| 摘要 |
PURPOSE:To open the winding end part to improve the cooling effect and to simplify the maintenance enhancing the reliability of the squirrel-cage electric rotary machine by a method wherein one end part of a retaining ring being fitted by shrinkage fit on the outer circumferential face of a short-circuit ring is fitted on the outer circumferential part of a core push plate by shrinkage fit at the grade being able to slide during operation. CONSTITUTION:The retaining ring 14 is fitted firmly by shrinkage fit on the outer circumferential face of the short-circuit ring 7 as not to slide during operation, and the core 2 side end part of the retaining ring 14 is fitted bt shrinkage fit on the outer circumferential face of the core keeping plate 3 at the grade being able to slide during operation. Moreover the outside diameter of a balance ring 19 to be provided at the axial end side of the short-circuit ring 7 is made to be small as the same grade with the inside diameter of the short-circuit ring 7. Accordingly because the axial end side of the short-circuit ring 7 is made to open largely, so that the cooling effect is elevated, and the maintenance of a clamping bolt 11 of supporters 9, 10 to attempt the unification of thermal extension in the axial direction becomes to be easy. |
