• 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 device (11) for applying abradable material for applying abradable material to a surface of a turbomachine annular casing (1), the casing extending along a longitudinal axis of the device ( 11) comprising a support (12, 13) equipped with first guiding means (14) able to guide the support (12, 13) with respect to a casing (1), in a direction radial relative to the axis of the casing , the support (12, 13) being provided with second guiding means (16) able to guide the support (12, 13) relative to the casing (1) in an axial direction, an application roller (20) being mounted pivoting relative to the support (12, 13) in the axial direction, adjusting means (22, 23) for adjusting the position of the roller (20) relative to the first guide means (14), in the radial direction .
    公开号:FR3048018A1
    申请号:FR1651430
    申请日:2016-02-22
    公开日:2017-08-25
    发明作者:Richard Mathon；Raoul Jaussaud；Dominique Michel Serge Magnaudeix
    申请人:SNECMA SAS；
    IPC主号:
    专利说明:

    Device for applying abradable material to a surface of a turbomachine casing
    The present invention relates to an abradable material application device for applying abradable material to a surface of a turbomachine casing, for example an internal surface of said casing.
    As illustrated in FIG. 1, a turbomachine, such as a turbojet engine or an airplane turboprop engine, conventionally comprises a fan casing 1 of which a substantially cylindrical wall 2 surrounds in particular the vanes of the fan.
    The casing 1 is part of a nacelle which surrounds the motor of the turbomachine and inside which rotates a blower which generates a secondary air flow which flows between the nacelle and the engine and forms part of the thrust produced by the turbomachine.
    The casing 1 comprises a substantially cylindrical wall 2 which has at its longitudinal ends annular fixing flanges 3, 4. The downstream flange 4 is fixed by screw-nut means to a flange (not shown) of an intermediate casing and the upstream flange 3 is fixed by screw-nut means to a flange (not shown) of an air inlet sleeve in the nacelle. The upstream and downstream terms are defined with respect to the flow of gas flow through the turbomachine.
    The inner surface of a fan casing 2 conventionally comprises annular acoustic insulation panels which cover the inner cylindrical surface of the wall 2 and which are fixed to this wall by any appropriate means. These panels generally have an annular honeycomb structure, formed of adjacent cells, whose inner and / or outer faces are each covered with a coating, also called skin. These panels are in particular intended to absorb the sound waves generated by the fan of the turbomachine. The casing 1 more particularly comprises an upstream panel, located upstream of the blades of the blower, a median panel 5, located opposite the blades of the blower, and a downstream panel, located downstream of the blades of the blower. The median panel 5 supports a layer 6 of abradable material against which the radially outer ends of the blades are intended to rub in operation.
    In order to produce the layer 6 of abradable material, portions 7 of paste of abradable material in the form of balls or portions are disposed manually on the inner skin of the median panel 5, as shown in Figure 3, and the surface radially internal layer of abradable material 6 is carried out manually by scraping with a shaped knife. More particularly, different knives are used successively, so as to achieve one or more blank passes, and at least one finishing pass.
    In the case of the embodiment illustrated in FIG. 2, an abradable layer 6 is obtained whose inner surface has a cylindrical upstream portion 8, a cylindrical downstream portion 9 of greater thickness than the upstream portion, and a frustoconical portion 10 connecting the upstream and downstream parts.
    The abradable layer 6 is then allowed to air dry so that it hardens and has the necessary mechanical characteristics.
    Such a manufacturing process is long, painful and expensive. In addition, knives used for scraping tend to tear off material and form surface defects which must then be filled. During such filling, abradable material is added again, this addition may have a different color from the original material. The internal surface of the abradable layer obtained after such a filling then has aesthetic defects. The invention aims in particular to provide a simple, effective and economical solution to this problem. For this purpose, it proposes an abradable material application device for the application of abradable material on a surface of an annular turbomachine casing, the casing extending along a longitudinal axis, the device comprising an equipped support. first guide means adapted to guide the support relative to a housing, in a direction radial relative to the axis of the housing, the support being equipped with second guide means capable of guiding the support relative to the housing in a direction axial, an application roller being pivotally mounted relative to the support in the axial direction, adjusting means for adjusting the position of the roller relative to the first guide means, in the radial direction.
    Such a device can be used to distribute easily and quickly abradable material on the inner skin of a central panel fan case for example. For this, a device of the aforementioned type can be mounted on the housing, so that the first guide means for example support radially on the radially inner surface of the housing, and so that the second guide means take for example support axially on an end flange of the housing. It is then sufficient to move the device relative to the housing so that the roller pivots and bears against the abradable material in the form of a paste, the roll thus distributing the malleable abradable material on the corresponding surface, in order to obtain the desired profile.
    Several passes of the roll on the dough may be necessary in order to obtain a homogeneous distribution of the abradable material.
    The adjustment means can make it possible to carry out one or more passes of blanks, then one or more finishing passes. In this case, the position of the roll with respect to the cylindrical surface on which the abradable material is affixed can be adjusted between each pass by means of said adjustment means.
    The first guide means may comprise rolling means adapted to bear on the housing in the radial direction and able to move on said housing.
    Furthermore, the second guide means may comprise rolling means adapted to bear on the housing in the axial direction and able to move on said housing.
    This reduces the friction during movement of the device relative to the housing, which avoids any degradation of the housing and easy implementation of the device.
    The support may comprise a first portion and a second portion movable in the radial direction relative to the first portion, the roller being pivotally mounted on the second portion of the support, the first guide means and the second guide means being mounted on the first part of the support.
    In this case, the adjustment means may be mounted between the first portion and the second portion of the support and are adapted to adjust the position of the second portion relative to the first portion in the radial direction.
    The adjustment means may then comprise at least one screw cooperating with at least one nut, the pivoting of the screw relative to the nut causing the displacement in translation of the second part relative to the first part.
    Guiding means in translation of the second part relative to the first part, in the radial direction, may be provided. Such guiding means may for example comprise at least one rod or at least one guide pin secured to one of the parts of the support, the rod or the column being mounted displaceable in translation in a hole or a guide ring of the other part of the support, for example.
    The support may comprise gripping means, for example at least one handle.
    In particular, at least a first handle can be oriented to facilitate the application of the first guide means bearing on the housing, in the radial direction, and at least a second handle can be oriented to facilitate the application second guide means bearing on the housing, in the axial direction.
    The roller may comprise at least two parts capable of pivoting independently of each other, for example at least one cylindrical portion and at least one frustoconical portion.
    The roller may for example comprise two cylindrical end portions, of different diameters, and a frustoconical middle part, the surface of the roll preferably being continuous from one part to the other.
    The roll may also comprise at least two parts having different profiles and / or different surface states.
    The formation of the roll in several parts makes it possible to limit the sliding phenomena at the interface between the roll and the abradable material, so as to avoid the peeling or tearing of abradable material during its application. This avoids having to fill such areas detached or ripped off. The invention also relates to a method of applying abradable material to a turbomachine casing, comprising the steps of: - applying the paste of abradable material on an annular surface of the casing, - mounting a device of the aforementioned type on the casing , so that the first guide means bear radially on an annular surface of the casing, for example a radially internal surface, and so that the second guide means bear axially on a bearing surface of the casing , for example on an end flange of the housing, - relatively move the device relative to the housing so that the roller pivots and bears on the abradable material in the form of paste, the roll thus distributing the abradable material under paste form on the corresponding surface.
    As previously indicated, such a method may include one or more blank passes, and then one or more finishing passes. For this, the radial position of the roller relative to the cylindrical surface on which is affixed the abradable material can be adjusted between each pass with the adjustment means.
    According to an alternative embodiment, it is possible to proceed by angular sections of the inner surface of the housing. Thus, it is possible to apply the paste and move the aforementioned device on an angular section of the inner surface of the housing, then the housing can be rotated about its axis by a determined angle, before applying the paste and to move the aforementioned device on a new angular section of the inner surface of the housing.
    The method may also comprise a step of drying the material, for example in the open air.
    The abradable material used is, for example, a polymer material based on epoxy resin and comprising hollow beads, for example hollow glass balls. The invention will be better understood and other details, features and advantages of the invention will become apparent on reading the following description given by way of non-limiting example with reference to the accompanying drawings, in which: FIG. 1 is a view in perspective of a turbomachine fan casing having a layer of abradable material, - Figure 2 is a half-sectional view illustrating a section of the fan casing of Figure 1, - Figure 3 is a schematic view of detail illustrating, in particular, the placing of portions of paste of abradable material on the corresponding cylindrical surface of the fan casing; FIG. 4 is a perspective view of the device according to the invention; FIG. 5 is a front view of the device of FIG. FIG. 4 represents the method of applying the abradable material according to one embodiment of the invention in which the axis of the casing is oriented vertically. FIG. 7 shows the method of applying the abradable material according to one embodiment of the invention in which the axis of the casing is oriented horizontally.
    Figures 4 and 5 show a device 11 for applying abradable material, for the application of abradable material on a surface of a casing 1 of a turbomachine.
    The device 11 comprises a support comprising a first portion 12 and a second portion 13. The first portion 12 has, in front view, a generally U-shaped comprising a base 12a from which extend two branches 12b. The free end of each leg 12b has two opposite legs 12c, each leg 12c carrying a roller 14 whose axes of rotation 15 are parallel to the base 12a. The first portion 12 of the support further comprises an additional branch 12d, extending from a lateral end of the base 12a and extending parallel to the branches 12b. The free end of the additional branch 12d comprises two opposite legs 12e each carrying a rolling roller 16 whose axis of rotation 17 is parallel to the branches 12b, 12d that is to say perpendicular to the axes of rotation 15 of the rollers 14.
    Two gripping handles 18 are fixed at the base 12a and a handle 19 is fixed at the legs 12e of the additional branch 12d.
    The second portion 13 of the support is mounted between the branches 12b of the first portion 12, the second portion 13 having a generally U-shape and comprising a base 13a on either side of which two branches 13b extend. A roller 20 is pivotally mounted about a shaft 21 extending parallel to the axes 15 of pivoting of the rollers 14. The ends of the shaft 21 are engaged in the branches 13b of the second portion 13, the latter thus forming a clevis . The roll 20 is formed of three parts 20a, 20b, 20c pivotable about the shaft 21 independently of each other. In particular, the roller 21 comprises two cylindrical portions 20a, 20b of different diameters, connected by a frustoconical central portion 20c. The portion 20a located near the additional branch 12d has for example a smaller diameter than the portion 20b. The different parts 20a, 20b, 20c are dimensioned so as to ensure a surface continuity of the roll 20.
    The support 12, 13 is equipped with means for adjusting the position of the roller 20. Said adjusting means comprise a nut formed or mounted in the base 13a of the second portion 13 for example, and a screw 22 pivotally engaged in the base 12a of the first part 12. The screw 22 is equipped with a gripping head 23. The screw 22 and the corresponding nut are arranged so that the rotation of the screw 22 allows to change the position of the second part 13 relative to the first portion 12, along the axis of the screw 22, that is to say along an axis perpendicular to the axis of the roller 20.
    In order to guide such displacement in translation, the support 12, 13 may be equipped with guide rods 24 arranged for example laterally on either side of the screw 22 and the nut. In particular, the rods 24 can be fixed to the base 12a of the first part 12 and be engaged in holes of corresponding section or in guide rings of the second part 13.
    In the same way, the tool can allow adjustment in the axial direction, for example, between the parts 12d and 12b, one could also have a means of adjustment that would allow to adapt the invention to different sizes of housing.
    As shown in FIG. 6, such a device 11 can be used to form the layer 6 of abradable material of a fan casing 1 of a turbomachine, such as an airplane turbojet engine.
    In the case illustrated in FIG. 6, the fan casing 1 is arranged in such a way that its axis extends vertically, abradable material in the form of a paste being applied, for example in portions 7, over an area to be covered by example on the radially inner skin of a panel 5 of the fan casing 1. The abradable material used is for example a polymer material based on epoxy resin and comprising hollow beads, for example hollow glass balls.
    The device 11 mentioned above is then placed on the casing 1 so that the roller 20 extends along the axis of the casing 1, the rollers 16 rest on one of the end flanges 3, 4 of the casing 1 and that the rollers 14 bear on the radially inner surface 2 of the housing 1, axially on either side of the panel 5 carrying the abradable material.
    The rollers 14, 16 are held in contact with the relevant zones of the casing 1 by the support of an operator on the handles 18, 19. The handles 18 thus serve to radially hold the device 11 on the inner surface 2 of the casing 1 and the handle 19 serves to axially hold the device 11 on the corresponding end flange 3, 4.
    The device 11 is then moved relative to the casing 2 over the entire periphery of the casing 1 so as to flatten the abradable material in paste form and define the layer of abradable material 6. During this step, the different parts 20a, 20b, 20c of the roller 20 pivot about their axis 21 and press or push the malleable paste. It will be noted that the formation of the roll 20 in several parts 20a, 20b, 20c makes it possible to limit the sliding phenomena at the interface between the roll 20 and the abradable material, so as to avoid the peeling or tearing of abradable material during its application.
    One or more blank passes, then one or more finishing passes can be made successively. For this purpose, the radial position of the roller 20 with respect to the cylindrical surface on which the abradable material is affixed may be adjusted between each pass by means of the adjusting screw 23. At the end of the different passes, the surface radially inner layer of abradable material 6 has two cylindrical sections 8, 9 of different diameters and a frustoconical section 10 connecting the two cylindrical sections (Figure 2).
    The abradable layer 6 is then allowed to air dry so that it hardens and has the necessary mechanical characteristics.
    Figure 7 illustrates an alternative embodiment in which the housing 1 is positioned so that its axis extends horizontally. The invention thus proposes a device and a method making it possible to easily and quickly form the layer of abradable material 6 of a turbomachine fan casing 1 for example.
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    1. Device (11) for applying abradable material, intended for the application of abradable material on a surface of a turbomachine annular casing (1), the casing extending along a longitudinal axis, the device (11) comprising a support (12, 13) equipped with first guiding means (14) able to guide the support (12, 13) with respect to a casing (1), in a direction radial to the casing axis, support (12, 13) being provided with second guiding means (16) able to guide the support (12, 13) relative to the casing (1) in an axial direction of the casing, an application roller (20) being mounted pivoting relative to the support (12, 13) in the axial direction, adjusting means (22, 23) for adjusting the position of the roller (20) relative to the first guide means (14), in the radial direction .
    [2" id="c-fr-0002]
    2. Device (11) according to claim 1, characterized in that the first guide means comprise rolling means (14) adapted to bear on the housing (1) in the radial direction and adapted to move on said housing (1).
    [3" id="c-fr-0003]
    3. Device (11) according to claim 1 or 2, characterized in that the second guide means comprise rolling means (16) adapted to bear on the housing (1) in the axial direction and able to move on said housing (1).
    [4" id="c-fr-0004]
    4. Device (11) according to one of claims 1 to 3, characterized in that the support comprises a first portion (12) and a second portion (13) movable in the radial direction relative to the first portion (12). , the roller (20) being pivotally mounted on the second portion (13) of the support, the first guide means (14) and the second guide means (16) being mounted on the first portion (13) of the support.
    [5" id="c-fr-0005]
    5. Device (11) according to claim 4, characterized in that the adjusting means (22, 23) are mounted between the first portion (12) and the second portion (13) of the support and are designed to adjust the position of the second portion (13) relative to the first portion (12) in the radial direction.
    [6" id="c-fr-0006]
    6. Device (11) according to claim 5, characterized in that the adjusting means comprise at least one screw (22) cooperating with at least one nut, the pivoting of the screw (22) relative to the nut driving the nut. translational movement of the second portion (13) relative to the first portion (12).
    [7" id="c-fr-0007]
    7. Device (11) according to claim 5 or 6, characterized in that it comprises means (24) for guiding the second part (13) in translation relative to the first part (12), in the radial direction. .
    [8" id="c-fr-0008]
    8. Device (11) according to one of claims 1 to 7, characterized in that the support (13, 14) comprises gripping means, for example at least one handle (18, 19).
    [9" id="c-fr-0009]
    9. Device (11) according to one of claims 1 to 8, characterized in that the roller (20) comprises at least two parts (20a, 20b, 20c) capable of pivoting independently of one another, by at least one cylindrical portion (20a, 20b) and at least one frustoconical portion (20c).
    [10" id="c-fr-0010]
    10. A method of applying abradable material to a turbomachine casing (1), comprising the steps of: - applying paste of abradable material (6, 7) on an annular surface of the casing (1), - to assemble a device (11) according to one of claims 1 to 9 on the housing (1), so that the first guide means (14) bear radially on an annular surface (2) of the housing (1), for example a radially inner surface (2), and so that the second guide means (16) bear axially on a bearing surface of the housing (1) for example on an end flange (3, 4 ) of the housing (1), - relatively move the device (11) relative to the housing (1) so that the roller (20) pivots and bears against the abradable material (6, 7) in the form of paste the roll (20) thus distributing the abradable material (6, 7) in paste form on the corresponding surface.
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    同族专利:
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    BR112018017149A2|2018-12-26|
    US20190047016A1|2019-02-14|
    CN108779781A|2018-11-09|
    CA3015217A1|2017-08-31|
    WO2017144801A1|2017-08-31|
    JP2019511957A|2019-05-09|
    EP3420236A1|2019-01-02|
    RU2730194C1|2020-08-19|
    US11045831B2|2021-06-29|
    EP3420236B1|2022-02-09|
    CN108779781B|2020-06-09|
    引用文献:
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    CN111940228A|2020-07-14|2020-11-17|中国人民解放军第五七一九工厂|Aero-engine fan casing sealant forming tool and vacuum filling device|
    法律状态:
    2017-02-13| PLFP| Fee payment|Year of fee payment: 2 |
    2017-08-25| PLSC| Publication of the preliminary search report|Effective date: 20170825 |
    2018-01-23| PLFP| Fee payment|Year of fee payment: 3 |
    2018-09-14| CD| Change of name or company name|Owner name: SAFRAN AIRCRAFT ENGINES, FR Effective date: 20180809 |
    2019-01-23| PLFP| Fee payment|Year of fee payment: 4 |
    2020-01-22| PLFP| Fee payment|Year of fee payment: 5 |
    2021-01-20| PLFP| Fee payment|Year of fee payment: 6 |
    2022-01-19| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1651430|2016-02-22|
    FR1651430A|FR3048018B1|2016-02-22|2016-02-22|DEVICE FOR APPLYING ABRADABLE MATERIAL TO A SURFACE OF A TURBOMACHINE CASING|FR1651430A| FR3048018B1|2016-02-22|2016-02-22|DEVICE FOR APPLYING ABRADABLE MATERIAL TO A SURFACE OF A TURBOMACHINE CASING|
    RU2018132029A| RU2730194C1|2016-02-22|2017-02-17|Device for application of abradable material on surface of gas turbine housing|
    BR112018017149-2A| BR112018017149A2|2016-02-22|2017-02-17|abradable material application device and abradable material application method|
    CN201780012637.4A| CN108779781B|2016-02-22|2017-02-17|Device for applying wear-resistant material to surface of turbine engine casing|
    PCT/FR2017/050353| WO2017144801A1|2016-02-22|2017-02-17|Device for applying abradable material to a surface of a turbomachine casing|
    JP2018544180A| JP6899836B2|2016-02-22|2017-02-17|Equipment for applying abradable material to the surface of a turbine engine casing|
    EP17709157.6A| EP3420236B1|2016-02-22|2017-02-17|Device for applying abradable material to a surface of a turbomachine casing|
    CA3015217A| CA3015217A1|2016-02-22|2017-02-17|Device for applying abradable material to a surface of a turbomachine casing|
    US16/078,451| US11045831B2|2016-02-22|2017-02-17|Device for applying abradable material to a surface of a turbine engine casing|
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