公开(公告)号：US20160308424A1

公开(公告)日：2016-10-20

申请号：US14689912

申请日：2015-04-17

Applicant: General Electric Company

Inventor： Nathaniel Philip Marshall ,  Alexander Gabriel Beckford ,  Eric Steven Buskirk

IPC: H02K15/00 ,  H02K3/487

CPC classification number: H02K15/0006 ,  H02K3/487 ,  H02K15/0018

Abstract: A method of servicing, or repairing a crack in, a dovetail portion of a dynamoelectric machine's rotor coil slot wall. The coil slot wall includes a radial entry surface connected to an inwardly tapered surface. The inwardly tapered surface is connected to an intermediate radial surface. A machining step machines a first groove in the radial entry surface and inwardly tapered surface. The first groove extends linearly to the intermediate radial surface. The first groove is configured so that a smooth and linear surface is created along a length of the first groove. A second machining step machines a second groove in the intermediate radial surface in an orientation substantially perpendicular to the first groove. A portion of the second groove contacts a portion of the first groove. At least one of the first groove and the second groove are configured to remove damaged material from the coil slot wall.

Abstract translation: 在电动机的转子线圈槽壁的燕尾部分维修或修理裂纹的方法。 线圈槽壁包括连接到向内锥形表面的径向进入表面。 向内的锥形表面连接到中间径向表面。 加工步骤在径向进入表面和向内锥形表面中加工第一凹槽。 第一凹槽线性延伸到中间径向表面。 第一槽构造成沿着第一槽的长度形成平滑和线性的表面。 第二加工步骤在基本上垂直于第一凹槽的取向的中间径向表面中加工第二凹槽。 第二槽的一部分接触第一槽的一部分。 第一凹槽和第二凹槽中的至少一个构造成从线圈槽壁去除损坏的材料。