| 摘要 |
PURPOSE: A turbo fan is provided to reduce manufacturing cost and manufacturing time of the turbo fan and to minimize weight of the turbo fan by forming a slimmer blade in the turbo fan. CONSTITUTION: A turbo fan has many blades, which are installed between a main frame and a shroud. A vertical projection surface of the blade has an aerofoil shape. The blade includes a body section(40) formed at both sides thereof with a convex positive pressure surface(41) and a concave negative pressure surface(42). A first turbulent flow preventing section(70) is protruded from the convex positive pressure surface(41) formed at a rear portion of the body section(40), thereby forming a partial positive pressure surface(71). A second turbulent flow preventing section(80) is protruded from the concave negative pressure surface(42) formed at the rear portion of the body section(40), thereby forming a partial negative pressure surface(81). The body section(40) is slimmer.
|
