COUPLING FOR CONNECTION OF TURBINE ROTORS AND METHOD OF REASSEMBLE OF SUCH COUPLING Russian patent published in 1998 - IPC

FIELD: general mechanical engineering; power-plant engineering. SUBSTANCE: coupling includes two flanged rigid half-couplings and connecting bolts fitted in holes of half-coupling flanges; mounting surfaces of holes and bolts have form of out-of-round cylinder, ellipse, for example whose cross-sections are similar and dimensions correspond to the following relationship: Δ = D_max-d_max= D_min-d_min, where Δ is mounting clearance; in assembly of coupling, centers of bolts and axes of symmetry of cross sections of bolts and holes coincide; then bolts are turned relative to holes through angle , where Z for ellipse is equal to 2; negative interference δ = d_max-D_min shall be ensured; D_max, and D_min are larger and smaller diameters of elliptical mounting surface of holes of half-coupling; d_max and d_min are larger and smaller diameters of elliptical mounting surface of holes of connecting bolts. EFFECT: enhanced durability due to repetition of assemblies and high resistance to impact loads. 3 cl, 2 dwg