CN210483885U - Noise reduction equipment for mobile power station - Google Patents
Noise reduction equipment for mobile power station Download PDFInfo
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- CN210483885U CN210483885U CN201921532497.6U CN201921532497U CN210483885U CN 210483885 U CN210483885 U CN 210483885U CN 201921532497 U CN201921532497 U CN 201921532497U CN 210483885 U CN210483885 U CN 210483885U
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Abstract
A noise reduction device of a mobile power station comprises an active noise reduction device; the active noise reduction device comprises a first sound pickup for detecting low-frequency noise sound waves at the position of the generator set to generate noise signals, a second sound pickup for detecting the low-frequency noise sound waves at the position of the air outlet to generate feedback signals, a noise reduction controller for responding the noise signals and the feedback signals to generate noise reduction signals, and an energy converter for responding the noise reduction signals to vibrate to generate the low-frequency noise reduction sound waves; the noise reduction board further comprises a vibration and noise reduction damping coating layer. The utility model utilizes the transducer to vibrate the generated low-frequency noise reduction sound wave and the low-frequency noise sound wave at the wind gap to interfere and cancel, thereby reducing the influence of the low-frequency noise generated when the generator set operates on the outside; the damping dope layer of making an uproar falls in the damping that makes an uproar through falling the board of making an uproar and add produces the drawing and pressing deformation power consumption in vibration in-process inside, further reduces the high frequency noise that the generating set produced when operation to external influence.
Description
Technical Field
The utility model belongs to the technical field of make an uproar, especially, relate to a mobile power station equipment of making an uproar falls.
Background
In a vehicle-mounted equipment sequence, a general mobile power station plays an important role as an important power supply device, and with the informatization, the modernization and the continuous improvement of the electrification degree of equipment, the dependence of the equipment on the mobile power station is higher and higher, and the power guarantee becomes one of important measurement values for guaranteeing the continuation of tasks and the exertion of efficiency.
At present, a mobile power station generally uses a generator set consisting of a diesel engine and a generator to generate power, and the noise generated during the operation of the generator set is very large, so that the noise can greatly affect the surrounding environment or pedestrians; in order to reduce the noise generated during the operation of the generator set, the prior art generally adopts a passive noise reduction mode, namely a noise reduction shell consisting of a plurality of noise reduction plates is arranged around the generator set; the noise reduction plate consists of an outer plate layer, a sound absorption cotton layer and an inner plate layer; in order to meet the heat dissipation requirement of the generator set, an air inlet and an air outlet are formed in the noise reduction shell; because the generator set and the noise reduction shell are both arranged on the same vehicle-mounted platform, when the generator set runs, the noise reduction shell vibrates along with the generator set. The passive noise reduction mode can reduce high-frequency noise in a limited way, but cannot reduce low-frequency noise, and the noise reduction effect of the existing noise reduction technology of the mobile power station cannot meet the actual requirement.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems, the utility model provides a noise reduction device for a mobile power station, which can reduce the influence of low-frequency noise generated when a generating set operates on the outside; further, the influence of high-frequency noise generated during the operation of the generator set on the outside can be further reduced.
The technical scheme of the utility model as follows:
a noise reduction device of a mobile power station comprises an active noise reduction device; the active noise reduction device comprises a first sound pickup for detecting low-frequency noise sound waves at the position of the generator set to generate noise signals, a second sound pickup for detecting the low-frequency noise sound waves at the position of the air outlet to generate feedback signals, a noise reduction controller for responding the noise signals and the feedback signals to generate noise reduction signals, and an energy converter for responding the noise reduction signals to vibrate to generate the low-frequency noise reduction sound waves; the output end of the first sound pick-up and the output end of the second sound pick-up are respectively connected with the first input end and the second input end of the noise controller; the output end of the noise reduction controller is connected with the input end of the energy converter; the first sound pickup is arranged on the generator set; the second sound pickup is arranged on the noise reduction plate; the energy converter is arranged between the generator set and the air outlet.
The noise reduction plate also comprises a vibration and noise reduction damping coating layer; the damping dope layer of making an uproar falls in the damping and inhales the cotton layer parallel arrangement of sound.
The damping dope layer of making an uproar falls in the damping sets up between outer slab layer and interior plate layer.
The sound-absorbing cotton layer is composed of an environment-friendly sound-absorbing cotton layer and a superfine sound-absorbing cotton layer.
Also comprises a silencer; the silencer cover is arranged on the air outlet and is detachably connected with the noise reduction plate.
Compared with the prior art, the utility model discloses increased by first adapter, second adapter, fallen the device of making an uproar and falling the initiative that controller and transducer constitute of making an uproar. Detecting a low-frequency noise sound wave at an engine block by a first sound pickup to generate a noise signal; the second sound pick-up detects low-frequency noise sound waves at the air outlet to generate a feedback signal; the noise reduction controller responds to the noise signal and the feedback signal to generate a noise reduction signal; the transducer responds to the noise reduction signal to vibrate to generate low-frequency noise reduction sound waves; the low-frequency noise generated when the generator set operates is reduced to influence the outside through the interference cancellation of the low-frequency noise reduction sound wave and the low-frequency noise sound wave at the air outlet. The utility model discloses a board of making an uproar falls has increased the damping dope layer of making an uproar of damping, and when generating set operation, the board of making an uproar falls containing the damping dope layer of making an uproar falls in the damping along with generating set vibrates together, and the damping dope layer of making an uproar falls in the damping is inside to be produced and draw the pressure deformation and consume energy in the vibration process, further reduces the high frequency noise that generates when generating set operation to external influence.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, but the described drawings are only some embodiments of the present invention, not all embodiments of the present invention.
Fig. 1 is a special functional block diagram of the active noise reduction device of the present invention;
fig. 2 is a sectional view of the noise reduction plate of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, wherein like reference numerals represent like parts in the drawings. It should be noted that the described embodiments are only some of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.
As shown in fig. 1 and 2, a noise reduction apparatus for a mobile power station includes an active noise reduction device; the active noise reduction device comprises a first sound pickup for detecting low-frequency noise sound waves at the position of the generator set to generate noise signals, a second sound pickup for detecting the low-frequency noise sound waves at the position of the air outlet to generate feedback signals, a noise reduction controller for responding the noise signals and the feedback signals to generate noise reduction signals, and an energy converter for responding the noise reduction signals to vibrate to generate the low-frequency noise reduction sound waves; the output end of the first sound pick-up and the output end of the second sound pick-up are respectively connected with the first input end and the second input end of the noise controller; the output end of the noise reduction controller is connected with the input end of the energy converter; the first sound pickup is arranged on the generator set; the second sound pickup is arranged on the noise reduction plate; the energy converter is arranged between the generator set and the air outlet.
In order to further reduce high-frequency noise, the noise reduction plate also comprises a vibration and noise reduction damping paint layer 1; damping dope layer 1 and the cotton layer parallel arrangement of inhaling the sound of making an uproar fall in the damping. The vibration and noise reduction damping coating layer 1 can be coated on one side of the outer plate layer and vibrates along with the outer plate layer when the generator set runs; or may be applied to one side of the inner ply to vibrate with the inner ply during operation of the generator set.
In order to reduce the influence of the vibration and noise reduction damping coating layer 1 from the external environment, the vibration and noise reduction damping coating layer 1 is arranged between the outer plate layer 2 and the inner plate layer 3. The vibration and noise reduction damping paint layer 1 can be coated on the inner side of the outer plate layer or the inner plate layer.
In order to further reduce high-frequency noise, the sound-absorbing cotton layer is composed of an environment-friendly sound-absorbing cotton layer 4 and an ultrafine sound-absorbing cotton layer 5. The superfine holes in the superfine sound absorption cotton layer 5 increase the interference times of the high-frequency noise sound waves by increasing the reflection times of the high-frequency noise sound waves in the superfine holes, and further reduce the high-frequency noise sound waves.
In order to further reduce the noise at the air outlet, the silencer is also included; the silencer cover is arranged on the air outlet and is detachably connected with the noise reduction plate.
The sound pick-up is an MP201 type noise reduction microphone; the noise reduction controller includes an AS3435 audio processor; the transducer is an ES300 type loudspeaker; the vibration and noise reduction damping coating layer 1 is an MDC-A type vibration and noise reduction damping coating; the environment-friendly sound-absorbing cotton layer is polyester fiber sound-absorbing cotton; the superfine sound-absorbing cotton layer 5 is made of glass fiber sound-absorbing cotton.
The working principle is as follows: when the generator set operates, a first sound pickup detects low-frequency noise sound waves at the generator set to generate a first noise signal; the noise reduction controller generates a first noise reduction signal in response to the first noise signal; the transducer responds to the first noise reduction signal to vibrate to generate a first low-frequency noise reduction sound wave; the first low-frequency noise reduction sound wave and the noise sound wave are subjected to interference cancellation at the air outlet; the second sound pick-up detects low-frequency noise sound waves at the air outlet to generate a first feedback signal; the noise reduction controller responds to the first noise signal and the first feedback signal to generate a second noise reduction signal; the transducer responds to the second noise reduction signal to vibrate to generate second low-frequency noise reduction sound waves; the second low-frequency noise reduction sound waves and the noise sound waves are further subjected to interference cancellation at the air outlet; the influence of low-frequency noise generated when the generator set runs on the outside can be reduced by circulating the steps. The damping dope layer 1, the environment-friendly sound-absorbing cotton layer 4 and the superfine sound-absorbing cotton layer 5 in the noise reduction plate absorb high-frequency noise, and the influence of the high-frequency noise generated when the generator set operates on the outside can be further reduced.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (5)
1. A mobile power station noise reduction device is characterized in that: comprises an active noise reduction device; the active noise reduction device comprises a first sound pickup for detecting low-frequency noise sound waves at the position of the generator set to generate noise signals, a second sound pickup for detecting the low-frequency noise sound waves at the position of the air outlet to generate feedback signals, a noise reduction controller for responding the noise signals and the feedback signals to generate noise reduction signals, and an energy converter for responding the noise reduction signals to vibrate to generate the low-frequency noise reduction sound waves; the output end of the first sound pick-up and the output end of the second sound pick-up are respectively connected with the first input end and the second input end of the noise controller; the output end of the noise reduction controller is connected with the input end of the energy converter; the first sound pickup is arranged on the generator set; the second sound pickup is arranged on the noise reduction plate; the energy converter is arranged between the generator set and the air outlet.
2. A mobile station noise reduction device according to claim 1, characterized in that: the noise reduction plate also comprises a vibration and noise reduction damping coating layer; the damping dope layer of making an uproar falls in the damping and inhales the cotton layer parallel arrangement of sound.
3. A mobile station noise reduction device according to claim 2, characterized in that: the damping dope layer of making an uproar falls in the damping sets up between outer slab layer and interior plate layer.
4. A mobile station noise reduction device according to claim 2, characterized in that: the sound-absorbing cotton layer is composed of an environment-friendly sound-absorbing cotton layer and a superfine sound-absorbing cotton layer.
5. A mobile station noise reduction device according to claim 1, characterized in that: also comprises a silencer; the silencer cover is arranged on the air outlet and is detachably connected with the noise reduction plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921532497.6U CN210483885U (en) | 2019-09-16 | 2019-09-16 | Noise reduction equipment for mobile power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921532497.6U CN210483885U (en) | 2019-09-16 | 2019-09-16 | Noise reduction equipment for mobile power station |
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| Publication Number | Publication Date |
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| CN210483885U true CN210483885U (en) | 2020-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921532497.6U Active CN210483885U (en) | 2019-09-16 | 2019-09-16 | Noise reduction equipment for mobile power station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113539226A (en) * | 2021-06-02 | 2021-10-22 | 国网河北省电力有限公司电力科学研究院 | Active noise reduction control method for transformer substation |
-
2019
- 2019-09-16 CN CN201921532497.6U patent/CN210483885U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113539226A (en) * | 2021-06-02 | 2021-10-22 | 国网河北省电力有限公司电力科学研究院 | Active noise reduction control method for transformer substation |
| CN113539226B (en) * | 2021-06-02 | 2022-08-02 | 国网河北省电力有限公司电力科学研究院 | Active noise reduction control method for transformer substation |
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| GR01 | Patent grant | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: 450001 No.50 Dongqing street, high tech Development Zone, Zhengzhou City, Henan Province Patentee after: Zhengzhou Foguang power generation equipment Co.,Ltd. Address before: 450001 No.50 Dongqing street, high tech Development Zone, Zhengzhou City, Henan Province Patentee before: ZHENGZHOU FOGUANG POWER GENERATION EQUIPMENT Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |