| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a blower runner capable of solving the problem of wear, noise or the deterioration of efficiency caused by exposure of rivet and bolt which join a boss and a back shroud to each other, solving such the problem that a screw part is corroded, is solidly adhered and can not be separated upon the repairing although the boss and shaft are fixed by a nut, and solving such the problem that periodical in-situ repair is indispensable and considerable cost and labor are required since blade plates of the blower runner are severely worn and the loss of production opportunity due to the repair is large. <P>SOLUTION: The exposure part of the rivet and bolt is covered with a hollow ring covered with an anti-wear material and oil and fat is filled into the space of the boss and a key groove, so that the screw of a nut shaft is not corroded and solidly adhered. The blade plate of the blower runner is produced by subjecting a metal plate, a cemented carbide or the like to copper electroplating or Kanigen(R) plating and, by applying liquid flux and casting high chrome cast iron by the use of the Kirkendall effect to perform diffusion joining and prevent the wear. <P>COPYRIGHT: (C)2012,JPO&INPIT |
