Sleeve and manufacturing method thereof
阅读说明:本技术 套筒及其制造方法 (Sleeve and manufacturing method thereof ) 是由 彭国辉 李小军 徐培 周松官 朱森虎 薄晓莉 翁晨涛 于 2020-06-24 设计创作,主要内容包括:一种套筒(100),套筒(100)包括套筒壁(110),套筒壁(110)封围套筒内部空间,在套筒壁(110)上开有套筒开口(120),用于连通套筒内部空间和套筒(100)的外部,套筒壁(110)包括内层(111)、位于内层(111)径向外侧的外层(112)以及设置在内层(111)以及外层(112)之间的蜂窝结构,蜂窝结构包括多个蜂窝胞格(113)和多个胞格壁(114),多个蜂窝胞格(113)是通过胞格壁(114)彼此分隔的空间,胞格壁(114)在内层(111)与外层(112)之间沿倾斜于径向的方向延伸。本发明还涉及制造这种套筒的方法。本发明的套筒提高结构刚度的同时,大大减轻了结构重量,且增强了密封性。(A sleeve (100), the sleeve (100) comprises a sleeve wall (110), the sleeve wall (110) encloses a sleeve inner space, sleeve openings (120) are opened on the sleeve wall (110) for communicating the sleeve inner space with the outside of the sleeve (100), the sleeve wall (110) comprises an inner layer (111), an outer layer (112) located radially outside the inner layer (111), and a honeycomb structure arranged between the inner layer (111) and the outer layer (112), the honeycomb structure comprises 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 the cell walls (114), and the cell walls (114) extend in a direction inclined to the radial direction between the inner layer (111) and the outer layer (112). The invention also relates to a method of manufacturing such a sleeve. The sleeve provided by the invention has the advantages that the structural rigidity is improved, the structural weight is greatly reduced, and the sealing property is enhanced.)
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.
Technical Field
The invention belongs to the field of airplane structure design. In particular, the present invention relates to a sleeve and a method of manufacturing such a sleeve.
Background
Referring to fig. 7 and 8, the leading-edge slat of the aircraft is in fixed-axis rotation, and is supported on the leading-edge structure through the leading-
The mature industrial forming mode of the large-depth blind cavity part is welding forming and investment casting.
If welding forming is used as a forming mode, a large number of welding seams are easy to form corrosion sources, and fuel oil leakage is caused.
If investment casting is used as the forming mode, in order to prevent deformation and cracks during investment casting and casting, the minimum wall thickness of the casting is selected according to the minimum wall thickness requirement of investment precision casting. The overall weight of the sleeve cannot be cast into complex shapes subject to the constraints of the technological capability of casting and forming. Reducing the structural weight can only be undertaken from the part thickness.
However, the reduction of the structural wall thickness leads to lower rigidity of the cantilever type sleeve, and the cantilever type sleeve is easy to shake and deform and collide with the slide rail. Therefore, the sleeve formed by casting has consistent integral wall thickness, and the sleeve with integral rigidity is over strong in integral structure under the design working condition of smaller external load, the design margin is close to 20 times, and a very obvious weight reduction space is provided.
In view of the foregoing, it is desirable to improve the
Disclosure of Invention
The invention aims to design a sliding rail sleeve with a metal structure, which has three requirements of rigidity, weight and cost.
To this end, the invention provides a sleeve comprising a sleeve wall which encloses a sleeve interior space, in which sleeve openings are provided for communicating the sleeve interior space with the exterior of the sleeve,
it is characterized in that the preparation method is characterized in that,
the sleeve wall includes an inner layer, an outer layer located radially outward of 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 cell walls, the plurality of honeycomb cells being spaces separated from each other by cell walls, the cell walls extending in a direction oblique to the radial direction between the inner layer and the outer layer.
The sleeve provided by the invention avoids the restriction requirement of the manufacturing capability on a blind cavity type sleeve such as a sliding rail sleeve, greatly reduces the structural weight while improving the structural rigidity, and enhances the sealing property by additionally arranging a partition between an inner layer and an outer layer, thereby realizing the blind cavity oil tank boundary meeting the sealing integrity of wings.
In a preferred embodiment of the sleeve according to the invention, the honeycomb cells are rhomboidal in shape in a plane perpendicular to the radial direction.
The diamond shaped cells of the honeycomb are advantageous for increasing 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 is wherein the sleeve is a sliding rail sleeve of an aircraft leading edge slat.
The sleeve with high rigidity, light weight and good sealing performance is particularly suitable for airplanes, and is particularly suitable for a sliding rail for accommodating leading edge slats of the airplanes.
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 of curved sleeve walls, the welding and investment casting methods of the prior art are more difficult to apply or require the introduction of greater wall thickness and weight, and thus the sleeve construction of the present invention is particularly useful as a contoured sleeve with a curved surface to accommodate different requirements for sleeve shape.
A preferred embodiment of the sleeve according to the invention, wherein the sleeve extends in an arc in the length direction.
The sleeve extending along the arc is better able to adapt to the requirements of the movement of the aircraft leading-edge slat and places greater demands on manufacture, and therefore the sleeve structure of the invention is particularly suitable as a sleeve extending along the arc in the length direction to accommodate different requirements for the sleeve shape.
A preferred embodiment of the sleeve according to the invention, wherein a cross-sectional profile of the sleeve perpendicular to the length direction comprises a curve.
In order to maintain the uniformity of the distance between the inner and outer layers, the cell walls are also required to be curved accordingly, which puts higher demands on the manufacturing process, so that the sleeve structure of the invention is particularly suitable for sleeves comprising curves as a cross-sectional profile to accommodate different requirements for the sleeve shape.
A preferred embodiment of the sleeve according to the invention, wherein the arrangement density of the cell walls varies along the length of the sleeve.
Varying cell wall lay-out densities can minimize the weight of the sleeve wall while maintaining the stiffness requirements.
In a preferred embodiment of the sleeve according to the invention, a mounting flange is provided at the sleeve opening, and the cell walls are arranged with a density that increases from the mounting flange along the length of the sleeve.
Such a sleeve wall is particularly suitable for sleeve walls in the form of cantilever beams, in order to reduce the weight of the sleeve wall reasonably.
A preferred embodiment of the sleeve according to the invention, wherein the cross-section of each of said cells in a plane perpendicular to the length direction of said sleeve remains constant.
The honeycomb cells arranged in this way are simple in structure and complete in function, and are particularly favorable for
The invention also relates to a method of manufacturing a sleeve according to the preceding description,
it is characterized in that the preparation method is characterized in that,
the sleeve wall is formed by 3D printing.
The mode of using 3D printing to replace the investment casting or welding forming in the past can greatly reduce the structure weight. In addition, printing metal honeycombs within the structural sandwich can greatly enhance structural rigidity.
In conclusion, the sleeve disclosed by the invention optimizes the number and the positions of the cell walls of the honeycomb structure in the sleeve through reasonable rigidity analysis and layout, greatly reduces the structural weight under the condition of ensuring that the rigidity of the cantilever end meets the design requirement, saves the weight cost, optimizes the sealing property of the sleeve wall, and is particularly favorable for being used as a sliding rail sleeve of a leading edge slat of an airplane.
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 character of the claimed subject matter.
This document includes the accompanying drawings to provide a further understanding of various embodiments. The accompanying drawings are incorporated in and constitute a part of this specification. The drawings illustrate various embodiments described herein, and together with the description serve to explain the principles and operations of the claimed subject matter.
Drawings
Technical features of the present invention are hereinafter clearly described with reference to the above objects, and advantages thereof are apparent from the following detailed description with reference to the accompanying drawings, which illustrate by way of example preferred embodiments of the present invention, without limiting the scope of the invention.
In the drawings:
FIG. 1 is a schematic perspective view of a sleeve according to a preferred embodiment of the invention, with the outer layers of the sleeve walls removed to more clearly show the honeycomb structure;
FIG. 2 is a schematic perspective view from another angle of the sleeve shown in FIG. 1 according to a preferred embodiment of the invention, with the outer layers of the sleeve walls removed to more clearly show the honeycomb structure;
FIG. 3 is a perspective cross-sectional view of the sleeve shown in FIG. 1 according to a preferred embodiment of the invention, showing a honeycomb structure between the inner and outer layers of the sleeve wall;
FIG. 4 is a schematic perspective view of a sleeve according to another preferred embodiment of the invention with a portion of the outer layer of the sleeve wall being removed and another portion of the sleeve wall being perforated to more clearly show the honeycomb;
FIG. 5 is an enlarged view of FIG. 4 with a portion of the outer layer of the sleeve wall shown in a generally circular shape removed in accordance with the present invention;
FIG. 6 is an enlarged view of a portion of the sleeve wall shown in FIG. 4 having a generally circular shape and a portion perforated in accordance with the present invention;
FIG. 7 shows a schematic perspective view of a sleeve for a sliding track of an aircraft leading-edge slat, and shows the arrangement of the water drainage pipes; and
fig. 8 shows a schematic perspective cross-sectional view of the sleeve of the sliding track for an aircraft leading-edge slat shown in fig. 7.
List of reference numerals
10 front edge slide rail
20 front beam body
21 cabin-penetrating opening
30 drainage pipe
100 sleeve
110 sleeve wall
111 inner layer
112 outer layer
113 cellular lattice
114 cell wall
120 sleeve opening
121 mounting flange
130 drainage pipe interface
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings and described below.
While the invention will be described in conjunction with the exemplary embodiments, it will be understood that this description is not intended to limit the invention to those embodiments illustrated. On the contrary, the invention is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the invention.
For convenience in explanation and accurate definition of the technical solutions of the present invention, the terms "upper", "lower", "inner" and "outer" are used to describe features of the exemplary embodiments with reference to the positions of these features as shown in the drawings.
Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1 and 4, a
The
It will be appreciated by those skilled in the art that the interior space may take on various other shapes as desired, such as cylindrical, ellipsoidal, etc. Preferably, the
A sleeve opening 120 is opened in the
The
The
The material of
The honeycomb structure includes a plurality of
In the preferred embodiment as shown in fig. 1-3, the plurality of
In the preferred embodiment shown in fig. 4-6,
In order to provide more separation between the inner layer 111 and the outer layer 112, a plurality of
In a more preferred embodiment, as more clearly shown in FIG. 6, a plurality of
It is noted that although not shown in the drawings, a person skilled in the art can imagine that the embodiments shown in fig. 1-3 and the embodiments shown in fig. 4-6 can be combined with each other to arrive at further embodiments. Wherein the
In a preferred embodiment, the
Although the
Preferably, referring to fig. 4 and 7 for example, the
While the preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further 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 to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.
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