| 摘要 |
PURPOSE: To vary the inlet angle of a moving blade without changing a ratio between the inside and outside diameters of a diffuser and a relative position with an impeller. CONSTITUTION: A back board is divided into an inner wheel 21 and an outer wheel 22 relatively turnable to the inner wheel. A moving blade 3 is divided into a front moving vane 31 and a rear moving vane 32, and the rear edge of the front moving vane 31 and the front edge of the rear moving vane 32 are turnably intercoupled by means of a pin 4. The front edge of the front moving blade 31 is supported at the inner wheel 21 turnably around a support axis 5 and the rear edge of the rear moving vane 32 is supported at an outer wheel 22 around a support 6. |
