Research on Identification Method of Wear Degradation of External Gear Pump Based on Flow Field Analysis

Guo, Rui; Li, Yongtao; Shi, Yindong; Zhao, Jun; Gao, Dianrong

doi:10.3390/s20144058

Cited by 16 publications

(10 citation statements)

References 33 publications

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“…Dorey [4] introduced different parameters depending on the complexity of the model. Leakage and frictional losses are also related to wear degradation, as has lately been identified by Guo et al [5] in a verified method by testing four external gear pumps. Regarding the characterization of the parameters involved in the pulsating behavior of the unit, that is, that define its potential as a noise generator, we can cite the works of Edge and Johnston [6], and Kojima [7], research that led to standardized tests ISO 10767-1:1996 and 2015.…”

Section: Introductionmentioning

confidence: 86%

Model of the Floating Bearing Bushing Movement in an External Gear Pump and the Relation to Its Parameterization

2021

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This article presents the modeling, simulation and experimental validation of the movement of the floating bearing bushing in an external gear pump. As a starting point, a complete pump parameterization was carried out through standard tests, and these parameters were used in a first bond graph model in order to simulate the gear pump behavior. This model was experimentally validated under working conditions in field tests. Then, a sophisticated bond graph model of the movement of the floating bushing was developed from the equations that define its lubrication. Finally, as a result, both models were merged by integrating the dynamics of the floating bushing bearing with the variation of the characteristic parameters (loss coefficients). Finally, the final model was experimentally validated both in laboratory and field tests by assembling the pump in a drilling machine to drive the auxiliary movements. The novelty of this article is the conception and construction of a simple and experimentally validated tool for the study of a gear pump, which relates its macroscopic behavior as a black box (defined by the loss coefficients) to the internal changes of the unit (defined by its internal lubrication).

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Section: Introductionmentioning

confidence: 86%

Model of the Floating Bearing Bushing Movement in an External Gear Pump and the Relation to Its Parameterization

2021

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“…To ensure correct operation of the axial compensation the proper methodology of designing axial compensation must be implemented Sliwinski (2019). Guo et al (2020) investigate the influence of wear on volumetric efficiency. The CFD model with dynamic mesh allows the identification of the instantaneous parameters of the pump.…”

Section: Gaps In External Gear Pumps As a Factor Influencing The Volu...mentioning

confidence: 99%

“…Pump wear is an important aspect addressed by Guo et al (2020). The flow rate is variable in time, as the number of displacement elements is finite.…”

Section: Influence Of Circumferential Gap Size On Volumetric Efficiencymentioning

confidence: 99%

“…These two factors have a significant influence on the extent of the internal leaks. Even a limited increase in the pressure difference or in the gap height causes a significant decrease in the flow rate generated by the gear pump (Borghi et al 2009;Guo et al 2020;Szwemin, Fiebig 2021). Therefore, a precise model of this flow rate and of the volumetric efficiency of the pump necessarily depends on the precise knowledge of the height of the circumferential gap.…”

Section: Influence Of Circumferential Gap Size On Volumetric Efficiencymentioning

confidence: 99%

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An Investigation of the Impact of Pump Deformations on Circumferential Gap Height as a Factor Influencing Volumetric Efficiency of External Gear Pumps

Cieślicki

Karpenko

2022

Transport

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Gear pumps are widely used in transport machines not only in hydraulic drive systems, but also in lubrication and fuel systems. A positive displacement pump converts mechanical energy into pressure energy stored in the liquid, which it transports to the hydraulic cylinder or motor. The efficiency of this process depends on the efficiency of the system components, including the efficiency of the pump, which depends on the amount of internal leakage through the gaps between the high and low pressure sides. The larger the gaps, the lower the volumetric efficiency. This article presents an investigations of impact of pump deformations on circumferential gap height. The article presents a three-dimensional model of an external gear pump using Finite Element Method (FEM) during operating conditions. The model reflects pumping operation at discharge pressures up to 32 MPa and it was validated against strain measurements of pump casing. The simulation results indicate that the pump casing becomes deformed due to pressure, causing a significant increase in the height of the circumferential gap. The increase of the discharge pressure from 8 to 32 MPa causes more than twofold local increase in the height of the circumferential gap. The obtained results indicate that for the correct modelling of the flow generated by gear pumps, it is necessary to consider the change in the size of the gaps resulting from the deformation of the pump.

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“…With regard to tribological assessment, the wear and its degradation state in an external gear pump have been evaluated by Guo et al [12]. The authors proved that the instantaneous flow rate of the gear pump gradually decreases once the wear clearance increases, and presented the degradation characteristics.…”

Section: Introductionmentioning

confidence: 99%

Parameterization, Modeling, and Validation in Real Conditions of an External Gear Pump

2021

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This article presents a methodology for predicting the fluid dynamic behavior of a gear pump over its operating range. Complete pump parameterization was carried out through standard tests, and these parameters were used to create a bond graph model to simulate the behavior of the unit. This model was experimentally validated under working conditions in field tests. To carry this out, the pump was used to drive the auxiliary movements of a drilling machine, and the experimental data were compared with a simulation of the volumetric behavior under the same conditions. This paper aims to describe a method for characterizing any hydrostatic pump as a “black box” model predicting its behavior in any operating condition. The novelty of this method is based on the correspondence between the variation of the parameters and the internal changes of the unit when working in real conditions, that is, outside a test bench.

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Research on Identification Method of Wear Degradation of External Gear Pump Based on Flow Field Analysis

Cited by 16 publications

References 33 publications

Model of the Floating Bearing Bushing Movement in an External Gear Pump and the Relation to Its Parameterization

Model of the Floating Bearing Bushing Movement in an External Gear Pump and the Relation to Its Parameterization

An Investigation of the Impact of Pump Deformations on Circumferential Gap Height as a Factor Influencing Volumetric Efficiency of External Gear Pumps

Parameterization, Modeling, and Validation in Real Conditions of an External Gear Pump

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