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12号机系N25—35—1型,制造厂编号第1台。1970年12月26日投产,1971年7月大修一次,该机在安装时进行了机内疏水系统和超出力改进,负荷短时带过36000KW,大修后一般在10000—25000KM,周波正常。1.1972年4月24日因机组发生强烈振动(4月1日曾发生过一次)而紧急停机,揭缸见第11压力级叶片断裂26片,裂纹距叶根20～60mm,从出汽侧开始,部份裂纹叶片在
Machine No. 12 N25-35-1 type, the first manufacturer’s serial number. December 26, 1970 put into operation, overhaul in July 1971, the aircraft was installed during the installation of the internal drainage system and improvement over the load with a short load over 36000KW, overhaul generally in the 10000-25000KM, the normal cycle. 1. On April 24, 1972, there was an emergency shutdown due to strong vibration of the generating unit (once occurred on April 1), and 26 pieces of blade breakage at the 11th pressure level were found. The crack was 20-60 mm away from the root of the blade. From the outlet side Partially cracked leaves in