Tool for installing a degassing tube in a hollow shaft of an aircraft turbine engine and method of using the tool

Abstract

The invention relates to a tool (4) for installing a degassing pipe in a hollow shaft of a turbomachine of an aircraft, the tool comprising a tubular body (5) having an elongated shape along an axis (A) and comprising: - an internal longitudinal channel (50) extending over the entire longitudinal dimension of the body (5) and configured to house the degassing pipe; and - a longitudinal slot (51) extending over the entire longitudinal dimension of the body (5) and opening into the channel (50), wherein the slot (51) is configured to insert the degassing pipe into the channel (50) by translating the degassing pipe through the slot (51) in a transverse direction, and wherein the body (5) is made by assembling a first axial section (6) made of a first material and a second axial section (7) made of a second material different from said first material.

Description

Technical Field

[0001] This invention relates to the field of aircraft turbine engines. More specifically, this invention relates to a tool for mounting a degassing pipe in a hollow shaft of a turbine engine, and a method for mounting the degassing pipe in a hollow shaft using such a tool. Background Technology

[0002] Prior art includes, in particular, documents US-A1-3722058, FR-A1-3107717 and US-A1-2013 / 008550.

[0003] Conventionally, an aircraft turbine engine comprises, from upstream to downstream (i.e., in the direction of airflow), a fan, one or more compressor stages (e.g., a low-pressure compressor and a high-pressure compressor), a combustion chamber, one or more turbine stages (e.g., a high-pressure turbine and a low-pressure turbine), and a gas exhaust nozzle.

[0004] The turbine engine includes a degassing manifold that extends longitudinally through the turbine engine to the exhaust nozzle. The purpose of the degassing manifold is to guide oil-free air from the turbine engine to the exhaust nozzle.

[0005] More specifically, the degassing pipe is coaxially mounted within the hollow drive shaft of a turbine engine (particularly the turbine). The upstream end of the degassing pipe can be connected to a lubrication housing, which houses guide and centering bearings. Lubricating oil in the bearings mixes with air, enters the degassing pipe, and flows through it to separate from the air, where it is then recycled downstream.

[0006] For example, the degassing pipe is attached to a hollow shaft at its downstream end and aligned with the longitudinal axis of the shaft. To facilitate the installation of the degassing pipe into the hollow shaft, a tool may be required that is easy to use and, more generally, poses no risk of damaging the tool, the degassing pipe, the hollow shaft, and / or the turbine engine. For example, this type of tool could be made using a limited number of accessories (e.g., bolts and screws) to avoid any risk of the tool screws coming loose when the degassing pipe is installed in the hollow shaft.

[0007] Therefore, it is necessary to determine a simple and reliable tooling solution for mounting the degassing pipe in the hollow shaft of an aircraft turbine engine. Summary of the Invention

[0008] This invention provides a simple, effective and economical solution to at least some of the above-mentioned problems.

[0009] This invention provides a tool for installing a degassing pipe in a hollow shaft of an aircraft turbine engine. The tool includes a tubular body having an elongated shape along its axis, the tubular body comprising: - An internal longitudinal channel, extending along the entire longitudinal dimension of the tubular body and configured to accommodate a degassing tube, and - A longitudinal slot extending along the entire longitudinal dimension of the tubular body and leading to an internal longitudinal channel, the longitudinal slot being configured to insert a degassing tube into the channel by translating the degassing tube laterally through the longitudinal slot. The tubular body is manufactured by assembling a first axial segment made of a first material and a second axial segment made of a second material different from the first material.

[0010] Therefore, this solution enables the achievement of the aforementioned objectives. Generally, the tool used in this invention makes it easier and more reliable to install the degassing tube into the hollow shaft. To achieve this, the tool enables the manufacture of the tubular body by integrating, on the one hand, the internal longitudinal channel and longitudinal slot, and on the other hand, integrating a first section and a second section made of different materials and assembled together.

[0011] The internal longitudinal channels and longitudinal slots simplify the process of inserting the degassing tube into the tubular body, thereby facilitating the guidance and centering of the degassing tube within the hollow shaft (especially relative to the longitudinal axis of the hollow shaft).

[0012] Advantageously, the tubular body can be assembled by screwing or snapping together a first axial section and a second axial section. When using tools, assembly by screwing or snapping allows the first and second sections to be axially locked together. Assembly by threaded connection facilitates manufacturing while ensuring an effective and secure connection between the first and second axial sections. Assembly by snapping has the advantage of limiting the use of bolt and screw type attachments, as mentioned above, which can be unscrewed and fall into the turbine engine. Furthermore, assembly by screwing or snapping can be reversible, allowing for repair or replacement of one section in case of wear. Additionally, the first and second sections are made of different materials, allowing one of these sections to deform and making it easier to screw or snap together. For example, an axial section made of a softer material is suitable for supporting a hollow shaft without damaging it.

[0013] "Tightening" refers to assembling at least one part of a section into another, for example by tightening the externally threaded part and the internally threaded part (in other words, the complementary part with internal threads) in a complementary manner.

[0014] "Interlocking" refers to assembling at least one part of a segment into another, for example, through interlocking.

[0015] The tool according to the invention may include one or more of the following features, which may be considered independently or in combination with each other: - The cross-section of the tubular body is U-shaped or C-shaped; - The first axial section includes a first portion of an internal longitudinal channel and a first portion of a longitudinal slot; the second axial section includes a second portion of an internal longitudinal channel and a second portion of a longitudinal slot. The first longitudinal end of the second axial segment is assembled (e.g., by screwing or snapping) into the second longitudinal end of the first axial segment. This is achieved by rotating or translating the second axial segment in the first part of the internal longitudinal channel, through the first part of the longitudinal slot. Conversely, the second longitudinal end of the first axial segment is assembled (e.g., by screwing or snapping) into the first longitudinal end of the second axial segment by rotating or translating the first axial segment in the second part of the internal longitudinal channel, through the second part of the longitudinal slot.

[0016] - The first portion of the longitudinal slot of the first axial section has an opening angle smaller than the opening angle of the second portion of the longitudinal slot of the second axial section, the opening angle being measured in a plane perpendicular to axis A, wherein the center of the opening angle is located on axis A; - One of the first axial segment and the second axial segment includes a circumferential edge that engages in a circumferential groove in the other axial segment and is axially held in the circumferential groove by the circumferential edge being axially abutting against the sidewall of the circumferential groove. - The axial segment including a circumferential edge or circumferential groove includes a pair of snap-fit ​​teeth configured to engage with the longitudinal edge of another axial segment, respectively. - The pair of snap-fit ​​teeth are located at a portion of the longitudinal slot of the first axial section, and the longitudinal edge is the longitudinal edge of a portion of the longitudinal slot of the second axial section; - The first axial segment has a third free longitudinal end, which is tapered and includes a generally truncated conical shape; - The second axial section has a fourth free longitudinal end, which includes a fastening tab and / or an orifice, preferably for a roller or guide pad; - The tool also includes a frame for supporting and guiding the tubular body, the frame having a generally elongated shape and including longitudinal ends suitable for attachment to a shaft or turbine engine component, the frame comprising: - Two sidewalls, which extend along axis A and are capable of accommodating the tubular body 5 between the two sidewalls, and - Two sliding guides, each supported by a sidewall and capable of accommodating a roller or guide pad supported by a tubular body, so that the tubular body can translate relative to the frame along its axis A; The longitudinal end of frame 8 includes a fastening hoop through which the tubular body can pass; - The frame also includes crossbars for connecting the sidewalls, the crossbars extending between the sidewalls, two of these crossbars being spaced apart from each other by a distance greater than the maximum length of the tubular body, so that the tubular body can be moved between these crossbars by translating in a lateral direction relative to the axis A of the tubular body. - The frame includes a bottom wall, the side ends of which are respectively attached to the side walls, and the bottom wall is located between two crossbars and is able to accommodate the tubular body after the tubular body is translated; -The bottom wall is roughly U-shaped or C-shaped; - The guide rail includes a channel window through which rollers or guide pads can pass to allow the tubular body to move between the crossbars and to the bottom wall; - The frame also includes two side handles located on the two side walls respectively; - The first axial section includes a circumferential notch located between its circumferential edge and its first circumferential groove; - The first longitudinal end of the second axial section includes an external thread that is complementary to the internal thread of the second longitudinal end of the first axial section.

[0017] The present invention also relates to a method for installing a degassing pipe in a hollow shaft of an aircraft turbine engine using an apparatus according to one of the features of the invention.

[0018] The method includes the following steps: - Install the tool by assembling the first axial section and the second axial section (e.g., by screwing or snapping). Install the tool by aligning it with the hollow shaft. - By laterally translating the degassing tube through the longitudinal slot, the degassing tube is inserted into the internal longitudinal channel. -The degassing tube is installed in the hollow shaft by a first translation along axis A in the first lateral direction, and - Remove the tool by a second translation in the second lateral direction opposite to the first translation.

[0019] The invention may include the step of mounting the tubular body to a frame by assembling a sliding guide rail to a roller or guide pad of the tubular body, the step of which is performed between the assembly of the first axial section and the second axial section (e.g., by screwing or snapping) and the step of inserting the degassing tube into the internal longitudinal channel. Attached Figure Description

[0020] The invention will be better understood through the following description, by way of non-limiting example and with reference to the accompanying drawings, and other details, features and advantages of the invention will become clearer, as illustrated in the drawings: Figure 1 This is a partial schematic cross-sectional view of an aircraft turbine engine, which includes a degassing manifold mounted in a hollow shaft. Figure 2 According to an embodiment of the present invention, a method for installing a degassing pipe is used. Figure 1 A schematic perspective view of the tool within the hollow shaft. Figure 3 yes Figure 2 A schematic half-top view of the first axial section of the tool. Figure 4 yes Figure 2 A partial schematic perspective view of the tool shown. Figure 5 yes Figure 2 Another partial schematic perspective view of the tool shown. Figure 6 It is viewed from above. Figure 2 or Figure 4 A partial schematic diagram of the tool shown. Figure 7 It is by... Figure 2 A partial schematic cross-sectional view of a first example of a tool being assembled by engaging the first and second axial sections. Figure 8 It is by... Figure 2 A partial schematic cross-sectional view of a second example of a tool assembled by engaging the first and second axial sections. Figure 9 This is a partial schematic perspective view of a third example of assembly via a threaded connection between the first and second axial sections of the tool of the present invention. Figure 10 According to another embodiment of the present invention, a method for installing a degassing pipe is used to install... Figure 1 A schematic perspective view of the tool within the hollow shaft. Figure 11 It is an insertion. Figure 2 A partial schematic perspective view of the degassing tube in the tool shown. Figure 12 It is an insertion. Figure 10 A partial schematic perspective view of the degassing tube in the tool shown. Figure 13 Is using Figure 10 The diagram shows a partial schematic perspective view of the degassing tube in which the tool is mounted in a hollow shaft. Figure 14 Is it removal? Figure 10 A partial schematic perspective view of the tool shown. Figure 15 yes Figure 14A partial schematic perspective view showing the situation after the tool has been removed.

[0021] Elements that have the same function in different embodiments have the same reference numerals in the drawings. Detailed Implementation

[0022] Generally, in the following description, the terms "longitudinal" and "axial" refer to the orientation of a structural element extending in a direction along a longitudinal axis (such as the longitudinal axis of an aircraft turbine engine). This axis may coincide with the axis of rotation of the turbine engine rotor. The term "radial" refers to the orientation of a structural element extending in a direction perpendicular to the longitudinal axis. The terms "inner" and "outer," as well as "internal" and "external," are used to refer to positioning relative to the longitudinal axis. In this way, a structural element extending along the axis includes an inner surface oriented toward the axis and an outer surface opposite to its inner surface. Similarly, the terms "upstream" and "downstream" are defined relative to the direction of airflow in the turbine engine.

[0023] Reference Figure 1 The aircraft turbine engine 1 includes a fan in a non-limiting manner from upstream to downstream. Figure 1 (Not shown in the image), low-pressure compressor 1a, high-pressure compressor 1b, combustion chamber 1c, high-pressure turbine 1d, low-pressure turbine 1e, and gas exhaust nozzle ( Figure 1 (Not shown in the image).

[0024] The high-pressure turbine 1e can drive the high-pressure compressor 1b via a high-pressure shaft (or alternatively referred to as a turbine shaft and, in this application, a hollow shaft 2), and these components form the high-pressure body. The low-pressure turbine 1d can drive the low-pressure compressor 1a via a low-pressure shaft coaxially disposed inside the high-pressure shaft, and these components form the low-pressure body.

[0025] The hollow shaft 2 extends along the longitudinal axis X, which can substantially correspond to the main axis of the turbine engine 1.

[0026] The turbine engine 1 may include a degassing pipe 3. The degassing pipe 3 may extend longitudinally through the turbine engine 1 to the gas exhaust nozzle.

[0027] Specifically, the degassing tube 3 can be coaxially mounted within the hollow shaft 2. The degassing tube 3 can be hollow or cylindrical. The degassing tube 3 may include multiple continuous hollow sections: an upstream section 31, a downstream section 33, and a central section 32 connecting the upstream section 31 and the downstream section 33. The upstream section 31 may include multiple holes designed to allow gas to be discharged into the degassing tube 3, while the downstream section 33 leads to a gas outlet located, for example, in an exhaust nozzle.

[0028] The downstream portion 33 may include at least one annular flange 34, 35. More specifically, particularly at the end of the downstream portion 33, the degassing pipe 3 may include a first annular flange 34 and a second annular flange 35 extending radially outward. The first annular flange 34 and the second annular flange 35 allow the degassing pipe 3 to be held in place in the hollow shaft 2 by means of the tool 4 described below. For example, a seal may be positioned around the first flange 34 to ensure that the degassing pipe is centered in the hollow shaft without damaging the hollow shaft. The second flange 35 is also used to center the degassing pipe and may also be used to axially secure the degassing pipe in the turbine engine.

[0029] As described above, the function of the degassing pipe 3 is to guide oil-free air from the turbine engine 1 to the exhaust nozzle. The degassing pipe 3 can be assembled into the hollow shaft 2 using a special tool 4.

[0030] This application will now specifically refer to Figures 3 to 10 Describe the various possible configurations of tool 4.

[0031] Tool 4 includes a tubular body 5, which has an elongated shape along axis A. When tool 4 is installed in a turbine engine (particularly at the hollow shaft 2) to install the degassing pipe 3, axis A can be substantially continuous with the longitudinal axis X of the hollow shaft 2.

[0032] The cross-section of the tubular body 5 can be U-shaped or C-shaped.

[0033] The tubular body 5 includes: - An internal longitudinal channel 50 extends along the entire longitudinal dimension of the tubular body 5 and is configured to accommodate the degassing tube 3, and - A longitudinal slot 51 extends along the entire longitudinal dimension of the tubular body 5 and leads to an internal longitudinal channel 50. The longitudinal slot 51 is configured to allow the degassing tube 3 to be inserted into the internal longitudinal channel 50 by translating the degassing tube 3 through the longitudinal slot 51 in the lateral direction.

[0034] The tubular body 5 is manufactured by assembling a first axial segment 6 made of a first material and a second axial segment 7 made of a second material different from the first material. In other words, the tubular body 5 may include the first segment 6 and the second segment 7, with the first segment 6 and the second segment 7 at least partially fitted inside the other.

[0035] Advantageously, the tubular body 5 can be screwed ( Figure 9 ) or card connection ( Figures 2 to 8 ,as well as Figure 10 The first axial segment 6 and the second axial segment 7 are assembled in a manner that allows them to be assembled together.

[0036] exist Figures 2 to 10In the example shown, the first axial segment 6 may include a first portion 60 of the internal longitudinal channel 50 (referred to as the first channel portion 60) and a first portion 61 of the longitudinal slot 51 (referred to as the first slot portion 61). The second axial segment 7 may include a second portion 70 of the internal longitudinal channel 50 (referred to as the second channel portion 70) and a first portion 71 of the longitudinal slot 51 (referred to as the second slot portion 71). The first channel portion 60 and the second channel portion 70 may form the internal longitudinal channel 50 of the tubular body. Typically, the first slot portion 61 and the second slot portion 71 may form the internal longitudinal slot 51 of the tubular body. When the first axial segment 6 and the second axial segment 7 are assembled together, the first channel portion 60 and the first slot portion 61 may be aligned with the second channel portion 70 and the second slot portion 71 along axis A, respectively.

[0037] Advantageously, the first slot portion 61 may have a first opening angle α. 61 Furthermore, the second groove portion 71 may have a second opening angle α. 71 These opening angles α 61 α 71 It can be measured in a plane perpendicular to axis A, in which the center of the opening angle lies on axis A. For example, the first opening angle α 61 It can be between 70° and 180°. The second opening angle α71 can be between 100° and 190°, preferably about 180°.

[0038] In the example shown, the first opening angle α 61 It can be smaller than the second opening angle α 71 ( Figure 5 ).

[0039] The first material used to manufacture the first axial section 6 can be a plastic material, such as polyethylene (HDPE) or resin. Preferably, the first material can be softer than the second material. In particular, this prevents damage to the surfaces of the turbine engine 1 that are abutted by the first axial section 6 (e.g., the surface of the hollow shaft 2) when using the tool 4. Furthermore, assembly becomes easier by screwing or snapping.

[0040] The first axial segment 6 may include a second longitudinal end 62. The second longitudinal end 62 may be assembled to the first longitudinal end 72 of the second axial segment 7.

[0041] The first axial segment 6 may include a third longitudinal end 64. The third longitudinal end 64 may be free. The third longitudinal end 64 may be tapered and may have a generally truncated conical shape.

[0042] Reference Figure 3The first axial segment 6 may extend between the second longitudinal end 62 and the third longitudinal end 64. The first channel portion 60 may be located at the third longitudinal end 64, while the second longitudinal end 62 may accommodate at least a portion of the first longitudinal end 72 of the second axial segment 7. This also prevents damage to the surface of the turbine engine 1 that is abutted by the first axial segment 6 when using the tool 4.

[0043] Advantageously, the first axial segment 6 may include a first circumferential edge 66 and a first circumferential groove 68. The first circumferential groove 68 may be located between the first circumferential edge 66 and the third longitudinal end 64.

[0044] The first circumferential edge 66 of the first axial segment 6 can engage in the second circumferential groove 78 of the second axial segment 7. Therefore, the first circumferential edge 66 can be axially held in the second circumferential groove 78 by the axial abutment of the first circumferential edge 66 with the sidewall of the second circumferential groove 78.

[0045] The first circumferential edge 66 or the first circumferential groove 68 may include a first pair of engaging teeth 660. The first pair of teeth 660 may be configured to engage with the first longitudinal edge 780 of the second axial segment 7. In this configuration, the first pair of engaging teeth 660 may be located at the first slot portion 61, and the first longitudinal edge 780 may be the first longitudinal edge of the second slot portion 71 of the second axial segment 7.

[0046] exist Figures 2 to 6 In the example shown, the first pair of teeth 660 can be located at the first circumferential edge 66.

[0047] The first circumferential edge 66 may have a first length L measured along axis A. 66 The first circumferential groove 68 may have a second length L, also measured along axis A. 68 First length L 66 It can be smaller than the second length L 68 ( Figure 6 ).

[0048] The first axial segment 66 may include a circumferential notch 69. The circumferential notch 69 may be located between the first circumferential edge 66 and the first circumferential groove 68. The circumferential notch 69 provides flexibility or partial deformation of the first axial segment 66, which facilitates assembly, particularly by snap-fit ​​assembly.

[0049] The second material used for the second axial section 7 can be made of a metallic material (e.g., aluminum). This provides sufficient rigidity for the tubular body 5 to support the degassing tube 3.

[0050] The second axial segment 7 may include a first longitudinal end 72. The first longitudinal end 72 may be assembled to the second longitudinal end 62 of the first axial segment 6.

[0051] The second axial segment 7 may include a fourth longitudinal end 74. This fourth longitudinal end 74 may be free. The fourth longitudinal end 74 may include, for example, fasteners 79 that are fastened to the frame 8, as described below. These fasteners 79 may be fastening tabs 79b ( Figure 10 ) and / or fastening port 79a ( Figure 2 The fastening tab 79b can be a roller or a guide pad.

[0052] In the example described, the second axial segment 7 may extend between the first longitudinal end 72 and the fourth longitudinal end 74. The second channel portion 70 and the second slot portion 71 may extend between the first longitudinal end 72 and the fourth longitudinal end 74.

[0053] Advantageously, the second axial segment 7 may include a second circumferential edge 76 and a second circumferential groove 78. The second circumferential groove 78 may be located between the second circumferential edge 76 and the fourth longitudinal end 74.

[0054] The second circumferential edge 76 of the second axial segment 7 can engage in the first circumferential groove 68 of the first axial segment 6. Therefore, the second circumferential edge 76 can be axially held in the first circumferential groove 68 by the axial abutment of the second circumferential edge 76 with the sidewall of the first circumferential groove 68.

[0055] The second circumferential edge 76 or the second circumferential groove 78 may include a second pair of engaging teeth (not visible in the figure). This second pair of teeth may be configured to engage with the second longitudinal edge of the first axial segment 6. In this configuration, the second pair of engaging teeth may be located at the second slot portion 71, and the second longitudinal edge may be the second longitudinal edge of the first slot portion 61 of the first axial segment 6.

[0056] The second circumferential edge 76 may have a third length L measured along axis A. 76 The second circumferential groove 68 may also have a fourth length L, measured along axis A. 68 . Reference Figure 6 First length L 66 It can be less than or equal to the fourth length L 78 First length L 66 With the fourth length L 78 The length difference between them allows an axial gap to be formed between the first circumferential edge 66 and the second circumferential groove 78, facilitating assembly by snap-fit. The third length L 76 Can be used with the second length L 68 They are basically the same.

[0057] Reference Figure 7The second longitudinal end 62 can be assembled by snapping it into the first longitudinal end 72 of the second axial section 7, which is achieved by the first axial section 6 translating in the second channel section 70 through the second slot section 71 in the lateral direction T.

[0058] Reference Figure 8 The first longitudinal end 72 can be assembled by snapping it into the second longitudinal end 62 of the first axial section 6, which is achieved by the second axial section 7 translating through the first slot section 61 in the first channel section 60 in the lateral direction T.

[0059] By snapping the first axial segment 6 and the second axial segment 7 together, the lateral direction T of the assembly can be the radial direction (or the vertical plane) relative to axis A.

[0060] Reference Figure 9 The first longitudinal end 72 of the second axial segment 7 may include an external thread that is complementary to the internal thread of the second longitudinal end 62 of the first axial segment 6.

[0061] Figure 9 Tools 4 and Figures 2 to 8 The difference in tool 4 is that the first axial section 6 and the second axial section 7 are assembled together by screwing.

[0062] Specifically, the second longitudinal end 62 can be assembled by screwing it into the first longitudinal end 72, which is achieved by rotating the first axial segment 6 through the second slot portion 71 in the second channel portion 70. Alternatively, the first longitudinal end 72 can be assembled by screwing it into the second longitudinal end 62, which is achieved by rotating the second axial segment 7 through the first slot portion 61 in the first channel portion 60.

[0063] Tool 4 may also include a support and guide frame 8 for the tubular body 5, hereinafter referred to as frame 8.

[0064] Reference Figure 10 The frame 8 may have a generally elongated shape and may include a fifth longitudinal end 80, which is adapted to be attached to the shaft or component of the turbine engine 1.

[0065] The fifth longitudinal end 80 of the frame 8 may include a fastening clamp 800 through which the tubular body 5 may pass. The "clamp" refers to an annular frame that can be fastened to the shaft or component of the turbine engine 1 and has an opening through which the tubular body 5 (possibly the degassing pipe 3) may pass and slide in the direction of the hollow shaft 2.

[0066] Frame 8 may include: - Two sidewalls 81, 82 (such as a first sidewall 81 and a second sidewall 82), which extend along axis A and are capable of accommodating the tubular body 5 between the two sidewalls, and - Two sliding guides 810, 820 (such as a first sliding guide 810 and a second sliding guide 820), which are supported by sidewalls 81, 82 respectively and are capable of accommodating fastening tabs 79b (such as rollers or guide pads) supported by the tubular body 5 (especially by the second axial segment 7) so that the tubular body 5 can be translated relative to the frame 8 along its axis A.

[0067] The frame 8 may also include crossbars 83 connecting the side walls 81 and 82. These crossbars 83 may extend between the side walls 81 and 82. Figure 10 In the example shown, frame 8 may include a first crossbar 83a, a second crossbar 83b, and a third crossbar 83c. Two of these crossbars 83 (such as the first crossbar 83a and the third crossbar 83c) may be spaced apart from each other by a distance greater than the maximum length of the tubular body 5, such that the tubular body 5 can be moved between these crossbars 83a, 83c by translating in the lateral direction relative to the axis A of the tubular body 5.

[0068] The frame 8 may also include two side handles 812, 822 (such as a first side handle 812 and a second side handle 822) located on the two side walls 81, 82 respectively. These side handles 812, 822 make it easier to grip and handle the frame 8. The frame 8 may include a bottom wall 84. The bottom wall 84 may be generally U-shaped or C-shaped, with its side ends attached to the side walls 81 and 82 respectively. The bottom wall 84 may be located between two crossbars (such as a second crossbar 83b and a third crossbar 83c). The bottom wall 84 can be used to collect the tubular body 5 after translation of the tubular body, for example, for removal at the end of installation.

[0069] The guide rails 810, 820 may include windows 814, 824 for passing through fastening tabs 79b (such as rollers or guide pads) so that the tubular body 5 can move between crossbars 83 (such as second crossbars 83b and third crossbars 83c) and to the bottom wall 84.

[0070] This application will now refer to, for example, [the following text is missing from the original] Figures 11 to 15 A method for installing the degassing tube 3 in the hollow shaft 2 is described.

[0071] In summary, the method may include the following steps: - Install tool 4 by assembling the first axial section 6 and the second axial section 7. - Install tool 4 by aligning it with hollow shaft 2 (specifically along axis X). - By laterally translating the degassing tube 3 through the longitudinal slot 51, the degassing tube 3 is inserted into the internal longitudinal channel 50. - By causing the degassing tube 3 to be translated first along axis A in the first transverse direction T1, the degassing tube 3 is installed in the hollow shaft 2, and -The tool 4 is removed by a second translation in a second lateral direction T2 opposite to the first translation direction T1 (in particular, the tool 4 is removed from the degassing tube 3 installed in the hollow shaft 2).

[0072] As mentioned above, for example, refer to Figures 7 to 9 The steps for installing tool 4 may include: - By rotating or translating through the second slot portion 71 in the second channel portion 70 along the lateral direction of the first axial segment 6, the second longitudinal end 62 of the first axial segment 6 is assembled (e.g., by screwing or snapping) into the first longitudinal end 72 of the second axial segment 7, or - The first longitudinal end 72 is assembled (e.g., by screwing or snapping) into the second longitudinal end 62 of the first axial section 6 by rotating or translating through the first slot section 61 in the first channel section 60 in the lateral direction of the second axial section 7.

[0073] The steps of inserting the degassing tube 3 into the internal longitudinal channel 50 and installing the degassing tube 3 into the hollow shaft 2 can be reversed.

[0074] Figure 11 An example is shown where the degassing tube 3 is inserted into the internal longitudinal channel 50 of the tubular body 5.

[0075] Reference Figure 12 The method may also include the step of mounting the tubular body 5 to the frame 8 by assembling the sliding guides 810, 820 to the fastening tabs 79b (such as rollers or guide pads) of the tubular body 5. This step of mounting the tubular body 5 to the frame 8 is performed between the assembly (e.g., by screwing or snapping) of the first axial section 6 and the second axial section 7 and the step of inserting the degassing tube 3 into the internal longitudinal channel 50.

[0076] Figure 13 A non-limiting example is shown of installing the degassing tube 3 in the hollow shaft 2 by a first translation along the first direction T1.

[0077] The step of installing the degassing tube 3 into the hollow shaft 2 can be performed until at least one of the annular flanges 34 and 35 of the degassing tube 3 is axially supported on the tubular body 5. For example, the first annular flange 34 can be translated until it is axially supported on the first axial section 6, for example, on the circumferential shoulder 67 of the first axial section 6. The circumferential shoulder 67 can be located between the second longitudinal end 62 and the third longitudinal end 64.

[0078] Figure 14 and Figure 15 An example of the removal tool 4 is shown in a non-limiting manner, wherein the tubular body 5 (particularly in the absence of the degassing tube 3 alone) is first moved by a second translation along a second lateral direction T2. ​​More specifically, the tubular body 5 can be moved by translation until it is axially supported on the second annular flange 35 of the degassing tube 3. Then, when the tool 4 also includes the frame 8, the tubular body 5 can be moved toward the bottom wall 84 of the frame 8. The tubular body 5 can also be moved toward the bottom wall 84 by translation along a third third direction T3. This third third direction T3 can be realized in a radial direction (or a vertical plane) relative to axis A (or the first direction T1 and the second direction T2). Finally, the tubular body 5 and / or the frame 8 can be extracted from the turbine engine 1.

[0079] The first transverse direction T1 and the second transverse direction T2 can be axial directions (or parallel planes) relative to the axis A and axis X of the hollow shaft 2.

Claims

1. A tool (4) for mounting a degassing tube (3) in a hollow shaft (2) of an aircraft turbine engine (1), the tool (4) comprising a tubular body (5) having an elongated shape along an axis (A), the tubular body (5) including an internal longitudinal channel (50) extending over the entire longitudinal dimension of the tubular body (5) and configured to receive the degassing tube (3). Its features are, The tubular body (5) includes a longitudinal slot (51) that extends along the entire longitudinal dimension of the tubular body (5) and leads to the internal longitudinal channel (50). The longitudinal slot (51) is configured to insert the degassing tube (3) into the internal longitudinal channel (50) by translating the degassing tube (3) through the longitudinal slot (51) in the lateral direction. The tubular body (5) is made by assembling a first axial segment (6) made of a first material and a second axial segment (7) made of a second material different from the first material.

2. The tool according to claim 1, wherein, The tubular body (5) is assembled by screwing or snapping the first axial section (6) and the second axial section (7) together.

3. The tool according to claim 1 or 2, wherein, The first axial segment (6) includes a first portion (60) of the internal longitudinal channel (50) and a first portion (61) of the longitudinal slot (51), and the second axial segment (7) includes a second portion (70) of the internal longitudinal channel (50) and a second portion (71) of the longitudinal slot (51). The first longitudinal end (72) of the second axial segment (7) is assembled in the second longitudinal end (62) of the first axial segment (6), which is achieved by the second axial segment (7) rotating or translating in the lateral direction within the first part (60) of the internal longitudinal channel, through the first part (61) of the longitudinal slot. Conversely, the second longitudinal end (62) of the first axial segment (6) is assembled in the first longitudinal end (72) of the second axial segment (7), which is achieved by the first axial segment (6) rotating in the second part (70) of the inner longitudinal channel, passing through the second part (71) of the longitudinal slot, or translating in the lateral direction.

4. The tool according to claim 3, wherein, The first portion (61) of the longitudinal slot of the first axial segment (6) has an opening angle (α). 61 The opening angle is smaller than the opening angle of the second part (71) of the longitudinal slot of the second axial segment (7), the opening angle (α) 61 α 71 The angle is measured in a plane perpendicular to the axis (A), wherein the center of the opening angle is located on the axis (A).

5. The tool according to any one of claims 1 to 4, wherein, One of the first axial segment (6) and the second axial segment (7) includes a circumferential edge (66, 76) that engages in a circumferential groove (68, 78) of the other axial segment (6, 7) and is axially held in the circumferential groove (68, 78) by means of the axial abutment of the circumferential edge (66, 76) with the sidewall of the circumferential groove (68, 78).

6. The tool according to claim 5, wherein, The axial segment (6) including the circumferential edge (66, 76) or the circumferential groove (68, 78) includes a pair of snap teeth (660) configured to engage with the longitudinal edge (780) of another axial segment (7), respectively.

7. The tool according to claim 6, which is dependent on claims 2, 3, and 5 or claims 2, 3, 4, and 5, wherein, The pair of snap-fit ​​teeth (660) are located at a portion (61) of the longitudinal slot of the first axial section (6), and the longitudinal edge (780) is the longitudinal edge of a portion (71) of the longitudinal slot of the second axial section (7).

8. The tool according to any one of the preceding claims, wherein, The first axial segment (6) has a third free longitudinal end (64), which is tapered and has a generally truncated conical shape.

9. The tool according to any one of the preceding claims, wherein, The second axial segment (7) has a fourth free longitudinal end (74), which includes a fastening tab (79b) and / or an orifice (79a) preferably for a roller or guide pad.

10. The tool according to any one of the preceding claims, wherein, The tool also includes a frame (8) for supporting and guiding the tubular body (5), the frame (8) having a generally elongated shape and including longitudinal ends suitable for attachment to a shaft or turbine engine element (1), the frame (8) comprising: - Two sidewalls (81, 82), the two sidewalls extending along the axis (A) and capable of accommodating the tubular body (5) between the two sidewalls, and - Two sliding guide rails (810, 820), each supported by the sidewalls (81, 82) and capable of accommodating rollers or guide pads supported by the tubular body (5) so that the tubular body (5) can translate relative to the frame (8) along its axis (A).

11. The tool according to claim 10, wherein, The frame (8) also includes crossbars (83, 83a, 83b, 83c) for connecting the sidewalls (81, 82), the crossbars extending between the sidewalls (81, 82), two of the crossbars (83a, 83c) being spaced apart from each other by a distance greater than the maximum length of the tubular body (5) so that the tubular body (5) can be moved between the crossbars (83a, 83c) by translating in a lateral direction relative to the axis (A) of the tubular body (5).

12. The tool according to claim 11, wherein, The frame (8) includes a bottom wall (84), the side ends of which are respectively attached to the side walls (81, 82), and the bottom wall (84) is located between the two crossbars (83b, 83c) and is capable of accommodating the tubular body (5) after the tubular body is translated.

13. The tool according to claim 12, characterized in that, The guide rails (810, 820) include channel windows (814, 824) through which the rollers or guide pads can pass to allow the tubular body (5) to move between the crossbars (83) and to the bottom wall (84).

14. A method for installing a degassing pipe (3) in a hollow shaft (2) of an aircraft turbine engine using a tool (4) according to any one of the preceding claims, characterized in that, The method includes the following steps: - The tool (4) is installed by assembling the first axial section (6) and the second axial section (7). - The tool (4) is installed by aligning the tool with the hollow shaft (2). - By laterally translating the degassing tube (3) through the longitudinal slot (51), the degassing tube (3) is inserted into the internal longitudinal channel (50). - By causing a first translation of the degassing tube (3) along the axis (A) in the first lateral direction (T1), the degassing tube (3) is installed in the hollow shaft (2), and -The tool (4) is removed by a second translation in a second lateral direction (T2) opposite to the first translation (T1).

15. The installation method according to the preceding claim in conjunction with claim 10, wherein, The installation method includes the step of installing the tubular body (5) onto the frame (8) by assembling the sliding rails (810, 820) onto the rollers or guide pads of the tubular body (5), the step being performed between the assembly of the first axial section (6) and the second axial section (7) and the step of inserting the degassing tube (3) into the internal longitudinal channel (50).

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