EP2977550B1 - Schaufel einer axialen strömungsmaschine und zugehörige strömungsmaschine - Google Patents

Schaufel einer axialen strömungsmaschine und zugehörige strömungsmaschine Download PDF

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Publication number
EP2977550B1
EP2977550B1 EP14177991.8A EP14177991A EP2977550B1 EP 2977550 B1 EP2977550 B1 EP 2977550B1 EP 14177991 A EP14177991 A EP 14177991A EP 2977550 B1 EP2977550 B1 EP 2977550B1
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EP
European Patent Office
Prior art keywords
blade
branches
vane
branch
blades
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.)
Active
Application number
EP14177991.8A
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English (en)
French (fr)
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EP2977550A1 (de
Inventor
Stéphane Hiernaux
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.)
Safran Aero Boosters SA
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Safran Aero Boosters SA
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 Safran Aero Boosters SA filed Critical Safran Aero Boosters SA
Priority to EP14177991.8A priority Critical patent/EP2977550B1/de
Priority to US14/803,818 priority patent/US9863253B2/en
Priority to CA2897929A priority patent/CA2897929A1/en
Priority to RU2015129735A priority patent/RU2693548C2/ru
Priority to CN201510434561.7A priority patent/CN105317467B/zh
Publication of EP2977550A1 publication Critical patent/EP2977550A1/de
Application granted granted Critical
Publication of EP2977550B1 publication Critical patent/EP2977550B1/de
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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
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F01D5/141—Shape, i.e. outer, aerodynamic form
    • F01D5/145—Means for influencing boundary layers or secondary circulations
    • 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
    • F01D5/14—Form or construction
    • F01D5/141—Shape, i.e. outer, aerodynamic form
    • F01D5/146—Shape, i.e. outer, aerodynamic form of blades with tandem configuration, split blades or slotted blades
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/542—Bladed diffusers
    • F04D29/544—Blade shapes
    • 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
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor

Definitions

  • the invention relates to a turbomachine blade. More specifically, the invention relates to a turbomachine blade comprising branches. The invention also relates to a blading with a row of ram blades. The invention also relates to a turbomachine comprising a blade and / or a blade according to the invention.
  • An axial turbomachine blade generally has a profiled blade extending in the flow of the turbomachine. To reduce the number of blades in a row while preserving performance, it is known to make a blade with ramifications.
  • the document FR 2 914 943 A1 discloses an axial turbomachine fan blade.
  • the blade comprises a first portion that extends from a fan hub, and a plurality of other portions that extend radially outwardly the first portion. All these portions are connected by a platform disposed at the outer end of the first portion.
  • this blade configuration has reduced rigidity.
  • the presence of the platform in the middle of the vein can disturb the flow.
  • branches are subject to vibrations and stresses that can damage the blade.
  • Dawn has a large mass. The presence of ramifications solicits the platform; its mechanical strength requires to thicken which disrupts the flow.
  • the object of the invention is to solve at least one of the problems posed by the prior art. More specifically, the invention aims to increase the stiffness of a turbine engine blade with branches. The invention also aims to stiffen a turbine engine blade with branched vanes. The invention also aims to protect the turbomachine in case of ingestion.
  • the invention relates to an axial turbomachine blade comprising: a blade extending radially and having two radially opposite ends; and a first set of branches radially extending one of the ends of the blade, remarkable in that it further comprises a second set of branches which radially extend the other of the opposite ends of the blade and which are offset one compared to others according to the circumference of the turbomachine.
  • the blade comprises a fixing support which is joined to a set of branches via the ends of the branches which are opposed radially to the blade, optionally it comprises a fixing support on each side of the blade. blade that is linked to the blade via a set of ramifications.
  • each branch of at least one set of branches at one end of the blade comprises a free edge, optionally each free edge extends from the leading edge. at the trailing edge of the corresponding branch.
  • At least one branch of the first set is superposed radially on at least one branch of the second set, said branches being connected by the blade.
  • the branches of the first game extend on each side of the blade according to its thickness and completely cover the branches of the second set.
  • the sets of branches form rows of generally parallel branches, the ramifications of each game include faces facing each other.
  • the leading edge and the trailing edge of at least one branch of the first set has the same number of distinct curved portions as the leading edge and the trailing edge of a branching of the second set arranged radially opposite.
  • the first game and the second game comprise different numbers of branches, possibly the branches of the game comprising more ramifications are connected to different radial heights.
  • the ramifications of the game having more ramifications are less thick than the ramifications of the other game.
  • the blade comprises two branches at the inner end of the blade and three branches at the outer end of the blade, the games have differences E different between their branches.
  • At least one set comprises two side branches and at least one central branch, said at least one central branch crossing the extension of the stacking curve of the profiles of the blade.
  • At least one branch extends in the radial extension of the blade, shifted according to the thickness of the blade, the branches at each end of the blade are generally inclined relative to one another. to each other or to each other.
  • the branches of at least one or each set overlap axially over the majority of their lengths L, and each branch extends axially over the majority, preferably over the entire blade, and the branches of at least one or each set are contiguous, the branches and the blade are made of material and are produced by additive manufacturing based on metal powder.
  • the radial heights of the branches differ from one game to another.
  • the developed lengths of the leading edges and the trailing edges differ within the same blade end or from one blade end to the other.
  • the angular differences between the branches differ from one game to another.
  • the branches are shifted relative to each other according to the thickness of the blade.
  • the branches are aligned along their leading edges and / or along their trailing edges.
  • the branches comprise junction edges at least partially merged so as to join said branches one over the other along the blade.
  • the junction edges of the branches are joined on the majority, preferentially over all their lengths L and / or the length of the rope of the blade.
  • the blade and / or the ramifications comprise leading edges and trailing edges, the leading edge of the blade being extended radially by the leading edges of the branches, and or the trailing edge of the blade being extended radially by the trailing edges of the branches.
  • leading edges and the trailing edges of the branches are tangent, respectively, to the leading edge and the trailing edge of the blade.
  • At least one or each branch has a height H2 greater than 5%, preferably greater than 10%, more preferably greater than 20% of the height H1 of the blade.
  • the blade is a compressor blade, possibly low pressure, or a turbine blade, or a fan blade.
  • the branches converge towards one another according to their height H2 and their length L.
  • the blade is divided according to its thickness into several branches.
  • the branches radially delimit the blade.
  • the subject of the invention is also a turbomachine comprising at least one blade, which is remarkable in that the at least one blade is in accordance with the invention, preferably the turbomachine comprises a compressor with rows of vanes, at least one or each dawn compressor according to the invention.
  • the row of blades comprises two concentric rings or two concentric ring segments and several blades extending radially between the rings, the rings being connected to each other via each set of rings.
  • the invention makes it possible to stiffen the blade. Indeed, the branching blades form an angle at the end of the joining blade where they are contiguous. The edge of the joining blade is stiffened, its mechanical strength is no longer based solely on the central portion of the joining blade. As a result, the central portion can be thinned and further optimized. Aerodynamic gain and reinforcement reduce the number of blades in a blade stage.
  • the invention makes it possible to reinforce the vane by forming junctions between the neighboring lateral branches.
  • the ferrule or the ferrule segment forms a bridge linking the ends of the ramifications within a single blade, or from a neighboring blade to another.
  • the branches are protected against vibrations that could be harmful.
  • the invention makes it possible to increase the number of blades that can intercept a body if swallowed.
  • the body can be slowed down, and eventually be cushioned or split further with the added edges. In this way the ingested bodies are reduced further upstream, which protects the downstream elements.
  • the positioning of the branches at the end of the blade makes it possible to act effectively against the fragments near the walls of the fluid veins, places where the said fragments are frequently found because of the flow dynamics and / or the inclinations of the veins.
  • the configuration in which the branches overlap axially makes it possible to form reinforcements that stiffen the blade.
  • the latter can then be thinned and lightened because it is less subject to torsion phenomena.
  • the profiles of the blade can be better adapted to the aerodynamic needs. This configuration strengthens the links between the branches, making them more resistant to ingestions.
  • inner or inner and outer or outer refer to a positioning relative to the axis of rotation of an axial turbomachine.
  • the figure 1 represents in simplified manner an axial turbomachine. It is in this case a double-flow turbojet engine.
  • the turbojet engine 2 comprises a first compression level, called a low-pressure compressor 4, a second compression level, called a high-pressure compressor 6, a combustion chamber 8 and one or more levels of turbines 10.
  • a first compression level called a low-pressure compressor 4
  • a second compression level called a high-pressure compressor 6
  • a combustion chamber 8 and one or more levels of turbines 10.
  • the different turbine stages can each be connected to the compressor stages via concentric shafts.
  • the latter comprise several rows of rotor blades associated with rows of stator vanes. The rotation of the rotor about its axis of rotation 14 thus makes it possible to generate an air flow and to compress it progressively until it reaches the combustion chamber 8.
  • An inlet fan commonly referred to as fan or blower 16 is coupled to the rotor 12 and generates an air flow which splits into a primary flow 18 passing through the various aforementioned levels of the turbomachine, and a secondary flow 20 passing through an annular duct (partially shown) along the machine to then join the primary flow at the turbine outlet.
  • the secondary stream can be accelerated to generate a reaction.
  • the primary 18 and secondary 20 streams are annular flows, they are channeled by the casing of the turbomachine.
  • the housing has cylindrical walls or ferrules which can be internal and external.
  • the turbomachine may comprise a compressor or a portion of a compressor in which the flow circulates radially. It may also include a similar turbine.
  • the blades in particular their leading edges and / or their trailing edges, can extend radially or axially.
  • the figure 2 is a sectional view of a compressor of an axial turbomachine 2 such as that of the figure 1 .
  • the compressor may be a low-pressure compressor 4.
  • the rotor 12 comprises several rows of rotor blades 24, in the occurrence three.
  • the stator vanes 26 extend essentially along their height through the flow 18, possibly radially, from an outer casing 28, and can be fixed therein with the aid of an axis possibly formed on a fixing platform.
  • the vanes (24, 26) may be individually attached to the stator or rotor 12, or may be grouped into vanes comprising a plurality of circumferentially arranged blades.
  • the blades (24, 26) can be grouped into bladed boxes, with several blades and a ferrule, or with two concentric ferrules (30, 32) between which the vanes (24, 26) extend radially.
  • a blading can be monobloc; it may have come from material, possibly through an additive manufacturing process. It can also be achieved by welding together ramifications and blades.
  • the rotor vanes 24 and / or the stator vanes 26 of the compressor may be branched. Branching configurations may vary from one row of blades to another, being branched in foot and / or at the head of the blade. The junctions 27 between the ramifications and the blades of blades are visible.
  • the figure 3 represents a blade 34 of a turbomachine according to a first embodiment of the invention.
  • the blade 34 shown is statoric, it could also be rotor.
  • a blade 34 can be understood as a surface, possibly rigid, for guiding a flowing fluid. It may be understood as a set of blades 26.
  • the blading may be and / or may comprise a row of blades, with several blades 26, forming an annular row portion.
  • the blades 26 are arranged on a wall, such as a ferrule or a ferrule portion, optionally an inner ferrule portion 32.
  • the wall or ferrule portion may have a shape of a circle or an arc.
  • Each blade 26 can rise, possibly extending radially, from the shell 32.
  • Each blade 26 comprises a blade 36 and branches 38.
  • the blade 36 can be a joining blade 36 joining the branches 38, the latter being able to be branching blades 38.
  • the branches 38 of the same blade are spaced apart from each other in the circumferential direction.
  • Each blade 36 and / or each branch 38 may have a generally sheet-like shape which may generally extend along a main plane, the sheet may be substantially curved and / or have a variable thickness.
  • a blade has a leading edge 40 and a trailing edge 42 which delimit a lower surface and an extrados surface.
  • the branches 38 may be lateral branches 38, in that they laterally deviate from the blade 36 in the direction of its thickness and / or perpendicularly to the rope of the blade 36.
  • Each branch 38 has two opposite ends according to its height, possibly radial, of the blade. One end is joined to the blade 36 and the other is joined to the ferrule 32 which forms a support.
  • the ferrule 32 and the vanes may be of material, or the ferrule may comprise openings 44 in which the ends of the branches are fixed and / or sealed.
  • the ferrule 32 may be an outer casing portion, or a rotor wall, such as a rotor drum wall.
  • the ferrule may form a circle or an angular portion of a circle such as a band of arcuate material.
  • the height of a branch 38, a blade 36, or the blade 26 may be perpendicular to the leading edge and / or the trailing edge of the blade, and / or oriented perpendicularly to the fluid.
  • the blade and the branches are intended to extend in the flow of the turbomachine.
  • the branches 38 of neighboring blades 26 are distant from each other, they allow a passage between the blades along the outer surface of the shell 32.
  • the branches of at least one or each blade form a pipe 48 which passes through the blade 26.
  • This pipe 48 is configured to accompany a flow of the turbomachine.
  • the upper ends of the blades are free, they form slices.
  • the figure 4 represents a blade 134 according to a second embodiment of the invention. This figure 4 resumes the numbering of the preceding figures for the identical or similar elements, the number being however incremented by 100.
  • the figure shows a row of blades 126, the presence of a ferrule is optional.
  • Each blade 126 is represented in the form of a curve, which may correspond to a leading edge, and / or a trailing edge, and / or to an aerodynamic blade or branch profile stacking curve.
  • the row comprises several blades 126, each with branches 138 at the same end or on the same side of the blade 136.
  • the branches 138 extend circumferentially towards the adjacent blade 126, and in particular branches. 138 neighboring blades.
  • the neighboring branches 138 of two neighboring blades 126 are contiguous, for example at a radial end of the blade, such as the end opposite to that receiving the blade.
  • blades 126 form a blade chain, with continuity of circumferential material, which are connected to each other with their branches 138.
  • the ramifications 138 or the ram blades 138 comprise contiguous or confused edges.
  • the total thickness may be less than the addition of the thicknesses of each branch.
  • a channel 150 may be understood as an elongate depression, such as a passage delimited laterally between two opposite branch walls.
  • the figure 5 represents a blade 234 according to a third embodiment of the invention. This figure 5 resumes the numbering of the preceding figures for identical or similar elements, however, the numbering is incremented by 200.
  • Blading 236 comprises a row of blades 226 with a plurality of blades forming an angular portion of an annular row.
  • the row can form a circle.
  • the blades 226 are arranged on a wall, such as a ferrule (230, 232) or a ferrule portion.
  • the wall, or portion of ferrule may have a shape of a circle or an arc.
  • the blading can be a bladed box. It may comprise at least three blades 226 each with a blade and ramifications extending the blade along the radial height of the blade.
  • the blades, including their branches, can be at a distance from one another.
  • Blading 236 comprises two ferrule segments, such as inner ferrule segment 232 and outer ferrule segment 230, which may be understood as angular sectors of tubes.
  • the segments are concentric, and define a fluid vein whose medium according to the radial height is located at the level of the blade, possibly halfway up.
  • At least one or each blade 226 may comprise two sets of branches 238, which are each joined to one end of the blade 236 and to a ferrule segment (230, 232). In this way, the segments of ferrules are connected to each other via, in order, the first sets of branches 238, blades 236, second sets of branches 238. branching is joined to the dawn and / or to a ferrule on the majority, preferentially over its entire length.
  • the sets of branches 238 of at least one blade or each blade may have numbers of different branches.
  • the games having the most branches 238 are on the same side of the blade 236.
  • the branching arrangements may vary from one neighbor game to another.
  • a game may comprise at least three branches, two circumferential side branches 238 between which at least one central branch 238 is disposed. These branches 238 can all be joined, each having a junction edge; said edges being merged.
  • at least one or each blade 226 has branches 238 which are joined at different heights of the blade 236.
  • a branch 238 may extend from another branch 238 while remaining at a distance from another branch and / or the 236. Such a branch 238 may form a crutch that stiffens the blading 234.
  • a branch 238 may extend laterally on one side of the blade 236, then on the other, or may extend only from one side of the blade 236.
  • the figure 6 represents a blade 334 according to a fourth embodiment of the invention. This figure 6 resumes the numbering of the preceding figures for the identical or similar elements, the number being however incremented by 300.
  • the vane represented is stator, alternatively it could be linked to the rotor.
  • Blading 334 includes several blade sets. Each set can form an angular portion of annular row of blades. Each set of blades comprises several blades 326, each with a blade 336 and branches 338 extending the blade 336 according to its height, possibly radial. Each dawn 326 may comprise two sets of branches. On one side radially, ramifications 338 adjacent to a set of blades 326 may be contiguous, on the other side ramifications 338 remain at a distance. The blade games can be at a distance from each other. In particular, the ramifications of a blade set can be circumferentially spaced apart from each branch 338 of a neighboring set of blades.
  • the figure 7 represents a blade 434 according to a fifth embodiment of the invention. This figure 7 resumes the numbering of the preceding figures for identical or similar elements, however the numbering is incremented by 400. Specific numbers are used for the specific elements of this embodiment.
  • Blading 434 comprises a row of blades 426 forming at least one turbomachine annular row portion.
  • the blades 426 are arranged on a wall, such as a ferrule or a ferrule portion (430, 432).
  • the wall, or portion of ferrule may have a shape of a circle or an arc.
  • the row may have a mixed arrangement of blades 426.
  • Some blades 426 may be free of branches at at least one end or at each end.
  • the number of ramifications 438 on one and the same radial side of the blade may vary between the blades 426.
  • Some, possibly all branches 438 adjacent to different blades 426 may be contiguous.
  • the branches On one radial side of the blade, the branches may form a row and / or may be joined to each other so as to form a chain of branches 438, which may also be joined to a ferrule 430 in addition to the blades 436 associated. This double junction branches stiffens the shell and thus the blade against torsional forces.
  • the figure 8 represents a blade 526 according to a sixth embodiment of the invention. This figure 8 resumes the numbering of the preceding figures for identical or similar elements, however the numbering is incremented by 500. Specific numbers are used for the elements specific to this embodiment.
  • the blade 526 may be a stator blade 526 as shown in FIG. figure 2 .
  • the blade 526 comprises a blade 536, and at least two branches 538, possibly three or more branches 538.
  • the blade 536 can be a connecting blade 536 or a main blade 536, in that its height and / or thickness is greater than that of each branching 538.
  • the joining blade 536 forms a joining portion 552, and the branches 538 form a branched portion 554, said portions being superposed according to the height.
  • the branches 538 may be branching blades 538 which are joined by the joining blade 536.
  • they may comprise joining edges which are at least partially, preferably totally, coincident, along the rope of the joining blade. .
  • the edges of junctions 556 can form ends, delimitations of the branching blades 538.
  • the joining blade 536 and the branching blades 538 are intended to be each disposed in the flow of the turbomachine.
  • the joining blade 536 is disposed in the extension of the branch blades 538 at their junction.
  • the joining blade 536 can form the junction between the branching blades 538. These can form divisions of the joining blade. They can form branches 538 separating from the joining blade at a branch.
  • the joining blade 536 can be divided into two blades of branching.
  • the branches can be anchored to each other and / or to each other.
  • the joining blade 536 and / or each branching blade 538 may comprise a leading edge 540, a trailing edge 542.
  • the joining blade and / or each branching blade may comprise a lower surface and an upper surface which extend from the leading edge 540 to the corresponding trailing edge 542.
  • the intrados surface and the extrados surface of the joining blade is tangent, possibly along its entire length, to the neighboring surfaces of the ram blades 538.
  • the joining blade 536 and / or each branching blade 538 may comprise aerodynamic profiles 558, possibly arched, which are stacked along the height, possibly radial.
  • the centers of gravity of the airfoils 558 of the joining blade 536 and / or of each branching blade 538 can describe a stacking curve 560.
  • the stacking curves 560 of the branching blades 538 can be in the radial extension, and / or axial, and or circumferential of the stacking curve 560 of the joining blade 536, possibly progressively shifting.
  • the branching blades may define between them a channel 562, possibly away from the joining blade 536.
  • the height H1 of the joining blade 536 may be greater than or equal to the height H2 of each branching blade 538.
  • leading edges 540, and / or the trailing edges 542, and / or the stacking curves 560 of each branching blade 538 may exhibit a variation, possibly an increase, and / or a reversal of curvature with respect to, respectively at the leading edge 540, and / or at the trailing edge 542, and / or at the stacking curve 560 of the joining blade 536.
  • the maximum thickness of the airfoils 558 of the joining blade 536 may be greater than the maximum thickness of the airfoils 558 of each branching blade 538.
  • the area of each airfoil 558 of the joining blade may be greater than or equal to at the surface of each aerodynamic profile of at least one or each branch.
  • the addition of the aerodynamic profile surfaces of the branches to a given height may be greater than or equal to the area of each airfoil of the blade.
  • the blade 526 comprises at least two branch blades 538, possibly three or four, or even more, at the same end.
  • the blade 526 may comprise a support 564 joined to the branching blades.
  • the support 564 is a fixing platform 564, for example provided with a fixing pin 566.
  • the branching blades 538, the joining blade 536, and possibly the support 562, may be integral. They can be made by additive manufacturing with a titanium powder.
  • At least one or each branching blade 538 may comprise parts, depending on the height of the blade, inclined relative to each other. These parts may be curved, and have variations, or inversions of curvatures. Depending on the height, the average axis of the curve 560 of at least one or each branching blade 538 is inclined relative to that of the joining blade 536. These geometries can be observed at the leading edge 540, and / or the trailing edge 542, and / or the stacking curve 560 of the profiles 558.
  • the gap E between the branch blades 538, measured opposite the joining blade 536, at their leading edges 540, or at their trailing edges 542, or at the level of the maximum width of passage is greater than the majority of the average or maximum thickness of the joining blade 536.
  • the gap E may be less than the length L of the branching blades 538, and / or less than the height H2 of the branching blades.
  • the length L may be greater than or equal to the height H2.
  • the figure 9 represents a blade 626 according to a seventh embodiment of the invention. This figure 9 resumes the numbering of the preceding figures for the identical or similar elements, however the numbering is incremented by 600. Specific numbers are used for the elements specific to this embodiment.
  • the blade 626 comprises two branched portions 654 joined by a junction portion 652.
  • the blade vane 636 of the blade 626 comprises two opposite ends 668 according to its height, for example radial ends, such as a head and a foot.
  • the joining blade 636 may comprise branching blades 638 at each of its radial ends, said branching blades forming a first set and a second set of branching blades 638, each set being joined to one of the ends 668 of the blade. junction 636.
  • the height H2 of the branching blades may vary from one set to another, and may remain lower than the height H1 of the connecting blade 636.
  • Branch blade tips may be free slices 670. They may form slices in the form of aerodynamic profiles of arched blades.
  • the ends may have fixing means such as fixing pins.
  • the ends at the same end of blade can each comprise a fastening orifice 672, the orifices 672 are optionally aligned along the row formed by the associated branching blades.
  • the figure 10 represents a blade 726 according to an eighth embodiment of the invention. This figure 10 resumes the numbering of the preceding figures for the identical or similar elements, however the numbering is incremented by 700. Specific numbers are used for the elements specific to this embodiment.
  • the blade 726 comprises a joining blade 736 with two opposite ends 768 according to the height H1, each end 768 comprising branches 738 extending the blade in the direction of the height.
  • the branches form a first set of branches at one end 768 of the blade 736, and a second set of branches 738 at the other end 768.
  • the opposite ends 768 comprise a different number of branches 738.
  • the sets of ramifications can be superimposed according to the height of the blade 726 while being separated by the blade 736.
  • One of the games can cover the other game, the recovery being on the average rope of the blade and / or according to the thickness of the blade.
  • a set of branches may be linked to a support 764, such as a fixing platform 764.
  • the set of branches on the opposite side to the support 764 may have free edges 770, and possibly fixing means 774 such as bumps 774 or asperities 774. These means may optionally be used to seal the branches to a wall, a support, or a shell.
  • the blades of the first to fifth embodiments of the invention may be according to the sixth, seventh or eighth embodiment of the invention.
  • Blading may have branches at each end, depending on the height of the blades.
  • the number of branches may be different at each of these ends.
  • the blades of the seventh and eighth embodiments may take up the configurations of the blade of the sixth embodiment; in particular all that concerns, the arrangement of the leading edges, the trailing edges, the edges of junctions, the stacking curves, the arrangement of the blades branching with respect to the joining blade.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Geometry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (15)

  1. Schaufel (226; 326; 426; 626; 726) einer axialen Turbomaschine (2), umfassend:
    - ein Blatt (236; 336; 436; 636; 736), das sich axial erstreckt und zwei radial gegenüberliegende Enden (668; 768) aufweist; und
    - einen ersten Satz von Verzweigungen (238; 338; 438; 638; 738), die eines der Enden des Blattes radial verlängern,
    dadurch gekennzeichnet, dass sie außerdem Folgendes umfasst:
    einen zweiten Satz von Verzweigungen (238; 338; 438; 638; 738), die das andere der gegenüberliegenden Enden (668; 768) des Blattes (236; 336; 436; 636; 736) verlängern und die im Verhältnis zu einander entlang des Umkreises der Turbomaschine (2) versetzt sind.
  2. Schaufel (726) nach Anspruch 1, dadurch gekennzeichnet, dass sie einen Befestigungsträger (764) umfasst, der mit einem Satz von Verzweigungen (738) anhand der Enden der Verzweigungen verbunden ist, die dem Blatt (736) radial gegenüberliegen; eventuell umfasst sie einen Befestigungsträger an jeder Seite des Blattes, der anhand eines Satzes von Verzweigungen mit dem Blatt verbunden ist.
  3. Schaufel (626; 726) nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, dass gegenüber dem Blatt (636; 736) jede Verzweigung (638; 738) von mindestens einem Satz von Verzweigungen an einem Ende (668; 768) des Blattes einen freien Abschnitt (670; 770) beinhaltet, wobei sich eventuell jeder freie Abschnitt von der Vorderkante zur Hinterkante der entsprechenden Verzweigung erstreckt.
  4. Schaufel (226; 326; 426; 626; 726) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass mindestens eine Verzweigung (238; 338; 438; 638; 738) des ersten Satzes radial mindestens eine Verzweigung des zweiten Satzes überlagert, wobei die genannten Verzweigungen durch das Blatt (236; 336; 436; 636; 736) verbunden sind.
  5. Schaufel (226; 326; 426; 626; 726) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass sich die Verzweigungen (238; 338; 438; 638; 738) des ersten Satzes beiderseits des Blattes (236; 336; 436; 636; 736) entsprechend seiner Dicke erstrecken und die Verzweigungen (238; 338; 438; 638; 738) des zweiten Satzes vollständig überdecken.
  6. Schaufel (226; 326; 426; 626; 726) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Sätze von Verzweigungen (236; 336; 436; 636; 736) Reihen von Verzweigungen (236; 336; 436; 636; 736) bilden, die allgemein parallel verlaufen, wobei die Verzweigungen (236; 336; 436; 636; 736) jedes Satzes einander gegenüberliegende Seiten aufweisen.
  7. Schaufel (226; 326; 426; 626; 726) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Vorderkante und die Hinterkante von mindestens einer Verzweigung (238; 338; 438; 638; 738) des ersten Satzes die gleiche Anzahl von getrennten gebogenen Abschnitten aufweisen, wie die Vorderkante und die Hinterkante einer Verzweigung des zweiten Satzes, die radial gegenüberliegt.
  8. Schaufel (226; 426; 726) nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der erste Satz und der zweite Satz unterschiedliche Anzahlen von Verzweigungen (238; 438; 738) aufweisen und ggf. die Verzweigungen des Satzes mit mehr Verzweigungen (238) in unterschiedlichen radialen Höhen verbunden sind.
  9. Schaufel (226; 426; 726) nach Anspruch 8, dadurch gekennzeichnet, dass die Verzweigungen (238; 438; 738) des Satzes mit mehr Verzweigungen weniger dick sind, als die Verzweigungen des anderen Satzes.
  10. Schaufel (226; 426; 726) nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass sie zwei Verzweigungen (238; 438; 738) am inneren Ende des Blattes (236; 436; 736) und drei Verzweigungen am äußeren Ende des Blattes aufweist, wobei die Sätze unterschiedliche Abstände E zwischen ihren Verzweigungen (238; 438; 738) aufweisen.
  11. Schaufel (226; 426; 726) nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass mindestens ein Satz zwei seitliche Verzweigungen (238; 438; 738) und mindestens eine zentrale Verzweigung (238; 438; 738) aufweist, wobei mindestens eine genannte zentrale Verzweigung die Verlängerung der Stapelkurve der Profile des Blattes (236; 436; 736) durchschneidet.
  12. Schaufel (226; 326; 426; 626; 726) nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass sich mindestens eine Verzweigung (238; 338; 438; 638; 738) in der radialen Verlängerung des Blattes (236; 336; 436; 636; 736) erstreckt, indem es entsprechend der Dicke des Blattes (236; 336; 436; 636; 736) versetzt ist, wobei die Verzweigungen jedes Endes (668; 768) des Blattes im Allgemeinen im Verhältnis zueinander geneigt sind.
  13. Schaufel (226; 326; 426; 626; 726) nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass die Verzweigungen (238; 338; 438; 638; 738) von mindestens einem Satz oder jedes der Sätze axial die Mehrzahl ihrer Längen L überlappen und sich jede Verzweigung (238; 338; 438; 638; 738) axial über den größten Teil des Blattes, vorzugsweise über das gesamte Blatt (236; 336; 436; 636; 736) erstreckt und die Verzweigungen von mindestens einem Satz oder jedes Satzes aneinanderliegen, wobei die Verzweigungen und das Blatt aus demselben Material bestehen und durch additive Herstellung auf der Basis von Metallpulver ausgeführt werden.
  14. Turbomaschine (2) mit mindestens einer Schaufel, dadurch gekennzeichnet, dass die mindestens eine Schaufel (226; 326; 426; 626; 726) einem der Ansprüche 1 bis 13 entspricht, wobei die Turbomaschine (2) vorzugsweise einen Kompressor (4; 6) mit Reihen von Schaufeln beinhaltet, wobei mindestens eine oder jede Schaufel (226; 326; 426; 626; 726) des Kompressors einem der Ansprüche 1 bis 13 entspricht.
  15. Turbomaschine (2) nach Anspruch 14, dadurch gekennzeichnet, dass die Reihen von Schaufeln (236; 336; 436) zwei konzentrische Mantelringe oder zwei konzentrische Mantelringsegmente (230; 232; 330; 332; 430; 432) und mehrere Schaufeln (226; 426; 726) aufweisen, die sich radial zwischen den Mantelringen erstrecken, wobei die Mantelringe anhand jedes Satzes von Verzweigungen (238; 338; 438) miteinander verbunden sind.
EP14177991.8A 2014-07-22 2014-07-22 Schaufel einer axialen strömungsmaschine und zugehörige strömungsmaschine Active EP2977550B1 (de)

Priority Applications (5)

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EP14177991.8A EP2977550B1 (de) 2014-07-22 2014-07-22 Schaufel einer axialen strömungsmaschine und zugehörige strömungsmaschine
US14/803,818 US9863253B2 (en) 2014-07-22 2015-07-20 Axial turbomachine compressor blade with branches at the base and at the head of the blade
CA2897929A CA2897929A1 (en) 2014-07-22 2015-07-20 Axial turbomachine compressor blade with branches at the base and at the head of the blade
RU2015129735A RU2693548C2 (ru) 2014-07-22 2015-07-21 Лопатка компрессора осевой турбомашины с ответвлениями у основания и на вершине лопатки и турбомашина, содержащая указанную лопатку
CN201510434561.7A CN105317467B (zh) 2014-07-22 2015-07-22 在叶片的底部和头部具有分支的轴向涡轮机组压缩机叶片

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EP14177991.8A EP2977550B1 (de) 2014-07-22 2014-07-22 Schaufel einer axialen strömungsmaschine und zugehörige strömungsmaschine

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CA3119231A1 (en) * 2020-05-22 2021-11-22 Immeubles Mfp 1006 Inc. Blower impeller

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DE2515444B2 (de) * 1975-04-09 1977-05-18 Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg Laufschaufelkranz grosser umfangsgeschwindigkeit fuer thermische, axial durchstroemte turbinen
DE3105183C2 (de) * 1981-02-13 1986-09-25 Günther 2000 Hamburg Spranger Einrichtung zur Verminderung des Strömungswiderstandes von von Gasen wie Luft oder dergl. umströmten Flügeln
GB2106193A (en) * 1981-09-24 1983-04-07 Rolls Royce Turbomachine rotor blade
ES2035127T3 (es) * 1987-03-13 1993-04-16 Gunter Spranger Dispositivo perfilado en forma de aleta, que actua sobre un fluido liquido o gaseoso que fluye a su alrededor y que presenta aletas perfiladas en forma de tira para la mejora de la eficacia.
DE19931035A1 (de) * 1999-07-06 2001-01-25 Rudolf Bannasch Rotor mit gespaltenem Rotorblatt
EP1365106B1 (de) * 2001-01-26 2009-08-05 Minoru Yoshida Strömungsmaschine
US6910854B2 (en) * 2002-10-08 2005-06-28 United Technologies Corporation Leak resistant vane cluster
ITBA20030052A1 (it) * 2003-10-17 2005-04-18 Paolo Pietricola Pale rotoriche e statoriche a profili multipli
US7396208B1 (en) * 2005-02-15 2008-07-08 Hussain Mahmood H Divided blade rotor
FR2914943B1 (fr) * 2007-04-13 2011-04-01 Snecma Aube de soufflante
FR2981602B1 (fr) * 2011-10-25 2017-02-17 Snecma Propulsion Solide Procede de fabrication d'un secteur de distributeur de turbine ou redresseur de compresseur en materiau composite pour turbomachine et turbine ou compresseur incorporant un distributeur ou un redresseur forme de tels secteurs
CN104870153B (zh) * 2012-11-13 2018-03-13 斯内克马公司 整体式桨叶预制件和用于涡轮机中间壳体的模块

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CN105317467B (zh) 2018-02-09
RU2015129735A (ru) 2017-01-27
EP2977550A1 (de) 2016-01-27
RU2015129735A3 (de) 2018-12-20
CA2897929A1 (en) 2016-01-22
RU2693548C2 (ru) 2019-07-03
US20160024932A1 (en) 2016-01-28
CN105317467A (zh) 2016-02-10

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