SINGLE CYLINDER 120-150 MW REHEAT CONDENSING STEAM TURBINE WITH REACTION BLADING

摘要

This invention relates to a single cylinder medium capacity reheat condensing turbine, which comprises an outer casing assembly (1) consisting of two halves (upper and lower) having a horizontal separation line; the upper half provided with an integral valve chest (2) housing an HPstop and a first plurality of control valves; the lower half provided with a provision for bolting an IP stop and a second plurality of control valves (3); a fabricated exhaust hood (4) bolted to the rear end of the outer casing, and housing three guide wheels (5) which hold the last three stages of guide blades; the outer casing (1) accommodating a HPinner casing (6), an IP inner casing (7) and gUide blade carriers (8) which house the stationary reaction blading; and a rotor (9) which holds the moving reaction blading, and which converts the thermal energy to kinetic energy. The inlet steam enters the outer casing (1) through the HP stop and the first plurality of control valves in the steam chest (2), and enters the HP inner casing (6). It expands through the reaction blading in the inner casing, and exits the outer casing to the boiler for reheat. The reheat steam enters the IP stop and a second plurality of control valves (3), then the IP inner casing (7) and expands through the reaction blading in the IP inner casing (7) and the gUide blade carriers (8). It then expands in the LP gUide wheels (5), and exits through the exhaust hood (4). The energy of the steam is converted to kinetic energy as the rotor (9) rotates and drives the driven machine.