| 摘要 |
PROBLEM TO BE SOLVED: To realize a structure which can improve efficiencies of rotating and stopping an impeller 2. SOLUTION: A width size in the radial direction of an annular space 20b arranged between an outer peripheral surface of an impeller main body 4 and an inner peripheral surface of a housing 6b is enlarged over the whole circumference. Consequently, a turbine air nozzle or nozzles 22 and a brake air nozzle or nozzles 23 are projected from the inner peripheral surface of the housing 6b and openings (air injection holes) at the top ends of the nozzles 22, 23 are made adjacent and opposite to the outer peripheral surface of the impeller main body 4. Employing such a structure makes it possible to solve the problem. COPYRIGHT: (C)2007,JPO&INPIT
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