Abstract
A new kind of pit‐shaped bionic plunger proposes to reduce the frictional resistance of the reciprocating plunger and improve its sealing performance. According to the dorsal pore of earthworm, the bionic pit structure with different parameters designed and processed. The friction resistance test, observation test, and finite element analysis carried out. The results show that the bionic pit structure can improve the lubrication condition of the plunger surface and reduce the frictional resistance with a maximum drag reduction rate of 14.32%. The pit‐shaped bionic structure can increase the storage of lubricating oil, intercept the surface streamline, and decrease the flow rate. The bionic plungers’ mean contact pressure and oil film pressure increased significantly.
Highlights
Reciprocating moving parts are an essential indicator of a country’s manufacturing level and account for a large proportion of manufacturing equipment. e plunger is a typical reciprocating moving part and is widely used in various pumping mechanisms, such as plunger pump [1,2,3], concrete pump [4], and drilling mud pump [5, 6]
Azzi et al found that high friction and low sealing performance due to incorrect sealing material or geometry selection, improper surface texture, incompatible lubricants, or other frictional factors [10]
We use numerical simulation methods to explore friction and sealing mechanisms. e bionic plunger proposed in this paper is of great significance for the study of plunger drag reduction and sealing technology
Summary
Reciprocating moving parts are an essential indicator of a country’s manufacturing level and account for a large proportion of manufacturing equipment. e plunger is a typical reciprocating moving part and is widely used in various pumping mechanisms, such as plunger pump [1,2,3], concrete pump [4], and drilling mud pump [5, 6]. E plunger is a typical reciprocating moving part and is widely used in various pumping mechanisms, such as plunger pump [1,2,3], concrete pump [4], and drilling mud pump [5, 6]. Research directions for reciprocating moving parts mainly include friction, wear, lubrication, sealing, and numerical simulation [7,8,9]. In order to explore the friction mechanism, Tsala et al simulated the contact pressure, Von-Mises stress, and flow field [16,17,18]. E influence of the bionic pit structure on the friction and sealing performance of the plunger was studied. We use numerical simulation methods to explore friction and sealing mechanisms. E bionic plunger proposed in this paper is of great significance for the study of plunger drag reduction and sealing technology We use numerical simulation methods to explore friction and sealing mechanisms. e bionic plunger proposed in this paper is of great significance for the study of plunger drag reduction and sealing technology
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