Influence of Bionic Pit Structure on Friction and Sealing Performance of Reciprocating Plunger

Gao, Tianyu; Su, Bo; Jiang, Lei; Cong, Qian

doi:10.1155/2020/2130341

Cited by 5 publications

(2 citation statements)

References 21 publications

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“…Etsion found a variety of surface textures that can significantly improve the performance of friction pairs [18,19]. These surface structures mainly include pit structures [20,21], groove structures [22][23][24][25][26] and other structures [27][28][29][30]. The pit structure includes circular pits, oval pits and square pits [31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Inspired by Earthworms and Leeches: The Effects of Cylindrical Pit Arrays on the Performance of Piston-Cylinder Liner Friction Pairs

Gao,

Chen,

Tang

et al. 2023

Applied Sciences

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To improve the friction and wear performance of the piston-cylinder liner friction pair, inspired by earthworms and leeches, 27 kinds of pistons with cylindrical pit arrays are designed and processed. Through a friction test, four superior textured pistons are optimized, and wear, life and thermal imaging tests are performed. Finite element analysis of the friction pair model is performed, and the friction and wear mechanisms are discussed. The results show that the pistons with cylindrical pit arrays have excellent friction and wear performance, less heat generation by friction, longer lives and less scratches on the cylinder liner. The temperature of the optimized textured pistons was reduced by around 5–10 °C. The wear amount of some textured pistons was reduced by over 50%, resulting in an improvement in their lifespan of at least 30% or more. The results of the finite element analysis indicate that the textured piston exhibited reduced deformation and favorable stress–strain distribution and satisfied the required contact pressure.

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Section: Introductionmentioning

confidence: 99%

Inspired by Earthworms and Leeches: The Effects of Cylindrical Pit Arrays on the Performance of Piston-Cylinder Liner Friction Pairs

Gao,

Chen,

Tang

et al. 2023

Applied Sciences

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“…As inspired by this, the bionic nonsmooth surface effect has been applied to various occasions, such as bearings, piston rings, mechanical seals, and cutting tools in relative motion, to improve the tribological properties, especially to reduce the friction of mechanical parts. Gao et al [16] proposed a novel pitshaped bionic plunger inspired by the dorsal pore of the earthworm. Through friction resistance test and finite element analysis, it has shown that the bionic structure can significantly improve the lubrication condition of the plunger surface with a maximum drag reduction rate of 14.32%.…”

Section: Introductionmentioning

confidence: 99%

Effect of snake-biomimetic surface texture on finger sealing performance under hydrodynamic lubrication

Chen¹,

Zhang²,

Cui³

et al. 2021

Surf. Topogr.: Metrol. Prop.

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In recent years, surface textures have been found with extraordinary potential to improve lubrication of friction pairs, reduce viscosity, and improve wear resistance. To study the effects of surface textures in the finger sealing, as inspired by the snakeskin, four texture forms with different layouts are presented in this paper and comprehensive performance analysis is carried out under the condition of hydrodynamic lubrication. First, a numerical model of finger seals with surface textures under hydrodynamic lubrication is proposed based on the Reynolds equation. Then, finger seal performance analysis is carried out considering different texture surfaces in terms of forms, layouts, and geometric parameters. The results show that: (1) When the texture profile is consistent with the direction of rotor motion, it is beneficial to create better hydrodynamic pressure and improve sealing performance; (2) To achieve good friction and wear resistance of a textured finger seal, the texture depth should be as shallow as possible (<25 μm); (3) When the texture depth is equal to the seal clearance, the average dimensionless pressure reaches the greatest with smallest friction coefficient; (4) With the increase of the texture density, the average dimensionless pressure increases rapidly first and then gradually flattens, while the friction coefficient performs oppositely. Given the manufacturing economy, the suitable texture density is around 20%∼40%.

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Effect of Deposited Sn-Ag-Cu Solid Lubricant and Grooves on Tribological Properties of 42CrMo Steel under Grease Lubrication

Zhang

Shi

Xue

et al. 2022

J. of Materi Eng and Perform

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Influence of Bionic Pit Structure on Friction and Sealing Performance of Reciprocating Plunger

Cited by 5 publications

References 21 publications

Inspired by Earthworms and Leeches: The Effects of Cylindrical Pit Arrays on the Performance of Piston-Cylinder Liner Friction Pairs

Inspired by Earthworms and Leeches: The Effects of Cylindrical Pit Arrays on the Performance of Piston-Cylinder Liner Friction Pairs

Effect of snake-biomimetic surface texture on finger sealing performance under hydrodynamic lubrication

Effect of Deposited Sn-Ag-Cu Solid Lubricant and Grooves on Tribological Properties of 42CrMo Steel under Grease Lubrication

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