Roller mill gear case and a casting mould pattern for making such case

摘要

Gear housing for the gear of a roller grinding mill or a bowl-mill pulverizer with a vertical rotation axis has a cylindrical wall (2) and an annular bearing surface (1) for an axial bearing consisting of several pivoted pad thrust bearings arranged on a central pad bearing diameter. The housing is a one-piece cast part. The cylindrical wall of the housing is corrugated and graduates into the annular bearing surface for the axial bearing. An Independent claim is also included for a casting model for producing the above gear housing. Preferred Features: The transition (5) between the cylindrical wall and the annular bearing surface is conical and forms a beveled housing wall.