Theoretical simulation of ripples for different leading-side groove volumes on manifolds in fixed-displacement axial-piston pump

Mandal, Nimai Pada; Saha, Ritabrata; Sanyal, Debarshi Kumar

doi:10.1243/09596518jsce580

Cited by 36 publications

(44 citation statements)

References 5 publications

(12 reference statements)

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“…The latter model is obtained from the inertial model by neglecting the flow transient terms and the variation of the area of the grooves from the inlet to exit with respect to (V g /l g ), along with taking the bulk modulus of oil to be much higher than the dynamic pressure within a volume element. Under these circumstances, equations (7) to (9) simplify to the forms as obtained earlier by Mandal et al [13]. In Figs 5 to 7, the number after the comma in the subscript represents the valve pre-compression angle in degrees.…”

Section: Resultsmentioning

confidence: 76%

“…Equations (1) to (5c) and (8a) to (13) need to be solved simultaneously for predicting the flow dynamics of the system under study.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…However, following Mandal et al [13], a silencing groove has been modelled as a volume separate from its adjoining port. The effect of oil inertia ignored by Mandal et al [13] has been incorporated in a method that is similar to the modelling of Edge and Darling [14]. Also, both compressibility and density of oil have been taken as variable.…”

Section: Introductionmentioning

confidence: 99%

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Effects of flow inertia modelling and valve-plate geometry on swash-plate axial-piston pump performance

Mandal

Saha

Sanyal

2011

Proceedings of the Institution of Mechanical Engineers, Part I:

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The present work aims at developing a methodology for designing a swash-plate axial-piston pump whose barrel kidneys are wider than the bridges separating the kidney ports on the plate. Besides reducing pressure ripples and avoiding cavitation for minimizing the fluid-borne noise, maximization of the pump discharge has also been considered in formulating an objective function to be minimized. A comprehensive mathematical model considering oil compressibility and inertia has been developed and implemented in MATLAB/Simulink for dynamic simulation of the pump flow. The model has been found acceptable by observing a good match between its predictions of mean discharge and delivery pressure and available experimental results. A detailed parametric study has been performed and the optimum angles for the valve-plate pre-compression and the barrel kidneys have been obtained.

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Section: Resultsmentioning

confidence: 76%

“…Equations (1) to (5c) and (8a) to (13) need to be solved simultaneously for predicting the flow dynamics of the system under study.…”

Section: Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of flow inertia modelling and valve-plate geometry on swash-plate axial-piston pump performance

Mandal

Saha

Sanyal

2011

Proceedings of the Institution of Mechanical Engineers, Part I:

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“…Eng. (2018) 31:57 effects on the pressure ripple [8]. The optimal match between the pre-compression angle and cylinderkidney angle was determined based on a parametric analysis at one particular operating pressure level to maximize the outlet flow rate and minimize the pressure ripple [9].…”

Section: Introductionmentioning

confidence: 99%

Noise Reduction of an Axial Piston Pump by Valve Plate Optimization

Zhang

2018

Chin. J. Mech. Eng.

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Current researches mainly focus on the investigations of the valve plate utilizing pressure relief grooves. However, air-release and cavitation can occur near the grooves. The valve plate utilizing damping holes show excellent performance in avoiding air-release and cavitation. This study aims to reduce the noise emitted from an axial piston pump using a novel valve plate utilizing damping holes. A dynamic pump model is developed, in which the fluid properties are carefully modeled to capture the phenomena of air release and cavitation. The causes of different noise sources are investigated using the model. A comprehensive parametric analysis is conducted to enhance the understanding of the effects of the valve plate parameters on the noise sources. A multi-objective genetic algorithm optimization method is proposed to optimize the parameters of valve plate. The amplitudes of the swash plate moment and flow rates in the inlet and outlet ports are defined as the objective functions. The pressure overshoot and undershoot in the piston chamber are limited by properly constraining the highest and lowest pressure values. A comparison of the various noise sources between the original and optimized designs over a wide range of pressure levels shows that the noise sources are reduced at high pressures. The results of the sound pressure level measurements show that the optimized valve plate reduces the noise level by 1.6 dB(A) at the rated working condition. The proposed method is effective in reducing the noise of axial piston pumps and contributes to the development of quieter axial piston machines.

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“…Seeniraj and Ivantysynova optimized valve plate geometry based on multiobjective optimization method considering both noise and efficiency [11]. Mandal et al analyzed the effects of different silence grooves on the flow pulsation of an axial piston pump and optimized the structure parameters based on the parametric analysis [12,13]. However, the noise problem is a systematic behavior.…”

Section: Introductionmentioning

confidence: 99%

A Hybrid Lumped Parameters/Finite Element/Boundary Element Model to Predict the Vibroacoustic Characteristics of an Axial Piston Pump

Zhang

et al. 2017

Shock and Vibration

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Low noise axial piston pumps become the rapid increasing demand in modern hydraulic fluid power systems. This paper proposes a systematic approach to simulate the vibroacoustic characteristics of an axial piston pump using a hybrid lumped parameters/finite element/boundary element (LP/FE/BE) model, and large amount of experimental work was performed to validate the model. The LP model was developed to calculate the excitation forces and was validated by a comparison of outlet flow ripples. The FE model was developed to calculate the vibration of the pump, in which the modeling of main friction pairs using different spring elements was presented in detail, and the FE model was validated using experimental modal analysis and measured vibrations. The BE model was used to calculate the noise emitted from the pump, and a measurement of sound pressure level at representative field points in a hemianechoic chamber was conducted to validate the BE model. Comparisons between the simulated and measured results show that the developed LP/FE/BE model is effective in capturing the vibroacoustic characteristics of the pump. The presented approach can be extended to other types of fluid power components and contributes to the development of quieter fluid power systems.

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Theoretical simulation of ripples for different leading-side groove volumes on manifolds in fixed-displacement axial-piston pump

Cited by 36 publications

References 5 publications

Effects of flow inertia modelling and valve-plate geometry on swash-plate axial-piston pump performance

Effects of flow inertia modelling and valve-plate geometry on swash-plate axial-piston pump performance

Noise Reduction of an Axial Piston Pump by Valve Plate Optimization

A Hybrid Lumped Parameters/Finite Element/Boundary Element Model to Predict the Vibroacoustic Characteristics of an Axial Piston Pump

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