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Influence of structural parameters on wavy-tilt-dam hydrodynamic mechanical seal performance in reactor coolant pump

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  • Su, Wen-Tao
  • Li, Yang
  • Wang, Ya-Hui
  • Zhang, Ya-Ning
  • Li, Xiao-Bin
  • Ma, Yu

Abstract

This work analyzes the operation conditions of the wavy-tilt-dam (WTD) mechanical seal under different structural parameters using the DNS method. The pressure difference within the liquid film is considered due to the complicated constructor of the WTD mechanical seal. The effects of the main structural parameters on the mechanical seal are studied, including the film thickness, taper, dam-width ratio, and waviness amplitude. Numerical results show that the increase of base film thickness will increase the leakage rate and decrease the opening force. The larger taper will lead to a higher leakage rate and opening force. As the taper increases, the stiffness increases first and then decreases. As the dam-width ratio increases, the leakage rate, the opening force, and the stiffness will increase correspondingly. The waviness amplitude has a small effect on these three performance parameters. Besides, the comparisons between the Reynolds approximation and the DNS technique show that the Reynolds approximation can be applied to analyze the leakage rate under different thicknesses, small tapers, and large dam-width ratios. The opening force under small thickness, different tapers, and different dam-width ratios can also be considered using the Reynolds approximation. To ensure the safe and stable operation of RCP, the optimal structural parameters can be set as taper β = 600 μrad, dam-width ratio ϖ = 0.2, waviness amplitude α = 0.8, and wavenumber k = 9.

Suggested Citation

  • Su, Wen-Tao & Li, Yang & Wang, Ya-Hui & Zhang, Ya-Ning & Li, Xiao-Bin & Ma, Yu, 2020. "Influence of structural parameters on wavy-tilt-dam hydrodynamic mechanical seal performance in reactor coolant pump," Renewable Energy, Elsevier, vol. 166(C), pages 210-221.
    • Handle: RePEc:eee:renene:v:166:y:2020:i:c:p:210-221
    DOI: 10.1016/j.renene.2020.11.123
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    References listed on IDEAS

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    Cited by:

    1. Amein, Hamza & Akoush, Bassem M. & El-Bakry, M. Medhat & Abubakr, Mohamed & Hassan, Muhammed A., 2022. "Enhancing the energy utilization in parabolic trough concentrators with cracked heat collection elements using a cost-effective rotation mechanism," Renewable Energy, Elsevier, vol. 181(C), pages 250-266.
    2. Huilong Chen & Zepeng Wei & Juncheng Lu & Kai Gui & Yingjian Chen & Qian Cheng & Yanxia Fu & Binjuan Zhao, 2022. "Spiral Groove Parametric Study of Solid Particles Deposition Characteristics in Sealing Lubrication Film," Energies, MDPI, vol. 15(11), pages 1-18, May.

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