CN207349128U - A kind of low noise high-speed centrifugal fan - Google Patents
A kind of low noise high-speed centrifugal fan Download PDFInfo
- Publication number
- CN207349128U CN207349128U CN201721361465.5U CN201721361465U CN207349128U CN 207349128 U CN207349128 U CN 207349128U CN 201721361465 U CN201721361465 U CN 201721361465U CN 207349128 U CN207349128 U CN 207349128U
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- China
- Prior art keywords
- muffler plate
- centrifugal fan
- casing
- speed centrifugal
- low noise
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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
- F04D29/664—Sound attenuation by means of sound absorbing material
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A kind of low noise high-speed centrifugal fan, including casing, back shroud of impeller and motor are the utility model is related to, the back side panel one side of casing is covered with muffler plate I, and another side is covered with muffler plate II；There are gap between back shroud of impeller and the back side panel of casing and between back shroud of impeller for muffler plate I；Muffler plate II is connected with arc muffler plate III, and arc muffler plate III is sleeved on outside motor, and arc muffler plate III is semi-cylindrical shaped.The utility model not only reduces the aerodynamic noise in casing by installing muffler plate additional inside and outside casing, but also reduces the electromagnetic noise of motor, and overall noise reduction is obvious；Muffler plate is easy for installation, and the design of arc muffler plate not only has good noise reduction, but also does not influence the installation of motor base；It is simple in structure, it is easy to assembly, the transformation to existing centrifugal blower is also applied for, it is with good economic efficiency.
Description
Technical field
The utility model belongs to universal machine field of ventilation equipment, is related to a kind of low noise high-speed centrifugal fan.
Background technology
Centrifugal blower is the pressure energy and kinetic energy that gas is converted to using the rotating mechanical energy of draught fan impeller, and gas is defeated
See off, gas is rotated through impeller and produces air energy along the streamlined air inlet air inlet through hollow shaft of wind turbine, along screw type housing by gas
Body radially exports, then is sent out from shell air outlet.Centrifugal fan structure schematic diagram is as shown in Figure 1, its noise main source is wind
Machine rotates the electromagnetic noise of the aerodynamic noise brought and motor.
When centrifugal blower works, by driving motor moving blade, air is sucked vertically and radially excludes air, in work
Noise and vibration can be produced when making, particularly small-sized high speed centrifugal blower fan rotating speed is high, can generally reach 8000 turns, blower air
Kinetic noise is very big；And the electromagnetic noise of this high-speed electric expreess locomotive is equally very high, this noise can seriously affect the body of staff
Heart health.
Therefore, a kind of great realistic meaning of low noise high-speed centrifugal fan is developed.
Utility model content
The purpose of the utility model is to overcome prior art middle/high speed centrifugal fan noise it is big the defects of, there is provided a kind of low noise
Sound high-speed centrifugal fan.
To achieve the above object, the utility model is solved by the following technical programs：
A kind of low noise high-speed centrifugal fan, including casing, back shroud of impeller and motor, the back side panel one side of casing cover
There is muffler plate I, another side is covered with muffler plate II；
Muffler plate I, there are gap, disappears between back shroud of impeller and the back side panel of casing and between back shroud of impeller
Gap is left between sound plate I and back shroud of impeller, does not influence the rotation of impeller, muffler plate I is arranged in casing, mainly to
Absorb the aerodynamic noise reduced in casing；
Muffler plate II is connected with arc muffler plate III, and arc muffler plate III is sleeved on outside motor, and muffler plate II is eliminated the noise with arc
Plate III is installed on outside casing, and being mainly used for absorbing reduces noise of motor, and muffler plate III is arranged to arc rather than the cylinder of closing
Shape is the convenience for installation, and arc muffler plate III does not interfere with the installation of motor base, and the length of arc muffler plate III can root
It is adjusted according to actual needs, length is bigger, and noise reduction is better, and the present invention is by installing muffler plate additional to aerodynamic noise and motor
Noise is absorbed, and effectively reduces fan noise.
As preferable technical solution：
A kind of low noise high-speed centrifugal fan as described above, the muffler plate I, muffler plate II and arc muffler plate III
Internal filling glass cotton, the thickness of filler is identical or different, and the thickness of filler is 10~20mm, and filler thickness can basis
The actual size of aerodynamic noise and noise of motor is configured, when noise is larger, it is possible to increase the thickness of filler, filler are thicker
Cost can be influenced to a certain extent.
A kind of low noise high-speed centrifugal fan as described above, offers in the muffler plate I and muffler plate II logical respectively
Hole a and through hole b, the output shaft of motor sequentially pass through through hole b, the back side panel of casing and through hole a and are connected with back shroud of impeller.
A kind of low noise high-speed centrifugal fan as described above, the through hole a and through hole b are circular through hole, this practicality is new
The shape of through holes of type is not limited only to circle, or square, oval or semicircle.
A kind of low noise high-speed centrifugal fan as described above, the muffler plate I and muffler plate II are annular shape, described to disappear
The back side panel of casing is completely covered sound plate I, and the muffler plate II covers the back side panel part of casing, and casing is not completely covered
Back side panel be motor in order to facilitate the installation of.
A kind of low noise high-speed centrifugal fan as described above, the size in the gap are 4~6mm, the mistake of gap setting
It is small then more demanding to the installation accuracy of muffler plate, production efficiency can be influenced, gap setting is excessive, is increased equivalent to covert
The volume of wind turbine, have impact on convenience to a certain extent.
A kind of low noise high-speed centrifugal fan as described above, the arc muffler plate III is semi-cylindrical shaped, here half
Cylinder can be that cylinder is divided into the semicircular cylinder that is formed after two halves or only in cylinder by the plane of cylinder center axis
Mandrel is divided into the semicircular cylinder that is formed after two halves by cylinder is non-, and muffler plate II carries out by welding with arc muffler plate III
Connection.
A kind of low noise high-speed centrifugal fan as described above, the rectangular aperture face of semicircular cylinder and the central shaft of motor are located at
On same plane, the relative position of semicircular cylinder and motor is arranged such not only improve installation be also beneficial to eliminate noise.
A kind of low noise high-speed centrifugal fan as described above, the rectangular aperture face of the semicircular cylinder and the center of semicircular cylinder
Axis is in the same plane, that is, cylinder is divided into two halves by the plane for cylinder center axis that the scheme being more highly preferred to was semicircular cylinder
The semicircular cylinder formed afterwards.
Utility model mechanism：
The present invention achieves preferable eliminate the noise except the effect of noise by the installation muffler plate before and after the back side panel of casing
Fruit, the muffler plate I between back shroud of impeller and the back side panel of casing can reduce the aerodynamic noise in volute of blower, be located at
Muffler plate II behind the back side panel of casing cooperates with the arc muffler plate III being sleeved on outside motor, can absorb motor and make an uproar
Sound.Arc muffler plate III is semi-cylindrical shaped, does not influence motor base installation first, in addition the length of cylinder is according to actual installation environment
Determine, the longer noise elimination effect of its length is better.When fan inlet connects air, fan inlet noise is larger, especially blower air
After kinetic noise is superimposed with noise of motor, fan inlet noise becomes very big, and the present invention can effectively absorb noise of motor acoustic energy,
And propagation of the noise of motor to air inlet is blocked, effectively reduce fan inlet noise.
Beneficial effect：
(1) a kind of low noise high-speed centrifugal fan of the utility model, by installing muffler plate additional inside and outside casing, both reduced
Aerodynamic noise in casing, and the electromagnetic noise of motor is reduced, overall noise reduction is obvious；
(2) a kind of low noise high-speed centrifugal fan of the utility model, muffler plate is easy for installation, the design of arc muffler plate
Not only there is good noise reduction, but also do not influence the installation of motor base；
(3) a kind of low noise high-speed centrifugal fan of the utility model, it is simple in structure, it is easy to assembly, it is also applied for
There is the transformation of centrifugal blower, it is with good economic efficiency.
Brief description of the drawings
Fig. 1 is the structure diagram of the centrifugal blower of the prior art；
Fig. 2 is the structure diagram of the low-noise high-speed centrifugal fan of the present invention；
Fig. 3 is Section A-A figure in Fig. 2；
Wherein, 1- casings, 2- air inlets, 3- back shroud of impeller, 4- motors, 5- muffler plates I, 6- muffler plate II, 7- arc
Muffler plate III.
Embodiment
The utility model is expanded on further below in conjunction with the accompanying drawings.It is to be understood that these embodiments are merely to illustrate this practicality newly
Type rather than limitation the scope of the utility model.In addition, it should also be understood that, after reading the content taught by the present invention, this
Field technology personnel can make various changes or modifications the utility model, and such equivalent forms equally fall within the appended power of the application
Sharp claim limited range.
Embodiment 1
A kind of low-noise high-speed centrifugal fan, as shown in Fig. 2, including casing 1, air inlet 2, back shroud of impeller 3 and motor
4, the back side panel of casing is two-sided to be located at impeller rear cover covered with muffler plate, that is, muffler plate I5 and muffler plate II6, wherein muffler plate I5
Between plate 3 and the back side panel of casing, in annular shape, internal filling glass cotton, the thickness of filler is 20mm, itself and impeller rear cover
Gap between plate 3 is 4mm, and back side panel of casing is completely covered for it；Muffler plate II6 is located at the outside of casing 1, in annular shape,
Internal filling glass cotton, the thickness of filler is 10mm, its its part covers the back side panel of casing.Muffler plate I5 and muffler plate
Offer circular through hole a and circular through hole b in II6 respectively, the output shaft of motor 4 is worn successively in muffler plate I 5 and muffler plate II 6
Through hole b, the back side panel of casing and through hole a is crossed to be connected with back shroud of impeller 3.
II 6 opposite side of muffler plate is welded with arc muffler plate III 7, and arc muffler plate III 7 for rectangular surfaces as shown in figure 3, open
Mouthful semi-cylindrical shaped, positioned at the surface of motor 4, internal filling glass cotton, the thickness of filler is 20mm, its rectangular aperture face
Central shaft, the central shaft of motor 4 with semicircular cylinder are respectively positioned in same level.
Empirical tests, a kind of low-noise high-speed centrifugal fan of the utility model are bright compared to conventional centrifugal wind turbine noise reduction
It is aobvious and simple in structure, it is easy to assembly, the transformation to existing centrifugal blower is also applied for, it is with good economic efficiency.
Embodiment 2
A kind of low-noise high-speed centrifugal fan, its structure is same as Example 1, and difference is muffler plate I and impeller rear cover
Gap between plate is 6mm, and the thickness of muffler plate I inner stuffings is 10mm, and the thickness of muffler plate II inner stuffings is 20mm, is disappeared
The thickness of sound plate III inner stuffings is 10mm.
Embodiment 3
A kind of low-noise high-speed centrifugal fan, its structure is same as Example 1, and difference is muffler plate I and impeller rear cover
Gap between plate is 5mm, and the thickness of muffler plate I inner stuffings is 12mm, and the thickness of muffler plate II inner stuffings is 15mm, is disappeared
The thickness of sound plate III inner stuffings is 15mm.
Embodiment 4
A kind of low-noise high-speed centrifugal fan, its structure is same as Example 1, and difference is muffler plate I and impeller rear cover
Gap between plate is 4.5mm, and the thickness of muffler plate I inner stuffings is 15mm, and the thickness of muffler plate II inner stuffings is 18mm,
The thickness of muffler plate III inner stuffings is 16mm.
Claims (9)
1. a kind of low noise high-speed centrifugal fan, including casing, back shroud of impeller and motor, it is characterized in that：The back side panel of casing
Simultaneously covered with muffler plate I, another side is covered with muffler plate II；
There are gap between back shroud of impeller and the back side panel of casing and between back shroud of impeller for muffler plate I；
Muffler plate II is connected with arc muffler plate III, and arc muffler plate III is sleeved on outside motor.
2. a kind of low noise high-speed centrifugal fan according to claim 1, it is characterised in that the muffler plate I, muffler plate
II and the inside filling glass cotton of arc muffler plate III, the thickness of filler is identical or different, the thickness of filler for 10~
20mm。
3. a kind of low noise high-speed centrifugal fan according to claim 1, it is characterised in that the muffler plate I and noise elimination
Offer through hole a and through hole b in plate II respectively, the output shaft of motor sequentially pass through through hole b, the back side panel of casing and through hole a with
Back shroud of impeller connects.
4. a kind of low noise high-speed centrifugal fan according to claim 3, it is characterised in that the through hole a and through hole b are
Circular through hole.
5. a kind of low noise high-speed centrifugal fan according to claim 4, it is characterised in that the muffler plate I and noise elimination
Plate II is annular shape, and the back side panel of casing is completely covered the muffler plate I, and the muffler plate II is by the back side panel part of casing
Covering.
6. a kind of low noise high-speed centrifugal fan according to claim 1, it is characterised in that the size in the gap is 4
~6mm.
A kind of 7. low noise high-speed centrifugal fan according to claim 1, it is characterised in that the arc muffler plate III
For semi-cylindrical shaped, muffler plate II is attached by welding with arc muffler plate III.
A kind of 8. low noise high-speed centrifugal fan according to claim 7, it is characterised in that the rectangular aperture face of semicircular cylinder
It is in the same plane with the central shaft of motor.
9. a kind of low noise high-speed centrifugal fan according to claim 8, it is characterised in that the rectangle of the semicircular cylinder is opened
The central shaft of mouth face and semicircular cylinder is in the same plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721361465.5U CN207349128U (en) | 2017-10-23 | 2017-10-23 | A kind of low noise high-speed centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721361465.5U CN207349128U (en) | 2017-10-23 | 2017-10-23 | A kind of low noise high-speed centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207349128U true CN207349128U (en) | 2018-05-11 |
Family
ID=62355241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721361465.5U Active CN207349128U (en) | 2017-10-23 | 2017-10-23 | A kind of low noise high-speed centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207349128U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110939587A (en) * | 2018-09-24 | 2020-03-31 | 马勒国际公司 | Air blower with motor support |
-
2017
- 2017-10-23 CN CN201721361465.5U patent/CN207349128U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110939587A (en) * | 2018-09-24 | 2020-03-31 | 马勒国际公司 | Air blower with motor support |
| US11597253B2 (en) | 2018-09-24 | 2023-03-07 | Mahle International Gmbh | Blower comprising a motor mount |
| CN110939587B (en) * | 2018-09-24 | 2023-03-10 | 马勒国际公司 | Air blower with motor support |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201818 2, 1501, 1519, 1533, Chengliu Middle Road, Jiading District, Shanghai. Patentee after: Shanghai Rui Chen environmental protection Polytron Technologies Inc Address before: 201818 2, 1501, 1519, 1533, Chengliu Middle Road, Jiading District, Shanghai. Patentee before: Shanghai Richen Environmental Technology Co., Ltd. |