上海汽轮机厂制造的30万千瓦汽轮机的中压联合汽门结构和该厂生产的12.5万千瓦机组一样,我厂一台30万千瓦机组在78年检修时,发现中压第一级进汽隔板静叶内嵌有M20螺丝两只,并已造成中压转子第一级动叶进汽边轧伤。经检查,这是中压调门阀碟导套的固定螺丝断裂所引起。该机有中压调门4只,导套固定螺丝共有24只(每只导套上有6只), Shanghai Steam Turbine Factory to manufacture 300,000 kilowatts of steam turbine pressure with the steam valve structure and the plant produced 125,000 kilowatts of units, I plant a 300,000 kilowatts unit overhaul in 78 years and found that the first level of medium pressure into the car Plate Mint leaves embedded in the two leaves, and has caused the first-stage rotor blade into the steam side of the rolling injury. After checking, this is caused by the breakage of the fixing screw of the medium pressure adjusting valve disc guide sleeve. The machine has 4 medium-pressure door, a total of 24 sets of guide screws (each guide on the 6)