汽机本体轴封系统由轴封压力调节阀、均压箱、轴封冷却器等组成。作用是防止汽缸内蒸汽和阀杆漏气向外泄漏,在机组正常运行时,防止高温蒸汽引起汽轮机转子轴承超温,防止蒸汽漏入汽缸的真空部分,回收工质和热量。轴封加热器是系统的重要设备之一,其功能是回收汽机轴封排汽 Steam turbine shaft seal system consists of shaft seal pressure regulating valve, pressure tank, shaft seal cooler and other components. The role is to prevent leakage of steam cylinder and valve stem leakage to the outside, the normal operation of the unit to prevent high temperature steam turbine rotor bearing over-temperature caused to prevent steam leakage into the cylinder vacuum part of the recovery of refrigerant and heat. Shaft seal heater is one of the important equipment of the system, its function is to recover steam turbine shaft seal exhaust