Skirt and winding layer integrated composite combustion chamber shell
By adopting an integrated design of skirt and winding layer in the composite combustion chamber shell, the problem of easy debonding between skirt and winding layer in the prior art is solved, and the connection strength and structural simplicity are improved.
Patent Information
- Application Number
- CN202421784406.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-07-26
AI Technical Summary
The skirt and winding layer of the existing composite combustion chamber shell are prone to large-area debonding defects, resulting in the skirt pulling off during flight of the missile.
The composite combustion chamber shell design is designed with integrated skirt and winding layer. The front skirt, rear skirt and winding layer are integrated structures. The assembly parts are reduced by laying and winding integrated molding and strengthening the connection strength.
It greatly reduces the debonding defect, improves the connection strength between the shell and other sections of the missile, and simplifies the structure and manufacturing process.
Smart Images
Figure CN222962960U_ABST
Abstract
Description
Technical Field
[0001] The utility model patent relates to the technical field of the combustion chamber shell of a solid rocket motor. Specifically, it relates to a composite material combustion chamber shell with an integrated skirt and winding layer. Background Technique
[0002] The combustion chamber of a solid motor refers to the assembly of the solid motor shell and the loaded propellant column. Its function is to convert the chemical energy of the propellant into heat energy through combustion. There are two types of engine combustion chambers: metal combustion chamber shells and composite material combustion chamber shells.
[0003] Composite materials have excellent properties such as low specific gravity, high specific strength, and high specific modulus, greatly reducing the self-weight of the combustion chamber shell and increasing reliability. The composite material combustion chamber shell usually consists of structures such as front / rear joints, front / rear skirts, adiabatic structures, and winding layers. Among them, the skirt is the main structure for connecting the shell to other components of the missile and plays an extremely crucial role during flight.
[0004] The skirts of existing composite material combustion chamber shells are usually preformed composite material skirts or metal skirts, which are then connected to the shell through an upper skirt tooling. This structure easily causes large-area debonding defects between the skirt and the shell winding layer, resulting in the phenomenon of skirt pulling off during the flight of the missile.
[0005] In order to solve the debonding defect between the skirt and the upper skirt area of the winding layer, a composite material combustion chamber shell with an integrated skirt and winding layer is proposed. Content of the Utility Model
[0006] The purpose of the utility model is to provide a composite material combustion chamber shell with an integrated skirt and winding layer, aiming to solve the problem that in the existing technology, the skirts of existing composite material combustion chamber shells are usually preformed composite material skirts or metal skirts, which are then connected to the shell through an upper skirt tooling. This structure easily causes large-area debonding defects between the skirt and the shell winding layer, resulting in the phenomenon of skirt pulling off during the flight of the missile.
[0007] The utility model is realized as follows: A composite material combustion chamber shell with an integrated skirt and winding layer includes a front joint, a rear joint, an adiabatic structure, a winding layer, a front skirt, a rear skirt, and a steel sleeve. The adiabatic structure is fixedly connected to the inner side of the shell. The front joint is placed at the front end of the adiabatic structure. The rear joint is installed at the rear end of the adiabatic structure. The winding layer is placed on the outer side of the shell. The front skirt is placed at the front end of the winding layer; the rear skirt is placed at the rear end of the winding layer.
[0008] The front skirt, rear skirt, and winding layer are of an integrated structure; the steel sleeve is inlaid on the end faces of the front skirt and the rear skirt, and an internal thread structure is provided inside the steel sleeve.
[0009] Bolt holes are provided on the end face of the front joint to connect the igniter.
[0010] The end face of the rear joint is provided with bolt holes for connecting the nozzle.
[0011] The heat insulation structure is a laminated structure, and the heat insulation structure wraps the front joint and the rear joint.
[0012] The winding layer is a winding and paving structure.
[0013] The front skirt is a one-piece formed structure of paving and winding. The end face of the front skirt is provided with a through hole, and a steel sleeve is embedded inside the through hole, and an internal thread is provided inside the steel sleeve.
[0014] The rear skirt is a one-piece formed structure of paving and winding. By using a skirt paving device, it is integrally formed with the winding layer in a winding + paving manner. The end face of the rear skirt is provided with a through hole, and a steel sleeve is embedded inside the through hole, and an internal thread is provided inside the steel sleeve.
[0015] Compared with the prior art, the utility model has the following beneficial effects:
[0016] (1) For the utility model, the front skirt, the rear skirt and the winding layer are an integrated structure, canceling the interface in the upper skirt area, and greatly reducing the debonding defect.
[0017] (2) For the utility model, the front skirt, the rear skirt and the winding layer are integrally formed, greatly improving the connection strength between the shell and other sections of the missile.
[0018] (3) The utility model has few structural parts and a simple structure. Description of the Drawings
[0019] Figure 1 It is a schematic diagram of a composite material combustion chamber shell with an integrated skirt and winding layer of the utility model;
[0020] Figure 2 It is a partial view of the position of the front skirt of a composite material combustion chamber shell with an integrated skirt and winding layer of the utility model;
[0021] Figure 3 It is a partial cross-sectional view of the position of the rear skirt of a composite material combustion chamber shell with an integrated skirt and winding layer of the utility model.
[0022] Reference Signs:
[0023] 1. Front joint; 2. Heat insulation structure; 3. Winding layer; 31. Front skirt; 32. Rear skirt; 33. Steel sleeve; 4. Rear joint. Detailed Embodiment
[0024] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0025] The implementation of the present utility model will be described in detail below in conjunction with specific embodiments.
[0026] As Figures 1-3 shown, a composite combustion chamber shell with an integrated skirt and winding layer includes a front joint 1, a rear joint 4, a heat insulation structure 2, a winding layer 3, a front skirt 31, a rear skirt 32 and a steel sleeve 33. The heat insulation structure is fixedly connected to the inner side of the shell. The front joint 1 is placed at the front end of the heat insulation structure 2, the rear joint 4 is installed at the rear end of the heat insulation structure 2, the winding layer 3 is placed on the outer side of the shell, and the front skirt 31 is placed at the front end of the winding layer 3; the rear skirt 32 is placed at the rear end of the winding layer 3.
[0027] The front joint 1 is placed at the front end of the heat insulation structure 2: This design enables the front joint 1 to effectively connect with the heat insulation structure 2, enhancing the stability and sealing performance of the overall structure, and is beneficial to maintaining the high-temperature environment inside the combustion chamber.
[0028] The rear joint 4 is installed at the rear end of the heat insulation structure 2: Similar to the front joint 1, the installation position of the rear joint 4 ensures the integrity and sealing performance of the heat insulation structure 2, and at the same time provides a stable interface for the connection of the nozzle.
[0029] The winding layer 3 is placed on the outer side of the shell: The design of the winding layer 3 not only provides additional structural strength but also helps to protect the shell from high temperatures, enhancing the durability and safety of the combustion chamber.
[0030] The front skirt 31, the rear skirt 32 and the winding layer 3 are of an integrated structure; the steel sleeve 33 is inlaid on the end faces of the front skirt 31 and the rear skirt 32, and an internal thread structure is provided inside the steel sleeve 33.
[0031] The front skirt 31 is placed at the front end of the winding layer 3: The design of the front skirt 31 helps to protect the front end of the winding layer 3 from damage caused by high temperatures, and at the same time provides additional support for the front joint 1.
[0032] The rear skirt 32 is placed at the rear end of the winding layer 3: The design of the rear skirt 32 also plays a role in protection and support, ensuring the structural integrity and stability at the rear end of the combustion chamber.
[0033] The front skirt 31, the rear skirt 32 and the winding layer 3 are of an integrated structure: This integrated design simplifies the manufacturing process, reduces the number of components required for assembly, and improves the consistency and reliability of the overall structure.
[0034] The steel sleeve 33 is embedded in the end faces of the front skirt 31 and the rear skirt 32: The use of the steel sleeve 33 provides additional mechanical strength, ensures the stability of the front skirt 31 and the rear skirt 32 in a high-temperature environment, and at the same time, the internal thread structure facilitates subsequent connections.
[0035] The end face of the front joint 1 is provided with bolt holes for connecting the igniter.
[0036] The end face of the rear joint 4 is provided with bolt holes for connecting the nozzle.
[0037] The heat insulation structure 2 is a laminate structure, and the heat insulation structure 2 wraps the front joint 1 and the rear joint 4.
[0038] The winding layer 3 is a winding and laying structure.
[0039] The front skirt 31 is a one-piece formed structure of laying and winding. The end face of the front skirt 31 is provided with a through hole, and a steel sleeve 33 is embedded inside the through hole. The inside of the steel sleeve 33 is provided with internal threads.
[0040] The rear skirt 32 is a one-piece formed structure of laying and winding. Using the skirt laying device, it is integrally formed with the winding layer 3 by the winding + laying method. The end face of the rear skirt 32 is provided with a through hole, and a steel sleeve 33 is embedded inside the through hole. The inside of the steel sleeve 33 is provided with internal threads.
[0041] The end face of the front joint 1 is provided with bolt holes for connecting the igniter: This design makes the installation of the igniter simple and fast, facilitates maintenance and replacement, and improves the operation convenience.
[0042] The end face of the rear joint 4 is provided with bolt holes for connecting the nozzle: Similar to the front joint 1, the bolt hole design of the rear joint 4 makes the installation of the nozzle simple, ensures the sealed connection between the nozzle and the combustion chamber, and is beneficial to controlling the combustion process.
[0043] The heat insulation structure 2 is a laminate structure: The laminate design of the heat insulation structure 2 provides an efficient heat insulation effect, helps reduce heat loss, and maintains the high-temperature environment inside the combustion chamber.
[0044] The winding layer 3 is a winding and laying structure: This composite structure not only enhances the mechanical strength of the combustion chamber shell but also improves its heat resistance performance, ensuring stability in a high-temperature environment.
[0045] The front skirt 31 is a one-piece formed structure of laying and winding: The one-piece formed design of the front skirt 31 simplifies the manufacturing process, reduces the assembly steps, and improves the overall structural consistency and reliability.
[0046] The end face of the front skirt 31 is provided with a through hole, and a steel sleeve 33 is embedded inside the through hole: This design makes the connection between the front skirt 31 and the steel sleeve 33 more firm, and at the same time, the internal thread structure facilitates subsequent connections.
[0047] The rear skirt 32 is a structure formed by integral laying and winding: The integral forming design of the rear skirt 32 also improves the manufacturing efficiency and structural consistency. By using the skirt laying device, it is integrally formed with the winding layer 3 in a winding + laying manner, enhancing the stability and durability of the overall structure.
[0048] The end face of the rear skirt 32 is provided with a through hole, and a steel sleeve 33 is embedded inside the through hole: This design provides additional mechanical strength and connection convenience for the rear skirt 32, ensuring the stability of the rear skirt 32 in a high-temperature environment.
[0049] In the attached drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the attached drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.
[0050] As shown in the figure, it is a preferred embodiment provided by the present invention.
[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. A composite combustion chamber shell with an integrated skirt and a winding layer, characterized in that: The invention comprises a front joint (1), a rear joint (4), an insulating structure (2), a winding layer (3), a front skirt (31), a rear skirt (32) and a steel sleeve (33), wherein the insulating structure is fixedly connected to the inner side of a shell, the front joint (1) is arranged at the front end of the insulating structure (2), the rear joint (4) is installed at the rear end of the insulating structure (2), the winding layer (3) is arranged at the outer side of the shell, the front skirt (31) is arranged at the front end of the winding layer (3), and the rear skirt (32) is arranged at the rear end of the winding layer (3).
2. A composite combustion chamber casing with integrated skirt and winding layer according to claim 1, characterized in that: The front skirt (31), the rear skirt (32) and the winding layer (3) are an integrated structure; the steel sleeve (33) is embedded in the end surfaces of the front skirt (31) and the rear skirt (32), and an internal thread structure is provided inside the steel sleeve (33).
3. A composite combustion chamber casing with integrated skirt and winding layer according to claim 2, characterized in that: The end surface of the front joint (1) is provided with a bolt hole for connecting the igniter.
4. A composite combustion chamber casing with integrated skirt and winding layer according to claim 3, characterized in that: The end surface of the rear joint (4) is provided with a bolt hole for connecting the nozzle.
5. A composite combustion chamber casing with integrated skirt and winding layer according to claim 4, characterized in that: The thermal insulation structure (2) is a layered structure, and the thermal insulation structure (2) wraps the front joint (1) and the rear joint (4).
6. A composite combustion chamber casing with integrated skirt and winding layer according to claim 5, characterized in that: The winding layer (3) is a winding and paving structure.
7. A composite combustion chamber casing with integrated skirt and winding layer according to claim 6, characterized in that: The front skirt (31) is a paving and winding integrated structure, the end surface of the front skirt (31) is provided with a through hole, a steel sleeve (33) is embedded in the through hole, and an internal thread is provided in the steel sleeve (33).
8. A composite combustion chamber casing with integrated skirt and winding layer according to claim 7, characterized in that: The rear skirt (32) is a paving and winding integrated structure, and is formed integrally with the winding layer (3) by a skirt paving device using a winding + paving method. The end surface of the rear skirt (32) is provided with a through hole, and a steel sleeve (33) is embedded in the through hole, and the steel sleeve (33) is provided with an internal thread.