Barrel type axial flow fan

Abstract

The invention discloses a barrel type axial flow fan which comprises an outer barrel, a driving part, an impeller and a plurality of guide blades. The outer barrel is provided with an air inlet end and an air outlet end, the impeller is installed on an output shaft of the driving part, the impeller comprises a plurality of vanes, the impeller and the guide blades are located in the outer barrel, and the guide blades are located on the side, close to the air outlet end, of the impeller. The two ends of the guide blades are fixedly connected with the inner wall of the outer barrel and a mounting base respectively, the guide blades are arranged on the periphery of the mounting base in a surrounding mode and are circumferentially distributed in an unequal-angle mode, the arrangement angle difference psi of the guide blades is equal to (360 degrees/n)-a*theta, wherein n is the number of the guide blades, theta is the unequal-distance angle difference of the blades, a is a proportionality coefficient larger than 3 and smaller than 6, and theta is larger than 1 degree and smaller than 10 degrees. The axial flow fan has the beneficial effects that the working efficiency of the axial flow fan is guaranteed, meanwhile, the noise intensity at the fundamental frequency is reduced, the advantage of good sound quality is achieved, and the advantage of low interference capacity of noise to people in the working process of the axial flow fan is achieved.

Description

technical field [0001] The invention relates to the technical field of axial flow fans, in particular to a barrel type axial flow fan. Background technique [0002] Axial flow fans are mainly composed of impellers, motors, air casings, and brackets. Although the structure is simple, with the progress of society, axial flow fans with traditional structures can no longer meet people's increasingly higher performance requirements for axial flow fans. Axial flow fans are very versatile and can be used for ventilation in factories, warehouses, offices, residences and other places. The use of axial flow fans includes but is not limited to the above-mentioned facilities. At present, people's requirements for axial flow fans that can move and supply air to people are: (1) The blowing distance of the fan should be far when it is running, so as to meet the blowing needs of people who are far away from the fan. Therefore, the fan speed should be higher. The diversion and flow collecti...

AI Technical Summary

Problems solved by technology

However, during use, the guide vane will also generate noise, which will cause greater interference to people during the working process of the axial flow fan, and affect the experience of use.

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