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| Performance Attenuation Model and Calendar Life Evaluation for Rubber Seal Ring of Main Reducer |
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| DOI：10.7643/issn.1672-9242.2023.04.006 |
| KeyWord:main reducer rubber seal ring performance attenuation model calendar life evaluation permanent compression deformation rate accelerated aging |
| Author | Institution |
| WU Yun-zhang |
Army Aviation Research Institute, Beijing , China |
| LI Jian |
Army Aviation Research Institute, Beijing , China |
| LI Chang-fan |
Army Aviation Research Institute, Beijing , China |
| SHEN Jun |
Army Aviation Research Institute, Beijing , China |
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| Abstract: |
| The work aims to establish the performance attenuation model for the rubber seal ring of the main reducer under storage/installation condition to evaluate its calendar life in actual storage and conversion coefficient under storage/installation condition. According to the actual size of the functional structure (actual assembly, initial axial thickness and axial thickness during compression), the actual product size and the safety margin, the failure criterion of rubber seals was determined. Accelerated aging tests at 5 temperature points were carried out to the actually used FX-4 and FX-17 rubber seal rings under the installation and at two initial compression rates. The aging parameters of the two rubber seal rings under the permanent compression deformation rate were determined. Then, the attenuation model was obtained by regression analysis. The permanent compression deformation rate of rubber seal ring after storage for 13 years was adopted to test the model and determine the conversion coefficient under storage/installation. With 25% as failure criterion, the calendar life of rubber seal ring could reach 19.8 years. In order to ensure the safe use and convenient field calculation, the use of FX-4 seal ring under installation for 1 year is equivalent to storage for 2 years and the use of FX-17 seal ring under installation for 1 year is equivalent to storage for 3 years. |
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