STEAM-TURBINE EXHAUST PIPE Russian patent published in 1998 - IPC

FIELD: developing and updating exhaust pipes of steam turbines. SUBSTANCE: exhaust pipe has body with stiffness members incorporating upper and lower horizontally split parts and axiradial diffuser installed in body and provided with inner and outer bypasses, as well as with two pairs of anti-vortex devices placed in lower split part of body; each pair is arranged symmetrically relative to pipe axis; each anti-vortex device is made in the form of grid of crossing strips each measuring in length 45-60% of exhaust blade length; in cross- sectional area, they form rectangular cells whose opposite sides are spaced through 30-40% of exhaust blade length; each anti-vortex device of one pair is rigidly fixed to side walls of lower split part of body and to outer bypass of diffuser; each anti-vortex device of other pair is attached to side walls of lower split part of body and to inner bypass of diffuser so that upper part of crossing strips is aligned with horizontal plane of split joint and cross-sectional areas of rectangular cells are parallel to it. EFFECT: improved reliability and economic efficiency of exhaust pipe. 2 dwg