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    • 4. 发明授权
    • Electrochemical machining process, electrode therefor and turbine bucket with turbulated cooling passage
    • 电化学加工工艺,其电极和涡轮机桶与紊流冷却通道
    • US06416283B1
    • 2002-07-09
    • US09688579
    • 2000-10-16
    • Robert A. JohnsonChing-Pang LeeBin WeiHsin-Pang Wang
    • Robert A. JohnsonChing-Pang LeeBin WeiHsin-Pang Wang
    • F01D508
    • B23H1/04B23H9/10B23H9/14F05B2260/222
    • An electrode having a dielectric coating is patterned to provide axially spaced rows of insulating material on the external surface of the electrode with one or more gaps in the insulating material of each row. The electrode is placed in a preformed hole of a turbine bucket and an electrolyte is provided for flow between the electrode and the walls of the hole. Upon application of an electrical current, portions of the material of the interior wall surface directly opposite the non-insulated portions of the electrode are dissolved, forming grooves. The insulated portions of the electrode leave axially spaced rows of projections extending toward the axis of the hole. The gaps in the rows or projections are axially misaligned. The projections form turbulators in the cooling flow passages of the bucket, enhancing the heat transfer coefficient.
    • 具有电介质涂层的电极被图案化以在电极的外表面上提供轴向隔开的一排绝缘材料,其中每行的绝缘材料中具有一个或多个间隙。 将电极放置在涡轮机桶的预制孔中,并且提供电解质以在电极和孔的壁之间流动。 在施加电流时,直接与电极的非绝缘部分相对的内壁表面的材料部分被溶解,形成凹槽。 电极的绝缘部分沿着孔的轴线离开轴向间隔开的一列突起。 行或突起中的间隙轴向不对准。 这些突起在铲斗的冷却流动通道中形成涡轮,提高了传热系数。