|
|
论文:2012,Vol:30,Issue(3):472-477 |
|
|
引用本文： |
|
|
李建克, 杨海成, 莫蓉, 王增强. 考虑倾斜的非接触机械密封启动过程瞬态热效应研究[J]. 西北工业大学 |
|
|
Li Jianke, Yang Haicheng, Mo Rong, Wang Zengqiang. Exploring Theoretically Transient Thermal Effects on Tilting Non-Contact Mechanical Seal[J]. Northwestern polytechnical university |
|
|
|
|
|
|
|
| 考虑倾斜的非接触机械密封启动过程瞬态热效应研究 |
|
| 李建克, 杨海成, 莫蓉, 王增强 |
|
| 西北工业大学 现代设计与集成制造技术教育部重点实验室,陕西 西安 710072 |
| 摘要: |
| 针对非接触密封在快速启动过程中易发生热效应引起的密封失效故障, 提出了考虑倾斜情况的弹性补偿单元支撑的非接触机械密封瞬态热效应分析模型, 它包括瞬态 Reynolds 方程、能量方程、运动方程等; 采用有限差分方法, 获得了全部微分方程的差分格式, 以此数值模拟了非接触机械密封受外部轴向冲击载荷下密封间隙中油膜的最大压力、最高温度以及最小油膜厚度等的瞬态响应。计算结果表明, 随着轴向冲击载荷的增加, 密封间压力响应的幅值、最高温升都增加, 最小油膜厚度减小; 补偿单元静态载荷越大瞬态响应至稳态的时间越短; 静载荷越小最高温度的增量越大、最小油膜厚度的变化量也越大。 |
| 关键词:
机械密封
热效应
瞬态启动
数值分析
|
|
| Exploring Theoretically Transient Thermal Effects on Tilting Non-Contact Mechanical Seal |
|
| Li Jianke, Yang Haicheng, Mo Rong, Wang Zengqiang |
|
| Northwestern Polytechnical University,Xi'an 710072, China |
| Abstract: |
| The introduction of the full paper discusses a number of papers in the open literature; then it proposesthe theoretical exploration mentioned in the title,which is presented in sections 1 through 3 in the full paper andwhose core consists of: (1) the transient thermal effect model of the non-contact mechanical seal is established; themodel consists of the transient Reynolds equation,energy equation and the equation of motion; (2) the above-men-tioned model’ s equations are solved with the finite difference method; (3) the transient response characteristicswith different axial impact loads are simulated; (4) the characteristic parameters include the maximum film pres-sure,the maximum temperature and the minimum film thickness. The calculated results,given in Figs. 2 through7,and their analysis show preliminarily that: (1) both the maximum film pressure and the maximum temperatureincrease with increasing axial impact load; (2) the minimum film thickness decreases with increasing impact load;(3) the transient response time decreases with increasing load of the elastic compensate element; (4) both the in-crement of the maximum temperature and that of minimum film thickness increase with increasing load of elasticcompensate component. |
| Key words:
differential equations
energy conservation
equations of motion
film thickness
finite differencemethod
mathematical models
pressure
Reynolds equation
seals
temperature
thermal effects
numerical analysis
transient start-up
|
|
| 收稿日期: 2011-06-12
修回日期:
|
| DOI: |
| 基金项目: 陕西省自然科学基金(2012JQ7002)资助 |
| 通讯作者:
Email： |
| 作者简介: 李建克(1978-),西北工业大学博士研究生,主要从事现代设计理论方法与机械密封技术研究。
|
|
|
|
|
|
|
|
参考文献: |
|
|
[1] 彭旭东，王玉明，黄 兴等.密封技术的现状与发展趋势.液压气动与密封，2009，4: 4-11Peng X D，Wang Y M，Huang X，et al.State-of-the-Art and Future Development of Sealing Technology.Hydraulics Pneumatics＆ Seals，2009，4: 4-11 (in Chinese)
[2] Brunetière N，Galenne E，Tournerie B，et al.Modelling of Non-Laminar Phenomena in High Reliability Hydrostatic Seals Oper-ating in Extreme Conditions.Tribology International，2008，41(4): 211-220
[3] 朱维兵，李 娜，王和顺.基于热变形补偿的干气密封动静环优化.西华大学学报(自然科学版)，2009，28(5): 1-4Zhu W B，Li N，Wang H S.Optimization of Rotary and Stationary Rings in the Equipment with Dry Gas Seal Based on ThermalDeformation Compensation.Journal of Xihua University(Natural Science Edition)，2009，28(5): 1-4 (in Chinese)
[4] 张国渊，袁小阳，赵伟刚等.螺旋槽端面密封脱开转速的理论及实验研究.机械工程学报，2008，44(8): 55-60Zhang G Y，Yuan X Y，Zhao W G，et al.Theoretical and Experimental Approach of Separation Speed of Spiral Groove FaceSeals.Chinese Journal of Mechanical Engineering，2008，44(8): 55-60 (in Chinese)
[5] Brunetiere N，Apostolescu A.A Simple Approach to the Thermo Elastohydrodynamic Behavior of Mechanical Face Seals.Tri-bology Transactions，2009，52(2): 243-255
[6] (英) O* 平克斯，B* 斯德因李希特.流体动力润滑理论.北京: 机械工业出版社，1980 |
|
|
|
|
|
|
|
