Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
권호 표지
DOI QR코드

DOI QR Code

Transient analysis of lubrication with a squeeze film effect due to the loading rate at the interface of a motor operated valve assembly in nuclear power plants

  • Jaehyung Kim (Department of Nuclear Equipment Qualification & Safety, Korea Institute of Machinery & Materials) ;
  • Sang Hyuk Lee (Department of Nuclear Equipment Qualification & Safety, Korea Institute of Machinery & Materials) ;
  • Sang Kyo Kim (Department of Nuclear Equipment Qualification & Safety, Korea Institute of Machinery & Materials)
  • Received : 2022.08.27
  • Accepted : 2023.02.04
  • Published : 2023.08.25
Download PDF
⟨ Previous Next ⟩

Abstract

The valve assembly used in nuclear power plants is important safety-related equipment. In the new standard, the physical attributes are measured using a valve diagnosis test, which is used in the expansion to other non-tested valves using a quantitative test-basis methodology. With a motor-operated actuator, the state of stem's lubrication is related to physical attributes such as the stem factor and the friction coefficient. This study analyzed the numerical transient of fluid and solid lubrication with a squeeze film effect due to the loading rate on the stem and the stem nut using the experimental data. The differential equation that governs the motion mechanism of the stem and stem nut is established and analyzed. The flow rate, the fluid and the solid contact forces are calculated with the friction coefficient. Finally, we found that a change in the friction coefficient results from a change of the shear force in the solid contact mode during the interchange process between the solid contact mode and the fluid contact mode. The qualitative understanding of the squeeze film effect is expanded quantitatively for forces, thread surface distance, velocity, and acceleration, with consideration of the metal solid contact and fluid contact.

Keywords

Acknowledgement

This work is supported by Energy Research and Development Project (A Research and Development on Localization of Electric Actuator for valves and Dampers, dedicated to safety Class(Q-Class, Class-1E)).

References

  1. IEEE Std. 382-1996, IEEE Standard for Qualification of Actuators for Power-Operated Valve Assemblies with Safety-Related Functions for Nuclear Power Plants, Nuclear Power Engineering Committee of the IEEE Power Engineering Society (Institute of Electrical and Electronics Engineers), USA, 1996.
  2. ASME QME-1a-1998/2002, Qualification of Active Mechanical Equipment Used in Nuclear Power Plants, The American Society of Mechanical Engineers, 1998.
  3. ASME QME-1 2007, Qualification of Active Mechanical Equipment Used in Nuclear Power Plants, The American Society of Mechanical Engineers, 2007.
  4. Jaehyung Kim, San Hyuk Lee, Jung Hee Lee, A study on contact model of gate valve disk in nuclear power plants, J. Comput. Fluids Eng. 26 (3) (2021) 90-100. https://doi.org/10.6112/kscfe.2021.26.3.090
  5. J. Gleeson, EPRI MOV Performance Prediction Program (Motor-Operator Separate Effects Testing,TR-103256), Electric Power Research Institute, 2008.
  6. L.S. Dorfman, EPRI Motor-Operated Valve Performance Prediction Program (Stem/Stem Nut Lubrication Test Report,TR-102135), Electric Power Research Institute, 1993.
  7. Joseph Edward Shigley, Charles R. Mischke, Mechanical Engineering Design, fifth ed., McGRAW-HILL International Editions, 1989.
  8. Philippe Piteau, Jose Antunes, A theoretical model and experiments on the Nonlinear dynamics of parallel plates subjected to lamina/turbulent squeeze-film forces, J. Fluid Struct. 33 (2012) 1-118. https://doi.org/10.1016/j.jfluidstructs.2012.04.012
  9. G. Satish, Kandlikar, Heat Transfer and Fluid Flow in Minichannels and Microchannels, second ed., 2014, pp. 103-174.
  10. Boris Zhmud, Viscosity blending equations, Lube Magaz. 121 (2014) 23-27.
  11. Nobuyoshi Ohno, Md Ziaur Rahman, Kouichi Kakuda, Bulk modulus of lubricating oils as predominant factor affecting tractional behavior in high-pressure elastohydrodynamic contacts, Tribol. Trans. 48 (2005) 165-170. https://doi.org/10.1080/05698190590923860
  12. Sobahan Mia, Nobuyoshi Ohno, Prediction of pressure-viscosity coefficient of lubricating oils based on sound velocity, Lubric. Sci. 21 (2009) 343-354. https://doi.org/10.1002/ls.96
  13. Hamed kazeml Sharlat Panahi, Mona Dehhaghi, James E. Kinder, Thaddeus Ezeji, A review on green liquid fuels for the transportation sector: a prospect of microbial solutions to climate change, Biofuel Res. J. 6 (3) (2019) 995-1024. https://doi.org/10.18331/BRJ2019.6.3.2
  14. P.N.J. Rasolofosaon, B. Zinszner, Experimental verification of the petroelastic model in the laboratory - fluid substitution and pressure effects, Oil Gas Sci. Technol. 67 (2) (2012) 303-318. https://doi.org/10.2516/ogst/2011167
  15. M.P. F Sutcliffe, Measurements of the rheological properties of a kerosene metal-rolling lubricant, J. Eng. Manuf. 205 (1991) 215-219. https://doi.org/10.1243/PIME_PROC_1991_205_071_02