LOW NOISE HIGH EFFICIENCY AXIAL FLOW BLOWER

摘要

PURPOSE: To create a state similar to a state wherein axial flow blowers are arranged in parallel and to generate a given air flow and air pressure with high efficiency by a method wherein a rotary shaft forms a hollow fixed cylinder, main moving vanes are rotatably disposed, and a high speed shaft or a high speed shaft is arranged in a central part. ;CONSTITUTION: First stage-third stage main moving vanes 2 and static vanes 3 are rotatably disposed around fixed cylinders 6 (6a-6c) through a bearing. Fourth and fifth state auxiliary moving vanes 7 are disposed in a frame with a gear, through which air flows in and out, in a cylindrical middle speed shaft 4 on the outer periphery of which a number of impellers 4b are disposed. A high speed shaft 5 provided with a number of impellers 5a is disposed in a middle speed shaft 4. The two shafts 4 and 5 are rotated in a speed-changed state by a reduction gear 11 through running of a motor 10. By transmitting rotation of the gear 7a of an auxiliary moving vane 7 to each main moving vane 2 through a reduction gear 8, the number of revolutions of the main moving vane 2 is regulated. This constitution causes rotation of, for example, the main moving vane 2 at 500-1000 rpm, the middle speed shaft at 1500-3000rpm, and the high speed shaft 5 at 4000-6000rpm.;COPYRIGHT: (C)1995,JPO