High-parameter steam turbine deep peak regulation high-pressure front shaft seal structure and cooling method

The invention discloses a high-parameter steam turbine deep peak regulation high-pressure front shaft seal structure and a cooling method, and belongs to the technical field of steam turbine thermal power. The structure is mainly characterized in that a steam seal ring is further arranged at the end, close to the high-pressure front shaft seal outer cylinder section, of the high-pressure front shaft seal inner cylinder section, a steam leakage connector is arranged on the inner side of the steam seal ring, the steam leakage connector is led out through a bypass pipeline, and a stop valve is arranged on the bypass pipeline; compared with a traditional structural design, a steam leakage structure is adopted in the structural design, leaked steam is led out through a bypass pipeline, the trend of the leaked steam can be effectively adjusted under the working condition of deep peak regulation of the high-parameter steam turbine, the leaked steam is controlled to make contact with a high-pressure outer cylinder ac