Steam flow excited vibration and dynamic characteristics of seal in different rotor whirling motion

被引：17
作者：
Si, Heyong [1 ]
Cao, Lihua [1 ]
Li, Pan [1 ]
Chen, Dongchao [1 ]
机构：
[1] Northeast Elect Power Univ, Sch Energy & Power Engn, Jilin 132012, Jilin, Peoples R China
来源：
TRIBOLOGY INTERNATIONAL | 2021年 / 160卷
基金：
中国国家自然科学基金;
关键词：
Labyrinth seal; Conical whirl motion; Steam flow excited vibration; Dynamic characteristics; COMPUTATIONAL FLUID-DYNAMICS; ROTORDYNAMIC COEFFICIENTS; LABYRINTH SEALS; FORCE; MODEL; PREDICTION;
D O I：
10.1016/j.triboint.2021.107029
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
A multi-frequency conical whirl model was established to investigate the influence of different rotor whirling motion on seal steam flow excited vibration and dynamic characteristics. The simulation method of rotor motion was improved to adapt the ultra-supercritical steam turbine, in which the whirling motion and rotational motion were decomposed by user-defined function (UDF). The seal steam flow excited vibration and dynamic characteristics of parallel whirl motion, semi and full conical whirl motion were present. The influences of different rotor motion were analyzed via pressure waveform. The dynamic coefficients have the obvious variation in semi and full conical whirl motion. The expansion profile of seal cavity caused by conical whirl motion makes the fluctuation range of circumferential pressure great.
引用
收藏
页数：11
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