工况参数对机械密封液膜汽化特性及性能的影响

doi:10.3969/j.issn.1004-132X.2021.01.001

Abstract
Figure/Table
References (25)
Related Citation (15)

Download: PDF (15266 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract To study the vaporization characteristics and sealing performance of liquid films for dynamic pressure mechanical seals, a computational model of liquid film vaporization in the sealing gaps was established involving the relationship between saturation temperature of water and pressure, viscotemperature effect and Newtonian fluid internal friction effect. Taking the spiral groove mechanical seal as an example, the influences of working conditions on the liquid film vaporization characteristics and sealing performance were analyzed. The results show that when the temperature of the medium increases, there is a critical temperature value where the average vapor phase volume fraction suddenly increases and the critical temperature value increases as the rotating speed increases. The increase of medium pressure and rotating speed has an inhibiting effect on vaporization. Increasing the rotating speeds tends to reduce the higher degree of vaporization quickly and a sudden change occurs at a certain rotating speed. The abrupt rotating speed may increase with the increasing of medium temperature. The sealing performance is obviously affected by the change of working conditions, especially the rate of change in sealing performance increases rapidly at critical vaporization temperature and abrupt rotating speeds. The liquid film vaporization first occurs in the leeward weir areas of spiral groove and rapidly covers the weir areas and advances to the dam areas with the increasing of medium temperature. With the increasing of rotating speeds, the circumferential distribution of the vapor phase of the lubrication film is more uniform and the high vaporization areas move to the outside diameter side.

Key words： dynamic pressure mechanical seal vaporization characteristic sealing performance operating parameter

PACS:

TH117.2

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	CHEN Huilong
	GUI Kai
	LI Xinwen
	HAN Ting
	XIE Xiaofeng
	LU Juncheng

Cite this article:

CHEN Huilong,GUI Kai,LI Xinwen等. Influences of Operating Parameters on Vaporization Characteristics and Properties of Liquid Films for Mechanical Seals[J]. China Mechanical Engineering, 2021, 32(01): 2-11.

URL:

http://www.cmemo.org.cn/EN/10.3969/j.issn.1004-132X.2021.01.001 OR http://www.cmemo.org.cn/EN/Y2021/V32/I01/2

［1］	厉虹, 白少先. 低压螺旋槽上游泵送气体端面密封零泄漏特性［J］. 润滑与密封, 2017, 42(3):59-64.
	LI Hong, BAI Shaoxian. Performance of Zero-leakage Upstream Pumping Gas Spiral Groove Face Seals Operating at Low Pressure［J］. Lubrication Engineering, 2017, 42(3):59-64.
［2］	王涛，黄伟峰，王玉明. 机械密封液膜汽化问题研究现状与进展［J］. 化工学报，2012,63(11)：3376-3382.
	WANG Tao, HUANG Weifeng, WANG Yuming. Research and Progress of Mechanical Seals Operating with Vaporization Transition［J］. CIESC Journal, 2012, 63(11):3376-3382.
［3］	LEBECK A O. A Mixed Friction Hydrostatic Face Seal Model with Phase Change［J］. Journal of Tribology, 1980, 102(2):133-138.
［4］	HUGHES W F, WINOWICH N S, BIRCHAK M J, et al. Phase Change in Liquid Face Seals［J］. Journal of Tribology, 1978, 100(1):74-80.
［5］	BASU P, HUGHES W F, BEELER R M. Centrifugal Inertia Effects in Two Phase Face Seal Films［J］. Tribology Transactions, 1987, 30(2):177-186.
［6］	BEATTY P A, HUGHES W F. Turbulent Two-phase Flow in Face Shaft Seals［J］. Journal of Tribology, 1987, 109(1):91-99.
［7］	LAU S Y，HUGHES W F，BASU P，et al. A Simplified Model for Two Phase Face Seal Design［J］. Tribology Transactions, 1990, 33(3):315-324.
［8］	YASUNA J A, HUGHES W F. A Continuous Boiling Model for Face Seals［J］. Journal of Tribology, 1990, 112(2):266-274.
［9］	ETSION I, PASCOVICI M D. Hydrodynamic Effects on the Boiling Interface in a Misaligned Two-phase Mechanical Seal:a Qualitative Study［J］.Tribology Transactions, 1996, 39(4):922-928.
［10］	ETSION I, PASCOVICI M D. Phase Change in a Misaligned Mechanical Face Seal［J］. Journal of Tribology, 1996, 118(1):109-115.
［11］	ETSION I, PASCOVICI M D, BURSTEIN L. The Boiling Interface in a Misaligned Two-phase Mechanical Seal［J］. Journal of Tribology, 1997, 119(2):265-272.
［12］	ROUILLON M，BRUNETIERE N. Spiral Groove Face Seal Behavior and Performance in Liquid Lubricated Applications［J］. Tribology Transactions, 2018, 61(6):1048-1056.
［13］	陈汇龙，王彬，任坤腾，等. 空化热效应对上游泵送机械密封润滑性能的影响［J］. 化工学报，2016，67(10)：4334-4343.
	CHEN Huilong, WANG Bin, REN Kunteng, et al. Influence of Cavitation Thermal Effect on Lubrication Properties of Upstream Pumping Mechanical Seal［J］. CIESC Journal, 2016, 67(10):4334-4343.
［14］	CHEN Huilong, WU Qiangbo, XU Cheng, et al. Research on Cavitation Regions of Upstream Pumping Mechanical Seal Based on Dynamic Mesh Technique［J］. Advances in Mechanical Engineering, 2014,2014:821058.
［15］	CHEN Huilong, LI Xinwen, WANG Bin, et al.Influencing Factors on Hydrodynamic Lubrication Failure of Upstream Pumping Mechanical Seal［J］. Journal of Drainage and Irrigation Machinery Engineering, 2018, 36(6):509-516.
［16］	刘欢欢. 低温及液态易汽化介质端面密封性能研究［D］. 北京：北京化工大学，2014.
	LIU Huanhuan. Study on Performance of End Face Seals Using the Condition of Low Temperature and Easily Vaporized Liquid Medium［D］. Beijing:Beijing University of Chemical Technology, 2014.
［17］	蔡纪宁, 史金鑫, 李双喜, 等. 汽液混相机械密封相变半径及影响因素研究［J］. 润滑与密封，2013，38(6)：12-16.
	CAI Jining, SHI Jinxin, LI Shuangxi, et al. Study on Air-Liquid Mixture Mechanical Seal Phase Transition Adius and Its Influencing Factors［J］. Lubrication Engineering, 2013, 38(6):12-16.
［18］	曹恒超, 郝木明, 李振涛, 等. 相变对螺旋槽液膜密封性能的影响［J］. 化工学报，2017，68(8)：3190-3201.
	CAO Hengchao, HAO Muming, LI Zhentao, et al. Effect of Phase Change on Performance of Spiral Groove Liquid Film Seals［J］. CIESC Journal, 2017, 68(8):3190-3201.
［19］	曹恒超, 郝木明, 李振涛, 等. 基于相变效应的内压型螺旋槽液膜密封性能分析［J］. 化工学报，2017，68(9)：3532-3540.
	CAO Hengchao, HAO Muming, LI Zhentao, et al. Performance Analysis of Internal Pressure Type Spiral Groove Liquid Film Seals Based on Phase Changes［J］. CIESC Journal, 2017, 68(9):3532-3540.
［20］	曹恒超, 郝木明, 李振涛, 等. 双列螺旋槽液膜密封相变特性分析［J］. 润滑与密封, 2018, 43(1):15-19.
	CAO Hengchao, HAO Muming, LI Zhentao, et al. Analysis of Phase Change Characteristics of Double Spiral Groove Liquid Film Seals［J］. Lubrication Engineering, 2018, 43(1):15-19.
［21］	夏冬生, 孙昌国，于彦，等.磁致伸缩仪超声空化流的三维非定常数值模拟［J］.中国机械工程,2016,27 (22):3061-3067.
	XIA Dongsheng, SUN Changguo, YU Yan, et al. 3D Unsteady Numerical Smulation of Magnetostriction-induced Ultrasonic Cavitation Flow［J］. China Mechanical Engineering, 2016,27(22):3061-3067.
［22］	于定鹏，王彬，邓卫华，等.燃油汽心泵的数值模拟与试验［J］. 中国机械工程,2015,26(17):2389-2393.
	YU Dingpeng, WANG Bin, DENG Weihua, et al. Numerical Simulation and Experiments of Vapor Core Pump［J］.China Mechanical Engineering, 2015, 26(17):2389-2393.
［23］	WALLIS G B. One-dimensional Two-phase Flow［M］. New York:McGraw-Hill Companies, 1969.
［24］	姜继海, 季天晶, 李运, 等. 液压流体粘温关系研究［J］. 润滑与密封, 1998, 23(5):35-37.
	JIANG Jihai, JI Tianjing, LI Yun, et al. Research on Viscosity-Tempeture Relationship of Hydraulic Oils［J］. Lubrication Engineering, 1998, 23(5):35-37.
［25］	杨丽红，沈航明，宋元明. 温容器放气过程中对流换热模型的研究［J］.中国机械工程,2014, 25(18):2489-2495.
	YANG Lihong, SHEN Hangming, SONG Yuanming. Study on Convection Heat Transfer Model of Isothermal Chamber during Discharge［J］.China Mechanical Engineering, 2014, 25(18):2489-2495.