Abstract This study designed a bio-inspired piston with a cylindrical pit array according to the BW-250 slime pump piston based on the surface structure of earthworm and leech. The friction was tested and analyzed. The friction pair mechanic system was modeled for finite element analysis, and the oil film test was supplemented. Results demonstrate that the bio-inspired piston show a lower friction force than the standard piston and a drag reduction rate that is above 10%. Cylindrical pit array can reduce the flow velocity of lubricating oil and increase the oil film pressure. The length and thickness of the oil film over the bio-inspired piston are higher than those of standard pistons.

中文翻译：

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圆柱凹坑阵列对BW-250煤泥泵活塞-缸套摩擦副摩擦学性能的影响

摘要 本研究根据蚯蚓和水蛭的表面结构，根据BW-250煤泥泵活塞设计了一种圆柱形凹坑阵列仿生活塞。对摩擦进行了测试和分析。对摩擦副力学系统进行了有限元分析，并补充了油膜试验。结果表明，仿生活塞的摩擦力低于标准活塞，减阻率高于 10%。圆柱形凹坑阵列可以降低润滑油的流速，增加油膜压力。仿生活塞上的油膜长度和厚度均高于标准活塞。