CN111703567A - Sleeve and method of making the same - Google Patents

Abstract

A sleeve (100), the sleeve (100) comprises a sleeve wall (110), the sleeve wall (110) encloses an inner space of the sleeve, and a sleeve opening (120) is formed on the sleeve wall (110) , used to communicate the inner space of the sleeve and the outside of the sleeve (100), the sleeve wall (110) includes an inner layer (111), an outer layer (112) located radially outside of the inner layer (111), and an outer layer (112) disposed on the inner layer (111) and the honeycomb structure between the outer layers (112), the honeycomb structure includes a plurality of honeycomb cells (113) and a plurality of cell walls (114), and the plurality of honeycomb cells (113) are formed through the cell walls ( 114) Spaces separated from each other, the cell walls (114) extend between the inner layer (111) and the outer layer (112) in a direction inclined to the radial direction. The invention also relates to a method of manufacturing such a sleeve. The sleeve of the present invention greatly reduces the structural weight while improving the structural rigidity, and enhances the sealing performance.

Description

Sleeve and method of making the same

technical field

The invention belongs to the field of aircraft structure design. In particular, the present invention relates to a sleeve and a method of making such a sleeve.

Background technique

Referring to Figures 7 and 8, the leading edge slat of the aircraft is a fixed-axis rotational movement, supported on the leading edge structure by the leading edge slide rail 10, and the retractable passage passes through the front beam body 20, then the front beam body 20 must be matched The movement track of the slide rail is reserved for the piercing hole 21 . On the sliding rail retractable passage, a sleeve 100 must be designed to block the sealing gap of the fuel tank caused by the sliding rail penetration.

For parts with large depth and blind cavity, the mature industrial forming methods are welding forming and investment casting.

If welding forming is used as the forming method, a large number of welds will easily form corrosion sources, resulting in fuel leakage.

If investment casting is used as the forming method, in order to prevent deformation and cracks during investment and casting, the minimum wall thickness of the casting should be selected according to the minimum wall thickness requirements of investment casting. Constrained by the technological capabilities of casting, the overall weight of the sleeve cannot cast complex shapes. Reducing structural weight can only start with part thickness.

But blindly reducing the wall thickness of the structure will result in a slightly smaller rigidity of the cantilever sleeve, which is prone to shaking deformation and collision with the slide rail. Therefore, the casted sleeve has the same overall wall thickness, while the sleeve that retains the overall rigidity has a very strong overall structure under the design condition of small external load, the design margin is close to 20 times, and there is a very obvious weight reduction space.

To sum up, it is necessary to improve the sleeve 100, especially the sleeve wall thereof, so as to meet the requirements of the sleeve in actual production.

SUMMARY OF THE INVENTION

The purpose of the present invention is to design a sliding rail sleeve with a metal structure that takes into account the three requirements of rigidity, weight and cost.

To this end, the present invention provides a sleeve, the sleeve includes a sleeve wall, the sleeve wall encloses the inner space of the sleeve, and a sleeve opening is opened on the sleeve wall for communicating with the sleeve the space inside the sleeve and the outside of the sleeve,

It is characterized in that,

The sleeve wall includes an inner layer, an outer layer radially outside the inner layer, and a honeycomb structure disposed between the inner layer and the outer layer, the honeycomb structure including a plurality of honeycomb cells and a plurality of The plurality of honeycomb cells are spaces separated from each other by cell walls extending in a direction inclined to the radial direction between the inner layer and the outer layer.

The sleeve of the present invention avoids the requirement that blind cavity sleeves such as slide rail sleeves are restricted by the manufacturing capacity, greatly reduces the structural weight while improving the structural rigidity. The sealing is enhanced by adding a partition between them, thereby achieving a blind cavity fuel tank boundary that meets the sealing integrity of the wing.

A preferred embodiment of the sleeve according to the present invention, wherein the honeycomb cells are in the shape of a rhombus on a plane perpendicular to the radial direction.

The rhombus-shaped honeycomb cells are beneficial to increase the structural rigidity of the sleeve while further reducing the structural weight of the sleeve.

A preferred embodiment of the sleeve according to the invention, wherein the sleeve is a sliding rail sleeve of an aircraft slat.

The sleeves with high rigidity, light weight and good sealing performance are especially suitable for use in aircrafts, especially for sliding rails accommodating aircraft leading edge slats.

A preferred embodiment of the sleeve according to the invention, wherein at least a part of the sleeve wall of the sleeve is curved.

In the case where the sleeve wall is curved, the welding and investment casting methods in the prior art will be more difficult to apply or need to introduce larger wall thickness and weight, so the sleeve structure of the present invention is especially suitable for use as a sleeve with a curved surface. The special-shaped sleeve to adapt to the different needs of the sleeve shape.

A preferred embodiment of the sleeve according to the present invention, wherein the sleeve extends in an arc in the length direction.

The sleeve extending along the arc can be better adapted to the motion requirements of the leading edge slat of the aircraft, and it puts forward higher requirements for manufacturing, so the sleeve structure of the present invention is especially suitable for use as an arc along the length direction. Extended sleeves to accommodate different needs for sleeve shapes.

A preferred embodiment of the sleeve according to the invention, wherein the cross-sectional profile of the sleeve perpendicular to the length direction comprises a curve.

At this time, in order to maintain the uniformity of the distance between the inner layer and the outer layer, the cell wall also needs to be correspondingly curved, which puts forward higher requirements for manufacturing and processing. Therefore, the sleeve structure of the present invention is especially suitable for Sleeves containing curves as cross-sectional profiles to accommodate different requirements for sleeve shapes.

A preferred embodiment of the sleeve according to the present invention, wherein the arrangement density of the cell walls varies along the length of the sleeve.

The variable cell wall density can reduce the weight of the sleeve wall as much as possible while maintaining the required rigidity.

According to a preferred embodiment of the sleeve of the present invention, a mounting flange is provided at the opening of the sleeve, and the arrangement density of the cell walls gradually increases from the mounting flange along the length direction of the sleeve. big.

Such a sleeve wall is particularly suitable for a sleeve wall in the form of a cantilever beam in order to reduce the weight of the sleeve wall reasonably.

A preferred embodiment of the sleeve according to the present invention, wherein the cross-section of each of the honeycomb cells in a plane perpendicular to the length of the sleeve remains unchanged.

The honeycomb cell structure set in this way is simple and complete in function, which is especially beneficial to

The invention also relates to a method of manufacturing a sleeve according to the aforementioned,

It is characterized in that,

The sleeve wall is formed by 3D printing.

Using 3D printing to replace the past investment casting or welding can greatly reduce the weight of the structure. Furthermore, printing metal honeycombs within structural interlayers can greatly enhance structural rigidity.

In summary, the sleeve of the present invention optimizes the number and position of the cell walls of the honeycomb structure in the sleeve through reasonable stiffness analysis and layout, and greatly reduces the structural weight while ensuring that the rigidity of the cantilever end meets the design requirements. , the weight cost is saved, and the sealing performance of the sleeve wall is optimized, which is especially beneficial to be used as an aircraft leading edge slat slide rail sleeve.

It is to be understood that both the foregoing general description and the following detailed description illustrate various embodiments and are intended to provide an overview or framework for understanding the nature and characteristics of the claimed subject matter.

This document includes figures to provide a further understanding of the various embodiments. The accompanying drawings are incorporated into and constitute a part of this specification. The drawings illustrate various embodiments described herein, and together with the written description serve to explain the principles and operations of the claimed subject matter.

Description of drawings

With reference to the above objects, the technical features of the present invention are hereinafter clearly described, and the advantages thereof are apparent from the following detailed description with reference to the accompanying drawings, which illustrate preferred embodiments of the present invention by way of example and not limit the scope of the present invention. scope.

In the attached picture:

Figure 1 is a schematic perspective view of a sleeve according to a preferred embodiment of the present invention, wherein the outer layer of the sleeve wall has been removed in order to show the honeycomb structure more clearly;

Figure 2 is a schematic perspective view from another angle of the sleeve according to the preferred embodiment of the present invention shown in Figure 1 with the outer layers of the sleeve walls removed in order to show the honeycomb structure more clearly;

3 is a perspective cross-sectional view of the sleeve according to the preferred embodiment of the present invention shown in FIG. 1, showing the honeycomb structure between the inner and outer layers of the sleeve wall;

4 is a schematic perspective view of a sleeve according to another preferred embodiment of the present invention, wherein a substantially circular portion of the outer layer of the sleeve wall is removed and another substantially circular portion of the sleeve wall is penetrated , to show the honeycomb structure more clearly;

FIG. 5 is an enlarged view of the portion of the generally circular portion of the outer layer of the sleeve wall shown in FIG. 4 that has been removed in accordance with the present invention;

FIG. 6 is an enlarged view of a portion of the substantially circular portion of the sleeve wall shown in FIG. 4 being penetrated according to the present invention;

Figure 7 shows a schematic perspective view of a sleeve for a slide rail of an aircraft slat, and shows the arrangement of the drain; and

FIG. 8 shows a schematic perspective cross-sectional view of the sleeve shown in FIG. 7 for the slide rail of an aircraft slat.

List of reference signs

10 Leading edge slides

20 Front beam body

21 through the cabin opening

30 drain pipe

100 sleeves

110 sleeve wall

111 inner layer

112 outer layer

113 honeycomb cells

114 cell wall

120 sleeve opening

121 Mounting Flange

130 drain pipe interface

Detailed ways

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings and described hereinafter.

While the invention will be described in conjunction with exemplary embodiments, it will be appreciated that this description is not intended to limit the invention to those exemplified embodiments. On the contrary, the invention is intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents, and other embodiments, which may be included within the spirit and scope of the invention.

For the convenience of explanation and precise definition of the technical solutions of the present invention, the terms "upper", "lower", "inner" and "outer" are used to refer to the positions of the features of the exemplary embodiments shown in the accompanying drawings to refer to these features describe.

Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to Figures 1 and 4, a sleeve 100 according to a preferred embodiment of the present invention is shown.

Sleeve 100 includes sleeve wall 110 . The sleeve wall 110 encloses the interior space of the sleeve 100 . This interior space may be used, for example, to accommodate a slat of an aircraft, in which case the sleeve 100 is a rail sleeve of the slat of the aircraft. In this case, the inner space may be a substantially arc-shaped cylinder, that is, the sleeve 100 extends in an arc-shaped lengthwise direction. And the sleeve 100 may have a substantially rectangular cross-section.

However, those skilled in the art can understand that the inner space can also adopt various other shapes according to actual needs, such as cylindrical shape, ellipsoid shape and so on. Preferably, the sleeve wall 110 has a rounded outer contour, that is, the cross-sectional contour of the sleeve 100 perpendicular to the length direction contains a curve. Preferably, at least a portion of the sleeve wall 110 of the sleeve 100 is curved. As in the orientation in Figure 1, the upper and lower wall portions of the sleeve 100 are curved.

A sleeve opening 120 is opened on the sleeve wall 110 for communicating the inner space of the sleeve and the outside of the sleeve 100 . Preferably, the opening 120 may be opened at one end of the sleeve 100 and have the shape of the cross-section of the sleeve 100 there. However, the opening 120 may also have a specific shape set according to actual needs, for example, a part of the cross-sectional shape at the end, that is, smaller than the cross-section at the end. In addition, the opening 120 may also be opened at other positions where the sleeve 100 communicates with the outside, and the opening 120 may have other suitable shapes. Generally, the opening 120 can be of the same or similar shape as the hatch opening 21 on the front beam body 20 as such.

The sleeve wall 110 includes an inner layer 111 , an outer layer 112 located radially outside the inner layer 111 , and a honeycomb structure disposed between the inner layer 111 and the outer layer 112 . It is pointed out that radial direction in this context refers to the direction perpendicular to the tangent plane at each point of the object surface concerned.

The sleeve wall 110 is preferably manufactured by 3D printing.

The material of the sleeve wall 110 may include various composite and metallic materials common in the art or a combination of both. Composite materials and carbon fiber layups can also be used to form. When a metal material is selected as the material of the sleeve wall 110 , suitable structural rigidity and sealing properties can be obtained with a small volume, and it is easy to form by 3D printing.

The honeycomb structure includes a plurality of honeycomb cells 113 and a plurality of cell walls 114 . The plurality of honeycomb cells 113 are spaces separated from each other by cell walls 114 .

In the preferred embodiment shown in Figures 1-3, the plurality of cell walls 114 intersect with each other such that the honeycomb cells 113 have a diamond shape on a plane perpendicular to the radial direction. When each cell wall 114 extends radially between the inner layer 111 and the outer layer 112 , each honeycomb cell 113 is in the shape of a flat column.

In the preferred embodiment shown in FIGS. 4-6 , the cell walls 114 extend between the inner layer 111 and the outer layer 112 in a direction that is oblique to the radial direction. In a preferred embodiment, the cross-section of each honeycomb cell 113 on a plane perpendicular to the length direction of the sleeve 100 may remain unchanged, that is, each honeycomb cell 113 has a substantially straight or curved cylindrical shape. In other words, at the cell wall 114 , the inner layer 111 and the outer layer 112 are separated by at least one layer of the cell wall 114 .

In order to provide more partitions between the inner layer 111 and the outer layer 112 , multiple groups of cell walls 114 inclined relative to the radial direction can also be arranged therebetween.

In a more preferred embodiment, as shown more clearly in FIG. 6 , a plurality of cell walls 114 inclined with respect to the radial direction meet each other alternately at the inner layer 111 and at the outer layer 112 to fill the The entire space between the inner layer 111 and the outer layer 112 is filled, so as to ensure that the space between the inner layer 111 and the outer layer 112 is completely blocked by the cell wall 114 .

It is pointed out that although not shown in the drawings, those skilled in the art can imagine that the embodiments shown in FIGS. 1-3 and the embodiments shown in FIGS. 4-6 can be combined with each other to obtain additional Example. The cell walls 114 not only intersect at the inner layer 111 and the outer layer 112 , but also intersect each other between the inner layer 111 and the outer layer 112 , and define a special-shaped honeycomb cell 113 .

In a preferred embodiment, the arrangement density of the cell walls 114 varies along the length of the sleeve 100 . For example, a mounting flange (flange) 121 may be provided at the sleeve opening 120 , and the arrangement density of the cell walls 114 gradually increases from the mounting flange 121 along the length direction of the sleeve 100 . Wherein, the mounting flange 121 can be used for butt joint with the front beam body 20 as described above at the cabin hole 21 .

Although the above and the illustrated cell walls 114 are generally in the shape of a flat sheet, the cell walls 114 can also be provided in other shapes, such as curved surfaces, etc. according to actual needs. In addition, some or all of the cell walls 114 may also include relatively thick wall thicknesses according to actual needs, for example, a distance much larger than the distance between the inner layer 111 and the outer layer 112 .

Preferably, see eg FIGS. 4 and 7 , the sleeve 100 may further include a drain port 130 . A drain port 130 is provided at the end of the sleeve 100, preferably opposite the sleeve opening 120, for connection with the drain 30 (see Figure 7). The drain interface 130 may take the form of a threaded hole as shown in FIG. 4 . The drain port 130 can be used to drain the water accumulated in the inner space of the sleeve 100 , so the drain port 130 can preferably be provided at a lower position of the sleeve 100 .

The preferred embodiments of the present invention have been described in detail above, but it is to be understood that aspects of the embodiments can be modified, if desired, to employ aspects, features and concepts of various patents, applications and publications to provide additional embodiments.

These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed as limiting to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments, along with all equivalents to which these claims are entitled scope.

Claims (10)

1. A sleeve (100), the sleeve (100) comprising a sleeve wall (110), the sleeve wall (110) enclosing a sleeve interior space, a sleeve opening (120) being opened in the sleeve wall (110) for communicating the sleeve interior space with an exterior of the sleeve (100),

it is characterized in that the preparation method is characterized in that,

the sleeve wall (110) comprises an inner layer (111), an outer layer (112) located radially outside the inner layer (111), and a honeycomb structure disposed between the inner layer (111) and the outer layer (112), the honeycomb structure comprising a plurality of honeycomb cells (113) and a plurality of cell walls (114), the plurality of honeycomb cells (113) being spaces separated from each other by cell walls (114), the cell walls (114) extending in a direction oblique to the radial direction between the inner layer (111) and the outer layer (112).

2. The sleeve (100) of claim 1,

the honeycomb cells (113) are in the shape of a rhombus on a plane perpendicular to the radial direction.

3. The sleeve (100) of claim 1,

the sleeve (100) is a sliding track sleeve for an aircraft leading-edge slat.

4. The sleeve (100) of claim 1,

at least a portion of the sleeve wall (110) of the sleeve (100) is curved.

5. The sleeve (100) of claim 4,

the sleeve (100) extends in an arc shape in a length direction.

6. The sleeve (100) of claim 4,

the cross-sectional profile of the sleeve (100) perpendicular to the length direction comprises a curve.

7. The sleeve (100) of claim 1,

the cell walls (114) have a distribution density that varies along the length of the sleeve (100).

8. The sleeve (100) of claim 7,

the sleeve opening (120) is provided with a mounting flange (121), and the arrangement density of the cell walls (114) is gradually increased from the mounting flange (121) along the length direction of the sleeve (100).

9. The sleeve (100) of claim 7,

the cross-section of each cell (113) in a plane perpendicular to the length direction of the sleeve (100) remains constant.

10. A method of manufacturing a sleeve (100) according to any one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

the sleeve wall (110) is formed by 3D printing.

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