Kabushiki Kaisha Toshiba

Hidekazu Shiomi

Yasuo Kabata

Yoshihiro Taniyama

Yutaka Hashiba

Yukihiko Kazao

Shozo Abe

Takaharu Tani

Kenmei Shimanuki

Makoto Mikami

Ikuo Saito

Takeshi Hayashi

It is an object of this invention to provide a dynamo-electric machine rotor which effectively and uniformly cools a rotor coil outside a rotor core by forming a ventilating groove in the rotor coil, tolerates large field current, and has high reliability. There is provided a dynamo-electric machine rotor in which spaced core slots are formed in a cylindrical rotor core, rotor coilsof stacked turns are fitted into the core slots to form multiple nested rings around a magnetic pole of the rotor, ends of the rotor coils are fixed by an retaining ring, and a spaceris arranged in each of circumferential gaps between the ends of the rotor coils, wherein each spacerhas a length not more than the lengths of linear portionsat the ends of corresponding ones of the rotor coils, a cut-outfor ventilation of coolant gas is formed across at least one of two sides of the spacer, and the spacer is in contact with the rotor coils at the two sides of the spacer at a position located furthest inside in the radial direction of the rotor and an arbitrary position.

Dynamo-electric machine rotor

Hydrogen gas is circulated to cool an electric rotating machine main body, and brush seals are provided to contact a predetermined position on the outer circumferential surface of a rotating shaft. As a result, contact of a sealing oil and the hydrogen gas, contact of a lubricating oil and the sealing oil in the bearing, and leakage of the hydrogen gas outside the machine are prevented.

Electric rotating machine with bearing seals

Growing community of inventors

Chiba, Japan

Hidekazu Shiomi