• 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 present invention relates to a method of manufacturing a strainer (1), such as a strainer (1) of an ejector (2) used to transfer fuel between two tanks of an aircraft or for fuel supply an engine, said strainer (1) comprising a duct (3) whose first end is intended to be connected to an inlet (9) of the ejector (2), and a second end of which is housed in a housing ( 4) comprising an open face (5) for the passage of fuel, the open face (5) being closed by a gate (6) acting as a filter. According to the invention, the method consists of manufacturing the duct (3), the casing (4) and the grid (6) of the strainer (1) in a single piece.
    公开号:FR3049982A1
    申请号:FR1653187
    申请日:2016-04-12
    公开日:2017-10-13
    发明作者:Francois Corman
    申请人:Zodiac Aerotechnics SAS；
    IPC主号:
    专利说明:

    PROCESS FOR MANUFACTURING A CREPINE CREPINE. AND EJECTOR COMPRISING SUCH A CREPINE
    Technical area
    The present invention relates to the technical field of aeronautics, and more particularly relates to a method of manufacturing a strainer, such as a strainer of an ejector used for the transfer of fuel between two fuel tanks of an aircraft or for fueling an engine. The invention also relates to an improved strainer, and an ejector comprising such a strainer. The strainer according to the invention may be subject to any type of device requiring filtration before the passage of a fluid, such as for example a pump, or to a rupture disc calibrated to burst at a predetermined pressure, implemented in a pressurized installation.
    Previous art
    In the field of aeronautics, it is known to use ejectors powered by an engine flow, provided for example by a reactor outlet or by a pump for transferring fuel between two fuel tanks of an aircraft
    Indeed, when the tank group of the aircraft is composed of several tanks, it is necessary that the fuel is transferred from tanks to tanks, in particular by means of an ejector. The ejector is powered by a fuel flow and operates according to the principle of the Venturi effect. The fuel flow in particular passes into a frustoconical injector with a calibrated output diameter, smaller than the diameter of the inlet, to accelerate the flow of fuel. The outlet of the injector communicates with a secondary inlet of the ejector, arranged orthogonally to the outlet flow of the injector, and from which is sucked, by Venturi effect, a second flow of fuel which is present in a first tank. The two fuel streams are mixed and then propelled into an ejector diffusion line, coaxially arranged at the outlet of the injector with an outlet neck having a flared frustoconical shape to slow the flow. The outlet neck communicates with a second tank for transferring the fuel. The main advantage of this type of ejector is that it does not wear out and that it does not require any maintenance because it operates without moving mechanical parts. It also presents no risk of fire or explosion because it works without an electric motor. It can thus be placed in areas with explosive atmosphere, and possibly difficult to access.
    Preferably, the secondary inlet of the ejector is secured to a strainer comprising a conduit whose one end is intended to be connected to the secondary inlet of the ejector, and a second end of which is housed in a housing comprising a open face, preferably facing the end of the duct, for the passage of fuel. The open face of the housing is closed by a metal grid acting as a filter. The housing is intended to be immersed in a first fuel tank.
    From the above, a strainer comprises several components assembled to each other. Each of these components must be managed from a design, validation, manufacturing, supply, storage point of view. For example, each component has undergone, for its design, various molding, machining, forming, etc. operations.
    In order to manufacture the strainer, assembly and assembly operations are necessary, and involve the use of additional components, such as screws, washers, seals, etc. and / or specific operations, such as crimping operations, etc. requiring adapted tools and machines.
    As a result, the design and manufacture of a strainer is long, expensive and time-consuming. In addition, it was found that the electrical continuity between the components of the strainer was not sufficient so that it requires the implementation of protections and additional surface treatments, further complicating the manufacturing process, and increasing does its cost.
    One of the aims of the invention is therefore to remedy these drawbacks by proposing a method of manufacturing a strainer, such as an ejector strainer, which is simple, fast and inexpensive, and which provides a reliable strainer with optimum electrical continuity. To this end, and to solve the aforementioned problems, it has been developed a method of manufacturing a strainer, for example a strainer of an ejector used to transfer fuel between two tanks of an aircraft or for the fuel supply of an engine. The strainer comprises a conduit whose first end is, for example, intended to be connected to an inlet of the ejector, and a second end is housed in a housing comprising an open face for the passage of fuel. The open face of the housing is closed by a grid acting as a filter.
    According to the invention, the method is remarkable in that it consists in manufacturing the duct, the housing and the grid of the strainer in one single piece, preferably in metallic material, for example aluminum.
    In this way, the method of manufacturing the strainer according to the invention implements only one part. In other words, there is only one part to manage from the point of view of design, validation, manufacture, supply, storage. The manufacture is simple, fast and inexpensive. In addition, since the strainer is formed in one piece without fastening means, the electrical continuity is optimal, and the strainer is lighter. The invention makes it possible to avoid handling and assembly operations, as well as to improve the repeatability of the process.
    Advantageously, the strainer is manufactured at the same time as a fuel ejector, with the first end of the duct of the strainer connected integrally with an inlet of the ejector. This makes it possible to integrate the strainer in the design of the ejector and no longer have to manage it as an independent piece. Furthermore, the fasteners between the strainer and the ejector are removed, which further facilitates the manufacture and allows to minimize the cost. The invention finally provides an ejector used for example for transferring fuel between two tanks of an aircraft, or for the fuel supply engine. The ejector comprises an injector with an inlet, forming a main inlet of the ejector, and having a calibrated diameter, and a frustoconical outlet with a smaller diameter. The output of the injector is in communication, on the one hand, with a so-called secondary input of the ejector arranged orthogonally to the output of the injector and, on the other hand, with a diffusion duct arranged in a coaxial manner. at the outlet of the injector, with an outlet neck having a flared frustoconical shape.
    According to the invention, the secondary inlet of the ejector is connected to a strainer formed in a single piece part, with said strainer which also forms a single part with at least said secondary inlet.
    Thus, the number of parts is further decreased which allows to further increase the advantages of the present invention.
    From the above, the invention aims to protect a strainer in a wide manner, the conduit, the housing and the grid of the strainer are made in one piece, forming advantageously integral part of an ejector, regardless of the manufacturing technique implemented.
    Preferably, and to simplify the design and manufacture, and further reduce the cost, the manufacturing process is advantageously carried out by a layer-by-layer additive manufacturing technique.
    BRIEF DESCRIPTION OF THE FIGURES Other advantages and features will become more apparent from the following description, given by way of non-limiting example, of the strainer and the ejector according to the invention, from the appended drawings in which: Figure 1 is a schematic representation in longitudinal section of the strainer according to the invention; - Figure 2 is a schematic representation in longitudinal section of an ejector according to the invention, incorporating the strainer; - Figure 3 is a schematic representation in perspective of an ejector assembly and monobloc strainer according to the invention.
    DETAILED DESCRIPTION OF THE INVENTION The invention relates to a strainer (1) in a broad manner, without limitation as to its application, and will be described in connection with an ejector (2) used for the transfer of fuel between two fuel tanks. of an aircraft or for the supply of fuel to an engine. The strainer (1) according to the invention is manufactured in one piece, and preferably in metallic material, for example aluminum. The strainer (1) may be subject to any device requiring filtration before the passage of a fluid, such as for example a pump or a rupture disc.
    With reference to FIGS. 1 and 2, the strainer (1) comprises a duct (3), one end of which is housed in a casing (4). The housing (4) comprises a generally cylindrical shape, coaxial with the conduit (3), and has an open face (5) facing the end of the conduit (3) for the passage of fuel. The open face (5) is closed by a grid (6) to act as a filter. The end of the duct (3) which is housed in the casing (4) comprises a neck (7) of flared frustoconical shape.
    The conduit (3), the housing (4), and the grid (6) are made in one piece to form a single piece.
    With reference to FIGS. 2 and 3, the end of the strainer (1) which is not housed in the casing (4) is, for example, intended to be connected to an inlet of an ejector (2).
    More specifically, and with reference to FIG. 2, an ejector (2) is used to transfer fuel between two tanks of an aircraft and comprises an injector (8), in the form of a duct (8a), with a inlet having a calibrated diameter, and a frustoconical outlet with a diameter smaller than the diameter of the inlet. The injector (8) is intended to be connected to a pump which feeds it with a fuel flow. The conformation of the injector (8) makes it possible, at the output, to accelerate this flow of fuel.
    The outlet of the injector (8) is in communication, on the one hand, with a secondary inlet (9) of the ejector (2) arranged orthogonally to the outlet of the injector (8) and, on the other hand with a diffusion duct (10) arranged coaxially with the outlet of the injector (8), with an outlet neck (11) having a flared frustoconical shape. The secondary inlet (9) of the ejector (2) is connected with the duct (3) of the strainer (1), whose housing (4) is immersed in a first fuel tank. The outlet of the ejector (2) communicates with a second tank for fuel transfer as such.
    The accelerated fuel flow from the injector (8) causes suction by a Venturi effect of a second fuel flow which passes through the grid (6), the casing (4) and the duct (3) of the strainer ( 1). The mixture of fuel flows is propelled into the duct (10) diffusion and is slowed at the output, because of the outlet neck (11) flared, for its transfer into the second tank.
    Advantageously, the strainer (1) is manufactured in one piece with the secondary inlet (9) of the ejector (2).
    The manufacturing technique used consists, for example, of an additive manufacturing technique, layer by layer.
    The strainer (1) according to the invention comprises a single piece so that its design, validation, manufacture, supply and storage are facilitated. The manufacture is simple, fast and inexpensive. In addition, since the strainer (1) is formed in one piece without fastening means, the electrical continuity is optimal and the strainer (1) is lighter. These advantages are amplified if the strainer (1) is integral and monobloc with the ejector (2).
    权利要求:
    Claims (6)
    [1" id="c-fr-0001]
    1. A method of manufacturing a strainer (1), such as a strainer (1) of an ejector (2) used to transfer fuel between two tanks of an aircraft or for supplying fuel to a fuel tank. motor, said strainer (1) comprising a duct (3) whose first end is intended for example to be connected to an inlet (9) of the ejector (2), and a second end is housed in a housing (4). ) comprising an open face (5) for the passage of fuel, the open face (5) being closed by a grid (6) acting as a filter, the method being characterized in that it consists in manufacturing the conduit (3) , the housing (4) and the grid (6) of the strainer (1) in a single piece.
    [2" id="c-fr-0002]
    2. Method according to claim 1, characterized in that the duct (3), the housing (4) and the grid (6) of the strainer (1) are made of a metal material, preferably aluminum.
    [3" id="c-fr-0003]
    3. Method according to one of the preceding claims, characterized in that the strainer (1) is manufactured at the same time as an ejector (2), with the first end of the duct (3) of the strainer (1) connected to monobloc manner with an inlet (9) of the ejector (2).
    [4" id="c-fr-0004]
    4. Method according to one of the preceding claims, characterized in that the manufacture is carried out by an additive manufacturing technique, layer by layer.
    [5" id="c-fr-0005]
    Strainer (1), such as a strainer (1) for ejector (2) used for transferring fuel between two tanks of an aircraft or for supplying fuel to an engine, said strainer (1) comprising a duct (3) whose first end is intended to be connected to an inlet (9) of the ejector (2), and a second end of which is housed in a housing (4) comprising an open face (5) for the passage of the fuel, the open face (5) being closed by a gate (6) acting as a filter, characterized in that the conduit (3), the housing (4) and the grid (6) of the strainer (1) are made in one piece.
    [6" id="c-fr-0006]
    An ejector (2) for transferring fuel between two tanks of an aircraft or for supplying fuel to an engine, said ejector (2) comprising an injector (8) with an inlet, forming a main inlet of the ejector (2), and present a calibrated diameter, and a frustoconical outlet with a smaller diameter, the output being in communication, on the one hand, with a so-called secondary input (9) of the ejector (2) arranged orthogonally at the outlet of the injector (8) and, secondly, with a diffusion duct (10) arranged coaxially with the outlet of the injector (8), with an outlet neck (11) having a frustoconical flared shape, characterized in that the secondary inlet (9) is connected to a strainer (1) according to claim 5, with said strainer (1) forming integral and integral part with at least said secondary inlet (9 ).
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    同族专利:
    公开号 | 公开日
    FR3049982B1|2020-01-17|
    CN107288792A|2017-10-24|
    JP2017189767A|2017-10-19|
    US20170291714A1|2017-10-12|
    CA2963557A1|2017-10-12|
    RU2017112343A|2018-10-11|
    US10597165B2|2020-03-24|
    RU2017112343A3|2020-07-28|
    RU2740653C2|2021-01-19|
    EP3232045B1|2020-04-22|
    EP3232045A1|2017-10-18|
    CN107288792B|2021-06-25|
    引用文献:
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    US11015534B2|2018-11-28|2021-05-25|General Electric Company|Thermal management system|
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    法律状态:
    2017-04-27| PLFP| Fee payment|Year of fee payment: 2 |
    2017-10-13| PLSC| Search report ready|Effective date: 20171013 |
    2018-05-02| PLFP| Fee payment|Year of fee payment: 3 |
    2019-04-30| PLFP| Fee payment|Year of fee payment: 4 |
    2020-03-19| PLFP| Fee payment|Year of fee payment: 5 |
    2021-03-23| PLFP| Fee payment|Year of fee payment: 6 |
    2021-04-23| CA| Change of address|Effective date: 20210318 |
    2021-04-23| CD| Change of name or company name|Owner name: SAFRAN AEROTECHNICS SAS, FR Effective date: 20210318 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1653187A|FR3049982B1|2016-04-12|2016-04-12|METHOD OF MANUFACTURING A STRAINER, STRAINER, AND EJECTOR COMPRISING SUCH A STRAINER|
    FR1653187|2016-04-12|FR1653187A| FR3049982B1|2016-04-12|2016-04-12|METHOD OF MANUFACTURING A STRAINER, STRAINER, AND EJECTOR COMPRISING SUCH A STRAINER|
    EP17165296.9A| EP3232045B1|2016-04-12|2017-04-06|Method for manufacturing a strainer and an ejector comprising such a strainer|
    CA2963557A| CA2963557A1|2016-04-12|2017-04-07|Fabrication process for strainer, strainer and ejector including such a strainer|
    JP2017078536A| JP2017189767A|2016-04-12|2017-04-11|Method of manufacturing strainer, strainer, and ejector comprising such strainer|
    RU2017112343A| RU2740653C2|2016-04-12|2017-04-11|Method of producing a mesh filter, a mesh filter and an ejector assembly comprising such a mesh filter|
    US15/485,986| US10597165B2|2016-04-12|2017-04-12|Method of manufacturing a strainer, a strainer, and an ejector comprising such a strainer|
    CN201710236747.0A| CN107288792B|2016-04-12|2017-04-12|Method of manufacturing filter, and injector including the filter|
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