Hybrid Design Method for High-efficient and Low-Noise Multiple-sectioned Impeller of Backward-bladed Turbo Blower

摘要

The present invention relates to a design method and a low noise implementation method of a turbo-type rear-wing three-dimensional impeller used in a centrifugal blower (fan) or a scrollless plenium blower (fan), in particular, the three-dimensional impeller and two-dimensional impeller unit shroud and back plate It combines in the middle height of to overcome the difficulty of manufacturing the injection mold of the three-dimensional impeller to achieve high efficiency, and also to reduce the low noise and load noise after applying the lean angle corresponding to 2.5 dimensions in the low noise method Design method, the rear curvature has more than one curvature radius other than the curvature on the rotating surface so that lift fluctuation caused by the vortex generated in the rear stage is amplified, and the noise emitted from the rear stage is canceled near the rear stage to make noise emission. Backward curvature design method to weaken, phase of vortex at the low and high point of tooth-shaped rear end is 360˚ Or, it is a multiple of it, and the toothed rear design method for reducing the rear noise by canceling the vortex and the curvature of the leading edge of the shroud inlet are adjusted to adjust the vane pass frequency of the turbofan and its harmonic frequency noise. The present invention relates to a method of realizing low noise by combining a method of designing curvature of the leading edge and the like.;Blower, multiple impeller, turbo type, rear wing, high efficiency, low noise design, rear noise