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| Electrical Contact Performance and Wear under Simulated Interface Pollution Conditions |
| Received:February 02, 2021 Revised:April 25, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2022.04.017 |
| KeyWord:sliding wear electrical contact interface pollution atmosphere environment load |
| Author | Institution |
| GONG Cong-yu |
School of Mechanical Engineering, Southwest Jiaotong University, Chengdu , China |
| NIE Yu-chen |
School of Mechanical Engineering, Southwest Jiaotong University, Chengdu , China |
| CAO Zhong-qing |
School of Mechanical Engineering, Southwest Jiaotong University, Chengdu , China |
| CAI Zhen-bing |
School of Mechanical Engineering, Southwest Jiaotong University, Chengdu , China |
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| Abstract: |
| The work aims to study the influence of load on the electrical contact performance under interface pollution conditions by simulating the atmosphere of organic volatilization. Copper was selected as the base and stored in an organic atmosphere. The original surface and the stored surface were used as the surface to be tested. They were subjected to sliding electric contact tests under different loads in the atmospheric and organic atmospheres. The electric contact performance was analyzed by the coefficient of friction and contact resistance. The wear mechanism was revealed by combining with the appearance, profile and composition of wear scars. Aerosols in organic atmosphere had higher resistance values and reduced friction coefficients. When the load was low, the contact resistance value reached 0.1 Ω or above. In organic atmosphere, the wear depths decreased to less than 1 μm, and the wear was reduced. When the load was high, the contact resistance could reach 0.01 Ω in both environments, but the adhesion wear was aggravated. Compared with the original samples, the contact resistance of the stored samples increased, and the wear depths decreased. The results show that the electrical contact performance of organic atmosphere under low load decreases obviously. The wear of contact pair is aggravated under high load condition. Aerosol has certain lubricity and can reduce wear between contact pairs. The polluted layer has higher contact resistance and reduces the wear between contact pairs. |
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