文章摘要
孙星星,孟祥铠,周国忠,彭旭东.交变载荷作用下端面密封热力耦合特性分析[J].润滑与密封,2017,42(8):48-53
交变载荷作用下端面密封热力耦合特性分析
Analysis of Themal mechanical Coupling Characteristics on Seal Faces under Alternative Load Function
  
DOI:10.3969/j.issn.0254-0150.2017.08.009
中文关键词: 单端面机械密封  交变载荷作用  热力耦合  密封性能
英文关键词: single mechanical seals  alternative load function  thermal mechanical coupling  sealing performance
基金项目:浙江省自然科学重点基金项目(LZ15E050002);国家自然科学基金项目(51375449).
作者单位E-mail
孙星星 交变载荷作用下端面密封热力耦合特性分析 xxsun1991@126.com 
孟祥铠   
周国忠   
彭旭东   
摘要点击次数: 35
全文下载次数: 
中文摘要:
      为研究交变载荷和热力变形对端面密封瞬态耦合特性的影响,以烟气脱硫釜用侧入式单端面机械密封为研究对象,考虑流体黏度随温度的变化,建立其热力耦合计算的数学模型并给出详细的求解边界条件,推导弹簧作用力的交变载荷数学表达形式,通过与载荷时间结合的瞬态分析模型,采用Galerkin差分格式对时间域上的雷诺方程和热传导方程进行离散,获得密封端面的接触压力、摩擦扭矩和温度分布等性能参数。结果表明:瞬态分析中各密封性能参数在每一时刻点仍表现出与稳态工况相似的特征,端面局部接触且处于高温区;随时间变化的弹簧比压,改变了密封装置的受力状况,使得密封端面的接触压力、摩擦扭矩、温度等呈现出交变的瞬态特征,且端面温度等热特性出现明显的热迟滞现象。
英文摘要:
      In order to study the effect of alternating load and thermal deformation on transient coupling characteristics of seal face,taking side entry single mechanical seal of stirred kettle used for flue gas desulfurization as the research object,considering the change of fluid viscosity with temperature,a thermal mechanical coupling mathematical model was established and detailed solution boundary conditions were given.The spring force was expressed in the form of alternative load function,combined with the model of time history transient analysis,the Galerkin difference scheme was used to discrete the Reynolds equation and heat conduction equation in time domain,some performance parameters,such as contact pressure,friction torque and temperature distribution,were achieved.The results indicate that the characteristics of seal end faces investigated in the transient analysis are similar to those in the steady analysis in most of computational time,there exists local contact on the seal end faces and it is in the high temperature region.The force loaded on the sealing device is changed by time varying spring ratio pressure,which makes the contact pressure,friction torque and temperature distribution be all alternate and transient,and there is a apparent thermal lag phenomenon for the thermal characteristics such as the face temperature.
查看全文   查看/发表评论  下载PDF阅读器
关闭

分享按钮