• 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 ceramic material (1) is divided into independent sections (10) joined to the metal structure (2) of the rudder via a connection arrangement (8, 9) and intermediate parts (13). A mechanical connection device between a ceramic material (1) and a metal, especially for the front edge of a rudder, has the ceramic material divided into independent sections, each of which is joined to a metal structure and combined together using a connection arrangement with a given configuration. Intermediate parts are provided between the connection arrangement members.
    公开号:NL9102111A
    申请号:NL9102111
    申请日:1991-12-18
    公开日:2002-05-01
    发明作者:Patrick Bernard；Jean Viala
    申请人:Aerospatiale Sociutu Nationale；
    IPC主号:
    专利说明:

    Title: Mechanical connection device between a ceramic material and a metal, in particular for realizing a control part of a guided weapon.
    The invention relates to a mechanical connection device between a ceramic material and a metal, more in particular a connection, which is intended to be subjected to a strong load and is more particularly capable of applying the ceramic material to the ensure the leading edge of a rudder. This mechanical connection device could also be realized with a number of metallic materials or between a composite material and a metal.
    It is acknowledged that the aerodynamic rudders, more particularly the rudders of aircraft, are subjected to a very high load, on the one hand on mechanical terrain because they are subjected to great stresses, which are a consequence of the forces they undergo during the flight, and inertial forces, as well as vibrations, and on the other hand on thermal terrain due to kinetic heating. This is the reason why the leading edges of the rudders are provided with or are formed by ceramic materials, which have a high mechanical resistance and counteract thermal loads in a good way. However, these ceramic materials must be stably connected to the metallic component on which they are mounted, and it appears that in the case of strong loads, the connection region or connection regions between the ceramic material and the metal form weak regions which unacceptable and where the actual physical type technologies do not allow the thermomechanical behavior of the connection.
    The invention therefore has for its object to avoid these drawbacks by providing a mechanical connecting device between a ceramic material or the like and a metal, more particularly for a front edge of a rudder, which device furthermore has the advantage that use can be made of a Certain ceramic material, which is designed, for example, to absorb radar waves.
    A main object of the invention is therefore to provide a mechanical connection device between ceramic material and a metal, more particularly for realizing a leading edge of a rudder, in which device the ceramic material is split into a number of independent elements, wherein each element is made into a whole with a metallic structure, namely by means of connectors with a specific configuration, with intermediates being present between said connectors.
    According to another particular feature of the invention, each element extends rearwardly into a cam that fits into the interior of a groove extending transversely along the length of the rudder into the interior of the metallic structure, the groove facing its forward-facing opening is surrounded by collars intended to ensure a coupling of shoulders that are present on the ridge of the ceramic element.
    It is noted that it is advantageous for an intermediate product to be located at least between the cam and the grooves of the groove as well as on the bottom of the groove.
    According to another particular feature of the invention, the intermediate product is arranged in a non-continuous manner in the form of blocks, separated from each other by "gaps" 11, in accordance with a center line parallel to the leading edge.
    The invention will be explained in more detail below with reference to the drawing. In the drawing: Fig. 1 shows a schematic top view of a rudder; Fig. 2 is a schematic section through II-II of Fig. 1; Fig. 3 shows a cross-section according to Fig. 2, wherein the mechanical connecting device according to the invention is indicated; and Fig. 5 is a schematic top view of a rudder according to the invention.
    Figures 1 and 2 schematically show the leading edge 1 of a rudder of a projectile, which is connected to the metallic structure 2 of the rudder by a connecting area 3. The panels 4 on the underside and the panels 5 on the top are subjected mechanical stresses indicated by arrows 6, while the external thermal fluxes influence the entire structure (arrows 7).
    The connecting device according to the invention is shown in Figures 3, 4 and 5. The ceramic material 1, which forms the leading edge, which is subjected to the aerodynamic flow (speed V) is split into a number of parts or elements 10, each of which these parts extend towards the rear side in accordance with the center line X in a projection 8, which can cooperate with the interior of a groove 9, which extends transversely along the rudder on the inside of the metal structure 2. The cam and the groove form a connector with a certain configuration between the ceramic element and the metallic structure. The groove with a thickness c, considered parallel to a vertical axis Y, is surrounded at the front-facing opening thereof by collars 11 which limit its entrance to a smaller thickness d. The cam 8, in turn, is profiled in such a way that shoulders 12 with a thickness a are formed, which can rest against the collars 11 where they establish a coupling to anchor the ceramic element 10 to the metallic structure. An intermediate product 13, for example an elastomer, is located at the interfaces of the functional surfaces which form the connection between the ceramic material and the metal, that is, between the cam 8 (at the level of the shoulders 12 and the central core). 14 with a thickness b) and the collars 11. The thicknesses a and b of the cam 8 of ceramic material determine, as is clear, the mechanical behavior of the front edge. The rigidity of the connection region 3, in a plane X Y transverse to the structure, is a function of the thickness J 1 of the intermediate product 13 between the cam 8 and the collars n. On the other hand, the rotational stiffness, that is to say about an axis parallel to the axis X, is ensured by a discrete and non-continuous arrangement of the intermediate product 13 (blocks 13, separated by gaps 15, consisting of pierced, very flexible material). blocks) according to the axis Z of the grooves 9, as is more particularly apparent from Figure 4. The fact that the leading edge is realized by a number of elements 10, each of which is provided with a number of blocks, and this at the thickness J2 of the intermediate product, separated by the gaps, contributes to any deformation of the metallic structure of the rudder is supported by the ceramic elements.
    A certain clearance J3 between the elements 10 and the exposed parts 16, which are present on the surfaces of the said elements, makes them independent of each other - without contact between them.
    If it is intended to provide a leading edge which is intended to absorb radar waves, the elements 10 are manufactured from a ceramic material which absorbs radar waves and an intermediate product with a specific conductivity can be used. The arrangement of this product 13 in an area behind the cam, in the groove 9, contributes by its volume to the electromagnetic adjustment of the connection.
    With such a construction, the thermal loads do not affect the connection itself. These loads are transferred to each part, whereby one can consider each system consisting of a ceramic material and a metal, each part having to satisfy the thermal environment separately. A deformation of the metallic structure does not lead to a load on the ceramic elements.
    Incidentally, splitting a part into elements, which is not necessary for a connection with a small length, is a requirement for the behavior of a connection with a large length.
    It is obvious that different ceramic materials and the corresponding intermediates thereof can be used to realize the different elements which form the same leading edge.
    权利要求:
    Claims (7)
    [1]
    Mechanical connection device between a ceramic material and a metal, more particularly for realizing a leading edge of a rudder, characterized in that the ceramic material (1) is split into a number of independent elements (10), each of which element with a metallic structure (2) is united in one piece by connecting members (8, 9) with a specific configuration, with intermediates (13) being present between the connecting members.
    [2]
    Connecting device according to claim 1, characterized in that each element (10) extends rearwardly into a cam (8) which cooperates with the interior of a groove (9) which extends the rudder in the transverse direction. interior of the metallic structure (2).
    [3]
    Connecting device as claimed in claims 1 and 2, characterized in that the groove (9) is surrounded at its forward-oriented opening by collars (11) which are intended for the coupling of shoulders (12) which are on the cam (8) of the ceramic element.
    [4]
    Connecting device according to claims 1-3, characterized in that the intermediate product (13) is at least between the cam (8) and the collars (11), at thicknesses J1 and J2, and on the bottom of the groove.
    [5]
    Connection device according to claims 1 and 4, characterized in that the intermediate product (13) corresponds to an axis Z which is parallel to the front edge in a non-continuous manner in the form of blocks separated from each other by gaps (15) is carried out.
    [6]
    Connecting device according to claim 1, characterized in that a clearance J3 is present between the elements (10) and exposed parts (16), which are located on the surfaces of the elements, to make them independent of each other.
    [7]
    Connection device according to claim 1, characterized in that the independent elements (10) can consist of different ceramic materials.
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    同族专利:
    公开号 | 公开日
    NL194702B|2002-08-01|
    ITMI913106D0|1991-11-20|
    ITMI913106A1|1993-05-21|
    NL194702C|2002-12-03|
    CA2057762A1|1992-06-19|
    FR2825760A1|2002-12-13|
    SE9103658L|2002-02-13|
    IT1316422B1|2003-04-10|
    DE4141166B3|2006-04-06|
    SE519890C2|2003-04-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB914548A|1960-03-04|1963-01-02|Daimler Benz Ag|Improvements relating to wheel discs with ceramic blades for axial-flow machines|
    US3430898A|1967-05-01|1969-03-04|Us Navy|Leading edge for hypersonic vehicle|
    DE2108176A1|1971-02-20|1972-08-31|Motoren Turbinen Union|Fastening of ceramic turbine blades|
    US4790723A|1987-01-12|1988-12-13|Westinghouse Electric Corp.|Process for securing a turbine blade|
    US4854765A|1987-07-13|1989-08-08|The Boeing Company|Reversible thermal compensation joint|
    法律状态:
    2002-05-01| A1C| A request for examination has been filed|
    2005-09-01| V1| Lapsed because of non-payment of the annual fee|Effective date: 20050701 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR9015816|1990-12-18|
    FR9015816A|FR2825760A1|1990-12-18|1990-12-18|Connection device for securing ceramic material to front edge of rudder for aircraft, joins sections of ceramic material to the metal rudder structure|
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