Analysis of lubricating characteristics of valve plate pair of a piston pump

Wang, Zhaoqiang; Hu, Shan Shan; Hong, Jung-Pyo; Wang, Zhen; Liu, Xintian

doi:10.1016/j.triboint.2018.05.008

Cited by 26 publications

(12 citation statements)

References 21 publications

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“…Therefore, when considering the elastic deformation of the valve plate, the distribution of the oil film pressure on the entire distribution surface is essentially related to the formation of elastic deformation, and the model is essentially consistent with the results obtained by finite element calculation. 14,21…”

Section: Iterative Solution Resultsmentioning

confidence: 99%

Research on lubrication mechanism with fluid–solid coupling of port plate pair in swash plate axial piston pump

Wang

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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When a swash plate axial piston pump operates under high-pressure conditions, the valve plate will undergo warping deformation. Based on the theory of elastic fluid dynamic lubrication, this work establishes a fluid–solid coupling model of a swash plate axial piston pump and solves the governing equations of the lubrication with respect to the port plate pair. Cylinder speed, cylinder angle, fluid viscosity, oil film thickness, seal belt width, and structural parameters are also considered to observe their influence on the valve plate warpage deformation with the swash plate axial piston pump. The results show that the deformation cloud of the valve plate on the axial piston pump is symmetrical, with the axis line of the waist groove as the axis. The deformation of the outer seal zone on the high-pressure side of the valve plate is the largest, and the deformation of the outer seal zone on the low-pressure side of the valve plate is the smallest. Under the same conditions, the material and structure of the valve plate affect the thickness and shape of the oil film. This study provides a theoretical basis for the high pressure of the swash plate axial piston pump.

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Section: Iterative Solution Resultsmentioning

confidence: 99%

Research on lubrication mechanism with fluid–solid coupling of port plate pair in swash plate axial piston pump

Wang

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…By comparing the tribological performance of specimens with various texture modes and analyzing their wear and friction, the authors identified the optimal texturing parameters according to experimental data. Wang et al (2018) studied the effect of different texture shapes on the lubrication performance of the plunger pump valve, and the results showed that the hydrodynamic effect produced by microdimples could effectively improve the lubrication of the plunger valve. A comprehensive review on multiscale surface texture from the perspective of experiments and numerical methods was also conducted by Grützmacher et al (2019).…”

Section: Introductionmentioning

confidence: 99%

Influence of microdimple on lubrication performance of textured plunger pump

Jia

Zhou

Yin

et al. 2021

ILT

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Purpose The purpose of this study is to investigate the influence of dimple radius, depth and density on the lubrication performance of the plunger. Design/methodology/approach A lubrication model was adopted to consider eccentricity and deformation during the working process of the plunger, and a rig test was performed to confirm the simulation results. The texture was fabricated using laser surface texturing. Findings The simulation results suggested that when dimple radius or depth increases, oil film thickness of the plunger increases before decreasing, and asperity friction displays an opposite trend. Therefore, appropriate microdimple texture could facilitate lubrication performance improvement and reduce the wear. Microdimples were then lased on the plunger surface, and a basic tribological test was conducted to validate the simulation results. The experimental results suggested that the average friction coefficient decreased from 0.18 to 0.13, a reduction of 27.8%. Social implications The introduction of microdimple on a plunger couple to reduce friction and improve lubrication is expected to provide a new approach to developing high-performance plunger couple and improve the performance of the internal combustion engine. If applied, the surface texture could help reduce friction by around 27% and cap the cost relative to the plugger friction. Originality/value The microdimple texture was introduced into the plunger couple of a vehicle to reduce the friction and improve the performance. Findings suggested that surface texture could be used in the automotive industry to improve oil efficiency and lubrication performance. Peer review The peer review history for this article is available at: http://dx.doi.org/10.1108/ILT-07-2020-0259.

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“…Countries with strong hydraulic industries such as the USA, Germany, Japan, and Italy are major producers of high-pressure piston pumps and their key components [1,2]. As a key component of the port plate pair of a piston pump, the cylinder block has been studied primarily from the perspective of its impact on the port plate pair [3][4][5][6]. When subjected to alternating loads caused by high-pressure changes during operation, cylinder blocks sometimes develop cracks or breakage and subsequently fail to function properly [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Analysis on cracks of press-fit cylinder blocks in high-pressure piston pumps

Sun

2019

J Braz. Soc. Mech. Sci. Eng.

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High pressurisation is one of the important developmental techniques for piston pumps. Given that press-fit cylinder blocks of instruction machinery develop cracks or breakage; based on the DIN 7190(2001) and GB/T 5371-2004, the amounts of interference in the press-fit cylinder block were calculated. The maximum, minimum, and average amounts of interference were 0.1689, 0.0576, and 0.1133 mm, respectively. Finite-element analysis of interference force as a single applied force and interference force in conjunction with hydraulic pressure was investigated in this study as multiple applied forces in order to investigate the causes of cracks. The results indicate that at the maximum interference, the weak section where cracks easily develop is the thin wall between the cylinder bore and the spring hole. The analysis results are consistent with the observed positions of the cracks, thereby providing a reference for the future design and production of piston pumps.

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Analysis of lubricating characteristics of valve plate pair of a piston pump

Cited by 26 publications

References 21 publications

Research on lubrication mechanism with fluid–solid coupling of port plate pair in swash plate axial piston pump

Research on lubrication mechanism with fluid–solid coupling of port plate pair in swash plate axial piston pump

Influence of microdimple on lubrication performance of textured plunger pump

Analysis on cracks of press-fit cylinder blocks in high-pressure piston pumps

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