CN210178660U

CN210178660U - Inlet silencing device of centrifugal fan

Info

Publication number: CN210178660U
Application number: CN201920889142.6U
Authority: CN
Inventors: Xianfeng Hu; 胡贤峰
Original assignee: Suzhou Pan Li Fan Manufacturing Co Ltd
Current assignee: Suzhou Pan Li Fan Manufacturing Co Ltd
Priority date: 2019-06-13
Filing date: 2019-06-13
Publication date: 2020-03-24
Anticipated expiration: 2029-06-13

Abstract

The utility model relates to a centrifugal fan's import silencing device, including cylindric casing, set up in the fan body of casing inner chamber front end, set up in the hush pipe of casing inner chamber, hush pipe front end and fan body tail end intercommunication, the hush pipe inner chamber is big spherical chamber end to end connection in the middle of a plurality of both ends are little, and the inner wall laminating of hush pipe has the abatvoix, is connected through suspension elastic mechanism between fan body outer wall and hush pipe outer wall and the casing inner wall, and fan body entry covers there is the filter screen. On one hand, the amplitude of the machine body during vibration is reduced through the suspension elastic mechanism on the shell, and the centrifugal fan is protected to work stably for a long time to a certain extent; on the other hand, the arrangement of the silencing pipe and the sound-absorbing plate realizes effective silencing of the fan.

Description

Inlet silencing device of centrifugal fan

Technical Field

The utility model relates to a fan technical field specifically is a centrifugal fan's import silencing device.

Background

The fan is a general mechanical device with large quantity and wide range, and is widely applied to industrial departments such as chemical industry, petroleum, metallurgy, mines, machinery and the like and some civil departments, and the fan generated in operation often becomes a disaster source influencing workers and disturbing the quiet environment, and seriously interferes with the normal work and rest of people, so that the fan becomes public nuisance.

Disclosure of Invention

The utility model aims at providing a centrifugal fan's import silencing device utilizes porous sound absorbing material to come the noise reduction, fixes sound absorbing material and arranges in airflow channel's anechoic chamber, and when the sound wave got into the anechoic chamber, partly sound energy rubbed and converted into heat energy and consumed and dispel in porous material's hole, made the sound wave through the anechoic chamber weaken.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a centrifugal fan's import silencing device, include cylindric casing, set up in the fan body of casing inner chamber front end, set up in casing inner chamber's amortization pipe, amortization pipe front end with fan body tail end intercommunication, the amortization pipe inner chamber is big spherical chamber end to end connection in the middle of a plurality of both ends are little, the inner wall laminating of amortization pipe has the abatvoix, fan body outer wall and amortization pipe outer wall with connect through suspension elastic mechanism between the casing inner wall, the fan body entry covers there is the filter screen.

Utilize suspension mechanism to avoid fan vibration to give the casing to arouse resonance sound production in the above-mentioned design, the hush pipe inner chamber adopts spherical chamber end to end connection's structure to pass out the noise absorption with the fan body backward, and the filter screen can the large solid object of prefilter.

Furthermore, the filter screen is equipped with the abatvoix towards fan body one side, effectively absorbs the noise that the fan body absorbed forward.

Further, the outlet of the fan body is provided with an air outlet uniform distribution plate, and an acoustic board is arranged on one side, facing the fan body, of the air outlet uniform distribution plate. The stable entering amortization pipe of the air current of being convenient for, the amortization of the amortization pipe of being convenient for, the abatvoix is convenient for tentatively absorb the noise of fan body.

Further, suspension elastic mechanism includes the spring, spring one end is supported and is ended casing inner wall, the spring other end is supported and is ended fan body outer wall with the amortization pipe outer wall, the spring winds the amortization pipe axis is made annular array and is distributed, simple structure, and the shock attenuation amortization is obvious, is convenient for the dismouting of amortization pipe and fan body.

Furthermore, the inner wall of the shell is provided with a limiting hole for placing the spring, and the spring is laterally supported.

Further, the muffler pipe exit is equipped with abatvoix and activated carbon filter, effectively filters tiny particle and peculiar smell, further promotes and inhales the sound effect.

Furthermore, soundproof cotton is filled between the silencing pipe and the fan body and the casing, so that noise generated by vibration of the silencing pipe and the fan body is effectively reduced.

The utility model has the advantages that: on one hand, the amplitude of the machine body during vibration is reduced through the suspension elastic mechanism on the shell, and the centrifugal fan is protected to work stably for a long time to a certain extent; on the other hand, the arrangement of the silencing pipe and the sound-absorbing plate realizes effective silencing of the fan.

Drawings

Fig. 1 is an overall sectional view of the present invention.

In the figure, 1, a machine shell, 2, a suspension elastic mechanism, 3, a fan body, 4, a filter screen, 5, soundproof cotton, 6, a limiting hole, 7, a silencing pipe, 8, an activated carbon filter plate, 9, a sound absorption plate and 10, an air outlet uniform distribution plate are arranged.

Detailed Description

The invention will be further explained with reference to the drawings. As shown in fig. 1: the utility model provides a centrifugal fan's import silencing device, including cylindric casing 1, set up in the fan body 3 of 1 inner chamber front end of casing, set up in the hush pipe 7 of 1 inner chamber of casing, hush pipe 7 front end with 3 tail end intercommunications of fan body, hush pipe 7 inner chamber is the little middle big spherical chamber end to end connection in a plurality of both ends, the inner wall laminating of hush pipe 7 has abatvoix 9, 3 outer walls of fan body and hush pipe 7 outer walls with connect through suspension elastic mechanism 2 between the 1 inner wall of casing, 3 entry covers of fan body have filter screen 4.

Utilize suspension mechanism to avoid fan vibration to give casing 1 to arouse resonance sound production in the above-mentioned design, 7 inner chambers of hush pipe adopt spherical chamber end to end connection's structure to pass out the noise absorption with fan body 3 backward, and filter screen 4 can the large solid object of prefilter.

Furthermore, the filter screen 4 is provided with a sound-absorbing board 9 towards one side of the fan body 3, so that the forward absorbed noise of the fan body 3 is effectively absorbed.

Further, 3 exports of fan body are equipped with the air-out equipartition board, the air-out equipartition board is equipped with abatvoix 9 towards 3 one sides of fan body. The stable entering of the air current of being convenient for noise reduction pipe 7, the noise reduction of the noise reduction pipe 7 of being convenient for, abatvoix 9 is convenient for tentatively absorb the noise of fan body 3.

Further, suspension elastic mechanism 2 includes the spring, spring one end is supported and is ended 1 inner wall of casing, the spring other end is supported and is ended 3 outer walls of fan body with hush pipe 7 outer walls, the spring winds 7 axes of hush pipe do annular array and distribute, simple structure, and the shock attenuation amortization is obvious, is convenient for hush pipe 7 and fan body 3's dismouting.

Furthermore, the inner wall of the machine shell 1 is provided with a limiting hole 6 for placing the spring, and the spring is laterally supported.

Further, 7 exits of hush pipe are equipped with abatvoix 9 and activated carbon filter 8, effectively filter particulate matter and peculiar smell, further promote the sound effect of inhaling.

Furthermore, soundproof cotton 5 is filled between the silencing pipe 7 and the fan body 3 and the casing, so that noise generated by vibration of the silencing pipe 7 and the fan body 3 is effectively reduced.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a centrifugal fan's import silencing device, its characterized in that, including cylindric casing, set up in the fan body of casing inner chamber front end, set up in casing inner chamber's amortization pipe, amortization pipe front end with fan body tail end intercommunication, the amortization pipe inner chamber is big spherical chamber end to end connection in the middle of a plurality of both ends are little, the inner wall laminating of amortization pipe has the abatvoix, fan body outer wall and amortization pipe outer wall with connect through suspension elastic mechanism between the casing inner wall, the fan body entry covers there is the filter screen.

2. The silencer assembly of claim 1, wherein the filter screen is provided with an acoustic panel on a side facing the fan body.

3. The inlet silencer of the centrifugal fan according to claim 1, wherein the outlet of the fan body is provided with an air outlet uniform distribution plate, and one side of the air outlet uniform distribution plate, which faces the fan body, is provided with an acoustic board.

4. The silencer assembly of claim 1, wherein the suspension spring mechanism includes springs, one end of each spring abuts against the inner wall of the casing, the other end of each spring abuts against the outer wall of the fan body and the outer wall of the silencer pipe, and the springs are distributed in an annular array around the axis of the silencer pipe.

5. The silencer assembly of claim 4, wherein the inner wall of the casing has a hole for receiving the spring to laterally support the spring.

6. The inlet silencer for a centrifugal fan according to claim 1, wherein an acoustic panel and an activated carbon filter panel are provided at an outlet of the silencer duct.

7. The inlet silencer assembly of claim 1, wherein sound insulation cotton is filled between the silencer duct and the blower body and the casing.