Numerical study on hydrodynamic characteristics of a centrifugal pump influenced by impeller-eccentric effect

Yu, Tao; Shuai, Zhi-Jun; Jian, Jie; Wang, Xi; Ren, Ke-Xin; Dong, Lieyi; Li, Wanyou; Jiang, Chenxing

doi:10.1016/j.engfailanal.2022.106395

Cited by 16 publications

(3 citation statements)

References 20 publications

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“…Kumar et al utilized sound images for identify centrifugal pump fault based on the deep convolution neural network (CNN) algorithm [27]. Numerical simulations are applied to the research of impeller eccentricity through the hydrodynamic characteristics of centrifugal pumps [28]. Adaptive chirp mode decomposition (ACMD) could be used to integrate with tangent entropy to decompose the vibration signals into different modes for the centrifugal pump impeller fault detect [29].…”

Section: Literature Reviewmentioning

confidence: 99%

Fault identification of centrifugal pump using WGAN-GP method with unbalanced datasets based on kinematics simulation and experimental case

Li,

Chu,

Sun

et al. 2024

Meas. Sci. Technol.

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In practical engineering applications, the accuracy and stability of fault identification for centrifugal pump will be significantly reduced due to unbalanced distribution between normal and fault datasets, i.e., the number of normal working samples is far more than the fault samples. To alleviate this bottleneck issue, this paper explores the fault identification of centrifugal pump based on Wasserstein generative adversarial network with gradient penalty (WGAN-GP) through combining kinematics simulation and experimental case. Specifically, ideal unbalanced vibration datasets from failure patterns such as damaged impeller of centrifugal pump are simulated and collected by prototype ADAMS software, then the unbalanced vibration signals are transformed into 2D grey-scale images. Furtherly, the generated grey-scale image datasets are feed into the original grey-scale image dataset as new datasets for training when the Nash equilibrium of the WGAN-GP model is reached. Eventually, the fault patterns of centrifugal pump are identified using confusion matrix graph. Meanwhile, another public dataset of centrifugal pump is employed for verifying the accuracy of the WGAN-GP model. Results indicate that fault identification accuracies with 95.07% and 98.0% of both kinematics simulation and experimental case are obtained, respectively, and the issues of unbalanced distribution and insufficient dataset can be overcome effectively.

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Section: Literature Reviewmentioning

confidence: 99%

Fault identification of centrifugal pump using WGAN-GP method with unbalanced datasets based on kinematics simulation and experimental case

Li,

Chu,

Sun

et al. 2024

Meas. Sci. Technol.

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“…Zhai L J et al [23] concluded that the radial force of the centrifugal pump during operation would enhance the amplitude of pump vibration. Yu T et al [24] explained the reason of fluid-induced force in the centrifugal pump, which were caused by shaft misalignment. Shadab M et al [25] studied pump impeller shroud trimming and found that radial force on shroud-trimmed impellers were higher than that on closed impellers.…”

Section: Introductionmentioning

confidence: 99%

Research on Radial Force of the Volute Pump with Stay Vanes at Medium-high Specific Speed

Zhang,

Feng,

et al. 2024

J. Phys.: Conf. Ser.

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In this paper, to study unsteady hydraulic excitation characteristics of the impeller in stay vane volute pump, the radial force of that is investigated by vector analysis, time-frequency analysis and unsteady flow field analysis etc. Results show that the radial force distribution on the impeller has a linear relationship with the number of the blade under high flow conditions. Furthermore, the radial force has obvious directivity under low flow conditions. The radial force of the impeller is mainly distributed on the blade and the shroud. Interestingly, it is found that the radial force on the impeller is smaller than the radial force on the blade and shroud respectively, when there are cross peaks between the blade and the shroud. In addition, the results of the unsteady flow field analysis reveal that the radial force distribution of the impeller is unbalanced under low flow conditions. This result is due to the fact that jet wake forms at the impeller outlet and radial vortex leads to rotating stall in the flow channel. This work may provide some theoretical references for the optimal design and stable operation of the stay vane volute pump.

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“…Blade breakage is one of the common faults in centrifugal pumps, and its unstable operation is closely related to flow characteristics such as reflux and pressure pulsation inside the pump [7,8]. Therefore, in order to accurately diagnose blade breakage faults and shorten the maintenance cycle of centrifugal pumps, it is very important and necessary to explore the flow characteristics after faults occur [9].…”

Section: Introductionmentioning

confidence: 99%

Study on Flow Characteristics of a Single Blade Breakage Fault in a Centrifugal Pump

Li,

Huang,

et al. 2023

Processes

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The precise identification of faults in centrifugal pumps is crucial for ensuring their safe and stable operation, given their significance as vital industrial equipment. This article aims to rigorously examine and analyze the flow characteristics of centrifugal pumps under two specific conditions: normal blade operation and a single blade breakage fault. Through systematic comparison and in-depth study, this article sheds light on distinguishing flow patterns exhibited by these pumps under both normal and fault scenarios. Utilizing validated numerical simulation methods, a thorough analysis is conducted to explore the flow condition and energy characteristics of the impeller channel following the breakage of a single blade. Additionally, the article investigates changes in the pressure pulsation characteristics of the pump volute as a result. The numerical simulation results reveal that the head of the centrifugal pump decreases at all flow points when a single blade breaks. However, there is no significant change in efficiency at small flow points. As the flow rate exceeds 0.9Qd, efficiency experiences a substantial decrease. Furthermore, the efficiency decline becomes even more pronounced as the flow rate continues to increase. At 1.5Qd, efficiency plummets by 14.33%. The flow pattern undergoes significant changes as well. The breakage of the blade induces noteworthy secondary flow in adjacent impeller channels, resulting in heightened turbulence dissipation. Additionally, it was observed that blade fracture causes alterations in the main frequency of pressure pulsation within the volute. This is characterized by an increase in shaft passing frequency and a decrease in blade passing frequency. Notably, near the tongue monitoring point, the shaft frequency escalates by over 20 times.

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Numerical study on hydrodynamic characteristics of a centrifugal pump influenced by impeller-eccentric effect

Cited by 16 publications

References 20 publications

Fault identification of centrifugal pump using WGAN-GP method with unbalanced datasets based on kinematics simulation and experimental case

Fault identification of centrifugal pump using WGAN-GP method with unbalanced datasets based on kinematics simulation and experimental case

Research on Radial Force of the Volute Pump with Stay Vanes at Medium-high Specific Speed

Study on Flow Characteristics of a Single Blade Breakage Fault in a Centrifugal Pump

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