锥-孔组合型机械密封端面变形及密封性能分析  

End Face Deformation and Sealing Performance Analysis of Cone-hole Combination Mechanical Seal

作　　者：程香平[1] 刘小红[1] 张友亮[1] 康林萍[1] 

机构地区：[1]江西省科学院应用物理研究所,南昌330029

出　　处：《江西科学》2016年第3期357-363,共7页Jiangxi Science

基　　金：国家青年科学基金项目(51505203);江西省科技开发和产业化开发项目--火炬计划项目(20151BBE51065);2015年江西省科学院博士启动基金项目(2014-YYB-18和2014-XTPH1-18)

摘　　要：提出新型的锥-孔组合型端面机械密封,考虑液膜压场的变化规律与密封环受力变形的相互作用关系,构建了机械密封的3D流、固耦合数学模型,并给出相关的数值计算方法,获得了端面间膜压分布规律及端面变形情况,分析γ在高、低压工况下对密封性能的影响规律。结果表明:由菱形孔所引起的动压效应可使端面产生周向和径向波状变形,而静压效应随着γ的变化,在端面区域范围内所起作用也发生相应变化;对于压强较低和中等转速的设备,应优先选用γ=0的非锥度端面。对于较高压强和转速的设备,应优先选用γ=1或γ=0.2的收敛锥度密封端面。A new cone-hole combination mechanical seal is presented. A three-dimensional fluid-solid coupling mathematic model of the mechanical seal is established,considering their interaction relations of the film pressure distribution between two end faces and sealing rings stress deformation. And a numerical iteration method is used to solve coupling model,then the fluid film pressure distribution between two end faces and surface deformation are attained. The influence law of the γ on sealing performance is analyzed under high and low pressure conditions. The results showed that： the dynamic pressure effect caused by the diamond pores can make the end faces produce axial and radial wave deformation. With the increase of γ,the static effect role changes accordingly within the scope of end faces region. The non-taper end face shall be selected firstly for the low pressure and medium speed device,then the convergence taper seal end faces of γ = 1 or γ = 0. 2 should be chose firstly for the higher pressure and rotational speed equipment.

关 键 词：机械密封 菱形孔 锥面 力变形 

分 类 号：TH136[机械工程—机械制造及自动化]