海水径向柱塞泵陶瓷摩擦副摩擦学性能研究

海水径向柱塞泵通过增加单转柱塞往复运动频率,减少了泄漏量,提高了泵的容积效率,适用于低转速场合。但低速下的泵内摩擦副尤其是微型面接触摩擦副很难形成流体动力润滑,这就对摩擦副材料性能提出了较高要求。选择几种陶瓷材料与17-4PH配对,通过海水环境中销盘摩擦实验,考察了材料的摩擦学性能。实验结果表明在不同载荷下,ZrO₂摩擦系数和磨损量均为最低,磨损后的表面粗糙度最低。ZrO₂与17-4PH配对更适合作为微型面接触摩擦副的材料。

Tribological Property for Ceramics Friction Pair of Seawater Radial Piston Pump

The seawater radial piston pump can reduce the amount of the leakage and improve the pump volumetric efficiency by increasing the reciprocating frequency of the single plunger, and is suitable for low speed applications. However, the friction pair of the seawater radial piston pump, especially the micro surface contact pair, is difficult to form hydrodynamic lubrication, which made a higher demand for the performance of the friction material. Several ceramic materials are selected coupling with the 17-4PH. The tribological properties of the materials are investigated by the friction test in the seawater. The experimental results show that the friction coefficient and the wear of ZrO₂ are the lowest, and the surface is the most smooth. Therefore, compared with the other three materials, ZrO₂ and 17-4PH are more suitable as a micro surface contact pair material.