CN212318386U - Centrifugal fan with vibration/noise reduction device - Google Patents
Centrifugal fan with vibration/noise reduction device Download PDFInfo
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- CN212318386U CN212318386U CN202020393046.5U CN202020393046U CN212318386U CN 212318386 U CN212318386 U CN 212318386U CN 202020393046 U CN202020393046 U CN 202020393046U CN 212318386 U CN212318386 U CN 212318386U
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Abstract
本实用新型涉及一种具有减震降噪装置的离心型风机，包括风机本体、底座以及电机，风机本体与电机可拆卸固定在底座上，风机本体与电机可拆卸固定连接，底座的底面设置有减振机构，电机的外侧设置有消音罩，消音罩包括固定连接在底座上的框架以及可拆卸固定在框架内的多个消音板。风机本体的内部设置有等距离分布的扇叶，风机本体的输出端固定有出风管，出风管的一侧内壁设置有消音器。当离心型风机工作时，电机转动产生的噪音在消音罩内扩散很难向外传播，在一定程度上降低了噪音的传递。离心风机在工作时产生的振动在减震机构的作用下，降低了振动频率，从根本上降低了噪音的产生。
The utility model relates to a centrifugal fan with a shock absorption and noise reduction device, comprising a fan body, a base and a motor. The fan body and the motor are detachably fixed on the base, the fan body and the motor are detachably and fixedly connected, and the bottom surface of the base is provided with a In the vibration damping mechanism, a sound-absorbing cover is arranged on the outside of the motor, and the sound-absorbing cover includes a frame fixedly connected to the base and a plurality of sound-absorbing plates detachably fixed in the frame. The inside of the fan body is provided with fan blades distributed at equal distances, the output end of the fan body is fixed with an air outlet pipe, and one inner wall of the air outlet pipe is provided with a muffler. When the centrifugal fan is working, the noise generated by the rotation of the motor diffuses in the muffler cover and is difficult to spread outward, which reduces the transmission of noise to a certain extent. The vibration generated by the centrifugal fan during operation reduces the vibration frequency under the action of the shock absorbing mechanism and fundamentally reduces the noise.
Description
Technical Field
The utility model belongs to the technical field of the fan manufacturing technology and specifically relates to a centrifugal fan with vibration/noise reduction device is related to.
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. Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and draught of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selecting grains; wind tunnel wind source and air cushion boat inflation and propulsion.
In the prior art, as disclosed in chinese patent No. CN209041150U, it discloses a centrifugal fan with dustproof function, including centrifugal fan, two perpendicular grooves have been seted up to centrifugal fan's inner wall bilateral symmetry, centrifugal fan's inner wall bottom and upper end symmetry are equipped with two folding baffles that match with the air intake, folding baffle's outer wall bilateral symmetry is equipped with two and erects the absorption piece that the groove matches, the square groove has been seted up in the front of absorption piece, be connected with the gag lever post through the pivot on the inner wall of square groove, centrifugal fan's front bilateral symmetry has seted up two elongated slots that match with the gag lever post, the inner wall upper end and the lower extreme symmetric connection that erect the groove have two springs, spring and absorption piece fixed connection.
The above prior art solutions have the following drawbacks: although the above utility model can prevent dust and impurities from entering the centrifugal fan when not in use, when it is in operation, the noise generated by the fan in operation often becomes a source of accidents affecting the health of workers and disturbing the quiet environment, and seriously interferes with the normal work and rest of people, so as to become public nuisance. The fan generates noise mainly due to two aspects, namely, firstly, the vibration generated by the rotation of a motor driving the fan to rotate, and secondly, the rotation of blades of the fan can cause friction or collision with air under the conditions of high speed and low load, and the higher the speed is, the higher the air frequency is, and the sharper the noise is. Therefore, a centrifugal fan capable of reducing noise is desired.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a through acoustical panel noise absorption's centrifugal type fan to the not enough of prior art existence.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
a centrifugal fan with a damping and noise reducing device comprises a fan body, a base and a motor, wherein the fan body and the motor are detachably fixed on the base;
the fan comprises a fan body and is characterized in that fan blades distributed equidistantly are arranged inside the fan body, an air outlet pipe is fixed at the output end of the fan body, and a silencer is arranged on the inner wall of one side of the air outlet pipe.
Through above-mentioned technical scheme, when centrifugal type fan during operation, the noise that the motor rotation produced is difficult outwards to propagate in the amortization cover internal diffusion, has reduced the transmission of noise to a certain extent. Meanwhile, when the noise is conducted on the silencing plate, the energy of the noise is reduced, and the noise is further reduced. The vibration generated by the centrifugal fan during working reduces the vibration frequency under the action of the damping mechanism, so that the noise is fundamentally reduced, the noise generated by the fan during rotation can be effectively reduced by the silencer, and the noise reduction effect is further improved.
The present invention may be further configured in a preferred embodiment as: the frame comprises support rods which are sequentially and mutually perpendicular and fixedly connected, and limit grooves for sliding and embedding the silencing plates are formed in the support rods.
Through the technical scheme, before the centrifugal fan works, the plurality of silencing plates are inserted and fixed in the limiting groove, so that the outer side of the motor forms a sealed silencing cover, and the noise transmission of the motor during working is effectively reduced. When needing to maintain or change the motor, directly take out the abatvoix from the spacing inslot, be convenient for dismantle the motor from the base, simple structure, convenient to use has played fine noise reduction effect.
The present invention may be further configured in a preferred embodiment as: the sound-absorbing plate comprises two elastic layers, a foaming layer and a waterproof layer, wherein the foaming layer is arranged between the two elastic layers, and the waterproof layer is fixed on one surface, far away from the foaming layer, of the elastic layer.
Through above-mentioned technical scheme, the elastic layer can absorb the vibration energy that produces when coming from the motor rotation, reduces the transmission of vibration. The sound wave of the noise enters the foaming layer after passing through the elastic layer, a large number of hole structures in the foaming layer are rubbed, and partial sound energy is converted into heat energy to be dissipated, so that the intensity of the noise is further reduced. The waterproof layer can avoid external moisture from entering the interior of the motor to shorten the service life of the motor, effectively protects the elastic layer and the foaming layer and prolongs the service life of the silencing plate.
The present invention may be further configured in a preferred embodiment as: and a sound absorption layer is fixed between the foaming layer and the elastic layer, and the sound absorption coefficient of the sound absorption layer is greater than that of the foaming layer.
Through the technical scheme, the sound absorption layer has the capacity of attenuating the intensity of sound waves or reflecting the sound waves, the sound waves reach the first sound absorption layer after passing through the elastic layer, the sound waves are conducted in the foaming layer after being reduced, the residual sound wave energy which is not completely absorbed by the foaming layer is conducted in the second sound absorption layer, and the noise is basically difficult to propagate out of the noise reduction cover after being reduced for three times, so that the noise of the centrifugal fan is effectively reduced.
The present invention may be further configured in a preferred embodiment as: the sound absorption layer is a polyurethane fiber sound absorption plate or a mineral wool sound absorption plate.
Through above-mentioned technical scheme, mineral wool sound absorbing board surface treatment form is abundant, and panel has stronger decorative effect, and its surface is covered with the hole of depth, shape, aperture diverse, and to a great extent has reduced the propagation of noise. The polyurethane fiber sound-absorbing board is a material which is prepared by taking polyester fiber as a raw material through hot press molding and has the sound-absorbing function, and has a very good relieving effect on high-frequency high-decibel noise.
The present invention may be further configured in a preferred embodiment as: the base comprises two parallel supporting plates and a connecting plate fixed between the two supporting plates;
two can dismantle two risers of fixedly connected with and the mounting panel that is trapezoidal shape between the backup pad, the fan body passes through the bolt fastening and is in two between the riser, the motor is fixed on the mounting panel.
Through the technical scheme, when the centrifugal fan works, the connecting plate not only increases the structural strength between the supporting plates, but also keeps the supporting plates in good stability, so that the centrifugal fan is not easy to vibrate. The fan body is fixed between the risers for the work that the fan can be more stable, and the motor is fixed on the mounting panel, makes the rotation that the motor can be stable, simultaneously convenient to detach.
The present invention may be further configured in a preferred embodiment as: the damping mechanism comprises a plurality of springs and damping plates fixedly connected to two ends of the springs respectively, and the damping plates are fixed to two ends of the supporting plate along the length direction of the supporting plate respectively.
Through above-mentioned technical scheme, the spring can effectual absorption come from centrifugal fan's vibration energy to the production of noise has been reduced. Meanwhile, the plurality of vibration reduction plates are distributed around the base, so that the stability is improved.
The present invention may be further configured in a preferred embodiment as: the muffler is configured as a resistive muffler.
Through the technical scheme, the noise is reduced by mainly utilizing the porous sound-absorbing material, and the sound-absorbing material is fixed on the inner wall of the airflow channel or arranged in the pipeline according to a certain mode, so that the resistive silencer is formed. When sound waves enter the resistive muffler, a part of sound energy is rubbed in pores of the porous material and converted into heat energy to be dissipated, so that the sound waves passing through the muffler are weakened.
To sum up, the utility model discloses a following at least one useful technological effect:
1. when the centrifugal fan works, the noise generated by the rotation of the motor is diffused in the silencing cover and is difficult to spread outwards, and the transmission of the noise is reduced to a certain degree. Meanwhile, when the noise is conducted on the silencing plate, the energy of the noise is reduced, and the noise is further reduced. The vibration generated by the centrifugal fan during working reduces the vibration frequency under the action of the damping mechanism, so that the noise is fundamentally reduced, the noise generated by the fan during rotation can be effectively reduced by the silencer, and the noise reduction effect is further improved.
2. The elastic layer can absorb vibration energy generated by the rotation of the motor, and the transmission of vibration is reduced. The sound wave of the noise enters the foaming layer after passing through the elastic layer, a large number of hole structures in the foaming layer are rubbed, and partial sound energy is converted into heat energy to be dissipated, so that the intensity of the noise is further reduced. The waterproof layer can avoid external moisture from entering the interior of the motor to shorten the service life of the motor, effectively protects the elastic layer and the foaming layer and prolongs the service life of the silencing plate.
3. The sound absorption layer has the capacity of attenuating the intensity of sound waves or reflecting the sound waves, the sound waves reach the first sound absorption layer after passing through the elastic layer, the sound waves are conducted in the foaming layer after being reduced, the residual sound wave energy which is not completely absorbed by the foaming layer is conducted in the second sound absorption layer, and the noise is basically difficult to propagate out of the silencing cover after being reduced for three times, so that the noise of the centrifugal fan is effectively reduced.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a cross-sectional view of the present invention showing the acoustical panel.
Reference numerals: 1. a fan body; 11. an air outlet pipe; 12. a muffler; 2. a base; 21. a support plate; 22. a connecting plate; 23. a vertical plate; 24. mounting a plate; 3. a motor; 4. a vibration reduction mechanism; 41. a spring; 42. a vibration damping plate; 5. a sound deadening hood; 51. a frame; 52. a sound-absorbing panel; 521. an elastic layer; 522. a foamed layer; 523. a waterproof layer; 524. and a sound absorbing layer.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, for the utility model discloses a centrifugal fan with vibration/noise reduction device, including fan body 1, base 2 and motor 3, fan body 1 can dismantle with motor 3 and fix on base 2, and fixed connection can be dismantled with motor 3 to fan body 1, and the bottom surface of base 2 is provided with damping mechanism 4, and the outside of motor 3 is provided with amortization cover 5, and amortization cover 5 includes fixed connection frame 51 on base 2 and can dismantle a plurality of acoustical panels 52 of fixing in frame 51.
The inside of fan body 1 is provided with the flabellum of equidistance distribution, and the output of fan body 1 is fixed with out tuber pipe 11, and one side inner wall that goes out tuber pipe 11 is provided with muffler 12. The silencer 12 is configured as a resistive silencer that is primarily noise-reducing using porous sound-absorbing material, which is fixed to the inner wall of the gas flow channel or arranged in a pipe in a certain manner to form a resistive silencer. When sound waves enter the resistive muffler, a part of sound energy is rubbed in pores of the porous material and converted into heat energy to be dissipated, so that the sound waves passing through the muffler are weakened.
Further, the frame 51 includes support rods which are sequentially and vertically fixedly connected with each other, and limit grooves for sliding and embedding the sound-absorbing boards 52 are formed in the support rods. Before the centrifugal fan works, the silencing plates 52 are inserted and fixed in the limiting grooves, so that the outer side of the motor 3 forms the sealed square silencing cover 5, and the noise transmission during the working of the motor 3 is effectively reduced. When the motor 3 needs to be maintained or replaced, the silencing plate 52 is directly drawn out from the limiting groove, so that the motor 3 is conveniently detached from the base 2, the structure is simple, the use is convenient, and a good noise reduction effect is achieved.
Referring to fig. 1, the base 2 includes two mutually parallel support plates 21 and fixes the connecting plate 22 between two support plates 21, can dismantle two risers 23 of fixedly connected with and be trapezoidal mounting panel 24 between two support plates 21, and fan body 1 passes through the bolt fastening between two risers 23, and motor 3 fixes on mounting panel 24. When the centrifugal fan works, the connecting plate 22 not only increases the structural strength between the two supporting plates 21, but also keeps the supporting plates 21 in good stability, so that the centrifugal fan is not easy to vibrate. Fan body 1 is fixed between riser 23 for the work that the fan can be more stable, and motor 3 fixes on mounting panel 24, makes the rotation that motor 3 can be stable, simultaneously convenient to detach.
The damping mechanism 4 includes a plurality of springs 41 and damping plates 42 respectively fixedly connected to two ends of the springs 41, and the damping plates 42 are respectively fixed to two ends of the support plate 21 along the length direction thereof. The spring 41 can effectively absorb vibration energy from the centrifugal fan, thereby reducing noise generation. Meanwhile, the plurality of vibration reduction plates 42 are distributed around the base 2, so that the stability is improved.
Referring to fig. 2, the sound-absorbing panel 52 includes two elastic layers 521, a foam layer 522 and a waterproof layer 523, the foam layer 522 is disposed between the two elastic layers 521, and the waterproof layer 523 is fixed to a surface of the elastic layer 521 away from the foam layer 522. The elastic layer 521 can absorb the vibration energy generated by the rotation of the motor 3, thereby reducing the transmission of the vibration. The sound wave of the noise enters the foaming layer 522 after passing through the elastic layer 521, a large number of hole structures in the foaming layer 522 are rubbed, and part of sound energy is converted into heat energy to be dissipated, so that the intensity of the noise is further reduced. The waterproof layer 523 can prevent external moisture from entering the motor 3 to shorten the service life of the motor 3, and meanwhile, the elastic layer 521 and the foaming layer 522 are effectively protected, so that the service life of the sound-absorbing plate 52 is prolonged.
A sound absorbing layer is fixed between the foaming layer 522 and the elastic layer 521, and the sound absorbing coefficient of the sound absorbing layer is larger than that of the foaming layer 522. The sound absorption layer has the capacity of attenuating the intensity of sound waves or reflecting the sound waves, the sound waves reach the first sound absorption layer after passing through the elastic layer 521, the sound waves are conducted in the foaming layer 522 after being attenuated, the residual sound wave energy which is not completely absorbed by the foaming layer 522 is conducted in the second sound absorption layer, and the noise is basically difficult to propagate out of the silencing cover 5 after being attenuated for three times, so that the noise of the centrifugal fan is effectively reduced.
Furthermore, the sound absorption layer is a polyurethane fiber sound absorption plate or a mineral wool sound absorption plate. The surface treatment form of the mineral wool sound-absorbing board is rich, the board has a strong decorative effect, holes with different depths, shapes and apertures are distributed on the surface of the board, and the transmission of noise is reduced to a great extent. The polyurethane fiber sound-absorbing board is a material which is prepared by taking polyester fiber as a raw material through hot press molding and has the sound-absorbing function, and has a very good relieving effect on high-frequency high-decibel noise.
The implementation principle of the embodiment is as follows: when the centrifugal fan works, the noise generated by the rotation of the motor 3 is diffused in the silencing cover 5 and is difficult to spread outwards, and the transmission of the noise is reduced to a certain degree. Meanwhile, when the noise is conducted on the silencing plate 52, the energy of the noise is reduced, and the noise is further reduced. The vibration generated by the centrifugal fan during operation reduces the vibration frequency under the action of the damping mechanism, so that the noise is fundamentally reduced, the noise generated by the fan during rotation can be effectively reduced by the silencer 12, and the noise reduction effect is further improved.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. The utility model provides a centrifugal fan with vibration/noise reduction device, includes fan body (1), base (2) and motor (3), fan body (1) with motor (3) can be dismantled to be fixed on base (2), fan body (1) with motor (3) can dismantle fixed connection, its characterized in that: a vibration damping mechanism (4) is arranged on the bottom surface of the base (2), a silencing cover (5) is arranged on the outer side of the motor (3), and the silencing cover (5) comprises a frame (51) fixedly connected to the base (2) and a plurality of silencing plates (52) detachably fixed in the frame (51);
the fan is characterized in that fan blades distributed equidistantly are arranged inside the fan body (1), an air outlet pipe (11) is fixed at the output end of the fan body (1), and a silencer (12) is arranged on the inner wall of one side of the air outlet pipe (11).
2. The centrifugal fan with vibration and noise reduction device according to claim 1, wherein: the frame (51) comprises support rods which are sequentially and mutually perpendicular and fixedly connected, and limit grooves for sliding and embedding the sound-absorbing plates (52) are formed in the support rods.
3. The centrifugal fan with vibration and noise reduction device according to claim 2, wherein: the sound-absorbing plate (52) comprises two elastic layers (521), a foaming layer (522) and a waterproof layer (523), wherein the foaming layer (522) is arranged between the two elastic layers (521), and the waterproof layer (523) is fixed on one surface, far away from the foaming layer (522), of the elastic layer (521).
4. A centrifugal fan with vibration and noise reduction device according to claim 3, characterized in that: and a sound absorption layer is fixed between the foaming layer (522) and the elastic layer (521), and the sound absorption coefficient of the sound absorption layer is greater than that of the foaming layer (522).
5. The centrifugal fan with vibration and noise reduction device according to claim 4, wherein: the sound absorption layer is a polyurethane fiber sound absorption plate or a mineral wool sound absorption plate.
6. The centrifugal fan with vibration and noise reduction device according to claim 1, wherein: the base (2) comprises two parallel supporting plates (21) and a connecting plate (22) fixed between the two supporting plates (21);
two can dismantle two risers (23) of fixedly connected with and be mounting panel (24) of trapezoidal form between backup pad (21), fan body (1) passes through the bolt fastening two between riser (23), motor (3) are fixed on mounting panel (24).
7. The centrifugal fan with vibration and noise reduction device according to claim 6, wherein: the damping mechanism (4) comprises a plurality of springs (41) and damping plates (42) fixedly connected to two ends of the springs (41) respectively, and the damping plates (42) are fixed to two ends of the supporting plate (21) along the length direction of the supporting plate respectively.
8. The centrifugal fan with vibration and noise reduction device according to claim 1, wherein: the muffler (12) is configured as a resistive muffler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020393046.5U CN212318386U (en) | 2020-03-24 | 2020-03-24 | Centrifugal fan with vibration/noise reduction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020393046.5U CN212318386U (en) | 2020-03-24 | 2020-03-24 | Centrifugal fan with vibration/noise reduction device |
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| Publication Number | Publication Date |
|---|---|
| CN212318386U true CN212318386U (en) | 2021-01-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020393046.5U Expired - Fee Related CN212318386U (en) | 2020-03-24 | 2020-03-24 | Centrifugal fan with vibration/noise reduction device |
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| CN (1) | CN212318386U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855576A (en) * | 2021-03-16 | 2021-05-28 | 上海通用风机股份有限公司 | High-speed high-pressure small centrifugal fan |
| CN117759549A (en) * | 2023-12-29 | 2024-03-26 | 广东鑫风风机有限公司 | Noise reduction type centrifugal fan |
-
2020
- 2020-03-24 CN CN202020393046.5U patent/CN212318386U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855576A (en) * | 2021-03-16 | 2021-05-28 | 上海通用风机股份有限公司 | High-speed high-pressure small centrifugal fan |
| CN117759549A (en) * | 2023-12-29 | 2024-03-26 | 广东鑫风风机有限公司 | Noise reduction type centrifugal fan |
| CN117759549B (en) * | 2023-12-29 | 2024-07-19 | 广东鑫风风机有限公司 | Noise reduction type centrifugal fan |
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Granted publication date: 20210108 |