CN215486853U - Noise reduction structure for air outlet of centrifugal fan - Google Patents

Abstract

The utility model discloses a noise reduction structure of an air outlet of a centrifugal fan, which relates to the technical field of centrifugal fans and reduces the noise of the air outlet, and the technical scheme is characterized in that: the noise reduction pipe is arranged on the outer wall of the air outlet pipe of the centrifugal fan body by the aid of the air outlet pipe and the noise reduction pipe which are arranged at one end of the centrifugal fan body in a sleeved mode, one end of the noise reduction pipe is flush with one end of the air outlet pipe, the other end of the noise reduction pipe is fixed with the outer wall of the centrifugal fan body in an inclined transition mode, and a noise reduction piece is arranged between the air outlet pipe and the noise reduction pipe.

Description

Noise reduction structure for air outlet of centrifugal fan

Technical Field

The utility model relates to the technical field of centrifugal fans, in particular to a noise reduction structure of an air outlet of a centrifugal fan.

Background

The centrifugal fan is a driven fluid machine which increases the pressure of gas and discharges the gas by means of input mechanical energy.

The existing centrifugal fan mainly comprises a bracket, a shell, an air inlet, an air outlet, an impeller, a power device and the like, but in the working process of the centrifugal fan, the noise generated at the air outlet is large, and if a person works in a noise environment for a long time, the physical and mental health of workers is easily damaged.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a noise reduction structure for an air outlet of a centrifugal fan, which has the advantage of reducing the noise of the air outlet.

The technical purpose of the utility model is realized by the following technical scheme: the utility model provides a structure of making an uproar falls in centrifugal fan air outlet, puts the pipe of making an uproar falls in centrifugal fan body air-out outer wall including setting up the play tuber pipe, the cover of centrifugal fan body one end, fall the pipe one end of making an uproar and flush with play tuber pipe one end, the other end and the slope of centrifugal fan body outer wall transition are fixed, it falls the piece of making an uproar to go out to be equipped with between tuber pipe and the pipe of making an uproar.

Through adopting above-mentioned technical scheme, the setting of falling the pipe of making an uproar is convenient for install and falls the piece of making an uproar, falls the pipe setting of making an uproar this moment and is outside the air-out pipe for the wind energy that blows off from the air-out pipe is enough the noise reduction, and the staff's work of being convenient for satisfies some occasions that have the requirement to sound simultaneously and uses.

Preferably: the noise reduction part comprises a plurality of sound absorption holes formed in the wall of the air outlet pipe, a sound absorption cotton layer is filled between the air outlet pipe and the noise reduction pipe, and a sealing part for sealing the gap between the air outlet pipe and the noise reduction pipe is arranged at one end, far away from the centrifugal fan body, of the air outlet pipe and the noise reduction pipe.

Preferably: the cross section of the end, away from the centrifugal fan body, of the air outlet pipe and the noise reduction pipe is square, the sealing piece comprises an annular sealing plate which is detachably connected to the air outlet pipe through a connecting piece, and the sealing plate seals a gap between the air outlet pipe and the noise reduction pipe.

Preferably: the connecting piece is including setting up a plurality of connecting plates at the tuber pipe outer wall periphery, the connecting plate is located the closing plate below, wear to be equipped with the locking screw that gets into in the connecting plate on the closing plate, locking screw and connecting plate threaded connection just wear out the connecting plate, the closing plate is close to the one end downwarping extension of falling the noise pipe, and the position that extends this moment extends along falling the noise pipe inner wall and extends, a plurality of fastening screw are worn to be equipped with by falling noise pipe outer wall circumference, fastening screw passes the part threaded connection of falling noise pipe and closing plate downwardly extending, fastening screw wears out the closing plate bending portion.

Preferably: the outer wall of the air outlet pipe is provided with an annular pressing plate, each connecting plate is arranged on the pressing plate, and the pressing plates are fixed on the outer wall of the air outlet pipe through first screws.

Preferably: the air outlet pipe comprises a first pipe connected with the centrifugal fan body and a second pipe detachably connected to one end, far away from the centrifugal fan body, of the first pipe, and the sound absorption hole is formed in the second pipe.

Preferably: the second pipe is detachably connected with the inner wall of the first pipe through a connecting screw.

In conclusion, the utility model has the following beneficial effects: the setting of falling the pipe of making an uproar is convenient for install and falls the piece of making an uproar, and the pipe of making an uproar setting is outside the air-out pipe this moment for the wind energy that blows off from in the air-out pipe enough noise reduction, the staff work of being convenient for satisfies some occasions that have the requirement to sound simultaneously and uses.

Drawings

FIG. 1 is a schematic structural view of the present embodiment;

FIG. 2 is a schematic structural diagram of the present embodiment for embodying sound absorbing holes;

FIG. 3 is a schematic structural view of the present embodiment for showing the sound-absorbing cotton layer;

fig. 4 is a schematic structural view for embodying the closing plate of the present embodiment.

In the figure: 1. a centrifugal fan body; 11. an air outlet pipe; 111. a first tube; 112. a second tube; 12. a noise reduction tube; 13. a sound absorption hole; 14. a sound absorbing cotton layer; 15. a closing plate; 151. a connecting plate; 152. locking the screw; 153. fastening screws; 16. and (7) pressing a plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The utility model provides a structure of making an uproar falls in centrifugal fan air outlet, is put at the denoiser 12 of 1 play tuber pipe 11 outer wall of centrifugal fan body including setting up play tuber pipe 11, the cover in 1 one end of centrifugal fan body, and denoiser 12 one end flushes with play tuber pipe 11 one end, and the other end is fixed with the slope transition of 1 outer wall of centrifugal fan body, goes out to be equipped with between tuber pipe 11 and the denoiser 12 and falls the piece of making an uproar. The air outlet pipe 11 at one end of the centrifugal fan body 1 is provided with an existing centrifugal fan and is of an existing structure.

As shown in the figures 1 and 2, the noise reduction piece is convenient to mount and the noise reduction pipe 12 is arranged outside the air outlet pipe 11, so that the wind blown out of the air outlet pipe 11 can reduce the noise, the work of workers is facilitated, and the requirement of occasions with requirements on sound is met.

As shown in fig. 2 and fig. 3, the noise reduction part includes a plurality of sound absorption holes 13 formed in the wall of the air outlet pipe 11, a sound absorption cotton layer 14 is filled between the air outlet pipe 11 and the noise reduction pipe 12, and a sealing part for sealing the gap between the air outlet pipe 11 and the noise reduction pipe 12 is disposed at one end of the air outlet pipe 11 and the noise reduction pipe 12 away from the centrifugal fan body 1. When air-out in the play tuber pipe 11, inhale the cotton layer of sound 14 and be located play tuber pipe 11 and fall between the pipe 12 of making an uproar, the noise is absorbed through inhaling cotton layer 14 of sound hole 13 quilt sound this moment, and then reduces the noise when going out wind in the play tuber pipe 11, and the setting up of closing member makes that it is located between play tuber pipe 11 and the pipe 12 of making an uproar to inhale the cotton layer 14 of sound that is stable on sound cotton layer 14 to and convenient to detach.

As shown in fig. 2 and 3, the cross section of one end of the air outlet pipe 11 and the noise reduction pipe 12 far away from the centrifugal fan body 1 is square, the closing member comprises an annular closing plate 15 detachably connected to the air outlet pipe 11 through a connecting member, and the closing plate 15 closes a gap between the air outlet pipe 11 and the noise reduction pipe 12. The setting of annular closing plate 15 is convenient for go out the air-out of tuber pipe 11, will inhale the cotton layer 14 of sound simultaneously and compress tightly between tuber pipe 11 and the pipe 12 of making an uproar that falls, and square tuber pipe 11 and the pipe 12 of making an uproar that fall are convenient for install closing plate 15 this moment.

Referring to fig. 2 and 3, the connecting member includes a plurality of connecting plates 151 disposed on the periphery of the outer wall of the air outlet duct 11, the connecting plates 151 are located below the closing plate 15, locking screws 152 penetrating into the connecting plates 151 are disposed on the closing plate 15, the locking screws 152 are in threaded connection with the connecting plates 151 and penetrate out of the connecting plates 151, at this time, the closing plate 15 is fixed on the air outlet duct 11 by the locking screws 152, the connecting plates 151 are disposed so as to fix the closing plate 15, the locking screws 152 penetrate out of the connecting plates 151 to contact with the sound-absorbing cotton layer 14, thereby stabilizing the position of the sound-absorbing cotton layer 14 between the air outlet duct 11 and the noise-reducing duct 12, one end of the closing plate 15 close to the noise-reducing duct 12 bends and extends downwards, at this time, the extending portion extends along the inner wall of the noise-reducing duct 12, a plurality of fastening screws 153 are disposed on the outer wall of the noise-reducing duct 12 in the circumferential direction, the fastening screws 153 penetrate through the noise-reducing duct 12 and are in threaded connection with the portion of the closing plate 15 extending downwards, the fastening screw 153 penetrates through the bent portion of the closing plate 15, at this time, after the fastening screw 153 is connected with the closing plate 15, the fastening screw 153 also penetrates through the bent portion of the closing plate 15, so that the fastening screw 153 is also in contact with the sound absorbing cotton layer 14, and at this time, the fastening screw 153 and the locking screw 152 are distributed in a mutually perpendicular manner, so that a relatively perpendicular limiting force is provided for the sound absorbing cotton layer 14, and the sound absorbing cotton layer 14 is fixed stably.

Referring to fig. 2 and 4, the outer wall of the air outlet pipe 11 is provided with an annular pressing plate 16, each connecting plate 151 is arranged on the pressing plate 16, and the pressing plate 16 is fixed on the outer wall of the air outlet pipe 11 through a first screw. For example, the first screw is installed on the end wall of the air outlet pipe 11, and the pressing plate 16 is detachably connected to the outer wall of the air outlet pipe 11, so that the sound absorption cotton layer 14 is convenient to install on one hand, and the connecting plate 151 is convenient to replace on the other hand.

As shown in fig. 2 and 4, the air outlet pipe 11 includes a first pipe 111 connected to the centrifugal fan body 1 and a second pipe 112 detachably connected to an end of the first pipe 111 far from the centrifugal fan body 1, and the sound absorbing hole 13 is disposed on the second pipe 112. At this time, the second tube 112 of the sound absorbing hole 13 with different sizes can be replaced according to the requirement, so as to meet the use requirement. The second pipe 112 is detachably connected with the inner wall of the first pipe 111 through a connecting screw, and the installation and the disassembly are convenient.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims (7)

1. The utility model provides a structure of making an uproar falls in centrifugal fan air outlet which characterized by: including setting up play tuber pipe (11), the cover of centrifugal fan body (1) one end put at the noise reduction pipe (12) of play tuber pipe (11) outer wall of centrifugal fan body (1), noise reduction pipe (12) one end flushes with play tuber pipe (11) one end, and the other end is fixed with centrifugal fan body (1) outer wall slope transition, it falls the piece of making an uproar to go out to be equipped with between tuber pipe (11) and the noise reduction pipe (12).

2. The noise reduction structure for the air outlet of the centrifugal fan as claimed in claim 1, wherein: the noise reduction part comprises a plurality of sound absorption holes (13) formed in the wall of the air outlet pipe (11), a sound absorption cotton layer (14) is filled between the air outlet pipe (11) and the noise reduction pipe (12), and the air outlet pipe (11) and the noise reduction pipe (12) are provided with a sealing part for sealing the gap between the air outlet pipe (11) and the noise reduction pipe (12) at the end far away from the centrifugal fan body (1).

3. The noise reduction structure for the air outlet of the centrifugal fan as claimed in claim 2, wherein: the cross section of the one end of centrifugal fan body (1) is kept away from to go out tuber pipe (11) and fall and manage (12) is square, the closure piece includes can dismantle annular closed plate (15) of connection on going out tuber pipe (11) through the connecting piece, closed plate (15) seal play tuber pipe (11) and fall and manage (12) between the clearance of making an uproar.

4. The noise reduction structure for the air outlet of the centrifugal fan as claimed in claim 3, wherein: the connecting piece is including setting up a plurality of connecting plates (151) at air-out pipe (11) outer wall periphery, connecting plate (151) are located closing plate (15) below, wear to be equipped with locking screw (152) that get into in connecting plate (151) on closing plate (15), locking screw (152) and connecting plate (151) threaded connection just wear out connecting plate (151), the one end downwarping extension that closing plate (15) are close to noise reduction pipe (12), the position that extends this moment extends along noise reduction pipe (12) inner wall, noise reduction pipe (12) outer wall circumference is worn to be equipped with a plurality of fastening screw (153), fastening screw (153) pass noise reduction pipe (12) and closing plate (15) downwardly extending's partial threaded connection, fastening screw (153) are worn out closing plate (15) curved portion.

5. The noise reduction structure for the air outlet of the centrifugal fan as claimed in claim 4, wherein: go out tuber pipe (11) outer wall and be equipped with annular clamp plate (16), each connecting plate (151) all set up on clamp plate (16), clamp plate (16) are fixed at play tuber pipe (11) outer wall through first screw.

6. The noise reduction structure for the air outlet of the centrifugal fan as claimed in claim 2 or 4, wherein: the air outlet pipe (11) comprises a first pipe (111) connected with the centrifugal fan body (1) and a second pipe (112) detachably connected to one end, far away from the centrifugal fan body (1), of the first pipe (111), and the sound absorbing hole (13) is formed in the second pipe (112).

7. The noise reduction structure for the air outlet of the centrifugal fan as claimed in claim 6, wherein: the second pipe (112) is detachably connected with the inner wall of the first pipe (111) through a connecting screw.

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