螺旋槽位置特征对气膜密封性能影响的仿真研究

doi:10.16180/j.cnki.issn1007-7820.2020.06.013

Abstract

Abstract:

In order to effectively select the position of the spiral groove and determine the factors affecting the gas film sealing performance, the influence of the position characteristics of the spiral groove on the performance of the film seal was simulated in this study. With theoretical analysis and ANSYS modeling software, this paper modeled the pressure field model in two states and the two kinds of gas film structure models, including static ring slotting and dynamic ring slotting. On this basis, the static pressure distribution and shear stress distribution under static ring groove and dynamic ring groove structure were studied by FLUENT software simulation, and the influence of different operating parameters on cylindrical gas film sealing performance was further analyzed. The simulation results showed that the gas film model of the static ring groove was slightly better than the gas film model of the dynamic ring groove, and the pressure difference and air viscosity had a significant effect on the gas film sealability.

Key words: spiral groove, sealing performance, pressure field model, static ring groove, dynamic ring slotting

CLC Number:

TP391.9

WAN Xing,LIU Meihong,SUN Junfeng,WANG Xueliang. Simulation Study on Influence of Spiral Groove Position Characteristics on Gas Film Sealing Performance[J].Electronic Science and Technology, 2020, 33(6): 69-73.

Figures/Tables 14

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References 15

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参数	数值
动环半径/mm	58.41
静环半径/mm	58.40
偏心率	0.4
平均气膜厚度h₀/μm	10
密封环宽度/mm	30
槽数	16
槽深/μm	6
槽台宽比	1
螺旋角	30

参数	数值
转速/rpm	10 000
入口压力/MPa	0.313
出口压力/MPa	0.113
工作温度/℃	25
空气粘度/Pa·s	1.1×10^-5

参数	静环开槽	动环开槽
泄露量/kg·s^-1	0.000 145	0.000 139
摩擦转矩/N·m	0.054	1.275
浮升力/N	134.343	129.729
刚度/N·μm^-1	75.421	69.482
漏刚比/×10^-6	1.920	2.000

参数	静环开槽	动环开槽
泄露量/ kg·s^-1	0.000 403	0.000 433
摩擦转矩/N·m	0.051	1.374
浮升力/N	174.771	168.751
刚度/N·μm^-1	84.196	80.759
漏刚比/×10^-6	4.790	5.360

参数	静环开槽	动环开槽
泄露量/ kg·s^-1	0.000 121	0.000 121
摩擦转矩/N·m	0.061	1.455
浮升力/N	166.814	164.786
刚度/N·μm^-1	89.386	84.341
漏刚比/×10^-6	1.350	1.430

Simulation Study on Influence of Spiral Groove Position Characteristics on Gas Film Sealing Performance

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