IMPELLER FOR TURBO FAN, TURBO FAN, AND MANUFACTURING METHOD OF IMPELLER FOR TURBO FAN

摘要

To provide an impeller for a turbo fan which efficiently exhausts exhaust gas, is easily manufactured, prevents deterioration of strength, and reduces the possibility of damage.SOLUTION: An impeller 4 has: a discoid main plate 10; a plate-like shroud 20 which is provided facing the main plate 10 so as to overlap with the main plate 10 when viewed from a center axis direction of the main plate 10; an intake hole 40 which is provided at the shroud 20 and opens in a center axis direction; an exhaust hole 50 which is provided between the main plate 10 and the shroud 20 and opens in a direction perpendicular to the center axis direction; and an impeller 30 which is provided between the main plate 10 and the shroud 20, is connected to the main plate 10 and the shroud 20, suctions exhaust gas from the intake port 40 and exhausts the exhaust gas from the exhaust hole 50 when rotating. The main plate 10, the shroud 20, and the impeller part 30 are integrally formed without having joint parts and parting lines to each other.SELECTED DRAWING: Figure 3