Effects of gap between impeller and volute tongue on a pressure fluctuation in double-suction pump

Jin, Jeong-Min; Jung, Kuk Jin; Kim, Yo-Hwan; Kim, Youn-Jea

doi:10.1007/s12206-020-2102-3

Cited by 11 publications

(4 citation statements)

References 16 publications

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“…e impeller is the core part of the centrifugal pump, and the impeller blade profile plays a vital role in the fluid flow which will directly impact the performance of centrifugal pumps. At present, there have been many studies on the influence of the impeller parameters on the flow characteristics of centrifugal pumps [11][12][13][14][15][16][17][18][19][20]. Tao et al [21] used the numerical method to study how the blade thickness influenced the flow characteristics in the impeller passages and volute casing.…”

Section: Introductionmentioning

confidence: 99%

Influence of Blade Profiles on Plastic Centrifugal Pump Performance

Zhang

Tang

Zhao

2020

Advances in Materials Science and Engineering

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To study the influence of blade profiles of the plastic centrifugal pump on pump performance, the impeller blade profiles were designed and drawn by the single arc method, double arc method, logarithmic spiral method, and B-spline curve method, respectively, with the known structural parameters.The shape and size of four profiles were drawn, and two-dimensional models and three-dimensional models of four impellers and volute were completed, respectively. The impeller models were printed by 3D printing technology, and the performance experiments of the plastic centrifugal pump were carried out. The numerical simulation of the internal flow field was performed. From the contours of the velocity and pressure, the vapor volume fraction distribution, and fluid-structure interaction analysis of impellers, the impeller drawn by the logarithmic spiral method was better than others. The optimization of the logarithmic spiral method was completed. The impeller inlet and outlet diameters (D1 and D2) and impeller inlet and outlet installation angles (β1 and β2) were taken as control variables, and the total power loss and the minimum NPSHr of the pump were taken as the objective functions. The optimization results were that D1 = 58 mm and D2 = 162 mm and β1 = 17° and β2 = 31°. The hydraulic efficiency was increased by 1.68%.

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Section: Introductionmentioning

confidence: 99%

Influence of Blade Profiles on Plastic Centrifugal Pump Performance

Zhang

Tang

Zhao

2020

Advances in Materials Science and Engineering

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“…기계적 파손의 일반 원인으로 피로, 마모, 부식 3가지를 들 수 있다 (3) . 소방펌프의 설계압력(  )이 0.85 MPa이고 변동압력(  ) 은 벌류트펌프의 압력변동에 관한 기존연구 (4) 에 없으며, 본 연구에서는 Grant and Tabakoff (1973) (5) 이 제 시한 침식률() 식(7)을 적용하였다.…”

Section: 소방펌프의 고장요인 분석unclassified

A Study on Decisional Factors for Service Life of Fire Trucks

Chun¹,

Kim²

2021

Fire Sci. Eng.

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The lifetime of fire trucks depends on their built-in pumps. A fire truck delivers water to the site of a fire accident via its pump that is composed of an impeller and a casing. As its service time increases, the clearance between the two elements increases. This causes leakage in the pump to increase beyond its limit and the pump can no longer fulfill its principal role. In general, fatigue, erosion, and corrosion are considered to be the major mechanisms for pump failure. From this study, it has been observed that fatigue is not the main factor for failure because of the small magnitude of stress it induces. Erosion by particles shows a high erosion rate of the suction area of the impeller. Cavitation, which is a key mechanism of corrosion, is observed at a suction depth of 7 m and is observed to widen at 7.1 m depth. Finally, the lifetime of the fire trucks is found to be affected by the motion of sucking the natural water of ponds, rivers, etc.

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“…In recent years, scholars have studied many volute structures and volute parameter optimization to improve pump performance and reduce unstable flow. Jin et al [8] studied the influence of the gap between the volute tongue and the impeller on the pressure pulsation and the performance of the double suction pump. Results suggested that as the gap increased, the value of the head and the pressure pulsation were reduced, and the efficiency was increased.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Unsteady Pressure Pulsation in New Type Dishwasher Pump with Special Double-Tongue Volute

Zhu

Zhang

et al. 2021

Machines

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A pressure pulsation experiment of a dishwasher pump with a passive rotation double-tongue volute was carried out and compared with the pressure pulsation of a single-tongue volute and a static double-tongue volute. The pressure pulsation of the three volute models was compared and analyzed from two aspects of different impeller speeds and different monitoring points. The frequency domain and time–frequency domain of pressure pulsation were obtained by a Fourier transform and short-time Fourier transform, respectively. The results showed that the average pressure of each monitoring point on the rotating double-tongue volute was the smallest and that on the single-tongue volute was the largest. When the impeller rotates at 3000 rpm, there were eight peaks and valleys in the pressure pulsation time domain curve of the single-tongue volute, while the double-tongue volute was twice that of the single-tongue volute. Under different impeller speeds, the changing trends of pressure pulsation time and frequency domain curves of static and rotating double-tongue volutes at monitoring point p1 are basically the same. Therefore, a volute reference scheme with passive rotation speed is proposed in this study, which can effectively improve the flow pattern and reduce pressure inside the dishwasher pump, and also provide a new idea for rotor–rotor interference to guide the innovation of dishwashers.

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Effects of gap between impeller and volute tongue on a pressure fluctuation in double-suction pump

Cited by 11 publications

References 16 publications

Influence of Blade Profiles on Plastic Centrifugal Pump Performance

Influence of Blade Profiles on Plastic Centrifugal Pump Performance

A Study on Decisional Factors for Service Life of Fire Trucks

Experimental Investigation of Unsteady Pressure Pulsation in New Type Dishwasher Pump with Special Double-Tongue Volute

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