| 摘要 |
PURPOSE:To obtain a high pressure ratio by providing plural inside guide pieces for reducing the flow rate component in the rotating direction of an impeller in a main flow passage which is formed with the outer peripheral face of an annular guide member and the inner peripheral face of a housing. CONSTITUTION:An impeller 8 is provided in a main flow passage 3 which is formed with the outer peripheral face of an annular guide member 7 and the inner peripheral face of a housing 1. Also, plural inside guide pieces 9 for reducing the flow rate component in the rotating direction of the impeller 8 are provided in the main flow passage 3. Thereby, the flow of a gaseous body is forcedly corrected by the inside guide pieces 9, increasing the number of times of crossing the impeller 8, to attain a high pressure ratio.
|
