FR2980649A1 - Guidance device for cable that is utilized for fitting connector with turboshaft engine, has guide arm presenting ends, where one end is adapted to retain cable equipped with connector in cooperation with reserve unit - Google Patents

Abstract

The device (100) has an assembly unit that is adapted to mount the device on an outer peripheral surface (11a) of a connector (11). The outer peripheral surface is deprived of a thread. A guide arm (110) has a set of ends (111, 112), where one of the ends is interdependent of the assembly unit and another end is arranged opposed to the former end, where the latter end is adapted to retain a cable (10) equipped with the connector in cooperation with a reserve unit. An independent claim is also included for a turboshaft engine connection system.

Description

TECHNICAL FIELD The invention relates to the field of turbomachines and connection cables present in these same turbomachines. The manufacture of a turbomachine requires a number of connection cables in order to connect the various equipment, such as thermal probes, equipping said turbomachine. Because of the compactness of turbomachines and the presence of moving parts, these connection cables must have well-defined and fixed paths. In order to obtain this type of trajectory, it is known to provide, during the manufacture of a turbomachine, on at least a portion of the cables, cable guiding devices. The invention relates more particularly to a cable guiding device, a turbomachine connection system and a turbomachine. STATE OF THE PRIOR ART During the manufacture of a turbomachine, in order to ensure a good arrangement of the cables in the turbomachine that is compatible with the normal operation of the turbomachine, it is known to provide cable guiding devices to equip the connectors of said cables.

Such a guide device, when the cable comprises a connector whose outer peripheral surface for holding the guide device, is devoid of threading, is generally achieved by the use of a thermoformed piece. Such a part is obtained by placing a thermosetting sheath covering both the connector and the end of the cable connected to the connector. The cable is then placed according to the desired trajectory before a necking step that freezes the shape of the piece thus thermoformed and therefore the path of the cable. The thermoformed piece then acts as cable guide device.

If such a thermoformed part provides a cable guide device providing a guide cable whose direction is easily adaptable, it has a number of disadvantages. Indeed, the need to use a thermosetting material for the supply of the thermoformed part generates a significant supply cost of this part. In addition, during the implementation of the thermosetting part to form the thermoformed part, it is necessary to perform a shrink step which remains a long step and therefore impacts, because of the number of connectors present in a turbomachine , the entire production line of a turbomachine. DISCLOSURE OF THE INVENTION The present invention aims to remedy these drawbacks.

A first object of the invention is therefore to provide a cable guiding device which, being adapted to be mounted on an outer peripheral surface devoid of threading of a connector of the cable to be guided, has a cost of production not impacted by the use of a thermosetting material. Another object of the invention is to provide a cable guiding device which, being adapted to be mounted on an outer peripheral surface devoid of threading of a cable connector to guide, allows installation of said guiding device without requiring, as the solution of the prior art, a heavy necking operation of a thermosetting material. To this end, the invention relates to a cable guiding device, intended to equip a turbomachine connector, comprising: a mounting means adapted to mount the device on an outer peripheral surface of the connector, said outer peripheral surface being devoid of threading, - a guide arm having a first and a second end, the first end being integral with the mounting means, the second end, opposite the first end being adapted to retain, in cooperation with a retaining means, a cable equipped with said connector. Such a guiding device makes it possible, by using a guide arm held on the connector by a mounting means, to guide the cable in a guiding direction determined by the arm, without requiring the use of any thermosetting material. This avoids both the costs associated with such a thermosetting material and the need, during the installation of the device on the cable to be guided, of a long step of shrinking of a thermosetting material which is present for a measuring device. guidance of the prior art. The mounting means may be a reversible mounting means. Such reversible mounting means makes it possible to easily modify, by replacing or moving the guiding device, the trajectory of the cable without requiring, as is the case in the solution of the prior art, the damage to the device. guide. The mounting means may comprise an elastic interlocking system adapted to fit resiliently on the outer peripheral surface of the connector, the elastic interlocking system preferably comprising two resilient jaws. Such a nesting system allows mounting of the rapid guide device and simplified disassembly of the guide device on the connector fitted to the cable to be guided. The mounting means may be adapted to cooperate with a retaining collar for gripping. Such a possibility of cooperation allows a good fixing of the guide device on the connector which is robust and low cost while allowing a simple withdrawal of this fastener. Since the resilient interlocking system may comprise two resilient jaws, there may be provided on each of the resilient jaws a passage opening for the retaining collar. Such a passage opening present on each of the elastic jaws allows a simple cooperation of the holding collar with the system 10 of elastic interlocking. The connector defining a connection axis, the guide arm may comprise a bent portion separating a first and a second portion of the guide arm respectively comprising the first and the second end, the second portion extending from the bent portion. in a direction, called guide, different from that of the connection axis, the guide direction preferably forming an angle substantially equal to 90 °, 45 ° or 30 ° with the connection axis. By an angle substantially equal to 90 °, at 45 ° and at 30 ° is meant an angle between respectively 85 ° and 95 °, 40 ° and 50 °, and 25 ° and 35 °. Such an angled portion of the guide arm 25 allows the guide arm to have a portion extending in a guide direction which is different from that of the connection axis. Thus the cable can extend in a desired direction defined in advance, from the connector and with respect to the connection axis, such as for example a 45 ° path for a guide direction having the same angle screw to the connection axis. The guide arm may be made of a substantially rigid material and preferably of stainless steel. By substantially rigid material is meant a material whose Young's modulus is greater than 160 GPa. Such a material makes it possible, whatever the stresses exerted by the cable, to maintain the guiding direction and thus to preserve the trajectory of the cable. The invention also relates to a turbomachine connection system, comprising: a connector intended to be connected to a complementary connector of a turbomachine, a cable equipped with said connector, a device for guiding the cable from the connector, the guiding device being a guiding device according to the invention, and the connection system further comprising retaining means adapted to retain the cable on the second end of the guide arm.

Such a connection system allows the connection of a turbomachine equipment, such as a temperature sensor, without the connection cable has a path that is detrimental to the proper functioning of the turbomachine, the path of the cable can be adapted by the presence of the guiding device. Moreover, such a system does not have the disadvantage of requiring the implementation of a piece of thermosetting material thus avoiding any additional cost associated with such a material and the need to make a heavy step of shrinkage of a thermosetting material. The retaining means may comprise a retaining system selected from the group consisting of, a resilient interlocking system, a hoop, a retaining sheath, and a retaining tape.

Such restraining systems each make it possible to simply and robustly maintain the cable on the guide arm so as to ensure the maintenance of the trajectory of the connection cable. The invention also relates to a turbomachine comprising a connection system according to the invention. Such a turbomachine has a reduced production cost compared to a turbomachine of the prior art, the maintenance of the cables in a path compatible with the proper functioning of the turbomachine being obtained by means of cable guide devices that do not require the expensive use of thermosetting materials. BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be better understood on reading the description of exemplary embodiments, given purely by way of indication and in no way limiting, with reference to the appended drawings in which: FIG. a turbomachine cable having a connector equipped with a guide device and whose cable retention system on the guide device is a retaining sheath, - Figures 2a, 2b and 2c respectively illustrate a side view, a view front view and a perspective view of a guide device according to a first possibility of the invention in which the guide direction D forms an angle of 45 ° with the connection axis C of the connector, - Figure 3 illustrates a side view of a guiding device according to a second possibility of the invention in which the guiding direction D forms an angle of 90 ° with the connection axis C of the connector, - the figure 4 illustrates a side view of a guiding device according to a second possibility of the invention in which the guiding direction D is in continuity with the connection axis C of the connector, - FIG. a turbomachine cable comprising a connector equipped with a guiding device according to the invention, the cable retention system on the guiding device being a hoop, - Figure 6 illustrates a close-up view of FIG. 1 showing the system retaining cable on the guide device. Identical, similar or equivalent parts of the different figures bear the same numerical references so as to facilitate the passage from one figure to another.

The different possibilities (variants and embodiments) must be understood as not being exclusive of each other and can be combined with one another.

DETAILED DESCRIPTION OF PARTICULAR EMBODIMENTS FIG. 1 illustrates the end of a turbomachine cable 10 comprising a connector 11 on which is mounted a cable guiding device 100 according to a first possibility of the invention in which the retention of the cable on the guiding device is obtained by the use of a holding sheath. The connector has an outer peripheral surface devoid of threads. The connector defines a connection axis C, said connection axis C corresponding to the direction of engagement of the connector when connected to a complementary connector. The cable may be any type of cable fitted to a turbomachine and is preferably a connection cable adapted to connect a turbomachine equipment with a turbomachine processing unit. The guiding device 100, as illustrated in FIGS. 2a to 2c, comprises: two elastic jaws 121, 123 connected to one another by a central zone 130 of the guiding device 100, a guide arm 110 which is extends from the central zone 130 in a longitudinal general direction.

The guiding device 100 is made of a substantially rigid material which may be metallic, this material being preferably stainless steel.

Here is meant by a substantially rigid material a material whose Young's modulus is greater than 160 GPa. The central zone 130, as illustrated in FIG. 2c, is an area of the substantially planar guiding device. The central zone 130 has a parallelepipedal general shape whose thickness is reduced with respect to the width and to the length. By reduced thickness with respect to the width and the length is meant a thickness which is less than at least 5 times the smallest value of the width and length and preferably less than 10 times the same smaller value. The central zone 130 has a first and a second longitudinal edge.

Each of the elastic jaws 121, 123 extends substantially laterally from a respective longitudinal edge of the central zone 130. Each resilient jaw 121, 123 has a cross-section in the shape of an arc of a circle, the section being made according to a direction substantially perpendicular to the longitudinal edge from which extends said elastic jaw. The elastic jaws 121, 123 extend one opposite to the other, thus making it possible to grip the outer peripheral surface 11a of the connector 11 on which the guide device 100 is intended to be mounted. The dimensions of each of the jaws resilient 121, 123 are adapted for mounting on the outer peripheral surface 11a of the connector 11. Each elastic jaw 121, 123 has an end connected to the central zone 130, said end having a through hole 122, 124 adapted for the passage 15. Each of the passage orifices 122, 124 is an elongated passage substantially parallel to the longitudinal edge 10 corresponding to the elastic jaw 121, 123 having said passage opening 122, 124. The elastic jaws 121, 123 and the central zone 130 form a resilient interlocking system 120. Such a rigid interlocking system 120 constitutes a mounting means ad adapted to mount the guide device 100 on the outer peripheral surface 11a of the connector 11. The mounting means formed by the resilient jaws 121, 123 and the central zone 130 is a reversible mounting means i.e. it is adapted to allow disassembly of the guiding device 100 of the connector 11 without requiring damage to the guiding device 100 and / or the connector 11. The retaining collar 15 is, as illustrated in FIG. holding collar 15 which encloses the guide device 100 at its elastic jaws 121, 123. The retaining collar 15 may be any type of collar known to those skilled in the art, such as a screw collar or a collar 30 clip.

The guide arm 110 is in the form of an elongated piece having a substantially rectangular cross section, the cross section being a section substantially perpendicular to the longitudinal direction of the guide arm 110. The thickness of the cross section of the arm Guiding 110 is substantially reduced with respect to the width. By reduced thickness of the cross section of the guide arm 110 relative to the width is meant a thickness which is less than at least 5 times the width and preferably less than 10 times this same width. The guide arm 110 has a first and second end 111, 112, the first end 111 being integral with the central zone 130 and the second end 112, opposite the first end 111 being adapted to retain the cable 10 by means of a holding sheath 30, as illustrated in FIG. 1. The guide arm 110 also has a bent portion 113 separating a first and a second portion 114, 115 of the guide arm 110. The first and the second portion 114, 115 have the first and second ends 111, 112, respectively. The first portion 114 extends from the central zone 130 on one of the lateral edges of this same zone, the lateral edge opposite the connector 11. The first portion 114 extends from the central zone 130 along the connection axis C in the direction of the cable 10 equipped with the connector 11. The second part 115 extends from the bent portion 113 in a direction guiding principle D.

The guide direction D forms, as illustrated in Figure 2a an angle of 45 ° with the connection axis C. The guide device 100, the connector 11 and the cable 10 form a connection system 1 of a turbomachine.

A guiding device 100 is mounted on a connector 11 fitted to a cable 10 according to a method comprising the steps of: - mounting the guiding device 100 on the connector 11 equipping the cable 10 to be guided by means of the central zone 130 and elastic jaws 121, 123, this assembly being made so that the elastic jaws 121, 123 fit on the outer peripheral surface 11a of the connector 11, install the retaining collar 15, the retaining collar 15 passing through the orifices passage 122, 124 of the elastic jaws 121, 123 so as to grip, as illustrated in FIG. 1, the two elastic jaws 121, 123, position the cable 10 along the guide arm 110, place the retaining sheath 30, as shown in Figure 1, so as to retain the cable 10 along the second portion 115 of the guide arm 110.

Such a method may also include a shrink step if the retaining sheath 30 is a heat-shrinkable sheath. Such a retaining sheath 30 makes it possible to have the advantages associated with the use of a thermosetting sheath of the prior art, without presenting the additional costs associated with the use of a thermosetting material and without presenting the heaviness of the step of shrinking of such a material, the shrinking step of a heat-shrinkable material being simplified vis-à-vis that necessary for a thermosetting material. FIG. 3 illustrates a guiding device 100 according to a second possibility of the invention in which the guiding direction D makes an angle of 90 ° with the connection axis C. A guiding device 100 according to this possibility is distinguished from a device according to the first possibility in that the first and the second portion 114, 115 of the guide arm 110 form an angle of 90 ° instead of 45 °. The mounting of such a guiding device 100, when made by means of a holding sheath 30 is identical to that of a guiding device 100 according to the first possibility.

FIG. 4 illustrates a guiding device 100 according to a third possibility of the invention in which the guiding direction D is along the connection axis C of the connector 11 in the direction of the cable 10 to be guided.

A guiding device 100 according to this third possibility is distinguished from a guiding device 100 according to the first possibility in that the guide arm 110 does not comprise a bent portion 113 and in that the first and the second part 114, 115 the guide arm 110 both extend in an identical direction which is along the connection axis C towards the cable 10 to be guided. According to this third possibility, the second part extends in the extension of the first part. The mounting of such a guiding device 100 when it is made by means of a retaining sheath 30 is identical to that of a guiding device 100 according to the first possibility. FIGS. 5 and 6 illustrate a connection system according to a fourth possibility of the invention according to which the retention of the cable 10 on the guiding device 100 is obtained by means of a hoop 30 'in combination with a hooking pad 31. A guiding device 100 according to this fourth possibility differs from a guiding device 100 according to the first possibility in that it is suitable for use with a hoop 30 'in combination with a gripping shoe 31. Such an adaptation of the guide device 100 is obtained by providing on the second end of the guide arm 100 a stop zone 116. The abutment zone is formed at the end of the second end. The abutment zone 116 being formed by an enlargement of the guide arm 110. This abutment zone 116 is adapted to abut the hoop 30 '30 and thus limit the risk of falling of the hoop 30' when the guide device 100 is in place on a cable 10. The mounting of a guide device 100 according to this fourth possibility differs from the mounting of a guide device 100 according to the first possibility in that it comprises instead of positioning steps of the cable 10 along the guide arm 110 and placing the retaining sheath 30, the steps of: - positioning the cable 10 along the guide arm 110 with the fixing shoe 31 between the guide arm 110 and the cable 10, and place the hoop 30 'around the guide arm 110 and the cable 10 so as to retain the cable 10 on the guide arm 110. If according to the various possibilities described above the mounting of the guide device 100s the connector 11 is formed by means of the elastic jaws 121, 123 and the central zone 130, any other holding means allowing mounting of the guide device 110 on the outer peripheral surface 11a of the connector 11 can be implemented without it is outside the scope of the invention. Thus it is also conceivable, without departing from the scope of the invention to mount, for example, the guide device 100 by means of a combination of a hoop and a hanging shoe. Similarly, if in the various possibilities described above the retaining means 30 described is either a hoop 30 'combined with a gripping pad 31 or a retaining sheath 30, the retaining means may be any other retaining means. known to those skilled in the art, such as a resilient interlocking system or a holding tape, without departing from the scope of the invention. In the case where the retaining means is a resilient interlocking system, the latter can be used in combination with a retaining collar. Similarly, if the guiding devices according to the different possibilities described above, have guide directions D which are, with respect to the connection axis C, 0 °, 45 ° and 90 °, the guiding direction D presented by the device can be any angle between 0 and 180 ° with the possibility that the connection axis and the guide direction is included in the same plane, this without going out of the box. 'invention. If the guiding devices according to all the possibilities described above comprise a guide arm whose cross section is rectangular, the guide arm may have a different section, such as a section in an arc of a circle, without the it is outside the scope of the invention.

Claims (10)

REVENDICATIONS1. Cable guiding device (100) for fitting a turbomachine connector (11), characterized in that it comprises: - a mounting means adapted to mount the guiding device (100) on a surface outer periphery (11a) of the connector (11), said outer peripheral surface (11a) being devoid of threads, - a guide arm (110) having first and second ends (111, 112), the first end (111), ) being secured to the mounting means, the second end (112), opposite the first end (111), being adapted to retain, in cooperation with a retaining means, a cable (10) provided with said connector (11). The guiding device (100) according to claim 1, wherein the mounting means comprises a resilient interlocking system (120) adapted to engage elastically on the outer peripheral surface of the connector, the elastic interlocking system. preferably comprising two elastic jaws (121, 122) 3. Guiding device (100) according to claim 1 or 2, wherein the mounting means is adapted to cooperate with a retaining collar 30 (15) for gripping. 4. guiding device (100) according to claims 2 and 3, wherein, the resilient interlocking system (120) comprising two resilient jaws (121, 123), it is provided on each of the elastic jaws (121, 123). a through hole (122, 124) for the holding collar (15). A guiding device (100) according to any one of the preceding claims, wherein the connector (11) defining a connection axis (C), the guide arm (110) comprises a bent portion (113) separating a first (114) and a second portion (115) of the guide arm (110) respectively having the first and second ends, the second portion (115) extending from the bend portion (113) in a direction (D) , said guide, different from that of the connection axis (C), the guide direction (D) preferably forming an angle substantially equal to 90 °, 45 ° or 30 ° with the connection axis (C). The guiding device (100) according to any one of the preceding claims, wherein the guide arm (110) extends in a generally longitudinal direction from the mounting means, the guide arm (100) having a substantially rectangular cross section whose thickness is substantially reduced with respect to the width. 7. A guiding device (100) according to any one of the preceding claims, whereininthe guide arm (110) is made of a substantially rigid material and preferably stainless steel. A turbomachine connection system (1), comprising: a connector (11) for connection to a complementary connector of a turbomachine, a cable (10) equipped with said connector (11), a guiding device (100). the cable (10) from the connector (11), the connecting system (1) being characterized in that the guiding device (100) is a guiding device (100) according to any one of the preceding claims, and in that the connection system (1) further comprises a retaining means adapted to retain the cable (10) on the second end (112) of the guide arm (110). A turbomachine connection system (1) according to claim 8, wherein the retaining means comprises a retaining system selected from the group comprising, an elastic interlocking system, a hoop (30 '), a retaining sheath (30) and a holding tape. 10. Turbomachine characterized in that it comprises a connection system (1) according to claim 8 or 9.