A control system for preventing cavitation of centrifugal pumps

Cucit, Valentino; Burlon, Fabio; Fenu, Gianfranco; Furlanetto, Riccardo; Pellegrino, Felice Andrea; Simonato, Michele

doi:10.1016/j.egypro.2018.08.074

Cited by 15 publications

(9 citation statements)

References 11 publications

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“…Hence, the meter-in pressure P a of extension working mode and the meter-in pressure P b of retraction working mode can be calculated by the Equations ( 17) and (21). It is clear that the parameters R, A a , A b and ∆P are constant values.…”

Section: Hpcimsmentioning

confidence: 99%

“…In the retraction working mode, if the rod chamber pressure P b which is the meter-in pressure, is greater than the negative atmospheric pressure −P at , the equations of the meterout pressure P a and the meter-in pressure P b of the CLSS with retraction working mode can be calculated by Equations (20) and (21). It is different from the HPCIMS; the ratio µ is fixed, which is depending on the control valve.…”

Section: Parameters Settingmentioning

confidence: 99%

“…The meter-in pressure P a of extension working mode can be calculated by Equation (17). The meter-in pressure P b of working retraction mode can be calculated by Equation (21). From the two equations, it is clear that the parameters µ, R, A a , A b , and ∆P are constant.…”

Section: Parameters Settingmentioning

confidence: 99%

“…As well known, the cavitation phenomenon takes place due to local evaporation of the fluid caused by a lowering of the pressure. If the pressure falls below the vapor pressure of the fluid, the steam bubble is created, and the bubbles reach regions of higher pressure, it will be generated pressure waves and caused erosion [21]. The cavitation may occur in the pumps, valves, actuators, and pipes of the hydraulic system, and it will result in severe damage to the hydraulic components and the whole hydraulic system [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

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Cavitation Prevention Potential of Hydromechanical Pressure Compensation Independent Metering System with External Active Load

et al. 2021

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This article studies the cavitation performance and preventing method of the hydromechanical pressure compensation independent metering system (HPCIMS). Compared with the conventional load sensing system (CLSS), the meter-in and meter-out orifices of HPCIMS can be regulated independently. A quasi-static behavior analysis of cavitation performance was applied to the HPCIMS and CLSS. The meter-in pressure equation of HPCIMS showed that keeping the ratio of the meter-in and meter-out orifices greater than the minimum value can avoid the cavitation phenomenon. Systems parameters were then kept as constant, and the key parameters related to cavitation performance of the two systems were compared by varying external force. Comparison results show that the cavitation phenomenon in the meter-in chamber of CLSS with the external active load is inevitable, but in HPCIMS, it can prevent the cavitation phenomenon by changing the ratio of the meter-in and meter-out orifices, so the HPCIMS has the cavitation prevention potential.

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Section: Hpcimsmentioning

confidence: 99%

Section: Parameters Settingmentioning

confidence: 99%

Section: Parameters Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cavitation Prevention Potential of Hydromechanical Pressure Compensation Independent Metering System with External Active Load

et al. 2021

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“…(Zhu et al, 2016) investigated the cavitation performance in a centrifugal pump in nuclear power system. The results have shown that when the inlet pressure decreases the cavitation occurrence increases and the inception of cavitation was happened at NPSH values lower than the 7.8 m. (Cucit et al, 2018) tried to control occurrence of cavitation by controlling the rotational speed of a pump. They reported that the inception of cavitation occurs in the pump at NPSH of 3 m. In another work, (Li and Zhang, 2018) suggested a relationships between the NPSHA and performance variables of the pump.…”

Section: Test Proceduresmentioning

confidence: 99%

An Experimental Study on Vibration Signatures for Detecting Incipient Cavitation in Centrifugal Pumps Based on Envelope Spectrum Analysis

Al‐Obaidi

Towsyfyan

2019

JAFM

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Vibration signatures have been studied for monitoring the condition of centrifugal pumps by many researchers, however, there is limited published information on the application of vibration analysis to incipient pump cavitation. The paper will review the state of the art in the field and develops an effective signal processing approach based on envelope spectral analysis to close this gap. A purpose-built test rig was employed for recording vibration signals from a centrifugal pump at a wide range of operating conditions. The collected data was then processed using time domain and frequency domain analysis methods. The study has shown that the vibration energy concentrated mainly in the frequency range between 8-15 kHz. At the flow rates less than 300(l/min), i.e. in design flow rate range, the vibration amplitudes remain constant and does not show a notable change by the flow rate increase. However, a notable increase in the vibration level is evident when the flow rate exceeds 300 (l/min). Analysis the result of filtered vibration signatures has revealed that vibration signal parameters: peak value, root mean squared (RMS), crest factor along with vibration spectrum allow development of cavitation (for the flow rates higher than 300 (l/min)) to be diagnosed reliably. However, conventional signal processing methods may not produce a clear separation of the incipient cavitation from the healthy baseline. Therefore, envelope spectrum analysis has been carried out on recorded vibration signatures to detect the onset of cavitation from the baseline and satisfactory results have been perceived.

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Condition Monitoring as a Pathway for Sustainable Operation: A Case Study for Vibration Analysis on Centrifugal Pumps

Mostafa,

Elsakka,

Soliman

et al. 2024

Earth and Environmental Sciences Library

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A control system for preventing cavitation of centrifugal pumps

Cited by 15 publications

References 11 publications

Cavitation Prevention Potential of Hydromechanical Pressure Compensation Independent Metering System with External Active Load

Cavitation Prevention Potential of Hydromechanical Pressure Compensation Independent Metering System with External Active Load

An Experimental Study on Vibration Signatures for Detecting Incipient Cavitation in Centrifugal Pumps Based on Envelope Spectrum Analysis

Condition Monitoring as a Pathway for Sustainable Operation: A Case Study for Vibration Analysis on Centrifugal Pumps

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