ISSN   1004-0595

CN  62-1224/O4

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管博文, 龚适, 张峰, 孙同明, 刘晓红, 左骏红, 蔡振兵. 航空液压柱塞泵滑靴镀银层摩擦磨损机理研究[J]. 摩擦学学报(中英文), 2024, 44(10): 1−11. doi: 10.16078/j.tribology.2023158
引用本文: 管博文, 龚适, 张峰, 孙同明, 刘晓红, 左骏红, 蔡振兵. 航空液压柱塞泵滑靴镀银层摩擦磨损机理研究[J]. 摩擦学学报(中英文), 2024, 44(10): 1−11. doi: 10.16078/j.tribology.2023158
GUAN Bowen, GONG Shi, ZHANG Feng, SUN Tongming, LIU Xiaohong, ZUO Junhong, CAI Zhenbing. Friction and Wear Mechanism of Silver-Coated Layer of Aviation Hydraulic Plunger Pump's Slipper[J]. Tribology, 2024, 44(10): 1−11. doi: 10.16078/j.tribology.2023158
Citation: GUAN Bowen, GONG Shi, ZHANG Feng, SUN Tongming, LIU Xiaohong, ZUO Junhong, CAI Zhenbing. Friction and Wear Mechanism of Silver-Coated Layer of Aviation Hydraulic Plunger Pump's Slipper[J]. Tribology, 2024, 44(10): 1−11. doi: 10.16078/j.tribology.2023158

航空液压柱塞泵滑靴镀银层摩擦磨损机理研究

Friction and Wear Mechanism of Silver-Coated Layer of Aviation Hydraulic Plunger Pump's Slipper

  • 摘要: 由于液压柱塞泵柱塞长期在高压、高速和高载的极端工况下运动,界面发生的摩擦磨损导致其滑靴端面出现镀银层剥落和网纹腐蚀等损伤现象,严重影响了装备服役安全. 利用超景深显微镜、维氏硬度计、SEM (扫描电镜)和EDS (能量色散X射线谱仪)对服役后的滑靴端面进行表征,并探究滑靴锡青铜表面网纹形成及镀银层剥落机理. 研究结果表明:滑靴锡铸造青铜表面存在的孔隙和组织偏析等缺陷会导致镀银层结合强度下降,在实际工况下发生严重的摩擦磨损导致镀银层发生剥落,剥落的银屑颗粒在磨损过程中进一步导致镀银层磨损加剧. 对滑靴表面黑色网纹的产生机理进行了分析,发现基体铸造锡青铜逆偏析纹路在退镀银过程中,受到酸性溶液腐蚀形成Cu-Sn-O化合物,导致界面出现类似金相晶界纹路的黑色网纹.

     

    Abstract: Hydraulic piston pump is widely used in aviation machinery because of its compact structure, stable transmission, high power ratio, high pressure and high flow rate. With the rapid development of aviation technology and the high-strength use of aviation equipment, it is very important whether the plunger pump can withstand high pressure, high speed and high performance after service. As one of the key friction parts of the hydraulic plunger pump, the slipper boots move under extreme conditions of high pressure, high speed, high load and large displacement for a long time, and the force is very complicated. The end face of the slipper shoe is more prone to impact contact friction and wear, and the coating is more prone to peeling, which ultimately leads to the shortening of the service life of the hydraulic piston pump. Therefore, it is very important to study the wear behavior of the end face of the hydraulic plunger pump. The plunger in a hydraulic piston pump operates under extreme conditions, enduring high pressure, high speeds, and heavy loads over extended periods. The resultant friction and wear at the interface lead to surface damage on the slipper shoe. The damage includes spalling of the silver coating and corrosion of the mesh, which significantly impacts the equipment's safety and service life. To investigate this issue, we conducted post-service analysis of the slipper's end face using an ultra-depth microscope, a Vickers hardness tester, SEM, and EDS. This analysis aimed to elucidate the mechanisms behind the mesh formation on the tin bronze surface of the slipper and the spalling of the silver coating. The results showed that the defects such as pores and segregation on the surface of slipper shoes tin cast bronze would cause the bonding strength of the silver plating layer to decrease, and serious friction and wear would lead to spalling of the silver plating layer under actual working conditions. The spalling silver particles would further aggravate the wear of the silver plating layer during the wear process. The mechanism of black mesh on the surface of sliders was analyzed, and it was found that the reverse segregation pattern of matrix cast tin bronze was corroded by acid solution to form Cu-Sn-O compound during the process of silver deplating, resulting in black mesh similar to metallographic grain boundary pattern on the interface.

     

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