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
  • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
  • F01D11/08—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
  • F01D11/12—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator using a rubstrip, e.g. erodible. deformable or resiliently-biased part
  • F01D11/122—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator using a rubstrip, e.g. erodible. deformable or resiliently-biased part with erodable or abradable material
• • 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
  • F05D2250/00—Geometry
  • F05D2250/10—Two-dimensional
  • F05D2250/18—Two-dimensional patterned
  • F05D2250/181—Two-dimensional patterned ridged
• • 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
  • F05D2250/10—Two-dimensional
  • F05D2250/18—Two-dimensional patterned
  • F05D2250/182—Two-dimensional patterned crenellated, notched
• • 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
  • F05D2250/10—Two-dimensional
  • F05D2250/18—Two-dimensional patterned
  • F05D2250/183—Two-dimensional patterned zigzag
• • 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
  • F05D2250/20—Three-dimensional
  • F05D2250/29—Three-dimensional machined; miscellaneous
  • F05D2250/294—Three-dimensional machined; miscellaneous grooved

Definitions

• the invention relates to a turbine in the preamble of claim 1
• the publication DE 696 04 154 T2 discloses a turbine, with a flow-through exhaust gas guide section and a turbine wheel rotatably received in the exhaust gas guide section.
• the exhaust gas guide section has a sectionally differently shaped channel for the flow through. In a section of the duct, this section is for receiving the turbine wheel as a wheel chamber
• This wheel chamber has a Radschwandung. Between this Radschwandung and the turbine wheel radially enveloping envelope a gap is formed. This gap serves to avoid contact of the turbine wheel and the wall of the wheel chamber during operation of the turbine.
• the solution in the present disclosure is the attachment of an abradable seal. This means that before the first operation of the turbine, the gap is almost absent. Already with the first commissioning, however, the seal is worn down so far that a more or less contact-free position between the
• Turbine and the wheel chamber is formed.
• the problem here is, however, that although a very small gap can be formed, which can realize a high efficiency corresponding to the turbine, but this gap is not maintained over the life of the turbine.
• sealing material is subject to aging, which does not correspond to aging of the exhaust gas guide section and, secondly, that the sealing material is not specifically abradable. That is, it is too partial Breaking out of sealing material may occur, whereby a strong loss of efficiency in operation occurs.
• the aging of the sealing material is also at a significant rate on large
• the object of the present invention is to provide a turbine which has a high efficiency over the entire life of the turbine.
• the invention proposes a Radcrowandung a wheel chamber of an exhaust gas guide section of the turbine at least in the region of a gap, which is rotatable between one in the wheel chamber recorded turbine wheel and the Radcrowandung exists to design with a tooth-like contour, wherein the contour of the Radcrowandung is formed in an extension direction of a rotation axis of the turbine wheel.
• Material having formed, but formed integrally with the wheel chamber is.
• This one-piece design can by chipless or machined
• Forming be brought about, for example, directly in the casting process using a corresponding mold or for example by means of a milling process.
• the Radcrowandung subject with their tooth-like contour the same aging conditions, which the exhaust gas guide section and
• Another advantage of this invention is in particular in a tooth-like contour having a plurality of teeth that a quasi labyrinth seal similar seal between the overflow and the outlet channel is caused by the successively arranged in the flow direction teeth, resulting in a further increase in efficiency the turbine contributes.
• a turbine is formed, which has a high efficiency and high durability.
• a filler material is provided, which is arranged between juxtaposed teeth of the contour.
• the efficiency can be additionally increased, wherein the filler, in particular formed of calcium carbonate, in a possible solid state contact does not have the tendency of seizure, but at a friction of the turbine wheel on the Radhuntwandung should have a rising or falling tendency to prevent prolonged solid contact.
• this has an adjustable nozzle with a contour sleeve, wherein the Radcrowandung corresponds to a contour sleeve wall of the contour sleeve.
• the contour sleeve can be produced as an individual component, that is to say independently of the exhaust gas guide section, and thus has easier handling, since it is a much smaller component. In general, however, also non-cutting or machining methods can be used here.
• Embodiment principles have a contour sleeve whose Konturhülsenwandung, or the contour of the sleeve wall corresponding Radcrowandung, which may have tooth-like contour, to increase the efficiency of the turbine.
• the invention also relates to an exhaust gas turbocharger with a compressor and such a turbine.
• Turbine efficiency characterized by an increased overall efficiency over almost the entire life of the exhaust gas turbocharger.
• Exhaust gas turbocharger according to the invention is particularly effective and fuel-reducing an internal combustion engine operable.
• FIG. 1 shows a longitudinal section of an exhaust gas guide section of a turbine of a
• FIG. Fig. 1 shows a detail of the exhaust gas guide section according to FIG. Fig. 1,
• Fig. 3 shows a detail of an exhaust gas guide portion of an inventive
• FIG. 4 shows the detail gem.
• Fig. 3 with possible contact areas between a turbine wheel of the turbine according to the invention and a Radhuntwandung the turbine of the invention and
• FIG. Fig. 3 shows a detail of the exhaust gas guide section according to FIG. Fig. 3 with a
• a turbine 2 of an exhaust gas turbocharger 1 of the prior art is constructed as shown in FIG.
• the exhaust gas turbocharger 1 has a flow-through exhaust gas guide section 3 of the turbine 2, which flows through a fluid, usually of exhaust gas of an internal combustion engine, not shown, to which the exhaust gas turbocharger 1 is connected.
• the turbine wheel 5, comprising an axis of rotation 6 and on a hub 7 of the turbine wheel 5 immovably arranged paddles 8, by means of a shaft 9 rotatably with a compressor wheel, not shown connected, which is rotatably connected in a non-illustrated wheel chamber of a non-illustrated through-flow air guide portion.
• the turbine wheel 5 is acted upon by exhaust gas, wherein the turbine wheel 5 a
• Rotational movement exerts, and this rotational movement is transmitted by means of the rotationally fixed connection with the compressor wheel not shown on this, so that the compressor not shown, fresh air can suck in, which in the not shown air duct section is compressed.
• the exhaust gas guide section 3 has a spiral channel 10 upstream of the wheel chamber 4. For flow through the exhaust gas guide section 3, this upstream of the spiral channel 10 an inlet channel, not shown, downstream of the spiral channel 10 an overflow channel 11 and a downstream of the wheel chamber 4 formed outlet channel 12. Overall, therefore, the exhaust gas guide section 3 for
• the wheel chamber 4 has a Radschwandung 13, which is formed opposite the turbine wheel 5. Between the wheel chamber wall 13 and an enveloping surface 4 of the turbine wheel 5, a gap 15 is formed in the area of the vanes 8 encompassed by the enveloping surface 14. This gap 15 serves to avoid a solid friction between the turbine wheel 5 and the Radhuntwandung 13. To avoid the solid friction of the gap 15 is to be formed as large as possible, whereas it should be designed to achieve a high efficiency of the turbine 2 as small as possible.
• an adjustable nozzle 16 is arranged for conditioning the exhaust gas.
• the adjustable nozzle 16 is formed on a Leitgitterring 18 mounted grid blades 17 having formed, wherein the grid blades 17 are arranged rotatably in the overflow 11. Each of them is twistable
• the adjustable guide apparatus 16 has a contoured sleeve 21, which is arranged opposite the guide-grid ring 18 and in this embodiment serves to mount the blade shaft 19.
• the Radschwandung 13 is formed by means of the contour sleeve 21, so that a turbine wheel 5 facing positioned Konturhülsenwandung 22 of
• Radschwandung 13 corresponds. Likewise, however, the turbine could also be designed as a turbine without an adjustable nozzle. Then it would be common the Radcrowandung 13 a wall which is formed with the exhaust gas guide portion 3 itself.
• a section of the exhaust gas guide section 3 gem.
• Fig. 1 shown. 3 shows a section of the exhaust gas guide section 3 of a turbine 2 according to the invention.
• Contour sleeve wall 22 is formed, has in a longitudinal section along the
• Rotary axis 6 a tooth-like contour 23 with teeth 24.
• the tooth-like contour 23 is predominantly formed in a region of the contour sleeve wall 22, which are opposite the wheel vanes 8 of the turbine wheel 5.
• the tooth-like contour 23 is formed predominantly in the region of the gap 15.
• a filling material 26 is provided between adjacent teeth 24 of the contour 23, which advantageously from
• FIG. 5 shows a schematic representation of a production method for producing the tooth-like contour 23 of the wheel chamber wall 13 with the aid of a tool 27, for example in the form of a turning tool.
• the tooth-like contour 23 is introduced into the Radcrowandung 13, for example by means of a process, the so-called sizing.
• Radcrowandung 13 is then dependent on a cutting geometry, a delivery and a feed rate.
• the tooth-like contour 23 may also be formed in the form of a so-called “honeycomb” structure, wherein this "honeycomb” structure is preferably introduced by means of an erosion process.

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=48700525

Family Applications (1)

Country Status (2)

Cited By (1)

Citations (14)

Family Cites Families (3)

• 2012
  • 2012-07-06 DE DE201210106090 patent/DE102012106090A1/de not_active Withdrawn
• 2013
  • 2013-06-25 WO PCT/EP2013/001862 patent/WO2014005678A1/fr not_active Ceased

Patent Citations (14)

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