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US 6,269,781 B1Granted
Heat generator
AssigneeKabushiki Kaisha Toyoda Jidoshokki Seisakusho
InventorsShigeru Suzuki, Masami Niwa, Tatsuyuki Hoshino
Life of this patent
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Abstract
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 Δ relative to the inner race 7a of the bearing device 7, and is permitted to undergo thermal expansion.
Claims5
A heat generator comprising:
- a housing forming therein a heat-generating chamber and a heat-receiving chamber neighboring said heat-generating chamber and circulating a fluid;
- a drive shaft rotatably supported by said housing via bearing devices;
- a rotor rotatably provided in said heat-generating chamber by said drive shaft;
- and
- a viscous fluid filled in the gaps among wall surfaces of the heat-generating chamber and outer surfaces of the rotor and generates heat due to the shearing when said rotor is rotated;
- wherein
- said rotor includes a main rotor body for shearing said viscous fluid made of a material having a coefficient of thermal expansion larger than that of said drive shaft, and a base portion made of a material having a coefficient of thermal expansion equivalent to that of said drive shaft, inserted into said main rotor body and secured to said drive shaft while being positioned upon coming in contact with a positioning member, said rotor main body and said positioning member maintaining a gap which permits a thermal expansion of said rotor main body relative to said positioning member.
4 more elements
Dependencies are inferred from the claim text.