| TANG Jie,QI Kai,ZENG Jie,LI Yu-shuai,ZENG Xiang-rui,LU Xin.Effect of Load on the Tribological Properties of Metal/Textured EPDM Seal Pair[J],50(7):243-249 |
| Effect of Load on the Tribological Properties of Metal/Textured EPDM Seal Pair |
| Received:September 30, 2020 Revised:December 23, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2021.07.025 |
| KeyWord:surface texture EPDM friction performance wear mechanism dynamic seal wear debris form normal load |
| Author | Institution |
| TANG Jie |
Aeronautical Engineering Institute, Civil Aviation University of China, Tianjin , China |
| QI Kai |
Aeronautical Engineering Institute, Civil Aviation University of China, Tianjin , China |
| ZENG Jie |
Aeronautical Engineering Institute, Civil Aviation University of China, Tianjin , China |
| LI Yu-shuai |
Aeronautical Engineering Institute, Civil Aviation University of China, Tianjin , China |
| ZENG Xiang-rui |
Aeronautical Engineering Institute, Civil Aviation University of China, Tianjin , China |
| LU Xin |
Aeronautical Engineering Institute, Civil Aviation University of China, Tianjin , China |
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| Abstract: |
| The purpose of this article is to improve the wear resistance of EPDM or metal dynamic seal pair, reveal the wear mechanism and damage evolution law of textured rubber under different loads. The experimental method is to use a laser marker to process a regular array of pits on the surface of EPDM rubber, which will form a friction pair with small metal steel balls, then the UMT-2 friction and wear testing machine are used to carry out friction tests to study the tribological properties of the textured EPDM samples under different loads. Finally, the tribological information of the test process is obtained by analyzing the friction coefficient and wear rate, then the field emission scanning electron microscope and white light interference three- dimensional surface profiler are used to conduct surface microscopic analysis of wear scars and wear debris, and three-dimensional reconfiguration of the wear area is performed. The test results show that as the load increases, the amount of wear shows an upward trend, the friction coefficient of the non-textured EPDM specimen shows a downward trend, the friction coefficient of the textured surface first decreases and then increases. The texture tribological performance is best when the load is 35 N, and the wear amount is reduced by 33.4% compared with the non-textured sample. The coefficient of friction dropped by 24.2% with surface roughness of 245 nm, when the load is 80 N, the introduction of texture will increase the wear, during which the surface roughness reached 1.12×104 nm. Through the observation of wear surface morphology and wear debris morphology, it is found that the surface texture under medium and low loads can effectively reduce corrosion wear and adhesive wear, but under high load, the wear mechanism of the texture becomes abrasive wear. In general, under appropriate load, the texturing treatment can effectively improve the friction performance of EPDM, but the texture will increase wear under high load. |
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