CN112664482B - Sound insulation cover for high-power high-decibel fan and noise control method - Google Patents
Sound insulation cover for high-power high-decibel fan and noise control method Download PDFInfo
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- CN112664482B CN112664482B CN202011494255.XA CN202011494255A CN112664482B CN 112664482 B CN112664482 B CN 112664482B CN 202011494255 A CN202011494255 A CN 202011494255A CN 112664482 B CN112664482 B CN 112664482B
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Abstract
The invention discloses a sound insulation cover for a high-power high-decibel fan and a noise treatment method, belonging to the field of noise treatment, and the sound insulation cover for the high-power high-decibel fan comprises a sound insulation outer shell arranged outside the fan, wherein the top of the sound insulation outer shell is provided with an air inlet channel, and an air inlet silencer is arranged in the air inlet channel; the air inlet of the air inlet channel is provided with a turbulent flow plate, one side of the turbulent flow plate is rotatably connected with the sound insulation shell, the other side of the turbulent flow plate is provided with a tension spring, and the other end of the tension spring is fixedly connected with the sound insulation shell. Through the angles of the turbulence plates under different wind forces, the gas in the sound-insulation outer shell enters the fan after being subjected to turbulence, so that vortex separation caused by unstable waveguide in the laminar flow boundary layer is avoided, the vortex separation is realized, and the noise can be reduced to a certain extent.
Description
Technical Field
The invention relates to the field of noise control, in particular to a sound insulation cover for a high-power high-decibel fan and a noise control method.
Background
The fan impeller is a component which cannot be separated from each fan type, and generates obvious noise under the conditions of high speed and low load, wherein the noise is mainly generated by interaction of army structures around the blades and a non-uniform flow field formed by design test rotation of the blade openings. This is just one of the reasons. The vortex flow of the fan in operation also generates a part of noise, and the reason for generating the noise by the vortex flow is mainly the incoming flow turbulence noise generated when the airflow with certain incoming flow turbulence flows to the blades. The fan flow passes over the blade surface due to turbulent boundary layer noise generated by the pulsating turbulent boundary layer, among other causes. The noise generated by the fan impeller can be reduced by a blade perforation method under the normal condition, partial airflow can flow to the low-pressure surface of the blade through the high-pressure surface of the blade by the perforation method, the separation point of the fan blade can be promoted to move downwards, the separation area of the outlet section of the blade is reduced, the strength and the size of the vortex of the separation area are reduced, and the noise is also reduced.
The existing sound-proof shield for the fan generally adopts some measures to insulate sound, so that the problem of noise generated by the fan under different working conditions is difficult to fundamentally reduce, the sound-proof effect is limited, and noise with different degrees can be transmitted out under different working conditions.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the sound insulation cover for the high-power high-decibel fan, and the internal airflow is adjusted according to different working conditions, so that the noise caused by the airflow is reduced, and the noise can be reduced under various working conditions.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a sound insulation cover for a high-power high-decibel fan, which comprises a sound insulation outer shell arranged outside the fan, wherein the top of the sound insulation outer shell is provided with an air inlet channel, and an air inlet silencer is arranged in the air inlet channel; the air inlet of the air inlet channel is provided with a turbulent flow plate, one side of the turbulent flow plate is rotatably connected with the sound insulation shell, the other side of the turbulent flow plate is provided with a tension spring, and the other end of the tension spring is fixedly connected with the sound insulation shell.
The invention has the preferable technical scheme that an inclined turbulence hole is arranged on the turbulence plate, one end of the inclined turbulence hole, which is close to the air inlet channel, is far away from the tension spring, and one end of the inclined turbulence hole, which is far away from the air inlet channel, is close to the tension spring.
The sound insulation shell is characterized in that a mute exhaust fan is arranged on the side wall of the sound insulation shell, an air outlet silencer is arranged at the air outlet end of the mute exhaust fan, and a check valve is arranged at the air inlet end of the mute exhaust fan.
The invention has the preferable technical scheme that a tension sensor is arranged at the joint of the tension spring and the sound insulation outer shell so as to control the start and stop of the silent exhaust fan according to the detection data of the tension sensor.
The invention has the preferable technical scheme that the side wall of the sound-proof shell is provided with a heat-radiating air inlet, a heat-radiating silencer is arranged at the position of the heat-radiating air inlet, and the heat-radiating air inlet is positioned on the side wall of the sound-proof shell at the end part of the fan driving motor.
The invention has the preferable technical scheme that one side of the sound insulation outer shell is provided with a fan air outlet, and a static pressure box is arranged in the fan air outlet.
The invention has the preferable technical scheme that a connecting hose is arranged at the air outlet of the fan and is connected with the air inlet end of the static pressure box.
The invention preferably adopts the technical scheme that the anti-overturn damping spring shock absorber is arranged at the bottom of the fan.
The sound insulation and sound absorption composite wallboard and the color steel rock wool sandwich board are sequentially arranged on the sound insulation shell from inside to outside, and the supporting steel frame is arranged on the innermost side of the sound insulation shell.
A noise control method of an acoustic shield adopting a high-power high-decibel fan comprises the following steps: step S00: a sound insulation cover is built on the outer side of the fan, and a tension spring with a proper specification is selected according to the air exhaust amount of the fan; step S10: controlling the mute exhaust fan to be started according to the data detected by the tension sensor so as to adjust the air pressure in the sound insulation outer shell; step S20: and after the fan is stopped, the waste heat is discharged through the mute exhaust fan.
The invention has the beneficial effects that:
the invention provides a sound insulation cover for a high-power high-decibel fan, which comprises a sound insulation outer shell arranged outside the fan, wherein the top of the sound insulation outer shell is provided with an air inlet channel, and an air inlet silencer is arranged in the air inlet channel; the air inlet of the air inlet channel is provided with a turbulent flow plate, one side of the turbulent flow plate is rotatably connected with the sound insulation shell, the other side of the turbulent flow plate is provided with a tension spring, and the other end of the tension spring is fixedly connected with the sound insulation shell. Through the angles of the turbulence plates under different wind forces, the gas in the sound-insulation outer shell enters the fan after being subjected to turbulence, so that vortex separation caused by unstable waveguide in the laminar boundary layer is avoided, the vortex separation is realized, and the noise can be reduced to a certain extent.
Drawings
Fig. 1 is a schematic view of a top view layout structure of a sound-proof enclosure for a high power high decibel fan according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a side view layout of an acoustic shield for a high power high decibel fan according to an embodiment of the present invention;
in the figure:
1. a sound-insulating outer shell; 2. an anti-toppling damping spring damper; 31. an air outlet silencer; 32. a mute exhaust fan; 33. a check valve; 11. a sound insulation and absorption composite wallboard; 12. color steel rock wool sandwich panels; 13. supporting the steel frame; 4. a heat dissipation muffler; 41. a heat dissipation air inlet; 51. an air outlet of the fan; 52. a static pressure box; 53. a connecting hose; 61. an air inlet channel; 62. an air intake silencer; 7. a turbulent flow plate; 71. oblique turbulence holes; 8. a tension spring; 9. a tension sensor.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1-2, the present embodiment provides a sound insulation cover for a high-power high-decibel fan, including a sound insulation outer shell 1 disposed outside the fan, an air inlet channel 61 is disposed at the top of the sound insulation outer shell 1, and an air inlet silencer 62 is disposed inside the air inlet channel 61; a turbulent flow plate 7 is arranged at an air outlet of the air inlet channel 61, one side of the turbulent flow plate 7 is rotatably connected with the sound insulation shell 1, the other side of the turbulent flow plate 7 is provided with a tension spring 8, and the other end of the tension spring 8 is fixedly connected with the sound insulation shell 1. When the air discharge quantity is different, the air quantity entering the air inlet channel 61 is different, so that different pressures can be applied to the turbulence plate 7, and the turbulence plate 7 can be inclined at different angles, so that different turbulence effects are caused. Therefore, after the gas enters the fan after being subjected to turbulent flow, vortex separation caused by unstable waveguide in the laminar flow boundary layer is avoided, so that the vortex separation is realized, and the noise can be reduced to a certain extent.
Preferably, an inclined turbulence hole 71 is formed in the turbulence plate 7, one end, close to the air inlet channel 61, of the inclined turbulence hole 71 is far away from the tension spring 8, and one end, far away from the air inlet channel 61, of the inclined turbulence hole 71 is close to the tension spring 8. The oblique turbulence holes 71 are designed so that when the wind power of the air inlet channel 61 is small, the turbulence plate 7 is in a more horizontal state under the action of the tension spring 8, and therefore air can be efficiently turbulent through the oblique turbulence holes 71; when the wind power of the air inlet channel 61 is larger, the turbulent plate 7 is inclined, so that the inclined turbulent holes 71 are in an approximately vertical state, the intensity of the turbulent flow is reduced, the wind speed is higher, and if the stronger turbulent flow is kept, the turbulent plate 7 generates larger noise.
Preferably, 1 lateral wall of sound insulation shell body is provided with silence exhaust fan 32, the air-out end of silence exhaust fan 32 is provided with air-out silencer 31, the air inlet end of silence exhaust fan 32 is provided with check valve 33. The mute exhaust fan 32 can conveniently adjust the internal air pressure, and the noise can be effectively reduced through the control of the air pressure. The noise generated by high wind speed and high wind pressure is increased, and the noise can be effectively controlled by keeping the inside of the mute exhaust fan 32 not easy to form positive and negative pressure but keeping relatively stable pressure.
Preferably, a tension sensor 9 is arranged at the joint of the tension spring 8 and the sound insulation outer shell 1, so as to control the start and stop of the silent exhaust fan 32 according to the detection data of the tension sensor 9. The pressure on the turbulent plate 7 is detected through the tension sensor 9, so that the wind power change condition of the air inlet channel 61 can be known, if the external wind direction and the wind power change, the wind power of the air inlet channel 61 can also be changed to a certain degree, so that the tension sensor 9 can detect different values, when the entering air pressure is increased suddenly, the mute exhaust fan 32 is turned on, the air pressure can be reduced in an auxiliary manner, and the necessary large air pressure generates large noise.
Preferably, the side wall of the sound insulation outer shell 1 is provided with a heat dissipation air inlet 41, a heat dissipation silencer 4 is arranged at the position of the heat dissipation air inlet 41, and the heat dissipation air inlet 41 is located on the side wall of the sound insulation outer shell 1 at the end part of the fan driving motor. The fan can generate certain heat during operation, the heat can be effectively cooled through the heat dissipation air inlet 41, and the heat dissipation silencer 4 can avoid generating larger noise during air inlet.
Preferably, a fan outlet 51 is arranged on one side of the sound insulation outer shell 1, and a static pressure box 52 is arranged in the fan outlet 51. Stabilize the air-out, the noise reduction. Preferably, a connecting hose 53 is arranged at the air outlet 51 of the fan and connected with the air inlet end of the static pressure box 52. The vibration of the fan is prevented from being transmitted to the static pressure box 52, so that the static pressure box 52 is not easy to generate noise. Preferably, the bottom of the fan is provided with an anti-overturning damping spring shock absorber 2. The vibration of the fan can be reduced, and the noise generated by the fan is reduced.
Preferably, sound insulation and absorption composite wall plate 11 and color steel rock wool sandwich plate 12 are sequentially arranged from inside to outside on sound insulation shell body 1, and support steel frame 13 is arranged on the innermost side of sound insulation shell body 1. Can play a better sound insulation effect.
A noise control method of an acoustic shield adopting a high-power high-decibel fan comprises the following steps: step S00: a sound insulation cover is built on the outer side of the fan, and a tension spring 8 with a proper specification is selected according to the air exhaust amount of the fan; step S10: controlling the mute exhaust fan 32 to be started according to the data detected by the tension sensor 9 so as to adjust the air pressure in the sound insulation outer shell 1; step S20: after the fan is stopped, the waste heat is exhausted through the mute exhaust fan 32. Noise can be reduced to the greatest extent, and under different working conditions, noise reduction effects of different degrees are provided.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.
Claims (9)
1. The utility model provides a sound insulation cover for high-power high decibel fan which characterized in that:
the air conditioner comprises a sound insulation outer shell (1) arranged on the outer side of a fan, wherein an air inlet channel (61) is arranged at the top of the sound insulation outer shell (1), and an air inlet silencer (62) is arranged in the air inlet channel (61);
a turbulent flow plate (7) is arranged at an air outlet of the air inlet channel (61), one side of the turbulent flow plate (7) is rotatably connected with the sound insulation outer shell (1), a tension spring (8) is arranged on the other side of the turbulent flow plate (7), and the other end of the tension spring (8) is fixedly connected with the sound insulation outer shell (1);
the utility model discloses a silence exhaust fan, including sound insulation shell body (1), pull spring (8) and sound insulation shell body (1), the lateral wall is provided with silence exhaust fan (32), pull spring (8) with sound insulation shell body (1) junction is provided with force sensor (9), in order to according to force sensor's (9) detection data control the opening of silence exhaust fan (32) stops.
2. The acoustic enclosure for high power, high decibel fan of claim 1 wherein:
an inclined turbulence hole (71) is formed in the turbulence plate (7), one end, close to the air inlet channel (61), of the inclined turbulence hole (71) is far away from the tension spring (8), and one end, far away from the air inlet channel (61), of the inclined turbulence hole (71) is close to the tension spring (8).
3. The acoustic enclosure for high power, high decibel fan of claim 1 wherein:
the air outlet end of the mute exhaust fan (32) is provided with an air outlet silencer (31), and the air inlet end of the mute exhaust fan (32) is provided with a check valve (33).
4. The acoustic enclosure for high power, high decibel fan of claim 3 wherein:
the lateral wall of the sound insulation outer shell (1) is provided with a heat dissipation air inlet (41), a heat dissipation silencer (4) is arranged at the position of the heat dissipation air inlet (41), and the heat dissipation air inlet (41) is located at the end part of a fan driving motor and is located on the lateral wall of the sound insulation outer shell (1).
5. The acoustic enclosure for high power, high decibel fan of claim 1 wherein:
a fan air outlet (51) is formed in one side of the sound insulation outer shell (1), and a static pressure box (52) is arranged in the fan air outlet (51).
6. The acoustic enclosure for high power, high decibel fan of claim 5 wherein:
a connecting hose (53) is arranged at the air outlet (51) of the fan and is connected with the air inlet end of the static pressure box (52).
7. The acoustic enclosure for high power, high decibel fan of claim 6 wherein:
the bottom of the fan is provided with an overturn-preventing damping spring shock absorber (2).
8. The acoustic enclosure for high power, high decibel fan of claim 1 wherein:
the sound insulation shell body (1) has set gradually sound insulation and absorption composite wall board (11), various steel rock wool battenboard (12) from interior to exterior, sound insulation shell body (1) is provided with support steelframe (13) the most inboard.
9. A noise abatement method using the acoustic enclosure for a high power high decibel fan of claim 1, characterized by:
the method comprises the following steps: step S00: a sound insulation cover is built on the outer side of the fan, and a tension spring (8) with a proper specification is selected according to the air exhaust amount of the fan;
step S10: controlling the mute exhaust fan (32) to be started according to the data detected by the tension sensor (9) so as to adjust the air pressure in the sound insulation outer shell (1);
step S20: after the fan is stopped, the waste heat is exhausted by a mute exhaust fan (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011494255.XA CN112664482B (en) | 2020-12-17 | 2020-12-17 | Sound insulation cover for high-power high-decibel fan and noise control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011494255.XA CN112664482B (en) | 2020-12-17 | 2020-12-17 | Sound insulation cover for high-power high-decibel fan and noise control method |
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| Publication Number | Publication Date |
|---|---|
| CN112664482A CN112664482A (en) | 2021-04-16 |
| CN112664482B true CN112664482B (en) | 2022-08-05 |
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| CN202011494255.XA Active CN112664482B (en) | 2020-12-17 | 2020-12-17 | Sound insulation cover for high-power high-decibel fan and noise control method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204512001U (en) * | 2014-12-30 | 2015-07-29 | 凯天环保科技股份有限公司 | A kind of blower fan sound-insulating cover |
| CN105795673A (en) * | 2016-03-16 | 2016-07-27 | 浙江工贸职业技术学院 | Hair drier with air volume adjusting function |
| CN210623221U (en) * | 2019-10-12 | 2020-05-26 | 福建省中孚检测技术有限公司 | Noise elimination fan on inductively coupled plasma mass spectrum |
| CN211398600U (en) * | 2019-12-02 | 2020-09-01 | 来安野牛暖通设备有限公司 | Air volume adjusting valve with reset function |
| CN211623765U (en) * | 2019-11-05 | 2020-10-02 | 江苏亚太安信达铝业有限公司 | Low-noise blower for smelting furnace |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2933148B1 (en) * | 2008-06-25 | 2010-08-20 | Snecma | TURBOMACHINE COMPRESSOR |
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- 2020-12-17 CN CN202011494255.XA patent/CN112664482B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204512001U (en) * | 2014-12-30 | 2015-07-29 | 凯天环保科技股份有限公司 | A kind of blower fan sound-insulating cover |
| CN105795673A (en) * | 2016-03-16 | 2016-07-27 | 浙江工贸职业技术学院 | Hair drier with air volume adjusting function |
| CN210623221U (en) * | 2019-10-12 | 2020-05-26 | 福建省中孚检测技术有限公司 | Noise elimination fan on inductively coupled plasma mass spectrum |
| CN211623765U (en) * | 2019-11-05 | 2020-10-02 | 江苏亚太安信达铝业有限公司 | Low-noise blower for smelting furnace |
| CN211398600U (en) * | 2019-12-02 | 2020-09-01 | 来安野牛暖通设备有限公司 | Air volume adjusting valve with reset function |
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