HEAT GENERATOR

摘要

In a heat generator of the invention in which a drive shaft 8 is made of an iron-type metal, a rotor 9 includes a main rotor body 9a made of an aluminum-type metal for shearing a silicone oil SO and a bush 9b made of an iron-type metal inserted in the main rotor body 9a and secured to the drive shaft 8 while being positioned in contact with the inner race 7a of a bearing device 7. The main rotor body 9a has at least a gap .DELTA. relative to the inner race 7a of the bearing device 7, and is permitted to undergo thermal expansion.