Lubrication and dynamic characteristics of a cylinder block in an axial piston pump

S. Y. Ahn, Y. C. Rhim, Y. S. Hong

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)

Abstract

Lubrication characteristics between a cylinder block and a valve plate in axial piston pumps play an important role in volumetric efficiency and durability of a hydraulic unit. In this paper, the finite element method is used for the computation of the pressure distribution between a cylinder block and a valve plate of the axial piston pump. Also, the Runge-Kutta method is applied to simulate the dynamics of a cylinder block of three-degrees of freedom motion. From the results of computation, two major conclusions are drawn. One is related to the fluid film characteristics between a cylinder block and a valve plate, and the other is related to the average leakage flow rate which is determined by the pressure gradient and the clearance near the discharge port. To confirm results of numerical simulation of cylinder block dynamics, experiment is conducted using three eddy-current type gap sensors, which are imbedded at the pump housing. Finally, a revised shape of a valve plate is proposed which increases the stability of the cylinder block dynamics and the volumetric efficiency of the pump based on numerical simulation.

Original languageEnglish
Title of host publicationProceedings of the World Tribology Congress III - 2005
Pages223-224
Number of pages2
Publication statusPublished - 2005 Dec 1
Event2005 World Tribology Congress III - Washington, D.C., United States
Duration: 2005 Sep 122005 Sep 16

Other

Other2005 World Tribology Congress III
CountryUnited States
CityWashington, D.C.
Period05/9/1205/9/16

Fingerprint

Cylinder blocks
Reciprocating pumps
Lubrication
Pumps
Runge Kutta methods
Computer simulation
Degrees of freedom (mechanics)
Eddy currents
Pressure gradient
Pressure distribution
Durability
Flow rate
Hydraulics
Finite element method
Fluids
Sensors

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Ahn, S. Y., Rhim, Y. C., & Hong, Y. S. (2005). Lubrication and dynamic characteristics of a cylinder block in an axial piston pump. In Proceedings of the World Tribology Congress III - 2005 (pp. 223-224)
Ahn, S. Y. ; Rhim, Y. C. ; Hong, Y. S. / Lubrication and dynamic characteristics of a cylinder block in an axial piston pump. Proceedings of the World Tribology Congress III - 2005. 2005. pp. 223-224
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Ahn, SY, Rhim, YC & Hong, YS 2005, Lubrication and dynamic characteristics of a cylinder block in an axial piston pump. in Proceedings of the World Tribology Congress III - 2005. pp. 223-224, 2005 World Tribology Congress III, Washington, D.C., United States, 05/9/12.

Lubrication and dynamic characteristics of a cylinder block in an axial piston pump. / Ahn, S. Y.; Rhim, Y. C.; Hong, Y. S.

Proceedings of the World Tribology Congress III - 2005. 2005. p. 223-224.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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N2 - Lubrication characteristics between a cylinder block and a valve plate in axial piston pumps play an important role in volumetric efficiency and durability of a hydraulic unit. In this paper, the finite element method is used for the computation of the pressure distribution between a cylinder block and a valve plate of the axial piston pump. Also, the Runge-Kutta method is applied to simulate the dynamics of a cylinder block of three-degrees of freedom motion. From the results of computation, two major conclusions are drawn. One is related to the fluid film characteristics between a cylinder block and a valve plate, and the other is related to the average leakage flow rate which is determined by the pressure gradient and the clearance near the discharge port. To confirm results of numerical simulation of cylinder block dynamics, experiment is conducted using three eddy-current type gap sensors, which are imbedded at the pump housing. Finally, a revised shape of a valve plate is proposed which increases the stability of the cylinder block dynamics and the volumetric efficiency of the pump based on numerical simulation.

AB - Lubrication characteristics between a cylinder block and a valve plate in axial piston pumps play an important role in volumetric efficiency and durability of a hydraulic unit. In this paper, the finite element method is used for the computation of the pressure distribution between a cylinder block and a valve plate of the axial piston pump. Also, the Runge-Kutta method is applied to simulate the dynamics of a cylinder block of three-degrees of freedom motion. From the results of computation, two major conclusions are drawn. One is related to the fluid film characteristics between a cylinder block and a valve plate, and the other is related to the average leakage flow rate which is determined by the pressure gradient and the clearance near the discharge port. To confirm results of numerical simulation of cylinder block dynamics, experiment is conducted using three eddy-current type gap sensors, which are imbedded at the pump housing. Finally, a revised shape of a valve plate is proposed which increases the stability of the cylinder block dynamics and the volumetric efficiency of the pump based on numerical simulation.

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Ahn SY, Rhim YC, Hong YS. Lubrication and dynamic characteristics of a cylinder block in an axial piston pump. In Proceedings of the World Tribology Congress III - 2005. 2005. p. 223-224