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Modeling and performance improvement of the constant power regulator systems in variable displacement axial piston pump.

Park SH, Lee JM, Kim JS - ScientificWorldJournal (2013)

Bottom Line: The validity of the simulation model of the constant power regulator system is verified by comparing simulation results with experiments.The shape modification of the counterbalance piston is proposed to improve the undesirable performance of the mechanical-type constant power regulator.The performance improvement is verified by computer simulation using AMESim software.

View Article: PubMed Central - PubMed

Affiliation: School of Mechanical Engineering, Pusan National University, Jangjeon-dong, Geumjeong-gu, Busan 609-732, Republic of Korea.

ABSTRACT
An irregular performance of a mechanical-type constant power regulator is considered. In order to find the cause of an irregular discharge flow at the cut-off pressure area, modeling and numerical simulations are performed to observe dynamic behavior of internal parts of the constant power regulator system for a swashplate-type axial piston pump. The commercial numerical simulation software AMESim is applied to model the mechanical-type regulator with hydraulic pump and simulate the performance of it. The validity of the simulation model of the constant power regulator system is verified by comparing simulation results with experiments. In order to find the cause of the irregular performance of the mechanical-type constant power regulator system, the behavior of main components such as the spool, sleeve, and counterbalance piston is investigated using computer simulation. The shape modification of the counterbalance piston is proposed to improve the undesirable performance of the mechanical-type constant power regulator. The performance improvement is verified by computer simulation using AMESim software.

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Simulation results of the displacement of the sleeve and spool of the regulator with modified counterbalance shape.
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Related In: Results  -  Collection


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fig27: Simulation results of the displacement of the sleeve and spool of the regulator with modified counterbalance shape.

Mentions: Therefore, we proposed the rounded shape for the edge of the counterbalance piston. The effect of rounded edge is implemented and verified by computer simulation based on the verified AMESim simulation model. Figure 26 shows the simulation results of discharge flow rate in which improved shape of the edge of the counterbalance piston is adopted. Also, the behaviors of the spool and sleeve are presented in Figure 27. As shown in Figures 26 and 27, the maximum amplitude of oscillation of the spool and sleeve is reduced to half, and the irregular discharge flow rate is improved.


Modeling and performance improvement of the constant power regulator systems in variable displacement axial piston pump.

Park SH, Lee JM, Kim JS - ScientificWorldJournal (2013)

Simulation results of the displacement of the sleeve and spool of the regulator with modified counterbalance shape.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3824334&req=5

fig27: Simulation results of the displacement of the sleeve and spool of the regulator with modified counterbalance shape.
Mentions: Therefore, we proposed the rounded shape for the edge of the counterbalance piston. The effect of rounded edge is implemented and verified by computer simulation based on the verified AMESim simulation model. Figure 26 shows the simulation results of discharge flow rate in which improved shape of the edge of the counterbalance piston is adopted. Also, the behaviors of the spool and sleeve are presented in Figure 27. As shown in Figures 26 and 27, the maximum amplitude of oscillation of the spool and sleeve is reduced to half, and the irregular discharge flow rate is improved.

Bottom Line: The validity of the simulation model of the constant power regulator system is verified by comparing simulation results with experiments.The shape modification of the counterbalance piston is proposed to improve the undesirable performance of the mechanical-type constant power regulator.The performance improvement is verified by computer simulation using AMESim software.

View Article: PubMed Central - PubMed

Affiliation: School of Mechanical Engineering, Pusan National University, Jangjeon-dong, Geumjeong-gu, Busan 609-732, Republic of Korea.

ABSTRACT
An irregular performance of a mechanical-type constant power regulator is considered. In order to find the cause of an irregular discharge flow at the cut-off pressure area, modeling and numerical simulations are performed to observe dynamic behavior of internal parts of the constant power regulator system for a swashplate-type axial piston pump. The commercial numerical simulation software AMESim is applied to model the mechanical-type regulator with hydraulic pump and simulate the performance of it. The validity of the simulation model of the constant power regulator system is verified by comparing simulation results with experiments. In order to find the cause of the irregular performance of the mechanical-type constant power regulator system, the behavior of main components such as the spool, sleeve, and counterbalance piston is investigated using computer simulation. The shape modification of the counterbalance piston is proposed to improve the undesirable performance of the mechanical-type constant power regulator. The performance improvement is verified by computer simulation using AMESim software.

Show MeSH
Related in: MedlinePlus