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    • 16. 发明授权
    • Rotating head mechanism of rotary type AC magnetic flux leakage flaw
detector
    • 旋转式交流磁通泄漏探伤仪旋转头机构
    • US5023550A
    • 1991-06-11
    • US473606
    • 1990-02-01
    • Makoto YamazakiKazumi UedaShinichi IsobeKatsunari Sato
    • Makoto YamazakiKazumi UedaShinichi IsobeKatsunari Sato
    • G01N29/04G01N27/83G01N27/90G01N29/24
    • G01N27/9013G01N27/83G01N2291/044
    • A rotating head mechanism of a rotary type AC magnetic flux leakage flaw detector comprises a rotating disc which has an opening for passing a test piece for flaw detection, mounting frames which are disposed in the rotating disc so as to oppose to each other with the opening located therebetween, shafts which are rotatably disposed across the mounting frames and each of which has external threads of senses opposite to each other at a position on one side of the opening and a position on the other side thereof, a first nut which engages the external thread of one sense in the external threads of each shaft, a second nut which engages the external thread of the other sense in the external threads of each shaft, a first cradle which is coupled to the first nuts, a second cradle which is coupled to the second nuts, a first exciting magnetic poles/detecting probes-assembly which is mounted on the first cradle, a second exciting magnetic poles/detecting probes-assembly which is mounted on the second cradle, and rotation drive means for rotating the shafts. When the shafts are rotated by the rotation drive means, the first and second nuts are moved in a direction in which they come near to each other or away from each other along the shafts, thereby making it possible to change an opposing spacing in a diametrical direction of the opening, between the first and second exciting magnetic poles/detecting probes-assemblies respectively mounted on the first and second cradles.
    • 旋转型交流磁通泄漏探伤仪的旋转头机构包括:旋转盘,其具有用于通过用于探伤的试验片的开口;安装框架,其设置在旋转盘中,以与开口对置地相对; 位于其间的轴可旋转地设置在穿过安装框架上的每一个在开口一侧的位置和另一侧的位置上具有彼此相反的外部感觉线,第一螺母接合外部 在每个轴的外螺纹中具有一种感觉的螺纹,与每个轴的外螺纹中的另一感觉的外螺纹接合的第二螺母,联接到第一螺母的第一支架,第二支架,其联接到 第二螺母,安装在第一支架上的第一激励磁极/检测探针组件,安装在t上的第二激励磁极/检测探头组件 他的第二支架,以及用于旋转轴的旋转驱动装置。 当轴由旋转驱动装置旋转时,第一和第二螺母沿它们彼此靠近或远离轴的方向移动,从而可以改变直径的相对间距 分别安装在第一和第二托架上的第一和第二激励磁极/检测探针组件之间的开口方向。