Abstract：When the gas flows through the seal faces of a dry gas seal, the temperature of the gas film can vary on the faces because the leaked gas is subject to viscous shear, compression and expansion and so on. Taking an air-lubricated spiral groove dry gas seal as the study model, a three dimensional, steady thermal fluid flow simulation is performed with a commercial CFD software. The effects of film thickness, rotational speed, and sealing pressure on gas film temperature distribution are investigated. The results show that the gas film temperature varies in the radial and circumferential directions, and a lower gas film temperature appears near the inlet of the groove. The higher temperature zone shifts to the dam from the land gradually with the increasing film thickness. The thicker the gas film, the lower the average film temperature. The film temperature is significantly affected by rotational speed. As the rotational speed increases, the gas film temperature rises rapidly. However, an increased sealing pressure reduces the film temperature. The main reason for this is that the gradually increased gas leakage takes more heat with it as the pressure becomes high.
产文, 宋鹏云, 毛文元, 焦凤. 螺旋槽干气密封端面气膜温度场的数值分析[J]. 排灌机械工程学报, 2015, 33(5): 422-428.
Chan Wen, Song Pengyun, Mao Wenyuan, Jiao Feng. Numerical analysis of temperature field of gas film in spiral groove dry gas seal. Journal of Drainage and Irrigation Machinery Engin, 2015, 33(5): 422-428.
[1]陈秀琴,朱维兵,王和顺. 干气密封技术研究现状及发展趋势[J]. 液压与气动,2008(2): 52-56. Chen Xiuqin,Zhu Weibing,Wang Heshun. Research status and developing trend of dry gas seal technique[J]. Chinese Hydraulics & Pneumatics, 2008(2): 52-56.(in Chinese)[2]金兴乾,宋鹏云. 泵用干气密封技术及其应用进展[J].机械,2007,34(7): 6-8. Jin Xingqian,Song Pengyun. Developments of dry gas sealing technology for pumps[J]. Machinery,2007,34(7): 6-8.(in Chinese)[3]杨扉,王方.干气密封控制系统应用与发展趋势[J].化工设备与管道,2012,49(6):43-46. Yang Fei,Wang Fang.Applicacion of dry gas seal control system and its development trend[J].Process Equipment & Piping,2012,49(6):43-46.(in Chinese)[4]Qiu Yifan,Khousari M M. Thermohydrodynamic analysis of spiral groove mechanical face seal for liquid applications[J]. Journal of Tribology,2012,134(2): 021703.[5]Blasiak S, Laski P A, Takosoglu J E. Parametric analysis of heat transfer in non-contacting face seals[J]. International Journal of Heat and Mass Transfer,2013,57(1): 22-31.[6]丁雪兴,严如奇,陈金林,等. 接触式机械密封摩擦界面温度分布分形模型[J]. 化工学报,2014,65(11): 4543-4550. Ding Xuexing,Yan Ruqi,Chen Jinlin,et al. Fractal model of temperature distribution of frictional interface in contacting mechanical seals[J]. CIESC Journal,2014,65(11): 4543-4550.(in Chinese)[7]Shahin I, Gadala M, Alqaradawi M,et al. Three dimensional computational study for spiral dry gas seal with constant groove depth and different tapered grooves[J]. Procedia Engineering,2013,68: 205-212.[8]丁雪兴,刘勇,张伟政,等. 螺旋槽干气密封微尺度气膜的温度场计算[J]. 化工学报,2014,65(4): 1353-1358. Ding Xuexing,Liu Yong,Zhang Weizheng,et al. Calculation of temperature field of micro-scale gas film in spiral groove dry gas seal[J]. CIESC Journal,2014,65(4): 1353-1358.(in Chinese)[9]丁雪兴,刘勇,陈宗杰,等. 热耗散变形下螺旋槽干气密封微尺度气膜流动特性研究[J]. 工程力学,2014,31(11): 237-243. Ding Xuexing,Liu Yong,Chen Zongjie,et al. Research on flow characteristics of micro-gas film in the spiral groove dry-gas seal under the thermo-elastic deformation considering the thermal dissipation[J]. Engineering Mechanics,2014,31(11): 237-243.(in Chinese)[10]韩明君,李有堂,苏虹,等. 干气密封螺旋槽内润滑气膜的热力过程[J]. 排灌机械工程学报,2012,30(4):457-462. Han Mingjun,Li Youtang,Su Hong,et al. Thermodynamic process of lubricating gas film in dry gas seals with spiral grooves[J]. Journal of Drainage and Irrigation Machinery Engineering,2012,30(4):457-462.(in Chinese)[11]Wang Hong, Zhu Baoshan, Lin Jianshu, et al. A thermohydrodynamic analysis of dry gas seals for high-temperature gas-cooled reactor[J]. Journal of Tribology,2013,135(2): 021701.[12]李启玉. 螺旋槽端面干气密封的数值模拟分析与优化设计[D]. 上海: 华东理工大学机械与动力工程学院,2007.[13]Gabriel R P. Fundamental of spiral groove noncontacting face seals[J].Lubrication Engineering,1979,35(7): 367-375.[14]陈汇龙,刘志斌,刘彤,等. 基于空化的机械密封槽腔耦合方式研究[J]. 江苏大学学报:自然科学版,2015,36(1): 43-47. Chen Huilong,Liu Zhibin,Liu Tong,et al. Research on coupling style of mechanical seal with spiral groove and micro-pores based on cavitation[J]. Journal of Jiangsu University:Natural Science Edition,2015,36(1): 43-47.(in Chinese)[15]焦凤,邓先和. 矩形自支撑缩放管换热器强化传热的结构优化[J]. 化工学报,2013,64(7): 2376-2385. Jiao Feng,Deng Xianhe. Structural optimization of converging-diverging tube based on heat transfer enhancement for self-support rectangle heat exchanger[J]. CIESC Journal,2013,64(7): 2376-2385.(in Chinese)[16]卡尔L·约斯. Matheson气体数据手册[M]. 第7版.陶鹏万,黄建彬,朱大方,译. 北京: 化学工业出版社, 2003: 870-963.[17]Harmand S,Pellé J,Poncet S,et al. Review of fluid flow and convective heat transfer within rotating disk cavities with impinging jet[J]. International Journal of Thermal Sciences,2013,67: 1-30.[18]Song Pengyun. The effect of real gas on the performance of the spiral groove dry gas seal[C]//Proceedings of the 21st International Conference on Fluid Sealing, Milton Keynes,UK: BHR Group,2011: 79-90.[19]宋鹏云,产文. 螺旋槽干气密封端面摩擦力矩的简化计算[J]. 润滑与密封,2014,39(6): 95-98. Song Pengyun,Chan Wen. A simplified calculation method of the interfacial frictional torque of spiral groove dry gas seal[J]. Lubrication Engineering,2014,39(6): 95-98.(in Chinese)
