616 ねじ溝付きシールの静および動特性に関する数値解析

• 長井 啓介

  長岡技術科学大学

• 金子 覚

  長岡技術科学大学工学部

• 田浦 裕生

  長岡技術科学大学工学部

• 渡邊 裕輔

  (株)荏原製作所

書誌事項

タイトル別名

• 616 Numerical Analysis on Static and Dynamic Characteristics of Helically Grooved Seals

抄録

In the present study, the static characteristics (leakage flowrate, static pressure and fluid velocities) and dynamic characteristics (dynamic coefficients and whirl frequency ratio) of the helically grooved seals are numerically investigated for various rotor spinning velocity and groove dimensions. A pressure distribution and fluid velocities are calculated by using Navier-Stokes equation and considering of energy loss as the fluid passed through the grooves. A numerical results show that the leakage flowrate decreases with the increase of the rotor spinning velocity in helically grooved seals, and the tendency becomes more marked with increasing the number of thread grooves and the groove depth. The cross-coupled stiffness coefficient Kc and whirl frequency ratio WFR of the helically grooved seals are smaller than those of the smooth seals. The values of Kc and WFR decrease with increasing the number of thread grooves and groove depth. Those results suggest that the helical grooves contribute to the rotor stability from the viewpoint of suppressing the rotor whirling motion.

収録刊行物

• 機械力学・計測制御講演論文集

  機械力学・計測制御講演論文集 2015 "616-1"-"616-12", 2015-08-25

  一般社団法人日本機械学会

キーワード

• Helically grooved seals
• Number of thread grooves
• Groove depth
• Static and dynamic characteristics
• Leakage flow rate
• Fluid-film pressure distributions
• Flow velocity distributions
• Rotordynamic coefficients
• Whirl frequency ratio

詳細情報

• CRID: 1571698602437506432
• NII論文ID: 110010054295
• NII書誌ID: AA11901770
• ISSN: 13480235
• 本文言語コード: ja
• データソース種別:
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