On the efficiency of the axial piston motor considering piston form deviations

Sadashivappa, K.; Singaperumal, M.; Narayanasamy, K.

doi:10.1016/0957-4158(95)00074-7

Cited by 11 publications

(6 citation statements)

References 9 publications

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“…This leads to material deformations, which again cause a change of local gap heights. Several models were developed by different authors [7], [12], [22], [32], [35] and [48]. Except the work of Zhu et al [48], who has developed a complex model for the gap between piston and cylinder of a combustion engine the mentioned works deals with elastohydrodynamic effects in displacement machines.…”

Section: State Of the Artmentioning

confidence: 99%

Investigation of the Gap Flow in Displacement Machines Considering Elastohydrodynamic Effect

Ivantysynova

Huang

2002

Proceedings of the JFPS International Symposium on Fluid Power

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The design of individual lubricating gaps with their bearing and sealing function mainly determines the loss behaviour, life time, reliability and achievable technical parameters of displacement machines. The gap flow conditions are influenced by the operating parameters, the gap macro geometry, the surface quality and by the chosen surface material. Therefore the determination of the time dependent gap height requires very complex simulation models considering the motion of moveable parts, the interaction between machine parts, the dependency on design and operating parameters and the energy dissipation within the gaps as well as changes of the gap height caused by the flexibility of the applied surface material. This paper introduces a new method for complex gap flow simulation of connected and self-adjusting gaps of axial piston machines, where the model for the piston/cylinder pair was extended to consider elastohydrodynamic effects. The simulation model has been verified with the help of friction force measurements on the piston/cylinder assembly.

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Section: State Of the Artmentioning

confidence: 99%

Investigation of the Gap Flow in Displacement Machines Considering Elastohydrodynamic Effect

Ivantysynova

Huang

2002

Proceedings of the JFPS International Symposium on Fluid Power

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“…This study proved that the swash plate angle may affect the piston pressure at transition zone. Sadashivappa et al 10 stated that by considering the viscous friction and the piston profiles, the mechanical and volumetric efficiencies of HAPM are affected by the piston-form deviations. Tan et al 11 developed mathematical models for instantaneous pressure to investigate the transient cylinder pressure in the radial piston hydraulic motors.…”

Section: Introductionmentioning

confidence: 99%

The distributed parameter model of hydraulic axial piston motor and its application in hydraulic excavator swing system

Gao

Huang

Quan

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part I:

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Hydraulic axial piston motor is one of the fundamental components in hydraulic systems; it is widely used in engineered machine, especially in high-power drive or reciprocating motion, such as hydraulic excavator. For hydraulic axial piston motor efficient planning, in addition designing and controlling are required for system operating safety and efficiency. Simulation delivers an advantage over analytical approaches and allows better understanding of the motor performance. For multi-piston hydraulic motor, one of the simulation methods, distributed parameter model, could analyze the detailed performance in each piston chamber. Therefore, in this study, we investigate the characteristics of hydraulic axial piston motor by setting up a distributed parameter model based on physical prototype, which includes mechanical–hydraulics coupling process. The effects of the dynamic pressure inside the piston chamber, the fluidic compressibility and other related parameters are considered in the coupling process. At the same time, the distributed parameter model of hydraulic axial piston motor was used in the simulation model of hydraulic excavator. The results indicate that in two-way hydraulic axial piston motor, the valve plane should adopt symmetrical structure, and silencing groove set should be put on both ends of the valve plane slots, which could reduce pressure ripple and overshoot in the piston chamber. Furthermore, the torque characteristics are highly affected by the clearance between the piston and the cylinder bore. Through this research, we may have a better understanding about the mechanism of output torque fluctuation in hydraulic axial piston motor, and the pressure ripple and overshoot in the piston chamber due to through-flow area discontinuity between the silencing groove and the ends of the valve plane slots. The model is verified using a nine-piston hydraulic motor in hydraulic excavator.

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“…Meikandan et al (1990Meikandan et al ( , 1994 analyzed the effects of the tapered piston as well as the friction between piston and cylinder bore on the volumetric efficiency and torque characteristic of HAPM. Sadashivappa et al (1996) investigated theoretically and experimentally the effects of piston-form deviations on the mechanical and volumetric efficiency of HAPM, through considering the viscous friction and the piston profiles. This study indicated that friction torque of the motor with three-lobe pistons was smaller than that with cylindrical piston.…”

mentioning

confidence: 99%

Numerical and experimental investigation on torque characteristics of seawater hydraulic axial piston motor for underwater tool system

et al. 2015

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On the efficiency of the axial piston motor considering piston form deviations

Cited by 11 publications

References 9 publications

Investigation of the Gap Flow in Displacement Machines Considering Elastohydrodynamic Effect

Investigation of the Gap Flow in Displacement Machines Considering Elastohydrodynamic Effect

The distributed parameter model of hydraulic axial piston motor and its application in hydraulic excavator swing system

Numerical and experimental investigation on torque characteristics of seawater hydraulic axial piston motor for underwater tool system

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