| 摘要: |
| 表面织构化是提升机械密封性能的有效途径，合适的密封副材料是保证机械密封长寿命、高可靠性运行的先决条件。为获得基于不同密封副材料的表面织构设计原则，选取硬质合金/碳石墨、硬质合金/碳化硅两类密封副材料，在硬质合金密封环端面加工不同参数的直线型、V型槽表面织构，研究其润滑和密封特性。结果表明，对于硬质合金/碳石墨密封副，在密封端面加工面积率为4%、（θ，β）参数为（-30°，60°）的V型沟槽织构具有较优的减摩和抑制泄漏效果；对于硬质合金/碳化硅密封副，织构化密封端面能显著降低摩擦因数和启动力矩、促进密封端面热量排散、且不会增加泄漏，面积率为6%直槽型织构效果最优。进一步揭示了织构类型和排布形式对润滑和密封性能的作用机理，为不同工况下密封副端面织构化设计提供了参考。 |
| 关键词: 机械密封 表面织构 润滑 泄漏 流向引导 反向泵送 |
| DOI：10.11933/j.issn.1007-9289.20190119002 |
| 分类号:TG174.44;TH117 |
| 基金项目:国家自然科学基金（51675268，51805252）；中国博士后科学基金（2019M651822） |
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| Surface Texturing of Different Sealing Materials and Their Lubrication and Sealing Performances |
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DAI Qingwen, LI Siyuan, WANG Xiuying, HUANG Wei, WANG Xiaolei
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National Key Laboratory of Science and Technology on Helicopter Transmission, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China
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| Abstract: |
| Surface texturing is an effective way to improve the mechanical seal performances, while suitable sealing material is a prerequisite for ensuring long life and high reliability operation. To obtain the surface texture design principle based on different sealing materials, two types of sealing materials of cemented carbide/carbon graphite and cemented carbide/silicon carbide were employed. Straight and V-shaped grooves with different parameters were processed on the end face of cemented carbide sealing ring, and their lubrication and sealing performances were investigated. It is found that for cemented carbide/carbon graphite sealing pairs, a pattern of V-shaped grooves with an area densitiy of 4% and (θ, β) of (-30°, 60°) has an excellent anti-friction and anti-leakage performance. For cemented carbide/silicon carbide sealing pairs, surface texturing can reduce the friction coefficient and starting torque and improve the heat dissipation capacity without additional leakage, and a pattern of straight grooves with an area density of 6% has an optimum efficiency. The influence mechanism of texture type and arrangement on the lubrication and sealing properties is revealed, and a reference for surface texturing of mechanical seals under different working conditions is proposed. |
| Key words: mechanical seal surface texture lubrication leakage direction guide reverse pumping |
