Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
  • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
  • F02B39/14—Lubrication of pumps; Safety measures therefor
• • 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
  • 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
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
  • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
  • F02B37/12—Control of the pumps
  • F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
  • F02B37/183—Arrangements of bypass valves or actuators therefor
  • F02B37/186—Arrangements of actuators or linkage for bypass valves
• • 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
  • 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 has a bearing arrangement for the mounting of a rotor shaft in a bearing housing.
• the bearing arrangement may be either in the form of a floating-bushing plain bearing arrangement or in the form of a plain bearing arrangement with non-rotating bearing bushings.
• the floating-bushing plain bearing arrangement is distinguished by the fact that the rotor shaft rotates within two bearing bushings of the bearing arrangement, and said bearing bushings in turn rotate within the bearing housing.
• Plain bearing arrangements with non-rotating bearing bushings are distinguished by the fact that the bearing bushings are fixed in the bearing housing so as to be prevented from rotating.
• a floating-bushing plain bearing arrangement in this case duly exhibits lower friction losses than a plain bearing arrangement with a non-rotating bearing bushing, but in the case of a floating-bushing plain bearing arrangement, an additional, subsynchronous vibration mode arises which may have a considerably greater amplitude than, for example, an imbalance-induced vibration.
• the exhaust-gas turbocharger according to the invention is distinguished by the fact that its bearing arrangement has a floating-bushing bearing and a non-rotating bearing bushing. This combination advantageously makes it possible for one of the subsynchronous vibrations of the exhaust-gas turbocharger to be suppressed.
• a further optimization of the bearing arrangement according to the invention can be achieved if the compressor-side bearing is the floating-bushing bearing, and the turbine-side bearing is the bearing with the non-rotating bearing bushing.
• a spacer bushing is advantageously provided between the floating-bushing bearing and the non-rotating bearing bushing.
• Claims 4 to 6 define a bearing arrangement according to the invention as an object which can be marketed independently.
• Figure 1 shows a schematic illustration of an exhaust-gas turbocharger according to the invention
• Figures 2 and 3 show frequency analyses in which amplitudes of individual frequencies are plotted against the rotational speed.
• Figure 1 shows an exhaust-gas turbocharger 1 according to the invention, which has a compressor 2 which comprises a compressor housing 2A in which a compressor wheel 2B is arranged.
• the exhaust-gas turbocharger 1 also has a turbine 3 with a turbine housing 3A and a turbine wheel 3B arranged in the turbine housing 3A.
• the compressor wheel 2B and the turbine wheel 3B are fixed to the ends of a rotor shaft 7 which is mounted by means of a bearing arrangement in a bearing housing 4 which, as indicated in the figure, is arranged between, and connected to, the compressor housing 2A and the turbine housing 3 A.
• the bearing arrangement of the exhaust-gas turbocharger 1 according to the invention has a floating-bushing bearing 5 and a non-rotating bearing bushing 6.
• the compressor- side bearing is the floating-bushing bearing 5
• the turbine-side bearing is formed by the non-rotating bearing bushing 6.
• Figure 1 illustrates that the bearing arrangement according to the invention has a spacer bushing 8 which is arranged on the rotor shaft 7 between the floating-bushing bearing 5 and the non-rotating bearing bushing 6.
• the floating-bushing bearing 5 is a bearing in which the rotor shaft 7 rotates and the floating-bushing bearing 5 in turn rotates within the bearing housing 4.
• the fixed bearing bushing 6 is secured so as to be prevented from rotating within the bearing housing 4.
• Figures 2 and 3 show diagrams (so-called waterfall diagrams) and frequency analyses in which the amplitudes of individual frequencies are plotted against the rotational speed.
• the diagrams show the radial displacement at the compressor wheel nut.
• Figure 2 shows a diagram for the radial displacement at the compressor wheel nut, said diagram showing the dominant subsynchronous vibration in the case of a floating-bushing bearing arrangement.
• Figure 3 shows a diagram for the radial displacement at the compressor wheel nut, said diagram showing the case of the combination of a floating bushing mounted at the compressor side and a non-rotating bushing mounted at the turbine side.

Landscapes

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

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=52346652

Family Applications (1)

Country Status (2)

Cited By (1)

Citations (5)

• 2014
  • 2014-07-11 DE DE112014002860.6T patent/DE112014002860T5/de not_active Ceased
  • 2014-07-11 WO PCT/US2014/046317 patent/WO2015009560A1/en active Application Filing

Patent Citations (5)

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