TURBINE LOW-PRESSURE CYLINDER EXHAUST PART HOUSING Russian patent published in 2002 - IPC

FIELD: mechanical engineering; turbines. SUBSTANCE: invention is designed for use in welded structure of low-pressure cylinder housing with bearing built into its exhaust part. According to first design version, exhaust part housing has conical shell in its lower part into which bearing case is built, and conical shell support with two metal sheets curved relative two each other towards opposite side walls of housing. Each, in zone under bearing shell, is rigidly coupled by means of separate tube from side of its convex surface with side wall of housing pointed to convex surface. Tubes sheets are arranged symmetrically relative to vertical plane passing through bearing axis. Two longitudinal ribs connected by said sheets are arranged in this plane, one under the other. Upper rib is connected with conical shell zone under bearing shell, and lower rib is connected with end face walls of housing. According to second design version, housing of exhaust part of turbine low-pressure cylinder has conical shell in lower part into which bearing case is built, and conical shell support made of two metal sheets curved relative to each other to opposite side walls of housing. Sheets are rigidly connected with conical shell in zone under bearing shell. Each sheet in this zone is rigidly connected to side wall of housing by means of separate tube from side of its convex surface pointed to housing side wall. Both are rigidly connected with end face walls of housing by end face edges. Tubes and sheets are arranged symmetrically relative to vertical plane passing through bearing axis. Sheets of tetragonal profile in longitudinal plane of housing can be used being connected to each other to form space in between and rigidly connected with conical shell by means of rib arranged in plane passing through bearing axis. EFFECT: reduced response of shaft line in zone of built-in bearing to value of vacuum load. 3 cl, 7 dwg