Experimental and numerical studies on erosion damage in damping holes on the valve plate of an axial piston pump

Ye, Shaogan; Zhang, Junhui; Xu, Bing; Song, Wei; Chen, Long; Shi, Haiyong; Zhu, Shiqiang

doi:10.1007/s12206-017-0827-4

Cited by 21 publications

(12 citation statements)

References 13 publications

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“…Mechanical components, and in particular hydraulic components, are often subject to sliding contacts and high contact pressure, which cause several failure modes such as delamination, seizure, noise, vibrations, and fatigue crack due to friction and wear [1][2][3]. The efficiency improvement in piston pumps and motors is one of the most important goals in the development of these machines [4,5].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Tribological Properties of Different Textured Lead Bronze Coatings under Severe Load Conditions

et al. 2021

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The purpose of this paper is to investigate the variation in the coefficient of friction (CoF) and also the wear in a lead bronze coating under different texture conditions. The tribological tests were performed using a tribometer with pin on disk configuration. Several kinds of textures, realised by a surface laser texturing, were tested by varying the diameter, depth, and density of the dimples under severe working conditions. The innovative aspect concerns the behaviour of the textured lead bronze coating and the lubrication conditions when the sample is subjected to extreme load conditions. Confocal microscopies and SEM (Scanning Electron Microscopy) / EDS (Energy Dispersive X-Ray Spectroscopy) analyses were performed to evaluate the texture behaviour and also the surface deterioration of the coating. The results show that the application of texture processing leads to an improvement in the tribological properties of the coating. By analysing separately the variation of the different geometric parameters of the dimples, it has been shown that the best results are obtained with a diameter of 50 μm, a density of 5%, and a depth of 5 μm.

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Section: Introductionmentioning

confidence: 99%

Investigation of the Tribological Properties of Different Textured Lead Bronze Coatings under Severe Load Conditions

et al. 2021

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“…Xu et al. 6 investigated flow ripple reduction in an axial piston pump by the multiobjective optimization of valve plate.…”

Section: Introductionmentioning

confidence: 99%

The influence of dynamic swash plate vibration on outlet flow ripple in constant power variable-displacement piston pump

Pan

Liang

2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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The vibration of a swash plate is caused by the piston forces and the control actuator acting on the swash plate. An earlier study of the outlet flow ripple of variable-displacement axial piston pumps assumed a fixed swash plate angle; it ignored the influence of swash plate vibration on the outlet flow ripple of the axial piston pump. In this work, a theoretical model of the outlet flow ripple and pressure pulsation was established in a constant power variable-displacement piston pump. The vibration of swash plate, flow leakage, and valve dynamic characteristics are considered in the theoretical model. The computational results of the theoretical model at different external load pressures are verified by comparison with experimental results. The vibration of the swash plate is strongly influenced by both the piston chamber pressure variation and the control actuator mechanism. The study proved the influence of the swash plate vibration on the outlet flow ripple and the pressure pulsation of an axial piston pump. Compared to the case of a fixed swash plate angle, accounting for swash plate vibration is much more suitable for the accurate determination of the outlet flow ripple and pressure pulsation of an axial piston pump. It is also shown that the vibration of the swash plate affects the valve plate design. Accordingly, valve plate optimization based on the theoretical model of the outlet flow ripple was also studied in this work. The amplitude of the instantaneous outlet flow ripple was considered as the optimization objective function. Finally, the optimized design parameters for a constant power variable-displacement swash plate axial piston pump were evaluated.

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“…The recently developed virtual prototyping technology provides an effective tool to overcome this issue. Piston pump manufacturers such as Rexroth [30] and other research institutes [31] have already used the virtual prototype of piston pump for design development and performance improvement.…”

Section: Introductionmentioning

confidence: 99%

A Model-Based Method for Leakage Detection of Piston Pump Under Variable Load Condition

2019

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Hydraulic systems have been widely used in construction machinery, aeronautics, astronautics, automobiles, shipping, and other fields. Piston pumps are power source and core component in the hydraulic system. The detection and assessment of leakage fault in piston pumps is challenging because: 1) piston pump is always subjected to varying loads and operates at variable speeds, and the conventional condition monitoring methods that rely on instantaneous behavior analysis can hardly give reliable prediction to the actual health state of the piston pump and 2) it is not easy to obtain the typical condition monitoring data that can reflect the change of the piston pump in dynamic behavior when it suffers different severity levels of faults under various loading conditions. In order to tackle these issues, a model-based method for leakage detection of piston pump under variable load condition was proposed in this paper. The liquid-solid coupling model of piston pump is developed and verified at first. Then, with the aid of the model, different severity levels of oil leakage faults are simulated. It is found that outlet pressure signals can better indicate the oil leakage of piston pumps in comparison to the casing vibration signals. ''Sub-harmonics'' will appear in the frequency spectra of outlet pressure signals in the presence of oil leakage fault. Finally, the dynamic responses of the piston pump under different loading and structural health conditions are investigated systematically. The results show that external load can significantly influence the dynamic responses of the piston pump and the gradients of the trend lines of total ''sub-harmonic'' energy of outlet pressure provide correct prediction to the presence and growth of the oil leakage fault. Based on the investigation results, a reliable oil leakage detection and assessment method is proposed. INDEX TERMS Piston pump, leakage, liquid-solid coupling model, condition monitoring. WENXIAN YANG received the Ph.D. degree in mechanical engineering from Xi'an Jiaotong University, in 1999. Then, he did research in the

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Experimental and numerical studies on erosion damage in damping holes on the valve plate of an axial piston pump

Cited by 21 publications

References 13 publications

Investigation of the Tribological Properties of Different Textured Lead Bronze Coatings under Severe Load Conditions

Investigation of the Tribological Properties of Different Textured Lead Bronze Coatings under Severe Load Conditions

The influence of dynamic swash plate vibration on outlet flow ripple in constant power variable-displacement piston pump

A Model-Based Method for Leakage Detection of Piston Pump Under Variable Load Condition

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