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| Life Evaluation Method of O-type Rubber Seal Ring Based on Cyclic Impact Acceleration Test |
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| DOI：10.7643/issn.1672-9242.2023.01.001 |
| KeyWord:seal ring life evaluation temperature cycle acceleration life test Coffin-Manson model fixtures |
| Author | Institution |
| WANG Yan-yan |
Southwest Institute of Technology and Engineering, Chongqing , China |
| QIN Chao-xuan |
Southwest Institute of Technology and Engineering, Chongqing , China |
| ZHAO Fang-chao |
Southwest Institute of Technology and Engineering, Chongqing , China |
| ZHU Hao-ruo |
Southwest Institute of Technology and Engineering, Chongqing , China |
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| Abstract: |
| The work aims to quickly and accurately evaluate the storage life of O-type rubber seal ring under temperature cycling condition. Special fixtures were designed to simulate the real compression condition of O-type rubber seal ring. The degradation data of seal ring were obtained by temperature cycling impact acceleration life tests under four stress conditions. The false failure life of seal ring was analyzed and obtained. The modified Coffin-Manson model was constructed and the false failure life data obtained under different test conditions were used to estimate the parameters of the model. Then, the Coffin-Manson life prediction model was obtained, and the storage life of seal ring was extrapolated under normal temperature. The test results showed that the exponential model could describe the degradation of the seal ring more accurately than the logarithmic model and the linear model. After evaluated by Coffin-Manson model, the storage life of the O-type rubber seal ring under normal temperature was 6.13 years, which was in accordance with the engineering experience data. The proposed life evaluation method of O-type rubber seal ring based on cyclic impact acceleration test can accurately evaluate the storage life of seal ring, greatly shorten the test cycle, save the time and cost of life evaluation test, and provide reference value for the life evaluation of seal devices. |
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