| 摘要 |
PURPOSE:To improve the performance and the assemblability by providing a step between a fan guide and an impeller cover. CONSTITUTION:In a motor fan 22, first stage fan guide 23 is fitted with the first stage impeller cover 28 while the outercircumferential section is fitted with the outercircumferential face. Similarly, second stage fan guide 23a and second stage impeller cover 28a are secured. Consequently, it can be assembled simply by pressure inserting the impeller cover through a press and mounting a fan guide, while the flow-path cross-section of volute chamber can be made smaller than the step 12, resulting in simultaneous improvement of performance and assemblability.
|
