CN212563849U - Radial annular multi-channel air inlet and outlet silencer - Google Patents
Radial annular multi-channel air inlet and outlet silencer Download PDFInfo
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- CN212563849U CN212563849U CN202021469903.1U CN202021469903U CN212563849U CN 212563849 U CN212563849 U CN 212563849U CN 202021469903 U CN202021469903 U CN 202021469903U CN 212563849 U CN212563849 U CN 212563849U
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Abstract
The utility model discloses a radial annular multichannel business turn over wind noise eliminator, including guiding disk, outer noise elimination awl section of thick bamboo and interior noise elimination awl section of thick bamboo, the guiding disk is connected to interior noise elimination awl section of thick bamboo one end, and the other end suit is in outer noise elimination awl section of thick bamboo, and the guiding disk, outer noise elimination awl section of thick bamboo, interior noise elimination awl section of thick bamboo enclose into an area jointly and be the convergent formula, the air current passageway that the geometric shape was from radial annular rounding off to axial annular, and annular air current passageway circumferencial direction is equipped with a plurality of noise elimination pieces, and the noise elimination piece divides annular passageway into a plurality of little passageways; an annular air inlet is formed between the outer silencing cone and the flow guide disc, and an annular air outlet is formed between the outer silencing cone and the inner silencing cone. The utility model discloses enclose into an area and be the gradual shrinkage formula, geometric shape from radial annular rounding off to axial annular airflow channel, airflow channel circumferencial direction is equipped with a plurality of noise elimination pieces, falls into a plurality of subchannels with annular channel, under the prerequisite that does not increase air speed, is showing and has increased noise elimination area, reaches the purpose of realizing the ultra-low noise.
Description
Technical Field
The utility model relates to a radial annular multichannel business turn over wind noise eliminator.
Background
At present, mine axial flow fans produced and used in China mainly comprise FBCD, FBDY and other series, motors of the fans are two-level explosion-proof motors, the motor rotating speed is high, and the pneumatic noise is large; in order to reduce noise, the inlet and the outlet of the fan are provided with silencers. Various mine fan manufacturers design silencers with different structural forms, so that the noise of the fan is further reduced. Patent CN108194395A discloses an elbow air inlet muffler device, which reduces the noise by passing through the elbow and straight partition wall and then passing out the elbow, but because of the multiple turns of the air inlet duct, the inlet resistance is increased, and the efficiency of the fan is reduced. In order to improve the above situation, the inventor of patent CN 209908854U discloses a sound-deadening structure of an oblique air inlet structure, so that the air inlet resistance is reduced. However, the air inlet is still a side channel, the speed of the air inlet is limited, and meanwhile, the silencing area of the silencing guide plate on the air inlet channel is increased, so that certain limitation still exists.
In recent years, most mine users have higher requirements on the noise of the fan under the mine, and the noise is lower than 80 decibels. In order to meet the user's demands, it is necessary to develop a muffler of a new structure.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a radial annular multichannel business turn over wind noise eliminator simple structure, noise elimination effect are good.
The utility model provides a technical scheme of above-mentioned problem is: a radial annular multi-channel air inlet and outlet silencing device comprises a flow guide disc, an outer silencing cone and an inner silencing cone, wherein one end of the inner silencing cone is connected with the flow guide disc, the other end of the inner silencing cone is supported by flat steel and sleeved in the outer silencing cone, the flow guide disc, the outer silencing cone and the inner silencing cone jointly enclose an airflow channel with a gradually-reduced area and a geometric shape which is smoothly transited from a radial annular shape to an axial annular shape, a plurality of silencing sheets which are radial and parallel to the direction of an inlet airflow are uniformly arranged in the circumferential direction of the annular airflow channel, and the annular channel is divided into a plurality of small channels by the silencing sheets; an annular air inlet is formed between the outer silencing cone and the flow guide disc, and an annular air outlet is formed between the outer silencing cone and the inner silencing cone.
In the radial annular multi-channel air inlet and outlet silencer, the flow guide disc is formed by enclosing a front sealing plate, a straight cylinder body positioned at the rear part of the front sealing plate and a front flow guide plate positioned at the rear part of the straight cylinder body; the outer silencing cone is formed by enclosing a rear guide plate, an outer silencing cone body positioned at the rear part of the rear guide plate and a shell body positioned outside the outer silencing cone body; the inner silencing cone cylinder is formed by enclosing an inner silencing cone cylinder body and a rear sealing plate positioned at the rear part of the inner silencing cone cylinder body; and silencing materials are filled in the inner cavity of the diversion disc, the inner cavity of the outer silencing cone and the inner cavity of the inner silencing cone.
In the radial annular multi-channel air inlet and outlet silencer, the radially arranged silencer fins are plate-shaped or wedge-shaped cavities surrounded by the pore plates, and silencing materials are filled in the cavities.
In the radial annular multi-channel air inlet and outlet silencer, the joints of the silencing pieces with the front guide plate and the rear guide plate are respectively arc-shaped surfaces which are smoothly contacted with the curved surfaces of the front guide plate and the rear guide plate.
According to the radial annular multi-channel air inlet and outlet silencing device, the silencing sheet faces the air inlet direction and the air outlet direction, and the enclosing surface is arc-shaped or conical with a chamfer.
The radial annular multi-channel air inlet and outlet silencer has the advantages that the cross section sizes or the outline shapes of all the silencer pieces are completely the same, and the depth of the silencer pieces inserted into the channel does not exceed the position of the throat pipe where the channel turns.
According to the radial annular multi-channel air inlet and outlet silencer, the front guide plate and the rear guide plate are of circular arc disc structures, the rear end of the front guide plate is in smooth transition connection with the inner silencing cone cylinder, and the rear end of the rear guide plate is in smooth transition connection with the outer silencing cone cylinder.
According to the radial annular multi-channel air inlet and outlet silencer, the front guide plate, the rear guide plate, the outer silencing cone cylinder body and the inner silencing cone cylinder body are made of punching plates, and the hole diameters of the punching plates are 3-5 mm.
According to the radial annular multi-channel air inlet and outlet silencer, the air inlet end of the air flow channel is fixedly connected with the outer silencing conical cylinder and the flow guide disc in the circumferential direction through the round steels, the air outlet end of the air flow channel is fixedly connected with the outer silencing conical cylinder and the inner silencing conical cylinder in the circumferential direction through the flat steels, and the connecting ends of the outer silencing conical cylinder and the inner silencing conical cylinder are fixedly connected to the flange.
According to the radial annular multi-channel air inlet and outlet silencer, the grid type protective net is arranged at the annular air inlet of the airflow channel.
The beneficial effects of the utility model reside in that:
1. the utility model discloses a flow guide plate, outer noise elimination awl section of thick bamboo, interior noise elimination awl section of thick bamboo encloses into an area jointly and is the convergent formula, the air current passageway of axial annular is followed in radial annular rounding off to geometric shape, annular air current passageway circumferencial direction evenly arranges that a plurality of is the width of cloth and with the noise elimination piece that business turn over wind direction is parallel, a plurality of noise elimination pieces divide into a plurality of subchannels with annular passageway, a plurality of passageway air inlets can guarantee that the import wind speed is no longer than the limit value to reduce the air current resistance of air inlet, guarantee fan efficiency.
2. The utility model discloses be equipped with a plurality of in annular gas flow channel circumferencial direction and be radial and evenly arrange the noise elimination piece, separate into a plurality of subchannels with annular gas flow channel after, the passageway can form a plurality of resonant cavities on the one hand, plays the attenuation to the noise. Meanwhile, the silencing sheet is a silencing body enclosed by the punching plate, the silencing area contacted with the airflow is obviously increased, and the silencing sheet has a good sound absorption effect. Thus, the purpose of noise reduction is achieved.
Drawings
Fig. 1 is a schematic view of a front structural section of the present invention.
Fig. 2 is a schematic cross-sectional view at B-B of fig. 1.
Fig. 3 is a schematic view of the structure in the direction a of fig. 1.
Fig. 4 is a schematic view of the external structure of fig. 1.
Fig. 5 is a schematic view of the outline shape of the silencing sheet in fig. 1.
Fig. 6 is a schematic sectional view of a-a in fig. 5.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
As shown in fig. 1, a radial annular multi-channel air inlet and outlet silencer comprises a flow guide disc, an outer silencing cone and an inner silencing cone, wherein one end of the inner silencing cone is connected with the flow guide disc, the other end of the inner silencing cone is supported by flat steel and sleeved in the outer silencing cone, the flow guide disc, the outer silencing cone and the inner silencing cone jointly enclose an airflow channel 13 with a gradually reduced area and a geometric shape which is smoothly transited from the radial annular shape to the axial annular shape, a plurality of silencing sheets 14 which are radially and uniformly arranged are arranged in the circumferential direction of the annular airflow channel, and the annular channel is divided into a plurality of small channels by the silencing sheets 14; an annular air inlet is formed between the outer silencing cone and the flow guide disc, and an annular air outlet is formed between the outer silencing cone and the inner silencing cone.
The flow guide disc is formed by enclosing a front seal plate 1, a straight cylinder body 2 positioned at the rear part of the front seal plate 1 and a front flow guide plate 3 positioned at the rear part of the straight cylinder body 2; the outer silencing cone is formed by enclosing a rear guide plate 5, an outer silencing cone body 6 positioned at the rear part of the rear guide plate 5 and a shell body 8 positioned outside the outer silencing cone body 6; the inner silencing cone cylinder is formed by enclosing an inner silencing cone cylinder body 7 and a rear sealing plate 11 positioned at the rear part of the inner silencing cone cylinder body 7; and silencing materials are filled in the inner cavity of the diversion disc, the inner cavity of the outer silencing cone and the inner cavity of the inner silencing cone.
As shown in fig. 2, a plurality of muffling sheets 14 are arranged in the circumferential direction of the annular flow channel to increase the muffling area. The increase range of the silencing area depends on the depth of the silencing sheet 14 inserted into the flow passage and the number of the silencing sheets 14 arranged. Thus, the insertion depth of the silencing sheet 14 does not exceed the throat where the channel turns. The number of the silencing sheets 14 is not more than 8 according to the silencers with different specifications.
As shown in fig. 5 and 6, the radially arranged silencing sheets 14 are plate-shaped or wedge-shaped cavities surrounded by orifice plates, and the cavities are filled with silencing materials. The joints of the silencing sheet 14 and the front guide plate 3 and the rear guide plate 5 are arc surfaces which are smoothly contacted with the curved surfaces of the front guide plate 3 and the rear guide plate 5 respectively. The enclosure surface of the silencing piece 14 faces the air inlet direction and the air outlet direction and is in a circular arc shape or a conical shape with a chamfer angle. The cross-sectional dimensions or the outer shapes of the noise-reduction sheets 14 are identical. Two outline edges of the silencing sheet 14 in the thickness direction are curved surfaces with the radius of R and R and matched with the front guide plate 3 and the rear guide plate 5 respectively.
The front guide plate 3 and the rear guide plate 5 are of arc disc structures, the rear end of the front guide plate 3 is in smooth transition connection with the inner silencing cone body 7, and the rear end of the rear guide plate 5 is in smooth transition connection with the outer silencing cone body 6.
The front guide plate 3, the rear guide plate 5, the outer silencing cone cylinder 6 and the inner silencing cone cylinder 7 are made of punching plates, and the hole diameters of the punching plates are 3-5 mm.
As shown in fig. 3, the air inlet end of the air flow channel 13 fixedly connects the outer noise elimination cone and the diversion disk in the circumferential direction through a plurality of round steels 4, the air outlet end of the air flow channel 13 fixedly connects the outer noise elimination cone and the inner noise elimination cone in the circumferential direction through a plurality of flat steels 10, and the connecting ends of the outer noise elimination cone and the inner noise elimination cone are fixedly connected to the flange 9, are connected with the flange 9 into a whole, and are conveniently connected with the fan main unit.
As shown in fig. 4, at the annular air inlet of the airflow channel 13, a grid-type protective screen 12 is used to surround the annular air inlet, so as to prevent foreign matters such as large particles from entering the airflow channel 13. In order to enhance the strength of the protective net 12, the outer silencing cone is fixedly connected with the flow guiding disc by round steel 4 at the position close to the air inlet.
The utility model discloses increase a plurality of radial silencing pieces 14 of arranging in annular airflow channel 13, separate annular airflow channel 13 into a plurality of subchannels. The small channels are tightly connected one by one to form an unclosed resonant cavity, and the noise is also attenuated. Meanwhile, the small channels are divided, on the premise of ensuring the air inlet speed and the air inlet amount, the noise elimination area is remarkably increased by combining the mechanisms of noise elimination, sound absorption, sound insulation and the like, so that the noise is further absorbed in the contact of the noise elimination sheet 14, and the purpose of noise reduction is achieved. The specific process is as follows: after entering the flow channel from the radial direction (i.e. the air inlet) of the annular air flow channel 13, the air flow enters the axial direction of the annular air flow channel 13 through the guide of the front guide plate 3 and the rear guide plate 5, the air flow speed is continuously increased along with the continuous reduction of the channel section, and the maximum value of the air flow speed is at the connection part with the main machine channel. This is also the place where the resistance to air flow is the greatest in the air flow channel 13, and everywhere else has less resistance to air flow than there. Therefore, even if the silencing sheet 14 is added to the airflow path 13, the area of contact between the airflow and the silencing sheet 14 is much larger, but the airflow velocity is relatively small and the increased frictional resistance does not have a large influence on the aerodynamic performance. The noise of the fan comes out through the airflow channel 13, is not transmitted linearly along the axial direction any more, but is absorbed and attenuated under the blocking of the outer noise elimination cone body 6 and the flow guide disc, and then is reflected/refracted out. When the light is refracted or reflected, the light is contacted with the silencing sheets 14 on the airflow channels 13 and is absorbed and attenuated continuously. Thus, the noise of the whole axial flow fan is reduced.
It should be noted that the front and back in the above description are according to the directions shown in the drawings. The silencer of the air inlet and outlet silencing device can be arranged at the air inlet of the fan to be used as an inlet for silencing, and can also be arranged at the outlet of the fan to be used as an outlet for silencing.
Claims (10)
1. The utility model provides a radial annular multichannel business turn over wind noise eliminator which characterized in that: the silencer comprises a flow guide disc, an outer silencing cone and an inner silencing cone, wherein one end of the inner silencing cone is connected with the flow guide disc, the other end of the inner silencing cone is supported by flat steel and sleeved in the outer silencing cone, the flow guide disc, the outer silencing cone and the inner silencing cone jointly enclose an airflow channel with a gradually-reduced area and a geometric shape which is smoothly transited from a radial annular shape to an axial annular shape, a plurality of silencing pieces which are radial and parallel to the direction of an inlet airflow are uniformly distributed in the circumferential direction of the annular airflow channel, and the annular channel is divided into a plurality of small channels by the plurality of silencing pieces; an annular air inlet is formed between the outer silencing cone and the flow guide disc, and an annular air outlet is formed between the outer silencing cone and the inner silencing cone.
2. The radial annular multichannel air inlet and outlet silencer device of claim 1, wherein: the flow guide disc is formed by enclosing a front sealing plate, a straight cylinder body positioned at the rear part of the front sealing plate and a front flow guide plate positioned at the rear part of the straight cylinder body; the outer silencing cone is formed by enclosing a rear guide plate, an outer silencing cone body positioned at the rear part of the rear guide plate and a shell body positioned outside the outer silencing cone body; the inner silencing cone cylinder is formed by enclosing an inner silencing cone cylinder body and a rear sealing plate positioned at the rear part of the inner silencing cone cylinder body; and silencing materials are filled in the inner cavity of the diversion disc, the inner cavity of the outer silencing cone and the inner cavity of the inner silencing cone.
3. The radial annular multichannel air inlet and outlet silencer device of claim 2, wherein: the radially arranged silencing pieces are plate-shaped or wedge-shaped cavities surrounded by pore plates, and silencing materials are filled in the cavities.
4. The radial annular multichannel air inlet and outlet silencer device of claim 2, wherein: the joints of the silencing pieces and the front guide plate and the rear guide plate are arc surfaces which are smoothly contacted with the curved surfaces of the front guide plate and the rear guide plate respectively.
5. The radial annular multichannel air inlet and outlet silencer device of claim 2, wherein: the enclosure surface of the silencing piece faces the air inlet direction and the air outlet direction and is arc-shaped or conical with a chamfer angle.
6. The radial annular multichannel air inlet and outlet silencer device of claim 2, wherein: the section size or the outline shape of each silencing sheet is completely the same, and the depth of the silencing sheet inserted into the channel does not exceed the throat part of the channel turning.
7. The radial annular multichannel air inlet and outlet silencer device of claim 2, wherein: the front guide plate and the rear guide plate are of arc disc structures, the rear end of the front guide plate is in smooth transition connection with the inner silencing cone cylinder, and the rear end of the rear guide plate is in smooth transition connection with the outer silencing cone cylinder.
8. The radial annular multichannel air inlet and outlet silencer device of claim 2, wherein: the front guide plate, the rear guide plate, the outer silencing cone cylinder body and the inner silencing cone cylinder body are made of punching plates, and the hole diameters of the punching plates are 3-5 mm.
9. The radial annular multichannel air inlet and outlet silencer device of claim 2, wherein: the air inlet end of the air flow channel is fixedly connected with the outer silencing cone and the flow guide disc in the circumferential direction through a plurality of round steels, the air outlet end of the air flow channel is fixedly connected with the outer silencing cone and the inner silencing cone in the circumferential direction through a plurality of flat steels, and the connecting end of the outer silencing cone and the connecting end of the inner silencing cone are fixedly connected to the flange.
10. The radial annular multichannel air inlet and outlet silencer device of claim 2, wherein: and a grid type protective net is arranged at the annular air inlet of the airflow channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021469903.1U CN212563849U (en) | 2020-07-23 | 2020-07-23 | Radial annular multi-channel air inlet and outlet silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021469903.1U CN212563849U (en) | 2020-07-23 | 2020-07-23 | Radial annular multi-channel air inlet and outlet silencer |
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| Publication Number | Publication Date |
|---|---|
| CN212563849U true CN212563849U (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021469903.1U Active CN212563849U (en) | 2020-07-23 | 2020-07-23 | Radial annular multi-channel air inlet and outlet silencer |
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| Country | Link |
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| CN (1) | CN212563849U (en) |
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- 2020-07-23 CN CN202021469903.1U patent/CN212563849U/en active Active
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