High-air-flow low-noise vertical type mounting axial flow fan for comprehensive pipe rack

Abstract

The invention discloses a high-air-flow low-noise vertical type mounting axial flow fan for a comprehensive pipe rack. The fan comprises an air cylinder, a motor, a hub and blades, the motor is fixedly connected to the interior axis of the air cylinder trough connecting plates, the hub is fixedly connected to an output shaft of the motor, the blades are fixedly connected to the side wall of the hub, the axial flow fan further comprises an air outlet flow equalizing noise elimination guide blade, the air outlet flow equalizing noise elimination guide blade is located at one end of the air cylinder, through the air outlet flow equalizing noise elimination guide blade at one end of the air cylinder, before an air flow generated in the fan flows out of the air cylinder, the air flow firstly flows through the air outlet flow equalizing noise elimination guide blade, a part is a dedicated noise elimination device customized and designed according to the flow and the pressure energy magnitudeof the pneumatic property, a main material comprises a galvanized steel sheet, a galvanized silenced perforated plate and a noise elimination cotton material, the flow equalizing guide blade is madeof the galvanized silenced perforated plate and the noise elimination cotton material, and the sound power noise of the air flow flowing through the fan can be efficiently reduced.

Description

technical field [0001] The invention relates to the technical field of the ventilation system of a comprehensive pipe gallery, and the specific field is a vertically installed axial flow fan with a large air volume and low noise for a comprehensive pipe gallery. Background technique [0002] The ventilation system of the comprehensive pipe gallery is an essential guarantee for the safety of equipment and operators in the pipe gallery. The ventilation system needs to be equipped with a large number of axial flow fans. Since the comprehensive pipe gallery passes through the city center, the noise of fans needs to be strictly controlled. Therefore, the current pipe gallery usually uses fans with a small air volume and a large number. Under normal circumstances, according to the civil structure of the comprehensive pipe gallery, all fans of the ventilation system need to be installed in the top air shaft of the pipe gallery, arranged in a "line" along the top of the pipe gallery...

AI Technical Summary

Problems solved by technology

At present, the diameter of the impeller of the axial flow fan with large air volume is usually more than 2000mm, but the operation noise is relatively large, and the noise at a distance of 1 meter from the fan outlet is usually above 90dB(A). Even if the muffler is used, due to the limitation of the installation space, the noise The sound volume can only be reduced by 12-15dB(A) at most, which cannot meet the environmental noise requirements below 65dB(A).

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