Corrugated plate bearing cylinder structure

Abstract

This invention belongs to the field of aerospace technology, specifically disclosing a corrugated plate load-bearing cylinder structure. The cylinder is constructed using corrugated plates, a skin, and annular fasteners. Due to the inherent thickness of the corrugated plates, the resulting cylinder possesses high bending stiffness, thus enabling it to bear significant loads. Furthermore, by fixing the inner wall of the skin to multiple outer ring protrusions of the corrugated plates to form the outer cylinder mounting surface, the connection between each outer ring protrusion of the corrugated plate and the skin is a planar structure. This results in the corrugated plates and skin forming multiple vertically arranged strip-like surfaces after installation, preventing localized instability. Compared to conventional cylindrical structures using rod structures or aluminum alloy skin stringer structures, this invention improves the structural efficiency of the cylindrical structure.

Description

Technical Field

[0001] This invention relates to the field of aerospace technology, and more specifically to a corrugated plate load-bearing cylinder structure. Background Technology

[0002] A rocket is a spacecraft propelled forward by the reaction force generated by the ejection of a working medium from a rocket engine. It carries all the propellant itself and does not rely on external working fluid to generate thrust. It can fly both inside and outside the dense atmosphere and is the vehicle for achieving spaceflight.

[0003] Cylindrical structures are a common structural form for load-bearing tubes in rockets, widely used in components such as fairings, interstage sections, interstage sections, and tail sections. Among these, rod structures and skin-stringer structures are frequently used. Specifically, rod structures consist of several intersecting straight rods, which can be made of metal or composite materials, and are suitable for cylindrical structures with low loads and short heights. Skin-stringer structures are constructed by riveting metal or composite skins, stringers, and ring frames, and are relatively inexpensive. However, rod structures are prone to stress concentration, and skin-stringer structures are prone to premature skin instability, resulting in low structural efficiency and structural imbalances in existing load-bearing tubes. Summary of the Invention

[0004] Therefore, the present invention provides a corrugated plate load-bearing cylinder structure to solve the problem of low structural efficiency of load-bearing cylinders in the prior art.

[0005] Specifically, the present invention provides a corrugated plate load-bearing cylinder structure, comprising:

[0006] A corrugated plate, the corrugated plate including multiple outer ring protrusions and multiple inner ring protrusions, the outer ring protrusions and the inner ring protrusions being periodically alternated, the outer surfaces of the multiple outer ring protrusions forming an outer cylinder mounting surface, and the outer surfaces of the multiple inner ring protrusions forming an inner cylinder mounting surface;

[0007] The inner wall surface of the skin is fixedly installed on the outer cylinder mounting surface;

[0008] An annular fastener, the outer wall surface of which is fixedly installed on the inner cylinder mounting surface;

[0009] The corrugated plate, the skin, and the annular fastener constitute the cylindrical body.

[0010] Optionally, the aforementioned corrugated plate load-bearing cylinder structure further includes:

[0011] The upper frame includes a first abutting surface, a second abutting surface, and a third abutting surface. The first abutting surface is used to abut against one end face of the cylinder arranged along its axial direction. The first abutting surface is a circular ring structure. The second abutting surface and the third abutting surface are both arranged perpendicular to the first abutting surface. The second abutting surface and the third abutting surface are respectively arranged on the inner and outer circular sides of the first abutting surface along the radial direction of the first abutting surface. The second abutting surface is fixedly installed on the inner cylinder mounting surface, and the third abutting surface is fixedly installed on the outer wall surface of the skin.

[0012] Optionally, the above-mentioned corrugated plate load-bearing cylinder structure,

[0013] The bottom of the third contact surface is serrated.

[0014] Optionally, the above-mentioned corrugated plate load-bearing cylinder structure,

[0015] The third contact surface is riveted, welded, or bonded to the skin.

[0016] Optionally, the aforementioned corrugated plate load-bearing cylinder structure further includes:

[0017] The lower end frame includes a fourth abutment surface, a fifth abutment surface, and a sixth abutment surface. The fifth abutment surface is used to abut against another end face of the cylinder arranged along its axial direction. The fourth abutment surface is a ring structure. The fifth abutment surface and the sixth abutment surface are both arranged perpendicular to the fourth abutment surface and are respectively arranged on the inner and outer circular sides of the fourth abutment surface along the radial direction of the fourth abutment surface. The fifth abutment surface is fixedly installed on the inner cylinder mounting surface, and the sixth abutment surface is fixedly installed on the outer wall surface of the skin.

[0018] Optionally, the above-mentioned corrugated plate load-bearing cylinder structure,

[0019] The top of the sixth contact surface is serrated.

[0020] Optionally, the above-mentioned corrugated plate load-bearing cylinder structure,

[0021] The sixth contact surface is riveted, welded, or bonded to the skin.

[0022] Optionally, the above-mentioned corrugated plate load-bearing cylinder structure,

[0023] The cylinder has one, two, or more components;

[0024] When there are two or more cylinders, the corrugated plate load-bearing cylinder structure further includes at least one overlapping frame, any one of the overlapping frames is located at the stacking of two adjacent cylinders, and any one of the overlapping frames is used to fix the two adjacent cylinders.

[0025] Optionally, the above-mentioned corrugated plate load-bearing cylinder structure,

[0026] The overlapping frame includes an outer frame and an inner frame. The outer frame is attached to the outer wall surface of the skin. The two sides of the outer frame, which are arranged along the axial direction of the cylinder, are fixedly connected to the skin of the two cylinders respectively. The two sides of the inner frame, which are arranged along the axial direction of the cylinder, are fixed to the inner cylinder mounting surfaces of the two cylinders respectively.

[0027] Optionally, the above-mentioned corrugated plate load-bearing cylinder structure,

[0028] The outer frame has a first edge and / or a second edge that are arranged along the axial direction of the cylinder in a ring-shaped sawtooth pattern.

[0029] The technical solution provided by this invention has the following advantages:

[0030] 1. The corrugated plate load-bearing cylinder structure provided by the present invention includes a corrugated plate, a skin, and an annular fastener. The corrugated plate includes multiple outer ring protrusions and multiple inner ring protrusions, which are periodically alternated. The outer surfaces of the multiple outer ring protrusions form an outer cylinder mounting surface, and the outer surfaces of the multiple inner ring protrusions form an inner cylinder mounting surface. The inner wall surface of the skin is fixedly installed on the outer cylinder mounting surface. The outer wall surface of the annular fastener is fixedly installed on the inner cylinder mounting surface. The corrugated plate, the skin, and the annular fastener constitute a cylinder body.

[0031] This corrugated plate load-bearing cylinder structure uses corrugated plates, skin, and annular fasteners to form the cylinder body. Due to the inherent thickness of the corrugated plates, the resulting cylinder body possesses high bending stiffness, thus enabling it to bear significant loads. Furthermore, by fixing the inner wall of the skin to the outer surface of multiple outer ring protrusions forming the outer cylinder mounting surface, the connection between each outer ring protrusion of the corrugated plate and the skin is a planar structure. This results in multiple vertically arranged strip-shaped contact surfaces between the corrugated plate and the skin after installation, preventing localized instability. Compared to conventional cylindrical structures using rod structures or aluminum alloy skin stringer structures, this design significantly improves the structural efficiency of the cylindrical structure.

[0032] 2. The corrugated plate load-bearing cylinder structure provided by the present invention, by making the bottom of the third abutment surface, the top of the sixth abutment surface, and the first edge and / or the second edge of the outer frame arranged along the axial direction of the cylinder body in an annular sawtooth shape, can prevent stress concentration from occurring in the installed cylinder structure, thereby preventing the cylinder structure from yielding before instability.

[0033] 3. The corrugated plate load-bearing cylinder structure provided by the present invention facilitates automated processing during production and reduces manufacturing costs by riveting, welding or bonding the third abutment surface to the skin and riveting, welding or bonding the sixth abutment surface to the skin. Attached Figure Description

[0034] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the corrugated plate load-bearing cylinder structure provided in Embodiment 1 of the present invention;

[0036] Figure 2 This is a partial structural diagram of the corrugated plate load-bearing cylinder structure provided in Embodiment 1 of the present invention;

[0037] Figure 3 This is a schematic diagram of the corrugated plate structure in the corrugated plate load-bearing cylinder structure provided in Embodiment 1 of the present invention;

[0038] Explanation of reference numerals in the attached figures:

[0039] 1-Corrugated plate; 101-Outer ring protrusion; 102-Inner ring protrusion;

[0040] 2-Skin;

[0041] 3- Circular fastener;

[0042] 4-Upper frame; 401-First abutting surface; 402-Second abutting surface; 403-Third abutting surface;

[0043] 5-Lower frame; 501-Sixth abutment surface;

[0044] 6-Overlapping frame; 601-Outer frame; 602-Inner frame. Detailed Implementation

[0045] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0049] Example 1

[0050] This embodiment provides a corrugated plate load-bearing cylinder structure, such as Figures 1 to 3 As shown, the device includes a corrugated plate 1, a skin 2, and an annular fastener 3. The corrugated plate 1 includes multiple outer ring protrusions 101 and multiple inner ring protrusions 102. The outer ring protrusions 101 and inner ring protrusions 102 are periodically alternated. The outer surfaces of the multiple outer ring protrusions 101 form an outer cylinder mounting surface, and the outer surfaces of the multiple inner ring protrusions 102 form an inner cylinder mounting surface. The inner wall surface of the skin 2 is fixedly installed on the outer cylinder mounting surface. The outer wall surface of the annular fastener 3 is fixedly installed on the inner cylinder mounting surface. The corrugated plate 1, the skin 2, and the annular fastener 3 constitute the cylinder body.

[0051] The corrugated plate load-bearing cylinder structure provided in the above embodiments uses a corrugated plate 1, a skin 2, and annular fasteners 3 to form the cylinder body. Because the corrugated plate 1 itself has a certain thickness, the resulting cylinder body has high bending stiffness, thus giving it high load-bearing capacity. Furthermore, by fixing the inner wall surface of the skin 2 to the outer cylinder mounting surface formed by multiple outer ring protrusions 101, the connection between each outer ring protrusion 101 of the corrugated plate 1 and the skin 2 is a planar structure. This results in multiple vertically arranged strip-shaped contact surfaces between the corrugated plate 1 and the skin 2 after installation, preventing local instability. Compared to conventional cylindrical structures using rod structures or aluminum alloy skin 2 stringer structures, this structure improves structural efficiency.

[0052] It should be noted that in the above embodiments, the outer ring protrusion 101 and the inner ring protrusion 102 of the corrugated plate 1 are arranged in opposite directions.

[0053] It should be noted that in the above embodiments, one or more of the components, such as the skin 2, the corrugated plate 1, and the annular fastener 3, are made of sheet metal or composite material sheets. For example, the skin 2 and the corrugated plate 1 are both made of sheet metal, such as aluminum, with a thickness of 1 mm, and the annular fastener 3 is made of sheet metal, such as aluminum, with a thickness of 3 mm, thus enabling the cylindrical structure to achieve lightweight and high strength. Of course, in other alternative embodiments, the sheet metal can be replaced with composite materials, such as resin-based carbon fiber reinforced composite panels, which have lower density, higher strength, and can achieve lower weight.

[0054] like Figures 1 to 3 As shown, the corrugated plate load-bearing cylinder structure provided in this embodiment also includes an upper frame 4. The upper frame 4 includes a first abutting surface 401, a second abutting surface 402, and a third abutting surface 403. The first abutting surface 401 is used to abut against one end face of the cylinder body arranged along its axial direction. The first abutting surface 401 is a ring structure. The second abutting surface 402 and the third abutting surface 403 are both arranged perpendicular to the first abutting surface 401. The second abutting surface 402 and the third abutting surface 403 are respectively arranged on the inner and outer circular sides of the first abutting surface 401 along the radial direction of the first abutting surface 401. The second abutting surface 402 is fixedly installed on the inner cylinder mounting surface, and the third abutting surface 403 is fixedly installed on the outer wall surface of the skin 2.

[0055] It can be noted that, in this embodiment, the bottom of the third abutment surface 403 is made into annular serrations. Specifically, the serrations are set at the contact point between the outer wall surface of the skin 2 and the outer ring protrusion 101.

[0056] Furthermore, in the corrugated plate load-bearing cylinder structure provided in this embodiment, the third contact surface 403 is riveted, welded, or bonded to the skin 2.

[0057] like Figures 1 to 3 As shown, the corrugated plate load-bearing cylinder structure provided in this embodiment also includes a lower end frame 5. The lower end frame 5 includes a fourth abutment surface, a fifth abutment surface, and a sixth abutment surface 501. The fifth abutment surface is used to abut against another end face of the cylinder body arranged along its axial direction. The fourth abutment surface is a ring structure. The fifth abutment surface and the sixth abutment surface 501 are both arranged perpendicular to the fourth abutment surface. The fifth abutment surface and the sixth abutment surface 501 are respectively arranged on the inner circle side and the outer circle side of the fourth abutment surface along the radial direction of the fourth abutment surface. The fifth abutment surface is fixedly installed on the inner cylinder mounting surface, and the sixth abutment surface 501 is fixedly installed on the outer wall surface of the skin 2.

[0058] It can be noted that, in this embodiment, the top of the sixth abutment surface 501 is in the shape of annular serrations. Specifically, the serrations are set at the contact point between the outer wall surface of the skin 2 and the outer ring protrusion 101.

[0059] Furthermore, in the corrugated plate load-bearing cylinder structure provided in this embodiment, the sixth contact surface 501 is riveted, welded, or bonded to the skin 2.

[0060] Specifically, such as Figures 1 to 3 As shown in the figure, the corrugated plate load-bearing cylinder structure provided in this embodiment has one, two, or more cylinders. When one cylinder meets the usage requirements, only one cylinder is needed; when the height of one cylinder does not meet the usage requirements, i.e., when the required height of the load-bearing cylinder is large, two or more cylinders are stacked and overlapped, with an overlap frame between the two cylinders. Specifically, the corrugated plate load-bearing cylinder structure also includes at least one overlap frame 6, with any overlap frame 6 located at the stacking point of two adjacent cylinders, and any overlap frame 6 used to fix the two adjacent cylinders.

[0061] It can be noted that, in this embodiment, the overlapping frame 6 includes an outer frame 601 and an inner frame 602. The outer frame 601 is attached to the outer wall surface of the skin 2. The two sides of the outer frame 601 arranged along the axial direction of the cylinder are respectively fixedly connected to the skin 2 of the two cylinders. The two sides of the inner frame 602 arranged along the axial direction of the cylinder are respectively fixed to the inner cylinder mounting surface of the two cylinders.

[0062] Furthermore, in the corrugated plate load-bearing cylinder structure provided in this embodiment, the first edge and / or the second edge of the outer frame 601 along the axial direction of the cylinder are arranged in annular sawtooth shape. In addition, each sawtooth needs to be installed corresponding to the outer ring protrusion 101. For example, the sawtooth is set at the contact point between the outer wall surface of the skin 2 and the outer ring protrusion 101, and the sawtooth is attached to the skin 2 and then riveted, glued or welded.

[0063] The corrugated plate load-bearing cylinder structure provided in the above embodiments, by making the bottom of the third abutment surface, the top of the sixth abutment surface, and the first edge and / or the second edge of the outer frame along the axial direction of the cylinder a ring sawtooth structure, can prevent stress concentration from occurring in the installed cylinder structure, thereby preventing the cylinder structure from yielding before instability.

[0064] The corrugated plate load-bearing cylinder structure provided in the above embodiments facilitates automated processing during production and reduces manufacturing costs by riveting, welding or bonding the third abutment surface 403 to the skin 2 and the sixth abutment surface 501 to the skin 2.

[0065] In the corrugated plate load-bearing cylinder structure provided in the above embodiments, during installation, the corrugated plate 1, skin 2 and annular fastener 3 of any cylinder segment are first fixed. The fixing point is selected from riveting, spot welding or bonding, depending on the actual material selection. For example, when the corrugated plate 1, skin 2 and annular fastener 3 are all made of aluminum plates, riveting or spot welding can be selected. Then, an overlap frame 6 is set between the cylinder segment and the adjacent cylinder segment for overlap, and welding or spot welding is performed at the outer frame 601 and the inner frame 602.

[0066] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A corrugated panel staved cylinder structure, characterized by, include: The corrugated plate (1) includes multiple outer ring protrusions (101) and multiple inner ring protrusions (102). The outer ring protrusions (101) and the inner ring protrusions (102) are periodically alternated. The outer surface of the multiple outer ring protrusions (101) forms an outer cylinder mounting surface, and the outer surface of the multiple inner ring protrusions (102) forms an inner cylinder mounting surface. Skin (2), the inner wall surface of which is fixedly installed on the outer cylinder mounting surface; An annular fastener (3) is fixedly installed on the outer wall surface of the annular fastener (3) on the inner cylinder mounting surface; The corrugated plate (1), the skin (2), and the annular fastener (3) constitute the cylindrical body; Corrugated plate load-bearing cylinder structures also include: The upper frame (4) includes a first abutting surface (401), a second abutting surface (402), and a third abutting surface (403). The first abutting surface (401) is used to abut against one end face of the cylinder along its axial direction. The first abutting surface (401) is a ring structure. The second abutting surface (402) and the third abutting surface (403) are both arranged perpendicular to the first abutting surface (401). The second abutting surface (402) and the third abutting surface (403) are respectively arranged on the inner and outer circular sides of the first abutting surface (401) along the radial direction of the first abutting surface (401). The second abutting surface (402) is fixedly installed on the inner cylinder mounting surface. The third abutting surface (403) is fixedly installed on the outer wall surface of the skin (2). The bottom of the third abutting surface (403) is annularly serrated. The lower end frame (5) includes a fourth abutment surface, a fifth abutment surface and a sixth abutment surface (501). The fifth abutment surface is used to abut against another end face of the cylinder arranged along its axial direction. The fourth abutment surface is a ring structure. The fifth abutment surface and the sixth abutment surface (501) are both arranged perpendicular to the fourth abutment surface. The fifth abutment surface and the sixth abutment surface (501) are respectively arranged on the inner circle side and the outer circle side of the fourth abutment surface along the radial direction of the fourth abutment surface. The fifth abutment surface is fixedly installed on the inner cylinder mounting surface. The sixth abutment surface (501) is fixedly installed on the outer wall surface of the skin (2). The top of the sixth abutment surface (501) is annular sawtooth.

2. The corrugated plate load-bearing cylinder structure according to claim 1, characterized in that, The third contact surface (403) is riveted, welded or bonded to the skin (2).

3. The corrugated plate load-bearing cylinder structure according to claim 1, characterized in that, The sixth abutment surface (501) is riveted, welded or bonded to the skin (2).

4. The corrugated plate load-bearing cylinder structure according to claim 1, characterized in that, The cylinder has one, two, or more components; When there are two or more cylinders, the corrugated plate load-bearing cylinder structure further includes at least one overlapping frame (6), any one of the overlapping frames (6) is located at the stacking of two adjacent cylinders, and any one of the overlapping frames (6) is used to fix two adjacent cylinders.

5. The corrugated plate load-bearing cylinder structure according to claim 4, characterized in that, The overlapping frame (6) includes an outer frame (601) and an inner frame (602). The outer frame (601) is attached to the outer wall of the skin (2). The two sides of the outer frame (601) along the axial direction of the cylinder are fixedly connected to the skin (2) of the two cylinders respectively. The two sides of the inner frame (602) along the axial direction of the cylinder are fixed to the inner cylinder mounting surface of the two cylinders respectively.

6. The corrugated plate load-bearing cylinder structure according to claim 5, characterized in that, The outer frame (601) has a first edge and / or a second edge that are arranged along the axial direction of the cylinder in an annular serrated shape.

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