某热电厂CC12-4.90/0.98/0.294型双抽冷凝式汽轮机在运行中出现了振动过大现象，停机揭缸后发现次末级有两片叶片从叶片约三分之一处断掉。

HuangGu Thermal Power Plant CC12-4.90/0.98/0.294 condensing turbine with two intermediate stage extractions appears excessive vibration in the operation.

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本文的主要目的是讨论弯扭叶片在大功率汽轮机低压缸末级和次东级的工程应用问题。

The primary goal of this paper is to discuss the engineering application of the bowed and twisted blade on sub-last and last stages of steam turbines.

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