| 摘要 |
PURPOSE:To hold a turbine wheel without adjusting phase and make centering at high accuracy by so constituting the holding device that when a projected polygonal shaft part of turbine head side is fitted in a square hole of a receiving member, the small diameter part of backside of the turbine always corresponds to a holding click for centering. CONSTITUTION:Number of angles of the square hole 9 of the receiving member 10 of the holding device is set to ten pieces, and on the other hand, number of holding clicks 26 of a collet 25 is set to its half, that is, five pieces. Accordingly, by forming the number of blades in a turbine wheel T, number of small diameter parts T6, and number of angles of projected polygonal shaft part T2 are to ten respectively, when the projected polygonal shaft part T2 is fitted to the square hole 9 of the receiving member 10 at the time of installing the turbine wheel T, holding clicks 26 of the collet 25 and small diameter parts T6 of the turbine wheel T always correspond to each other irrespective of the position, and mounting work is made easy. |
