A method for connecting a full-opening composite shell joint of a solid rocket engine

Abstract

The application discloses a full-opening composite shell joint connecting method for a solid rocket engine, which comprises a structure design technology and a fiber winding process technology, can realize high-strength and high-efficiency connection of a combustion chamber joint and a composite structure, and greatly improves the internal pressure resistance of a large-opening composite shell. The method comprises the following steps: ①a metal joint is designed with a convex structure to improve the connection strength of the composite and the metal joint; ②the metal joint is designed with a doffing groove for realizing headless winding; ③the metal joint is designed with a clamping groove structure connected with a nozzle; and ④a variable winding angle fiber winding technology is used to realize headless winding and significantly improve the connection strength. The application realizes high-strength connection of the metal joint and the composite structure layer through structure design and fiber winding process optimization, and can effectively promote the application of the composite engine shell in the field of medium-large-caliber solid rocket engines.

Description

Technical Field

[0001] This invention belongs to the field of rocket technology, specifically relating to a method for connecting a fully open composite shell joint for a solid rocket engine. Background Technology

[0002] Fully open composite shells have wide applications in small-diameter (≤φ300mm) solid rocket motors. However, when the diameter exceeds φ300mm, under internal pressure conditions, especially during water burst testing, the fully open metal joints bear enormous axial tensile forces. Due to the low connection strength between the metal joint and the composite structural layer, the metal joint may fail, causing a low-pressure explosion. Existing fully open composite shell joint connection technologies employ bonding between the metal joint and the composite structural layer, as well as riveting between metal protrusions and the composite structural layer. These existing connection technologies rely on the bond strength between the metal and the composite to constrain joint displacement and deformation, failing to utilize the tensile strength of the fibers and thus limiting the application of fully open composite shells in medium- and large-diameter solid rocket motors. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this invention provides a method for connecting a fully open composite shell joint for solid rocket engines, including structural design technology and fiber winding process technology. This method achieves a high-strength and efficient connection between the combustion chamber joint and the composite structure, significantly improving the internal pressure resistance of the large-opening composite shell. The method includes: ① a raised structure on the metal joint to improve the connection strength between the composite and the metal joint; ② a yarn drop groove on the metal joint for end-less winding; ③ a slot structure on the metal joint for connection with the nozzle; and ④ end-less winding using variable winding angle fiber winding technology, significantly improving the connection strength. This invention achieves a high-strength connection between the metal joint and the composite structure layer through structural design and fiber winding process optimization, effectively promoting the application of composite material engine shells in medium and large-diameter solid rocket engines.

[0004] The technical solution adopted by this invention to solve its technical problem is as follows:

[0005] Step 1: Metal joint structure design;

[0006] Step 1-1: The metal joint is designed with raised structures embedded in the composite material layer to improve the connection strength between the composite material and the metal joint.

[0007] Steps 1-2: The metal connector is designed with a yarn drop groove for fiber drop when the yarn is wrapped without a cap;

[0008] Steps 1-3: The metal joint design and nozzle connection groove are used to improve the deformation of the joint and composite layer under internal pressure;

[0009] Step 2: Endless fiber winding;

[0010] During the continuous spiral winding process of fibers, the fiber winding angle is gradually increased to 90° by continuously changing the method, and the yarn is accurately dropped into the doffing groove to achieve endless winding.

[0011] An electronic device includes: a processor and a memory; the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory to cause the electronic device to perform the above-described housing connector connection method.

[0012] A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-described housing connector connection method.

[0013] A chip includes a processor for retrieving and running a computer program from a memory, causing a device on which the chip is mounted to perform the aforementioned housing connector connection method.

[0014] A computer program product includes a computer storage medium storing a computer program, the computer program including instructions executable by at least one processor, which, when executed by the at least one processor, implement the above-described housing connector connection method.

[0015] The beneficial effects of this invention are as follows:

[0016] This invention achieves a high-strength connection between the metal joint and the composite structure layer through structural design and fiber winding process optimization, which can effectively promote the application of composite material engine casings in the field of medium and large caliber solid rocket engines. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the microfluidic device of the present invention; Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] The fully open composite shell joint connection technology for solid rocket engines disclosed in this invention achieves a high-strength connection between the metal joint and the composite structure layer through structural design and fiber winding process optimization, which can effectively promote the application of composite material engine shells in the field of medium and large caliber solid rocket engines.

[0020] This invention discloses a method for connecting a fully open composite shell joint for a solid rocket motor. The method includes a metal joint structure design and a headless fiber winding technology.

[0021] The fully open metal joint structure includes the following:

[0022] 1) The metal joint is designed with a raised structure that is embedded in the composite material layer to improve the connection strength between the composite material and the metal joint;

[0023] 2) The metal joint is designed with a yarn drop groove for fiber drop when the yarn is wrapped without a cap;

[0024] 3) The metal joint is designed with a matching groove for connecting with the nozzle, which is used to improve the deformation of the joint and the composite layer under internal pressure.

[0025] Endless fiber winding technology includes the following:

[0026] 1) During the continuous spiral winding process of the fiber, the fiber winding angle is gradually increased to 90° by continuously changing the method, and the yarn is accurately dropped into the doffing groove to achieve endless winding.

[0027] Example:

[0028] The fully open composite shell joint connection technology for solid rocket engines disclosed in this invention can improve the joint connection strength by more than 30%, thereby solving the problem of low-pressure explosion of fully open composite shells for solid rocket engines with a diameter greater than φ300mm, and promoting the application of fully open composite shells in the field of medium and large diameter solid rocket engines.

Claims

1. A method for connecting a fully open composite shell joint for a solid rocket motor, characterized in that, Includes the following steps: Step 1: Metal joint structure design; Step 1-1: The metal joint is designed with raised structures embedded in the composite material layer to improve the connection strength between the composite material and the metal joint. Steps 1-2: The metal connector is designed with a yarn drop groove for fiber drop when the yarn is wrapped without a cap; Steps 1-3: The metal joint design and nozzle connection groove are used to improve the deformation of the joint and composite layer under internal pressure; Step 2: Endless fiber winding; During the continuous spiral winding process of fibers, the fiber winding angle is gradually increased to 90° by continuously changing the method, and the yarn is accurately dropped into the doffing groove to achieve endless winding.

2. An electronic device, characterized in that, include: Processor and memory; The memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory to cause the electronic device to perform the method as described in claim 1.

3. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the method as described in claim 1.

4. A chip, characterized in that, include: A processor for retrieving and running a computer program from memory, causing a device on which the chip is mounted to perform the method as described in claim 1.

5. A computer program product, characterized in that, The computer program product includes a computer storage medium storing a computer program, the computer program including instructions executable by at least one processor, which, when executed by the at least one processor, implement the method as described in claim 1.

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