LEAKAGE PREVENTING STRUCTURE OF TURBINE EXPANDER

摘要

PURPOSE: A leak tightness structure for a turbine expander is provided to reduce a pressure difference which is applied to both ends of a sealing member which blocks a gap between a stator and a shaft, thereby preventing damage to a sealing member and improving the overall durability. CONSTITUTION: A leak tightness structure for a turbine expander includes a casing(110), a turbine wheel(120), a stator(130), a shaft(140), and a blocking unit(150). The turbine wheel is arranged inside the casing and is rotated by a working fluid which flowing from an inlet port(111). The stator is arranged to be adjacent to the casing. The shaft is coaxially coupled with the turbine wheel in the stator. The blocking unit blocks a gap between the stator and the casing. The shaft is formed with a connection flow passage(141) which connects an outlet and the blocking unit.