• 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 assembly gantry comprises two posts (1) parallel, a horizontal beam (6) connecting their top and movable vertically, and a swing (17) movable along the movable beam in the lateral direction and also able to rotate the engine (M) mounted on it around the main axes. A lifting hoist (10) is provided with a load sensor raised to record the total weight of the engine (M). The device advantageously comprises trajectory calculation means, integrating the structural deformations due to the weight lifted, to correct the docking paths of the modules and make them very accurate.
    公开号:FR3043000A1
    申请号:FR1560377
    申请日:2015-10-29
    公开日:2017-05-05
    发明作者:Stephane Andre Baucher；Eric Berthe；Clement Paul Claude Guinot；Manuel Daniel Martins
    申请人:SNECMA SAS；
    IPC主号:
    专利说明:

    PORTIC ASSEMBLY ENGINE DESCRIPTION
    The subject of the present invention is an assembly gantry of an engine, designed more specifically for large-scale revolution-shaped engines, such as aircraft turbomachines, without any other applications being excluded.
    Such engines are composed of several bulky and heavy modules and which must be assembled together. The modules arrive at the assembly site on trolleys, are raised, and docked to each other to achieve assembly. High positioning accuracy is necessary, as well as a delicate handling because of the fragility of some constituents of the modules. This is difficult to accomplish on large and heavy parts. Existing assembly gantries are somewhat inadequate in this respect. An example is described in document FR 2 952 842 A.
    Positioning inaccuracies arise from several causes. Modules are first subjected to oscillations once they are raised. Their weight then deforms, in a non-negligible way, the gantries when it supports them, which makes the docking positions of the modules unpredictable. Other drawbacks of the known porticos relate to difficulties of access to the modules, either from the bottom once they are mounted on the gantry, or at certain places of their periphery.
    A fundamental object of the invention is therefore to provide a gantry that offers the accuracy and repeatability of positioning necessary for smooth docking of modules. Another purpose, related to the previous one, is to precisely place the modules already mounted on the gantries at different positions or different orientations, in order to achieve the successive assemblies in various conditions according to the assembly phase and the engine version to assemble .
    In a general form, the invention relates to an assembly gantry of an engine, the gantry comprising: a horizontal beam; two poles; two guide and rise-and-fall means each connecting one end of the beam to one of the posts; a carriage resting on the beam and moving along the beam; a swing suspended on the carriage; means for rotating the swing seat about a vertical axis connecting the swing seat to the carriage, the swing comprising a cradle for fixing the motor; and at least one, advantageously two hoist hoists placed on the beam and movable along the beam.
    This combination of means makes it possible to obtain to a large extent the qualities and advantages mentioned at the moment. The module mounted on the cradle can be oriented and moved horizontally and vertically. The hoists offer the same possibilities of movement to another module (or to any equipment that is attached to them) which makes it possible to approach the modules one of the other, while keeping them at specific positions. Berthing is therefore facilitated. The use of a beam on which slide the support of the hoists and the mobile carriage support of the swing contributes to the relative good positioning of the modules. The posts and the beam can be designed very rigid and therefore subject to little deformation, and their cohesion makes these deformations predictable and reproducible identical load raised, which can be exploited as will be detailed below.
    According to an improvement, the carriage comprises a first portion connected to the beam and a second portion connected to the vertical axis, and means for moving the second portion relative to the first in a horizontal direction perpendicular to the beam. The module mounted on the cradle can then be moved laterally, which further increases the freedom of positioning.
    The same applies if the cradle comprises a first part connected to the vertical axis, a second part carrying means for fixing the motor, and a means of moving the second part along the first part, the second part being supported by the first part, the first part and the second part being arched.
    An important improvement is realized if the hoists carry a load sensor that they raise, especially if this sensor is a triaxial sensor of the raised load. The knowledge of this weight makes it possible to evaluate the deformation of the supports and therefore the movements that must be introduced to obtain a precise docking of the modules. In addition, horizontal force monitoring indicates the presence and extent of berthing.
    The stiffening of the gantry is increased by adding junction beams to connect the columns together, the junction beams comprising oblique beams having cross directions.
    The dockings can then advantageously be accomplished almost automatically by a digital device associated with gantries, which can be designed to impose the movements necessary for docking with high precision, by moving the components of the gantry. This device comprises digital means for automatic displacement correction, according to the weight of the loads lifted by the hoists and supported by the cradle. Indeed, the knowledge of the loads, joined to a good repeatability of the deformations, makes it possible to calculate these.
    The repeatability of the deformations is guaranteed in particular if the means for moving the elements of the gantry comprise, between two parts that they connect, intermediate rolling guide means mounted without play and prestressed.
    The various aspects, features and advantages of the invention, including those which have been indicated above and others, will now be described in more detail by means of the following figures, which show a particular embodiment of the invention given to illustrative title: - Figure 1 is a general view of the gantry; FIG. 2 illustrates the mobile carriage carrying the assembled modules; - Figure 3 is a general view of the swing; - Figure 4 illustrates the main support cradle modules; - Figure 5 illustrates a device for fixing the modules; - Figure 6 shows in section the mechanism of the main cradle; - Figure 7 is another view of the swing; - Figure 8 illustrates the auxiliary cradle; - Figure 9 illustrates a setting cylinder; - Figure 10 illustrates the hoist main hoist; - Figure 11, the bottom of said hoist; - Figure 12 illustrates the auxiliary hoist; - Figure 13 illustrates the mounting of the horizontal beam on the gantry; and FIG. 14 represents the gantry control device.
    FIG. 1. The portico comprises two posts 1, similar, parallel and essentially vertical, each composed of a rising portion 2 rising from a foot 3 fixed to a frame on the ground and having a curvature whose concavity 4 is directed to a motor M being assembled on the gantry, and a vaulted upper part 5 extending between the rising part 2 and a vertical carrying face connecting means to a horizontal beam 6 intended to support the motor M, and that will be described next. This form of post 1, called gooseneck, has a nice appearance, while providing a reduced overhang, good rigidity and a low footprint, which offers great latitude to work around the engine and bring from various places the equipment and modules to be assembled. The rigidity of the gantry is increased by bars 7 connecting posts 1 to each other, and some of which, denoted 8, intersect and are linked to each other at a cross 59, thus strongly opposing the various bending modes. (symmetrical and antisymmetric) poles 1 in the direction of extension of the horizontal beam 6 (X axis of the mark shown). The posts 1 are also particularly rigid with respect to bending in the plane of the other two axes Y and Z of the marker.
    The horizontal beam 6 is movable in vertical translation (Z axis), by means of up-down devices 9, which respectively connect each of its ends to an upper portion 5 of the pole 1. These up-down devices 9 will also be described later.
    The horizontal beam 6 carries two hoists 10 and 11, and a carriage 12. The hoists 10 and 11 are intended to lift various equipment essential for the assembly of the engines. We first look at the carriage 12, which is intended to support the motor M mounted on the gantry, also using Figures 2 and 3. The carriage 12 is movable on a lower track 13 of the horizontal beam 6, which extends in its main extension direction (X). It comprises a lower table 14 directly placed on the lower track 13, and an upper table 15 placed on the lower table 14 and movable horizontally relative to it, in the perpendicular direction (Y). The upper table 15 carries a vertical axis 16 of rotation which extends under the horizontal beam 6 and rotates a part called swing 17 around the vertical axis Z. The swing 17 carries a main cradle 18 and an auxiliary cradle 19 to which the motor M is fixed.
    The description of the main cradle 18 is now given. It comprises, as shown in Figure 4, a first portion 20 extending under the swing 17 and arch-shaped, and a second portion 21 also in the form of a bow, inscribed in the previous and pivotable on it around an axis parallel to the axis X and coincides with the axis of the motor M in the mounted state, which allows to change its roll inclination and that of the motor M, which is suspended. The second part 21 carries for this purpose fixing devices 22 of the motor M at its ends, which are shown in FIG. 5. They comprise an upper clevis 23 bolted to the second part 21, a lower bracket 24 carrying bolts 25 for receive and fix unrepresented attachment points of the motor M, and a rod 26 to which the lower yoke 24 is suspended and which is retained by its upper end in the upper yoke 23. With this device, an excessive descent of the motor M for example, to deposit it on a carriage after assembly, will not cause damage, since the rods 26 will go back in the upper yokes 23 when the engine M will be placed, and they will absorb the over-climbing devices up-down 9.
    FIG. 6 illustrates how the second part 21 is retained by the first part 20. The latter is provided with two pairs of curved rows of rollers, all in arcs of circles around the same central axis, comprising a row of rollers 11 eccentric grooves and a row of concentric rollers 28 grooved on one side, and a pair of straight eccentric rollers 29 and a row of concentric rollers 30 right on the other side. The rollers 27, 28 and 29, 30 are interposed between flanks 20a or 20b of the first portion 20 and parallel flanks 21a or 21b of the second portion 21. Their axes of rotation 31 are mounted on the flanks 20a and 20b of the first portion 20. The second portion 21 is supported precisely by a first rail 32 in an arc, fixed to one of the flanks 21a of the second portion 21 and retained between the rollers 27 and 28 grooved, and a second rail 33, opposite the previous, attached to the other side 21b of the second portion 21 and retained between the rollers 29 and 30 rights. The assembly is carried out with a slight prestress which eliminates the play and thus guarantees a high accuracy of position of the second part 21 with respect to the first part 20 and the movements imposed on them; as will be seen, such assemblies without a set of transmission elements will be used in general between the mutually mobile parts of the gantry, to obtain the same advantages. The lateral position of the second portion 21 is guaranteed by the protruding half-thickness of the first rail 32, which allows it to marry the section of the grooves of the rollers 27 and 28. The second rail 33 is flat. A curved rack 34 is also fixed to the side 21a and it meshes with a pinion 35 by a motor 36 fixed to the first part 20. Thanks to this arrangement, the rotation of the second part 21 on the first part 20 becomes possible. The range of motion can be +/- 70 ° to rotate the M motor mounted on the gantry and place all its parts at a height or orientation facilitating the manual operations of the assembly.
    Referring to Figures 7 and 8. The auxiliary cradle 19 comprises a pair of rigid arms 37 suspended from the swing 17, a first portion 38 suspended from the arms 37, and a second portion 39 sliding on the first portion 38. The parts 38 and 39 are both arched (the first can be short), and have the same rotational movement on each other as the parts 20 and 21 of the main cradle 18. All these parts 20, 21 and 38, 39 in the form of an arch are also coaxial. The ends of the second portion 39 carry fasteners 40 of the motor M, of any kind (there are shown legs provided with an insertion hole of a fixing bolt), and the second portion 39 is suspended to the first part 38 by a rail 41 which it comprises on one side, whose section may be the same as that of the first rail 32 of Figure 6, and which is retained by a recirculating ball guide system ball , However, as the forces of the weight of the engine M undergone by the auxiliary cradle 19 are less important, the guide device is simpler, and also less extended in the angular direction. No drive motor is present, the second part 39 following the rotational movements imposed by the second part 21 of the main cradle 18.
    The swing 17 also includes turnbuckles 42, which can also support the motor M during its assembly between the cradles 18 and 19. They consist of tension rods of adjustable lengths that can be moved in the longitudinal direction of the swing 17 by sliding carriages 44 to which they are suspended on rails 43.
    Electromechanical cylinders 45 are arranged (FIG. 9) under swing 17, so as to be able to hook on the motor M and to vary its pitch by tilting it around the transverse axis Y, by a deployment movement in the X axis. Thus restoring the attitude of the motor M by making its axis of rotation horizontal. There are two of these electromechanical cylinders 45, on either side of the center of the swing 17 and with parallel deployment directions.
    The general description of the main hoist 10 will now be made in connection with Figures 10 and 11. It is mounted on a movable carriage 46 sliding on an upper track 47 of the horizontal beam 6. It comprises a vertical tube 48, which passes through the horizontal beam 6, extends below it and has at its lower end a lifting hook 49 suspended from the rigid tube 48 by an intermediate piece comprising a triaxial force sensor 50. The auxiliary hoist 11 also comprises a movable carriage 51 on the same upper track 47 and a chain 52 that can be unwound under the movable carriage 49 of variable length (Figure 12).
    Returning to FIG. 2, if, in the usual state of the gantry, the hoists 10 and 11 are situated on either side of the mobile carriage 12 and the swing 17, this state is not imposed, since the sliding carriage 12 on the lower track 13, which is located substantially below the upper track 47. By raising the vertical tube 48 and winding the chain 52, it is possible to pass the hoists 10 and 11 above the movable carriage to place both of them on any side of the swing 17. It is also possible to lower them between the rigid arms 37.
    Some technology details will now be given.
    FIG. 13 shows that the horizontal beam 6 is suspended from moving carriages 53 along vertical runners 54, each composed of a pair of parallel rails, established on planar faces of the posts 1. The carriages 53 are retained between the pairs of rails, interposing a ball system in conventional recirculation and not shown. The device further comprises a worm 55 disposed between each of the pairs of rails, driven by a motor 56 fixed to the top of the respective pole 1, and whose rotation raises or lowers a nut fixed to the carriage 53. The ball guides of the The carriages 53 may be prestressed and thus free of play and the motors 56 are synchronized with each other by master-slave variators with absolute encoder and equipped with brakes. This device thus makes it possible to control highly precise movements of the horizontal beam 6 because of the absence of games, with great security because of the irreversibility of the movement between the worm and nuts, and the beam is kept horizontal thanks to the synchronization of the motors 56.
    The horizontal movements of the swing 17 in both directions are provided by means of similar guides which connect the lower table 14 to the horizontal beam 6, on the one hand, and to the upper table 15, on the other hand, and which include slides on which the tables 14 and 15 slide with prestressed intermediate balls, again to ensure play without mounting and high position accuracy at any time. The movements can be provided either by rack and pinion mechanisms or by ball screws. The vertical axis 16 can be mounted on the upper table 15 by a precharged cross roller bearing. The electromechanical cylinders 45 are attached to yokes 69 by journals 70, and are deployed by gearsless drive belt systems and ball screw. They are attached to the swing 17 in slides 70, by guide rails 71 with prestressed ball carriage, which ensure the absence of significant deformation under load.
    The vertical tube 48 of the hoist 10 moves on the mobile carriage 46 by a mechanism similar to that of the up-down systems 9 of the horizontal beam 6, described in Figure 13. The hoisting motor, which is mounted on the carriage mobile 46, however, causes a rotating nut, and the vertical tube 48 carries a fixed screw and the guides of the guide system, which slide in the movable carriage 46.
    The translation of hoists 10 and 11 is still by means of guiding systems without play, and the movement is provided by pinion and rack systems.
    The combination of zero-clearance guiding mechanisms and motor-drive systems, which can be controlled with great precision, thanks to gear-less drives and gearboxes with high gear ratios, allows motor M at well defined positions and thus to guarantee their docking. In addition, the triaxial sensor 50 measures the weight of the loads that are successively lifted by the hoist 10 and assembled together to form gradually the engine M.
    Figure 14 schematically and synthetically shows the control of the gantry. The sensors 60, comprising the triaxial sensor 50 and position sensors of the different mechanical assemblies, provide its indications to a control system 61; some of these indications, such as the measurements of the triaxial sensor 50, also appear on displays 62, which can be arranged in different places of the gantry, so as to remain in view of the operators.
    Knowing the raised weights and the positions of the various elements, the control system 61 calculates deformations 64 of the various elements of the gantry. He can exploit measurements of calibrations made before, for example by means of a laser, and memorized in a library 63. He deduces therefrom corrections of course which must be imposed on the elements, and in particular the hoisting of hoists 10 and 11, to control the docking of the modules with great precision. The trajectories corrected according to the deformations being calculated, the control system 61 acts on the motors 65 to control the docking trajectories, and imposes speed functions along the trajectories by means of speed variators 66 associated with the engines. The operators (symbolized by the mark 67) however keep the initiative of the movements, and can impose manual corrections to the trajectories, by acting on the motors 65 and variable speed drives 66, according to the reading of the displays 62.
    An assembly sequence may include the following steps. A first module of the motor M, placed on a movable carriage, is brought below the swing 17. It is then lowered and turned until the main cradle 18 to the correct height and orientation. The horizontal movements of the swing 17 place the fasteners 22 in front of the corresponding means provided on the module, and the fixing is then performed. The module is raised and returned to a proper orientation to receive other modules, which are this time raised by the main hoist 10 and advanced to the swing 17, moving the main hoist 10 on the upper track. The auxiliary cradle 19 can be put into service when a large number of modules has been mounted on the main cradle 18 and additional support becomes preferable. This can be done either by attaching another module to the auxiliary cradle and moving the auxiliary cradle to join this module to the motor M, or by attaching the motor M to the auxiliary cradle, already supported by the main cradle 18. When the main modules have been mounted by means of the main hoist 10 and possibly the auxiliary hoist 11, the auxiliary equipment of the motor M (pumps, electric motors, pipes, etc.) can be placed manually. It is then free to move the motor M on the gantry to put it to the position, the height and the most convenient orientation for each operation; the possibility of rotating it around its axis makes it possible to place all its generators at a height suitable for assemblies.
    权利要求:
    Claims (14)
    [1" id="c-fr-0001]
    1) Gantry assembly of an engine (M), the gantry comprising: a horizontal beam (6); two poles (1); two guide and up-down means (9) each connecting one end of the beam (6) to one of the posts (1); a carriage (12) placed on the beam and movable along the beam; a swing (17) suspended from the carriage; means for rotating the swing seat around a vertical axis (16) connecting the swing to the carriage, the swing comprising a cradle (18) for fixing the motor; and at least one lifting hoist (10) placed on the beam and movable along the beam.
    [0002]
    2) Gantry assembly according to claim 1, characterized in that the carriage comprises a first portion (14) connected to the beam (6) and a second portion (15) connected to the vertical axis (16), and means for moving the second portion relative to the first in a horizontal direction perpendicular to the beam.
    [0003]
    3) Gantry assembly according to any one of claims 1 or 2, characterized in that the cradle (18) comprises a first portion (20) connected to the vertical axis (16), a second portion (21) carrier fixing device (22) of the motor (M), and means for moving the second part along the first part, the second part being supported by the first part, the first part and the second part being in the form of 'arches.
    [0004]
    4) Gantry assembly according to claim 3, characterized in that the swing comprises an auxiliary cradle (19) which comprises a first portion (38) suspended from the swing, a second portion (41) carrying fixing means (40). ) of the motor (M), the second part being supported by the first part, the first part and the second part being in the form of arches, the second part sliding freely along the first part, the arches of the cradle and the cradle auxiliary being coaxial.
    [0005]
    5) Gantry assembly according to any one of claims 1 to 4, characterized in that the motor (M) is fixed to the swing (17) by fixing devices (22) comprising a free vertical clearance.
    [0006]
    6) Gantry assembly according to any one of claims 1 to 5, characterized in that the hoist (10) carries a sensor (50) load raised.
    [0007]
    7) Gantry assembly according to claim 6, characterized in that the sensor (50) of the hoist is a triaxial load sensor raised.
    [0008]
    8) Gantry assembly according to any one of claims 1 to 7, characterized in that it comprises a second hoist (11) lifting on the beam and movable along the beam (6).
    [0009]
    9) Gantry assembly according to any one of claims 1 to 8, characterized in that the hoist (10) and optionally the second hoist (11) are movable on a track (47) of the beam which is superimposed on a another track (13) of the beam on which the carriage (12) is movable, and the hoist, and optionally the second hoist, can be lifted by extending completely to a level above a top of the movable carriage and the swing .
    [0010]
    10) Gantry assembly according to any one of claims 1 to 9, characterized in that it comprises junction beams (7) connecting the posts together, the junction beams comprising oblique beams (8) having crossed directions.
    [0011]
    11) Gantry assembly according to any one of claims 1 to 10, characterized in that the posts comprising a rising portion (2), inclined away from the horizontal beam, and a curved crown portion (5) vault, connecting the rising part to the horizontal beam.
    [0012]
    12) Gantry assembly according to any one of claims 6 or 7, characterized in that it comprises a control device (61) for moving the components of the gantry, the device comprising digital means for automatically correcting the displacements of after the weights lifted by the hoist (10) and supported by the cradle (18).
    [0013]
    13) Gantry assembly according to any one of claims 6, 7 or 12, characterized in that it comprises a display (62) of the load raised and measured by the sensor (50).
    [0014]
    14) Gantry assembly according to any one of claims 1 to 13, characterized in that the displacement means comprise, between two parts that they connect, intermediate rolling guide means mounted without clearance and prestressed.
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    法律状态:
    2016-10-11| PLFP| Fee payment|Year of fee payment: 2 |
    2017-05-05| PLSC| Publication of the preliminary search report|Effective date: 20170505 |
    2017-09-21| 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 |
    2018-09-19| PLFP| Fee payment|Year of fee payment: 4 |
    2019-09-19| PLFP| Fee payment|Year of fee payment: 5 |
    2020-09-17| PLFP| Fee payment|Year of fee payment: 6 |
    2021-09-22| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1560377A|FR3043000B1|2015-10-29|2015-10-29|ENGINE ASSEMBLY PORTIC|
    FR1560377|2015-10-29|FR1560377A| FR3043000B1|2015-10-29|2015-10-29|ENGINE ASSEMBLY PORTIC|
    EP16809122.1A| EP3368749B1|2015-10-29|2016-10-27|Gate for assembling an engine|
    BR112018008187-6A| BR112018008187A2|2015-10-29|2016-10-27|engine mounting gantry|
    RU2018119199A| RU2718704C2|2015-10-29|2016-10-27|Assembly bench for engine assembly|
    US15/770,368| US11052533B2|2015-10-29|2016-10-27|Engine assembly stand|
    CA3002908A| CA3002908A1|2015-10-29|2016-10-27|Engine assembly stand|
    CN201680062383.2A| CN108350756B|2015-10-29|2016-10-27|Engine assembling support|
    PCT/FR2016/052791| WO2017072449A1|2015-10-29|2016-10-27|Engine assembly stand|
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