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论文:2013,Vol:31,Issue(2):266-271 |
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引用本文： |
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李建克, 莫蓉, 杨海成, 王增强. 考虑倾斜的非接触机械密封高阶非线性特性分析[J]. 西北工业大学 |
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Li Jianke, Mo Rong, Yang Haicheng, Wang Zengqiang. Analysis of Higher Order Nonlinear Characteristics of Tilting Non-Contact Mechanical Seal[J]. Northwestern polytechnical university |
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| 考虑倾斜的非接触机械密封高阶非线性特性分析 |
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| 李建克, 莫蓉, 杨海成, 王增强 |
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| 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: |
| 为较好地获知非接触密封动力学特性,提出了一种考虑倾斜的密封高阶非线性油膜力和动特性系数求解数学模型的扩展模型,该模型包括倾斜因素下的密封间隙流体油膜厚度方程、油膜瞬态压力求解方程;利用该模型可得到密封间隙内油膜对密封环的高阶油膜力表达方式,及高阶非线性项时的油膜力相对误差。通过算例分析,结果表明随着无量纲非线性稳态油膜力阶数的增加,油膜力计算相对误差越来越小;随着油膜厚度的增大,非线性稳态油膜力、非线性刚度系数和阻尼系数减小。 |
| 关键词:
非接触机械密封
非线性油膜力
高阶非线性
倾斜
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| Analysis of Higher Order Nonlinear Characteristics of Tilting Non-Contact Mechanical Seal |
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| Li Jianke, Mo Rong, Yang Haicheng, Wang Zengqiang |
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| Department of Mechanical Engineering,Northwestern Polytechnical University,Xi'an 710072,China |
| Abstract: |
| In order to obtain the dynamic characteristics of the unstable situation of the non-contact mechanicalseal,we present a mathematical model for solving the higher order nonlinear oil film force and dynamic coefficientsof the tilting non-contact mechanical seal. The model includes the fluid film thickness equation with the tilting sealring and the equation for solving the transient film pressure considered. With the model, we establish the expressionfor the higher order nonlinear film force on the seal film gap,and we obtain the error of the higher order nonlinearfilm force relative to the linear film force. We give an example for calculating and verifying the nonlinear film forceand the relative error for the tilting non-contact mechanical seal. The calculated results and their analysis show pre-liminarily that the relative error of the nonlinear film force decreases with increasing order,and all of the non-linearfilm forces,the non-linear stiffness coefficients and damping coefficients decrease with increasing film thickness. |
| Key words:
algorithms
calculations
damping
errors
estimation
film thickness
mathematical models
nonlin-ear systems
seals
stability
stiffness
transient analysis
vibrations (mechanical)
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| 收稿日期: 2012-05-28
修回日期:
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| DOI: |
| 基金项目: 国家自然科学基金(51205320)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。
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参考文献: |
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