汽轮机启动时汽缸偏差产生原因及对机组影响分析

摘要

通过对作用在汽轮机上的管道力和汽缸上存在的温差分析，说明了温差是引起汽缸左右偏差的主要原因。根据汽轮机滑销系统的设置特点，验证了该偏差值对机组静体部分的中心偏移量影响是有限的，不会导致机组的动静擦碰。得出了机组启动时，不能以汽缸左右偏差值的大小作为评判停机依据的结论。%By anylyzing the piping force on steam turbine and the temperature difference on the cylinder , the temperature difference is the main factor to cause the left-right deviation of steam turbine .Base on the setting character of the sliding system ,the deviation influence on the center offset of the static part in the turbine is verified to be limited and can not cause collision between the dynamic and static parts of the turbine .Finally the paper shows that ,during the turbine being started , the value of the deviation can not be a basis for judging the steam turbine shutting .