Slat slide rail sleeve

Abstract

The slat sliding rail sleeve is good in drainage effect, low in structural design cost and beneficial to inspection and maintenance. The slat sliding rail sleeve is used for containing a sliding rail of an aircraft slat. The slat sliding rail sleeve comprises a sleeve body with an opening formed in one end, the wing structure beam is used for mounting the sleeve body; the drainage pipe is located on the side, opposite to the sleeve body, of the wing structure beam, and the inner space of the sleeve body is provided with a sliding rail containing space used for containing the sliding rail and allowing the sliding rail to move; the drainage cavity is formed in the lower portion of the sliding rail containing space, and the drainage pipe is communicated with the drainage cavity.

Description

Technical Field

[0001] This utility model relates to a slat rail sleeve that can be used, for example, in aircraft. Background Technology

[0002] In civil aircraft, slats are supported by radial bearings on the fixed leading edge of the wing via rails. The rails are retracted and extended via a rack and pinion mechanism. When retracted, the slat rails pass through the integral fuel tank area of ​​the wing. Therefore, a rail sleeve is designed on the wing's front spars to meet the fuel tank sealing requirements. During actual operation, liquids such as water and de-icing agents may enter the sleeve. If residual liquid accumulates at the bottom of the sleeve, it will cause structural corrosion. Therefore, a drain pipe is designed at the bottom of the sleeve to meet structural drainage requirements. The outer surface of the drain pipe is immersed in the fuel tank, while its inner surface is in contact with the external atmosphere and liquids such as rainwater, anti-icing agents, and pesticides encountered during operation. Gravity drains the accumulated liquid inside the sleeve from the lower wing panel joint to the outside.

[0003] The drain pipe is located inside the fuel tank, which places high demands on the drain pipe assembly's performance in terms of pressure resistance and leak prevention. The internal environment of the fuel tank is complex with many structural / system components, so the drain pipe must avoid interference with the surrounding structure when planning the drainage path. At the same time, its poor accessibility also makes it difficult to inspect and maintain.

[0004] For example, a patent application filed by Commercial Aircraft Corporation of China, Ltd. (COMAC) is titled CN111703567A, entitled "Sleeve and Manufacturing Method Thereof." The sleeve wall of this patent includes an inner layer, an outer layer located radially outward from the inner layer, and a honeycomb structure disposed between the inner and outer layers. The honeycomb structure comprises multiple honeycomb cells and multiple cell walls, with the cells separated from each other by the cell walls, which extend radially between the inner and outer layers. This invention improves structural rigidity while significantly reducing structural weight and enhancing sealing. However, this solution does not address the maintainability and reliability issues caused by the drain pipe passing through the fuel tank area.

[0005] In addition, a patent application (CN217416093U) filed by the Beijing Civil Aircraft Technology Research Center of Commercial Aircraft Corporation of China, Ltd. (COMAC) is titled "An Aircraft Rail Sleeve Based on Additive Manufacturing Design." This patent claims an aircraft rail sleeve based on additive manufacturing design, which eliminates traditional welding and machining processes through an integrated design, shortening the overall manufacturing cycle. It also optimizes the drain port design, improving the drain efficiency. However, this solution does not address the maintainability and reliability issues caused by the drain pipe passing through the fuel tank area.

[0006] As mentioned above, the drain pipes of mainstream aircraft are usually located inside the fuel tank, resulting in high design costs for the drain pipe assembly and making later inspection and maintenance difficult. Due to space limitations, the drain outlet in traditional structures cannot be located at the lowest point of the sleeve, causing residual liquid to accumulate inside the sleeve, which can corrode the sleeve and affect its service life. Utility Model Content

[0007] In view of the above problems, the purpose of this utility model is to provide a slat slide rail sleeve with good drainage effect, low structural design cost and convenient inspection and maintenance.

[0008] To achieve the aforementioned objective of this utility model, this utility model provides a slat rail sleeve for accommodating the rail of an aircraft slat. The slat rail sleeve includes: a sleeve body with an opening at one end; a wing structural beam for mounting the sleeve body; and a drain pipe located on the side opposite to the sleeve body relative to the wing structural beam. The internal space of the sleeve body has: a rail accommodating space for accommodating the rail and allowing the rail to move; and a drain cavity disposed at the lower part of the rail accommodating space, with the drain pipe communicating with the drain cavity.

[0009] According to the slat rail sleeve of this utility model, since the drain pipe is located on the opposite side of the sleeve body relative to the wing structural beam, that is, outside the fuel tank, the requirements for the pressure resistance, leakage prevention, and other performance characteristics of the drain pipe components are not high, which can reduce structural design costs and facilitate inspection and maintenance. Furthermore, since a drain cavity is provided in the lower part of the rail receiving space, and the drain pipe communicates with this drain cavity, the drain cavity is positioned low, which facilitates the drainage of accumulated liquid inside the sleeve body through the drain pipe, resulting in good drainage performance. In other words, this utility model provides a slat rail sleeve with good drainage performance, low structural design costs, and ease of inspection and maintenance.

[0010] Preferably, the drainage cavity is formed from one side of the opening along the lower part of the slide rail receiving space, and the bottom end of the drainage cavity has a lowest point, which is not higher than any part of the internal space of the sleeve body other than the lowest point when the aircraft is parked or in level flight, and the drainage pipe communicates with the lowest point of the drainage cavity.

[0011] According to the slatted slide rail sleeve of this utility model, since the drainage chamber has a lowest point and the drainage pipe is connected to the lowest point of the drainage chamber, it can avoid the existence of local low-lying spaces where liquid accumulates in the internal space of the sleeve body, and can further improve the drainage effect.

[0012] Preferably, when the slide rail accommodating space is cut along the height direction perpendicular to the length direction of the sleeve body, the cross-sectional shape of the slide rail accommodating space is approximately quadrilateral, and the cross-sectional shape of the drainage cavity is approximately triangular.

[0013] According to the slatted slide rail sleeve of this utility model, both a slide rail receiving space and a drainage cavity can be easily formed.

[0014] Preferably, when the sleeve body is cut along its length, the slide rail receiving space extends in an arc shape along its length, and the lower wall of the drainage cavity is a straight line shape that slopes upward from the opening side.

[0015] According to the slatted slide rail sleeve of this utility model, since the lower wall of the drainage cavity is a straight line shape that slopes upward from the opening side, the opening side of the drainage cavity can be easily formed as the lowest part.

[0016] Preferably, a slide rail passage and a drainage passage are provided on the wing structural beam, the slide rail passage is connected to the slide rail receiving space, and the drainage passage connects the drainage pipe to the drainage cavity.

[0017] According to the present invention, since there is no need to open a drainage hole on the sleeve body inside the fuel tank as in the prior art, the reliability of the sleeve body can be improved.

[0018] Preferably, the slide rail passage and the drainage passage are not connected and are formed separately.

[0019] The slat rail sleeve of this utility model can ensure the strength of the wing structural beam.

[0020] Preferably, the slide rail passage and the drainage passage are connected and formed as one unit.

[0021] According to the slat rail sleeve of this utility model, it is possible to easily form rail passages and drainage passages on the wing structural beam.

[0022] Preferably, one end of the drain pipe is connected to the drainage passage, and the other end of the drain pipe is connected to a drain outlet opened on the lower wall panel of the aircraft wing.

[0023] According to the slat rail sleeve of this utility model, since the drain outlet is opened on the lower wing panel outside the fuel tank, it is not necessary to open the drain outlet on the lower wing panel inside the fuel tank as in the prior art. Therefore, the reliability of the lower wing panel can be improved.

[0024] Preferably, the sleeve body is connected to the wing structural beam via a flange disposed on the sleeve body.

[0025] According to the slat rail sleeve of this utility model, the sleeve body can be easily installed to the wing structural beam using a flange. Attached Figure Description

[0026] Figure 1 This is a front view showing the structure of the slatted slide rail sleeve according to an embodiment of the present invention.

[0027] Figure 2 This is a rear view showing the structure of the slat rail sleeve according to an embodiment of the present invention.

[0028] Figure 3 This is a front sectional view showing the structure of the slatted slide rail sleeve according to an embodiment of the present invention.

[0029] Figure 4 This is a side view showing the structure of the sleeve body of the slat rail sleeve according to an embodiment of the present invention.

[0030] Figure 5 This describes the structure of the sleeve body of the slat rail sleeve according to an embodiment of the present invention. Figure 4 AA sectional view.

[0031] Figure 6 This describes the structure of the sleeve body of the slat rail sleeve according to an embodiment of the present invention. Figure 5 BB cross-sectional view.

[0032] (Symbol Explanation)

[0033] 1. Slatted rail sleeve

[0034] 2. Sleeve body

[0035] 2a Slide rail accommodating space

[0036] 2a1 Upper wall

[0037] 2b Drainage chamber

[0038] 2b1 Lower wall portion

[0039] 3. Drain pipe

[0040] 4. Wing structural beams

[0041] 5 Connectors

[0042] 7 Flange

[0043] 8. Slide rail path

[0044] 9. Drainage passage

[0045] 10. Lower wall panel

[0046] 11 Drain outlet Detailed Implementation

[0047] Various embodiments of the present invention will now be described in detail, examples of which are shown in the accompanying drawings and described below. Although the present invention will be described in conjunction with exemplary embodiments, it should be understood that this specification is not intended to limit the present invention to those exemplary embodiments. Rather, the present invention is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents, and other embodiments that may be included within the spirit and scope of the present invention as defined by the appended claims.

[0048] Below, in conjunction with Figures 1 to 6 The slat slide rail sleeve 1 of the present invention will be described. Figure 1 This is a front view showing the structure of the slatted slide rail sleeve 1 according to an embodiment of the present invention. Figure 2 This is a rear side view showing the structure of the slatted slide rail sleeve 1 according to an embodiment of the present invention. Figure 3 This is a front sectional view showing the structure of the slatted slide rail sleeve 1 according to an embodiment of the present invention. Figure 4 This is a side view showing the structure of the sleeve body 2 of the slat rail sleeve 1 according to an embodiment of the present invention. Figure 5 This describes the structure of the sleeve body 2 of the slat rail sleeve 1 according to an embodiment of the present invention. Figure 4 AA sectional view. Figure 6 This describes the structure of the sleeve body 2 of the slat rail sleeve 1 according to an embodiment of the present invention. Figure 5 BB cross-sectional view.

[0049] (The overall structure of the slatted slide rail sleeve 1)

[0050] The following mainly refers to Figures 1 to 3 The overall structure of the slatted slide rail sleeve 1 according to the present invention will be described.

[0051] The slat rail sleeve 1 of this utility model embodiment is used, for example, in civil aircraft, to accommodate the rail (not shown) of the aircraft slat, so as to seal the fuel tank sealing gap caused by the rail penetrating the compartment.

[0052] like Figures 1 to 3 As shown, the slat rail sleeve 1 of this utility model includes: a sleeve body 2 with an opening at one end; a wing structure beam 4 for mounting the sleeve body 2; and a drain pipe 3, which is located on the opposite side of the sleeve body 2 relative to the wing structure beam 4.

[0053] The internal space of the sleeve body 2 includes: a slide rail receiving space 2a for accommodating and allowing the slide rail to move; and a drainage cavity 2b disposed at the lower part of the slide rail receiving space 2a.

[0054] The drain pipe 3 is connected to the drain cavity 2b. Specifically, a slide rail passage 8 and a drain passage 9 are provided on the wing structural beam 4. The slide rail passage 8 is connected to the slide rail receiving space 2a, and the drain passage 9 connects the drain pipe 3 to the drain cavity 2b.

[0055] In this embodiment, such as Figure 1 As shown, the wing structure beam 4 is formed in a roughly half-I-shape, but the shape of the wing structure beam 4 is not limited to this, as long as the sleeve body 2 can be installed.

[0056] In this embodiment, such as Figure 3 As shown, the slide rail passage 8 and the drainage passage 9 are not connected and are formed separately. That is, there is a partition wall between the slide rail passage 8 and the drainage passage 9. However, this utility model is not limited to this, and the slide rail passage 8 and the drainage passage 9 can also be connected to form an integral unit. That is, there is no partition wall between the slide rail passage 8 and the drainage passage 9.

[0057] One end of the drain pipe 3 is connected to the drain passage 9, and the other end of the drain pipe 3 is connected to the drain outlet 11 opened on the lower wall panel 10 of the aircraft wing.

[0058] The sleeve body 2 is connected to the wing structural beam 4 via a flange 7 mounted on the sleeve body 2. Specifically, the flange 7 is fastened to the wing structural beam 4 by bolts or other connecting parts 5, thereby mounting the sleeve body 2 onto the wing structural beam 4.

[0059] In this embodiment, such as Figure 3 As shown, the right side of the wing structural beam 4 is the area inside the fuel tank, and the left side of the wing structural beam 4 is the area outside the fuel tank. The liquid accumulated inside the sleeve body 2 flows through the drainage chamber 2b toward the wing structural beam 4 to the lowest part of the drainage chamber 2b (described later), and is discharged to the outside through the drainage passage 9 and the drainage pipe 3 from the drainage port 11.

[0060] (Specific structure of sleeve body 2)

[0061] The following mainly refers to Figures 4 to 6 The specific structure of the sleeve body 2 of the slat rail sleeve 1 according to the present invention will be described.

[0062] like Figures 4 to 6 As shown, the drainage chamber 2b is located from the opening side of the sleeve body 2 ( Figure 4 The left side of the slide rail receiving space 2a is formed along the lower part of the slide rail receiving space 2a, and the bottom end of the drainage cavity 2b has a lowest part that is not higher than other parts of the internal space of the sleeve body 2 when the aircraft is parked or in level flight. Figure 4 (The left side of the drainage cavity 2b in the middle). For example, Figure 3As shown, the drain pipe 3 is connected to the lowest part of the drain cavity 2b. Specifically, the drain pipe 3 is connected to the lowest part of the drain cavity 2b through the drain passage 9.

[0063] like Figure 5 As shown, when the sleeve body 2 is cut along its length, the slide rail accommodating space 2a is in the length direction ( Figure 5 Extending in an arc shape along the left and right directions, the lower wall 2b1 of the drainage cavity 2b extends from the opening side ( Figure 5 The left side of the slide rail receiving space 2a is an upwardly sloping straight line. Specifically, the upper wall 2a1 of the slide rail receiving space 2a is arc-shaped, the boundary line between the slide rail receiving space 2a and the drainage cavity 2b is also arc-shaped, and the lower wall 2b1 of the drainage cavity 2b is an inclined straight line so that the part of the drainage cavity 2b near the opening is the lowest part.

[0064] like Figure 6 As shown, when the slide rail receiving space 2a is cut along the height direction perpendicular to the length direction of the sleeve body 2, the cross-sectional shape of the slide rail receiving space 2a is approximately quadrilateral, and the cross-sectional shape of the drainage cavity 2b is approximately triangular.

[0065] (Technical effects of this utility model)

[0066] According to the slat rail sleeve 1 of this utility model, since the drain pipe 3 is located on the opposite side of the sleeve body 2 relative to the wing structural beam 4, that is, the drain pipe 3 is located outside the fuel tank, the requirements for the pressure resistance, leakage prevention, and other performance aspects of the related components of the drain pipe 3 are not high, which can reduce the structural design cost and facilitate inspection and maintenance. Furthermore, since a drain cavity 2b is provided at the lower part of the rail receiving space 2a, and the drain pipe 3 communicates with the drain cavity 2b, the position of the drain cavity 2b is low, which is conducive to draining the accumulated liquid in the sleeve body 2 from the drain pipe 3, resulting in good drainage effect. In other words, this utility model can provide a slat rail sleeve 1 with good drainage effect, low structural design cost, and convenient inspection and maintenance.

[0067] Furthermore, according to the slatted slide rail sleeve 1 of this utility model, since the drainage cavity 2b has a lowest point and the drainage pipe 3 is connected to the lowest point of the drainage cavity 2b, it is possible to avoid the existence of local low-lying spaces where liquid accumulates in the internal space of the sleeve body 2, thereby further improving the drainage effect.

[0068] Furthermore, the slatted slide rail sleeve 1 of this utility model can easily form both a slide rail receiving space 2a and a drainage cavity 2b.

[0069] Furthermore, according to the slatted slide rail sleeve 1 of this utility model, since the lower wall portion 2b1 of the drainage cavity 2b is a straight line shape that slopes upward from the opening side, the opening side of the drainage cavity 2b can be easily formed as the lowest part.

[0070] Furthermore, the slat rail sleeve 1 of this utility model does not require a drainage hole to be opened on the sleeve body 2 inside the fuel tank as in the prior art, thus improving the reliability of the sleeve body 2.

[0071] Furthermore, according to the slat rail sleeve 1 of this utility model, when the rail passage 8 and the drainage passage 9 are not connected and are formed separately, the strength of the wing structure beam 4 can be guaranteed.

[0072] Furthermore, according to the slat rail sleeve 1 of this utility model, when the rail passage 8 and the drainage passage 9 are connected and formed as one piece, the rail passage 8 and the drainage passage 9 can be easily formed on the wing structural beam 4.

[0073] Furthermore, according to the slat rail sleeve 1 of this utility model, since the drain outlet 11 is opened on the lower wing panel 10 located outside the fuel tank, it is not necessary to open the drain outlet on the lower wing panel located inside the fuel tank as in the prior art. Therefore, the reliability of the lower wing panel 10 can be improved.

[0074] Furthermore, according to the slat rail sleeve 1 of this utility model, the sleeve body 2 can be easily installed to the wing structural beam 4 using the flange 7.

[0075] (Modified example)

[0076] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above embodiments.

[0077] In the above embodiments, the cross-sectional shape of the slide rail receiving space 2a is approximately quadrilateral and the cross-sectional shape of the drainage cavity 2b is approximately triangular. However, the shapes of the slide rail receiving space 2a and the drainage cavity 2b are not limited to these. The shapes of the slide rail receiving space 2a and the drainage cavity 2b can be flexibly designed according to the structural space and drainage needs.

[0078] Although the structure and working principle of this utility model have been described above with reference to preferred embodiments, those skilled in the art should recognize that the above examples are merely illustrative and should not be construed as limiting the utility model. Therefore, modifications and variations can be made to this utility model within the spirit and scope of the claims, and all such modifications and variations will fall within the scope claimed by the claims of this utility model.

Claims

1. A slat rail sleeve for accommodating an aircraft slat rail, characterized in that, The slat rail sleeve includes: A sleeve body with an opening at one end; The wing structure beam for mounting the sleeve body; and A drain pipe, located on the side opposite to the sleeve body relative to the wing structural beam. The internal space of the sleeve body has: A slide rail receiving space for accommodating the slide rail and allowing it to move; and A drainage cavity is provided in the lower part of the slide rail receiving space. The drain pipe is connected to the drain cavity.

2. The slatted slide rail sleeve as described in claim 1, characterized in that, The drainage cavity is formed from one side of the opening along the lower part of the slide rail receiving space. The bottom of the drainage cavity has a lowest point, which, when the aircraft is parked or in level flight, is not higher than any other part of the internal space of the sleeve body except for the lowest point. The drain pipe is connected to the lowest part of the drain cavity.

3. The slatted slide rail sleeve as described in claim 1 or 2, characterized in that, When the slide rail accommodating space is cut along the height direction perpendicular to the length direction of the sleeve body, the cross-sectional shape of the slide rail accommodating space is approximately quadrilateral, and the cross-sectional shape of the drainage cavity is approximately triangular.

4. The slatted slide rail sleeve as described in claim 1 or 2, characterized in that, When the sleeve body is cut along its length, the slide rail receiving space extends in an arc shape along its length, and the lower wall of the drainage cavity is a straight line shape that slopes upward from the opening side.

5. The slatted slide rail sleeve as described in claim 1 or 2, characterized in that, A slide rail passage and a drainage passage are provided on the wing structural beam. The slide rail passage is connected to the slide rail receiving space, and the drainage passage connects the drainage pipe to the drainage cavity.

6. The slatted slide rail sleeve as described in claim 5, characterized in that, The slide rail passage and the drainage passage are not connected and are formed separately.

7. The slatted slide rail sleeve as described in claim 5, characterized in that, The slide rail passage and the drainage passage are connected to form a single unit.

8. The slatted slide rail sleeve as described in claim 5, characterized in that, One end of the drain pipe is connected to the drainage passage, and the other end of the drain pipe is connected to a drain outlet opened on the lower wall panel of the aircraft wing.

9. The slatted slide rail sleeve as described in claim 1 or 2, characterized in that, The sleeve body is connected to the wing structure beam via a flange disposed on the sleeve body.

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