A Suspended Tunnel Ventilation Equipment With Noise Reduction Device

Abstract

The invention provides a suspended tunnel ventilation equipment and silencer device, which includes an upper axial flow fan, an upper air inlet duct, a tunnel, a lower air inlet duct and a lower axial flow fan. The upper axial flow fan is connected to the tunnel through a suspension bracket, and the suspension bracket There are left and right shock absorbers installed on the left and right sides respectively. The outer surface of the upper axial flow fan is attached with a layer of sound insulation cover, and the outer surface of the lower axial flow fan is attached with a layer of sound insulation cover. Compared with the existing technology, The invention has the following beneficial effects: when the upper axial flow fan or the lower axial flow fan is in operation, the rotation noise and eddy current noise caused by the rotation of the impeller are filtered and absorbed by the sound insulation cover. After testing and comparison, the noise can be effectively eliminated. The design Ingeniously, it improves market competitiveness and achieves the purpose of simple structure and reasonable design.

Description

technical field [0001] The invention relates to a suspended tunnel ventilation device with a noise reduction device, which belongs to the field of integral noise reduction device equipment for an axial flow fan specially used for tunnel construction. Background technique [0002] Tunnel large-scale axial flow fan is a special blower and exhaust fan for vertical (inclined) shaft ventilation in extra-long tunnels. It is suitable for semi-horizontal, full-horizontal and tunnel auxiliary ventilation methods. According to the specific performance parameters of the design, the installation angle of the blades can be adjusted by using different impeller diameters or the same impeller diameter to meet the air supply and exhaust requirements of different air volumes and pressures. . Fans for tunnel construction. [0003] Tunnel construction fans are mainly used to discharge during tunnel construction. Due to the explosion of explosives, the use of internal combustion engines, and t...

AI Technical Summary

Problems solved by technology

Generally, the noise source of the fan is mainly the rotation noise and eddy current noise caused by the rotation of the impeller; usually, the noise reduction structure of the fan is mainly to install silencers before and after the fan, which can reduce the noise to a certain extent, but the noise reduction effect is not obvious , causing greater physical damage to construction workers; working in such an environment for a long time may cause occupational diseases such as tinnitus, dizziness, weakness of limbs, inattention, and easy to get angry for no reason

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