| 摘要 |
PURPOSE:To achieve a higher accuracy in the measurement of boosting power or the like, by enabling fine adjustment of a plurality of supporting surfaces divided circumferentially with respect to a shell cylinder. CONSTITUTION:In a shell cylinder 31 of a motor case, a plurality of supporting surfaces 55 are formed on a circular-arc surface facing it separated with an air clearance 6. Then, a support base 50 finely adjusts supporting surfaces 55 by deflecting a correcting ring 51 when the section of the shell cylinder 31 is not truly round. In other words, the radius of the ring 51 is reduced by screwing down a push bolt 71 while it is extended by turning a nut 72 of a pull stud 70 to lift it and the ring 51 can follow the shell cylinder 31 by adjusting it in this manner. This can uniformize the air clearance between the supporting surfaces 55 of respective supporting members fixed on the ring 51 and thus, jetting the high pressure air out of the supporting surfaces 55 can elevate the accuracy of the boosting power. |
