Novel three-piston pump design for a slipper test rig

Zhang, Junhui; Chao, Qun; Xu, Bing; Pan, Min; Wang, Qiannan; Chen, Yuan

doi:10.1016/j.apm.2017.07.013

Cited by 28 publications

(17 citation statements)

References 30 publications

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“…Axial piston pumps are widely used in many fields because of their high power density, strong load capacity, and long service life [1][2][3]. Since the invention of axial piston pumps, many designs of their mechanical structure have been innovated by researchers worldwide [4][5][6]. However, these structural designs have not been applied in a breakthrough, as the mechanical efficiency of axial piston pumps is restricted by the three friction pairs of the cylinder block and valve plate, the cylinder block and pistons, and the slippers and swash plate [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Research on the Mechanical Efficiency of High-Speed 2D Piston Pumps

et al. 2020

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Since many studies on axial piston pumps aim at enhancing their high power-weight ratio, many researchers have focused on the generated mechanical losses by the three friction pairs in such pumps and attempted to diminish them through abundant and new structural designs of the pump’s components. In this paper, a high-speed 2D piston pump is introduced and its architecture is specifically described. Afterward, a mathematical model is established to study the pump’s mechanical efficiency, including the mechanical losses caused by the viscosity and stirring oil. Additionally, in this study the influences of the rotational speed, the different load pressures, and the rolling friction coefficient between the cone roller and the guiding rail are considered and discussed. By building a test rig, a series of experiments were carried out to prove that the mechanical efficiency was accurately predicted by this model at low load pressures. However, there was an increasing difference between the test results and the analytical outcomes at high pressures. Nevertheless, it is still reasonable to conclude that the rolling friction coefficient changes as the load pressure increases, which leads to a major decrease in the mechanical efficiency in experiments.

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Section: Introductionmentioning

confidence: 99%

Research on the Mechanical Efficiency of High-Speed 2D Piston Pumps

et al. 2020

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“…The swashplate moment is influenced by the fluid pressure coming from displacement chamber. The pressurized fluid in the displacement chamber exerts an axial fluid force on the piston/slipper assembly and generates a reaction force on the swashplate [34]. According to FIGURE 3, the force exerted on the swashplate can be expressed as follows:…”

Section: B Swashplate Momentmentioning

confidence: 99%

“…So, the instantaneous pressure, P DC can therefore be modelled using a separate lumped parameter approach and is fully determined before the calculation of this model, and considered as a transient boundary condition. This pressure is governed by the following pressure build-up equation [16], [34].…”

Section: −1 12rmentioning

confidence: 99%

The Impact of the Deformation Phenomenon on the Process of Lubricating and Improving the Efficiency Between the Slipper and Swashplate in Axial Piston Machines

et al. 2019

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The process of lubricating a sliding interface between the Slipper and the swashplate in axial piston machines is a major solution for the improvement of its efficiency and performance. This lubrication process is largely influenced by the phenomenon of the thermoelastic and hydrodynamic deformation of the solid-liquid structure on this interface. This paper is mainly based on the study of the causes and processes of deformation, as well as the conditions of improvement of this deformation by the lubrication on the interface slipper/swashplate. For this, a mathematical model detailing the model deformation elastic and hydrodynamic on the slide interface Slipper/swashplate is made. The major parameters in the deformation such as the loads and the oil size are simulated. The energy equation is solved to understand the effect of the temperature on the oil behavior. The Reynold equation is solved to simulate the hydrodynamic pressure between the Slipper and the swashplate. A test rig is specially built to measure the torques and loads, the pressure, the oil height, and the temperature between the Slipper and the swashplate for different input conditions. The comparison between the simulation results and the experimental ones proves the coherence and the precision of the results of this research. Finally, some propositions to improve the performance of the axial piston machines for the lubrication mechanism on the Slipper/swashplate interface are given.

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“…Chao et al [3] presented a review of the test rigs of the slipper bearing in axial piston pump. The test rigs are classified into four groups in this paper: stationary cylinder and swash plate [22], stationary cylinder and rotational swash plate without tilt [23,24], stationary cylinder and rotational swash plate with tilt [25] and stationary swash plate and rotational cylinder [26,27].…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on the Dynamic Lubricating Performance of Slipper/Swash Plate Interface in Axial Piston Pumps

Zhou

Jing

2020

Chin. J. Mech. Eng.

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The interface between the slipper/swash plate is one of the most important frication pairs in axial piston pumps. The test of this interface in a real pump is very challenging. In this paper, a novel pump prototype is designed and a test rig is set up to study the dynamic lubricating performance of the slipper/swash-plate interface in axial piston machines. Such an experimental setup can simulate the operating condition of a real axial piston pump without changing the relative motion relationship of the interfaces. Considering the lubricant oil film thickness as the main measurement parameter, the attitude of the slipper under the conditions of different load pressure, rotation speed and charge pressure are studied experimentally. After the test, the wear state of the swash plate is observed. According to the friction trace on the surface of the swash plate, the prediction for the attitude of the slipper and the zone easy to wear are verified.

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Novel three-piston pump design for a slipper test rig

Cited by 28 publications

References 30 publications

Research on the Mechanical Efficiency of High-Speed 2D Piston Pumps

Research on the Mechanical Efficiency of High-Speed 2D Piston Pumps

The Impact of the Deformation Phenomenon on the Process of Lubricating and Improving the Efficiency Between the Slipper and Swashplate in Axial Piston Machines

Experimental Research on the Dynamic Lubricating Performance of Slipper/Swash Plate Interface in Axial Piston Pumps

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