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Research Papers: Flows in Complex Systems

Investigation of the Integrated Model of Side Chamber, Wear-Rings Clearance, and Balancing Holes for Centrifugal Pumps

[+] Author and Article Information
Sen Zhang

School of Aeronautics,
Northwestern Polytechnical University,
127 West Youyi Road,
Beilin District,
Xi'an, Shaanxi 710072, China
e-mail: sen96@mail.nwpu.edu.cn

Huaxing Li

Professor
School of Aeronautics,
Northwestern Polytechnical University,
127 West Youyi Road,
Beilin District,
Xi'an, Shaanxi 710072, China
e-mail: hxli@nwpu.edu.cn

Deke Xi

Professor
School of Aeronautics,
Northwestern Polytechnical University,
127 West Youyi Road,
Beilin District,
Xi'an, Shaanxi 710072, China
e-mail: xideke@nwpu.edu.cn

1Corresponding author.

Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received October 15, 2018; final manuscript received February 27, 2019; published online April 15, 2019. Assoc. Editor: Satoshi Watanabe.

J. Fluids Eng 141(10), 101101 (Apr 15, 2019) (12 pages) Paper No: FE-18-1686; doi: 10.1115/1.4043059 History: Received October 15, 2018; Revised February 27, 2019

The characteristics of radial pressure distribution inside side chamber and leakage flow through balancing holes of centrifugal pumps are very important for accurately predicting the axial thrust produced by a balancing system. Therefore, a rapid and sufficiently accurate calculation method is required. An integrated model describing the characteristics of radial pressure distribution inside side chamber and leakage flow rate through balancing holes was established. In this model, the correction coefficient of liquid pressure at side chamber entrance and the discharge coefficient of balancing holes were obtained by experiment. The IS 80-50-315 type single-suction, single-stage, and cantilevered centrifugal pump with the structure of double wear-rings and balancing holes was employed as a model to investigate the characteristics of internal liquid flow of the balancing system. Under different pump flow rates, pump performance curves, radial pressure distribution inside side chamber, and leakage flow rate through balancing holes were examined with different balancing hole diameters. Afterward, the experimental data were compared with the predicted results. The comparisons showed a reasonable consistency. Consequently, according to detailed pump dimensions and operating conditions, the integrated model in current form is recommended for centrifugal pumps, which have low specific speed and are with balancing systems of double wear-rings and balancing holes. This can be used for the prediction of radial pressure distribution inside side chamber and leakage flow rate through balancing holes and can be used both at the design stage and nondesign stage.

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References

Cao, W. D. , Dai, X. , and Qi, X. , 2015, “Effect of Impeller Reflux Balance Holes on Pressure and Axial Force of Centrifugal Pump,” J. Cent. South Univ., 22(5), pp. 1695–1706. [CrossRef]
Kalinichenko, P. , and Suprun, A. , 2012, “Effective Modes of Axial Balancing of Centrifugal Pump Rotor,” Procedia Eng., 39(6B), pp. 111–118. [CrossRef]
Chen, S. X. , Pan, Z. Y. , Wu, Y. L. , and Zhang, D. Q. , 2012, “Simulation and Experiment of the Effect of Clearance of Impeller Wear-Rings on the Performance of Centrifugal Pump,” IOP Conf. Ser.: Earth Environ. Sci., 15(7), p. 072017. [CrossRef]
Mortazavi, F. , Riasi, A. , and Nourbakhsh, S. A. , 2017, “Numerical Investigation of Back Vane Design and Its Impact on Pump Performance,” ASME J. Fluids Eng., 139(12), p. 121104. [CrossRef]
Shimura, T. , 2012, “Internal Flow and Axial Thrust Balancing of a Rocket Pump,” ASME J. Fluids Eng., 134(4), pp. 145–152. [CrossRef]
Dong, W. , Chu, W. , Li, X. , and Wu, Y. , “Numerical Analysis of the Influences of Balance Hole Diameter on the Flow Characteristics of the Back Chamber of Centrifugal Pump,” ASME Paper No. GT2016-56372.
Li, W. G. , 2013, “Model of Flow in the Side Chambers of an Industrial Centrifugal Pump for Delivering Viscous Oil,” ASME J. Fluids Eng., 135(5), p. 051201. [CrossRef]
Lefor, D. , Kowalski, J. , Kutschelis, B. , Herbers, T. , and Mailach, R. , 2014, “Optimization of Axial Thrust Balancing Swirl Breakers in a Centrifugal Pump Using Stochastic Methods,” ASME Paper No. FEDSM2014-21262.
Liu, Z. L. , Wang, D. W. , Hou, Y. H. , and Ma, X. J. , 2016, “Experiment and Calculation of Fluid Pressure in Pump Chamber and Balance Cavity of Centrifugal Pump,” Trans. Chin. Soc. Agric. Mach., 47(8), pp. 42–47.
Shi, W. D. , Gao, X. F. , Zhang, Q. h. , Zhang, D. S. , and Ye, D. X. , 2017, “Numerical Investigations on Effect of Wear-Ring Clearance on Performance of a Submersible Well Pump,” Adv. Mech. Eng., 9(7), pp. 1–8.
Will, B. C. , Benra, F. K. , and Dohmen, H. J. , 2012, “Investigation of the Flow in the Impeller Side Clearances of a Centrifugal Pump With Volute Casing,” J. Therm. Sci., 21(3), pp. 197–208. [CrossRef]
Li, W. G. , Fei, Z. T. , and Cai, Y. X. , 2004, “Influence of Clearance of Impeller Wear-Rings on Performance of Centrifugal Oil Pump,” Pump Technol., 2004(5), pp. 7–13.
Chen, Y. , Fei, Z. T. , Cai, Y. X. , Yang, R. , and Li, W. G. , 2006, “Effect of the Clearance of Wear-Rings on the Performance of Centrifugal Oil Pump While Handling Water,” Fluid Mach., 34(1), pp. 1–5.
Li, W. G. , 2012, “An Experimental Study on the Effect of Oil Viscosity and Wear-Ring Clearance on the Performance of an Industrial Centrifugal Pump,” ASME J. Fluids Eng., 134(1), p. 014501. [CrossRef]
Rudnev, S. S. , and Melashchenko, V. I. , 1970, “Effect of the Design of the Forward Impeller Seal on the Performance of a Centrifugal Barrel Type Pump,” Chem. Pet. Eng., 6(12), pp. 999–1002. [CrossRef]
Jędral, W. , 1991, “A Method of Computer Calculation of Axial Thrust and Internal Leakage in Centrifugal Pumps,” Bull. Inst. Heat Engine, 1991(75), pp. 3–21. http://www.papers.itc.pw.edu.pl/index.php/JPT/article/view/188
Bruurs, K. A. J. , Esch, B. P. M. V. , Schoot, M. S. V. D. , and Zijden, E. J. J. V. D. , 2017, “Axial Thrust Prediction for a Multi-Stage Centrifugal Pump,” ASME Paper No. FEDSM2017-69283.
Hirano, T. , Guo, Z. , and Kirk, R. G. , 2005, “Application of Computational Fluid Dynamics Analysis for Rotating Machinery—Part II: Labyrinth Seal Analysis,” ASME J. Eng. Gas Turbines Power, 127(4), pp. 820–826. [CrossRef]
Inaguma, Y. , and Nakamura, K. , 2014, “Influence of Leakage Flow Variation on Delivery Pressure Ripple in a Vane Pump,” Proc. Inst. Mech. Eng., Part C, 228(2), pp. 342–357. [CrossRef]
Tam, L. T. , Przekwas, A. J. , Muszynska, A. , Hendricks, R. C. , Braun, M. J. , and Mullen, R. L. , 1987, “Numerical and Analytical Study of Fluid Dynamic Forces in Seals and Bearings,” 11th Biennial Design Engineering Conference on Vibration and Noise, Boston, MA, Sept. 27–30, pp. 112–119.
Liu, Z. L. , Sun, Y. , Wang, D. W. , Hou, Y. H. , and Ma, X. J. , 2015, “Experiment and Calculation Method of Fluid Leakage in Flow Passage of Pump Chamber on Centrifugal Pump,” Trans. Chin. Soc. Agric. Mach., 46(6), pp. 97–101.
Liu, Z. L. , Wang, D. W. , and Liang, S. , 2012, “Fluid Leakage Characteristic Test on Balance Aperture of Centrifugal Pump Impeller,” Trans. Chin. Soc. Agric. Mach., 43(7), pp. 85–88.
Matsumoto, K. , Kurokawa, J. , Matsui, J. , and Imamura, H. , 1999, “Performance Improvement and Peculiar Behavior of Disk Friction and Leakage in Very Low Specific-Speed Pumps,” Nihon Kikai Gakkai Ronbunshu B Hen/Trans. Jpn. Soc. Mech. Eng. Part B, 65(640), pp. 4027–4032.
Liu, S. Y. , and Yan, W. G. , 1998, “Analytical Solution for Laminar Viscous Flow in the Gap Between Two Parallel Rotary Disks,” J. Beijing Inst. Technol., 1998(2), pp. 113–119.
Wen, S. P. , Hu, X. W. , Wang, J. , Ma, X. M. , and Chu, Y. , 2009, “Investigation on Superposed Flow Field in Rotating Disk System With Forced Through Flow,” J. Eng. Thermophys., 30(1), pp. 57–60.
Yan, J. F. , Chen, W. , and Pu, G. R. , 2007, “The Effect of Flow in the Impeller Shroud on the Leakage Rate in a Centrifugal Pump,” J. Rocket Propul., 33(3), pp. 20–25.
Daily, J. W. , and Nece, R. E. , 1960, “Chamber Dimension Effects on Induced Flow and Frictional Resistance of Enclosed Rotating Disks,” ASME J. Basic Eng., 82(1), pp. 217–230. [CrossRef]
Senoo, Y. , and Hayami, H. , 1976, “An Analysis on the Flow in a Casing Induced by a Rotating Disk Using a Four-Layer Flow Model,” ASME J. Fluids Eng., 98(2), pp. 192–198.
Junhu, Y. , Chunlong, W. , and Jinping, L. , 2003, “Mathematical Model of Flow Inside a Centrifugal Pump Casing,” Trans. Chin. Soc. Agric. Mach., 34(6), pp. 68–72.
Li, W. , 2006, Hydraulic Calculation Manual, China Water & Power Press, Beijing, China.
Guan, X. F. , 2011, Modern Pumps Theory and Design, China Aerospace Science and Technology Knowledge Database, Beijing, China.
Luo, X. Q. , 2012, Fluid Mechanics, 3rd ed., China Machine Press, Beijing, China.
Li, W. G. , 1999, “Comparison of Several Empirical Formulas for Hydraulic Efficiency,” Mech. Electr. Technol., 1999(2), pp. 1–4.
He, X. J. , and Lao, X. S. , 2009, “Evaluation of Several Formulas for Centrifugal Pump Efficiency Calculation,” Pump Technol., 2009(6), pp. 16–19.
Liu, Z. L. , He, R. , and Fan, Y. , 2011, “Fluid Leakage Characteristics Test on the Balance Cavity of Floating Impeller,” Trans. Chin. Soc. Agric. Mach., 42(9), pp. 113–115.

Figures

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Fig. 1

Geometric model of side chamber

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Fig. 2

Steady laminar flow of incompressible viscous liquid between two parallel plates

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Fig. 3

Test rig for centrifugal pumps: (a) sketch of rig and (b) photo of rig

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Fig. 4

Sketch of stabilizer tank

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Fig. 5

Test device for liquid pressure and leakage flow rate

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Fig. 6

Performance curves of the experimental pump with balancing hole diameters of 0 mm, 4 mm, 6 mm, 8 mm, and 10 mm, respectively

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Fig. 7

Curves of correction coefficient K3

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Fig. 8

Comparisons of liquid pressure inside side chamber between the experimental data and the theoretical results predicted by the integrated model

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Fig. 9

Curves of discharge coefficient μq

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Fig. 10

Chart for checking discharge coefficient μq

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Fig. 11

Curve of variable a against balancing hole ratio k

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Fig. 12

Experimental curves of leakage flow rate under different pump flow rates with balancing hole diameters of 4 mm, 6 mm, 8 mm, and 10 mm, respectively

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Fig. 13

Comparisons of curves of leakage flow rate among the predictions and the experimental data

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Fig. 14

Comparisons of liquid pressure inside side chamber between the experimental data and the theoretical results predicted by the integrated model for wear-rings clearance of 0.3 mm and balancing hole diameter of 6 mm

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Fig. 15

Comparisons of curves of leakage flow rate among the prediction of the integrated model, the prediction of the method in Ref. [32] and the experimental data for wear-rings clearance of 0.3 mm and balancing hole diameter of 6 mm

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