Influence of compressibility of working fluid on hydrodynamic processes in the axial piston pump with combined distribution/flow of working fluid

Petrović, Radovan; Pezdirnik, Joze; Banaszek, A.; Duricic, Ljubisa

doi:10.1109/fpm.2011.6045784

Cited by 5 publications

(4 citation statements)

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“…The pressure on the inflow of the distributor is fixed by the set of the ruff 3 and the relief valve 5, fulfilling the adjustment of the pressure controller rule pstr. The pressure this affecting the slider shaft in the extreme area of the distributor together with the spring 6 causes such steering of the master distributor 2 that the shaft of the master servo motor 1 will bend the resisting disk of the pump up to here, till the pressure generated by the pump will not draw up with the adjusted value of the pressure on the relief master valve controlled of a adjustment of the regulator [10,15]. However, in practice on ships deck, when we use the large power pump, very seldom we have a situation in which the operator of pump system possesses the possibility of measurement of the real pump driving moment, the rotational speed, even the flow of the pump.…”

Section: Pressure Constant Pump Regulatormentioning

confidence: 99%

Problem of Non Proportional Flow of Hydraulic Pumps Working with Constant Pressure Regulators in Big Power Multipump Power Pack Unit in Open System

2019

Teh. vjesn.

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The non-proportional flow problem of hydraulic pumps with constant pressure regulator in case of simultaneous work in Power Pack Unit with advanced multipump structure in open supply system is presented in the paper. Main parts of hydraulic power pack unit with multipump structure, mounted on board of modern product and chemical tankers and pump constant pressure regulator DP type, are described. Coefficients of non-proportional pump flow phenomena are defined. Analysis of nonproportional flow problem referring to four hydraulic axial piston pumps simultaneously working with pressure constant regulator in Power Pack Unit in open system is presented. The idea of non-proportional pump flow phenomenon reduction is discussed. Conclusions are presented.

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Section: Pressure Constant Pump Regulatormentioning

confidence: 99%

Problem of Non Proportional Flow of Hydraulic Pumps Working with Constant Pressure Regulators in Big Power Multipump Power Pack Unit in Open System

2019

Teh. vjesn.

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“…Wang et al [20] proposed a deformation compensation method based on higher-order convergence to solve the machining errors caused by deformation in the end-milling process of large thin-walled parts and verified the effectiveness of the method through experiments. In addition, other factors can also have an impact on torque pulsation, such as the elastic modulus of the oil [21]. But this study focuses on curve pre-compensation for stroke ring deformation to optimize the output stability of hydraulic motors.…”

Section: Introductionmentioning

confidence: 99%

Design Method of the Stroke Ring Based on Deformation Pre-Compensation

An,

Gao,

Dong

et al. 2024

Actuators

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A common consensus is that an optimized curve profile of the stroke ring in the multiple-stroke piston motor can make the output torque more stable. However, the ring generates elastic deformation during operation, which causes the piston component movement trajectory to deviate from the ideal design curve. To address this issue, first, a liquid–solid coupling simulation model was established to obtain the deformation of the ring, and the accuracy of the model was verified through experiments. Second, a stroke ring curve design method based on elastic deformation pre-compensation was proposed. Through this method, a compensated curve can be obtained to make the actual working curve more in line with the ideal curve. Finally, the dynamic characteristics of three different types of multiple-stroke piston motor curves were analyzed—the ideal design curve, the uncompensated working curve, and the compensated working curve. The results showed that the motor torque pulsation rates are 0.821%, 4.723%, and 0.986%, respectively, and the compensated working curve has a relatively reduced pulsation rate of 79.12% compared to the uncompensated working curve, which verifies that this design method can effectively improve motor performance.

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“…Borisova et al [2] studied the effect of a screw pump rotor on its pressure inertial force. Radovan [3] and others scholars performed experimental works combined with the mathematical modeling in the optimization analysis of the axial piston pump to conduct optimization analyses. Todić [4] and others carried out mathematical modeling on water hydraulic axial piston pump fluid dynamic processes using instruction pump parameter optimizations.…”

Section: Introductionmentioning

confidence: 99%

Influence of Different Reflux Groove Structures on the Flow Characteristics of the Roots Pump

Xing

Zhang²,

Fang³

et al. 2022

Machines

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A Roots pump often exhibits the typical characteristics of high gas pressure in the exhaust port, low pressure at a basic volume and large airflow pulsation at the outlet as a result of gas reflux. In light of this, this study employed Pumplinx software for the numerical calculation of the entire flow field of a two-bladed Roots pump. The effects of the rectangular and curved reflux groove structures on the internal flow field of a Roots pump, especially on the outlet pressure pulsation and flow rate, were unveiled separately. The rectangular reflux groove controlled the angle and thickness, while the curved reflux groove regulated the coordinates of the key points on the Bezier curve. It is worth recognizing that different reflux groove structures were not noticeable in enhancing the inlet measurement flow pattern; reduce the exhaust pressure pulsation, flow pulsation and exhaust section vortex. Interestingly, the rectangular return groove far outweighed the curved groove when optimizing the pressure and flow pulsation when registering the higher flow loss compared to the curved return groove. The merits and demerits of the Q criterion and omega criterion in characterizing the vortex structure of the flow field in the Roots pump were compared by Tecplot software. The omega criterion looked more robust, clear and continuous in revealing the strong and weak vortices in the Roots pump. The outcome of this research work could provide a reference for the study of Roots pump airflow pulsation, vortex analysis and casing structure design optimization.

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Influence of compressibility of working fluid on hydrodynamic processes in the axial piston pump with combined distribution/flow of working fluid

Cited by 5 publications

References 0 publications

Problem of Non Proportional Flow of Hydraulic Pumps Working with Constant Pressure Regulators in Big Power Multipump Power Pack Unit in Open System

Problem of Non Proportional Flow of Hydraulic Pumps Working with Constant Pressure Regulators in Big Power Multipump Power Pack Unit in Open System

Design Method of the Stroke Ring Based on Deformation Pre-Compensation

Influence of Different Reflux Groove Structures on the Flow Characteristics of the Roots Pump

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