新型法兰迷宫式静密封几何结构优化设计
|
摘要
针对新型法兰迷宫式静密封,建立了热-流-固耦合数学模型;通过采用有限差分法求解密封圈温度和密封圈与法兰之间的液膜压力的控制方程组,采用有限元法求解密封圈的热、弹变形,对新型法兰迷宫式静密封进行了流、固、热耦合分析,研究了热弹变形对法兰密封性能的影响,并对其结构进行了优化设计。结果表明,新型法兰迷宫式静密封有很好的密封性能,迷宫密封可以逐级降低密封介质的压力,从而提高密封效果。密封圈的热弹性变形可以使密封圈和法兰端面之间更紧密地贴合,防止密封介质的泄漏。
Aiming at the new type flange with labyrinth static sealing,the paper set up a thermo-fluid-solid coupling mathematical model;the controlling equation-set for seal temperature and liquid film pressure between seal and flange were solved by finite difference method;and seal′s heat,elastic,deformation by finite element method;carried out fluid,solid,thermo coupling analysis of new type flange with labyrinth static sealing;studied the impact of thermo elastic deformation on flange′s sealing function,as well as the optimum design of its structure.The results show that the new type labyrinth seal for flange has better seal performance;the labyrinth seal can gradually decrease the pressure of the seal medium,which can improve the seal performance;the thermo elastic deformation of the seal ring can make the seal and flange surface even more close match,thus can prevent seal material from leakage.
Aiming at the new type flange with labyrinth static sealing,the paper set up a thermo-fluid-solid coupling mathematical model;the controlling equation-set for seal temperature and liquid film pressure between seal and flange were solved by finite difference method;and seal′s heat,elastic,deformation by finite element method;carried out fluid,solid,thermo coupling analysis of new type flange with labyrinth static sealing;studied the impact of thermo elastic deformation on flange′s sealing function,as well as the optimum design of its structure.The results show that the new type labyrinth seal for flange has better seal performance;the labyrinth seal can gradually decrease the pressure of the seal medium,which can improve the seal performance;the thermo elastic deformation of the seal ring can make the seal and flange surface even more close match,thus can prevent seal material from leakage.
引文
[1]王学文,赵正修,文联奎.基于AB试验的法兰连接密封设计方法[J].石油化工设备,1994(5):85-90.[2〗杨晨.管壳式换热器法兰密封面泄漏问题探讨[J].科技情报开发与经济,2002(2):141-142.
[3]王雷,蒋宁.基于Matlab的管壳式换热器优化设计[J].轻工机械,2012,30(2):9-12.
[4]童鲁海.管壳式换热器的振动特性分析及模态试验[J].机电工程,2009,26(7):46-48.
[5]任全彬,蔡体敏,王荣桥,等.橡胶“O”型圈结构参数和失效准则研究[J].固体火箭技术,2006,29(1):9-14.
[6]彭旭东,刘伟,白少先,等.热弹变形对核主泵用流体静压型机械密封性能的影响[J].机械工程学报,2010,46(23):146-153.
[7]刘伟,彭旭东,白少先,等.流体静压型机械密封的三维传热数学模型及端面温度分析[J].摩擦学学报,2010,30(1):57-64.
[8]TOURNERIE B,DANOS J C,FRENE J.Three-dimensionalmodeling of THD lubrication in face-seals[J].ASME Journal ofTribology,2001,123(1):196-294.
[9]温诗铸,杨沛然.弹性流体动力润滑[M].北京:清华大学出版社,1992.
[10]杨沛然.流体润滑数值分析[M].北京:国防工业出版社,1998.
[11]杨世铭,陶文铨.传热学[M].北京:高等教育出版社,2006.
[12]王勖成.有限元分析[M].北京:清华大学出版社,2003.
[3]王雷,蒋宁.基于Matlab的管壳式换热器优化设计[J].轻工机械,2012,30(2):9-12.
[4]童鲁海.管壳式换热器的振动特性分析及模态试验[J].机电工程,2009,26(7):46-48.
[5]任全彬,蔡体敏,王荣桥,等.橡胶“O”型圈结构参数和失效准则研究[J].固体火箭技术,2006,29(1):9-14.
[6]彭旭东,刘伟,白少先,等.热弹变形对核主泵用流体静压型机械密封性能的影响[J].机械工程学报,2010,46(23):146-153.
[7]刘伟,彭旭东,白少先,等.流体静压型机械密封的三维传热数学模型及端面温度分析[J].摩擦学学报,2010,30(1):57-64.
[8]TOURNERIE B,DANOS J C,FRENE J.Three-dimensionalmodeling of THD lubrication in face-seals[J].ASME Journal ofTribology,2001,123(1):196-294.
[9]温诗铸,杨沛然.弹性流体动力润滑[M].北京:清华大学出版社,1992.
[10]杨沛然.流体润滑数值分析[M].北京:国防工业出版社,1998.
[11]杨世铭,陶文铨.传热学[M].北京:高等教育出版社,2006.
[12]王勖成.有限元分析[M].北京:清华大学出版社,2003.