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

摘要/Abstract

摘要：

为了更有效地进行螺旋槽位置选取及确定气膜密封性能的影响因素,文中对螺旋槽位置特征对气膜密封的性能影响进行仿真研究。通过理论分析以及ANSYS建模软件定义,对两种状态下的压力场模型以及静环开槽和动环开槽两种气膜结构模型进行了建模。在此基础上,利用FLUENT软件仿真研究了静环开槽和动环开槽结构下的静压分布与剪切应力分布情况,并进一步分析了不同操作参数对柱面气膜密封性能的影响。通过仿真结果可以说明,静环开槽的气膜模型要略优于动环开槽的气膜模型,且压差和空气黏度对气膜密封性影响显著。

关键词: 螺旋槽, 密封性能, 压力场模型, 静环开槽, 动环开槽

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

中图分类号:

TP391.9

万幸,刘美红,孙军锋,王学良. 螺旋槽位置特征对气膜密封性能影响的仿真研究[J]. 电子科技, 2020, 33(6): 69-73.

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.

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参考文献 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