EP1875045A1 - Turbine wheel - Google Patents
Turbine wheelInfo
- Publication number
- EP1875045A1 EP1875045A1 EP06705416A EP06705416A EP1875045A1 EP 1875045 A1 EP1875045 A1 EP 1875045A1 EP 06705416 A EP06705416 A EP 06705416A EP 06705416 A EP06705416 A EP 06705416A EP 1875045 A1 EP1875045 A1 EP 1875045A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hub
- turbine wheel
- blade
- scalloping
- turbine
- 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
Links
- 241000237509 Patinopecten sp. Species 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 235000020637 scallop Nutrition 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- 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
- F01D5/04—Blade-carrying members, e.g. rotors for radial-flow machines or engines
-
- 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
- F01D5/04—Blade-carrying members, e.g. rotors for radial-flow machines or engines
- F01D5/043—Blade-carrying members, e.g. rotors for radial-flow machines or engines of the axial inlet- radial outlet, or vice versa, type
- F01D5/048—Form or construction
-
- 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
-
- 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
- F05D2240/00—Components
- F05D2240/20—Rotors
- F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
-
- 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
-
- 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
- F05D2250/71—Shape curved
Definitions
- the invention relates to the field of exhaust gas turbochargers. It relates to a turbine wheel of a radial or mixed-flow turbine with the features of the preamble of the independent claim.
- Compact exhaust gas turbochargers generally have exhaust gas turbines flowed through strictly radially (radial turbine) or diagonally (mixed-flow turbine).
- the exhaust gas flow is deflected by the turbine wheel and flows in the axial direction.
- the turbine wheels of radial and mixed-flow turbines are often provided with a scalloping.
- the scalloping refers to a recess in the rear wall of the hub of the turbine wheel between the individual blades.
- the main purpose of scalloping is to reduce the mass moment of inertia by cutting out material in the radially outermost region of the turbine wheel.
- the scalloping contour can be formed symmetrically with respect to the exhaust gas inlet edge of the individual rotor blades of the turbine wheel.
- the scalloping contour runs pointed or rounded towards the exhaust gas inlet edge.
- the scalloping contour is usually also rounded so that it comes from the exhaust gas inlet edge to exhaust gas inlet edge of adjacent blades to a continuously extending scalloping contour.
- the scalloping contour can take an asymmetrical course between the exhaust gas inlet edges of adjacent rotor blades.
- the blades are three-dimensionally curved.
- the respective hub cut ie the transition of a blade to the hub, with respect to the radial on a curved course.
- the hub in the area against the radially outermost edge is inclined backwards to the turbine shaft. Due to the three-dimensional blade shape, asymmetric deformation in the area of the scalloping can occur at high speed and the thermal loading of the turbine wheel.
- the rear wall of the hub in the case of a symmetrical scalloping contour as shown in Fig. 2 is pulled radially outwardly by the strong centrifugal forces.
- the surface on the pressure side of the blade rotates about the foot of the blade, as indicated by the thick arrow in the figure. This creates high voltages in the area of the scalloping contour, in particular in the lowest point, which can be life-limiting for the turbine wheel in extreme cases.
- the object of the present invention is to provide a turbine wheel with three-dimensionally curved blades and scalloping in the region of the hub rear wall, in which the stresses occurring due to scalloping deformations are reduced during operation.
- the blade is moved with respect to the scalloping contour to the pressure side.
- the exhaust-gas inlet edge of the blade which is bent toward the pressure side, is thus not at the highest point of the scalloping contour, but is displaced toward the pressure side.
- the hub section of the blade divides the area bounded by the scalloping contour surface of the rear wall of the shaft hub in two equal 'faces. The load of the two partial surfaces with respect to Deformation during operation is thereby aligned and the unilateral maximum load is reduced.
- FIG. 1 shows a turbine wheel embodied under load according to the invention, with a turbine wheel displaced with respect to the point of symmetry of the scalloping contour, with the exhaust gas inlet edges of the rotor blades being displaced,
- FIG. 2 shows a turbine wheel according to the prior art, shown under load, with exhaust gas inlet edges of the rotor blades arranged at the point of symmetry of the scalloping contour
- Fig. 3 is a schematic representation of the rear wall of the hub of the turbine wheel of FIG. 1 in an axially guided section
- Fig. 4 is a schematic representation of the rear wall of the hub of the turbine wheel of Fig. 3 in a guided along the hub surface (IV-IV) section.
- the turbine wheel according to FIG. 1 has a hub 15 and a plurality of rotor blades 14 arranged around the hub.
- the hub is arranged at the end of a rotatably mounted in the housing of an exhaust gas turbocharger turbine shaft 2.
- the hub may be connected to the turbine shaft material fit or via a threaded connection.
- At the other end of the turbine shaft an unillustrated compressor wheel is arranged.
- the turbine wheel drives the compressor wheel.
- the illustrated turbine wheel of a mixed-flow turbine has only a few blades. The number of blades can be freely selected depending on the operating requirements.
- the inlet edges 16 of the blades of the turbine wheel are arranged perpendicular to the flow direction in the mixed-flow turbine.
- the leading edge is not inclined as in the radial turbine perpendicular to the radial, but at an angle to the radial.
- the rear wall of the hub is inclined to the radially outermost region of the turbine wheel towards the turbine shaft educated. This radially outermost region of the hub has a scalloping contour, ie in each case between two blades, material is cut out from the hub rear wall.
- the blades and the hub of the turbine wheel are typically cast or milled in one piece, i. the blades are firmly connected to the hub. in the
- Blade contour and hub shell .
- r For a more understandable explanation of
- the hub cut 12 is reduced in the figures on a line. In FIG. 4, however, in addition to the hub cut 12, the effective course of the cut curve between blade contour and hub surface is also indicated.
- the hub cut 12 thus has a double-curved course according to FIGS. 3 and 4.
- the rotor blades of the turbine wheel according to the invention are arranged with respect to the scalloping contour 11 such that the surfaces of the hub rear wall are uniformly supported on both sides of the rotor blades. This can be explained simply with reference to FIG. 4.
- This rotation can also be seen in the representation of the turbine wheel according to the state of the art - FIG. 2 - clearly illustrated by an arrow.
- the ⁇ figure shows a turbine under load, so that the centrifugal forces caused by the Deformations are made visible.
- the radially outermost edge of the hub of the turbine wheel is loaded due to this rotation with a high voltage.
- the two surfaces Fi and F 2 are aligned with each other.
- the two surfaces are delimited by the scalloping contour 11 on the one hand, and by a connecting line between the radially inwardmost points A and B of the scalloping contour on the suction side and pressure side of the blade.
- the curved hub cut 12 now runs through the middle of the two surfaces and supports them optimally.
- the rotations due to the centrifugal forces are smaller and the turbine wheel is exposed to lower voltages.
- These minor rotations are also shown in the illustration of the turbine wheel according to the invention according to FIG.
- the two arrows indicate the slight deformations.
- the figure shows the turbine wheel under the same load as the turbine wheel according to FIG. 2.
- the radially outermost edge of the hub of the turbine wheel is loaded with significantly lower tension because of these minor twists.
- the exact extent of the displacement of the blade with respect to the scalloping contour depends on various factors. For example, the curvature of the hub cut and the exact shape of the scalloping contour is important.
- the scalloping contour of the illustrated turbine wheels has a symmetrical, wave-shaped course.
- the scalloping contour can also have an asymmetrical course and can run approximately matched to the course of the blade in the region of the hub section.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06705416A EP1875045B1 (en) | 2005-04-27 | 2006-03-24 | Turbine wheel |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05405319A EP1717414A1 (en) | 2005-04-27 | 2005-04-27 | Turbine wheel |
PCT/CH2006/000176 WO2006114007A1 (en) | 2005-04-27 | 2006-03-24 | Turbine wheel |
EP06705416A EP1875045B1 (en) | 2005-04-27 | 2006-03-24 | Turbine wheel |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1875045A1 true EP1875045A1 (en) | 2008-01-09 |
EP1875045B1 EP1875045B1 (en) | 2008-12-17 |
Family
ID=35695045
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05405319A Withdrawn EP1717414A1 (en) | 2005-04-27 | 2005-04-27 | Turbine wheel |
EP06705416A Active EP1875045B1 (en) | 2005-04-27 | 2006-03-24 | Turbine wheel |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05405319A Withdrawn EP1717414A1 (en) | 2005-04-27 | 2005-04-27 | Turbine wheel |
Country Status (8)
Country | Link |
---|---|
US (1) | US7771170B2 (en) |
EP (2) | EP1717414A1 (en) |
JP (1) | JP4718599B2 (en) |
KR (1) | KR101184952B1 (en) |
CN (1) | CN101166890B (en) |
DE (1) | DE502006002383D1 (en) |
RU (1) | RU2007143991A (en) |
WO (1) | WO2006114007A1 (en) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE112013001877T5 (en) * | 2012-05-03 | 2014-12-31 | Borgwarner Inc. | Superback wheel with reduced tension |
CN104736268A (en) * | 2012-11-02 | 2015-06-24 | 博格华纳公司 | Process for producing a turbine wheel |
US9903225B2 (en) | 2015-03-09 | 2018-02-27 | Caterpillar Inc. | Turbocharger with low carbon steel shaft |
US9890788B2 (en) | 2015-03-09 | 2018-02-13 | Caterpillar Inc. | Turbocharger and method |
US9739238B2 (en) | 2015-03-09 | 2017-08-22 | Caterpillar Inc. | Turbocharger and method |
US9683520B2 (en) | 2015-03-09 | 2017-06-20 | Caterpillar Inc. | Turbocharger and method |
US9752536B2 (en) | 2015-03-09 | 2017-09-05 | Caterpillar Inc. | Turbocharger and method |
US9810238B2 (en) | 2015-03-09 | 2017-11-07 | Caterpillar Inc. | Turbocharger with turbine shroud |
US9915172B2 (en) | 2015-03-09 | 2018-03-13 | Caterpillar Inc. | Turbocharger with bearing piloted compressor wheel |
US9732633B2 (en) | 2015-03-09 | 2017-08-15 | Caterpillar Inc. | Turbocharger turbine assembly |
US9650913B2 (en) | 2015-03-09 | 2017-05-16 | Caterpillar Inc. | Turbocharger turbine containment structure |
US9879594B2 (en) | 2015-03-09 | 2018-01-30 | Caterpillar Inc. | Turbocharger turbine nozzle and containment structure |
US9638138B2 (en) | 2015-03-09 | 2017-05-02 | Caterpillar Inc. | Turbocharger and method |
US10006341B2 (en) | 2015-03-09 | 2018-06-26 | Caterpillar Inc. | Compressor assembly having a diffuser ring with tabs |
US9777747B2 (en) | 2015-03-09 | 2017-10-03 | Caterpillar Inc. | Turbocharger with dual-use mounting holes |
US9822700B2 (en) | 2015-03-09 | 2017-11-21 | Caterpillar Inc. | Turbocharger with oil containment arrangement |
US10066639B2 (en) | 2015-03-09 | 2018-09-04 | Caterpillar Inc. | Compressor assembly having a vaneless space |
DE102018132535A1 (en) | 2018-12-17 | 2020-06-18 | Ihi Charging Systems International Gmbh | Impeller for an exhaust gas turbocharger, exhaust gas turbocharger and method for producing a turbine wheel |
US11885238B2 (en) * | 2021-12-03 | 2024-01-30 | Garrett Transportation I Inc. | Turbocharger turbine wheel |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB514420A (en) * | 1937-06-07 | 1939-11-07 | Ferdinando Carlo Reggio | Improvements in or relating to centrifugal blowers or compressors |
US3040670A (en) * | 1959-10-16 | 1962-06-26 | Duriron Co | Pumps |
US4335997A (en) * | 1980-01-16 | 1982-06-22 | General Motors Corporation | Stress resistant hybrid radial turbine wheel |
US4659288A (en) * | 1984-12-10 | 1987-04-21 | The Garrett Corporation | Dual alloy radial turbine rotor with hub material exposed in saddle regions of blade ring |
JP3679875B2 (en) * | 1996-10-31 | 2005-08-03 | 三菱重工業株式会社 | Radial turbine impeller |
JP3462870B2 (en) * | 2002-01-04 | 2003-11-05 | 三菱重工業株式会社 | Impeller for radial turbine |
-
2005
- 2005-04-27 EP EP05405319A patent/EP1717414A1/en not_active Withdrawn
-
2006
- 2006-03-24 RU RU2007143991/06A patent/RU2007143991A/en not_active Application Discontinuation
- 2006-03-24 EP EP06705416A patent/EP1875045B1/en active Active
- 2006-03-24 DE DE502006002383T patent/DE502006002383D1/en active Active
- 2006-03-24 JP JP2008508044A patent/JP4718599B2/en active Active
- 2006-03-24 WO PCT/CH2006/000176 patent/WO2006114007A1/en active Application Filing
- 2006-03-24 KR KR1020077024696A patent/KR101184952B1/en active IP Right Grant
- 2006-03-24 CN CN200680014115XA patent/CN101166890B/en active Active
-
2007
- 2007-10-26 US US11/976,708 patent/US7771170B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2006114007A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2006114007A1 (en) | 2006-11-02 |
EP1875045B1 (en) | 2008-12-17 |
CN101166890A (en) | 2008-04-23 |
KR101184952B1 (en) | 2012-10-02 |
CN101166890B (en) | 2011-12-14 |
RU2007143991A (en) | 2009-06-10 |
EP1717414A1 (en) | 2006-11-02 |
DE502006002383D1 (en) | 2009-01-29 |
JP2008539356A (en) | 2008-11-13 |
US7771170B2 (en) | 2010-08-10 |
KR20080002882A (en) | 2008-01-04 |
US20080063528A1 (en) | 2008-03-13 |
JP4718599B2 (en) | 2011-07-06 |
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