 US2015013501W WO2015119829A1 WO 2015119829 A1 WO2015119829 A1 WO 2015119829A1 US 2015013501 W US2015013501 W US 2015013501W WO 2015119829 A1 WO2015119829 A1 WO 2015119829A1
Authority
WO
WIPO (PCT)
Prior art keywords
exhaust
inlay part
gas turbocharger
turbine housing
ceramic
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.)
Ceased
Application number
PCT/US2015/013501
Other languages
French (fr)
Inventor
Uwe Muenkel
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.)
BorgWarner Inc
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 DE112015000287.1T priority Critical patent/DE112015000287T5/en
Publication of WO2015119829A1 publication Critical patent/WO2015119829A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
    • F01D25/26—Double casings; Measures against temperature strain in casings
    • 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
    • F01D25/005—Selecting particular materials
    • 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
    • F01D9/026—Scrolls for radial machines or engines
    • 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

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 2007 024 130 Al .
  • the turbine housing of said exhaust-gas turbocharger has a metallic outer shell which is provided with an inner shell composed of a ceramic material, wherein a soft intermediate layer is inserted between the outer shell and the inner shell.
  • the outer shell, the inner shell or both shells may be of multi-part form.
  • the aim of this is to make it possible for the the inner shell to be inserted into a geometry of the turbine housing whose internal cavities are larger than the openings of the housing.
  • the inner and outer shells Since, in the case of the known exhaust-gas turbocharger, the inner and outer shells must be manufactured separately before they can subsequently be joined together mechanically, the intermediate layer is necessary to make it possible to compensate different thermal expansion characteristics of the inner and outer shells.
  • Claim 8 defines an inlay part according to the invention as an independently marketable product.
  • Claim 9 defines a method for producing the inlay part according to the invention.
  • FIG. 1 shows a schematically greatly simplified illustration of an exhaust-gas turbocharger according to the invention
  • Figures 2 and 3 show perspective, exploded illustrations, viewed from different perspectives, of the components of the turbine housing according to the invention.
  • Figure 4 shows a sectional illustration through the turbine housing according to the invention in the assembled state.
  • Figure 1 shows a schematically greatly simplified illustration of an exhaust-gas turbocharger 1 which can be formed in the manner according to the invention as explained above.
  • the exhaust-gas turbocharger 1 has a turbine housing 2 in which a turbine wheel 8 is arranged.
  • a bearing housing 10 which is connected to the turbine housing 2, there is mounted a shaft 9 which bears the turbine wheel 8 at one of its ends and which, at its other end, bears a compressor wheel 12 which is arranged in a compressor housing 11 which is likewise connected to the turbine housing 10.
  • the turbine housing 2 has two metallic outer shells 3A and 3B and two halves 4A and 4B of a ceramic inner shell, which is characterized as a whole by the reference sign 4 in Figures 2 to 4.
  • First and second housing flanges 5 and 6, and a holding part 7, are also provided.
  • Figure 4 shows the turbine housing 2 in an assembled state.
  • the ceramic inlay part 4 is formed from the joined-together halves 4A and 4B.
  • the inlay part 4 furthermore has a fixing region 16 which is fixed by two clamping flanges 19A and 19B of the turbine housing 2.
  • the inlay part 4 has a support region 14 which is received in a receiving region 13 of the second housing flange 6 and which bears against an annular stop 15 of the flange 6, as can be seen in detail from the sectional illustration of Figure 4.
  • the inlay part 4 has a pipe stub 17 which is inserted into a receptacle 18 of the first housing flange 5 and which forms a flow connection to the interior of the housing flange 5.
  • the inlay part 14 is, by way of its fixing region 16, the support region 14 and the stub 17, fixed within the turbine housing 2 so as to be spaced apart from an inner wall surface 20 of the turbine housing 2 on all sides.
  • the sheet-metal jacket formed by the outer shells 3A and 3B serve to protect the ceramic inlay part 4.
  • the ceramic inner part 4 in a method similar to an injection- molding process, ceramic compound is firstly forced by an extruder worm into two molds in order to form the halves 4A and 4B.
  • the halves 4A and 4B are formed without undercuts, and thus can be easily removed from the molds.
  • the ceramic blanks that are removed from the molds are dried, and the halves are connected by means of an adhesive, for which purpose, for the precise alignment of the halves 4A and 4B, said halves are preferably provided with recesses and studs.
  • the metallic outer shells 3A and 3B are preferably produced as sheet- metal parts in a deep-drawing process and placed into a tool, and welded to one another for example by means of a laser welding process.
  • the illustration of Figure 4 illustrates in particular that the shaping of the outer shells 3A and 3B is such that all of the weld points are freely accessible, in order that even automated welding is made easily possible.
  • the turbine housing 2 with its metallic outer shell 3A and 3B and its ceramic inlay part 4 are particularly suitable for being produced in high unit quantities.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Supercharger (AREA)

Abstract

The invention relates to an exhaust-gas turbocharger (1) having a turbine housing (2) which has a metallic outer shell (3A, 3B) and which has a ceramic inlay part (4), wherein the inlay part (4) is inlaid into the metallic outer shell (3) so as to be spaced apart from an inner wall surface (20) thereof.

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 2007 024 130 Al . The turbine housing of said exhaust-gas turbocharger has a metallic outer shell which is provided with an inner shell composed of a ceramic material, wherein a soft intermediate layer is inserted between the outer shell and the inner shell.
For this purpose, the outer shell, the inner shell or both shells may be of multi-part form. The aim of this is to make it possible for the the inner shell to be inserted into a geometry of the turbine housing whose internal cavities are larger than the openings of the housing.
Since, in the case of the known exhaust-gas turbocharger, the inner and outer shells must be manufactured separately before they can subsequently be joined together mechanically, the intermediate layer is necessary to make it possible to compensate different thermal expansion characteristics of the inner and outer shells.
This however has the disadvantage that the overall construction of the turbine housing of the known exhaust-gas turbocharger is complex, and is furthermore cumbersome to manufacture and assemble. A further problem is that the intermediate layer can be damaged, if not destroyed entirely, by micro- movements.
It is therefore an object of the present invention to provide an exhaust-gas turbocharger of the type indicated in the preamble of claim 1 which is of simple construction and which permits compensation of thermal deformations in the turbine region.
This object is achieved by the features of claim 1.
Owing to the spacing of the inlay part from the adjacent walls of the turbine housing, any thermal deformation that occurs can be compensated. Dependent claims 2 to 5 relate to advantageous developments of the exhaust-gas turbocharger according to the invention.
Claim 8 defines an inlay part according to the invention as an independently marketable product.
Claim 9 defines a method for producing the inlay part according to the invention.
Further details, advantages and features of the present invention can be found in the following description of exemplary embodiments with reference to the drawing, in which:
Figure 1 shows a schematically greatly simplified illustration of an exhaust-gas turbocharger according to the invention,
Figures 2 and 3 show perspective, exploded illustrations, viewed from different perspectives, of the components of the turbine housing according to the invention, and
Figure 4 shows a sectional illustration through the turbine housing according to the invention in the assembled state.
Figure 1 shows a schematically greatly simplified illustration of an exhaust-gas turbocharger 1 which can be formed in the manner according to the invention as explained above.
The exhaust-gas turbocharger 1 has a turbine housing 2 in which a turbine wheel 8 is arranged. In a bearing housing 10, which is connected to the turbine housing 2, there is mounted a shaft 9 which bears the turbine wheel 8 at one of its ends and which, at its other end, bears a compressor wheel 12 which is arranged in a compressor housing 11 which is likewise connected to the turbine housing 10.
In Figures 2 and 3, the components of the turbine housing according to the invention are shown in exploded illustrations from two different viewing perspectives.
Accordingly, the turbine housing 2 has two metallic outer shells 3A and 3B and two halves 4A and 4B of a ceramic inner shell, which is characterized as a whole by the reference sign 4 in Figures 2 to 4. First and second housing flanges 5 and 6, and a holding part 7, are also provided.
The illustration of Figure 4 shows the turbine housing 2 in an assembled state.
In this state, the two metallic outer shells 3A and 3B have been joined together and connected to the housing flanges 5 and 6.
The ceramic inlay part 4 is formed from the joined-together halves 4A and 4B. The inlay part 4 furthermore has a fixing region 16 which is fixed by two clamping flanges 19A and 19B of the turbine housing 2.
At the end region situated opposite the fixing region 16, the inlay part 4 has a support region 14 which is received in a receiving region 13 of the second housing flange 6 and which bears against an annular stop 15 of the flange 6, as can be seen in detail from the sectional illustration of Figure 4.
Furthermore, the inlay part 4 has a pipe stub 17 which is inserted into a receptacle 18 of the first housing flange 5 and which forms a flow connection to the interior of the housing flange 5.
As is shown here by Figure 4, the inlay part 14 is, by way of its fixing region 16, the support region 14 and the stub 17, fixed within the turbine housing 2 so as to be spaced apart from an inner wall surface 20 of the turbine housing 2 on all sides. This yields the advantage, discussed in the introduction, that thermal deformations can be compensated, for which purpose all of the connections between the inlay part 4 and the turbine housing 2 have sliding fits in order to prevent bending and tensile loads being exerted on the ceramic inlay part 4. In this case, the sheet-metal jacket formed by the outer shells 3A and 3B serve to protect the ceramic inlay part 4.
To produce the ceramic inner part 4, in a method similar to an injection- molding process, ceramic compound is firstly forced by an extruder worm into two molds in order to form the halves 4A and 4B. As shown in the figures, the halves 4A and 4B are formed without undercuts, and thus can be easily removed from the molds. The ceramic blanks that are removed from the molds are dried, and the halves are connected by means of an adhesive, for which purpose, for the precise alignment of the halves 4A and 4B, said halves are preferably provided with recesses and studs. In Figure 2, the recesses 21-23 of the half 4B and one of the studs 24 of the half 4A are visible, it normally being the case that a number of studs corresponding to the number of recesses is provided. The halves 4A and 4B, which are aligned by means of the studs and recesses and which are provisionally connected by means of the adhesive, are then finally connected to form a finished part, in the form of the inlay part 4, in a sintering process at a high pressure and a temperature of approximately 1500°C.
The metallic outer shells 3A and 3B are preferably produced as sheet- metal parts in a deep-drawing process and placed into a tool, and welded to one another for example by means of a laser welding process. Here, the illustration of Figure 4 illustrates in particular that the shaping of the outer shells 3A and 3B is such that all of the weld points are freely accessible, in order that even automated welding is made easily possible.
With regard to the form of the halves 4A and 4B of the ceramic inlay part
4, it must also be pointed out that the illustration in Figures 2 and 3 in particular illustrates that those regions of the halves 4A and 4B which form the volutes have rounded outer regions as far as the part running radially with respect to the turbine, with the result that there is little disruption of the flow, thus making it possible to realize high turbine efficiency.
Owing to this production method, the turbine housing 2 with its metallic outer shell 3A and 3B and its ceramic inlay part 4 are particularly suitable for being produced in high unit quantities.
In addition to the above written disclosure of the invention, reference is hereby explicitly made, for supplementation of said disclosure, to the illustrative representation of the invention in Figures 1 to 4. LIST OF REFERENCE SIGNS
1 Exhaust-gas turbocharger
2 Turbine housing
3A, 3B Metallic outer shell
4 Ceramic inlay part
4A, 4B Halves
5 First housing flange
6 Second housing flange
7 Holding part
8 Turbine wheel
9 Shaft
10 Bearing housing
1 1 Compressor housing
12 Compressor wheel
13 Receiving region
14 Support region
15 Annular stop
16 Fixing region
17 Pipe stub
18 Receptacle of the first housing flange
19 A, 19B Clamping flange
20 Inner wall surface
21-23 Recesses
24 Stud
L Longitudinal axis of the exhaust-gas turbocharger 1

Claims

1. An exhaust-gas turbocharger ( 1 )
having a turbine housing (2)
which has a metallic outer shell (3 A, 3B) and which has a ceramic inlay part (4),
characterized
in that the inlay part (4) is inlaid into the metallic outer shell (3) so as to be spaced apart from an inner wall surface (20) thereof.
2. The exhaust-gas turbocharger as claimed in claim 1, characterized in that the ceramic inlay part (4) has a support region (14) which engages with a sliding fit into a receiving region (13) of a housing flange (6) of the turbine housing (2).
3. The exhaust-gas turbocharger as claimed in claim 1 or 2, characterized in that the inlay part (4) has a pipe stub (17) which engages with a sliding fit into a receptacle (18) of a further housing flange (5) of the turbine housing (2).
4. The exhaust-gas turbocharger as claimed in one of claims 1 to 3, characterized in that the inlay part (4) has a fixing region (16) which is fixed, by way of a sliding fit, by two clamping flanges (19A, 19B) of the turbine housing (2)·
5. The exhaust-gas turbocharger as claimed in claim 4, characterized in that the fixing region (16) is arranged opposite the support region (14).
6. A turbine housing (2) of an exhaust-gas turbocharger (1),
- having a metallic outer shell (3 A, 3B) and
having a ceramic inlay part (4),
characterized in that
the inlay part (4) is inlaid into the metallic outer shell (3) so as to be spaced apart from an inner wall surface (20) thereof.
7. The turbine housing as claimed in claim 6, characterized by one of claims 2 to 5.
8. A ceramic inlay part (4), characterized by two halves (4 A, 4B) which are joined together and sintered.
9. The ceramic inlay part as claimed in claim 8, characterized by one of claims 2 to 5.
10. A method for producing a ceramic inlay part (4), having the following method steps:
providing two ceramic halves (4 A, 4B);
combining the halves (4A, 4B) to form a green product; and sintering the green product.
PCT/US2015/013501 2014-02-04 2015-01-29 Exhaust-gas turbocharger Ceased WO2015119829A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112015000287.1T DE112015000287T5 (en) 2014-02-04 2015-01-29 turbocharger

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014201971 2014-02-04
DE102014201971.0 2014-02-04

Publications (1)

Publication Number Publication Date
WO2015119829A1 true WO2015119829A1 (en) 2015-08-13

Family

ID=53778345

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2015/013501 Ceased WO2015119829A1 (en) 2014-02-04 2015-01-29 Exhaust-gas turbocharger

Country Status (2)

Country Link
DE (1) DE112015000287T5 (en)
WO (1) WO2015119829A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4369020A (en) * 1980-05-05 1983-01-18 Ford Motor Company Rotor seal for wave compression turbocharger
JPS595809A (en) * 1982-07-03 1984-01-12 Nissan Motor Co Ltd Turbine housing
WO2005108747A1 (en) * 2004-05-12 2005-11-17 Honeywell International Inc. Turbocharger with reduced thermal inertia and method of producing the same
US20090130459A1 (en) * 2007-11-20 2009-05-21 General Electric Company Green joining ceramics
US20110286837A1 (en) * 2010-05-20 2011-11-24 Benteler Automobiltechnik Gmbh Exhaust-gas turbocharger

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4369020A (en) * 1980-05-05 1983-01-18 Ford Motor Company Rotor seal for wave compression turbocharger
JPS595809A (en) * 1982-07-03 1984-01-12 Nissan Motor Co Ltd Turbine housing
WO2005108747A1 (en) * 2004-05-12 2005-11-17 Honeywell International Inc. Turbocharger with reduced thermal inertia and method of producing the same
US20090130459A1 (en) * 2007-11-20 2009-05-21 General Electric Company Green joining ceramics
US20110286837A1 (en) * 2010-05-20 2011-11-24 Benteler Automobiltechnik Gmbh Exhaust-gas turbocharger

Also Published As

Publication number Publication date
DE112015000287T5 (en) 2016-11-17

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