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

Zhou, Junjie; Zhou, Jia; Jing, Chenchen

doi:10.1186/s10033-020-00441-7

Cited by 15 publications

(11 citation statements)

References 22 publications

(22 reference statements)

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“…The fluid film thickness is set to 20 mm for the piston/cylinder block interface based on the assembly clearance of the test pump, while it is assumed to be 1-30 mm for the cylinder block/valve plate interface and slipper/swash plate interface based on the measurement results. [31][32][33] The assumption of varied film thickness is due to the unrestricted movement of the cylinder block and slippers along their axes. At each operating point, the leakage flow rates for all possible fluid film thicknesses are calculated by the grid search method.…”

Section: Resultsmentioning

confidence: 99%

New analytical leakage models for tribological interfaces in axial piston pumps

Chao

Shao

Liu

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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Axial piston pumps act as the power source in hydraulic systems and their volumetric losses mainly arise from leakage of tribological interfaces. The leakage of tribological interfaces was often modeled as a simple mixture of pressure-induced flow and velocity-induced flow in previous studies. However, few studies have clarified the contribution of discharge pressure and rotational speed to the leakage flow. This work considers both pressure and velocity factors and establishes new analytical models for the leakage of tribological interfaces from Navier-Stokes equations. Experiments were performed on an actual axial piston pump to measure its leakage flow rates at different discharge pressures and rotational speeds. Results show that the total pump leakage excludes Couette flow and only includes Poiseuille and centrifugal flows. The Poiseuille flow predominates the pump leakage while the centrifugal flow contributes little to the pump leakage.

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Section: Resultsmentioning

confidence: 99%

New analytical leakage models for tribological interfaces in axial piston pumps

Chao

Shao

Liu

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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show abstract

“…When working for a long time, the liquid oil condensed dust and waste chips will form solid oil particles, which will adhere to the surface and cause friction and eventually cause parts to be scratched. It will make the piston pump work less smoothly and generate more waste [4], which will eventually cause more serious overall performance degradation.…”

Section: Slipper Pair Distribution Pairmentioning

confidence: 99%

Disassembling Process and Technology of Axial Piston Pump for Remanufacturing

2022

IJOMAM

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In response to the "circular economy" policy of the green environmental protection industry, the remanufacturing of axial piston pumps has been studied in depth. Firstly, the structure and working principle of each component of the axial piston pump are deeply studied, and then each component of the piston pump is regarded as an independent part, the contact and spatial relationship between the components are analysed. The disassembling specifications of remanufacturing must be strictly observed, and the principles of stability, safety and independence must be adhered to. Secondly, the spatial position of each component and the constraint relationship between adjacent components are studied in turn. The constraint matrix is established from the two aspects of space and contact, and the model of the disassembling device is designed according to the principle of priority and stability in the disassembling process. Then a complete disassembling process and the system are built, and the internal cycle procedure of the disassembling device is designed. Finally, through the simulation experiment and analysis of the virtual model of the disassembling device, the feasibility of the design scheme is verified by taking the former pump as an example. The results show that the disassembling effect of the disassembling device is all qualified and all parts are not damaged. It meets the requirements of stability, safety and independence, and the disassembly of various models and parts, which has the advantage of batch operation and can improve the disassembling efficiency and quality. It is ensured that the produced products meet the standard quality and can reduce the manufacturing cost and time, and save natural resources. Therefore, the disassembling device of the axial piston pump will be of great significance.

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“…(11) and Table 2 can be obtained by solving Eqs. (12) and (13), where the respective terms are elaborated in Table 3 with reference to Fig. 4.…”

Section: Modeling Of Pressure Dynamics Inside the Cylindersmentioning

confidence: 99%

A Single Stage Spool Valve for the Pressure Compensator of a Variable Displacement Pump – Design, Dynamic Simulation and Comparative Study With A Real Pump

Mondal¹,

Saha²,

Sanyal³

2021

Preprint

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The study is focused on the design of a simplified spool valve to be incorporated in the pressure compensator of a variable displacement axial piston pump in order to perform a comparative study with a commercial pump having a two stage spool valve in its compensator. The design involves evaluation of the spool size and selection of spring from static equilibrium condition to satisfy cut-in and cut-off pressure. Following the development of dynamic model of the system, a design sensitivity analysis of the spool valve has been carried out through simulation to identify the critical sizes of the parameters, which affect the pump performance. By systematic design, it is possible to have a single stage spool valve controlled pressure compensator that can produce performance of the variable displacement axial piston pump at par with the similar commercially available pump.

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

Cited by 15 publications

References 22 publications

New analytical leakage models for tribological interfaces in axial piston pumps

New analytical leakage models for tribological interfaces in axial piston pumps

Disassembling Process and Technology of Axial Piston Pump for Remanufacturing

A Single Stage Spool Valve for the Pressure Compensator of a Variable Displacement Pump – Design, Dynamic Simulation and Comparative Study With A Real Pump

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