T-shaped impedance micropore multi-combination exhaust silencing device

Abstract

The invention discloses a T-shaped impedance micropore multi-combination exhaust silencing device. The T-shaped impedance micropore multi-combination exhaust silencing device comprises a metal frame,wherein a stainless steel skin wraps the surface of the metal frame, the whole metal frame is T-shaped, an air inlet is formed in the tail end of the T-shaped metal frame, exhaust outlets are formed in the left end and the right end of the T-shaped metal frame, resonance boxes cover the side walls and the top face of the interior of the stainless steel skin, a tight box wall is formed, and a second sealing layer is formed. In the device, a metal flow guide wedge faces the air inlet, the left side and the right side of the metal flow guide wedge are provided with a sliding rail and a bullet flow guide column respectively, and the bullet flow guide column is arranged on the sliding rail and can slide along the sliding rail. The resonance boxes, the metal flow guide wedge and the bullet flowguide column are filled with sound absorption materials, and holes are formed in the surfaces of the resonance boxes, the metal flow guide wedge and the bullet flow guide column. According to the device, an expansion type impedance silencing principle is adopted, air can enter the device and can be rapidly expanded by 10 times or above in the channel space of the device, and the air speed is rapidly reduced; and meanwhile, sound waves are refracted along a 90-degree elbow, sound energy is consumed, and noises can be reduced by 45 dB or above.

Description

technical field [0001] The invention belongs to the technical field of sound-absorbing equipment, and relates to a T-shaped impedance microporous multi-combined air-exhausting and sound-absorbing device. Background technique [0002] Grain is stored in the granary. Since the grain contains a certain amount of water, mechanical ventilation is often used to cool it down to prevent it from mildew and rot. Axial flow fans are often used as a safe, efficient and energy-saving method. The running sound of a normal axial flow fan is 70-80 decibels. If the fan runs for a long time, the axial flow fan will produce a sound of up to 120 decibels. Since the geographical location of the granary is mostly close to the residential area, the operation of the axial flow fan will interfere with the normal life of the surrounding residents, especially at night when multiple fans operate together. [0003] Therefore, there is an urgent need for a device that can solve this problem. The current...

AI Technical Summary

Problems solved by technology

[0003] Therefore, there is an urgent need for a device that can solve this problem. At present, the relevant noise reduction and noise reduction devices that are common in the society all use centrifugal glass wool with relatively large porosity. phenomenon, which has a great impact on the surrounding environment. In order to solve such problems and further improve the ability of the device to absorb and reduce noise, a suitable and matching exhaust and noise reduction device was invented based on the modified bamboo aggregate particle sound-absorbing material.

Images