High-power steam turbine cylinder body interlayer temperature balancing structure

The invention discloses a high-power steam turbine cylinder body interlayer temperature balancing structure which comprises a steam turbine outer cylinder, a steam turbine inner cylinder and a steam inlet pipeline, a cooling gas pipeline is arranged on the steam inlet pipeline and communicated to a pipeline interlayer of the steam inlet pipeline, and an included angle exists between the axis of the cooling gas pipeline and the axis of the steam inlet pipeline. The method has the advantages that flow difference of high-temperature steam and low-temperature steam in the interlayer is controlled, backflow of inter-stage leaked steam in the interlayer is blocked, differential expansion change of a steam turbine cylinder body is reduced, deformation and fatigue damage of an inner cylinder and an outer cylinder are avoided, thermal efficiency of a steam turbine is improved, and the service life of the steam turbine is prolonged. 本发明公开了一种大功率汽轮机缸体夹层间温度平衡结构，包括汽轮机外缸、汽轮机内缸和进汽管道，进汽管道的上设有冷却气体管道，冷却气体管道连通至进汽管道的管道夹层间，冷却气体管道的