排灌机械工程学报
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排灌机械工程学报  2010, Vol. 28 Issue (3): 228-232    DOI: 10.3969/j.issn.1674—8530.2010.03.011
泵理论与技术 最新目录 | 下期目录 | 过刊浏览 | 高级检索 Previous Articles  |  Next Articles  
螺旋槽干气密封系统轴向振动响应及结构优化
张伟政1,2, 俞树荣1, 丁雪兴1,2, 韩明君3, 杜兆年2
(1.兰州理工大学 石油化工学院, 甘肃 兰州 730050; 2.兰州理工大学  温州泵阀工程研究院, 浙江 温州 325105;  3.兰州理工大学 理学院, 甘肃  兰州  730050)
Dynamic response of axial vibration and structural optimization for dry gas seal system with spiral groove
Zhang Weizheng1,2, Yu Shurong1, Ding Xuexing1,2, Han Mingjun3, Du Zhaonian2
(1.College of Petrochemical Engineering, Lanzhou University of Technology,  Lanzhou,Gansu 730050, China;  2.Wenzhou Research Institute of Pump and Valve Engineering,  Lanzhou University of Technology, Wenzhou, Zhejiang 325105, China;  3.School of Science,  Lanzhou University of Technology, Lanzhou, Gansu 730050,  China)
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摘要 以密封静环为振子建立了气膜-密封环流固耦合系统轴向振动的计算模型,利用PH线性化方法、复函数分离变量法和小参数迭代法近似求解雷诺方程,求得了气膜动压近似解析式,进而求出了气膜推力.以此推力作为振动方程的激振力,建立了轴向单自由度受迫振动方程;利用龙格-库塔法求解,获得了不同螺旋角和槽深响应的振动相轨图和时间历程图,并分析了螺旋角和槽深对振动位移的影响.研究结果表明:螺旋角和槽深对振动参数均有影响,其中螺旋角对振动最为显著.改变螺旋角和槽深数值可以控制密封环的振幅,通过选择其最佳值可以保证干气密封运行的稳定性.本实例的最佳值为螺旋角74°58′48″,槽深5 μm,与试验数据基本一致.
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张伟政
俞树荣
丁雪兴
韩明君
杜兆年
关键词螺旋槽   干气密封   流固耦合       轴向振动   结构优化     
Abstract:  A calculation model on the fluid-solid coupling system of gas film and seal rings subjected to axial vibration was established by taking static seal ring as the oscillator, and the Reynolds equation was approximately solved by using PH  linearized method, complex function variables separation method and small parameter iterative method.The approximate analytic expression of gaseous film dynamic pressure and gaseous film force were obtained.Axial forced vibration equation of single degree of freedom was established by taking gas film force as the exciting force, which was solved by using the Runge-Kutta algorithm, then the vibration phase chart and the time history chart responded by the different spiral angles and grooved depth were obtained, and the effect of spiral angles and grooved depth on vibration displacement was analysed. The results show that vibration parameters were affected by spiral angles and grooved depth, and the vibration caused by spiral angles is the dominant one.The vibration amplitude of seal ring can be controlled by changing spiral angles and grooved depth, and the dynamic stability of gas seal can be kept by selecting their optimal value.The optimal values of the spiral angles and the groove depth in this example are 74°58′48″ and 5 μm  respectively,and which are in agreement with the experimental data.
Key wordsspiral groove   gas seals   fluid-solid coupling   axial vibration   structural optimization   
出版日期: 2010-05-30
基金资助:

国家自然科学基金资助项目(50965010); 高等学校博士学科点专项科研基金资助项目(20096201110001)

通讯作者: 张伟政(1978-),男,甘肃白银人,讲师,博士研究生(zhangweiz@163.com),主要从事泵阀与密封技术研究.    
作者简介: 俞树荣(1962-),男,甘肃兰州人,教授,博士生导师(yusr@lut.cn),主要从事化工装备与密封技术研究.
引用本文:   
张伟政,俞树荣,丁雪兴等. 螺旋槽干气密封系统轴向振动响应及结构优化[J]. 排灌机械工程学报, 2010, 28(3): 228-232.
ZHANG Wei-Zheng,YU Shu-Rong,DING Xue-Xing et al. Dynamic response of axial vibration and structural optimization for dry gas seal system with spiral groove[J]. Journal of Drainage and Irrigation Machinery Engin, 2010, 28(3): 228-232.
 
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