CN219911301U - A noise reduction structure for the air outlet of a centrifugal fan - Google Patents

Abstract

The utility model discloses a centrifugal fan air outlet noise reduction structure, which includes a centrifugal fan main body and an air outlet duct. The air outlet duct is installed on the centrifugal fan main body. The air outlet duct is used to discharge the noise generated by the operation of the centrifugal fan main body. For air flow, the top and bottom of the inner wall of the air outlet pipe are fixedly connected with inclined blocks. The utility model realizes the mutual cooperation of the main body of the centrifugal fan, the air outlet pipe, the slope block, the soft washer, the noise reduction bag, the cushion block, the first noise reduction pad, the flow blocking and noise reduction composition, the flow guide block and the second noise reduction pad. A noise reduction structure at the air outlet of a centrifugal fan allows the strong wind entering the air outlet duct to directly impact the noise reduction bag and the soft washer. In this way, the wind impact will be weakened, effectively preventing the air outlet duct from producing noise due to the impact of strong wind. Strong winds will also be guided by the deflection blocks. Noise reduction pads 1 and 2 can also be very good at silencing the noise. The silencing orifice plates can also be used for silencing. The wind guided by the guide plates will blow the cloth strips, weakening the wind again and effectively reducing the noise. noise.

Description

A noise reduction structure for the air outlet of a centrifugal fan

Technical field

The utility model relates to the technical field of centrifugal fan noise reduction, specifically a noise reduction structure for a centrifugal fan air outlet.

Background technique

The centrifugal fan is a machine that relies on input mechanical energy to increase the gas pressure and discharge the gas. It is a driven fluid machine. Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and draft induction in boilers and industrial furnaces. In the existing technology, the outlet of centrifugal fans is not used. Effective measures are taken to eliminate noise. Fast-flowing strong winds directly hitting the air outlet duct will produce larger noises. Strong winds directly discharge the outside air from the air outlet ducts, because the vibration of the pipes and the alternating rapid flow of air will also produce larger noises. Noise, which will seriously affect the working environment of staff.

Utility model content

The purpose of this utility model is to provide a noise reduction structure for a centrifugal fan air outlet to solve the problems raised in the above background technology.

In order to achieve the above purpose, the present utility model provides the following technical solution: a centrifugal fan air outlet noise reduction structure, including a centrifugal fan main body and an air outlet pipe. The air outlet pipe is installed on the centrifugal fan main body. The air outlet pipe is In order to discharge the air flow generated by the main body of the centrifugal fan, the top and bottom of the inner wall of the air outlet duct are fixedly connected with slope blocks, the inner wall of the air outlet duct is fixedly connected with a soft washer, and the inner wall of the soft washer is fixedly connected. There is a noise reduction bag, and the top and bottom of the inner wall of the air outlet pipe are fixedly connected with pads. The pad is connected to a noise reduction pad, and the noise reduction pad is connected to a flow blocking and noise reduction component.

Optionally, a flow guide block is also included, which is arranged inside the air outlet duct, and the front and rear sides of the flow guide block are respectively fixedly connected to the front and rear sides of the inner wall of the air outlet duct, and the side surfaces of the flow guide block It is equipped with two noise reduction pads.

Optionally, the soft gasket is specifically a sponge gasket.

Optionally, the noise reduction bag is specifically a soft noise reduction cloth bag, with both sides open.

Optionally, the first and second noise reduction pads are specifically sound-absorbing cotton pads.

Optionally, the flow blocking and noise reduction components include:

Silencer orifice plate, fixedly connected to the pad;

A guide plate, fixedly connected to the sound-absorbing orifice plate;

Cloth strips are fixedly connected to the guide plate.

Compared with the existing technology, the beneficial effects of this utility model are as follows:

The utility model realizes the mutual cooperation of the main body of the centrifugal fan, the air outlet pipe, the slope block, the soft washer, the noise reduction bag, the cushion block, the first noise reduction pad, the flow blocking and noise reduction composition, the flow guide block and the second noise reduction pad. A noise reduction structure at the air outlet of a centrifugal fan allows the strong wind entering the air outlet duct to directly impact the noise reduction bag and the soft washer. In this way, the wind impact will be weakened, effectively preventing the air outlet duct from producing noise due to the impact of strong wind. Strong winds will also be guided by the deflection blocks. Noise reduction pads 1 and 2 can also be very good at silencing the noise. The silencing orifice plates can also be used for silencing. The wind guided by the guide plates will blow the cloth strips, weakening the wind again and effectively reducing the noise. noise.

Description of the drawings

Figure 1 is a structural cross-sectional view of the front view of the utility model;

Figure 2 is a structural cross-sectional view of the utility model's air outlet duct, bevel block, soft washer, noise reduction bag, cushion block, noise reduction pad 1, 8 flow blocking and noise reduction components, flow guide block and noise reduction pad 2 front view;

Figure 3 is a structural cross-sectional view of Beiyue's new air outlet duct, bevel block, soft washer, cushion block, noise reduction pad 1 and noise reduction pad 2 top view;

Figure 4 is a schematic structural diagram of a top view of the guide plate and cloth strips of the present utility model;

Figure 5 is a schematic structural diagram of a three-dimensional view of the noise reduction bag of the present utility model.

In the picture: 1 centrifugal fan main body, 2 air outlet duct, 3 slope block, 4 soft washer, 5 noise reduction bag, 6 cushion block, 7 noise reduction pad one, 8 flow blocking and noise reduction composition, 801 silencer orifice plate, 802 guide board, 803 cloth strips, 9 guide blocks, 10 noise reduction pads 2.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all implementations. example. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

Please refer to Figure 1-5. A noise reduction structure for a centrifugal fan air outlet includes a centrifugal fan body 1 and an air outlet duct 2. The air outlet duct 2 is installed on the centrifugal fan body 1. The air outlet duct 2 is used to discharge the centrifugal fan body. 1. The air flow generated by work. The top and bottom of the inner wall of the air outlet duct 2 are fixedly connected with a slope block 3. The inner wall of the air outlet duct 2 is fixedly connected with a soft washer 4. The soft washer 4 is specifically a sponge washer. The inner wall of the soft washer 4 There is a noise reduction bag 5 fixedly connected to the top. The noise reduction bag 5 is specifically a soft noise reduction cloth bag with both sides open. The top and bottom of the inner wall of the air outlet pipe 2 are fixedly connected with a pad 6, and the pad 6 is connected with a The noise reduction pad 1 7 , the noise reduction pad 1 7 and the noise reduction pad 2 10 are specifically sound-absorbing cotton pads. The noise reduction pad 1 7 is connected to a flow blocking and noise reduction component 8 , and the flow blocking noise reduction component 8 includes:

The silencer orifice plate 801 is fixedly connected to the cushion block 6 .

The guide plate 802 is fixedly connected to the silencer orifice plate 801.

The cloth strip 803 is fixedly connected to the guide plate 802, and also includes a guide block 9, which is arranged inside the air outlet duct 2, and the front and rear sides of the guide block 9 are fixedly connected to the front and rear sides of the inner wall of the air outlet duct 2 respectively. , a noise reduction pad 2 10 is provided on the side of the flow guide block 9 .

When in use, when strong wind enters the air outlet duct 2, the slope block 3 will guide the wind direction. The strong wind will be weakened when it directly impacts the air outlet duct 2. The impact force will be weakened again when it is transmitted to the soft washer 4. The guide block 9 and the noise reduction pad The setting of the second 10 can break the wind and guide the direction of the wind. The noise reduction pad 210 will buffer, weaken and absorb the wind force. The diverted wind will impact the noise reduction pad 17, and the noise reduction pad 17 will again weaken the wind force. In this way, strong wind will not directly impact the air outlet pipe 2 to avoid the generation of noise. The noise reduction pad 7 and the silencer orifice plate 801 can also silence the noise to avoid the generation of noise. The wind is guided by the guide plate 802 and blows the cloth strip 803 , which can weaken the wind force. Finally, since the noise reduction bag 5 extends out of the air outlet pipe 2 by a certain length, and the noise reduction bag 5 is soft, it will shake due to the wind force. This can weaken the wind force again and avoid the generation of noise.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention. , substitutions and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. The utility model provides a centrifugal fan air outlet structure of making an uproar falls, includes centrifugal fan main part (1) and goes out tuber pipe (2), go out tuber pipe (2) and install on centrifugal fan main part (1), go out tuber pipe (2) and be used for discharging the air current that centrifugal fan main part (1) work produced, its characterized in that: the top and the equal fixedly connected with inclined plane piece (3) of bottom of play tuber pipe (2) inner wall, fixedly connected with cushion circle (4) on the inner wall of play tuber pipe (2), fixedly connected with bag (5) of making an uproar falls on the inner wall of soft packing circle (4), the equal fixedly connected with cushion (6) in top and the bottom of play tuber pipe (2) inner wall, be connected with on cushion (6) and fall pad one (7), fall and be connected with on the pad one (7) of making an uproar and fall and make an uproar and form (8).

2. The noise reduction structure for an air outlet of a centrifugal fan according to claim 1, wherein: the air conditioner further comprises a flow guide block (9) which is arranged in the air outlet pipe (2), the front side and the rear side of the flow guide block (9) are fixedly connected with the front side and the rear side of the inner wall of the air outlet pipe (2) respectively, and a noise reduction pad II (10) is arranged on the side face of the flow guide block (9).

3. The noise reduction structure for an air outlet of a centrifugal fan according to claim 2, wherein: the soft cushion ring (4) is specifically a sponge cushion ring.

4. A centrifugal fan air outlet noise reduction structure according to claim 3, wherein: the noise reduction bag (5) is specifically a soft noise reduction cloth bag, and two sides of the noise reduction cloth bag are in an open state.

5. The noise reduction structure for an air outlet of a centrifugal fan according to claim 4, wherein: the noise reduction pad I (7) and the noise reduction pad II (10) are specifically noise reduction cotton pads.

6. The noise reduction structure for an air outlet of a centrifugal fan according to claim 5, wherein: the choke and noise reduction component (8) comprises:

the silencing pore plate (801) is fixedly connected to the cushion block (6);

a guide plate (802) fixedly connected to the silencing orifice plate (801);

and the cloth strip (803) is fixedly connected to the guide plate (802).