GB2091380A - Exhaust-driven turbocharger - Google Patents

Exhaust-driven turbocharger Download PDF

Info

Publication number
GB2091380A
GB2091380A GB8137177A GB8137177A GB2091380A GB 2091380 A GB2091380 A GB 2091380A GB 8137177 A GB8137177 A GB 8137177A GB 8137177 A GB8137177 A GB 8137177A GB 2091380 A GB2091380 A GB 2091380A
Authority
GB
United Kingdom
Prior art keywords
rotor
exhaust
driven
designed
stub shaft
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
GB8137177A
Other versions
GB2091380B (en
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 Solutions GmbH
Original Assignee
MTU Friedrichshafen GmbH
MTU Motoren und Turbinen Union Friedrichshafen GmbH
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 MTU Friedrichshafen GmbH, MTU Motoren und Turbinen Union Friedrichshafen GmbH filed Critical MTU Friedrichshafen GmbH
Publication of GB2091380A publication Critical patent/GB2091380A/en
Application granted granted Critical
Publication of GB2091380B publication Critical patent/GB2091380B/en
Expired 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
    • 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
    • F01D5/026—Shaft to shaft connections
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supercharger (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

The radially non-split bearings (13, 14) of an exhaust-driven turbocharger are arranged between the two rotors which comprise respectively an exhaust-driven turbine (11) and a supercharger blower (12). Both rotors are designed as a solid disc so as to avoid the high material stress which would otherwise occur at a hub bore at high rpm. For the shaft connection, a stub shaft is arranged on each rotor on those sides facing one another after assembly, which stub shaft in the case of the super- charger blower (12) is designed as a threaded bolt (15) and in the case of the exhaust-driven turbine (11) is designed as a bearing-support tube (16) with an internal thread (18) fitting the threaded bolt (15). <IMAGE>

Description

SPECIFICATION Exhaust-driven turbocharger The invention relates to exhaust-driven turbochargers.
In known exhaust-driven turbochargers, wherein the bearings are arranged between the rotors, the rotor shaft is connected to the first rotor, which has a centre full or solid disc. The second rotor, which has a centre through-bore in the rotor hub, is fitted and fastened on to the free end of the rotor shaft as the final part after assembly of the mounting.
This proven mode of construction results in a short overail length and, taking into consideration the admissible material stresses, high operational reliability of an exhaust-driven turbocharger of this type. The material stress at the centre bore in the rotor hub of the second rotor is decisive for the maximum attainable speed of rotation. Coinpared with a solid disc, the material stress at the bore of the rotor hub is almost twice as great at the same speed.
The invention provides an exhaust-driven turbocharger with a respective rotor for an exhaust-driven turbine and for a supercharger blower, having a radially non-split mounting disposed between the two rotors, wherein both rotors are fuli or solid discs, and wherein on each rotor a stub shaft is provided which in the case of one rotor is designed as a bolt and in the case of the other rotor is designed with a blind bore for the axial location of the bolt.
Two examples of embodiment of the invention are illustrated in the drawing and will be described in more detail below.
Figure 1 shows a longitudinal section through an exhaust-driven turbocharger; Figure 2 shows a cutaway section with a variant of the shaft connection.
An exhaust-driven turbocharger has a respective rotor for an exhaust-driven turbine 11 and for a supercharger blower 12, in which case the radially non-split bearings 13, 14 are arranged between the two rotors. A stub shaft is arranged on each of the two rotors designed as solid discs, on those sides facing one another after assembly.
In the case of the rotor for the supercharger blower 12, the stub shaft is designed as a threaded bolt 1 5 which is joined to the rotor at its flange end 1 9 by welding, preferably by friction welding. The stub shaft on the rotor for the exhaust-driven turbine 11 is designed as a bearing-support tube 1 6 having a blind-end bore 17 in which there is an internal thread 18 engaging with the threaded bolt 1 5. The bearingsupport tube 1 6 at its flange end 20 is connected on an annular surface by friction welding to the rotor for the exhaust-driven turbine 11.
The assembly of the exhaust-driven turbocharger is commenced starting from the rotor for the exhaust-driven turbine 11. After all the parts arranged between the rotors have been installed, the rotor for the supercharger blower 1 2 is screwed to the rotor for the exhaust-driven turbine 11 via the threaded bolt 1 5 and via the internal thread 1 8 in the bearing-support tube 1 6.
For the transmission of torque between the exhaust-driven turbine 11 and the supercharger blower 12, the screw-coupling is tightened to such an extent that sufficient frictional resistance is produced at the mutually abutting end faces of bearing-support tube 16, intermediate ring 21 and rotor for the supercharger blower 12.
Figure 2 illustrates a variant for the shaft connection between the rotor for the exhaustdriven turbine 11 and the rotor for the supercharger blower 12. Here the internal thread 28 is disposed in a short stub 27 of the rotor of the exhaust-driven turbine and the bearingsupport tube 26, which is designed as a loose part, is centred on the stub shaft 27. Compared with the embodiment according to Figure 1 , the threaded bolt 25 is slightly longer in design. The assembly of the exhaust-driven turbocharger takes place in the same way as described above.
A further variant, not shown in the drawing, for the shaft connection between the rotor for the exhaust-driven turbine 11 and the rotor for the supercharger blower 12 lies in that the stub shaft designed as a bolt forms with the blind bore in the other stub shaft a conical or cylindrical press joint or fastening.
The advantages achieved with the specific embodiment of the invention lie particularly in that it is possible to retain the existing principal of axial installation, with constant visual inspection, in that it is possible to utilise the known advantages of full or solid-disc rotors in this proven bearing design for exhaust-driven turbochargers, in that an increase in the maximum speed is attained, for example with a given material, or in that for a desired relatively high maximum speed it is possible to avoid the change to a material having greater strength and therefore a higher price.
1. An exhaust-driven turbocharger with a respective rotor for an exhaust-driven turbine and for a supercharger blower, having a radially nonsplit mounting disposed between the two rotors, wherein both rotors are full or solid discs, and wherein on each rotor a stub shaft is provided which in the case of one rotor is designed as a bolt and in the case of the other rotor is designed with a blind bore for the axial location of the bolt.
2. An exhaust-driven turbocharger as claimed in Claim 1 , wherein one stub shaft is designed as a threaded bolt and the blind bore in the other stub shaft is designed as an internal thread engageable with the bolt.
3. An exhaust-driven turbocharger as claimed in Claim 1, wherein the stub shaft designed as a bolt and the blind bore in the other stub shaft form a press joint.
4. An exhaust-driven turbocharger as claimed in any of the preceding claims wherein at least the stub shaft designed as a bolt is joined to the rotor by welding.
5. An exhaust-driven turbocharger as claimed
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (11)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Exhaust-driven turbocharger The invention relates to exhaust-driven turbochargers. In known exhaust-driven turbochargers, wherein the bearings are arranged between the rotors, the rotor shaft is connected to the first rotor, which has a centre full or solid disc. The second rotor, which has a centre through-bore in the rotor hub, is fitted and fastened on to the free end of the rotor shaft as the final part after assembly of the mounting. This proven mode of construction results in a short overail length and, taking into consideration the admissible material stresses, high operational reliability of an exhaust-driven turbocharger of this type. The material stress at the centre bore in the rotor hub of the second rotor is decisive for the maximum attainable speed of rotation. Coinpared with a solid disc, the material stress at the bore of the rotor hub is almost twice as great at the same speed. The invention provides an exhaust-driven turbocharger with a respective rotor for an exhaust-driven turbine and for a supercharger blower, having a radially non-split mounting disposed between the two rotors, wherein both rotors are fuli or solid discs, and wherein on each rotor a stub shaft is provided which in the case of one rotor is designed as a bolt and in the case of the other rotor is designed with a blind bore for the axial location of the bolt. Two examples of embodiment of the invention are illustrated in the drawing and will be described in more detail below. Figure 1 shows a longitudinal section through an exhaust-driven turbocharger; Figure 2 shows a cutaway section with a variant of the shaft connection. An exhaust-driven turbocharger has a respective rotor for an exhaust-driven turbine 11 and for a supercharger blower 12, in which case the radially non-split bearings 13, 14 are arranged between the two rotors. A stub shaft is arranged on each of the two rotors designed as solid discs, on those sides facing one another after assembly. In the case of the rotor for the supercharger blower 12, the stub shaft is designed as a threaded bolt 1 5 which is joined to the rotor at its flange end 1 9 by welding, preferably by friction welding. The stub shaft on the rotor for the exhaust-driven turbine 11 is designed as a bearing-support tube 1 6 having a blind-end bore 17 in which there is an internal thread 18 engaging with the threaded bolt 1 5. The bearingsupport tube 1 6 at its flange end 20 is connected on an annular surface by friction welding to the rotor for the exhaust-driven turbine 11. The assembly of the exhaust-driven turbocharger is commenced starting from the rotor for the exhaust-driven turbine 11. After all the parts arranged between the rotors have been installed, the rotor for the supercharger blower 1 2 is screwed to the rotor for the exhaust-driven turbine 11 via the threaded bolt 1 5 and via the internal thread 1 8 in the bearing-support tube 1 6. For the transmission of torque between the exhaust-driven turbine 11 and the supercharger blower 12, the screw-coupling is tightened to such an extent that sufficient frictional resistance is produced at the mutually abutting end faces of bearing-support tube 16, intermediate ring 21 and rotor for the supercharger blower 12. Figure 2 illustrates a variant for the shaft connection between the rotor for the exhaustdriven turbine 11 and the rotor for the supercharger blower 12. Here the internal thread 28 is disposed in a short stub 27 of the rotor of the exhaust-driven turbine and the bearingsupport tube 26, which is designed as a loose part, is centred on the stub shaft 27. Compared with the embodiment according to Figure 1 , the threaded bolt 25 is slightly longer in design. The assembly of the exhaust-driven turbocharger takes place in the same way as described above. A further variant, not shown in the drawing, for the shaft connection between the rotor for the exhaust-driven turbine 11 and the rotor for the supercharger blower 12 lies in that the stub shaft designed as a bolt forms with the blind bore in the other stub shaft a conical or cylindrical press joint or fastening. The advantages achieved with the specific embodiment of the invention lie particularly in that it is possible to retain the existing principal of axial installation, with constant visual inspection, in that it is possible to utilise the known advantages of full or solid-disc rotors in this proven bearing design for exhaust-driven turbochargers, in that an increase in the maximum speed is attained, for example with a given material, or in that for a desired relatively high maximum speed it is possible to avoid the change to a material having greater strength and therefore a higher price. CLAIMS
1. An exhaust-driven turbocharger with a respective rotor for an exhaust-driven turbine and for a supercharger blower, having a radially nonsplit mounting disposed between the two rotors, wherein both rotors are full or solid discs, and wherein on each rotor a stub shaft is provided which in the case of one rotor is designed as a bolt and in the case of the other rotor is designed with a blind bore for the axial location of the bolt.
2. An exhaust-driven turbocharger as claimed in Claim 1 , wherein one stub shaft is designed as a threaded bolt and the blind bore in the other stub shaft is designed as an internal thread engageable with the bolt.
3. An exhaust-driven turbocharger as claimed in Claim 1, wherein the stub shaft designed as a bolt and the blind bore in the other stub shaft form a press joint.
4. An exhaust-driven turbocharger as claimed in any of the preceding claims wherein at least the stub shaft designed as a bolt is joined to the rotor by welding.
5. An exhaust-driven turbocharger as claimed in Claim 4, wherein the bolt is joined to the rotor at a flange end by friction welding.
6. An exhaust-driven turbocharger as claimed in any of the preceding claims wherein the stub shaft provided with the blind bore is connected at a flange end on an annular surface by friction welding to the rotor.
7. An exhaust-driven turbocharger as claimed in any of the preceding claims, wherein the stub shaft with the blind bore is designed on the outer diameter as a bearing-support tube.
8. An exhaust-driven turbocharger as claimed in Claim 1, wherein the stub shaft for the blind bore and the rotor are made integraliy from the same material.
9. An exhaust-driven turbocharger as claimed in Claim 8, wherein the bearing-support tube is a loose part centred on the stub shaft of the rotor.
1 0. An exhaust-driven turbocharger as claimed in Claim 1, wherein the blind bore is provided in the rotor of the exhaust-driven turbine.
11. An exhaust-driven turbocharger substantially as hereinbefore described with reference to and as shown in Figure 1 or Figure 2.
GB8137177A 1981-01-16 1981-12-09 Exhaust-driven turbocharger Expired GB2091380B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813101162 DE3101162C2 (en) 1981-01-16 1981-01-16 Exhaust gas turbocharger

Publications (2)

Publication Number Publication Date
GB2091380A true GB2091380A (en) 1982-07-28
GB2091380B GB2091380B (en) 1984-07-18

Family

ID=6122704

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8137177A Expired GB2091380B (en) 1981-01-16 1981-12-09 Exhaust-driven turbocharger

Country Status (3)

Country Link
DE (1) DE3101162C2 (en)
FR (1) FR2498251B1 (en)
GB (1) GB2091380B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0129311A1 (en) * 1983-04-21 1984-12-27 The Garrett Corporation Compressor wheel assembly
US4705463A (en) * 1983-04-21 1987-11-10 The Garrett Corporation Compressor wheel assembly for turbochargers
GB2402991A (en) * 2003-06-18 2004-12-22 Komatsu Mfg Co Ltd Rotor of turbo machine with integral threaded shaft stud for shaft coupling
JP2011122539A (en) * 2009-12-11 2011-06-23 Ihi Corp Supercharger
CN1869407B (en) * 2004-12-14 2011-09-14 霍尼韦尔国际公司 Compressor wheel
CN114033717A (en) * 2021-11-02 2022-02-11 潍坊科技学院 Compact turbine rotor device of turbo charger high strength end face location

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008056058A1 (en) 2008-08-04 2010-02-11 Mtu Friedrichshafen Gmbh Exhaust gas turbo charger, has rotor and compressor rotor coaxially connected via shaft, thread adapter screwed on shaft from side of compressor, and centric recess provided with internal thread fitted at external thread at thread adapter
DE102008056061B4 (en) 2008-08-04 2020-04-16 Mtu Friedrichshafen Gmbh Exhaust gas turbocharger and method for assembling an exhaust gas turbocharger
DE102008056059B4 (en) 2008-08-04 2010-11-18 Mtu Friedrichshafen Gmbh Exhaust gas turbocharger and method for assembling an exhaust gas turbocharger

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB898164A (en) * 1960-01-26 1962-06-06 Austin Motor Co Ltd Improved means for clamping rotor assemblies
DE1233208B (en) * 1962-05-02 1967-01-26 Schwitzer Corp Lubricating device for the bearings of exhaust gas turbochargers of internal combustion engines
FR1468658A (en) * 1963-08-06 1967-02-10 Ncr Co Improvements to parallel adders
US3904301A (en) * 1974-07-24 1975-09-09 Allis Chalmers Hub locking arrangement

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0129311A1 (en) * 1983-04-21 1984-12-27 The Garrett Corporation Compressor wheel assembly
US4705463A (en) * 1983-04-21 1987-11-10 The Garrett Corporation Compressor wheel assembly for turbochargers
GB2402991A (en) * 2003-06-18 2004-12-22 Komatsu Mfg Co Ltd Rotor of turbo machine with integral threaded shaft stud for shaft coupling
CN1869407B (en) * 2004-12-14 2011-09-14 霍尼韦尔国际公司 Compressor wheel
JP2011122539A (en) * 2009-12-11 2011-06-23 Ihi Corp Supercharger
CN114033717A (en) * 2021-11-02 2022-02-11 潍坊科技学院 Compact turbine rotor device of turbo charger high strength end face location
CN114033717B (en) * 2021-11-02 2023-07-04 潍坊科技学院 High-strength end face positioning compact turbine rotor device of turbocharger

Also Published As

Publication number Publication date
FR2498251B1 (en) 1985-06-28
FR2498251A1 (en) 1982-07-23
GB2091380B (en) 1984-07-18
DE3101162A1 (en) 1982-08-05
DE3101162C2 (en) 1983-10-20

Similar Documents

Publication Publication Date Title
US6896479B2 (en) Turbocharger rotor
US7374402B2 (en) Fastening arrangement for an impeller on a shaft
US5163816A (en) Wheel lock, centering and drive means and turbocharger impeller combination
US7008191B2 (en) Compressor wheel assembly
CA2352031C (en) Conically jointed turbocharger rotor
EP1193370B1 (en) Turbocharger rotor with alignment couplings
US20120297770A1 (en) Exhaust-gas power-recovery turbine for a turbo compound system
US6634853B1 (en) Compact centrifugal compressor
CA2614092C (en) Prestressed shaft/hub connection having a perfect cone shape
US6905316B2 (en) Turbine
GB2281105A (en) Bearing assembly
GB2091380A (en) Exhaust-driven turbocharger
JPS61252803A (en) Turbine rotor assembly
JPH06257669A (en) Support structure for friction coupling drum
US4832637A (en) Marine engine driveshaft coupling
EP0138516A1 (en) Centrifugal compressor wheel and its mounting on a shaft
GB2464182A (en) Spline couplings having a rotational pre-load
US3531216A (en) Shaft attaching means for pump impeller
JPH0159444B2 (en)
CN112240226B (en) Rotor assembly, aircraft engine and assembly method of rotor assembly
EP3798467A1 (en) Drive train of a wind turbine comprising a coupling shaft for compensating concentricity tolerances and misalignment of a gearbox output axis and a generator turning axis
JPS61252802A (en) Ladder type locking device
JPH06100083B2 (en) Fixing mechanism of impeller of centrifugal compressor or centrifugal turbine
SU958749A1 (en) Assembly for securing turbine impeller of torque coverter
JPS6221697Y2 (en)

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee