FLANGED JOINT UNIT Russian patent published in 2001 - IPC

FIELD: mechanical engineering; hydraulic machinery engineering; connection of hydraulic turbine shaft with hydraulic generator shaft and working wheel of turbine. SUBSTANCE: flange to which nut adjoins has hole for tight fitting of bolt smoothly changing to parting plane. Other flange is provided with hold for fitting the bolt at rated clearance smoothly changing to concentric cylindrical bores of larger diameter adjoining the parting plane on one side and bearing surface of bolt heat on other side. EFFECT: enhanced fatigue strength of joint due to avoidance of bending stresses in threaded portion of bolt due to avoidance of bending in this part reduced wear fatigue of bolt in zones under bands of flanges due to reduced bending of bolts of this zone. 1 dwg