汽轮机主油泵驱动方式及其优化

文档编号:RN037  文档字数:10543,页数:20

文档题目：汽轮机主油泵驱动方式及其优化
摘　要
 调查了大量采用齿式联轴器驱动的主油泵的汽轮机组，分析其运行状况。针对多起汽轮机主油泵齿式联轴器频繁磨损，导致频繁检修甚至事故停机的问题，根据国内机组出现的类似现象，从联轴器的运动规律着手，分析了汽轮机组对主油泵联轴器性能的要求；根据齿式联轴器常见故障的现象，找到了联轴器频繁损坏的原因；针对现有文献对主油泵中心预留高度和推力瓦推力间隙的应用范围介绍不明确的情况，从主油泵找中心的原理着手，分析了主蒸汽进汽位置、1号瓦处保温情况及轴封漏汽等因素，确定了主油泵中心标准；从机组运行安全性出发，根据机组型式确定了主油泵推力瓦推力间隙的范围。从据国内机组出现的类似现象，对该类型联轴器频繁损坏进行了分析研究，认为此种类型的驱动方式不适合于现代DEH调节机组。采用刚性联轴器驱动的主油泵是最佳选择，可以有效提高机组的安全性及经济性。对不具备改造条件的机组提出了优化建议。
 
 关 键 词：主油泵；联轴器；驱动；刚性连接；
 
 文档类型：应用研究
 
   
Title:The drive-style of main oil pump and it’s optimization
ABSTRACT

Investigated many steam turbines with tooth-coupling, and studied how they were running. we researched many high-frequency maintenance and accident trips which were conduced by the abrasion of the main oil pump, and referenced the similar damages of other steam turbines, and studied the cause of the damage. This paper commenced on the movement of the coupling, and analyzed how the main oil pump coupling can fit the steam turbines. According to the damage of the coupling, we found the cause. The difference between the rotor of steam turbine and the rotor of main oil pump, and the clearance of the thrust pad on main oil pump, are two important data during the installation of main oil pump, and there are difference results on the two data. In fact, it will be dangerous for the turbo-generator unit if we use the two data without selection. Analyzed the theory of how to adjust the centers, the position of the inlet of main steam, and heat preservation near No1 bearing, and gave the standard of the center of main oil pump; for the safety of the steam turbine, made clear the scale of the thrust pad of main oil pump. Practice has shown that this way could raise the safety of the unit, and lower the maintenance spending of the unit. The drive-style of main oil pump with tooth-coupling doesn’t match the turbo-generators with DEH system, the best choice is to use a direct connect coupling, and it can improve the safety and economic. and gave some advice to the plants which don’t want to change their steam main oil pumps.
KEY WORDS:main oil pump; coupling, drive, direct connect
TYPE OF THESIS: Application Study

目  录
摘　要 3
1 引言 6
1.1 现有机组的运行状况 6
1.2 主油泵驱动方式优化的必要性 6
2 主油泵联轴器故障分析 7
2.1 汽轮机转子与主油泵转子的位置关系 7
2.2 汽轮机转子及主油泵转子的运动分析 7
2.2.1 轴向运动 8
2.2.2 径向运动 8
2.3 联轴器的运动分析 8
2.4 对汽轮机组主油泵转子联轴器的性能要求 9
2.5 齿式联轴器的结构 10
2.6 齿式联轴器在汽轮机组中的应用 10
3 齿式联轴器故障的表现及原因 10
3.1 磨损 10
3.1.1 制造工艺 10
3.1.2 材质应用不当或表面热处理工艺差 11
3.1.3 润滑效果差 11
3.1.4 安装偏差 11
3.2 卡涩 11
3.3 抱死 11
3.4 掉齿 11
4 主油泵安装工艺对联轴器的影响 11
4.1 主油泵安装工艺分析 11
4.1.1 主油泵中心预留高度 11
4.1.2 主油泵中心预留高差的计算方法 11
4.1.3 汽轮机轴径抬升量的计算 12
4.1.4 主油泵转子膨胀量的计算 12
4.1.5 油膜厚度的说明 13
4.1.6 主油泵找中心时的预留高度 13
4.1.7 主油泵联轴器对中精度的分析 13
4.1.8 推力瓦位置对主油泵中心的影响 13
4.1.9 汽轮机进汽位置对中心的影响 14
4.1.10 推力间隙对主油泵安全性的影响 14
5 主油泵驱动方式的优化 15
5.1 优化的前提条件 15
5.1.1 汽轮机转子膨胀问题 15
5.1.2 汽轮机转子冷热态中心标高不同问题 15
5.2 主油泵驱动优化的现场应用 16
6 结论 17
致    谢 17
参考文献 17

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