Thermodynamic characteristics research of a water lubricating axial piston pump

Li, Donglin; Li, Geqiang; Han, Jianhai; Liu, Yinshui; Wu, Defa

doi:10.1177/0954406220916538

Cited by 10 publications

(5 citation statements)

References 18 publications

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“…On the foundation of former research about the temperature distribution, Dirichlet condition is imposed on the inner surface of the shell with a constant temperature of 350 K, which is the maximum value of internal elements. With an ambient temperature of air ranges from 273.15 K to 323.15 K, the radiation heat transfer takes up less than 3% of the general heat dissipation [25]. To put it another way, the method of convection transfers more heat than radiation.…”

Section: Mesh and Boundary Conditionsmentioning

confidence: 99%

Cooling Performance Analysis of Outside Fins of the Closed Circuit Axial Piston Transmission

Yang

Zhang

et al. 2021

Machines

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Realizing conversion between fluid power and mechanical energy, the closed circuit axial piston transmission (CCAPT) plays a vital and indispensable role in miscellaneous industries. The frictional loss and leakage loss inside the system give rise to the inevitable temperature rise. In order to prolong the life of the device, a cooling structure on the outside of the CCAPT is designed for promoting heat dissipation. Based on the relevant heat transfer law and the temperature distribution of internal machinery elements, a spiral fin structure is designed at the shell side. With the help of numerical simulation, the effects of fin height, fin pitch, and fin thickness on the thermal performance are studied. The flow field and temperature field on the outside of the fin structure are obtained as a guidance for enhancing heat dissipation effect. Results indicate that the area of rotating elements tend to accumulate heat, where more attention should be paid for a better cooling effect. In addition to this, a moderate increase of fin height, fin pitch and fin thickness has a positive effect on heat transfer enhancement. The peak value of Nusselt number is obtained with a fin height of 7.5 mm, which is about 2.09 times that of the condition without the fin structure. An increase in fin pitch improves both heat transfer performance and comprehensive performance at the same. When fin pitch is 30 mm, Nusselt numberincreases 104% over the original condition.

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Section: Mesh and Boundary Conditionsmentioning

confidence: 99%

Cooling Performance Analysis of Outside Fins of the Closed Circuit Axial Piston Transmission

Yang

Zhang

et al. 2021

Machines

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“…Wu Kaipeng et al [24] performed numerical simulations of the full cavitation flow field of automotive electronic water pumps at 25 • C, 50 • C, and 70 • C. Li Wei et al [25] studied the cavitation performance of engine-cooling water pumps at different temperatures and found that as the temperature increased from 25 • C to 70 • C, the cavitation area within the impeller expanded. Li Donglin et al [26] developed a thermodynamic model for a water-lubricated axial piston pump. Their calculations indicate that the pump cannot operate normally when the temperature exceeds 90 • C.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Different Working Fluid Temperatures on the Hydraulic Performance of Magnetic Vortex Pumps

Cheng,

Li,

et al. 2024

Water

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Magnetic vortex pumps are characterized by their high performance and zero leakage, and in recent years, they have been applied for the transportation of antifreeze coolant in varying-temperature environments. This paper combines Computational Fluid Dynamics (CFD) with experimental verification to study the external and internal flow characteristics of magnetic vortex pumps when transporting working fluid at different temperatures, considering radial clearance flow. The results indicate that as the temperature of the medium increases, both the pump head and efficiency improve. Specifically, under the design flow rate condition, the pump head increases by 16.7% when transporting a medium at 90 °C compared to ambient-temperature conditions. Conversely, the pump head is only 16.8% of that observed under ambient-temperature conditions when transporting a medium at −30 °C. Analysis of the internal flow field reveals that the changes in pump hydraulic performance at different working fluid temperatures are primarily due to variations in the vorticity of the internal flow field.

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“…[3][4][5][6][7] Due to the high working pressure, the structure of the piston pump is generally adopted, and the suction and discharge of the pump are controlled through the port valves. 8,9 O-rings are usually used as static seals on piston pumps due to their simple structure and low cost. For a static seal ring, its working state is generally more straightforward than that of a dynamic seal ring.…”

Section: Introductionmentioning

confidence: 99%

“…3–7 Due to the high working pressure, the structure of the piston pump is generally adopted, and the suction and discharge of the pump are controlled through the port valves. 8,9…”

Section: Introductionmentioning

confidence: 99%

Dynamic failure analysis of static seals under pressure fluctuation in an ultrahigh-pressure water piston pump

Cheng

Liu

Wang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

Self Cite

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For ultrahigh-pressure piston pumps, in the reciprocating action of the piston, the fretting between the static face seal and the mating surface occurs with the change of the pressure in the piston chamber. This phenomenon will seriously affect the service life of the seal ring and lead to the failure of the pump. However, the failure of static seals used to seal ultrahigh-pressures is usually studied from the directions of shear, stress, or rubber material. These studies cannot explain the failure phenomenon of the sealing ring found in our experiment. This paper analyzed the failure of the face seal ring in a piston pump with a maximum pressure of 120 MPa. A two-dimensional axisymmetric finite element model was established based on the Mooney-Rivlin constitutive relation of the rubber material, and the fretting conditions of the sealing ring were analyzed. Combined with the wear scars observed by the scanning electron microscope the face seal ring’s dynamic failure mechanism on the ultrahigh-pressure piston pump was determined. A better sealing scheme was proposed and verified by the duration test of the pump, which provided a basis for the design of the sealing of the ultrahigh-pressure fluid with high-frequency fluctuations.

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Thermodynamic characteristics research of a water lubricating axial piston pump

Cited by 10 publications

References 18 publications

Cooling Performance Analysis of Outside Fins of the Closed Circuit Axial Piston Transmission

Cooling Performance Analysis of Outside Fins of the Closed Circuit Axial Piston Transmission

The Influence of Different Working Fluid Temperatures on the Hydraulic Performance of Magnetic Vortex Pumps

Dynamic failure analysis of static seals under pressure fluctuation in an ultrahigh-pressure water piston pump

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