CN113280007A - Narrow-distance sound-absorbing insulator for magnetic suspension air blower - Google Patents
Narrow-distance sound-absorbing insulator for magnetic suspension air blower Download PDFInfo
- Publication number
- CN113280007A CN113280007A CN202110606801.2A CN202110606801A CN113280007A CN 113280007 A CN113280007 A CN 113280007A CN 202110606801 A CN202110606801 A CN 202110606801A CN 113280007 A CN113280007 A CN 113280007A
- Authority
- CN
- China
- Prior art keywords
- sound
- silencing
- plate
- absorbing
- sound insulation
- Prior art date
- 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.)
- Granted
Links
- 239000012212 insulator Substances 0.000 title claims abstract description 13
- 239000000725 suspension Substances 0.000 title abstract description 16
- 230000030279 gene silencing Effects 0.000 claims abstract description 88
- 238000009413 insulation Methods 0.000 claims abstract description 77
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 229920000742 Cotton Polymers 0.000 claims description 64
- 238000010521 absorption reaction Methods 0.000 claims description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 238000009434 installation Methods 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 14
- 238000005339 levitation Methods 0.000 claims description 10
- 230000008030 elimination Effects 0.000 claims description 5
- 238000003379 elimination reaction Methods 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 2
- 238000013016 damping Methods 0.000 claims 8
- 239000006098 acoustic absorber Substances 0.000 claims 1
- 230000003584 silencer Effects 0.000 abstract description 9
- 230000001743 silencing effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 9
- 210000003195 fascia Anatomy 0.000 description 4
- 238000004904 shortening Methods 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a narrow-distance sound-absorbing insulator for a magnetic suspension air blower, which comprises a first sound-absorbing plate, a second sound-absorbing plate, sound-absorbing plates and sound-absorbing strips, wherein the first sound-absorbing plate is arranged on the first side of the sound-absorbing plate; the first silencing plate and the second silencing plate are identical in structure and are arranged in parallel with a gap in the middle; the sound insulation plate is axially parallel to the first sound insulation plate and the second sound insulation plate, and a gas flow passage for air intake of the sound insulation device is formed between the sound insulation plates; the baffle lateral boundary is smaller than the lateral boundaries where the first baffle and the second baffle are placed in parallel; at least two silencing strips are respectively arranged between the sound insulation plate and the first silencing plate and between the sound insulation plate and the second silencing plate, a silencing channel is formed between every two adjacent silencing strips, one side of the silencing channel is communicated with the gas flow channel, and the other side of the silencing channel is a gas outlet used for discharging gas entering the silencing channel into the air blower. The invention changes the original direct axial air intake into transverse air intake along the silencer channel, increases the silencing length of the air intake through the transverse silencing passage, improves the silencing effect, and greatly shortens the axial size of the silencer.
Description
Technical Field
The invention relates to the field of magnetic suspension air blowers, in particular to a narrow-distance sound-absorbing insulator for a magnetic suspension air blower.
Background
A magnetic suspension blower belongs to rotary machinery. The impeller rotates at high speed, and strong high-frequency pneumatic noise is generated. The noise of the blower at the rated point is substantially above 100db (a), and some even up to 110db (a) or higher. The magnetic suspension blower is generally used in the sewage treatment industry, is installed indoors, and has the integral noise requirement lower than 85dB (A).
The magnetic suspension blower is generally integrated with an electric control part in a box body. One side of the box body is provided with an air outlet which is externally connected with an exhaust pipeline. The compressed gas is discharged to the water through an exhaust pipeline and is used for aeration of the biochemical pool. Since the magnetic suspension blower needs to continuously suck air, an air inlet is arranged on the box body. In order to reduce the overall noise, sound-absorbing cotton can be arranged in the box body. However, because air needs to be fed, the box body cannot be completely sealed, and according to the characteristic of sound transmission, high-frequency noise of the impeller can be transmitted to the periphery through the air inlet. To achieve a good noise reduction effect, the air inlet must be specially treated. Because the original noise of the blower is large, the conventional silencer has too large axial size and cannot be installed inside the box body.
Disclosure of Invention
The invention provides a narrow-distance sound-absorbing insulator for a magnetic suspension blower, which aims to solve the problem that the conventional silencer is too large in axial size and cannot be installed in a box body.
In order to achieve the purpose, the technical scheme of the invention is as follows: a narrow-pitch noise suppressor for a magnetically levitated blower, comprising: the first sound-absorbing plate, the second sound-absorbing plate, the sound-absorbing plate and the sound-absorbing strips;
the first silencing plate and the second silencing plate are identical in structure;
the first sound-absorbing plate and the second sound-absorbing plate are arranged in parallel, and a distance is reserved between the first sound-absorbing plate and the second sound-absorbing plate;
the sound insulation plate is parallel to the first sound insulation plate and the second sound insulation plate in the axial direction, and a gas flow passage for air intake of the sound insulation device is formed between the sound insulation plate and the first sound insulation plate and between the sound insulation plate and the second sound insulation plate;
the boundaries of the two sides of the sound insulation board are smaller than the boundaries of the two sides of the first sound insulation board and the second sound insulation board which are arranged in parallel;
at least two silencing strips are arranged between the sound insulation board and the first silencing board or between the sound insulation board and the second silencing board, a silencing channel is formed between every two adjacent silencing strips and the first silencing board or between the second silencing board and the sound insulation board, one side of the silencing channel is communicated with the gas flow channel, and the other side of the silencing channel is a gas outlet used for discharging gas entering the silencing channel into the air blower.
Further, the first acoustical panel comprises a first front fascia, at least one set of first sound absorbing cotton, and a first rear fascia, the first sound absorbing cotton being located between the first front fascia and the first rear fascia.
Further, the cross-sectional dimension of the silencing passage is calculated according to the formula:
v＝Q/(2m*a*b)；
f＝1258/(a+b)；
Li＝2Φ(αi)(a+b)c/(a*b)；
wherein a is the width of the silencing channel, b is the height of the silencing channel, c is the length of the silencing channel, v is the wind speed in the silencing channel, Q is the rated wind quantity of the blower, m is the number of silencing strips, f is the cut-off frequency of the silencing channel, and LiFor the sound-deadening volume of each acoustic frequency band of the sound-deadening channel, phi (alpha)i) The noise elimination coefficient of the sound absorption cotton under different frequency bands is shown.
Furthermore, the first sound absorption cotton is provided with two groups, and a baffle for separating the two groups of the first sound absorption cotton is transversely arranged in the middle of the first rear protective panel.
Further, the acoustic celotex board includes that the second is preceding the armor plate, at least a set of second inhales sound cotton, steel sheet, at least a set of third and inhales sound cotton and second back armor plate, the second inhales the sound cotton and is located the armor plate before the second with between the steel sheet, the third inhales the sound cotton and is located the steel sheet with between the second back armor plate.
Further, the sound cotton is inhaled to the second and the sound cotton is inhaled to the third has two sets ofly respectively, the steel sheet both sides set up and are used for inhaling the sound cotton and two sets of with two sets of seconds the sound cotton vertical parting bead that separates is inhaled to the third.
Further, the sound-absorbing strip comprises at least one fourth sound-absorbing cotton, an installation net and an installation net, wherein the fourth sound-absorbing cotton is placed on the installation net plate, and the installation net plate is arranged around the installation net.
Further, still include closing plate, joint strip and at least one mounting panel, first front panel lateral surface sets up the closing plate, the closing plate is used for installing joint strip, the acoustic celotex board both ends are arranged in to the mounting panel.
Furthermore, a sound insulation pad is arranged between the steel plate and the second sound absorption cotton and between the steel plate and the third sound absorption cotton.
Further, the silencing bar is a linear silencing bar or a curved silencing bar.
Has the advantages that: the invention designs a narrow-distance sound-absorbing and sound-insulating device with sound absorption, sound insulation and sound attenuation functions aiming at an air inlet of a magnetic suspension air blower. The invention changes the original direct axial air intake into air intake along the silencer channel, and changes the original longer axial silencing size into the transverse silencing size, thereby increasing the length of the silencing passage, improving the silencing effect, and simultaneously greatly shortening the axial size of the silencer. Therefore, the noise elimination and insulation device has short axial dimension, can be flexibly placed in the box body close to the air inlet side and sealed with the side wall of the box body, so that the box body of the air blower achieves the effect of approximate sealing and sound insulation, the whole noise is reduced by 30-40dB (A), and the whole noise of the magnetic suspension air blower is reduced to be lower than 80dB (A).
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic view of the backside structure of the present invention;
FIG. 3 is a schematic structural view of the acoustical panel of the present invention;
FIG. 4 is a schematic structural view of a sealing rubber strip of the present invention;
FIG. 5 is a schematic view of the baffle structure of the present invention;
FIG. 6 is a schematic view of a muffler passage configuration according to the present invention;
fig. 7 is a schematic view of the direction of the air flow of the present invention.
The sound insulation board comprises, by weight, 1, a first sound insulation board, 2, a mounting board, 3, a sealing rubber strip, 4, a second sound insulation board, 5, a sound insulation board, 6, a sound insulation strip, 7, a gas flow channel, 8, a sound insulation channel, 9, a baffle, 10, a division strip, 1-1, a first front protection panel, 1-2, first sound absorption cotton, 1-3, a first rear protection panel, 1-1-1, a sealing board, 5-1, a second front protection panel, 5-2-1, second sound absorption cotton, 5-2-2, third sound absorption cotton, 5-3, a steel plate, 5-4, a second rear protection panel, 6-1, fourth sound absorption cotton, 6-2, a mounting net, 6-3 and a mounting net board.
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. 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.
The present embodiment provides a narrow-pitch noise damper for a magnetic levitation blower, as shown in fig. 1-7, comprising: the first sound-absorbing panel 1, the second sound-absorbing panel 4, the sound-absorbing panel 5 and the sound-absorbing strips 6;
the first sound-absorbing plate 1 and the second sound-absorbing plate 4 are identical in structure;
the first sound-absorbing plate 1 and the second sound-absorbing plate 4 are arranged in parallel, and a gap is reserved between the first sound-absorbing plate 1 and the second sound-absorbing plate 4;
the sound insulation plate 5 is parallel to the first sound insulation plate 1 and the second sound insulation plate 4 in the axial direction, and a gas flow passage 7 for air intake of the sound insulation device is formed between the sound insulation plate 5 and the first sound insulation plate 1 and the second sound insulation plate 4;
the boundaries of two sides of the sound insulation board 5 are smaller than the boundaries of two sides of the first sound insulation board 1 and the second sound insulation board 4 which are arranged in parallel;
at least two silencing strips 6 are arranged between the sound insulation board 5 and the first silencing board 1 and the second silencing board 4, silencing passages 8 are formed between the two adjacent silencing strips 6 and the first silencing board 1 or between the second silencing board 4 and the sound insulation board 5, one side of each silencing passage 8 is communicated with the gas flow passage 7, and the other side of each silencing passage 8 is a gas outlet used for discharging gas entering the silencing passage 8 into the air blower.
As shown in fig. 5, the width d of the gas flow channel is greater than or equal to 2 times of the distance e between the baffle and the side plate of the blower case, and the preferable range of the distance e between the baffle and the side plate of the blower case is 60-150 mm. The invention designs a narrow-distance sound-absorbing and sound-insulating device with sound absorption, sound insulation and sound attenuation functions aiming at an air inlet of a magnetic suspension air blower. The invention changes the original direct axial air intake into air intake along the silencer channel, and changes the original longer axial silencing size into the transverse silencing size, thereby increasing the length of the silencing passage, improving the silencing effect, and simultaneously greatly shortening the axial size of the silencer. Therefore, the noise elimination and insulation device has short axial dimension, can be flexibly placed in the box body close to the air inlet side and sealed with the side wall of the box body, so that the box body of the air blower achieves the effect of approximate sealing and sound insulation, the whole noise is reduced by 30-40dB (A), and the whole noise of the magnetic suspension air blower is reduced to be lower than 80dB (A).
In a specific embodiment, the first sound-absorbing plate 1 comprises a first front panel 1-1, at least one set of first sound-absorbing cotton 1-2 and a first rear panel 1-3, the first sound-absorbing cotton 1-2 is located between the first front panel 1-1 and the first rear panel 1-3, a sealing plate 1-1-1 is arranged on the outer side of the first front panel 1-1, and the sealing plate 1-1-1 is used for installing the sealing rubber strip 3, so that the sealing of the side of the sound-absorbing device and the installation box body is realized. The thickness of the first sound-absorbing cotton 1-2 is selected according to the acoustic characteristics of the blower itself, and is preferably 40-60 mm. Referring to fig. 7, two acoustical panels are placed in parallel with a spacing d in between. The distance d is more than or equal to 2e, e is the distance between the end face of the sound insulation board 5 and the side plate of the box body, and the optimal value range of e is preferably 60-150 mm. Inhale the sound cotton according to the difference of fan acoustic characteristic, can adopt the combination to inhale the sound cotton to further the reinforcing gives sound insulation, inhales the sound effect.
In a specific embodiment, the first sound-absorbing cotton 1-2 has two groups, and the baffle 9 for separating the two groups of the first sound-absorbing cotton 1-2 is transversely arranged in the middle of the first back guard plate 1-3.
In a specific embodiment, the sound insulation board 5 comprises a second front panel 5-1, at least one set of second sound-absorbing cotton 5-2-1, a steel plate 5-3, at least one set of third sound-absorbing cotton 5-2-2 and a second rear panel 5-4, wherein the second sound-absorbing cotton 5-2-1 is located between the second front panel 5-1 and the steel plate 5-3, and the third sound-absorbing cotton 5-2-2 is located between the steel plate 5-3 and the second rear panel 5-4. The thicknesses of the second sound-absorbing cotton 5-2-1 and the third sound-absorbing cotton 5-2-2 are selected according to the acoustic characteristics of the blower itself, and preferably 40-60 mm, and 3 mm. The sound insulation board 5 plays three roles in the device, firstly, the sound insulation board and the sound insulation strips in front form a multi-column square-shaped sound insulation channel, secondly, the sound insulation board utilizes the excellent sound insulation characteristic of the steel plate to play a good sound insulation effect, and thirdly, the sound insulation cotton behind the steel plate forms a space sound absorber to play a sound absorption effect. In order to improve the sound insulation and vibration resistance, a layer of sound insulation pad can be added between the steel plate and the sound absorption cotton.
In a specific embodiment, the second sound-absorbing cotton 5-2-1 and the third sound-absorbing cotton 5-2-2 have two sets, and the steel plate 5-3 is provided with longitudinal division bars 10 at two sides for separating the two sets of the second sound-absorbing cotton 5-2-1 and the two sets of the third sound-absorbing cotton 5-2-2.
In a specific embodiment, the sound-absorbing strip 6 comprises at least one fourth sound-absorbing cotton 6-1, an installation screen 6-2 and an installation screen 6-3, wherein the fourth sound-absorbing cotton 6-1 is placed on the installation screen 6-3, and the installation screen 6-3 is placed around the installation screen 6-2. The silencing strip 6 is a linear silencing strip or a curved silencing strip. Referring to fig. 6, the width a of the silencing bar is the distance between the silencing plate and the sound insulating plate, the shortest length c of the silencing bar cancels the horizontal overlapping dimension of the sound insulating plate and the sound insulating plate, and the distance between the silencing bars is b. The thickness t of the sound-absorbing cotton in the sound-deadening strip 6 is preferably 40 to 60 mm. The calculation formula of the number m of the silencing bars 6 is as follows: and m is h/(b + t), wherein h is the height of the sound-absorbing plate, and the value of m is rounded off to obtain an integer. The silencing plates, the sound insulation plates and the silencing strips are enclosed into a plurality of silencing passages 8 with the cross section dimension of ab and the length of c, and the cross sections of the silencing passages 8 are square, which is shown in detail in figure 5. The sectional size and the length of the silencing passage are different, and the corresponding air inlet speed, the cut-off frequency and the silencing volume are different. In order to achieve the silencing effect of at least 30dB (A) -40dB (A) of the silencing passage 8, the cross-sectional dimension of the silencing passage 8 should satisfy the following equation:
the wind speed v in the silencing passage 8 is Q/(2m a b)<15m/s, Q is rated air quantity of the blower, and unit m3S; cut-off frequency f of silencing channel 8 is 1258/(a + b)>2k n, wherein k is the number of the blades (including long blades and short blades) of the blower, and n is the rated rotating speed of the blower; silencing volume L of each acoustic frequency band of silencing channel 8i＝2Φ(αi)(a+b)c/(a*b)>30dB (A), in dB (A). Phi (. alpha.) (alpha)i) In order to achieve the noise elimination coefficient of the sound absorption cotton under different frequency bands, the range of 1.3-1.5 can be normally selected. Wherein a is the width of amortization passageway, b is the height of amortization passageway, and c is the length of amortization passageway, if the volume of eliminating sound reaches the not requirement, can increase the length of c with amortization strip by linear type conversion curved line type to reach required effect.
In the specific embodiment, the magnetic suspension air blower further comprises at least one mounting plate 2, wherein the mounting plate 2 is arranged at two ends of the sound insulation plate 5, and the mounting plate 2 is used for mounting the narrow-pitch sound insulation absorber in the magnetic suspension air blower box body.
In a specific embodiment, a sound insulation pad is arranged between the steel plate 5-3 and the second sound absorption cotton 5-2-1 and the third sound absorption cotton 5-2-2.
In a specific embodiment, the first front guard panel 1-1 and the second front guard panel 5-1 are perforated screens, and the opening rate of the screens is more than 40%.
As shown in FIG. 7, the acoustical panel is installed with the acoustical panel facing outward and the acoustical panel facing inward. The blower operates, and the box is inside to produce the negative pressure for outside air from gas flow path 7 to become two ways respectively, flow in the amortization passageway of left and right sides respectively, the noise of admitting air will carry out the first amortization in gas flow path 7, carries out the second amortization in the amortization passageway. And then out of the silencer to the blower inlet. The internal noise of the blower can be absorbed by the sound-absorbing material on the baffle plate, and the rest is isolated by the steel plate. The sound-absorbing boards and the sound-insulating boards are arranged in a staggered and overlapped mode, so that sound can be effectively prevented from being directly emitted from the sound-absorbing channel. Because the air current is walked from the amortization passageway of left and right sides, the route can become very much than directly becoming from the axial, so the effect that realizes shortening the muffler has originally changed the longer axial amortization size that needs into horizontal amortization size to increased the length of amortization route, improved the effect of amortization, still shortened the axial dimension of muffler simultaneously greatly. The invention can also place the sound insulation board inwards, the sound insulation board outwards, and the air flow enters the silencing passage through two sides and then flows out from the middle part.
In practical application, the narrow-pitch noise damper has a width of 1330 mm (the specific size can be adjusted according to the width size of the box body), a height of 2000 mm (comprising the mounting base and the connecting mounting plate, the axial size of which can be adjusted according to the height of the box body) and a thickness of 218 mm. Can be installed inside the blower and realize the set silencing volume, and the specific narrow-distance silencing and insulating device parameters are shown in the table 1.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A narrow-pitch noise suppressor for a magnetically levitated blower, comprising: the first sound-absorbing plate (1), the second sound-absorbing plate (4), the sound-absorbing plate (5) and the sound-absorbing strips (6);
the first sound-absorbing plate (1) and the second sound-absorbing plate (4) are identical in structure;
the first sound-absorbing plate (1) and the second sound-absorbing plate (4) are placed in parallel, and a distance is reserved between the first sound-absorbing plate (1) and the second sound-absorbing plate (4);
the acoustic panel (5) is axially parallel to the first and second acoustic panels (1, 4), and a gas flow channel (7) for acoustic absorber inlet gas is formed between the acoustic panel (5) and the first and second acoustic panels (1, 4);
the boundaries of two sides of the sound insulation board (5) are smaller than the boundaries of two sides of the first sound insulation board (1) and the second sound insulation board (4) which are arranged in parallel;
at least two silencing strips (6) are arranged between the sound insulation board (5) and the first sound insulation board (1) and the second sound insulation board (4), silencing passages (8) are formed between the two adjacent silencing strips (6) and the first sound insulation board (1) or the second sound insulation board (4) and the sound insulation board (5), one side of each silencing passage (8) is communicated with the gas flow channel (7), and the other side of each silencing passage is used for discharging gas entering the silencing passages (8) into a gas outlet of the air blower.
2. A narrow-pitch noise-damping insulator for a magnetic levitation blower as set forth in claim 1, wherein: the first sound-absorbing plate (1) comprises a first front panel (1-1), at least one group of first sound-absorbing cotton (1-2) and a first rear panel (1-3), and the first sound-absorbing cotton (1-2) is located between the first front panel (1-1) and the first rear panel (1-3).
3. A narrow-pitch noise damper for a magnetic levitation blower according to claim 2, wherein the sectional dimension of the noise reduction passage (8) is calculated by the formula:
v＝Q/(2m*a*b)；
f＝1258/(a+b)；
Li＝2Φ(αi)(a+b)c/(a*b)；
wherein a is the width of the silencing channel, b is the height of the silencing channel, c is the length of the silencing channel, v is the wind speed in the silencing channel, Q is the rated wind quantity of the blower, m is the number of silencing strips, f is the cut-off frequency of the silencing channel, and LiFor the sound-deadening volume of each acoustic frequency band of the sound-deadening channel, phi (alpha)i) The noise elimination coefficient of the sound absorption cotton under different frequency bands is shown.
4. A narrow-pitch noise-damping insulator for a magnetic levitation blower as set forth in claim 2, wherein: the first sound absorption cotton (1-2) is provided with two groups, and a baffle (9) used for separating the two groups of the first sound absorption cotton (1-2) is transversely arranged in the middle of the first rear protective panel (1-3).
5. A narrow-pitch noise-damping insulator for a magnetic levitation blower as set forth in claim 3, wherein: the acoustic celotex board (5) are inhaled cotton (5-2-1), steel sheet (5-3), at least a set of second including second preceding armor plate (5-1), at least a set of second and are inhaled cotton (5-2-2) and second back armor plate (5-4), the second is inhaled cotton (5-2-1) and is located second preceding armor plate (5-1) with between steel sheet (5-3), the third is inhaled cotton (5-2-2) and is located steel sheet (5-3) with between second back armor plate (5-4).
6. A narrow-pitch noise-damping insulator for a magnetic levitation blower as set forth in claim 4, wherein: the second sound absorption cotton (5-2-1) and the third sound absorption cotton (5-2-2) are respectively provided with two groups, and two sides of the steel plate (5-3) are provided with longitudinal parting strips (10) for separating the two groups of the second sound absorption cotton (5-2-1) and the two groups of the third sound absorption cotton (5-2-2).
7. A narrow-pitch noise-damping insulator for a magnetic levitation blower as set forth in claim 5, wherein: the sound-absorbing strip (6) comprises at least one fourth sound-absorbing cotton (6-1), an installation net (6-2) and an installation net plate (6-3), the fourth sound-absorbing cotton (6-1) is placed on the installation net plate (6-3), and the installation net plate (6-3) is placed around the installation net (6-2).
8. A narrow-pitch noise-damping insulator for a magnetic levitation blower as set forth in claim 1, wherein: the novel sound insulation board is characterized by further comprising a sealing plate (1-1-1), a sealing rubber strip (3) and at least one mounting plate (2), wherein the sealing plate (1-1-1) is arranged on the outer side face of the first front panel (1-1), the sealing plate (1-1-1) is used for mounting the sealing rubber strip (3), and the mounting plate (2) is arranged at two ends of the sound insulation board (5).
9. A narrow-pitch noise-damping insulator for a magnetic levitation blower as set forth in claim 6, wherein: and a sound insulation pad is arranged between the steel plate (5-3) and the second sound absorption cotton (5-2-1) and the third sound absorption cotton (5-2-2).
10. A narrow-pitch noise-damping insulator for a magnetic levitation blower as set forth in claim 1, wherein: the silencing strip (6) is a linear silencing strip or a curve silencing strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110606801.2A CN113280007B (en) | 2021-05-27 | 2021-05-27 | Narrow-distance sound eliminating and insulating device for magnetic suspension blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110606801.2A CN113280007B (en) | 2021-05-27 | 2021-05-27 | Narrow-distance sound eliminating and insulating device for magnetic suspension blower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113280007A true CN113280007A (en) | 2021-08-20 |
| CN113280007B CN113280007B (en) | 2024-06-07 |
Family
ID=77282907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110606801.2A Active CN113280007B (en) | 2021-05-27 | 2021-05-27 | Narrow-distance sound eliminating and insulating device for magnetic suspension blower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113280007B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114233692A (en) * | 2021-12-29 | 2022-03-25 | 中车大连机车研究所有限公司 | Emptying silencer of magnetic suspension air blower for sewage treatment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204003648U (en) * | 2014-08-11 | 2014-12-10 | 宜兴优纳特机械有限公司 | A kind of blower fan import baffler |
| CN104859674A (en) * | 2015-06-05 | 2015-08-26 | 南车青岛四方机车车辆股份有限公司 | Silencing air duct and railway vehicle |
| CN105332953A (en) * | 2014-08-11 | 2016-02-17 | 宜兴优纳特机械有限公司 | Silencer for draught fan inlet |
| CN109882451A (en) * | 2019-03-12 | 2019-06-14 | 亿昇(天津)科技有限公司 | A kind of silencing means of magnetic suspension air blower emptying |
| CN111795012A (en) * | 2020-08-07 | 2020-10-20 | 亿昇(天津)科技有限公司 | Air inlet silencing device and air blower |
| CN215633996U (en) * | 2021-05-27 | 2022-01-25 | 中车大连机车研究所有限公司 | Narrow-distance sound-absorbing insulator for magnetic suspension air blower |
-
2021
- 2021-05-27 CN CN202110606801.2A patent/CN113280007B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204003648U (en) * | 2014-08-11 | 2014-12-10 | 宜兴优纳特机械有限公司 | A kind of blower fan import baffler |
| CN105332953A (en) * | 2014-08-11 | 2016-02-17 | 宜兴优纳特机械有限公司 | Silencer for draught fan inlet |
| CN104859674A (en) * | 2015-06-05 | 2015-08-26 | 南车青岛四方机车车辆股份有限公司 | Silencing air duct and railway vehicle |
| CN109882451A (en) * | 2019-03-12 | 2019-06-14 | 亿昇(天津)科技有限公司 | A kind of silencing means of magnetic suspension air blower emptying |
| CN111795012A (en) * | 2020-08-07 | 2020-10-20 | 亿昇(天津)科技有限公司 | Air inlet silencing device and air blower |
| CN215633996U (en) * | 2021-05-27 | 2022-01-25 | 中车大连机车研究所有限公司 | Narrow-distance sound-absorbing insulator for magnetic suspension air blower |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114233692A (en) * | 2021-12-29 | 2022-03-25 | 中车大连机车研究所有限公司 | Emptying silencer of magnetic suspension air blower for sewage treatment |
| CN114233692B (en) * | 2021-12-29 | 2024-06-04 | 中车大连机车研究所有限公司 | A blowdown silencer for sewage treatment's magnetic suspension air-blower |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113280007B (en) | 2024-06-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6932188B2 (en) | Silencer for vacuum cleaner | |
| CN215633996U (en) | Narrow-distance sound-absorbing insulator for magnetic suspension air blower | |
| US1964845A (en) | Ventilator | |
| CN113280007A (en) | Narrow-distance sound-absorbing insulator for magnetic suspension air blower | |
| CN109340192B (en) | Fume exhaust fan | |
| CN210516212U (en) | Multi-stage throttling and voltage-reducing impedance composite silencer device | |
| CN104875764B (en) | A kind of noise elimination wind conduit and rail vehicle | |
| CN212615634U (en) | Low flow resistance tubular noise elimination room is arranged to big amount of wind tail | |
| CN207702017U (en) | A kind of ventilation shaft muffler | |
| CN109404345A (en) | A kind of air inlet noise-reducing structure of magnetic suspension blower | |
| CN111365215B (en) | Pneumatic silencer | |
| CN216948719U (en) | Double-layer sound insulation room | |
| CN211781878U (en) | Air conditioner fan pipeline silencer | |
| CN216044651U (en) | Mining local ventilator with micro-perforated plate combined type noise elimination and reduction structure | |
| CN114233692A (en) | Emptying silencer of magnetic suspension air blower for sewage treatment | |
| CN219413050U (en) | Noise reduction mechanism and waste discharge device | |
| CN114215707A (en) | Noise eliminator and wind generating set | |
| JP7558305B2 (en) | Sound suppressor | |
| CN219672945U (en) | Active noise reduction air inlet muffler | |
| CN215409449U (en) | Double-layer silencing sound-proof cover for fan | |
| CN113247229A (en) | Ventilation trap sheet type noise elimination device and installation method | |
| CN206131784U (en) | Labyrinth silencer | |
| CN101290019A (en) | Wedge structure inner aeration type sound-deadening sheet | |
| CN114517785B (en) | Roots blower sound insulation cover and Roots blower | |
| CN221054018U (en) | Muffler for noise reduction of cooling fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |