Influence of Cross-Sectional Flow Area of Annular Volute Casing on Transient Characteristics of Ceramic Centrifugal Pump

Chinese Journal of Mechanical Engineering

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[1] 0000 0001 0743 511X, grid.440785.a, National Research Center of Pumps and System Engineering and Technology, Jiangsu University, 212013, Zhenjiang, China;Wuxi Vocational Institute of Arts and Technology, 214206, Wuxi, China;0000 0001 0743 511X, grid.440785.a, National Research Center of Pumps and System Engineering and Technology, Jiangsu University, 212013, Zhenjiang, China;

关键词: Annular volute;    Centrifugal pump;    Cross section;    Transient characteristics;    Pressure pulsation;    Radial force;   

DOI  :  10.1186/s10033-019-0319-9

来源: publisher

【 摘 要 】

The annular volute is typically used in a slurry pump to reduce the collisions between solid particles and the volute tongue and to achieve a better resistance to blocking. However, only limited studies regarding annular volutes are available, and there is no systematic design method for annular volutes. In this study, the influence of volute casing cross-sectional flow area on the hydraulic loss, pressure pulsations, and radial force under varying working conditions in a centrifugal ceramic pump are discussed in detail. Experimental tests were conducted to validate the numerical results. The results indicated that, when the volute casing flow area increases, the hydraulic performance decreases marginally under the rated working conditions, but increases at the off-design points, specifically under large flow condition. However, the volute casing with a larger flow area has a wider high-efficiency region. In addition, the increase in the volute casing flow area will decrease the pressure pulsations in the volute, regardless of the working condition, and decrease the radial force on the shaft, therefore, providing an improved pump operational stability. It is anticipated that this study will be of benefit during the design of annular volutes.

【 授权许可】

CC BY