We predicted the leakage flow rates of a pressure seal in an actual high-pressure multistage pump. Since the pressure of the actual pump is higher than that of a model pump, accurate prediction of leakage flow rate and rotor dynamic forces for an actual pump is more difficult than that for a model pump. A non-contacting seal is used as a pressure seal to suppress leakage flow for high-pressure multistage pumps. When such pumps are operated at high speed, the fluid force acting on an eccentric rotor may cause vibration instability. For vibration stability analysis, we need to estimate static and dynamic characteristics of the pressure seals, i.e., leakage flow rate and rotor dynamic coefficients. We calculated the characteristics of the pressure seal based on Iwatsubo group’s method. The pressure seal we developed has labyrinth geometry consisting of grooves with different sizes. This method numerically calculates the characteristics of the grooved seal by using a three-control-volume model and a perturbation method. We compared the calculated and measured leakage flow rates. We found that the calculated results quantitatively agreed with the measured one in the actual pump and the characteristics of pressure and velocity for the seal with non-uniform-sized grooves were clarified.
Skip Nav Destination
ASME-JSME-KSME 2011 Joint Fluids Engineering Conference
July 24–29, 2011
Hamamatsu, Japan
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-4440-3
PROCEEDINGS PAPER
Analysis of Static Characteristics of Pressure Seal in Actual High Pressure Pump
Isao Hagiya,
Isao Hagiya
Hitachi, Ltd., Hitachinaka, Ibaraki, Japan
Search for other works by this author on:
Katsutoshi Kobayashi,
Katsutoshi Kobayashi
Hitachi, Ltd., Hitachinaka, Ibaraki, Japan
Search for other works by this author on:
Yoshimasa Chiba,
Yoshimasa Chiba
Hitachi Plant Technologies, Ltd., Tsuchiura, Ibaraki, Japan
Search for other works by this author on:
Tetsuya Yoshida,
Tetsuya Yoshida
Hitachi Plant Technologies, Ltd., Tsuchiura, Ibaraki, Japan
Search for other works by this author on:
Akira Arai
Akira Arai
Hitachi Plant Technologies, Ltd., Tsuchiura, Ibaraki, Japan
Search for other works by this author on:
Isao Hagiya
Hitachi, Ltd., Hitachinaka, Ibaraki, Japan
Katsutoshi Kobayashi
Hitachi, Ltd., Hitachinaka, Ibaraki, Japan
Yoshimasa Chiba
Hitachi Plant Technologies, Ltd., Tsuchiura, Ibaraki, Japan
Tetsuya Yoshida
Hitachi Plant Technologies, Ltd., Tsuchiura, Ibaraki, Japan
Akira Arai
Hitachi Plant Technologies, Ltd., Tsuchiura, Ibaraki, Japan
Paper No:
AJK2011-06081, pp. 429-435; 7 pages
Published Online:
May 25, 2012
Citation
Hagiya, I, Kobayashi, K, Chiba, Y, Yoshida, T, & Arai, A. "Analysis of Static Characteristics of Pressure Seal in Actual High Pressure Pump." Proceedings of the ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D. Hamamatsu, Japan. July 24–29, 2011. pp. 429-435. ASME. https://doi.org/10.1115/AJK2011-06081
Download citation file:
15
Views
Related Proceedings Papers
Related Articles
Rotordynamic Moment on the Backshroud of a Francis Turbine Runner Under Whirling Motion
J. Fluids Eng (July,2010)
Experimental Study on Static and Dynamic Characteristics of Liquid Annular Convergent-Tapered Damper Seals With Honeycomb Roughness Pattern
J. Tribol (July,2003)
Effect of Swirl on Rotordynamic Forces Caused by Front Shroud Pump Leakage
J. Fluids Eng (December,2002)
Related Chapters
Stability and Range
Design and Analysis of Centrifugal Compressors
Introduction I: Role of Engineering Science
Fundamentals of heat Engines: Reciprocating and Gas Turbine Internal Combustion Engines
Introduction
Design of Mechanical Bearings in Cardiac Assist Devices