螺旋槽干氣密封流場的數(shù)值研究

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中圖分類號：TH117.2 文獻(xiàn)標(biāo)志碼：B

Abstract ： In order to obtain good performance of spiral groove dry gas seal，Reynolds equation and film thickness governing equation are solved by finite diference method based on gas film lubrication theory， and the pressure distribution law of gas film lubrication is obtained. With opening force and leakage rate as evaluation indexes，the effects of rotating ring speed，spiral groove number and spiral groove depth on the gas film lubrication performance of dry gas seal are compared and analyzed，and the calculation model and parameter range with lubrication characteristics are obtained. The results show that the steady-state performance parameters of the dry gas seal are increased with the increase of the rotating ring speed，but the deformation and pressure distribution of the gas film are litle effct. When the number of spiral grooves are 12～16 and the depth of spiral grooves is 4.5～6.5μm ，the dynamic pressure effect caused by pressure gradient is obvious，and good sealing effect can be achieved.

Key words： dry gas seal; spiral groove； finite difference method; sealing performance；gas film lubrication

0引言

干氣密封裝置以其磨損小、壽命高、能耗低等優(yōu)點被廣泛應(yīng)用于旋轉(zhuǎn)機械軸端密封裝置[1-2]。（剩余6441字）