A cabin shell structure

Abstract

A cabin shell structure includes a front end frame, a rear end frame, a skin and a plurality of separation cylinders, wherein the front end frame and the rear end frame are provided with a front receiving portion and a rear receiving portion on opposite sides thereof, and the two sides of the skin are connected to the front receiving portion and the rear receiving portion respectively, and the plurality of separation cylinders are arranged circumferentially between the front end frame and the rear end frame, wherein one end of the separation cylinder is connected to the front end frame and the other end is connected to the rear end frame, and the side of the separation cylinder is provided with a support portion connected to the inner side of the skin. The above scheme realizes a stable connection between the skin and the front end frame by providing the front receiving portion and the rear end frame, effectively simplifies the overall structure and reduces the processing cost; at the same time, by directly connecting the separation cylinder between the front end frame and the rear end frame, and making the side of the separation cylinder abut against the inner side of the skin, the skin is supported. The processing and forming efficiency of each component of the cabin shell structure of the above scheme is high, the processability is good, and the processing cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of spacecraft structures, and in particular to a cabin shell structure. Background Art

[0002] The requirements for the shell structure of spacecraft are relatively high. In order to ensure the overall bearing strength of the shell structure, the shell structure often adopts the form of grid rib integral molding or stringer bearing riveting. The grid rib integral molding method refers to the local fine processing of the raw materials after casting. The shell wall thickness of this molding method is difficult to control. If the shell is too thin, the processing is difficult and the scrap rate is high. If the shell is too thick, the total mass is too large. In addition, the strength of the casting material is lower than that of the forging material, and it is difficult to cast a large diameter shell. The stringer bearing riveting form has the problems of complex riveting process, a large number of riveted stringers, the positioning and riveting of stringers require auxiliary positioning of the jig, and the design of molded tooling when the skin specifications are diverse and not in full circle. The cost investment is large in the early stage of research and development. If the state of the shell changes slightly in the later stage, the jig needs to be modified or newly invested, resulting in serious loss and waste.

[0003] At present, the overall forming method of grid ribs generally adopts the five-axis machining center forging of forged tubes to solve the problems of uncontrollable shell weight and low strength of casting materials. However, the overall processing cost increases and the efficiency decreases. The shell wall thickness cannot be too thin. If it is too thin, the processing is difficult and the scrap rate is high.

[0004] The truss-bearing riveting form generally improves riveting efficiency and reduces costs by reducing the types of trusses and skins, optimizing the structural layout, and modifying existing molds, jigs, and tooling. However, this method has limited room for improvement, and there is still the problem of waste in that the jig needs to be modified or newly invested if the shell state is slightly changed. Summary of the invention

[0005] The purpose of the present invention is to provide a compartment shell structure which is stable in structure and convenient to process and assemble.

[0006] In order to solve the above problems, the present invention provides a cabin shell structure, including a front end frame, a rear end frame, a skin and a plurality of separation cylinders, the front end frame and the rear end frame are provided with a front supporting part and a rear supporting part on opposite sides, the two sides of the skin are respectively connected to the front supporting part and the rear supporting part, a plurality of separation cylinders are arranged circumferentially between the front end frame and the rear end frame, one end of the separation cylinder is connected to the front end frame and the other end is connected to the rear end frame, and the side of the separation cylinder is provided with a support part connected to the inner side of the skin.

[0007] The above scheme realizes the stable connection between the skin and the front frame and the rear frame by setting the front receiving part and the rear receiving part, effectively simplifies the overall structure and reduces the processing cost; at the same time, by directly connecting the separation cylinder between the front frame and the rear frame, and making the side of the separation cylinder abut against the inner side of the skin to support the skin, the separation cylinder can not only realize the basic cabin separation function, but also effectively improve the bearing strength and overall rigidity of the entire shell. Compared with the prior art, the processing and forming efficiency of each component of the cabin shell structure of the above scheme is high, the processability is good, the technology is mature, and the processing cost is low.

[0008] Preferably, a raised receiving piece is provided on the side of the end of the support portion close to the skin, and the receiving piece is riveted to the skin. A groove is provided at the other end of the support portion, and the separation cylinder is welded to the groove, so that the support portion can play a better transition buffer role between the separation cylinder and the skin, further improving the overall structural strength.

[0009] Preferably, the support parts are multiple and distributed along the axial direction of the separation cylinder, thereby further enhancing the supporting effect of the support parts on the separation cylinder and enhancing the supporting effect of the separation cylinder and the support parts on the skin.

[0010] Preferably, the front receiving portion is a front annular groove penetrating the outer side wall of the front frame, and the rear receiving portion is a rear annular groove penetrating the outer side wall of the rear frame, and the groove depths of the front annular groove and the rear annular groove are both equal to the thickness of the skin. The provision of the front annular groove and the rear annular groove enables the opposite sides of the front frame and the rear frame to form a skirt-like structure, which facilitates the positioning and assembly of the skin, and ensures that the outer side surfaces of the skin, the front frame and the rear frame are in a flat state after assembly.

[0011] Preferably, the inner side walls of the front end frame and the rear end frame are provided with a plurality of reinforcing ribs distributed along the circumferential direction, and the reinforcing ribs are used to support the front supporting part and the rear supporting part, thereby improving the structural strength of the front end frame and the rear end frame, and ensuring that the connection between the skin and the front end frame and the rear end frame is more stable.

[0012] Preferably, the front supporting part is provided with a first positioning hole, the rear supporting part is provided with a second positioning hole, the front and rear sides of the skin are respectively provided with a first positioning rivet for connecting to the first positioning hole and a second positioning rivet for connecting to the second positioning hole, the front and rear sides of the skin are respectively riveted to the front supporting part and the rear supporting part, and the assembly is simple and convenient.

[0013] Preferably, support ribs are further included, and the butt seams of the skin are connected to the support ribs, thereby further reducing the difficulty of assembling the skin relative to the front end frame and the rear end frame, and the support ribs can play a certain role in improving the strength.

[0014] Preferably, the inner side of the front end frame is provided with a plurality of mounting frames distributed along the circumferential direction, the inner side of the rear end frame is provided with a plurality of bases distributed along the circumferential direction, the bottom end of the separation cylinder is connected to the base, the cylinder mouth end of the separation cylinder is connected to the mounting frame, and the mounting frame is provided with a through hole for the inner rod of the separation cylinder to pass through, so that the overall structure is stable and convenient for subsequent assembly.

[0015] Preferably, the outer wall of the front end frame is provided with a plurality of explosive bolt boxes distributed along the circumferential direction, and the explosive bolt boxes are arranged at intervals from the mounting frame; the outer wall of the rear end frame is provided with a plurality of U-shaped grooves distributed along the circumferential direction, and the U-shaped grooves are arranged at intervals from the base, so that the overall layout is more reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an axonometric schematic diagram of a cabin shell structure;

[0017] Figure 2 A schematic diagram of a front end frame of a compartment shell structure ( Figure 2 The right side is the side from the front frame to the rear frame);

[0018] Figure 3 A schematic diagram of a rear end frame of a compartment shell structure ( Figure 3 The right side is the side from the rear end frame to the front end frame);

[0019] Figure 4 A schematic diagram of the skin of a cabin shell structure

[0020] Figure 5 A schematic diagram of a separation cylinder and a support portion of a compartment shell structure;

[0021] Figure 6 A schematic diagram of a support portion of a compartment shell structure.

[0022] Description of reference numerals:

[0023] 1. Front end frame; 110. Front supporting part; 111. First positioning hole; 120. Mounting frame; 121. Through hole; 130. Explosive bolt box; 2. Rear end frame; 210. Rear supporting part; 211. Second positioning hole; 220. Base; 230. U-shaped groove; 3. Skin; 310. First positioning rivet; 320. Second positioning rivet; 330. Butt joint; 4. Separation cylinder; 410. Support part; 411. Groove; 412. Supporting piece; 5. Reinforcing rib; 6. Support rib. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail in conjunction with the accompanying drawings. The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. It should also be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, inside, outside) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] See also Figure 1-Figure 6 A cabin shell structure provided by an embodiment of the present invention comprises a front end frame 1, a rear end frame 2, a skin 3 and a plurality of separation cylinders 4, a front receiving portion 110 and a rear receiving portion 210 are respectively provided on opposite sides of the front end frame 1 and the rear end frame 2, both sides of the skin 3 are respectively connected to the front receiving portion 110 and the rear receiving portion 210, a plurality of separation cylinders 4 are circumferentially arranged between the front end frame 1 and the rear end frame 2, one end of the separation cylinder 4 is connected to the front end frame 1 and the other end is connected to the rear end frame 2, and a support portion 410 connected to the inner side of the skin 3 is provided on the side of the separation cylinder 4.

[0026] The above scheme realizes a stable connection between the skin 3 relative to the front end frame 1 and the rear end frame 2 by setting the front supporting part 110 and the rear end frame 2, effectively simplifying the overall structure and reducing the processing cost; at the same time, by directly connecting the separation cylinder 4 between the front end frame 1 and the rear end frame 2, and making the side of the separation cylinder 4 abut against the inner side of the skin 3 to achieve support for the skin 3, the separation cylinder 4 can not only realize the basic cabin separation function, but also effectively improve the bearing strength and overall stiffness of the entire shell.

[0027] Compared with the prior art, the above scheme has high processing efficiency, good processability, mature technology and low processing cost for each component of the cabin shell structure. Compared with the integral forming method of the grid rib, this scheme effectively improves the processing efficiency and greatly reduces the cost; compared with the truss load-bearing riveting form, this application uses the skin 3 as a positioning reference to achieve the relative connection between the skin 3 and the front frame 1, the rear frame 2, and the separation cylinder 4, and the skin 3 does not require a complex molding die or an additional complex jig when it is formed. The processing and assembly efficiency is high, avoiding the waste of jigs that have been invested due to shell changes. The cost of auxiliary tooling is almost zero, and the quality of each component of the shell is controllable. It should be understood that the support portion 410 and the separation cylinder 4 can be integrated or split. For example, in some embodiments, the support portion 410 refers to the outer side wall of the separation cylinder 4, that is, the outer side wall of the separation cylinder 4 is used as the support portion 410 to abut and support the skin 3.

[0028] In other embodiments, the support portion 410 is independent of the separation cylinder 4, and a raised receiving piece 412 is provided on the side of the end of the support portion 410 close to the skin 3, and the receiving piece 412 is provided with a rivet connected to the skin 3. It should be understood that the support portion 410 and the skin 3 can also be connected by other common methods such as screw connection or welding, and this design does not limit this. A groove 411 is provided at the end of the support portion 410 away from the skin 3, and the separation cylinder 4 is welded to the groove 411, so that the support portion 410 can play a transition buffer role between the separation cylinder 4 and the skin 3, thereby improving the overall structural strength.

[0029] Furthermore, there are three support parts 410 and they are evenly distributed along the axial direction of the separation cylinder 4, and at least one support part 410 is located in the middle of the separation cylinder 4, thereby further enhancing the supporting effect of the support part 410 on the separation cylinder 4, and enhancing the supporting effect of the separation cylinder 4 and the support part 410 on the skin 3.

[0030] In this embodiment, the front receiving portion 110 is a front annular groove penetrating the outer side wall of the front end frame 1, and the rear receiving portion 210 is a rear annular groove penetrating the outer side wall of the rear end frame 2, and the groove depths of the front annular groove and the rear annular groove are both equal to the thickness of the skin 3. The provision of the front annular groove and the rear annular groove enables the opposite sides of the front end frame 1 and the rear end frame 2 to form a skirt-like structure, which facilitates the positioning and assembly of the skin 3, and ensures that the outer side surfaces of the skin 3, the front end frame 1 and the rear end frame 2 are flat after assembly.

[0031] Furthermore, the inner walls of the front end frame 1 and the rear end frame 2 are provided with a plurality of circumferentially distributed reinforcing ribs 5. The reinforcing ribs 5 of the front end frame 1 extend to the vicinity of the front supporting portion 110 to reinforce the front supporting portion 110, and the reinforcing ribs 5 of the rear end frame 2 extend to the vicinity of the rear supporting portion 210 to reinforce the rear supporting portion 210, thereby improving the structural strength of the front end frame 1 and the rear end frame 2 and ensuring that the connection between the skin 3 relative to the front end frame 1 and the rear end frame 2 is more stable.

[0032] In this embodiment, the front receiving portion 110 is provided with a first positioning hole 111, the rear receiving portion 210 is provided with a second positioning hole 211, and the front and rear sides of the skin 3 are respectively provided with a first positioning rivet 310 for connecting to the first positioning hole 111 and a second positioning rivet 320 for connecting to the second positioning hole 211, and the front and rear sides of the skin 3 are respectively riveted to the front receiving portion 110 and the rear receiving portion 210, so that the assembly is simple and convenient. It should be understood that the skin 3 can also be connected to the front receiving portion 110 and the rear receiving portion 210 by other common methods in the prior art, such as screwing or welding, and this design does not limit this.

[0033] As an optimization of the above embodiment, support ribs 6 are also included, and the joint seams 330 of the skin 3 are connected to the support ribs 6, thereby further reducing the difficulty of assembling the skin 3 relative to the front frame 1 and the rear frame 2, and the support ribs 6 can play a certain role in improving the strength.

[0034] As an optimization of the above embodiment, a plurality of mounting frames 120 distributed along the circumferential direction are provided on the inner side of the front end frame 1, a plurality of bases 220 distributed along the circumferential direction are provided on the inner side of the rear end frame 2, the bottom end of the separation cylinder 4 is connected to the base 220, the cylinder mouth end of the separation cylinder 4 is connected to the mounting frame 120, and the mounting frame 120 is provided with a through hole 121 for the inner rod of the separation cylinder 4 to pass through, so that the overall structure is stable, and the inner rod of the separation cylinder 4 can be installed into the separation cylinder 4 through the through hole 121, and the assembly is simple and convenient.

[0035] Furthermore, the outer wall of the front end frame 1 is provided with a plurality of explosive bolt boxes 130 distributed along the circumferential direction, and the explosive bolt boxes 130 are arranged at intervals with the mounting frame 120; the outer wall of the rear end frame 2 is provided with a plurality of U-shaped grooves 230 distributed along the circumferential direction, and the U-shaped grooves 230 are in the shape of grooves 411 and are arranged at intervals with the base 220, so that the overall layout is more reasonable.

[0036] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. For those skilled in the art, various changes and modifications can be made without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the invention.

Claims

1. A compartment shell structure, characterized in that: The invention comprises a front end frame (1), a rear end frame (2), a skin (3) and a plurality of separation cylinders (4); the front end frame (1) and the rear end frame (2) are provided with a front receiving portion (110) and a rear receiving portion (210) on opposite sides thereof; the two sides of the skin (3) are connected to the front receiving portion (110) and the rear receiving portion (210) respectively; the plurality of separation cylinders (4) are arranged circumferentially between the front end frame (1) and the rear end frame (2); one end of the separation cylinder (4) is connected to the front end frame (1) and the other end is connected to the rear end frame (2); the side surface of the separation cylinder (4) is provided with a support portion (410) connected to the inner side of the skin (3); The inner side of the front end frame (1) is provided with a plurality of mounting frames (120) distributed along the circumferential direction, the inner side of the rear end frame (2) is provided with a plurality of bases (220) distributed along the circumferential direction, the bottom end of the separation cylinder (4) is connected to the base (220), the cylinder mouth end of the separation cylinder (4) is connected to the mounting frame (120), and the mounting frame (120) is provided with a through hole (121) for the inner rod of the separation cylinder (4) to pass through.

2. A compartment shell structure according to claim 1, characterized in that: A protruding receiving piece (412) is provided on the side of the end of the support portion (410) close to the skin (3), and the receiving piece (412) is riveted to the skin (3). A groove (411) is provided at the other end of the support portion (410), and the separation cylinder (4) is welded to the groove (411).

3. A compartment shell structure according to claim 2, characterized in that: The supporting parts (410) are multiple and distributed along the axial direction of the separation cylinder (4).

4. A compartment shell structure according to claim 1, characterized in that: The front supporting portion (110) is a front annular groove extending through the outer wall of the front end frame (1), and the rear supporting portion (210) is a rear annular groove extending through the outer wall of the rear end frame (2), and the depths of the front annular groove and the rear annular groove are both equal to the thickness of the skin (3).

5. A compartment shell structure according to claim 4, characterized in that: The inner side walls of the front end frame (1) and the rear end frame (2) are both provided with a plurality of reinforcing ribs (5) distributed along the circumferential direction, and the reinforcing ribs (5) are used to support the front supporting portion (110) and the rear supporting portion (210).

6. A compartment shell structure according to claim 4, characterized in that: The front supporting part (110) is provided with a first positioning hole (111), the rear supporting part (210) is provided with a second positioning hole (211), the front side and the rear side of the skin (3) are respectively provided with a first positioning rivet (310) for connecting to the first positioning hole (111) and a second positioning rivet (320) for connecting to the second positioning hole (211), and the front side and the rear side of the skin (3) are respectively riveted to the front supporting part (110) and the rear supporting part (210).

7. A compartment shell structure according to claim 1, characterized in that: It also includes supporting ribs (6), to which the butt seams (330) of the skin (3) are connected.

8. A compartment shell structure according to claim 1, characterized in that: The outer side wall of the front end frame (1) is provided with a plurality of explosive bolt boxes (130) distributed along the circumferential direction, and the explosive bolt boxes (130) are arranged at intervals from the mounting frame (120); the outer side wall of the rear end frame (2) is provided with a plurality of U-shaped grooves (230) distributed along the circumferential direction, and the U-shaped grooves (230) are arranged at intervals from the base (220).

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