Device for heating a cylindrical component and use in assembling an inter-shaft bearing in a turbomachine

A method for assembling an inter-shaft bearing in a double-body turbomachine comprising:

• placing a rear portion of a metal journal in which a bearing ring for a bearing is mounted in a heating device;
• and
• heating the metal journal using the heating device,
• wherein the heating device comprises:
• at least two heaters which deliver a stream of hot gas;
• an annular chamber defined by an outer cylindrical casing, an inner cylindrical wall and first and second walls perpendicular to an axis of the turbomachine such that the annular chamber presents a ring;
• and
• deflectors disposed inside the annular chamber between the heaters, the deflectors being arched and inclined towards the axis of the turbomachine and guide the stream of hot gas emerging into the annular chamber in rotational movement about the axis of the turbomachine,
• wherein the ring comprises a first half and a second half which are separable,
• wherein the heaters are disposed circumferentially about the annular chamber and are substantially tangential to the annular chamber, and
• wherein a diameter of the inner cylindrical wall is greater than a diameter of the metal journal, and
• wherein the annular chamber of the heating device surrounds the rear portion of the metal journal during the heating.