CN213064086U

CN213064086U - Efficient energy-saving silencer for fan inlet

Info

Publication number: CN213064086U
Application number: CN202021070372.9U
Authority: CN
Inventors: 陈登; 陈虎; 林群
Original assignee: Yingcheng Shindoo Chemical Co ltd
Current assignee: Yingcheng Shindoo Chemical Co ltd
Priority date: 2020-06-11
Filing date: 2020-06-11
Publication date: 2021-04-27
Anticipated expiration: 2030-06-11

Abstract

The utility model discloses a fan import is with energy-efficient silencing device, including gaseous honeycomb duct and noise elimination elbow, noise elimination elbow fixed connection is on the fan air intake, the tip intercommunication of noise elimination elbow has the amortization cavity, the cross-sectional area of noise elimination elbow is followed fan mouth to amortization cavity grow in proper order, gaseous honeycomb duct connection is at amortization cavity tip. The utility model discloses a flow distribution plate, air diffuser and static pressure case that set up in the amortization cavity fall the noise to the interior gas of fan, and what the layering was seted up on the flow distribution plate reduces the noise that the through-hole that becomes dense in proper order can absorb most well low frequency, and the noise elimination elbow that the cross-sectional area constantly reduces satisfies the fluidic structure of the biggest noise elimination effect simultaneously.

Description

Efficient energy-saving silencer for fan inlet

Technical Field

The utility model relates to an automation equipment field, concretely relates to fan import is with energy-efficient silencing device.

Background

From a physiological point of view, all sounds that disturb people's rest, study and work and interfere with the sound you hear, i.e. unwanted sounds, are collectively referred to as noise. The noise is generated for a plurality of reasons, and the noise pollution can be divided into the following parts according to the mechanical characteristics of a sound source: noise from gas turbulence, noise from solid vibration, noise from liquid impact, and electromagnetic noise from electromagnetic action. When air flows through a duct or a metal surface at a high speed, noise is generated when the air generally contacts with a turbulent flow or a large and rapid pressure change in the duct, such as turbulent flow, jet flow, cavitation, vortex and the like.

Use air-blower in a large number in the chemical industry enterprise's production, and the fan import produces very big noise because of gaseous fast flow, produces very big damage to operating personnel hearing system, consequently sets up the muffler in the fan import. Be provided with baffling board and amortization cotton in the present muffler commonly used, its resistance is great, and the power consumption that produces is great, and the effect is not good, and the price is higher, causes to cause great cost burden for chemical enterprises when using in a large number.

Disclosure of Invention

The utility model provides a not enough to prior art, the utility model provides a special energy-efficient silencing device of fan import does not adopt baffling board and amortization cotton commonly used, and can effectively reduce noise pollution, reduces use cost simultaneously.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:

a special high-efficiency energy-saving silencing device for a fan inlet comprises a gas flow guide pipe and a silencing elbow, wherein the silencing elbow is fixedly connected to an air inlet of a fan, the end part of the silencing elbow is communicated with a silencing chamber, the cross section area of the silencing elbow is sequentially increased from a fan opening to the silencing chamber, and the gas flow guide pipe is connected to the end part of the silencing chamber;

a flow distribution plate, a diffuser and a static pressure box are arranged in the silencing cavity, the flow distribution plate is fixedly installed in the silencing cavity through a fixing frame, and the static pressure box is fixedly installed on the inner wall of the diffuser.

Preferably, the gas guide pipe is in a round table shape, the included angle between a bus and the central axis is 8-12 degrees, and the small end of the gas guide pipe is connected to the end face of the air inlet of the silencer.

Preferably, the cross-sectional area of the small end of the gas guide pipe is at least 6 times of that of the fan opening.

Preferably, the flow distribution plate comprises a first microporous plate and a second microporous plate, the first microporous plate is arranged on one side close to the silencing elbow in the silencing cavity, the second microporous plate is arranged on one side close to the gas flow guide pipe in the silencing cavity, sound absorption holes are uniformly distributed on the surfaces of the first microporous plate and the second microporous plate, the diameter of the first sound absorption hole on the first microporous plate is smaller than that of the second sound absorption hole on the second microporous plate, and the number of the first sound absorption holes on the first microporous plate is greater than that of the second sound absorption holes on the second microporous plate.

Preferably, the silencing elbow is of an external angle and an internal circle structure.

Preferably, the silencing chambers are fixed between the silencing elbow and the gas guide pipe in series.

The utility model provides a special energy-efficient silencing device of fan import possesses following beneficial effect: the utility model discloses a flow distribution plate, air diffuser and static pressure case that set up in the amortization cavity fall the noise to the interior gas of fan, and what the layering was seted up on the flow distribution plate reduces the noise that the through-hole that becomes dense in proper order can absorb most well low frequency, and the noise elimination elbow that the cross-sectional area constantly reduces satisfies the fluidic structure of the biggest noise elimination effect simultaneously.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of a first microporous plate according to the present invention;

in the figure: 1. a gas flow guide pipe; 2. a silencing elbow; 3. a sound deadening chamber; 4. a flow distribution plate; 5. a diffuser; 6. a static pressure box; 7. a first microporous plate; 8. a second microporous plate; 9. a first sound-absorbing aperture; 10. and a second sound-absorbing aperture.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention will be combined to clearly and completely describe the technical solutions in the embodiments of the present invention.

In the first embodiment, as shown in fig. 1 to 2, a special efficient energy-saving silencer for a fan inlet includes a gas flow guiding pipe 1 and a silencing elbow 2, the silencing elbow 2 is fixedly connected to an air inlet of a fan, an end of the silencing elbow 2 is communicated with a silencing chamber 3, a cross-sectional area of the silencing elbow 2 is sequentially increased from a fan opening to the silencing chamber 3, and the gas flow guiding pipe 1 is connected to an end of the silencing chamber 3;

be provided with flow distribution plate 4, air diffuser 5 and static pressure case 6 in the amortization cavity 3, flow distribution plate 4 passes through mount fixed mounting in amortization cavity 3, and static pressure case 6 fixed mounting is in 5 inner walls of air diffuser. The diffuser 5 is integrated with the plenum box 6 to organize the air flow to be evenly distributed.

The working principle is as follows: the device is fixedly arranged on the mouth of the fan through the silencing elbow 2, gas discharged by the fan firstly passes through the silencing elbow 2, the cross section area of the silencing elbow 2 is gradually increased, the flow rate of the gas can be gradually reduced, and the frequency of noise is reduced. Noise arrives amortization cavity 3, and under the effect of static pressure case 6 and diffuser 5, the air current can distribute evenly, and the noise attenuates greatly, and the air current produces violent friction between 4 after arriving flow distribution plate 4 and flow distribution plate to greatly reduced sound energy, the gas that flow distribution plate 4 flows out releases through gas honeycomb duct 1, and this device does not adopt conventional baffling board and amortization cotton, and has effectively reduced the resistance, reduces fan power consumption.

In the actual use, do not install the utility model discloses an between the device, the noise can reach more than 160 decibels, uses the back noise to control within 80 decibels.

In a second embodiment, the gas guide pipe 1 is in a circular truncated cone shape, an included angle between a generatrix of the gas guide pipe 1 and the central axis is 8 ° to 12 °, a small end of the gas guide pipe 1 is connected to an end face of an air inlet of the muffler, the gas guide pipe 1 is in an open horn shape, and the friction noise of the gas to the device is reduced due to the streamline design.

In a third embodiment, the cross-sectional area of the small end of the gas guide pipe 1 is at least 6 times of the cross-sectional area of the fan opening, so that the noise is minimum when the flow velocity of the gas is 3 m/s to 5 m/s.

In the fourth embodiment, as a preferred technical solution of the first embodiment, the flow distribution plate 4 includes a first microporous plate 7 and a second microporous plate 8, the first microporous plate 7 is disposed at a side of the silencing cavity close to the silencing elbow, the second microporous plate 8 is disposed at a side of the silencing cavity close to the gas flow guide pipe, sound absorption holes are uniformly distributed on the surfaces of the first microporous plate 7 and the second microporous plate 8, the diameter of the first sound absorption hole 9 on the first microporous plate 7 is smaller than the diameter of the second sound absorption hole 10 on the second microporous plate 8, the number of the first sound absorption holes 9 on the first microporous plate 7 is greater than the number of the second sound absorption holes 10 on the second microporous plate 8, and an air column at the neck of the sound absorption hole of each microporous plate and the air in the cavity form a clamping plate sound absorption mechanism, when the external noise frequency is the same as the natural frequency of the elastic system, the air at the aperture is caused to resonate strongly, and intense friction is generated, thereby consuming sound energy.

In the fifth embodiment, as an optimal technical scheme of the first embodiment, the noise elimination elbow 2 has an outer angle and an inner circle structure, which is beneficial to improving the noise elimination effect, reducing the resistance loss and reducing the regeneration noise.

Sixth embodiment, this embodiment is a preferred technical solution of the first embodiment, a plurality of muffling chambers 3 are fixed in series between the muffling elbow 2 and the gas guiding pipe 1, and in order to enhance the muffling effect, a plurality of muffling chambers 3 can be used in series, for example, after two muffling chambers 3 are connected in series, the wind speed is 3 meters per second to 5 meters per second, and the decibel of the noise is reduced to 60 to 80, so that the wind speed is not significantly reduced, and the noise can be greatly reduced.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; the pattern filling in the drawings of the utility model does not represent the material of the structure, and only distinguishes the structure; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A high-efficiency energy-saving silencing device for a fan inlet comprises a gas flow guide pipe and a silencing elbow, and is characterized in that the silencing elbow is fixedly connected to an air inlet of a fan, the end part of the silencing elbow is communicated with a silencing chamber, the cross section area of the silencing elbow is sequentially increased from a fan opening to the silencing chamber, and the gas flow guide pipe is connected to the end part of the silencing chamber;

2. The efficient energy-saving silencer for the fan inlet according to claim 1, wherein the gas guide pipe is in a circular truncated cone shape, an included angle between a generatrix of the gas guide pipe and a central axis of the gas guide pipe is 8-12 degrees, and a small end of the gas guide pipe is connected to an end face of an air inlet of the silencer.

3. The efficient energy-saving silencer for the fan inlet according to claim 2, wherein the cross-sectional area of the small end of the gas guide pipe is at least 6 times the cross-sectional area of the fan opening.

4. The efficient energy-saving silencer for the fan inlet according to claim 1, wherein the splitter plate comprises a first microporous plate and a second microporous plate, the first microporous plate is disposed on a side of the silencing cavity close to the silencing elbow, the second microporous plate is disposed on a side of the silencing cavity close to the gas flow guide pipe, sound absorption holes are uniformly distributed on the surfaces of the first microporous plate and the second microporous plate, the diameter of the first sound absorption hole on the first microporous plate is smaller than that of the second sound absorption hole on the second microporous plate, and the number of the first sound absorption holes on the first microporous plate is greater than that of the second sound absorption holes on the second microporous plate.

5. The efficient energy-saving silencer for the fan inlet according to claim 1, wherein a plurality of the silencing chambers are fixed in series between the silencing elbow and the gas guide pipe.