Method for recycling solid engine stored for long time as rocket sled engine

Abstract

According to the method for recycling the solid engine as the rocket sled engine after being stored for a long time, engine parts after being stored for a long time are recycled and designed as a rocket sled boosting engine. According to the rocket sled engine, recycling of parts such as a combustion chamber shell and a spray pipe is achieved, a new engine meeting the working requirement of a rocket sled is formed by recharging and replacing an ignition device, and the engine can normally work in a strong vibration environment. The method passes verification of a certain type of engine which is stored for a long time and then designed, and passes actual skid-up test examination.

Description

Technical Field

[0001] The invention relates to the field of solid engines, and in particular to a design method for recycling solid engine parts. Background Art

[0002] For solid engines that have reached the end of their service life after long-term storage, the main factor affecting their service life is the combustion chamber charge. After long-term storage, the mechanical properties of the charge have deteriorated and cannot meet the use requirements, resulting in the engine not being able to work properly. The conventional treatment method is to scrap the engine as a whole or replace the combustion chamber charge. The combustion chamber is destroyed by open-air incineration. During the destruction process, the combustion chamber shell undergoes high-temperature annealing, and various mechanical properties (tensile strength) are reduced and cannot be used again. Other parts are also treated as scrap, resulting in a huge waste of resources and environmental pollution. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art, the present invention provides a method for recycling a solid engine after long-term storage into a rocket sled engine. The engine parts after long-term storage are recycled and designed into a rocket sled booster engine.

[0004] The specific steps of the technical solution adopted by the present invention to solve its technical problem are as follows:

[0005] Step 1: For engines that have been stored for a long time, disassemble them into parts, including the front head assembly, combustion chamber assembly, nozzle assembly, ignition device and accessories;

[0006] Step 2: Perform the first inspection on the front head assembly;

[0007] Step 3: Conduct the second inspection of the nozzle assembly;

[0008] Step 4: As the engine reaches the end of its service life, the ignition device of the original engine has almost no remaining life and is of little value. In addition, it is tightly sealed during production and difficult to disassemble. Therefore, it is scrapped after being powered on and ignited.

[0009] Step 5: Scrap the original engine accessories;

[0010] Step 6: For the disassembled combustion chamber assembly, use water punching or hydrodynamic cavitation technology to remove the combustion chamber charge and insulation from the shell, and perform a third inspection on the obtained combustion chamber shell;

[0011] Step 7: After the combustion chamber shell is tested and qualified, reload the propellant. According to the use requirements of the rocket sled engine, redesign the propellant type, or continue to use the original engine propellant type design to meet the design index requirements;

[0012] Step 8: For the strong vibration environment of the rocket sled engine, a new ignition device is redesigned, using a variable wall thickness tube and opening holes to achieve rapid ablation, so as to prevent large pieces of the tube from falling off and damaging the throat lining when passing through the nozzle in a strong vibration environment, thus affecting the engine operation;

[0013] Step 9: Assemble the recycled front head assembly and nozzle assembly with the new ignition device, combustion chamber, and accessories to obtain a booster engine suitable for the rocket sled.

[0014] In the second step, the first inspection content includes appearance inspection, size inspection, pressure bearing capacity inspection of the front head assembly, ultrasonic flaw detection of the metal and non-metal bonding surface, and the front head assembly that passes the inspection is recycled, while the one that fails the pressure bearing capacity and ultrasonic flaw detection is scrapped;

[0015] In the third step, the second test includes appearance inspection, size inspection, pressure bearing capacity inspection of metal parts, non-metallic radiographic inspection, and ultrasonic inspection of the bonding surface of non-metal and metal. The parts will be recycled after passing the inspection, and will be scrapped if the pressure bearing capacity and ultrasonic inspection are unqualified.

[0016] In the sixth step, the third test includes appearance inspection, size inspection, shell pressure bearing capacity inspection, and magnetic particle inspection. After passing the inspection, the shell is recycled and reused. The shell pressure bearing capacity inspection includes water pressure test and water explosion test.

[0017] The beneficial effect of the present invention is that the rocket sled engine designed by the present invention realizes the recycling of the combustion chamber shell, nozzle and other parts, and by recharging and replacing the ignition device, a new engine that meets the working requirements of the rocket sled is formed, and can work normally in a strong vibration environment. The method has been verified by a certain type of engine designed after long-term storage, and has passed the actual sled test assessment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a flow chart of the design method of the present invention.

[0019] Figure 2 It is the combustion chamber shell after being tested and qualified by the present invention.

[0020] Figure 3 The invention is an ignition device which is adapted to the vibration environment of a rocket sled.

[0021] Figure 4 It is a rocket sled engine after modification of the present invention. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Step 1: For engines that have been stored for a long time, disassemble them into parts, including the front head assembly, combustion chamber assembly, nozzle assembly, ignition device and accessories;

[0024] Step 2: Perform the first inspection on the front head assembly;

[0025] Step 3: Conduct the second inspection of the nozzle assembly;

[0026] Step 4: As the engine reaches the end of its service life, the ignition device of the original engine has almost no remaining life and is of little value. In addition, it is tightly sealed during production and difficult to disassemble. Therefore, it is scrapped after being powered on and ignited.

[0027] Step 5: Scrap the original engine accessories;

[0028] Step 6: For the disassembled combustion chamber assembly, use water punching or hydrodynamic cavitation technology to remove the combustion chamber charge and insulation from the shell, and perform a third inspection on the obtained combustion chamber shell;

[0029] Step 7: After the combustion chamber shell is tested and qualified, reload the propellant. According to the use requirements of the rocket sled engine, redesign the propellant type, or continue to use the original engine propellant type design to meet the design index requirements;

[0030] Step 8: For the strong vibration environment of the rocket sled engine, a new ignition device is redesigned, using a variable wall thickness tube and opening holes to achieve rapid ablation, so as to prevent large pieces of the tube from falling off and damaging the throat lining when passing through the nozzle in a strong vibration environment, thus affecting the engine operation;

[0031] Step 9: Assemble the recycled front head assembly and nozzle assembly with the new ignition device, combustion chamber, and accessories to obtain a booster engine suitable for the rocket sled.

[0032] In the second step, the first inspection content includes appearance inspection, size inspection, pressure bearing capacity inspection of the front head assembly, ultrasonic flaw detection of the metal and non-metal bonding surface, and the front head assembly that passes the inspection is recycled, while the one that fails the pressure bearing capacity and ultrasonic flaw detection is scrapped;

[0033] In the third step, the second test includes appearance inspection, size inspection, pressure bearing capacity inspection of metal parts, non-metallic radiographic inspection, and ultrasonic inspection of the bonding surface of non-metal and metal. The parts will be recycled after passing the inspection, and will be scrapped if the pressure bearing capacity and ultrasonic inspection are unqualified.

[0034] In the sixth step, the third test includes appearance inspection, size inspection, shell pressure bearing capacity inspection, and magnetic particle inspection. After passing the inspection, the shell is recycled and reused. The shell pressure bearing capacity inspection includes water pressure test and water explosion test.

[0035] In an embodiment of the present invention, a certain type of solid engine after long-term storage is recycled as a rocket sled engine. The flow chart is shown in Question 1. Figure 2 The combustion chamber casing of a certain type of engine was tested and found to be qualified. Figure 3 For the new ignition device, Figure 4 This is the rocket sled engine after assembly.

[0036] (1) The engine is disassembled to obtain the combustion chamber. The composite propellant, liner and insulation layer inside the combustion chamber are removed using water ramming technology. The shell is tested for size and water pressure and is found to be qualified. Figure 2 As shown;

[0037] (2) Design a new ignition device based on the strong vibration working environment of the rocket sled, such as Figure 3 As shown;

[0038] (3) Re-loading the combustion chamber shell that has passed the inspection, and assembling the combustion chamber, ignition device, top cover assembly, nozzle assembly, and accessories to obtain an engine suitable for a rocket sled, such as Figure 4 shown.

Claims

1. A method for recycling a solid engine after long-term storage into a rocket sled engine, characterized in that The steps include: Step 1: For engines that have been stored for a long time, disassemble them into parts, including the front head assembly, combustion chamber assembly, nozzle assembly, ignition device and accessories; Step 2: Perform the first inspection on the front head assembly; Step 3: Conduct the second inspection of the nozzle assembly; Step 4: As the engine reaches the end of its service life, the ignition device of the original engine has almost no remaining life and is of little value. In addition, it is tightly sealed during production and difficult to disassemble. Therefore, it is scrapped after being powered on and ignited. Step 5: Scrap the original engine accessories; Step 6: For the disassembled combustion chamber assembly, use water punching or hydrodynamic cavitation technology to remove the combustion chamber charge and insulation from the shell, and perform a third inspection on the obtained combustion chamber shell; Step 7: After the combustion chamber shell is tested and qualified, reload the propellant. According to the use requirements of the rocket sled engine, redesign the propellant type, or continue to use the original engine propellant type design to meet the design index requirements; Step 8: For the strong vibration environment of the rocket sled engine, a new ignition device is redesigned, using a variable wall thickness tube and opening holes to achieve rapid ablation, so as to prevent large pieces of the tube from falling off and damaging the throat lining when passing through the nozzle in a strong vibration environment, thus affecting the engine operation; Step 9: Assemble the recycled front head assembly and nozzle assembly with the new ignition device, combustion chamber, and accessories to obtain a booster engine suitable for the rocket sled.

2. The method for recycling a solid motor after long-term storage into a rocket sled motor according to claim 1, characterized in that: In the second step, the first inspection content includes appearance inspection, size inspection, pressure bearing capacity inspection of the front head assembly, and ultrasonic flaw detection of the metal and non-metal bonding surface. The front head assembly that passes the inspection is recycled, and the one that fails the pressure bearing capacity and ultrasonic flaw detection is scrapped.

3. The method for recycling a solid motor after long-term storage into a rocket sled motor according to claim 1, characterized in that: In the third step, the second test includes appearance inspection, size inspection, pressure bearing capacity inspection of metal parts, non-metallic radiographic inspection, and ultrasonic inspection of the bonding surface of non-metal and metal. The parts will be recycled after passing the inspection, and will be scrapped if the pressure bearing capacity and ultrasonic inspection are unqualified.

4. The method for recycling a solid motor after long-term storage into a rocket sled motor according to claim 1, characterized in that: In the sixth step, the third test includes appearance inspection, size inspection, shell pressure bearing capacity inspection, and magnetic particle inspection. After passing the inspection, the shell is recycled and reused. The shell pressure bearing capacity inspection includes water pressure test and water explosion test.

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