Frangible bearing support for a turbomachine rotor

摘要

The break point (14) is formed by dividing the non-rotating bearing support (26) into sections (26a, 26b) and providing two partition surfaces (28a, 28b) extending at right angles to the bearing rotation axis. Guide surfaces evenly distributed around the bearing support periphery are provided in between the support sections and arranged in pairs in opposing partition surfaces. These partition surfaces and the guide bodies housed in between the guide surfaces are held in contact with each other without play using axially oriented clamping screws (32) evenly distributed around the bearing support periphery and applying a pre-determined tensile force. Bearing forces (44) acting upon the bearing support are converted into axial tensile forces acting upon the screws and upon exceeding a pre-determined threshold value, the bearing forces will cause the screws to break.