Cable bundle positioning and retaining station in turbojet engines

FIELD: electricity.

SUBSTANCE: cable bundle (3) positioning and retaining station on the turbojet engine (1) housing (2) includes bundle supports (3) standardized for directions perpendicular to the turbojet engine (1) axis (4) and bundle supports standardised for directions parallel to the turbojet engine (1) axis (4).

EFFECT: reduction of manufacturing cycle cost and time.

14 cl, 10 dwg

 

The invention relates to a device for positioning and holding bundles of electric wires on the body turbojet engine and to a method of assembling wire harnesses electrical wires on the body.

As shown in figure 1, the turbojet engine 1 includes a housing 2, possibly composed of several parts in accordance with its design, which surrounds the various components of the engine, which may be rotating or not rotating, such as fan, compressor, combustor, turbine, nozzle and, if necessary, the backburner.

On the outer surface of the housing 2 except for pipelines for the transportation of liquids placed a lot of electrical cables known in the field of turbojet engines, the wiring 3 electrical cables. These bundles of electrical cables are fed, in particular, various items of peripheral equipment turbojet engine 1.

The wiring 3 electrical cables are usually mounted on the housing 2 by means of sheet metal straps or plates, in which their zamalchivaut at regular intervals for firm retention. Clamps and plates are attached or welded to the flanges or projections of the housing 2. The attachment point is determined for each case separately depending on wiring harness 3 that you want to keep, and from the urgency of a possible replacement. In addition, each individual harness must be able to be replaced individually.

As a result, the Assembly of all withing 3 cables are not standardized and time-consuming, which adversely affects the cost and duration of the production cycle, but also increases the weight due to the presence of a variety of sheet metal parts.

The aim of the present invention is to eliminate these disadvantages.

In this regard, the present invention relates to a device for positioning and holding bundles of electrical cables on the body turbojet engine in which the housing forms an outer shell around the axis of the turbojet engine, characterized in that it comprises a first support wire harnesses, standardized for directions essentially perpendicular to the axis of the turbojet engine, and the second support wire harnesses, standardized for directions essentially parallel to the axis of the turbojet engine.

Preferably, the first support wire harnesses, standardized for essentially perpendicular directions, include the brackets with the case in which you have the socket to hold the harness.

Preferably, the second support wire harnesses, standardized for essentially perpendicular directions, include drums with housing in General cylindricus the second form, along which made socket to hold the harness.

Preferably, the reel is attached to the blank pipe, rigidly fixed on the casing of the turbojet engine.

Other features and advantages of the invention follow from the following description of a preferred variant of the invention, with reference to the accompanying drawings, on which:

figure 1 is a perspective view of the turbojet engine;

figure 2 is a perspective front view of the bracket of the device corresponding to the invention;

figure 3 is a perspective side view of the bracket of the device corresponding to the invention, the retaining harness;

4 is a schematic perspective view of the front housing turbojet engine, to which is attached the brackets to the device corresponding to the invention;

5 is a schematic perspective front view of the first variant implementation of the drum of the device corresponding to the invention;

6 is a perspective side view of the drum shown in Fig. 5, the retaining Assembly;

7 is a schematic perspective front view of the second variant of realization of the drum of the device corresponding to the invention;

Fig is a perspective side view of the drum shown in Fig. 7, the retaining Assembly;

Fig.9 is a perspective side view of the blank pipe is a device corresponding to the invention; and

figure 10 is a perspective view of the housing turbojet engine, is attached to the pipe and drums of the device corresponding to the invention.

As shown in figure 1, the turbojet engine 1 includes a housing 2 surrounding the various components. This housing 2 is held generally on the outside of the structure around the axis 4 of the turbojet engine 1. Outside the housing 2 stack the bundles of electric cables. Figure 1 shows a turbofan engine, known from the prior art, on which surface the wiring 3 electrical cables are without any apparent order.

The aim of the present invention is to streamline the placement of the wiring harness 3 electric cables.

The device corresponding to the present invention includes a bracket 10, one of which is shown in figure 2. The bracket 10 has a body 11 having generally the shape of a parallelepiped, preferably made of plastic. On the bottom surface 12 of the bracket 10 has two mounting lugs 14, 14'. In its upper part 13 is made socket 15A, 15b, 15c, 15d, the shape of which matches the shape of the wiring harness 3 electric cables. Sockets 15A, 15b, 15c, 15d is formed during the moulding of the plastics which perform the bracket 10. Their configuration may vary from bracket to bracket C is depending on the purpose of the latter, this adaptation provides using a special configuration of the molded plastic.

As shown in figure 3, the slots 15A, 15b, 15c, 15d are designed to receive bundles 3A, 3b, 3c, 3d electrical cables, respectively. The wiring 3A, 3b, 3c, 3d are in the form of a cylindrical tube made of an insulating material, in which is inserted an electrically conductive cables. More specifically, each harness 3A, 3b, 3c, 3d includes a ring forming a cylindrical bearing 30A, 30b, 30c, 30d, respectively, inserted into the slot 15A, 15b, 15c, 15d, and its diameter is adapted to the diameter of the slot 15A, 15b, 15c, 15d, holding the specified support. Each ring 30a, 30b, 30C, 30d contains located at each of its ends to the rim, the diameter of which exceeds the diameter of the slot 15A, 15b, 15c, 15d, in which the ring is inserted, to prevent any movement of the harness 3A, 3b, 3c, 3d in the longitudinal direction.

Figure 4 shows the brackets 10, 10', 10" of the above type, is attached to the housing 2 turbojet engine 1 to hold the bundles 3A, 3b, 3c, 3d of the cables are in place. In this embodiment of the invention, the brackets 10, 10', 10" are designed to hold bundles 3A, 3b, 3c, 3d orientation in a given direction on the outer surface of the housing, essentially perpendicular to the axis 4 of the turbojet engine 1.

The brackets 10, 10', 10" can CIDP is eplate to the housing 2 in a variety of ways. Here the selected attachment to the annular flange 16 of the housing 2, which run in the circumferential direction, perpendicular to the axis 4. Mentioned flanges 16 may be, for example, straight or T-shaped cross-section. System 17 of the bolt-nut provides fastening lugs 14 when installing the brackets 10, 10', 10" on the flanges 16. You can also use the quick-release fastening means, for example, snap-on type for easy positioning and replacement brackets 10, 10', 10".

The wiring 3A, 3b, 3c, 3d does not always have the same diameter; accordingly, different slots of each bracket 10, 10', 10" give proper dimensions by providing the necessary sizes technological forms for plastic injection molds.

The brackets 10, 10', 10" are mounted on the housing 2 in accordance with the location of the bundles 3A, 3b, 3c, 3d on the outer surface of the housing 2, which can be preconfigured. Thus, it is possible to form groups of bundles 3A, 3b, 3c, 3d, stacked parallel to each other for ease of Assembly on a production line, a clear vision of their location, as well as facilitate their replacement. In addition, the brackets 10, 10', 10" can be standardized relative to cable assemblies, they should keep and which also standardized; in particular, this standardization can be done for all models turbojet engine in the lei from the same manufacturer and even model turbojet engines of different manufacturers, providing the globalization of the classification of the location of cable assemblies for turbine engines.

The choice of location withing groups usually can only be done taking into account all of the route on which each specific cable bundle runs along the outer surface of the housing 2. Thus, the brackets 10, 10', 10", corresponding to the invention, used in a maximum possible number line placement withing one group, and when a particular harness must be made from the obtained ring "route", it is held on the housing 2 to the end point of attachment using conventional retaining means, made for example from sheet metal.

The device corresponding to the invention, also contains drums such as drum 20, is shown in figure 5. The drum 20 has a body 21 having a generally cylindrical configuration and preferably made of plastic. The drum 20 has a Central hole 22 with a radial slot 23 extending from its center to its lower outer part and dividing the latter into two fixing lugs 24, 24'. In the rest of the outside of the drum has a slot 25A, 25b, 25c, 25d, 25e, 25f with radial holes for inserting wire harnesses 3 cables. The slots 25A, 25b, 25c, 25d, 25e, 25f is formed during the process of moulding plastics to obtain the drum 20. Their configuration is tion can vary from one drum to the other in accordance with its use, and according to the configuration, ensure the implementation of the special configuration of the technological moulds for plastics.

As shown in Fig.6, the drum 20 is attached to stall the pipeline 40. Like the flanges 16, the retaining brackets 10, 10', 10" on the body 2, line 40 holds the drum 20 in a fixed position relative to the housing 2 as one with him. This pipeline 40, shown here as a single, because it is not designed for holding liquid, forms a support for the drum 20 on the housing 2. In accordance with the location selected for the wiring harness 3, the pipe 40 can be selected from a number of pipelines that already exist and are used for holding liquid in the turbojet engine 1.

In this embodiment of the invention, the drum 20 is attached to the pipe 40 through a system of 26 bolt/nut cooperating with lugs 24, 24'. In addition, the pipe 40 includes a ring 41 that communicates with the walls of the hole 22. According to a variant embodiment of the invention, use quick release mounting system. Regardless of its construction, the mounting system must prevent longitudinal and rotary displacement of the drum 20 by the pipe 40.

As well as in relation to the brackets 10, 10', 10", slot 25A, 25b, 25c, 25d, 25e, 25f drum 20 are designed to receive ghuto the 3 a, 3'b, 3'c, 3'd, 3'e, 3'f, respectively. As described above, each harness 3 a, 3'b, 3'c, 3'd, 3'e, 3'f contains the ring, consistent with its slot 25A, 25b, 25c, 25d, 25e, 25f, and with restraint in the longitudinal direction of the headbands.

The drum 20, is shown in figure 5, contains six slots 25A, 25b, 25c, 25d, 25e, 25f. However, you may require fewer nests, if along the pipeline 40, on which is mounted the drum 20 will be fewer harnesses 3.

However, it is preferable to have a technological form for casting plastic drums of a standardized type, in General, does not depend on the number of nests, that is, a form that has a generally cylindrical configuration, is the same regardless of the number of performed nests.

The number of nests can be set during molding by locating the proper number of inserts inside the industrial moulds for plastics. The latter should provide the maximum required number of nests for all lines carrying bundles on the outer surface of turbojet engine with the ability to remove some of them. This feature is required because it is unacceptable to leave the nest empty. Indeed, a specialist working with a turbojet engine, must be convinced that all of the wiring n the place, empty nest indicates that, presumably, the harness is not laid on the place.

7 shows the drum 120, obtained by applying the same technological forms, as and for receiving drum 20 shown in Fig. 5, when this form has been modified to make the nests of other configuration. Thus, the drum 120 has four slots 125, 125C, 125d, 125e for wire harnesses, which occupy the same angular position in the drum 120, and the slot 25A, 25C, 25d, 25e in the drum 20, but here some of them have different diameters. In addition, designated 125b, 125f, corresponding to the locations of the slots 25b, 25f in the drum 20, are void. Thus, it is possible to see that they are not adapted to hold the cable assemblies.

You can also assume that the space is not designed to hold the harness will not be void and will be occupied by the material.

You just need to use the form, the body of which contains a removable or adjustable parts.

In Fig. 8 shows the drum 120, attached to the pipe 40 as well as the drum 20 using system 126 bolt/nut instead which can use quick release mounting system. Slot 125, 125C, 125d, 125e keep the wiring 103 a, 103 C, 103'd, 103'e through the rings in the same manner as in the case of drum 20.

As shown in Fig.9, outside of the pipeline is od 40 is attached to the housing 2 by means of mounting lugs 42, 42', 42". He holds the ring or sleeve 41A, 41b, 41c, 41d, evenly spaced along its length and adapted for receiving the reels of the type indicated above. In Fig. 9 pipeline 40 is shown separately, without any other elements for a better understanding of its design, but in reality it corresponds to the pipeline 40, shown in Fig. 10.

As shown in Fig. 10, the pipe 40 shown in Fig. 9, is attached to the housing 2 by means of mounting lugs 42, 42', 42". Ring 41b and 41p hold the drums 120 and 20, respectively. Rings 41A and 41d keep other drums 220 and 320 formed in accordance with the wiring 3, which should be kept in those places. In this case, the reels 220 and 320 are, respectively, five and six jacks for cable assemblies.

The pipe 40 and the reel 20, 120, 220, 320, which he holds, thus, the preferred line styling withing 3 cables. In this embodiment, the device corresponding to the invention, the reels are designed to hold cable assemblies oriented in the directions of the external surface of the shell is essentially parallel to the axis 4 of the turbojet engine.

The location of the wiring harness 3 cables can be set in the development stage engine that allows you to provide a corresponding design of the drums 20, 120, 220, 320 and their location on the line is the gadfly 40. Figure 10 clearly illustrates this approach. Above it was clearly noted that the wiring cannot follow from the beginning to the end of the line along the pipelines 40 or flanges 16, and they are so only for the longest possible distance to the variations in the point of destination, where they may hold traditional fastening means. This case is shown in the example bundles 103 C and 103'd that after passing the lock drum 220 and drum 120 deviate from the path of the pipeline 40 for connection with equipment 50, for which they are intended.

Figure 10 shows the presence of the flange 16, as shown in figure 4, while showing part of the housing 2 is essentially the same in both figures. However, the brackets 10, 10', 10", and the wiring 3A, 3b, 3c, 3d, they can hold, not shown for clarity of the description of the drums, but it's easy to imagine all of the device corresponding to the invention, i.e. the brackets on the flange and the reel on the pipe, aligning the 4 and 10.

Predefined line laying cable assemblies can include, on the one hand, sections of the wiring harness that runs along the flanges and held in place by brackets, and, on the other hand, the sections of the wiring harness that runs along the (conditional) pipelines and held drums. This applies, for example, to the wire harness 3'f Fig. 6, after line segment laying the Dole pipeline 40, where it is held by the reel 20 and 320, changes direction and follows the trajectory perpendicular to the axis 4 of the turbojet engine, where it is retained by a bracket 100 which is a bit different from the bracket 10 of Fig. 2, but standardized in the same way.

It should be noted that as the drums, brackets are standardized in terms of number and sizes of nests, which they contain. Thus, in the manufacture of a standardized model of the bracket can simply by installing the appropriate inserts in the case of technological molds for casting plastic to reduce or increase the number of nests or resize them. In particular, a place that is not used to perform jacks or fill material, or leave in an explicit form, that is, so that you definitely see that in this recess is impossible to insert the harness.

Brackets and drums perform using the technology of molding plastics. Therefore, it is very easy to adapt their structure and their composition for a particular use case, for example, in accordance with the flexible or rigid needed parts. It is obvious that these parts may consist of several materials having different characteristics, including its flexible grooves or mounted behind one of the metal elements.

In the described embodiments, the implementation of the device corresponding to the invention, the brackets used to hold the wiring harness in the direction of the external surface of the shell is essentially perpendicular to the axis of the turbojet engine, and drums are used to hold the wiring harness in the direction of the outer surface of the housing essentially parallel to the axis of the turbojet engine. For mounting items to keep cable assemblies use flanges passing through the circumference of the body turbojet engine.

You can use any other type of element to hold the cable assemblies. It is quite possible adaptation of the geometric forms of the drums to the flanges.

Thanks to the device corresponding to the invention, and in view of the fact that the extreme points of stacking bundles known, it is possible to plan in advance a simple configuration of laying cables. Indeed, from one point to another trajectory in any location can be changed, at least for its most part, and can be a sum of two (or more) paths on the outer surface of the housing, one of which is essentially perpendicular, and the other essentially parallel to the axis of the turbojet engine.

Thus, during the final install engine assemblies consisting of bundles of cables and their supporting elements, can mouth afliate as more or less single unit, at least, in a standardized way, automatically and easily, and not in parts, as is done at present.

In addition, significantly simplifies routine maintenance turbojet engine. First of all, greatly simplifying the arrangement of the wiring harness. In addition, each bearing element can be mounted and removed individually. This applies to the individual tows, not to mention some groups of bundles, which, thanks to the invention, can be mounted and dismounted as a whole. In addition, you can not say that if the situation requires it, you can always add conventional fastening means, such as a clamp or plate.

1. A device for positioning and retaining the wiring harness (3) electrical cables on the housing (2) turbojet engine (1), in which case (2) forms an outer shell around an axis (4) turbojet engine (1), characterized in that it contains a support (10, 10', 10") for wire harnesses, standardized for directions essentially perpendicular to the axis of the turbojet engine, and a support (20, 120, 220, 320) for wire harnesses, standardized for directions essentially parallel to the axis of the turbojet engine.

2. The device according to claim 1, in which the supports for wire harnesses, standardized for directions essentially perpendicular to the axis, contain, what about the least one bracket (10, 10', 10") with an elongated body (11)in which you have at least one socket (15A, 15b, 15C, 15d) to hold the wire harnesses (3).

3. The device according to claim 2, in which the bracket(10, 10', 10"), at least partially composed of plastic.

4. The device according to claim 2, in which the bracket (10, 10', 10") includes a means for attachment to the flange (16) of the housing (2) turbojet engine (1).

5. The device according to claim 1, in which the supports for wire harnesses, standardized for directions essentially parallel to the axis of the engine, contain at least one cylinder (20, 120, 220, 320) with a cylindrical body (21)in which you have at least one socket (15A, 15b, 15C, 15d) to hold the wire harnesses (3).

6. The device according to claim 5, in which the drum(20, 120, 220, 320), at least partially composed of plastic.

7. The device according to claim 5, in which the drum (20, 120, 220, 320) includes a means for attaching to the pipe (40), firmly fixed on the housing (2) turbojet engine (1).

8. The device according to claim 7, in which the pipeline (40) contains at least one ring (41A, 41b, 41p, 41d)holding the drum(20, 120, 220, 320).

9. The device according to claim 7, in which the pipe (40) is idle pipeline.

10. The device according to claim 1, in which the support(10, 10', 10", 20, 120, 220, 320) wiring harness (3) is attached by means of system (16, 26) bolt/nut.

11. The device according to claim 1, in which the support (10, 10', 10", 20, 120, 220, 320) harnesses attached using a quick release fastening system.

12. Method of assembling wire harnesses (3) electrical cables turbojet engine (1) on the housing (2)forming the outer shell around an axis (4) turbojet engine (1), characterized in that the bundles have at least partially along a direction essentially perpendicular and parallel to the axis (4) turbojet engine (1).

13. Method of assembling wire harnesses (3) electrical cables indicated in paragraph 12, in which the wiring (3) attach using the device for positioning and retaining the wiring harness according to one of claims 1 to 11.

14. Set of wiring harness (3) and supports(10, 10', 10", 20, 120, 220, 320) for bundles containing characteristics of the supports according to one of claims 1 to 11, in which the wiring (3) contain a ring (15A, 15b, 15C, 15d), intended to be placed in support(10, 10', 10", 20, 120, 220, 320) for cables.



 

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EFFECT: enhanced reliability of gas-turbine unit and ability of its off-line operation.

1 cl, 1 dwg

The invention relates to the field of aircraft propulsion, specifically to aircraft engines with built-in generators, resulting in rotation without an intermediate gearbox

The invention relates to the field of energy and can be used in heat exchange systems for gas turbine units (GTU) with a liquid or gaseous coolant
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