分析了某机组中双压汽轮机的低压蒸汽管道用补汽阀门支撑结构存在的问题,采用模拟的方法探讨了低压补汽阀在不同方案下阀杆支撑结构处的受力和热位移,以及阀后管道对汽轮机接口产生的推力和推力矩,改进了阀门的支撑结构,不仅便于管道应力计算书的编写,还满足了汽轮机接口力和力矩的要求。 The problems existing in the supporting structure of the low-pressure steam pipe of the double-pressure turbine in a certain unit with the supplemental steam valve are analyzed. The force and thermal displacement of the low-pressure compensated steam valve at different positions of the valve rod supporting structure are discussed by the simulation method. After the pipe to the turbine interface thrust and thrust torque, improving the valve support structure, not only to facilitate the preparation of the pipe stress book, but also to meet the turbine interface force and torque requirements.