| 摘要 |
PURPOSE:To enhance the reliability for heat expansion and contraction by interposing an elastic body made of a plastic between a ceramic surface provided with whirl-stop and a metallic fastening surface. CONSTITUTION:First, a metallic plate 8 for fastening having a key 7 is inserted into a pump shaft 6. Next, after an elastic body 9 has been inserted, an impeller made of a ceramic, on the fastening surface 5 of which grooves 11 are provided, is inserted so that the fastening surface is brought into contact with the elastic body 9. And then, the impeller 1 made of a ceramic is tightened with a shaft nut 4 via a plastic-made ring 10 so as to be tightened to the shaft 6. |
