| 摘要 |
<p>An electric machine cooled with an inflammable cooling fluid has a rotor (2) rotatable about an axis (A1) and stator casing (3) arranged, in part, about the rotor (2) and suitable to define a space (9) occupied by the cooling fluid; the rotor (2) has a shaft (4); at least one excitation electric winding (5) arranged in the space (9); a connecting circuit (6) extending, at least in part, into the shaft (4) in an electrically insulated manner from the shaft (4) and suitable to connect the excitation electric winding (5) with the outside of the stator casing (3); a plurality of holes (14, 15, 16, 17, 18) suitable to define a housing for the connecting circuit (6) and at least a possible exit path for the inflammable cooling fluid; and a first, a second, and a third sealing assembly (26, 27, 28) arranged in series along said path between the connecting circuit (6) and the shaft (4) and a first and a second conduits (22, 41) suitable to connect with the outside respectively a path zone between the second and the third sealing assemblies (27, 28) and a path zone between the first and the second sealing assemblies (26, 27).</p> |
