| 多级离心泵级间密封动力学特性研究 |
| |
| 引用本文： | 刘兴发,雪增红,肖飞,李文伟,李奎.多级离心泵级间密封动力学特性研究[J].中国农村水利水电,2021(1). |
| |
| 作者姓名： | 刘兴发 雪增红 肖飞 李文伟 李奎 |
| |
| 作者单位： | 重庆水泵厂有限责任公司国家企业技术中心 |
| |
| 基金项目： | 重庆市重点产业共性关键技术创新专项项目(cstc2017zdcy-zdyf0169)。 |
| |
| 摘 要： | 密封力学特性对于多级离心泵转子运行稳定性,泵机组减振降噪等具有重要意义。为了探究迷宫密封结构对转子运转性能的影响,对不同密封齿高、密封齿距及密封齿厚的密封刚度系数、阻尼系数进行了计算,研究了不同结构的迷宫密封对转子1阶临界转速的影响。结果表明平面密封比迷宫密封具有更好的密封力学性能;直接刚度和直接阻尼随着密封齿高的增加而降低,而交叉刚度与交叉阻尼的变化较小;密封齿高对转子的1阶临界转速的影响较大,临界转速随着密封齿高增大而呈先减小后增大的趋势,当密封齿高大于1 mm后,临界转速变化趋势不明显;而密封齿距及密封齿厚对迷宫密封的密封力学性能及临界转速的影响较小。
|
| 关 键 词： | 离心泵 迷宫密封 刚度系数 阻尼系数 临界转速 |
The Study of Labyrinth Seal Force Behavior of Multistage Centrifugal Pumps |
| |
| LIU Xing-fa,XUE Zeng-hong,XIAO Fei,LI Wen-wei,LI Kui.The Study of Labyrinth Seal Force Behavior of Multistage Centrifugal Pumps[J].China Rural Water and Hydropower,2021(1). |
| |
| Authors: | LIU Xing-fa XUE Zeng-hong XIAO Fei LI Wen-wei LI Kui |
| |
| Institution: | (National Enterprise Technology Center, Chongqing Pump Industry Co. Ltd., Chongqing 400033, China) |
| |
| Abstract: | Understanding the sealforce behavior is critical in determining the reliability/operability and vibration of centrifuge pumps.In order to study the effect of different labyrinth seal structure on rotordynamic,the Madyn2000 is used to compute the stiffness coefficient,damping coefficient and critic speed for several types of tooth height,tooth pitch,tooth thickness.And the sensitivity of different parameters is investigated.The results show that the sealforce of annular seal is stronger than the labyrinth sea.The influence of tooth height on critical speed is more sufficient than tooth pitch and tooth thickness.As tooth height increases in labyrinth seal,the direct stiffness coefficient(k)and cross stiffness coefficient(kq)decrease,while the direct damping coefficient(m)and direct damping coefficient(mq)change softly. |
| |
| Keywords: | centrifugal pump labyrinth seal stiffness coefficient damping coefficient critical speed |
| 本文献已被 维普 等数据库收录！ |
|
