轴承振动对油膜涡动的影响分析与试验

doi:10.11930/j.issn.1004-9649.201912079

中国电力 ›› 2020, Vol. 53 ›› Issue (7): 211-216.DOI: 10.11930/j.issn.1004-9649.201912079

• 发电 • 上一篇

轴承振动对油膜涡动的影响分析与试验

何国安^1,2, 胡相余³, 杨铖³, 安仕江⁴, 张学延^1,2

1. 西安热工研究院有限公司，陕西西安 710032;
2. 西安西热节能技术有限公司，陕西西安 710032;
3. 安徽淮南平圩发电有限责任公司，安徽淮南 232089;
4. 贵州粤黔电力有限责任公司，贵州六盘水 553000

收稿日期:2019-12-13 修回日期:2020-02-25 发布日期:2020-07-05
作者简介:何国安(1980—)，男，硕士，高级工程师(教授级)，从事汽轮发电机组轴系振动故障诊断及现场动平衡工作，E-mail: heguoan@tpri.com.cn
基金资助:
中国电力国际有限公司科技项目(2018-010-ZDG-KJ-X)

Analysis and Test on the Effect of Bearing Vibration on Oil Film Whirl

HE Guoan^1,2, HU Xiangyu³, YANG Cheng³, AN Shijiang⁴, ZHANG Xueyan^1,2

1. Xi'an Thermal Power Research Institute Co., Ltd., Xi'an 710032, China;
2. Xi'an TPRI Energy Conservation Technology Co., Ltd., Xi'an 710032, China;
3. Anhui Huainan Pingwei Power Generation Co., Ltd., Huainan 232089, China;
4. Guizhou Yueqian Power Co., Ltd., Liupanshui 553000, China

Received:2019-12-13 Revised:2020-02-25 Published:2020-07-05
Supported by:
This work is supported by Science and Technology Project of China Power International Co., Ltd. (No.2018-010-ZDG-KJ-X)

摘要/Abstract

摘要： 为了研究轴承振动对油膜涡动的耦合影响，分析了轴承振动的运动机理，建立了轴承振动对油膜涡动影响的动力学方程，指出轴承振动将改变润滑油膜的边界条件，对润滑流场产生扰动，这一方面可能加剧油膜涡动，产生明显的半频振动波动；另一方面还可能改变油膜厚度，使油膜刚度发生变化，引起基频振动波动。随后在现场实际机组上进行了验证试验，结果表明：小型、轻载轴承振动对油膜涡动影响明显，会激发剧烈的基频和半频振动波动；但大型、重载轴承振动对油膜涡动的影响不大，只会引发一定程度的基频振动波动。

关键词: 汽轮机, 轴承, 油膜涡动, 油膜厚度, 油膜刚度, 基频振动, 半频振动

Abstract: In order to study the coupling effect of bearing vibration on oil whirl, the motion mechanism of bearing vibration is analyzed, and the dynamic equation representing the effect of bearing vibration on oil whirl is established. It is pointed out that bearing vibration will change the boundary conditions of lubricating oil film and hence disturb the lubricating flow field, which may aggravate oil film whirl and produce significant half-frequency vibration fluctuation. On the other hand, it may also change the thickness of the oil film such that the oil film stiffness also changes, causing the fundamental frequency vibration fluctuation. Subsequently, a verification test was performed on the actual units on site. The results show that the vibration of small or light load bearings has remarkable effect on the oil whirl, which will cause severe fundamental and half-frequency vibration fluctuation, while the vibration of large or heavy load bearings does not affect the oil whirl very much, which will only trigger some fundamental frequency vibration fluctuation at certain level.

Key words: steam turbine, bearing, oil whirl, oil film thickness, oil film stiffness, fundamental frequency vibration, half-frequency vibration

何国安, 胡相余, 杨铖, 安仕江, 张学延. 轴承振动对油膜涡动的影响分析与试验[J]. 中国电力, 2020, 53(7): 211-216.

HE Guoan, HU Xiangyu, YANG Cheng, AN Shijiang, ZHANG Xueyan. Analysis and Test on the Effect of Bearing Vibration on Oil Film Whirl[J]. Electric Power, 2020, 53(7): 211-216.

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https://www.electricpower.com.cn/CN/Y2020/V53/I7/211

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轴承振动对油膜涡动的影响分析与试验

Analysis and Test on the Effect of Bearing Vibration on Oil Film Whirl

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轴承振动对油膜涡动的影响分析与试验

Analysis and Test on the Effect of Bearing Vibration on Oil Film Whirl

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