Hydrodynamic Characteristics of Cylindrical Spiral Grooves for Pump Annular Seals

Yuanzheng Wu; Huilong Chen; Benjamin Bernard Uzoejinwa; Binjuan Zhao; Dong Xu

doi:10.5293/IJFMS.2020.13.2.556

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자료유형: 학술저널

저자정보: Yuanzheng Wu (Nanjing Nari Water Conservancy and Hydropower Technology) Huilong Chen (Jiangsu University) Benjamin Bernard Uzoejinwa (Jiangsu University) Binjuan Zhao (Jiangsu University) Dong Xu (Nanjing Nari Water Conservancy and Hydropower Technology)

저널정보: 한국유체기계학회 International Journal of Fluid Machinery and Systems International Journal of Fluid Machinery and Systems Vol.13 No.2

발행연도: 2020.6

수록면: 556 - 566 (11page)

DOI: 10.5293/IJFMS.2020.13.2.556

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The hydrodynamic characteristics of pump annular seals are closely related to the internal flow characteristics and the pump operation stability. Previous studies of annular seals texture focus on damp rather than stiffness. Here a new spiral groove texture on cylindrical surface of annular seals is proposed. Based on the N-S equations, CFD method considering cavitation is used to simulate the internal flow of the spiral groove annular seals. Eccentricity is ensured by the moving mesh technology. The flow characteristics are studied, and comparatively analyzed with that of the smooth annular seals. Results show that: the spiral groove can generate the dynamic pressure effect and the pumping effect. Obvious changes in the pressure field appear. With eccentricity, the spiral groove can respectively enhance the stiffness, reset force and reduce the offset angle, which indicates that the spiral groove is helpful to acquire better rotor concentricity. The spiral groove also reduces the leakage and has little impact on the frictional torque. The above results demonstrate that the spiral groove is beneficial to improve the hydrodynamic characteristics of the annular seals and the concentricity of the rotor, which also reduces friction and wear.

#Spiral groove #Annular seals #Numerical simulation #Flow characteristics #Eccentricity

참고문헌 (20)

참고문헌 신청

Taylor, G. I. / 1923 / Stability of A Viscous Fluid Contained between Two Rotating Cylinders / Philosophical Transactions of the Royal Society of London 223(718):289~343

Diprima, R. C. / 1964 / The Stability of A Viscous Fluid between Rotating Cylinders with An Axial Flow / Journal of Fluid Mechanics 19(4):528~538

Lomakin. A. A. / 1958 / Calculating of Critical Speed and Securing of Dynamic Stability of High Pressure Pumps with Reference to Forces Arising in Seals Gaps / Energomashinostroenie 4(1):1158

Untaroiu, A. / 2013 / On the Dynamic Properties of Pump Liquid Seals / ASME. J. Fluids Eng 135(5):051104

Uy, R. V. / 1999 / Experimental Measurements of Rotordynamic Forces Caused by Front Shroud Pump Leakage / ASME. J. Fluids Eng 121(3):633~637

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