化工学报2016，Vol.67Issue(11)：4762-4770,9.DOI:10.11949/j.issn.0438-1157.20160744
端面锥形参数对锥-孔组合型机械密封性能的影响
Effect of tapered face parameters on performance of cone-pore-combined mechanical seal
摘要
Abstract
A three-dimensional fluid-solid coupling mathematic model of a cone-pore-combined mechanical seal was established by considering interactions of pressure distribution change of fluid film between two end faces and stress deformation of sealing rings. A numerical iteration method was developed to solve the coupling model so as to obtain pressure distribution of the fluid film and surface deformation. The influence of structural parameters of the tapered end face on sealing performance was analyzed at various working conditions. The results showed that diamond-shaped pores created dynamic pressure effect, which produced circular and radial wave deformation at the end faces, and static pressure effect, which changed impact accordingly within the end face region with the increase of taperФand cone width ratioγ. The convergent seal of the tapered end face atФ=5—6 orФ=2—4 andγ=0.8—1.0 should be selected for low pressure and low to medium speed equipment. The convergent seal of the cone end face atФ=2—3 andγ=1.0 orγ=0.2 should be selected for high pressure and high speed equipment. Changing tapered end face structure could effectively modify characteristic parameters of the cone-hole combined mechanical seal and automatically adjust seal performance during operation, which is especially suitable for variable work conditions. In addition, the change of balance coefficientB and film thickness h caused by structure change of the tapered end face could made up defects of small dynamic pressure effect at low speed to achieve large opening force andcould alsowork under largeh so that the flatness and polish requirement for seal end face might be reduced.关键词
数值模拟/流体动力学/端面变形/层流Key words
numerical simulation/hydrodynamics/face mechanical deformation/laminar flow分类
建筑与水利引用本文复制引用
程香平,孟祥铠,彭旭东,张友亮,付远,康林萍..端面锥形参数对锥-孔组合型机械密封性能的影响[J].化工学报,2016,67(11):4762-4770,9.基金项目
国家自然科学基金青年项目(51505203)；国家自然科学基金面上项目(51375449)；江西省科技开发和产业化开发项目(20151BBE51065)；2015年江西省科学院博士启动基金项目(2014-YYB-18，2014-XTPH1-18)。@@@@Foundation item：supported by the Youth Program of the National Natural Science Foundation of China (51505203), the National Natural Science Foundation of China (51375449), the Jiangxi Province Torch Plan Foundation, China (20151BBE51065), the Doctoral Starting up Foundation of Jiangxi Academy of Sciences, China (2014-YYB-18) and Collaborative InnovationFoundation-GSP,China(2014-XTPH1-18) （51505203）
