• 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:
    The invention relates to a turbomachine rotor disc (1), comprising a flange (2) which has: a plurality of fixing holes (3), and a plurality of festoons (4) forming notches in the flange ( 2), and being separated by inter-festoon flange portions (7), characterized in that: - one or more of the festoons (47, 48, 49, 42, 45-47, 48-411, 414) has a volume greater than the volume of each of the other scallops (41-46, 410-414; 41, 43, 44, 412, 413) and / or - one or more of the inter-scallop flange portions (73) has a volume less than the volume of each of the other inter-scallop flange portions (71, 72, 74) for balancing said disc (1). The invention also relates to a turbomachine comprising this rotor disc, and a method of balancing a rotor disk.
    公开号:FR3021066A1
    申请号:FR1454471
    申请日:2014-05-19
    公开日:2015-11-20
    发明作者:Pascal Casaliggi；Remi Bourion；Thierry Capolungo
    申请人:SNECMA SAS；
    IPC主号:
    专利说明:

    [0001] FIELD OF THE INVENTION The invention relates to a turbomachine rotor disk, and a method of balancing this disk.
    [0002] BACKGROUND ART In a turbomachine, one or more rotors are provided, each comprising at least one disc. This disk usually receives the feet of the blades. It is necessary to mechanically balance the rotor disk, especially with respect to its unbalance. In the prior art, various balancing methods have been proposed. One solution is to set up a balancing lanyard. This solution is however penalizing the mass of the whole. In addition, some parts of the disc have a fixed geometry to impose the section of the airflow. In addition, gaps are required for the passage of fastening tools of disk fixing bolts. Consequently, the space available for setting up such a cord is reduced, which can make its implementation complex. Another solution is to balance the disk via rivets. This solution is also penalizing the mass of the whole. In addition, both sides of the disk upstream flange are in general contact with other parts (such as another disk) or balancing weights, making it impossible to place rivets. SUMMARY OF THE INVENTION In order to overcome these drawbacks, the invention provides a turbomachine rotor disk, comprising a flange which has a plurality of fixing holes, and a plurality of festoons forming notches in the flange, and being separated by inter-festoon flange portions, characterized in that at least one of the festoons has a volume greater than the volume of each of the other festoons and / or at least one inter-festoon flange portion has a volume less than the volume of each of other inter-festoon flange portions to balance said disk. The invention is advantageously completed by the following features, taken alone or in any of their technically possible combination: the festoons having a volume greater than the volume of the other festoons are not adjacent to each other, and / or the portions of the internal flange. scallops having a volume smaller than the volume of the other inter-scallop flange portions are not adjacent to each other; the flange extends outwardly of the disc; the flange extends towards the inside of the disc. The invention also relates to a turbomachine comprising a rotor of which at least one disk is as described above.
    [0003] The invention also relates to a method of balancing a turbomachine rotor disk comprising a flange having a plurality of mounting holes, and a plurality of festoons forming notches in the flange, and being separated by flange portions. inter-scallop, characterized in that it comprises the steps of measuring the unbalance of the disc, machining one or more festoons, so that they have a volume greater than the volume of each of the other scallops, and / or one or more portions inter-scallop flange, so that they have a volume less than the volume of each of the other inter-scallop flange portions, so as to balance the disc vis-à-vis the unbalance measured.
    [0004] The method is advantageously completed by the following features, taken alone or in any of their technically possible combination: the method comprises the step of selecting the festoons and / or inter-festoon flange portions to be machined according to the amplitude and / or angular position of measured unbalance; prior to the machining step, the festoons have an apex along the radial axis of the disk, and the festoon machining step does not modify the position of said vertices along a radial axis of the disk. The invention has many advantages. The invention proposes a balancing method whose robustness is increased. In addition, the solution avoids the addition of additional masses intended solely for balancing. A gain in mass is therefore achieved. Finally, the solution makes it possible to maintain the possibility of setting up balancing weights of the module comprising the disk.
    [0005] DESCRIPTION OF THE DRAWINGS Other characteristics, objects and advantages of the present invention will appear better on reading the detailed description which follows, and with reference to the appended drawings given as non-limiting examples and in which: FIG. a sectional representation of a rotor disc connected to other parts of the turbomachine via its upstream flange and its downstream flange; Figure 2 is a three-dimensional representation of a rotor disk; Figure 3 is a representation of a portion of the flange of a rotor disc; Figure 4 is a representation of an exemplary embodiment of a flange having festoons volume greater than that of each of the other festoons; Figure 5 is a representation of another embodiment of a flange having festoons greater volume than each of the other festoons; Figure 6 is a representation of an exemplary embodiment of a flange having an inter-festoon flange portion of a volume less than that of each of the other inter-festoon flange portions; Figure 7 is a representation of a method of balancing a rotor disc. DETAILED DESCRIPTION Rotor disc 1 and 2 show a turbomachine rotor disc 1 along a longitudinal axis (X) The disc 1 is generally not full, and comprises a solid annular outer portion, and a The disk 1 has a periphery 12 capable of receiving blades, for example the periphery 12 comprises a plurality of housings 10 for receiving the blades, The disk 1 further comprises at least one flange 2. On FIGS., the flange 2 is carried by a portion 13 which protrudes along the longitudinal axis XX from the annular outer portion of the disk 1. The solution applies both to the upstream flange as to the flange downstream of the disc 1. The flange 2 allows the attachment of the disc to adjacent parts of the rotor or the turbomachine.
    [0006] The flange 2 extends circumferentially. In the figures, the flange 2 extends on the circumference of the portion 13 projecting. It may, however, extend over any other circumference of the disc 1. In the figures, the flange 2 extends radially outwards of the disc 1. In a variant, the flange 2 extends radially towards the inside of the disc 1.
    [0007] The flange 2 comprises a plurality of fixing holes 3 (see Figure 3). These holes 3 allow attachment to another part of the engine, such as another disc, through fastening pieces 17 through these holes 3 and complementary holes provided in the adjacent piece.
    [0008] The flange 2 further comprises a plurality of festoons 4. These festoons 4 form notches in the flange 2. These festoons 4 serve in particular to stress unload the holes 3 of the flange 2 and ensure its mechanical strength. In addition, these festoons make it possible to obtain a gain in mass. The flange 2 alternatively has fixing holes 3 and festoons 4.
    [0009] The scallops 4 are in turn separated by portions 7 of flange, which will be described later portions 7 inter-festoon flange. The scallops 4 are therefore recessed portions of the flange 2, and the flange portions 7 inter-scallop the material portions of the flange 2. According to one embodiment, one or more festoons each have a volume greater than that of each of the other festoons. By volume of a festoon 4 is meant the volume of the recess made by said festoon 4 in the flange 2. This results from the fact that the section of said festoon (or said festoons) in a radial plane (plane orthogonal to the axis longitudinal) (X) is greater than the section of the other scallops. In other words, some festoons each make notches of larger volume than the other festoons in the flange 2. This configuration allows to mechanically balance the disk 1, especially vis-à-vis its imbalance. As explained later, the appropriate choice of the number and / or the position and / or the volume of the festoons concerned makes it possible to reduce or eliminate the unbalance of the disc 1. Examples are shown schematically in FIGS. 4 and 5. In FIG. 4, the festoons 47, 48 and 49 each have a volume greater than that of the other festoons 41 to 46, and 410 to 414 of the flange 2. It should be noted that the festoons having a larger volume than the other festoons do not are not necessarily adjacent to each other on the flange 2. Figure 5 illustrates a configuration in which the festoons 42, 45, 46, 47, 48, 49, 410, 411, 414, which have a larger volume than the other 30 festoons 41, 43, 44, 412 and 413, are not all adjacent to each other. Alternatively, or in addition, at least one inter-scallop flange portion has a smaller volume than each of the other inter-scallop flange portions. By inter-festoon flange portion volume is meant the volume of material occupied by said inter-festoon flange portion. Some of the inter-festoon flange portions are thus machined so as to have a volume less than the volume of each of the other portions that have not been machined. The removal of material is, for example, carried out along the radial axis of the disk, substantially perpendicular to the longitudinal axis) (FIG 6 illustrates an example in which the inter-scallop flange portion 73 has a smaller volume than the volume. each of the other inter-scallop flange portions 71, 72, 74. In one possible aspect, the inter-scallop flange portions having a volume less than the volume of each of the other inter-scallop flange portions are not adjacent to one another. .
    [0010] The solution employing one or more interferometer flange portions of less volume than the volume of each of the other flange portions improves the angular accuracy of unbalance recovery. The rotor disc 1 can for example be installed in a compressor (high-pressure or low-pressure) and / or in a turbine 20 (high-pressure or low-pressure) of a turbomachine. The proposed balancing solution is particularly advantageous in an aircraft used for business aviation, which requires precise balancing of the parts of the high pressure turbine. Balancing method A method of balancing a turbomachine rotor disk 1 comprising a flange 2 having a plurality of fixing holes 3 and a plurality of festoons 4 forming notches is described (see FIG. in the flange 2, and being separated by inter-festoon flange portions 7. One of the functions of the festoons is to unload the flange 2 in tension.
    [0011] In one possible aspect, the festoons 4 have a rounded contour, so as to maximize the material of the flange 2 can be removed in the subsequent machining step. A first step El consists in measuring the unbalance of the disc 1 via a state of the art unbalance measuring device known as a balancer by a person skilled in the art. The method then comprises the step E3 of machining: one or more festoons, so that they have a volume greater than each of the other scallops, and / or one or more inter-festoon flange portions, so that those have a volume smaller than the volume of each of the other inter-festoon flange portions. The machining of the disc 1 as described makes it possible to balance the disc 1 with respect to the unbalance measured.
    [0012] In one possible aspect, the method comprises the step E2 of selecting the festoons and / or inter-festoon flange portions to be machined according to the amplitude and / or the angular position of the unbalance measured. The selection of scallops and / or inter-scallop flange portions to be machined can be carried out as follows.
    [0013] A processing unit, integrated in the measuring device, or external, provides from the unbalance measurement and an equivalence table, the angular position and the number of festoons to be machined. If necessary, the processing unit also provides the volume of festoons to be machined. The equivalence table takes into account the parameters of the parts (dimensions, positions, ...). Alternatively, or in addition, the processing unit provides the angular position and the number of inter-festoon flange portions to be machined. If necessary, the processing unit also provides the volume of inter-festoon flange portions to be machined.
    [0014] Prior to the machining step, the festoons 4 have an apex 21 (see FIG. 3) along the radial axis (R) of the disc. According to one possible aspect, the step of machining the festoons 4 does not modify the position of said vertices 21 along the radial axis of the disc 1. Indeed, the festoons 4 fulfill two functions: on the one hand, the festoons 4 allow to unload in constraint the flange 2, and, on the other hand, the festoons 4 of higher volume make it possible to fight against the unbalance. The conservation of the position of the tops 21 of the festoons 4 of higher volume, even after their machining, allows them to retain their stress discharge function of the flange 2 (which depends in particular on the radial position of their top 21 vis-à-vis the fixing holes 3). Machining to increase the volume of the festoons in question is therefore operated in all directions as long as it does not change the radial position of the top 21. In one embodiment, the disk 1 does not present originally any festoons, and these are made during the step E3 machining. This step E3 then comprises the machining of the flange 2 to perform a sufficient number of festoons necessary for balancing the disc 1. The angular position of the festoons is fixed and determined in advance by the position of the holes 3. In addition, this Step E3 may also include machining the inter-festoon flange portions, as previously mentioned.
    权利要求:
    Claims (3)
    [0001]
    REVENDICATIONS1. A turbomachine rotor disc (1) comprising a flange (2) which has a plurality of fixing holes (3), and a plurality of festoons (4) forming notches in the flange (2), and being separated by inter-scallop flange portions (7), characterized in that one or more of the scallops (47, 48, 49; 42, 45-47, 48-411, 414) has a volume greater than the volume of each of the other scallops (41-46,410-414; 41,43,44,412,413) and / or one or more of the inter-festoon flange portions (73) has a volume less than the volume of each of the other portions (71,72,74) of inter-scallop flange, for balancing said disc (1).
    [0002]
    2. Disc (1) according to claim 1, wherein: the festoon having a volume greater than the volume of the other scallops are not adjacent to each other, and / or inter-scallop flange portions having a volume less than the volume of other inter-festoon flange portions are not adjacent to each other. . Disc according to claim 1, wherein the flange (2) extends outwardly of the disc (1). 4. Disk according to claim 1, wherein the flange (2) extends towards the inside of the disk (1). 5. Turbomachine comprising a rotor of which at least one disc (1) is according to one of claims 1 to 4.
    [0003]
    A method of balancing a turbomachine rotor disk (1) comprising a flange (2) which has: a plurality of fixing holes (3), and a plurality of festoons (4) forming notches in the flange (2), and being separated by inter-festoon flange portions (7), characterized in that it comprises the steps of: measuring (E1) the unbalance of the disk (1); machining (E3) o one or more festoons (47, 48, 49; 42, 45-47, 48-411, 414), so that these (41, 42, 43) have a volume greater than the volume of each of other scallops (41-48,410-414; 41,43,44,412,413), and / or o one or more inter-scallop flange portions (73) so that they have a volume less than the volume of each other portions (71, 72, 74) inter-scallop flange, so as to balance the disc (1) vis-à-vis the unbalance measured. 7. The method of claim 6, comprising a step (E2) of selecting the festoons and / or inter-festoon flange portions to be machined according to the amplitude and / or the angular position of the unbalance measured. 8. Method according to one of claims 6 or 7, wherein: prior to the machining step, the festoons (4) have an apex (21) along the radial axis of the disk, and the step of machining the scallops (4) does not modify the position of said vertices along a radial axis of the disc (1).
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    引用文献:
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    US8353670B2|2009-07-30|2013-01-15|Pratt & Whitney Canada Corp.|Axial balancing clip weight for rotor assembly and method for balancing a rotor assembly|
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    法律状态:
    2015-05-19| PLFP| Fee payment|Year of fee payment: 2 |
    2015-11-20| PLSC| Search report ready|Effective date: 20151120 |
    2016-05-17| PLFP| Fee payment|Year of fee payment: 3 |
    2017-04-28| PLFP| Fee payment|Year of fee payment: 4 |
    2018-02-02| CD| Change of name or company name|Owner name: SAFRAN AIRCRAFT ENGINES, FR Effective date: 20170719 |
    2018-04-23| PLFP| Fee payment|Year of fee payment: 5 |
    2019-04-19| PLFP| Fee payment|Year of fee payment: 6 |
    2020-04-22| PLFP| Fee payment|Year of fee payment: 7 |
    2021-04-21| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1454471A|FR3021066B1|2014-05-19|2014-05-19|BALANCED ROTOR DISC, AND BALANCING METHOD|
    FR1454471|2014-05-19|FR1454471A| FR3021066B1|2014-05-19|2014-05-19|BALANCED ROTOR DISC, AND BALANCING METHOD|
    US14/715,488| US9920626B2|2014-05-19|2015-05-18|Balanced rotor disc, and balancing method|
    GB1508561.6A| GB2527667B|2014-05-19|2015-05-19|Balanced rotor disc, and balancing method|
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