CN111795012A - Air inlet silencing device and air blower - Google Patents
Air inlet silencing device and air blower Download PDFInfo
- Publication number
- CN111795012A CN111795012A CN202010791623.0A CN202010791623A CN111795012A CN 111795012 A CN111795012 A CN 111795012A CN 202010791623 A CN202010791623 A CN 202010791623A CN 111795012 A CN111795012 A CN 111795012A
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- sound
- absorbing
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- shell
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/403—Casings; Connections of working fluid especially adapted for elastic fluid pumps
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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 relates to the technical field of air intake silencing, and discloses an air intake silencing device and an air blower, wherein the air intake silencing device comprises: a housing provided with an air inlet and an air outlet; a plurality of louvers arranged at the air inlet at intervals; at least two sound absorbing baffles are arranged in the shell at intervals along the airflow direction, the roots of the sound absorbing baffles are respectively fixedly connected with the opposite inner walls of the shell, and the free ends of the sound absorbing baffles are respectively spaced from the opposite inner walls of the shell. The louver can absorb the noise generated by partial air flow when the air enters the shell; adjacent two sound-absorbing baffles are arranged like this to enable air to circulate in a zigzag manner in the shell, and when the air impacts the sound-absorbing baffles, the sound-absorbing baffles can absorb noise of air flowing in the shell. The shutter and the sound-absorbing baffle are matched to absorb most of noise in air intake, so that the requirement of the air blower for low noise can be met.
Description
Technical Field
The invention relates to the technical field of air intake silencing, in particular to an air intake silencing device and an air blower.
Background
The magnetic suspension blower is a mechanical device for conveying gas, and adopts core technologies such as a magnetic suspension bearing, a three-dimensional flow impeller, a high-speed permanent magnet synchronous motor, a high-efficiency frequency converter speed regulation, intelligent monitoring control and the like, when the magnetic suspension blower is started, the magnetic suspension blower is suspended firstly and then rotates, no friction and no lubrication are needed, the three-dimensional flow impeller and a rotor are directly connected, and zero transmission loss is realized. Is a high-tech green energy-saving environment-friendly product.
The magnetic suspension air blower adopts a magnetic suspension bearing without contact and mechanical friction and a high-speed high-power permanent magnet synchronous motor to directly drive the high-efficiency fluid impeller, overcomes the defects of the traditional air blower and the air suspension air blower, has the advantages of high efficiency, low noise, less faults, no need of a lubricating system and the like, and can still enable a rotor rotating at a high speed to be safely stopped by depending on a protection bearing in the system even if the magnetic suspension bearing breaks down, so that the equipment cannot be seriously damaged.
However, the intake air amount is relatively large, and large noise is likely to be generated in the intake port. The general practice is to arrange a louver at the air inlet, and although the louver can play a certain noise reduction effect, the louver still cannot meet the requirement of the current blower for noise.
Therefore, an intake silencer and a blower are needed to solve the above problems.
Disclosure of Invention
The invention aims to provide an air inlet silencing device and an air blower, wherein a louver is matched with a sound absorption baffle plate to absorb most of noise during air inlet, and the requirement of the air blower on low noise can be met.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, an intake silencer device is provided, including:
a housing provided with an air inlet and an air outlet;
a plurality of louvers arranged at the air inlet at intervals;
at least two sound absorbing baffles are arranged in the shell at intervals along the airflow direction, the roots of the sound absorbing baffles are respectively fixedly connected with the opposite inner walls of the shell, and the free ends of the sound absorbing baffles are respectively spaced from the opposite inner walls of the shell.
As an air intake silencer's preferred technical scheme, still including inhaling the sound welt, the laminating has on the inner wall of casing inhale the sound welt.
As a preferable technical scheme of the air inlet silencer, the cross section of each louver is V-shaped, and the spacing distance between the tops of every two adjacent louvers is smaller than the height of each louver.
In a preferred embodiment of the intake silencer, the sound-absorbing baffles are adjacent to each other, and the dimension of the space formed between the free end of one sound-absorbing baffle and the inner wall of the casing is the same as the dimension of the space formed between the free end of the other sound-absorbing baffle and the inner wall of the casing.
As a preferable technical solution of the intake silencer, a distance between two adjacent sound-absorbing baffles is greater than a spacing distance between a free end of the sound-absorbing baffle and an inner wall of the casing.
As an air intake silencer's preferred technical scheme, inhale the sound baffle including range upon range of two-layer abatvoix that sets up, the abatvoix is including the cotton layer of glass, glass silk cloth layer and the pore plate layer that stacks gradually the abatvoix the cotton layer of glass laminates mutually, be provided with a plurality of sound absorption hole on the pore plate layer.
As an air inlet silencer's preferred technical scheme, inhale the sound baffle and include the cotton layer of glass, set up and be in the glass silk cloth layer of the cotton layer both sides of glass and set up and be in the glass silk cloth layer is kept away from the holed plate layer of the cotton layer one side of glass, be provided with a plurality of on the holed plate layer and inhale the sound hole.
As an air inlet silencer's preferred technical scheme, inhale the sound welt including the cotton layer of glass, glass silk cloth layer and the perforated plate layer that stacks gradually the setting, be provided with a plurality of on the perforated plate layer and inhale the sound hole.
As an air inlet silencer's preferred technical scheme, the tripe is including the cotton layer of glass, glass silk cloth layer and the hole plate layer that stacks gradually the setting, be provided with a plurality of on the hole plate layer and inhale the sound hole, the tip and the edge of tripe all coat and have the reinforcing plate.
In a second aspect, a blower is provided that includes an intake silencer device as described above.
The invention has the beneficial effects that:
the louver can absorb the noise generated by partial air flow when the air enters the shell; the root of two adjacent sound-absorbing baffles is respectively fixedly connected with the relative inner wall of the shell, and the free ends of the two adjacent sound-absorbing baffles are respectively spaced from the relative inner wall of the shell, so that air circulates in a zigzag manner in the shell, and when the sound-absorbing baffles are impacted by air, the sound-absorbing baffles can absorb the noise of the air flowing in the shell. The shutter and the sound-absorbing baffle are matched to absorb most of noise in air intake, so that the requirement of the air blower for low noise can be met.
Drawings
Fig. 1 is a schematic structural diagram of an intake silencer according to the present invention.
In the figure: 1. a housing; 11. an air inlet; 12. an exhaust port; 2. louver blades; 3. a sound absorbing baffle; 4. sound absorption welt.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements to be referred to must have specific orientations, be constructed in specific orientations, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. 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 also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The present embodiment discloses a blower including a blower body and an intake silencer provided on the blower body, as shown in fig. 1, the intake silencer includes a housing 1, a plurality of sound-absorbing baffles 3, and at least two sound-absorbing baffles.
The casing 1 is formed with the air chamber, is provided with air inlet 11 and gas vent 12 on the casing 1, and the two is linked together with the air chamber, and wherein gas vent 12 is connected in the intake pipe of blower body. The air inlet 11 is provided with a filter member for filtering air entering the casing 1, so that excessive dust in the air is prevented from entering the blower body, and the cleanliness in the blower body can be effectively maintained.
A plurality of louvers 2 are arranged side by side on the air inlet 11 2, and two adjacent louvers 2 are arranged at intervals. The cross-sectional shape of the louver 2 is "V" type, and the distance between the tops of two adjacent louvers 2 is less than the height of the louver 2, so that the air must impact the surface of the louver 2 before being reflected to enter the air chamber of the housing 1. Specifically, the spacing distance between adjacent louvers 2 in the present embodiment is less than 50 mm. The louver 2 comprises a glass wool layer, a glass fiber cloth layer and a hole plate layer which are sequentially stacked, and a plurality of sound absorption holes are formed in the hole plate layer. The sound absorbing holes are used for absorbing noise during air inlet, so that the noise enters the glass fiber cloth layer and the glass wool layer through the sound absorbing holes to be absorbed. The ends and edges of the louver 2 are coated with reinforcing plates which are thin steel plates, and the purpose of the reinforcing plates is to increase the structural strength of the louver 2 and enable the louver 2 to withstand the impact of air.
At least two sound absorbing baffles 3 are arranged in the shell 1 at intervals, the two sides of each sound absorbing baffle 3 are fixedly connected with the inner wall of the shell 1, the roots of two adjacent sound absorbing baffles 3 are fixedly connected with the relative inner wall of the shell 1 respectively, and the free ends of two adjacent sound absorbing baffles 3 are spaced from the relative inner wall of the shell 1 respectively. Two adjacent sound baffles 2 that inhale promptly, one of them sound baffle 3's root and the inner wall fixed connection of casing 1 inhale sound baffle 3's free end and this inner wall interval of casing 1 set up in order to form the interval, supply the circulation of air. Preferably, the number of the sound-absorbing baffles 3 in the present embodiment is two.
The size of the space formed between the free end of one sound-absorbing baffle 3 and the inner wall of the shell 1 is the same as the size of the space formed between the free end of the other sound-absorbing baffle 3 and the inner wall of the shell 1. The distance between two adjacent sound-absorbing baffles 3 is greater than the spacing distance between the free ends of the sound-absorbing baffles 3 and the inner wall of the casing 1. This arrangement makes it possible to prevent air from flowing directly from the air inlet 11 to the air outlet 12 in the direction of the housing 1, and after having to hit the sound-absorbing baffle 3 and the inner wall of the housing 1, the air flows from the chamber between the air inlet 11 and the upstream sound-absorbing baffle 3 to the chamber between the adjacent two sound-absorbing baffles 3, then flows to the chamber between the air outlet 12 and the sound-absorbing baffle 3, and then flows out from the air outlet 12. The air may impact the sound-absorbing baffle 3 and the inner wall of the housing 1 during the flowing process, and the sound-absorbing baffle 3 may absorb the noise during the flowing process of the air.
Preferably, in this embodiment, sound absorbing baffle 3 includes the two-layer sound absorbing board that stacks up the setting, and the sound absorbing board includes the cotton layer of glass, glass silk cloth layer and the hole sheet layer that stacks up the setting in proper order, and the laminating of glass silk cloth layer is on the cotton layer of glass, and the laminating of hole sheet layer is on the glass silk cloth layer. The glass wool layers of the two sound-absorbing plates are attached to each other, and are particularly attached together in a bonding mode. The hole plate layer is provided with a plurality of sound absorbing holes, and the sound absorbing holes are used for absorbing noise of the air of the impact sound absorbing baffle 3, so that the noise enters the glass fiber cloth layer and the glass wool layer through the sound absorbing holes and is absorbed.
In other embodiments, the sound-absorbing baffle 3 comprises a glass wool layer, glass fiber cloth layers arranged on two sides of the glass wool layer, and a perforated plate layer arranged on one side of the glass fiber cloth layer far away from the glass wool layer, wherein a plurality of sound-absorbing holes are arranged on the perforated plate layer. The sound absorbing holes are used for absorbing the noise of the air impacting the sound absorbing baffle 3, so that the noise enters the glass fiber cloth layer and the glass wool layer through the sound absorbing holes to be absorbed.
Preferably, the air inlet silencer further comprises a sound-absorbing lining plate 4, and the sound-absorbing lining plate 4 is attached to the inner wall of the shell 1. Inhale sound welt 4 including the cotton layer of glass, glass fiber cloth layer and the perforated plate layer that stacks gradually the setting, the cotton layer laminating of glass is fixed on the inner wall of casing 1 specifically through the mode that bonds on the inner wall of casing 1. The perforated plate layer is provided with a plurality of sound absorbing holes. The sound absorbing holes are used for absorbing the noise of air impacting the inner wall of the shell 1, so that the noise enters the glass fiber cloth layer and the glass wool layer through the sound absorbing holes to be absorbed.
The louvers 2 can absorb noise generated by partial air flow when air enters the housing 1; the free end of two adjacent sound absorbing baffle plates 3 forms the interval with the relative inner wall of the shell 1 respectively, so that the air circulates in the zigzag mode in the shell 1, and when the air impacts the sound absorbing baffle plates 3, the sound absorbing baffle plates 3 can absorb the noise of the air flowing in the shell 1. The shutter 2 and the sound-absorbing baffle 3 are matched to absorb most of noise in air intake, and the requirement of the air blower for low noise can be met.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. An intake silencer assembly, comprising:
a housing (1) provided with an air inlet (11) and an air outlet (12);
a plurality of louvers (2) provided at intervals at the air inlet (11);
at least two sound absorbing baffles (3) are arranged in the shell (1) at intervals along the airflow direction, the roots of the sound absorbing baffles (3) are fixedly connected with the opposite inner walls of the shell (1) respectively, and the free ends of the sound absorbing baffles (3) are spaced from the opposite inner walls of the shell (1) respectively.
2. The intake silencer of claim 1, further comprising a sound absorbing liner (4), wherein the sound absorbing liner (4) is attached to the inner wall of the casing (1).
3. The intake silencer device according to claim 1, wherein the cross-sectional shape of the louvers (2) is "V" shaped, and the distance between the tops of two adjacent louvers (2) is less than the height of the louvers (2).
4. The intake silencer according to claim 1, wherein the sound-absorbing baffles (3) are adjacent to each other, and the size of the space formed between the free end of one sound-absorbing baffle (3) and the inner wall of the casing (1) is the same as the size of the space formed between the free end of the other sound-absorbing baffle (3) and the inner wall of the casing (1).
5. The intake silencer according to claim 4, wherein the distance between two adjacent sound-absorbing baffles (3) is greater than the distance between the free ends of the sound-absorbing baffles (3) and the inner wall of the casing (1).
6. The intake silencer according to claim 1, wherein the sound-absorbing baffle (3) comprises two sound-absorbing boards which are stacked, the sound-absorbing boards comprise a glass wool layer, a glass silk cloth layer and a perforated board layer which are stacked in sequence, the glass wool layers of the two sound-absorbing boards are attached to each other, and a plurality of sound-absorbing holes are formed in the perforated board layer.
7. The intake silencer of claim 1, wherein the sound-absorbing baffle (3) comprises a glass wool layer, glass fiber cloth layers arranged on two sides of the glass wool layer, and a perforated plate layer arranged on one side of the glass fiber cloth layers, which is far away from the glass wool layer, wherein the perforated plate layer is provided with a plurality of sound-absorbing holes.
8. The intake silencer of claim 2, wherein the sound-absorbing liner (4) comprises a glass wool layer, a glass fiber cloth layer and a perforated plate layer which are sequentially stacked, and the perforated plate layer is provided with a plurality of sound-absorbing holes.
9. The intake silencer of claim 1, wherein the louver (2) comprises a glass wool layer, a glass fiber cloth layer and a hole plate layer which are sequentially stacked, a plurality of sound absorption holes are formed in the hole plate layer, and reinforcing plates are wrapped at the end and the edge of the louver (2).
10. A blower comprising an intake silencer assembly as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010791623.0A CN111795012A (en) | 2020-08-07 | 2020-08-07 | Air inlet silencing device and air blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010791623.0A CN111795012A (en) | 2020-08-07 | 2020-08-07 | Air inlet silencing device and air blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111795012A true CN111795012A (en) | 2020-10-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010791623.0A Pending CN111795012A (en) | 2020-08-07 | 2020-08-07 | Air inlet silencing device and air blower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111795012A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483473A (en) * | 2020-12-03 | 2021-03-12 | 中山市华南理工大学现代产业技术研究院 | Low-noise air blower |
| CN113049208A (en) * | 2021-04-07 | 2021-06-29 | 上海应用技术大学 | Analog noise absorbing device |
| CN113280007A (en) * | 2021-05-27 | 2021-08-20 | 中车大连机车研究所有限公司 | Narrow-distance sound-absorbing insulator for magnetic suspension air blower |
-
2020
- 2020-08-07 CN CN202010791623.0A patent/CN111795012A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483473A (en) * | 2020-12-03 | 2021-03-12 | 中山市华南理工大学现代产业技术研究院 | Low-noise air blower |
| 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 |
| CN113280007A (en) * | 2021-05-27 | 2021-08-20 | 中车大连机车研究所有限公司 | Narrow-distance sound-absorbing insulator for magnetic suspension air blower |
| CN113280007B (en) * | 2021-05-27 | 2024-06-07 | 中车大连机车研究所有限公司 | Narrow-distance sound eliminating and insulating device for magnetic suspension blower |
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