| 汽轮机转子挠曲对可倾瓦轴承油膜特性的影响 |
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| 引用本文： | 曹康琪越. 汽轮机转子挠曲对可倾瓦轴承油膜特性的影响[J]. 黑龙江电力, 2014, 36(5): 451-454 |
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| 作者姓名： | 曹康琪越 |
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| 作者单位： | 大唐长春第二热电有限责任公司,长春,130000 |
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| 摘 要： | 针对大跨度汽轮机转子在运行中转子挠曲变化引起轴颈油膜振荡的问题,笔者建立了线支撑四瓦块可倾瓦滑动轴承油膜模型,分析了汽轮机运行中转子挠曲变化对线支撑可倾瓦轴承油膜特性的影响,得到了挠曲变化下油膜温度和油膜压力的变化规律.通过数值模拟计算,结果表明,随着汽轮机轴挠曲转角的逐渐增大,轴承油膜压力极值向轴颈内侧偏移,使油膜温度分布不均匀,造成油膜破裂,影响汽轮机组安全经济运行。
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| 关 键 词： | 汽轮机 转子挠曲 可倾瓦轴承 数值模拟 |
Influence of steam turbine rotor deflection on oil film characteristics of tilting-pad bearing |
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| CAO Kangqiyue. Influence of steam turbine rotor deflection on oil film characteristics of tilting-pad bearing[J]. Heilongjiang Electric Power, 2014, 36(5): 451-454 |
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| Authors: | CAO Kangqiyue |
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| Affiliation: | CAO Kangqiyue ( Datang Changchun No. 2 Thermal Power Company Limited, Changchun 130000, China) |
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| Abstract: | Aiming at the journal oil film oscillation caused by rotor deflection during the running of large-span steam turbine rotor, the author establishes oil film model of tilting-pad bearing, analyzes the influence of rotor deflection on oil film characteristics, and works out the change law of oil film temperature and pressure under deflection. Through the numerical simulation, the result shows that the extreme value of bearing oil film pressure migrates to the inner side of journal with the increase of deflection angle, which leads to oil film temperature unevenly dis- tributes so as to influence the safe and stable operation of turbine unit. |
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| Keywords: | steam turbine rotor deflection tihing-pad bearing numerical simulation＇ |
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