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| Storage Life of Silicone-rubber Sealing Ring for Solid Rocket Motor Based on Storage Condition |
| Received:September 25, 2023 Revised:October 11, 2023 |
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| DOI：10.7643/issn.1672-9242.2023.10.009 |
| KeyWord:solid rocket motor silicone-rubber material sealing ring accelerated aging test rapid evaluation of storage life equivalent temperature |
| Author | Institution |
| WU Di |
The 41st Institute of the Forth Academy of CASC, Xi'an , China |
| WANG Yu-ran |
The 41st Institute of the Forth Academy of CASC, Xi'an , China |
| HU Yu-meng |
The 41st Institute of the Forth Academy of CASC, Xi'an , China |
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| Abstract: |
| The work aims to evaluate the storage life of silicone-rubber sealing ring for solid rocket motor under multiple temperature conditions during the storage cycle. A series of accelerated aging tests were carried out to the silicone-rubber material. Combined with the test results and Arrhenius formula, the aging model for silicone-rubber material was established. Then, the equivalent law of accelerated aging of silicone-rubber material was obtained, and the accelerated aging test was carried out to the simulated sealing device according to the equivalent relationship to verify the sealing performance of aged silicone-rubber material. Finally, the equivalent temperature was calculated by sorting out the storage environment data of a solid rocket motor and the aging performance of silicone-rubber sealing ring was obtained combined with the test results. Thus, the aging life of sealing ring under this storage cycle was directly evaluated. Ultimately, it was concluded that the service life of silicone-rubber sealing ring could reach 20 years at 25 ℃ after the aging tests of silicone-rubber material and simulated sealing device. The equivalent temperature of the silicone-rubber sealing ring used for solid rocket motor during its storage cycle was 22.78 ℃, so it could directly come to a conclusion that the service life of silicone-rubber sealing ring used in this motor could meet the service life of 20 years in this storage environment. The aging life of rubber sealing ring can be obtained quickly by calculating the equivalent temperature under multiple temperature environment conditions during storage cycle and combining with the conclusion of accelerated aging test. |
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