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
  • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
  • F01D5/3007—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type
• • 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
  • F01D5/26—Antivibration means not restricted to blade form or construction or to blade-to-blade connections or to the use of particular materials
• • 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
  • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
  • F01D5/284—Selection of ceramic materials
• • 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
  • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
  • F01D5/3084—Fixing blades to rotors; Blade roots ; Blade spacers the blades being made of ceramics
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T50/00—Aeronautics or air transport
  • Y02T50/60—Efficient propulsion technologies, e.g. for aircraft

Definitions

• the two faces are plane, one being oriented radially and the second making an angle less than or equal to 30 ° with the radial direction.
• the turbine disc further comprises a clamping piece comprising two planar or cylindrical faces whose direction of the generatrices is oriented respectively parallel to each of the two cylindrical faces of the attachment means, said part being positioned in abutment against one of the planar faces. or cylindrical of said hooking means.
• FIG. 2 is a detail view of FIG. Referring to Figure 1, we see the upper part of a turbine disk 1 which is separated into two half-disks, referenced 1a upstream and 1b downstream with reference to the direction of circulation of gas in the vein of the turbomachine. For reasons of legibility of the figure, only the upper trace of the half-disk downstream 1b is shown. Between the upper parts of the two half-disks axially extend spars 2, in the form of bridges, which connect the radial faces of the half-disks together and which transmit to them the retention forces of the turbine blades mounted on the disc 1 .
• the number of longitudinal members 2 is equal to the number of blades 3 which are mounted on the disk, each blade taking place between two consecutive longitudinal members 2.
• These spars have, in radial section, the shape of an H, without this form being imperative, the important being however, its shape has two lateral faces whose specific orientation will be described in more detail in relation to FIG. 2.
• FIG. 2 also shows, in section, an annular piece with a V-shaped section forming a spring 6 for holding the clamping piece 5 in pressure against, on one side, the radial branch 34 of the root of the blade, and on the other hand, the inclined face 25 of the spar 2.
• the disk 1 thus has a series of longitudinal members 2 which are carried by the two half-disks 1a and 1b and which have a free space at their lower part.
• the operator first installs the spring 6 by passing it through the space between two adjacent longitudinal members 2 and coming to place the axial end of the branch of the innermost V, inside the central bore of the spar 2 which adjoins the dawn to climb. It likewise passes the clamping piece 5 into this space and presses it, by its internal face, against the second leg V of the spring 6. Then while pushing the clamping piece 5 downwards, compressing the spring , which removes it from the previous spar 2, it introduces the foot 33 of the blade to be mounted in the same space, until the hook 35 of the lower part of the foot 33 of the blade is passed under the radial arm 24 of the spar. The blade is then positioned radially by its hook and can no longer escape upwards.
• the invention has been described with a flat face for the radial portion 34 of the foot on which the clamping piece 5 slides. It is obvious that the invention can also be made with a non-planar face for the part of the foot. contact with the clamping piece, provided that said clamping piece has a face that can cooperate with it in a sliding outwardly of the disc.
• any cylindrical surface whose direction generatrix is oriented towards said platform allows to achieve the invention, since it allows the sliding of a clamping piece to the shape adapted, under the action of the centrifugal force which is exerted on said blade in operation on a turbomachine.
• the inclined face 25 of the spar 2 which may have a cylindrical face whose direction of the generatrices is oriented at an angle less than 45 ° with respect to the radial direction.
• Such an angle is considered still low enough to allow the sliding of a clamping piece to the appropriate shape, on said inclined cylindrical face under the action of the centrifugal force exerted on said blade in operation on a turbomachine.
• the angle at the top of the corner constituting the clamping piece 5 is around 30 ° so that the clamping piece provides a sufficient support force, without the displacement of the wedge along the faces of the parts. that it blocks too much.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Ceramic Engineering (AREA)
• Materials Engineering (AREA)
• Turbine Rotor Nozzle Sealing (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)

Priority Applications (7)

Applications Claiming Priority (2)

Publications (2)

Family

ID=48237017

Family Applications (1)

Country Status (9)

Families Citing this family (5)

Citations (5)

Family Cites Families (11)

• 2012
  • 2012-09-28 FR FR1259175A patent/FR2996251B1/fr active Active
• 2013
  • 2013-09-26 US US14/431,294 patent/US10227881B2/en active Active
  • 2013-09-26 BR BR112015006761-1A patent/BR112015006761B1/pt active IP Right Grant
  • 2013-09-26 RU RU2015112654A patent/RU2664752C2/ru active
  • 2013-09-26 CA CA2886305A patent/CA2886305C/fr active Active
  • 2013-09-26 CN CN201380051117.6A patent/CN104685162B/zh active Active
  • 2013-09-26 EP EP13785489.9A patent/EP2900927B2/fr active Active
  • 2013-09-26 JP JP2015533672A patent/JP6246814B2/ja active Active
  • 2013-09-26 WO PCT/FR2013/052278 patent/WO2014049280A2/fr not_active Ceased

Patent Citations (5)

Also Published As

Similar Documents

Legal Events