Thermal expansion absorber

Details Thermal expansion absorber Thermal expansion absorber

1987-02-24

1988-11-15

Budd, Mark O.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 87, H02K 908

Patent

active

047852119

ABSTRACT:
A pressure variable sealed container such as a length of rubber tubing is filled with a compressible, thermally conductive fluid such as helium or hydrogen and is placed in a sealed motor stator chamber otherwise filled with a heat conductive liquid, such as oil, before final assembly. As the oil in the stator chamber expands with temperature, the thermally conductive fluid in the container is compressed thereby absorbing the expansion of the oil in the stator chamber.

REFERENCES:
patent: 1879628 (1932-09-01), Mendenhall et al.
patent: 2569741 (1951-10-01), Arutunoff
patent: 2683823 (1954-07-01), Cunningham et al.
patent: 2917644 (1959-12-01), Lafoon et al.
patent: 3785753 (1974-01-01), Bogdanov et al.
patent: 4126406 (1978-11-01), Traylor et al.
patent: 4558246 (1985-12-01), Tokumitsu

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