• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A blade for a turbomachine impeller having a foot, a blade, and a heel. The foot and the heel comprise platforms having surfaces (15) on the side of the blade, respectively called foot vein and heel. Each of these veins is constituted by a portion of intrados and an extrados portion, located on the side respectively of the intrados and extrados and separated by a peak curve (45,65). The manufacture of dawn is facilitated thanks to the fact that any point of a first surface of the intrados and extrados and any point of the parts of the foot and heel veins located on the side of the first surface has a normal forming an acute angle or right relative to a direction said first direction of manufacture. Method for modeling dawn
    公开号:FR3014941A1
    申请号:FR1362899
    申请日:2013-12-18
    公开日:2015-06-19
    发明作者:Sami Benichou；Christian Bariaud；Stephanie Deflandre；Brou De Cuissart Sebastien Digard；Patrick Emilien Paul Emile Huchin
    申请人:SNECMA SAS；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a blade for a turbomachine blade wheel; the dawn successively comprising, in a radial direction of the wheel, a foot, a blade, and a heel; the foot comprising a foot platform having a surface, said foot vein, on the side of the blade; the heel comprising a heel platform having a surface, said heel vein, on the side of the blade; the blade having an outer surface said blade surface having a lower surface and an upper surface. The term "vein" thus designates here the surface of a platform of the dawn which is on the side of the blade. Such a blade may be provided to be part of a moving impeller, which receives energy from the flow of fluid passing through it, or which communicates energy to this flow; it can also be part of a fixed impeller whose role is to channel the flow.
    [0002] Such a dawn with both a heel platform and a foot platform is a piece of complex shape. Its manufacture is relatively difficult, and most often requires the use of molds or tools with multiple parts, and / or possibly the use of five-axis machining centers.
    [0003] The object of the invention is therefore to overcome these disadvantages and to propose blades whose manufacture is simplified or facilitated compared to traditional blades. This objective is achieved, in a dawn of the type presented in the introduction, by the fact that each of said veins is constituted by a portion of intrados on the side of the intrados and an extrados part on the extrados side, separated by a peak curve from an upstream edge to a downstream edge of the vein through the blade; and that any point of a first surface among the intrados and extrados and any point of said portions of the foot and heel veins located on the side of the first surface, said first portions, has a normal forming an acute or right angle relative to a direction said first direction of manufacture. The fact that the intrados part is on the intrados side and the extrados part is on the extrados side means that the intrados part comprises at least the vein portion located opposite the intrados and the extrados portion comprises at least the portion of vein located opposite the extrados. The ridge line on the other hand generally extends substantially from the leading edge of the blade, to a point at the upstream edge of the platform which is substantially to the right of the leading edge of the blade; and similarly, the ridge line generally extends substantially from the trailing edge of the blade, to a point at the downstream edge of the platform which is substantially to the right of the trailing edge of the blade.
    [0004] On the other hand, the fact that a point of a surface has a normal forming an acute or straight angle with respect to a direction of manufacture means that at this point the surface does not have an undercut vis-à-vis -vis of the manufacturing direction considered. As a result, the foregoing definition implies that the first surface, and the vein tabs on the side thereof (first vein portions) have no undercut relative to the first manufacturing direction. With this, all the part of the blade which is delimited by these surfaces can be achieved in a relatively simple manner.
    [0005] Preferably, in addition any point on the second surface of the blade, other than the first surface, and any point of the foot and heel vein portions on the side of the second surface has a normal forming an acute or right angle by report to a direction said second direction of manufacture.
    [0006] Because of this, the blade can be manufactured in a relatively simple manner since the surface of the blade has a first portion on the side of the first surface whose surfaces do not have an undercut relative to the first direction. of manufacture, and a second portion on the side of the second surface whose surfaces do not have an undercut relative to the second manufacturing direction. Thus, achieving these two parts is relatively easy. However, it follows from the design of the blade that the vein generally has a discontinuity of slope on both sides of the peak curve.
    [0007] However, a part of the peak curve is located inside the blade: it follows that part of this discontinuity does not occur on the veins themselves and does not disturb the flow of fluid at the platform surfaces. Conversely outside the blade, this embodiment can have the consequence that the foot platform and / or the heel platform has an edge or rather possibly two edge portions, one upstream of the blade, and the other downstream of the blade. These ridges constitute the upstream and downstream portions of the peak curve separating the vein into a portion of the intrados and an extrados portion. The upstream edge then extends from the blade (in general, from the leading edge of the blade) to the upstream edge of the platform in question; the downstream edge 5 extends from the blade (trailing edge) to the downstream edge of the platform in question. The crest curve quoted above and which separates the vein parts (heel or foot) located on the side respectively of the intrados and extrados, follows these edges of intrados and extrados. Advantageously, it has been found that the presence of ridges upstream of the leading edge of the blade, or downstream from the trailing edge thereof, does not substantially degrade the performance of the blade. To simplify the manufacture of the blades, preferably the first and the second manufacturing direction are, in radial view, parallel in opposite directions. On the other hand, to simplify the manufacture of the blades, preferably the first and second manufacturing direction are symmetrical with respect to a median plane of the blade (Par 'median plane of the blade', here denotes a neighboring plane d 'an average plane of the blade). Furthermore, the manufacture of the blade is facilitated when a large part of the surface of the vein has sufficient draft relative to the intended manufacturing direction for the surface considered. Conversely, the clearance on the vein should preferably remain as low as possible so as not to disturb the aerodynamic flow of the fluid in the vicinity of the vein. In order to reconcile these requirements optimally, in one embodiment on a part of the axial extent of the blade, or even over the entire axial extent of the blade, a section of the underside portion and / or the extrados portion of one of said veins in a plane containing a radial direction for the blade and the first manufacturing direction is constituted by a line segment. The blade is intended to be integrated with a turbine engine blade wheel having a predetermined number of blades, denoted N. In one embodiment, the edge defining the vein of a platform (called the "first platform"; may be the platform of foot or heel) of the intrados side is substantially confused with the edge defining the vein of the first platform of the extrados side, at a rotation of 360 / near 360 °. (The same layout can be adopted for the other platform, if the dawn has two platforms). Advantageously, when two blades of this type are placed next to each other (a first and a second blade), in the same position as when they are assembled in the impeller, the discontinuity of slope between the first platform on the side of the intrados of the first blade, and the first platform on the side of the upper surface of the second blade, at the interface between the two blades, occurs in the hollow formed at the interface between the two blades. As this area is recessed, the slope discontinuity at this location does not excessively disturb the flow of fluid between the vanes, and does not unacceptably reduce the performance of the impeller. The invention also relates to a paddle wheel, comprising a plurality of blades as defined above, as well as a turbomachine, in particular a low-pressure turbine, comprising such a paddle wheel. A second object of the invention is to provide a method of modeling a blade successively comprising a foot, a blade, and a heel, an outer surface of the blade being constituted by an upper surface and a lower surface, making it possible to define a Dawn particularly easy to manufacture, especially in comparison with the previous blades. This objective is achieved when the modeling of the vane vein is made by following the steps below: a) a CAD model of a first surface is created between the intrados and the extrados in such a way that any point the first surface has a normal forming an acute angle or right relative to a direction said first direction of manufacture; and b) creating a CAD model of the foot and heel veins of the blade, so that each of said veins is constituted by a lower surface portion on the underside side and an upper side suction side portion. the extrados, separated by a peak curve from an upstream edge to a downstream edge of the vein through the blade; and any point of the first surface and any point of the foot and bead portions of the side of the first surface has a normal forming an acute or straight angle with respect to the first direction of manufacture. This method makes it possible to create the CAD model of a blade as defined above. By "CAD model" is meant a three-dimensional digital model 3014 94 1 5 such as can be created in particular by computer-aided design software. A particularly effective method for creating the veins is to create them from a hand, a 'peak' curve located at the blade (circumferentially), and secondly from limitation curves which delimit the vein from the intrados and extrados side respectively at its interfaces with the adjacent blades. The CAD model of one of the veins (foot or heel) can in particular be created from a peak curve, created or obtained by a translation or an offset of a construction curve. The construction curve may for example be created on a theoretical vein surface representing a theoretical form of housing ideal for the passage of the fluid. It is also possible to create on the theoretical vein surface curves defining two adjacent blades, that is to say limiting curves. The construction curve and the limitation curves thus created are radially substantially at the same level. For this reason, the peak curve is created by translating or radially shifting the construction curve: this operation makes it possible to create a difference in radial position between these curves, which will, as will be explained below, ensure the presence of sufficient skin on the created vein surface. Preferably, the construction curve is created in such a way that it passes right through the theoretical blade surface. Thus, as previously explained, the discontinuity of slope that generally occurs at the level of the peak curve is partially masked by the fact that it takes place on both sides of the blade. Concerning now the limitation curves, one can create two as previously explained, namely one of the intrados and one of the extrados side. However, the limiting curves are preferably created in such a way that the limiting curve delimiting the vein on the intrados side is confused (with the inter-vane clearance) with the limiting curve delimiting the vein on the extrados side, with a rotation of 360 / N ° near. The vein construction can be done in different ways.
    [0008] In one embodiment, the CAD model of at least one of said portions of one of said veins is obtained by scanning a line segment moving on the basis of two curves. The term 'based on' here means that the line segment is in each moment in contact with the two curves. The segment on the right moves while remaining at all times in a plane perpendicular to the axis of the wheel. The first of the curves used for scanning is preferably the peak curve described above. The second of these curves is preferably the limiting curve described above. Preferably, both sides of the blade are modeled according to the method described above. In this case, while a first side of the blade is modeled according to the method described above, the second side of the blade is modeled by performing the step below: c) creating a CAD model of the blade; second surface of the intrados and extrados (other than the first surface), such that any point of the second surface has a normal forming an acute or straight angle with respect to a direction said second direction of manufacture; and in step b), the CAD model of the foot and heel veins is created so that any point of the foot and heel veins on the second surface side has a normal forming an acute or a right angle by compared to the second manufacturing direction. In one embodiment, the first and second (or second) production direction are identical. The invention also relates to a method for manufacturing a blade for a turbomachine impeller, comprising a foot, a heel and a blade, characterized in that it uses, to define the blade, a modeling method such as than previously defined. The invention also relates to the use, in the CATIA (registered trademark) CAD tool, of the vein modeling method as defined above. Finally, it relates to a computer program comprising instructions for the computer execution of the steps of the blade modeling method as defined above, a computer-readable recording medium on which a computer program is recorded. as defined above, and a computer having a recording medium as defined above. The invention will be better understood and its advantages will appear better on reading the detailed description which follows, of embodiments shown by way of non-limiting examples. The description refers to the accompanying drawings, in which: - Figure 1 is a schematic perspective view of a blade according to the invention. FIG. 2 is a partial schematic perspective view of a turbomachine, showing a paddle wheel having blades identical to those illustrated in FIG. 1; FIG. 3 is a schematic perspective view of the digital model of the blade. of Figure 1 being created by the modeling method according to the invention. - Figure 4 is a schematic radial view with respect to the axis of the impeller, numerical model of the blade of Figure 1 being created by the modeling method according to the invention. FIG. 5 is a diagrammatic view along the axis of the impeller of the numerical model of the blade of FIG. 1 being created by the modeling method according to the invention. Figure 1 shows three identical blades 10 which represent an embodiment of the invention. Each of these blades 10 is designed to be assembled with N-1 identical blades 10 to form a blade wheel 100 comprising N blades 10 (Fig. 2). The impeller 100 is itself part of a turbomachine 110. In the wheel 100, the blades 10 are mounted on a rotor disk 12 axisymmetrically about the axis X of the wheel. When the wheel is operated, a flow of fluid flows along the X axis from an upstream side to a downstream side of the wheel. In what follows, the elements associated with the upstream side are denoted 'u', and the elements associated with the downstream side are denoted 'd'. Each blade 10 comprises successively, in a radial direction outgoing from the wheel, a foot 14, a blade 16, and a heel 18. The foot 14 and the heel 18 thus constitute the two ends of the blade. They comprise respectively a platform 13 and a platform 22. These platforms 13,22 extend in a direction generally perpendicular to the longitudinal direction of the blade 16 (which is the radial direction R for the blade 10 ). The foot platform 13 has a vein 15, and the heel platform 22 a vein 24. In a radial view (in the direction R, as shown in FIG. 4), the vein 15 has a four-sided outer contour, delimited by an upstream edge 17u, a downstream edge 17d, a lower surface edge 17ps, an extrados edge 17ss. (The elements on the intrados side are denoted `ps ', and the elements on the extrados side are noted` ss'). Vein 15 is made up of two complementary parts: a 15 "intrados portion located on the intrados side, and an extrados 15ss portion located on the extrados side of the blade. These two parts 15ps, 15ss are delimited by a peak curve 45c. The vein 15 is connected to the surface of the blade 16 by connecting surfaces 20 (which are evolutionary radius connection fillets), not shown in FIG. 3. The modeling method used to define the shape of the blade blade 10 according to the invention will now be presented. This method comprises the following operations: a) Determination of the theoretical blade area b) Determination of the theoretical vein surface c) Definition of the construction curve for the dawn 25 d) Creation of the vein. These operations are performed on a computer, using a computer-aided design program such as the CATIA (registered trademark) software. The various creation operations indicated below are therefore three-dimensional entity creation operations, which are defined in a virtual three-dimensional space or environment. a) Determination of a theoretical blade area A theoretical blade surface is first created. This surface 35 represents the desired outer surface for the blade 16. This surface is a function in particular of the aerodynamic stresses applicable to the blade; it consists of an extrados 30ss and a 30ps intrados, and has a leading edge 36 and a trailing edge 38 (Fig.3). 3014 94 1 9 b) Determination of theoretical vein surfaces A theoretical foot vein surface 40 and a theoretical heel vein surface 60 are then created or determined. Each of these surfaces has substantially the desired shape for the housing, respectively inner or outer, delimiting the gas flow passage through the impeller. The surfaces 40, 60 extend axially upstream and downstream to peak curves (40U, 40D, 60U, 60D) which axially delimit the extent or extent of the blade that the we want to define. In the example presented, the surfaces 40 and 60 are surfaces of revolution defined around the axis A. That being so, theoretical surfaces for the vein that are not surfaces of revolution can also be used within the scope of the invention. invention, for example surfaces 15 leading to define platforms called `3D platforms' and locally comprising bumps and / or depressions. A surface of revolution about an axis here designates a surface generated by the rotation of a curve around this axis. c) Creation of the vein construction curves After having defined the support entities that are the theoretical surfaces of blade (30) and vein (40,60), one creates the curves of construction 45,65 respectively for the vein of the platform 13 and for the vein of the platform 22.
    [0009] For this, the intersection curve 44 is determined between the theoretical blade surface 30 and the theoretical foot vein surface 40. The intersection curve 64 between the theoretical blade surface 30 and the theoretical foot vein surface 60 is also determined.
    [0010] We then define the manufacturing directions Aps and Ass for the dawn, respectively on the side of the intrados and the extrados. In the embodiment of the invention presented, the first and second manufacturing direction Aps and Ass on both sides of the blade are chosen symmetrical with respect to the plane containing the direction R and perpendicular to the axis X, which simplifies the tooling of manufacture. The manufacturing directions correspond to the demolding, machining or other directions, depending on the manufacturing process used.
    [0011] As a result, in axial view (in a plane perpendicular to the X axis of the impeller, as shown in FIG. 5), the production directions Aps and Ass form a same angle p with respect to the Radial direction R.
    [0012] The determination of the construction curve 45 for the foot platform 13 will now be presented in detail, the same method being then used to determine the construction curve 65 for the heel platform 22. For a given intersection curve between the theoretical blade area and a theoretical vein surface (in this case, the intersection curve is the curve 44), the manufacturing directions (Aps, Ass) correspond to a pair of points (U, D) called limit points' which is defined as follows: A pair of limit points (U, D) is the pair of points, generally located respectively at the vicinity of the leading edge 36 and the trailing edge 38 of the blade, which are part of the intersection curve considered (44), and which divide it into two complementary portions (44ps and 44ss) of the intrados and extrados side respectively, and such that at any point of each of these portions (44ps and 44ss), the angle between the normal to the theoretical blade area at the point considered forms an acute or straight angle with respect to the production direction A. In other words, at each point of one of these curve portions, the theoretical surface blade has a non-negative clearance relative to the direction of manufacture.
    [0013] This generally results in a radial view (i.e. in the radial direction of the blade as shown in FIG. 4), the tangent to the intersection curve (at curve 44) at the endpoints. (U, D) is parallel to the manufacturing directions Aps and Ass, as illustrated in FIG. 4.
    [0014] The choice of manufacturing directions Aps and Ass makes it possible to define a pair of limit points U, D on the curve 44. The construction curve 45 for the foot platform is then defined so as to comply with the following constraints: curve 45 must pass through the limit points U and D; it must extend upstream and downstream to the respective upstream and downstream peak curves 40U and 40D of the theoretical vein surface 40; and 3014 94 1 11 - it must connect points U and D without crossing the theoretical blade surface 30 between these points. The construction curve 45 therefore comprises: a part 45i inside the curve 44, the ends of which are the points U and D. In a radial view (FIG. 4), this portion of the curve 45i extends to Within the curve 44 are two curve portions, 45u and 45d, which are formed on the theoretical foot vein surface 40 respectively from point U to curve 40u and from point D to curve 40d.
    [0015] The construction curve 65 for the heel platform 22 is then created in a similar manner. d) Creation of foot and heel veins Foot and heel veins are created in the following manner.
    [0016] Only the creation of the foot vein is described, the heel vein being created analogously. The limitation curve (generically noted curve 52) is first created to delimit the adjacent blade platforms. More precisely, two instances 52ps and 52ss of this limiting curve 52 are created, one on the intrados side and the other on the extrados side of the theoretical blade surface 30, these two curves being identical to each other at 360 ° / N angle rotation about the X axis. These 52ps and 52ss curves are created on the surface of the theoretical vein surface 40. A peak curve 45c is created by radially shifting the curve 45 in the centrifugal direction by a height H whose value is specified below. We then create vein support surfaces 46ps and 46ss by scanning of line segments moving on either side of the theoretical blade surface, on the one hand on the one hand the peak curve 45c, and on the other hand 30 shares respectively on the 52ps curve and the 52ss curve. At each moment, each of these line segments remains contained in a plane P perpendicular to the axis X of the wheel. The value H of the radial offset of the curve 45c is chosen to be sufficient so that the vein support surfaces 46ps and 46ss have, in any plane P, a sufficient clearance with respect to the demolding direction A: c ' that is, in each of the planes P, the angle Q between a point of the section of the vein support surface and the demolding direction A 3014 94 1 12 must be greater than the desired minimum clearance angle amini (In a borderline case, the minimum desired draft angle amini may be 0). Furthermore, in all cases there should be no undercut: Thus at each point of each of the vein support surfaces 46ps 46 and 46ss, the angle between the normal at the point considered and the direction of manufacture for the vein support surface whose point is part of an acute or straight angle, but in no case an obtuse angle (> 90 °). Since the surfaces 46ps and 46ss are created by scanning 10 line segments contained in planes P and moving in support of two curves, their sections in any plane P are straight line segments. Surfaces 46ps and 46ss, however, may also, while remaining within the scope of the invention, be created by any other suitable method of surface creation. In particular, it must be ensured that the preceding condition is respected in each of the planes P, that is to say that in each of these planes the angle between any point of the section of the vein support surface and the manufacturing direction concerned (Aps or Ass) is greater than the minimum desired clearance angle amini. The construction of the surfaces 46ps and 46ss by scanning a line segment resting on two curves, as presented above, has the consequence that the surfaces 46ps and 46ss of two adjacent blades have a common boundary delimited by a curve 52.
    [0017] If another method than this is used to create the 46ps and 46ss surfaces, it is desirable that the 46ps and 46ss surfaces be formed in such a way that there is no discontinuity (at least in position) between two adjacent blades: this means that the edges opposite to the blade of the 46ps and 46ss surfaces must correspond (or be opposite) to a rotation of 360 ° / n degrees. On the blade 10, this causes the edges delimiting the vein 15 respectively of the intrados and extrados side (referenced 17ps and 17ss, both of which are geometrically defined from the curve 52) are substantially merged, to a rotation from 360 / N ° near.
    [0018] Once the vein support surfaces 46ps and 46ss have been created, they must be limited. For this purpose, the surfaces of the connecting fillet are first calculated between the theoretical blade surface 30 and the vein support surfaces 46ps and 46ss. The vein support surfaces 46ps, 46ss are limited at the end of the connection fillet surfaces. However, upstream and downstream of the theoretical blade surface 30, the vein support surfaces 46ps and 46ss meet at the 45u and 45d curve portions of the peak curve 45c. The joining of the 46ps and 46ss surfaces thus limited constitutes the vein 15 of the platform 13. The heel vein 24 is created in the same manner, as are the connection fillets 72 between the vein 24 and the theoretical blade surface 30 At the creation of the heel vein 24, it is therefore necessary to create a peak curve 65c, radially shifting the curve 65 by a value H '(which is not necessarily equal to H). The radial offset is naturally made in the direction of the X axis.
    [0019] As a result, on the underside side as well as on the extrados side and since the curve 45 has been shifted by a sufficient height H, the vein support surfaces of the heel and foot platforms have in all plane P a sufficient clearance relative to the direction of manufacture A.
    [0020] Finalization of the model of the dawn The numerical model of the complete dawn is then finalized by integrating in this one in particular the veins 15 and 24, the fillets 20 and 72, and the theoretical surface of the blade 30, once the limitations.
    [0021] Manufacture of the blades The blade 10 can then be industrialized and manufactured with the geometry defined by the CAD model thus defined.
    权利要求:
    Claims (15)
    [0001]
    REVENDICATIONS1. Blade (10) for turbomachine impeller (100); the blade comprising successively, in a radial direction out of the wheel, a foot (14), a blade (16), and a heel (18); the foot (14) comprising a platform (13) of foot having a surface (15), said foot vein, on the side of the blade; the heel (18) having a platform (22) of heel having a surface (24), said heel vein, on the side of the blade; the blade (16) having an outer surface said blade surface (30) having a lower surface (30ps) and an upper surface (30ss); the dawn being characterized in that each of said veins is constituted by a portion of intrados (15ps, 24ps) on the side of the intrados and an extrados part (15ss, 24ss) on the extrados side, separated by a peak curve (45,65) from an upstream edge (15U, 24U) to a downstream edge (15D, 24D) of the vein through the blade; and in that any point of a first surface of the intrados and extrados and any point of the heel and foot vein portions on the first surface side has a normal forming an acute or right angle with respect to to a direction called first direction of manufacture (Aps).
    [0002]
    A blade according to claim 1, wherein any point on the second surface of the blade, other than the first surface, and any point of the heel and foot vein portions on the side of the second surface have a normal forming an acute angle or right relative to a direction said second direction of manufacture.
    [0003]
    3. A blade according to claim 2, wherein, in radial view, the first and second manufacturing directions are parallel in opposite directions.
    [0004]
    4. blade according to any one of claims 1 to 3, wherein over a portion of the axial extent of the blade, or in particular over the entire axial extent of the blade, a section of the foot vein or of the heel vein on the first side in a plane containing a substantially radial direction for the blade and the first direction of manufacture is mainly constituted by a line segment. 3014 94 1 15
    [0005]
    5. blade according to any one of claims 1 to 4, provided for a turbine wheel (100) turbine engine comprising N vanes, and wherein an edge defining the vein of a first platform of the dawn of the intrados side is substantially merged with an edge delimiting the vein of the first platform on the extrados side, at a rotation of 360 / no.
    [0006]
    A paddle wheel (100) comprising a plurality of blades (10) according to any one of claims 1 to 5. 10
    [0007]
    7. A turbomachine (110), in particular a low-pressure turbine, comprising a bladed wheel (100) according to claim 6.
    [0008]
    8. A method of modeling a blade successively comprising a foot, a blade, and a heel, an outer surface of the blade being constituted by an extrados and a lower surface, the method being characterized in that it comprises the following steps a) a CAD model of a first surface is created between the intrados and the extrados so that any point of the first surface has a normal forming an acute or straight angle with respect to a direction called first direction of manufacture ; and b) creating a CAD model of the veins of the foot and heel of the blade, so that each of said veins is constituted by a portion of intrados (15ps, 24ps) on the side of the intrados and a portion of extrados (15ss, 24ss) on the extrados side, separated by a peak curve (45,65) from an upstream edge (15u, 24u) to a downstream edge (15d, 24d) of the vein through the blade; and that any point of the first surface and any point of the foot and bead portions of the side of the first surface has a normal forming an acute or straight angle with respect to the first direction of manufacture.
    [0009]
    9. The modeling method according to claim 8, wherein in step b), the CAD model of one of said veins is created from the peak curve (45c), which is obtained by a translation or an offset of a construction curve (45).
    [0010]
    10. A modeling method according to claim 9, wherein in step b), the construction curve is created in such a way that it crosses right through a theoretical blade surface (30). 3014 94 1 16
    [0011]
    11. A modeling method according to any one of claims 8 to 10, wherein in step b), one of said veins is created in such a way that a limiting curve delimiting said vein on the intrados side is substantially confused with a limiting curve delimiting said vein on the extrados side, at a rotation of 360 / no.
    [0012]
    12. A modeling method according to any one of claims 8 to 11, wherein in step b), the CAD model of at least one of said parts 10 of one of said veins is obtained by scanning a segment. right moving on two curves (45c, 52ps, 52ss).
    [0013]
    13. A method of modeling a blade, according to which a first side of a blade is modeled according to the method according to any one of claims 8 to 12; the method further comprising the following step: c) creating a CAD model of a second surface of the intrados and extrados, other than the first surface, such that any point of the second surface has a normal forming an acute or straight angle with respect to a direction said second direction of manufacture; and wherein in step b) the CAD pattern of the foot and heel veins is created such that any point of the foot and heel veins on the side of the second surface has a normal forming an acute angle or right compared to the second manufacturing direction. 25
    [0014]
    The modeling method of claim 13, wherein the first and second manufacturing directions are the same.
    [0015]
    15. A method of manufacturing a blade for a turbomachine impeller, comprising a foot, a heel and a blade, characterized in that it uses, to define the blade, a modeling method according to any one of the following: Claims 8 to 14.
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    FR3077601A1|2019-08-09|AIRCRAFT TURBINE TURBINE
    FR3025563A1|2016-03-11|AUBE A PLATFORM AND EXCROIDANCE CREUSEE
    FR3001761A1|2014-08-08|Flow distribution vane for use in turboshaft engine of aircraft, has sealing plate comprising quibblings uniformly distributed along circumference of plate for holding plate in axial position in groove with respect to axis of inner platform
    同族专利:
    公开号 | 公开日
    RU2717183C2|2020-03-18|
    US10626728B2|2020-04-21|
    JP6687522B2|2020-04-22|
    WO2015092204A1|2015-06-25|
    FR3014941B1|2016-01-08|
    EP3084132A1|2016-10-26|
    RU2016128803A|2018-01-23|
    US20170122108A1|2017-05-04|
    EP3084132B1|2019-05-15|
    CN105829652B|2019-06-28|
    JP2017500486A|2017-01-05|
    CA2934052A1|2015-06-25|
    CN105829652A|2016-08-03|
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    US4602412A|1982-12-02|1986-07-29|Westinghouse Electric Corp.|Method for assembling in a circular array turbine blades each with an integral shroud|
    GB2293212A|1994-09-16|1996-03-20|Mtu Muenchen Gmbh|Turbomachine rotor blade mounting arrangement|
    EP1734227A1|2005-06-13|2006-12-20|General Electric Company|V-shaped blade tip shroud and method of fabricating same|
    JPS61103503U|1984-12-13|1986-07-01|
    WO2000070509A1|1999-05-13|2000-11-23|Rolls- Royce Corporation|Method for designing a cyclic symmetric structure|
    US6857853B1|2003-08-13|2005-02-22|General Electric Company|Conical tip shroud fillet for a turbine bucket|
    US20090285690A1|2008-05-19|2009-11-19|Brown Clayton D|Axial blade slot pressure face with undercut|
    FR2937770B1|2008-10-27|2011-04-22|Snecma|METHOD FOR CREATING A NON-AXISYMETRIC SURFACE|
    JP5426305B2|2009-09-30|2014-02-26|株式会社東芝|Turbo machine|
    US20120051930A1|2010-08-31|2012-03-01|General Electric Company|Shrouded turbine blade with contoured platform and axial dovetail|
    US9103213B2|2012-02-29|2015-08-11|General Electric Company|Scalloped surface turbine stage with purge trough|ES2819128T3|2017-03-03|2021-04-15|MTU Aero Engines AG|Contouring of a pallet from a pallet rack|
    KR101984397B1|2017-09-29|2019-05-30|두산중공업 주식회사|Rotor, turbine and gas turbine comprising the same|
    JP2020090953A|2018-12-07|2020-06-11|三菱日立パワーシステムズ株式会社|Axial flow type turbo machine and its blade|
    CN112069630B|2020-11-11|2021-01-22|中国航发上海商用航空发动机制造有限责任公司|Compressor, blade, two-dimensional blade profile design method of blade and computer equipment|
    法律状态:
    2015-12-17| PLFP| Fee payment|Year of fee payment: 3 |
    2016-12-09| PLFP| Fee payment|Year of fee payment: 4 |
    2017-11-21| PLFP| Fee payment|Year of fee payment: 5 |
    2018-02-02| CD| Change of name or company name|Owner name: SAFRAN AIRCRAFT ENGINES, FR Effective date: 20170719 |
    2019-11-20| PLFP| Fee payment|Year of fee payment: 7 |
    2020-11-20| PLFP| Fee payment|Year of fee payment: 8 |
    2021-11-18| PLFP| Fee payment|Year of fee payment: 9 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1362899A|FR3014941B1|2013-12-18|2013-12-18|AUB FOR TURBOMACHINE WHEEL WHEEL AND METHOD OF MODELING THE SAME|FR1362899A| FR3014941B1|2013-12-18|2013-12-18|AUB FOR TURBOMACHINE WHEEL WHEEL AND METHOD OF MODELING THE SAME|
    RU2016128803A| RU2717183C2|2013-12-18|2014-12-08|Blade for turbo machine impeller and method for modelling the same|
    CN201480069669.4A| CN105829652B|2013-12-18|2014-12-08|The blade and its modeling method of turbine wheel|
    EP14828201.5A| EP3084132B1|2013-12-18|2014-12-08|Blade for a turbo machine impeller and method for modelling the same|
    JP2016541041A| JP6687522B2|2013-12-18|2014-12-08|Blades for turbomachine impellers and how to model these blades|
    PCT/FR2014/053204| WO2015092204A1|2013-12-18|2014-12-08|Blade for a turbo machine impeller and method for modelling the same|
    US15/104,904| US10626728B2|2013-12-18|2014-12-08|Blade for a turbomachine impeller and method for modelling the same|
    CA2934052A| CA2934052A1|2013-12-18|2014-12-08|Blade for a turbo machine impeller and method for modelling the same|
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