CN111022379A - Noise reduction test device for centrifugal blower - Google Patents
Noise reduction test device for centrifugal blower Download PDFInfo
- Publication number
- CN111022379A CN111022379A CN201911267528.4A CN201911267528A CN111022379A CN 111022379 A CN111022379 A CN 111022379A CN 201911267528 A CN201911267528 A CN 201911267528A CN 111022379 A CN111022379 A CN 111022379A
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- China
- Prior art keywords
- noise reduction
- cover
- centrifugal blower
- frame
- shield
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
- F04D29/664—Sound attenuation by means of sound absorbing material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a noise reduction test device for a centrifugal blower, which comprises a rectangular frame; the upper end and the lower end of the frame are respectively covered with the top cover and the bottom plate, and the four side walls of the frame are covered with the side plates; the inner surface of the top cover, the inner surface of the bottom plate and the inner surface of the side plate are respectively paved with a sound absorption and insulation module; the inner surface of the bottom plate is provided with a fan fixing seat, and the top cover is provided with a blower air outlet; the upper part of the side plate on the front surface of the frame is provided with an air inlet of the sound-proof shield, the outer surface of the side plate on the front surface of the frame is provided with a fixed shield, and the fixed shield is sleeved with a movable shield. The noise reduction test device for the centrifugal blower can simulate a skid-mounted noise reduction environment of the centrifugal blower, provides a test environment for selection and structural arrangement of materials of a skid-mounted internal sound absorption and insulation module and design of a noise elimination structure in a skid-mounted air inlet channel, and has the characteristics of convenience in use and good test effect.
Description
Technical Field
The invention belongs to the field of sound insulation and noise reduction, and particularly relates to a noise reduction test device for a centrifugal blower.
Background
Centrifugal air-blower is extensive being applied to the environmental protection, fields such as manufacturing, for producing the delivery air, it can produce huge noise at the during operation, noise when in order to reduce the air-blower operation, the air-blower producer can dispose a better syllable-dividing sled dress of leakproofness for the air-blower, sound absorbing structure is taken to the inside wall, the enclosed construction through sled dress keeps apart the noise of air-blower, the noise frequency spectrum characteristic difference of different air-blowers is very big, different sound absorbing material's sound absorption characteristic is also different, often need pertinence configuration design, select suitable sound absorption sound insulation material and compound mode to be the important link in the design of syllable-dividing sled dress on sled dress lateral wall.
The centrifugal blower needs to intake air, so an air inlet channel is required to be arranged on the skid-mounted blower, the air inlet channel is the main part of noise leakage, a noise elimination structure is required to be arranged on the skid-mounted air inlet channel, and a sound absorption material is arranged in the noise elimination structure, so that the noise of the blower can be maximally reduced from being diffused outwards through the air inlet. The cross-sectional size of the air inlet channel can directly influence the noise reduction effect, because the overlarge cross-sectional area of the flow channel can cause a large amount of noise in the skid-mounted air conditioner to leak out, while the undersized cross-sectional area is favorable for eliminating noise radiation in the skid-mounted air conditioner, but can cause the air speed of the flow channel to be high and generate higher pneumatic noise, so that air blowers with different air volumes need to use different air inlet areas; on the other hand, different blower noise characteristics are different, or the high-frequency component is the main component, or the low-frequency component is the main component, or the wide-spectrum noise, and different types of sound absorption materials are required to be configured according to different noise characteristics to achieve the best noise reduction effect.
In the prior art, sound absorption materials are usually selected and the size of the cross section of an air inlet channel of a blower is determined according to calculation, but noise is a very complex problem, the best noise reduction effect cannot be achieved frequently only through calculation, a corresponding simulation noise reduction experimental device is needed, a basis is provided for noise reduction design of skid-mounted blowers, and the noise reduction capacity of the skid-mounted blowers is maximized.
Disclosure of Invention
In view of this, the invention aims to provide a noise reduction test device for a centrifugal blower, which can simulate a skid-mounted noise reduction environment of the centrifugal blower, provide a test environment for selection and structural arrangement of materials of a skid-mounted internal sound absorption and insulation module and design of a noise elimination structure in a skid-mounted air inlet channel, and has the characteristics of convenience in use and good test effect.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a noise reduction test apparatus for a centrifugal blower includes a rectangular frame; the upper end and the lower end of the frame are respectively covered with the top cover and the bottom plate, and the four side walls of the frame are covered with the side plates; the inner surface of the top cover, the inner surface of the bottom plate and the inner surface of the side plate are respectively paved with a sound absorption and insulation module; the inner surface of the bottom plate is provided with a fan fixing seat, and the top cover is provided with a blower air outlet; the upper part of a side plate on the front surface of the frame is provided with a sound-proof shield air inlet, the outer surface of the side plate on the front surface of the frame is provided with a fixed shield, the fixed shield is sleeved with a movable shield, the bottom of the movable shield is provided with a movable shield air inlet, the top of the fixed shield is provided with a fixed shield air inlet, and the fixed shield air inlet and the sound-proof shield air inlet are arranged in an aligned manner; the surfaces of the movable cover opposite to the fixed cover are provided with sound absorption and insulation modules; an air circulation channel is formed between the movable cover and the fixed cover.
Further, a distance adjusting bolt is arranged between the movable cover and the fixed cover; the movable hood moves back and forth in a direction perpendicular to the surface of the fixed hood.
Furthermore, a side plate handle is arranged on the side plate.
Furthermore, a forklift hole is formed in the bottom plate.
Furthermore, the bottom of the side plate on the front surface of the frame is provided with a wire inlet.
Furthermore, a movable cover fastening screw is arranged between the movable cover and the fixed cover.
Furthermore, the inner surface of the top cover, the inner surface of the bottom plate and the inner surface of the side plate are provided with punching plates fixedly connected through screws, and the sound absorption and insulation module is arranged on the punching plates.
Compared with the prior art, the noise reduction test device for the centrifugal blower has the following advantages: can simulate the environment of making an uproar of falling of centrifugal blower sled dress, for the selection, the structure setting of sled dress inside sound absorption and insulation module material and sled dress inlet channel in the noise-damping structure design, provide experimental test environment, have the characteristics that use is convenient and experimental effectual.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In the drawings:
FIG. 1 is a schematic view of a first structure of a noise reduction testing apparatus for a centrifugal blower according to an embodiment of the present invention;
FIG. 2 is a second structural schematic diagram of a noise reduction testing apparatus for a centrifugal blower according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a noise reduction testing apparatus for a centrifugal blower according to an embodiment of the present invention;
FIG. 4 is a schematic front view of a noise reduction testing apparatus for a centrifugal blower according to an embodiment of the present invention;
fig. 5 is a schematic view of an air inlet of a noise reduction test device soundproof cover for a centrifugal blower according to an embodiment of the present invention.
Description of reference numerals:
1-a movable cover; 2-fixing the cover; 3-a top cover; 31-a base plate; 4-a frame; 5-side plate; 6-side plate handle; 7-forklift holes; 8-spacing adjustment bolts; 9-air outlet of blower; 10-a fan fixing seat; 14-sound absorption and insulation module; 15-air inlet of movable cover; 16-an air inlet of the soundproof cover; 17-movable cover fastening screws; 18-fixing the cover air inlet; 19-inlet wire.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 to 5, a noise reduction test apparatus for a centrifugal blower includes a rectangular frame 4; the upper end and the lower end of the frame 4 are respectively covered with the top cover 3 and the bottom plate 31, and four side walls of the frame 4 are covered with the side plates 5; the sound absorption and insulation modules 14 are paved on the inner surface of the top cover 3, the inner surface of the bottom plate 31 and the inner surface of the side plate 5; the inner surface of the bottom plate 31 is provided with a fan fixing seat 10, and the top cover 3 is provided with a blower air outlet 9; a sound-proof cover air inlet 16 is formed in the upper portion of a side plate 5 on the front surface of the frame 4, a fixed cover 2 is arranged on the outer surface of the side plate 5 on the front surface of the frame 4, a movable cover 1 is sleeved on the fixed cover 2, a movable cover air inlet 15 is formed in the bottom of the movable cover 1, a fixed cover air inlet 18 is formed in the top of the fixed cover 2, and the fixed cover air inlet 18 and the sound-proof cover air inlet 16 are arranged in an aligned mode; the surfaces of the movable cover 1 opposite to the fixed cover 2 are provided with sound absorption and insulation modules 14; an air circulation channel is formed between the movable cover 1 and the fixed cover 2.
In this embodiment, the centrifugal blower is mounted on the blower holder 10, the outlet duct of the centrifugal blower is connected to the blower outlet 9, and the outside air enters the skid-mounted case through the movable cover air inlet 15, the fixed cover air inlet 18 and the soundproof cover air inlet 16.
As shown in fig. 1-5, a spacing adjusting bolt 8 is arranged between the movable cover 1 and the fixed cover 2; the movable hood 1 moves forward and backward in a direction perpendicular to the surface of the fixed hood 2.
In this embodiment, the distance adjusting bolt 8 passes through the threaded hole arranged on the movable cover 1, the top end of the distance adjusting bolt is pressed against the fixed cover 2, and the movable cover 1 is sleeved on the fixed cover 2, so that the distance adjusting bolt 8 is rotated to adjust the vertical distance between the movable cover 1 and the fixed cover 2, namely, the sectional area of the skid-mounted air inlet channel is adjusted.
As shown in fig. 1-5, a side panel handle 6 is provided on the side panel 5.
As shown in fig. 1-5, the bottom plate 31 is provided with a forklift aperture 7.
As shown in fig. 1 to 5, the bottom of the side plate 5 of the front surface of the frame 4 is provided with a wire inlet 19.
As shown in fig. 1-5, a movable cover fastening screw 17 is provided between the movable cover 1 and the fixed cover 2.
The movable cover fastening screw 17 plays a role in auxiliary fixation, and when the vertical distance between the movable cover 1 and the fixed cover 2 needs to be adjusted, the movable cover fastening screw 17 is firstly unscrewed.
As shown in fig. 1 to 5, the inner surface of the top cover 3, the inner surface of the bottom plate 31 and the inner surface of the side plate 5 are provided with punching plates fixedly connected by screws, and the sound absorption and insulation module 14 is arranged on the punching plates.
When the sound absorption and insulation module 14 made of different materials needs to be replaced to perform a noise reduction effect test, the whole punching plate with the sound absorption and insulation module 14 can be replaced quickly, and the test efficiency is improved.
In this embodiment, an operator can mount the sound absorption and insulation modules 14 made of different materials on the opposite surfaces of the skid-mounted inner and movable covers 1 and the fixed cover 2 according to design requirements, and can change the vertical distance between the movable cover 1 and the fixed cover 2 to realize different noise reduction material selections and structural design tests.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A noise reduction test device for a centrifugal blower is characterized in that: a frame (4) comprising a rectangular shape; the upper end and the lower end of the frame (4) are respectively covered with the top cover (3) and the bottom plate (31), and four side walls of the frame (4) are covered with the side plates (5); the inner surfaces of the top cover (3), the bottom plate (31) and the side plates (5) are paved with sound absorption and insulation modules (14); a fan fixing seat (10) is arranged on the inner surface of the bottom plate (31), and a blower air outlet (9) is arranged on the top cover (3); the upper part of the side plate (5) on the front surface of the frame (4) is provided with a sound-proof shield air inlet (16), the outer surface of the side plate (5) on the front surface of the frame (4) is provided with a fixed shield (2), the fixed shield (2) is sleeved with a movable shield (1), the bottom of the movable shield (1) is provided with a movable shield air inlet (15), the top of the fixed shield (2) is provided with a fixed shield air inlet (18), and the fixed shield air inlet (18) and the sound-proof shield air inlet (16) are arranged in an aligned mode; the surfaces of the movable cover (1) opposite to the fixed cover (2) are provided with sound absorption and insulation modules (14); an air circulation channel is formed between the movable cover (1) and the fixed cover (2).
2. A noise reduction test apparatus for a centrifugal blower according to claim 1, wherein: a spacing adjusting bolt (8) is arranged between the movable cover (1) and the fixed cover (2); the movable cover (1) moves back and forth along the direction vertical to the surface of the fixed cover (2).
3. A noise reduction test apparatus for a centrifugal blower according to claim 1, wherein: and a side plate handle (6) is arranged on the side plate (5).
4. A noise reduction test apparatus for a centrifugal blower according to claim 1, wherein: and the bottom plate (31) is provided with a forklift hole (7).
5. A noise reduction test apparatus for a centrifugal blower according to claim 1, wherein: the bottom of the side plate (5) on the front surface of the frame (4) is provided with a wire inlet (19).
6. A noise reduction test apparatus for a centrifugal blower according to claim 1, wherein: and a movable cover fastening screw (17) is arranged between the movable cover (1) and the fixed cover (2).
7. A noise reduction test apparatus for a centrifugal blower according to claim 1, wherein: the inner surface of the top cover (3), the inner surface of the bottom plate (31) and the inner surface of the side plate (5) are provided with punching plates fixedly connected through screws, and the sound absorption and insulation module (14) is arranged on the punching plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911267528.4A CN111022379A (en) | 2019-12-11 | 2019-12-11 | Noise reduction test device for centrifugal blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911267528.4A CN111022379A (en) | 2019-12-11 | 2019-12-11 | Noise reduction test device for centrifugal blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111022379A true CN111022379A (en) | 2020-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911267528.4A Pending CN111022379A (en) | 2019-12-11 | 2019-12-11 | Noise reduction test device for centrifugal blower |
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| Country | Link |
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| CN (1) | CN111022379A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049208A (en) * | 2021-04-07 | 2021-06-29 | 上海应用技术大学 | Analog noise absorbing device |
| CN117847000A (en) * | 2024-03-07 | 2024-04-09 | 山东省东澎冷暖工程有限公司 | Fan operation noise detection device |
-
2019
- 2019-12-11 CN CN201911267528.4A patent/CN111022379A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049208A (en) * | 2021-04-07 | 2021-06-29 | 上海应用技术大学 | Analog noise absorbing device |
| CN113049208B (en) * | 2021-04-07 | 2023-09-15 | 上海应用技术大学 | Analog noise absorbing device |
| CN117847000A (en) * | 2024-03-07 | 2024-04-09 | 山东省东澎冷暖工程有限公司 | Fan operation noise detection device |
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