Low-pressure cylinder cooling device used after cylinder switching transformation of combined heat and power generation steam turbine generator unit

• Main Authors: CHEN YUXIANG, QIAO HONGWEI, CHANG XIAOKAI, HOU PEIYIN, YU HAITAO, ZHANG HAO, HAN SHUANG, LI NING, LIU YUYANG, GAO QING, XU PINGHAO, LI QING, MIAO QIANG, WU LINGLING
• Format: Patent
• Language: Chinese; English
• Published: 20.11.2020
• Subjects: BLASTING; ENGINE PLANTS IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; STEAM ENGINES; WEAPONS

The utility model discloses a low-pressure cylinder cooling device used after cylinder switching transformation of a cogeneration steam turbine generator unit. The utility model belongs to the technical field of turbines, the problems that after cylinder cutting transformation of a steam turbine generator set, a low-pressure cylinder water spraying method is adopted for operation, final-stage blades are eroded, the temperature of the final-stage blades and sub-final-stage blades of the low-pressure cylinder is not stable, the low-pressure cylinder is prone to overtemperature, safety cannot beguaranteed, long-term use is not easy, and therefore the operation flexibility of the unit after cylinder cutting transformation is reduced are solved. The device comprises a medium-low pressure communicating pipe, a temperature reducing water pipe, a temperature reducing device, a water inlet regulating valve, a steam regulating valve and a flow meter, wherein two ends of the medium-low pressurecommunicating pipe are res