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
  • F01D5/06—Rotors for more than one axial stage, e.g. of drum or multiple disc type; Details thereof, e.g. shafts, shaft connections
  • F01D5/066—Connecting means for joining rotor-discs or rotor-elements together, e.g. by a central bolt, by clamps
• • 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
  • F01D11/001—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between stator blade and rotor
• • 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
  • F01D5/025—Fixing blade carrying members on shafts
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/08—Sealings
  • F04D29/083—Sealings especially adapted for elastic fluid pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/08—Sealings
  • F04D29/16—Sealings between pressure and suction sides
  • F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/58—Cooling; Heating; Diminishing heat transfer
  • F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
  • F04D29/584—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps cooling or heating the machine
• • 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
  • F16D1/02—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like
  • F16D1/033—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like by clamping together two faces perpendicular to the axis of rotation, e.g. with bolted flanges
• • 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
  • F05D2260/00—Function
  • F05D2260/40—Transmission of power
  • F05D2260/403—Transmission of power through the shape of the drive components
  • F05D2260/4031—Transmission of power through the shape of the drive components as in toothed gearing
• • 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
  • F16D11/00—Clutches in which the members have interengaging parts
  • F16D2011/008—Clutches in which the members have interengaging parts characterised by the form of the teeth forming the inter-engaging parts; Details of shape or structure of these teeth
• • 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
  • F16D2300/00—Special features for couplings or clutches
  • F16D2300/02—Overheat protection, i.e. means for protection against overheating
  • F16D2300/021—Cooling features not provided for in group F16D13/72 or F16D25/123, e.g. heat transfer details

Definitions

• the invention relates to a method for protecting the passage of air in a coupling between motive parts of turbomachines - such as centrifugal compressor wheels, axial compressors or turbine wheels - in an unsecured environment.
• the environment of a device is called “unsecure” if it is able to create, under abnormal operating conditions of the device (also called failure case), obstructions of said passage and / or damage parts motor by displacement or detachment of elements, in particular protection elements secured to the annular parts of parts in general by hooping.
• the present invention also relates to the coupling adapted to implement this method, as well as turbomachine transmission shafts or lines rotor equipped with such couplings.
• the invention relates to toothed coupling mechanisms for the assembly of rotating engine parts in the engines, such as centrifugal compressors, turbine wheels or couplings in the rotor or transmission lines in the turbomachines. These parts are subject to high stresses while ensuring a circulation of air necessary for secondary air flows.
• the wheels or the wheels of compressors or turbomachine turbine wheels can be equipped with annular protection elements, for example thermal protection, or junction between rotors and stators.
• These protective parts take the form of sleeves, plates or ring seals. These parts are usually fretted on the faces of the rotors (wheels or wheels) to protect.
• the sleeve 16 or the seal 19 obstruct the passage section of the secondary air flow Fs, resulting in degradation or even a loss of functions ensured by this secondary air flow, for example pressurization, cooling, sealing, etc.
• the tabs 18 protrude substantially from the face facing the impeller 12, which creates a problem of handling of the entire wheel 12 and its sleeve 16, for example when laying this assembly in support on the tongues on a flat conveying surface or when docking this assembly on the wheel 14: the tongues can then be degraded or injure critical areas by driving the sleeve into the wheel.
• the pieces released 16 and 19 respectively hit and injure the wheels 14 and 12.
• the seal 19 comes into contact with a zone 13 of critical curvature of the impeller 12 for its life. A start of crack can be formed and a possible consequence is the bursting of room after propagation of the creek.
• the invention aims to avoid these problems of obstruction of the air passages of the secondary air system in the curvics coupling type between engine parts and potential damage to these engine parts, providing for forming axial stops by the toothed crowns of the curvic couplings.
• the invention relates to a method of protecting air passage in a gear coupling right between rotors of driving parts associated with fretted elements.
• the coupling causes the rotating parts about a central axis by mutual gearing ends of these parts, while allowing air to pass.
• one end of the coupling is extended radially at least partially with respect to the other, so as to form at least one external or internal extension facing a member enveloping the driving piece mounted on the other end.
• the terms "external” and “internal” qualify the extreme peripheries - referring to a circular element extending radially with respect to the central axis - respectively localized nearest and farthest from the central axis.
• the present solution eliminates the presence of protection tab which facilitates the handling of the wheel and the docking between the rotors.
• the invention also relates to the right gear coupling between rotors of driving parts of a turbomachine implementing the method.
• This coupling comprises two crowns of teeth, each ring being at the end of a driving part and meshing with the other to impart to it a drive in rotation around a central axis while allowing air to pass between the grooves.
• female portions and the ends of the male portions of the teeth More specifically, the coupling comprises at least one ring that is radially extended at least partially relative to the other, so as to form at least one external extension or an inner ring extension respectively facing an element enveloping the driving piece mounted on the other crown.
• Each ring has at least one extension, the extensions being external (s) and internal (s);
• a ring has an external extension and the other ring has an internal extension
• the ring gear in extension of a driving part is secured to a protective sleeve which has axial tongues length substantially equal to or greater than the axial depth of air passage at the grooves between male and female parts of the teeth;
• the invention also relates to the line of shafts or line rotors of a turbomachine comprising turbines for converting energy from combustion and air compressors for combustion, the line rotors transmitting the fuel. energy supplied by the turbines to the compressors.
• the rotor line comprises an appropriate number of curvic couplings between two rotors of compressors and turbines of the turbomachine.
• FIG. 1 is a schematic partial sectional view of a coupling according to the prior art of compressor wheels in a turbomachine (already commented);
• FIG. 4 and 4a an external perspective view of the coupling between two turbomachine rotors comprising a coupling according to Figure 2, and an enlarged partial view, highlighting the positioning between a labyrinth seal and the toothed crown in extension opposite which can serve as a stop at this joint, and
• the wheels 12 and 14 are provided with fins 12a and 14a, also called blades or blades, and are intermeshed by a coupling 20 according to the invention comprising two toothed crowns. These rings respectively have an external extension 22e and an internal extension 24i with respect to the central axis X'X. This coupling will be described more precisely with reference to FIG.
• the sleeve 16 is shrunk on a portion of the inner cylindrical wall of the wheel 12 and on the neck 12b of the wheel which forms the ring gear at its end.
• the cylindrical necks facing 12b and 14b, on which are formed the ring gear 22 and 24, have a substantially identical radial thickness but a reduction of extreme diameters, both internal and external, for a wheel 14 relative to the other wheel 12.
• the teeth of the crowns come to mesh in support on a common height H sufficient to achieve a gear sufficiently reliable, given the technological constraints and operating conditions.
• the coupling 20 between the rings then results in a corresponding radial reduction of the rings, so that the outer periphery of the ring gear of the wheel 12 is radially outgrowth 22e relative to the ring gear 14, and that the inner periphery of the wheel another ring is in radial internal protrusion 24i relative to the first.
• FIG. 2a shows the hatched support area Za between the teeth of the rings 22 and 24 as well as the secondary air flow F between the arrows F1 and between the arrows F2 in this figure.
• This flow F centripetal in the illustrated example, passes out of the support zones Za. More precisely as it appears in the upper view of FIG. 3, the flow F passes between, on the one hand, the throat bottoms G2 and G4 of the female parts of the teeth D2 and D4 of the toothed rings 22 or 24 and, of on the other hand, the ends M4 and M2 of the male parts of the teeth facing the other ring, respectively 24 or 22.
• the distance between the bottoms of the groove and the opposite ends of teeth is hereinafter referred to as ⁇ , corresponding to the flow section F1 and F2.
• This upper view also has an end portion of the labyrinth seal 19
• Tongues 18 of the state of the art have been sectioned so that their remaining length is at least equal to the axial distance ⁇ corresponding to the flow section F1 (see Figure 3). ).
• the air flow is not substantially disturbed: the spaces E between the tabs 18r pass the F2 part of the flow and the F1 part of the flow is preserved in the internal extension 24i of the crown 24.
• the discontinuity of the residual tongues 18r provides the space E created between a tongue 18r, the following tongue (not represented) and the end of the sleeve 16
• the invention is not limited to the embodiment described and shown.
• the crowns have teeth of different configuration, both in their shape and by their axial or radial depth.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)
• Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
• Turbine Rotor Nozzle Sealing (AREA)

Priority Applications (9)

Applications Claiming Priority (2)

Publications (1)

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ID=42169305

Family Applications (1)

Country Status (11)

Cited By (1)

Families Citing this family (18)

Citations (6)

Family Cites Families (9)

• 2009
  • 2009-10-30 FR FR0957653A patent/FR2952138B1/fr active Active
• 2010
  • 2010-10-13 PL PL10785110T patent/PL2494152T3/pl unknown
  • 2010-10-13 WO PCT/FR2010/052170 patent/WO2011051592A1/fr not_active Ceased
  • 2010-10-13 CA CA2777253A patent/CA2777253C/fr active Active
  • 2010-10-13 EP EP10785110.7A patent/EP2494152B1/fr active Active
  • 2010-10-13 US US13/502,471 patent/US9103212B2/en active Active
  • 2010-10-13 KR KR1020127011216A patent/KR101724174B1/ko not_active Expired - Fee Related
  • 2010-10-13 CN CN201080049774.3A patent/CN102597425B/zh active Active
  • 2010-10-13 RU RU2012122202/06A patent/RU2556148C2/ru not_active IP Right Cessation
  • 2010-10-13 IN IN3301DEN2012 patent/IN2012DN03301A/en unknown
  • 2010-10-13 JP JP2012535897A patent/JP5671049B2/ja not_active Expired - Fee Related

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