Multi-domain simulation and dynamic analysis of the 3D loading and micromotion of continuous-contact helical gear pumps

Zhao, Xinran; Vacca, Andrea

doi:10.1016/j.ymssp.2021.108116

Cited by 10 publications

(5 citation statements)

References 24 publications

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“…FEM is a tool frequently used in research works at the stage of designing new elements. The literature mentions interesting recent research into new pump designs following helicoidal [12][13][14] and involute [15,16] shape, into hydraulic motors [17][18][19], as well as into thermal processes in hydraulic pumps and motors [20,21]. This research on numerical calculations is a development of previous analytical strength calculations presented in the following publications [7,11].…”

Section: Research Scope and Purposementioning

confidence: 99%

FEM Strength Analysis of Circumferential Compensation with Integrated Lips in Gear Pumps

Osiński

Warzyńska

2022

Energies

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Currently, gear pumps are developed with a aim to increase their efficiency, reduce internal leaks, and increase their working pressures. This development direction requires new solutions which would compensate backlash while ensuring an optimal size of the gaps for the entire range of working pressures. One of the solutions intended to meet this demand is to design circumferential compensation with the so-called integrated lips. The presented backlash compensation method is the result of research performed as part of a project named Designing High-Pressure Gear Pumps. The project was granted funding under path A of the Applied Research Program, contract No. PBS3/A6/22/2015. The research works were performed in the Laboratory of Hydraulic Drives and Vibroacoustics of Machines at Wrocław University of Science and Technology, and in cooperation with Hydrotor SA.

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Section: Research Scope and Purposementioning

confidence: 99%

FEM Strength Analysis of Circumferential Compensation with Integrated Lips in Gear Pumps

Osiński

Warzyńska

2022

Energies

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“…Typically, gear pumps use rotating gears to vary the amount of fluid medium being delivered. Due to the advantages of robustness, stability, and low costs, gear pumps are often used as fuel transfer equipment in the chemical and aerospace industries [1][2][3]. In the aerospace industry, gear pumps are used as key fuel pumps in fuel transportation systems, mainly utilized to pump fuel to aircraft engine fuel systems [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Rotation Speed on the Internal Flow Characteristics of an Aircraft Fuel Gear Pump

Xu,

Liu,

Zhu

et al. 2024

Processes

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A gear pump is a key rotary-displacement pump for aircraft fuel transportation in the aerospace industry. Due to the great ratio of power-to-weight condition demanded for gear pumps in aircraft fuel transportation systems, the parameter of the rotation speed is a matter of extreme concern affecting internal flow characteristics that determines the adverse effects of cavitation, fuel trapping, and vibration. However, the flow characteristics of an aircraft fuel gear pump influenced by the rotation speed have not been elaborated upon on yet. In this research, the flow characteristics of an aircraft fuel gear pump were studied by considering the influence of the rotation speed. An experiment for testing the external performance of an aircraft fuel gear pump was performed, and a corresponding numerical simulation of a gas–liquid two-phase flow was employed. Distributions of the velocity and pressure at the central cross-sections and their monitored transient developments were comparatively analyzed for different rotation speeds. It was found that a greater pressure oscillational amplitude accompanied by a higher frequency could be induced by a higher rotation speed, especially in the region of gear engagement. Additionally, cavitation evolution characteristics affected by the rotation speed in the fuel gear pump were discussed. The mechanism of cavitation generation in the region of gear engagement to withdrawal was revealed to be the quick release of a great amount of pressure. Furthermore, a dimensionless cavitation area was employed to quantify the periodic cavitation evolution, and the natural exponential development of the maximum dimensionless cavitation area with the rotation speed was determined through curve fitting. This study should be helpful for creating a deeper understanding of the internal flow characteristics of an aircraft fuel gear pump in scientific research and the external performance in aerospace industrial applications.

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“…Several studies have been conducted for developing simulation models of external gear pumps. Recent study topics have focused on the accurate evaluation of the mechanical-hydraulic efficiency [17,18], the gears' micromotion [19], the proper design of the balance plates [20], a comparison between the 0D and 3D modelling approach [21], and a comparison between different 3D methodologies [22]. A new challenge is the use of fixed-displacement pumps in applications with variable-speed electric motors.…”

Section: Introductionmentioning

confidence: 99%

Simulation and Experimental Activity for the Evaluation of the Filling Capability in External Gear Pumps

Corvaglia,

Rundo,

Bonati

et al. 2023

Fluids

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Partial electrification of hydraulic circuits to achieve energy savings requires an increase in the angular speed of the positive displacement pumps, with the risk of incomplete filling. In this context, the paper focuses on developing a computational fluid dynamics (CFD) model using SimericsMP+ for two external gear pumps, namely helical and spur type gears. The objective of this study is the analysis of the phenomena occurring on the suction side under conditions of incomplete filling at high speeds. Both CFD models have been validated by conducting experimental tests for measuring the flow rate delivered at various inlet pressures and angular speeds. The experimental results confirm the model’s capability to accurately detect the operating conditions at which the delivered flow rate starts to decrease due to the partial filling of the inter-teeth chambers. Furthermore, this paper investigates the effects of certain geometrical modifications to the spur gear pump. Specifically, the influence of the gear’s width-to-diameter ratio is studied, revealing that a lower ratio leads to slightly better filling. Conversely, increasing the inlet port diameter results in no improvement. Based on this study, the modelling approach appears to be accurate enough to serve as design tool for optimizing pumps to improve their filling capability.

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Multi-domain simulation and dynamic analysis of the 3D loading and micromotion of continuous-contact helical gear pumps

Cited by 10 publications

References 24 publications

FEM Strength Analysis of Circumferential Compensation with Integrated Lips in Gear Pumps

FEM Strength Analysis of Circumferential Compensation with Integrated Lips in Gear Pumps

Influence of the Rotation Speed on the Internal Flow Characteristics of an Aircraft Fuel Gear Pump

Simulation and Experimental Activity for the Evaluation of the Filling Capability in External Gear Pumps

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