| 摘要 |
<p>According to one embodiment, there is provided a high pressure bushing arranged through by penetrating a stator frame (7) of a rotating electrical machine in which a cooling gas is sealed. The high pressure bushing includes a hollow connecting conductor (11) that has a machine outer side end portion (11B) sealed, and introduces the cooling gas within the machine from a machine inner side end portion (11A), a gas circulation pipe (12) that is arranged in an inner circumference side of the hollow connecting conductor (11) with a first gap (G1), and discharges the cooling gas toward a machine inner side, and an insulating cylinder (13) that is arranged in an outer circumference side of the hollow connecting conductor (11) with a second gap (G2), and electrically insulates the hollow connecting conductor (11) and the stator frame (7), wherein at least a communicating hole (11a, 11b, or 11c) is provided in the hollow connecting conductor (11) and at least a reflux hole (12a, 12b, or 12c) is provided in the gas circulation pipe (12), such that the cooling gas flows in both of the first gap (G1) and the second gap (G2), passes through an inner side of the gas circulation pipe (12), and is discharged to the machine inner side.</p> |
