CN209444626U - A kind of main fan noise eliminating silencer - Google Patents

Abstract

A kind of main fan noise eliminating silencer, including shell, shell both ends are respectively arranged with air inlet and air outlet, inner walls are provided with silencing pot, parallel and interval is fixedly connected with several noise elimination walls in silencing pot, each noise elimination wall includes the wall surrounded by noise elimination panel, it is parallel and be arranged at intervals with several abatvoixs in wall, each wavy structure in abatvoix section, filled with the sound absorbing layer between each abatvoix in wall, the fixed frame there are two being fixedly connected between noise elimination wall and air outlet is spaced in silencing pot, several sound-absorbing rings have been arranged concentrically between two fixed frames, the axis of the axis of each sound-absorbing ring and silencing pot is on the same line.The utility model is compact-sized, the operation is stable, noise elimination effect is good, noise reduction is high.

Description

A main fan noise reduction device

technical field

The utility model belongs to the technical field of mine ventilation equipment, in particular to a noise reduction device for a main fan fan.

Background technique

The ventilation system is one of the eight underground systems in mines. It is an equipment system with frequent safety accidents. The main fan of coal mines undertakes the important task of mine ventilation and is the most important equipment and link to ensure mine safety and production. During the working process of the main fan fan, the noise of the main fan fan is large, which brings noise pollution to the production environment, which not only affects the production work, but also is not conducive to the health of the staff. In addition, the noise will cause resonance , thereby affecting production safety. The existing main fan has low silencing capacity for noise, relatively single internal silencing structure, and poor silencing effect.

Utility model content

In order to solve the deficiencies in the prior art, the utility model provides a main fan noise reduction device with compact structure, stable operation, good noise reduction effect and high noise reduction capacity.

In order to solve the above technical problems, the utility model adopts the following technical scheme: a main fan noise reduction device, including a housing, the two ends of the housing are respectively provided with an air inlet and an air outlet, and the inner wall of the housing is provided with a muffler , there are several sound-absorbing walls parallel and fixedly connected at intervals in the sound-absorbing cylinder, each sound-absorbing wall includes a wall surrounded by sound-absorbing panels, and a number of sound-absorbing panels are arranged in parallel and at intervals in the wall, and the cross-section of each sound-absorbing panel is wavy Shaped structure, the wall is filled with a sound-absorbing layer between the sound-absorbing panels, and the interior of the muffler is fixedly connected with two fixing frames between the sound-absorbing wall and the air outlet, and the two fixing frames are concentrically arranged with A plurality of sound-absorbing rings, the axes of each sound-absorbing ring and the axis of the muffler are on the same straight line.

The central inner wall of the air inlet protrudes inward to form an arc surface structure.

The outer wall of each sound-absorbing wall is fixedly connected with a plurality of drainage plates at intervals along its length direction, each drainage plate is arranged in parallel and obliquely, and the drainage plates on two adjacent walls are arranged alternately.

Each sound-absorbing ring is respectively set in a tapered structure, and the diameter of the air inlet of each sound-absorbing ring is larger than the diameter of the air outlet.

The muffler cylinder, the muffler panel, the sound-absorbing board and the sound-absorbing ring are all made of perforated plates, and the attracting layer is made of porous materials.

By adopting the above technical scheme, the utility model has the following advantages:

1. The utility model adopts the anechoic wall to reduce the noise. The noise enters the anechoic wall through the anechoic panel, and each sound-absorbing panel in the anechoic wall absorbs the noise. Reflection, so as to absorb and attenuate the sound energy, greatly improving its noise reduction. The air flow passes through each sound-absorbing wall and enters each sound-absorbing ring, and each sound-absorbing ring is set concentrically to further absorb noise.

2. The drainage plates installed outside the wall of each anechoic wall play a role in draining the airflow, and lengthen the flow path of the airflow, so that the noise is fully absorbed by the anechoic wall.

3. Each sound-absorbing ring is set in a tapered structure, and the diameter of the air inlet of each sound-absorbing ring is larger than the diameter of the air outlet, which improves the noise reduction of the sound-absorbing ring.

Description of drawings

Fig. 1 is the top view structural representation of the utility model;

Fig. 2 is the structural representation of the anechoic wall in the utility model;

Fig. 3 is a sectional view of A-A in Fig. 1 .

Detailed ways

As shown in Figure 1-3, a main fan noise reduction device of the present invention includes a housing 1, the two ends of the housing 1 are respectively provided with an air inlet 2 and an air outlet 3, and the inner wall of the housing 1 is provided with A muffler tube 4, inside the muffler tube 4 are fixedly connected with a number of muffler walls parallel and spaced apart, each muffler wall includes a wall body 5 surrounded by muffler panels, and a number of sound-absorbing panels are arranged parallelly and spaced apart in the wall body 5 6. The cross-section of each sound-absorbing panel 6 has a wave-shaped structure. The wall 5 is filled with a sound-absorbing layer 7 located between each sound-absorbing panel 6 . Between the fixed frame 8, a number of sound-absorbing rings 9 are concentrically arranged between the two fixed frames 8, and the axis of each sound-absorbing ring 9 is on the same straight line as the axis of the muffler cylinder 4.

The middle inner wall of the air inlet 2 protrudes inward to form an arc surface structure.

The outside of the wall body 5 of each sound-absorbing wall is fixedly connected with a number of drainage plates 10 at intervals along its length direction.

Each sound-absorbing ring 9 is respectively arranged in a tapered structure, and the diameter of the air inlet of each sound-absorbing ring 9 is larger than the diameter of the air outlet.

The muffler cylinder 4, the muffler panel, the sound-absorbing board 6 and the sound-absorbing ring 9 are all made of perforated plates, and the attracting layer is made of porous materials.

When the utility model is in use, the airflow and noise enter the muffler tube 4 through the air inlet 2, and the airflow passes between each muffler wall. It plays the role of drainage. When the airflow passes through, the noise enters the anechoic wall through the anechoic panel, and each sound-absorbing panel 6 in the anechoic wall absorbs the noise. Reflection, thereby absorbing and attenuating the sound energy, greatly improving its noise reduction. The air flow passes through each sound-absorbing wall and enters each sound-absorbing ring 9, and each sound-absorbing ring 9 is concentrically arranged to further absorb noise.

This embodiment does not impose any formal restrictions on the shape, material, structure, etc. of the utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the utility model belong to the technology of the utility model. protection scope of the program.

Claims (5)

1. A noise reduction and noise reduction device for a main fan fan, characterized in that: it comprises a housing, the two ends of the housing are respectively provided with an air inlet and an air outlet, and the inner wall of the housing is provided with a muffler, parallel and spaced in the muffler There are several sound-absorbing walls fixedly connected, and each sound-absorbing wall includes a wall surrounded by sound-absorbing panels, and a number of sound-absorbing panels are arranged in parallel and at intervals in the wall. The sound-absorbing layer is located between the sound-absorbing panels, and there are two fixing frames between the sound-absorbing wall and the air outlet fixedly connected at intervals in the sound-absorbing tube, and several sound-absorbing rings are concentrically arranged between the two fixing frames. The axis is on the same straight line as the axis of the muffler. 2 . The noise reduction device for the main fan according to claim 1 , wherein the middle inner wall of the air inlet protrudes inward to form an arc surface structure. 3 . 3. The noise reduction and noise reduction device for the main fan according to claim 1 or 2, characterized in that: the outer wall of each sound-absorbing wall is fixedly connected with a plurality of drainage plates at intervals along its length direction, and each drainage plate is parallel and inclined Setting, the drainage plates on two adjacent walls are arranged in a staggered manner. 4. The noise reduction device for the main fan according to claim 3, characterized in that: each sound-absorbing ring is respectively arranged in a tapered structure, and the diameter of the air inlet of each sound-absorbing ring is larger than the diameter of the air outlet. 5. The noise reduction and noise reduction device for the main fan according to claim 4, characterized in that: the noise reduction cylinder, the noise reduction panel, the sound-absorbing panel and the sound-absorbing ring are all made of perforated plates, and the attracting layer is made of porous materials. to make.