Power loss characteristics analysis of slipper pair in axial piston pump considering thermoelastohydrodynamic deformation

Tang, Hesheng; Ren, Yan; Xiang, Jiawei

doi:10.1002/ls.1479

Cited by 12 publications

(3 citation statements)

References 28 publications

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“…Tang et al [13] established a thermal elastohydrodynamic lubrication model for slipper pairs, obtained the oil film thickness and pressure distribution of slipper pairs, and studied the influence of different working conditions and structural parameters of slipper pairs on the thermal elastohydrodynamic lubrication performance. Further work studied the power loss characteristics of the slipper pair of an axial piston pump considering thermoelastichydrodynamic deformation and optimized the structural parameters of the slipper pair [14]. J. M. Bergada et al [15] established a set of new equations for the pressure distribution, leakage, force, and torque of the seal clearance of the discharge waist groove of the valve plate pair of an axial piston pump, in which the influences of important parameters such as wedge angle, speed, oil film thickness, and silence groove were also considered.…”

Section: Introductionmentioning

confidence: 99%

Study on Temperature Characteristics of Lubrication Film of Valve Plate Pair in Axial Piston Pumps

Zhang,

Ma,

et al. 2024

Applied Sciences

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The film temperature distribution of the valve plate pair in axial piston pumps affects its lubrication, leakage, and friction. In order to investigate the film temperature distribution of the valve plate pair in axial piston pumps, a test platform was constructed including three displacement sensors for the oil film thickness and eleven thermocouples for the film temperature distribution of the valve plate pair. An accurate film shape model of the valve plate pair was built according to the three-point film thickness test data. Based on the film shape model, the film temperature model of the valve plate pair was developed considering the viscous oil temperature characteristics, the energy loss caused by leakage and viscous friction in the film, and the heat conduction among the oil, cylinder block, and valve plate. The influence of different swash plate tilt angles and operating pressures on the valve plate film temperature was studied. The test results indicate that the film temperature of the valve plate pair increases as the working pressure and swash plate tilt angle increase. The theoretical and experimental absolute errors of the film temperature in the circumferential range [−60°, 60°] of the valve plate high-pressure side are less than 3.5 °C. As the swash plate tilt angle varies from 12° to 16° and working pressure from 3 MPa to 7 MPa, the minimum film thickness position and the maximum temperature point move accordingly in the circumferential range [−15°, 5°] of the valve plate pair.

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Section: Introductionmentioning

confidence: 99%

Study on Temperature Characteristics of Lubrication Film of Valve Plate Pair in Axial Piston Pumps

Zhang,

Ma,

et al. 2024

Applied Sciences

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“…Currently, the main focus in the high-power MDP sector is the electrification of axial piston pumps, which has become a hot topic in the industry. Research on piston pumps primarily focuses on four aspects: maintaining stable lubrication of friction pairs [2][3][4] , improving efficiency [5][6][7][8] , reducing cavitation [9][10][11] , and controlling vibration and noise [12][13][14][15][16] . These studies have significantly advanced the overall performance of axial piston pumps.…”

Section: Introductionmentioning

confidence: 99%

Impact of High Pressure on the Volumetric Efficiency in Motor-Driven Two-Dimensional Piston Pumps

Chen,

Hua,

Tong

et al. 2024

Preprint

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The two-dimensional (2D) piston pump utilizes a cam guide-roller two-degree-of-freedom (2DOF) motion mechanism, making it adaptable to a wide range of variable operating conditions and frequent loaded startups in the context of motor-driven systems. Volumetric efficiency, which measures the ratio of actual to theoretical output flow, is vital for optimizing hydraulic pump performance and reducing energy loss. This study established a mathematical model for the 2D piston pump, considering factors like axial internal and external leakage, circumferential leakage, backflow, fluid compressibility, turbulence, and flow coefficients. The model was built using a co-simulation environment integrating AMESim and Simulink. Simulation results showed that volumetric efficiency increases with higher rotational speeds and decreases with higher pressures. High-pressure backflow is a key factor in adversely affecting volumetric efficiency and requires special attention. Experimental validation was conducted across a speed range of 500--3000 r/min and pressure range of 1--28 MPa. The lowest efficiency recorded was 64.81\% at 500 r/min and 28 MPa, with a maximum deviation of 3.28\% from the simulation. At 3000 r/min and 28 MPa, the efficiency was 89.53\%, deviating by 1.69\% from the simulation. The close correspondence between experimental and simulation results validates the model's reliability in predicting volumetric efficiency.

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“…At present, most scholars study the mechanical losses and volume losses of hydraulic pump. [8][9][10][11][12] However, the losses of churning power cannot be ignored with the increase of axial piston pump speed. 13 Therefore, studies on improving the efficiency and the energy losses of the hydraulic pump in engineering vehicles are of great significance.…”

Section: Introductionmentioning

confidence: 99%

Analysis of churning losses distribution of hydraulic pump in engineering vehicles using MPS method

Wei

Gui³

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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The power losses of the hydraulic pump in engineering vehicle include mechanical losses, churning losses, and volume losses. The proportion of churning losses to power losses increases markedly, with the continuous improvement of the rotating speed of the hydraulic pump. The churning losses of the hydraulic pump are calculated by moving particle semi-implicit (MPS) method. It indicates that the inclination angle, speed, and oil content will significantly influence the churning losses. The churning torque and power losses of each rotating part increase with the pump speed. The churning losses of the cylinder block are the largest, followed by the retainer and slippers. The churning losses of pistons and shaft are small. With the decrease of oil volume, the churning losses decrease. With the decrease of the inclined angle of the swashplate, the total churning losses decreases. When the oil content is 70% of the full oil, the churning losses of the hydraulic pump is reduced by 57.4%. It provides guidance for the design of the hydraulic pump of high-power density for engineering vehicles and a new numerical calculation method for churning losses of the hydraulic pump.

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Power loss characteristics analysis of slipper pair in axial piston pump considering thermoelastohydrodynamic deformation

Cited by 12 publications

References 28 publications

Study on Temperature Characteristics of Lubrication Film of Valve Plate Pair in Axial Piston Pumps

Study on Temperature Characteristics of Lubrication Film of Valve Plate Pair in Axial Piston Pumps

Impact of High Pressure on the Volumetric Efficiency in Motor-Driven Two-Dimensional Piston Pumps

Analysis of churning losses distribution of hydraulic pump in engineering vehicles using MPS method

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