CN207406537U - A kind of centrifugal blower - Google Patents
A kind of centrifugal blower Download PDFInfo
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- CN207406537U CN207406537U CN201721361507.5U CN201721361507U CN207406537U CN 207406537 U CN207406537 U CN 207406537U CN 201721361507 U CN201721361507 U CN 201721361507U CN 207406537 U CN207406537 U CN 207406537U
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- impeller
- blade
- centrifugal blower
- front shroud
- air inlet
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Abstract
The utility model is related to a kind of centrifugal blowers, including casing, air inlet, blade, front shroud of impeller, back shroud of impeller and motor, wherein, front shroud of impeller is separated with blade, the inside edge of front shroud of impeller is connected with air inlet, outer ledge is connected with the cylinder being fixed on air inlet, front shroud of impeller, air inlet and cylinder form an inner wall for smooth surface and it is interior without leave among to the gradual increased hollow cylinder in both ends.The utility model separates front shroud of impeller with blade, reduces difficulty of processing, integrally casting shaping front shroud of impeller, air inlet and cylinder, both air inlet component had been reduced, and it can play the role of anti-vortex ring again, reduce large scale whirlpool in casing, fan efficiency is improved, reduces fan noise.The centrifugal blower of the utility model has the characteristics that processing simple, low processing cost, matching requirements is low and good integral strength, while has the characteristics that rotating speed is high and efficient, rotating speed >=15000rpm, efficiency >=64%.
Description
Technical field
The utility model belongs to universal machine field of ventilation equipment, is related to a kind of centrifugal blower.
Background technology
Centrifugal blower is the pressure energy and kinetic energy that gas is converted to using the mechanical energy of draught fan impeller rotation, and gas is defeated
It sees off, gas is rotated through impeller and generates 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.In centrifugal blower, gas is from axially into impeller, when gas flows through impeller
It is radially redirected, subsequently into diffuser.In diffuser, the gas and changing flow direction and increase of conduit section area makes
Flow slowing down, this decelerating effect convert kinetic energy into pressure energy.Pressure, which increases, to be occurred mainly in impeller, next is happened at expansion
Press through journey.
Centrifugal blower essential structure is as shown in Figure 1, including casing, air inlet, blade, front shroud of impeller, back shroud of impeller
And motor, in the manufacture of existing Small Centrifugal Fan, blade, front shroud of impeller and back shroud of impeller are often integrally machined,
Complicated integral structure, difficulty of processing is big, and generally requiring five axis and more than machining center could process, and processing cost is higher, and by
Material properties limit, and integral strength is poor to be only capable of meeting the slow-speed of revolution and the requirement of low-pressure wind turbine；And it is high for matching requirements,
Current collector and impeller assembling gap cross conference and cause pressure leakage, it is difficult to ensure fan outlet pressure.
Therefore, a kind of processing of exploitation is simple, of low cost, matching requirements are low and the centrifugal blower of good integral strength is great existing
Sincere justice.
Utility model content
The purpose of the utility model is to overcome prior art centrifugal blower difficulty of processing is big, processing cost is low, matching requirements
The defects of high and integral strength difference requirement, provide it is a kind of process simple, of low cost, matching requirements are low, good integral strength and
Rotating speed and the higher centrifugal blower of efficiency.
To achieve the above object, the utility model is solved by the following technical programs：
A kind of centrifugal blower, including casing, air inlet, blade, front shroud of impeller, back shroud of impeller and motor, the leaf
Take turns back shroud for it is circular and with the output axis connection of motor, the blade circle distribution is after the impeller on cover board；Before the impeller
Cover board is separated with blade, is simplified the structure of prophyll piece integral piece, is reduced difficulty of processing, reduces processing cost；And by
In the reduction of difficulty of processing, available material is more, and selecting intensity, more preferably material is processed, and can promote integral strength.
As preferred technical solution：
A kind of centrifugal blower as described above, the inside edge of the front shroud of impeller are connected with air inlet, outer ledge
Be connected with the cylinder being fixed on air inlet, the front shroud of impeller, air inlet and cylinder form an inner wall as smooth surface and
Inside without leave among to the gradual increased hollow cylinder in both ends.
The distance between a kind of centrifugal blower, the front shroud of impeller two faces opposite with blade as described above≤
The distance between 1mm, front shroud of impeller two faces opposite with blade is usually what is determined according to machining accuracy, theoretically smaller
It is better, apart from it is excessive be easy to cause leaf top leakage loss it is larger, experiments have shown that, distance often increase 1mm, pressure about reduces by 5%.
A kind of centrifugal blower as described above is provided around the ring of blade on the front shroud of impeller face opposite with blade
Shape protrusion, the annular projection can substantially reduce leaf top leakage loss, and raised shape is not limited to annular or before the impeller
Multiple protrusions of circumference uniform distribution on cover board, as long as raised position can play the role of reducing the leakage loss of leaf top.
A kind of centrifugal blower as described above, the annular projection is 0mm along itself axial spacing with blade, annular convex
It plays outer rim and just wraps up vane nose, you can to reduce the leakage loss of leaf top, and do not stop that gas flows；The annular projection
It is radially 1~2mm with the spacing of blade along itself, which set conference to cause certain atmospheric pressure lost, and set too small meeting
It causes process and assemble difficulty excessive, influences yields.
A kind of centrifugal blower as described above, the annular projection, front shroud of impeller, air inlet and cylinder integrally casting into
Type is welded with iron plate；The air inlet is cone arc, can effectively reduce flow losses.
A kind of centrifugal blower as described above, the back side panel of the casing are bolted to connection the installing plate in motor
On, the output axis connection of the back shroud of impeller and motor；It is further fixed on adding on the blade face opposite with front shroud of impeller
Qiang Huan, with the intensity of reinforced blade and back shroud of impeller, the outer ledge of the reinforcing ring intersects with the outer ledge of blade,
Middle outer ledge refers to central axis apart from motor output shaft apart from farthest edge.
A kind of centrifugal blower as described above, the reinforcing ring are laminated structure, and the width of the reinforcing ring is 2~5mm,
It is excessive to strengthen ring width, can stop that gas flows, the too small then stiffening effect of width is bad.
A kind of centrifugal blower as described above, the reinforcing ring, blade and back shroud of impeller entirety milling shaping, the leaf
Piece is arc-shaped or airfoil type, and circular arc type vane efficiency is general, but processing is relatively simple, and wing blades efficiency is relatively high,
But processing is more complicated.
A kind of centrifugal blower as described above, the rotating speed of centrifugal blower are >=15000rpm, the efficiency of centrifugal blower >=
64%.
Utility model mechanism：
The utility model by air inlet, impeller cover and cylinder integration processing by realizing front shroud of impeller and blade
Separation, on the one hand, reduce air inlet component, and anti-vortex ring can be played the role of, after gas outflow impeller enters spiral case, edge
The deceleration flowing of spiral case diffusion, flow field dynamics is improved, reduces vortex, reduce large scale whirlpool in casing, improve
Fan efficiency, overcomes in the prior art that area of space is larger between centrifugal blower inner impeller front shroud and case front, gas
The problem of generating vortex in this space after outflow impeller, cause energy loss, reduce fan efficiency, on the other hand, due to
Impeller blade and back shroud of impeller are integrally machined, and without front shroud of impeller, stress suffered by wind turbine greatly reduces, and rotation speed of fan can be with
More than 15000rpm is increased to, blower pressure can be effectively improved.In addition, the front shroud of impeller upper end of the utility model is equipped with a ring
Shape protrusion, it is possible to reduce leaf top leakage loss.
Advantageous effect：
(1) front shroud of impeller with blade is separated, significantly reduces difficulty of processing by a kind of centrifugal blower of the utility model
And processing cost, front shroud of impeller, air inlet and cylinder integrally casting shaping, both reduced air inlet component, and it again can be with
Play the role of anti-vortex ring, reduce large scale whirlpool in casing, improve fan efficiency, reduce fan noise；
(2) a kind of centrifugal blower of the utility model, blade and back shroud of impeller integrally casting shaping, stress suffered by wind turbine
The high-revolving requirement of wind turbine can be met by greatly reducing, and improve blower pressure；
(3) a kind of centrifugal blower of the utility model, has processing simple, low processing cost, the matching requirements low, whole
Intensity can meet well high-revolving the characteristics of requiring.
Description of the drawings
Fig. 1 is the structure diagram of the centrifugal blower of the prior art；
Fig. 2 is a kind of structure diagram of the centrifugal blower of the utility model；
Fig. 3 is the partial enlarged view of A in Fig. 2；
Fig. 4 is another structure diagram of the centrifugal blower of the utility model；
Fig. 5 is the local partial enlarged view of A in Fig. 4；
Fig. 6 is the structure diagram of the hollow cylinder of front shroud of impeller, air inlet and the cylinder composition of the utility model；
Wherein 1- casings, 2- air inlets, 3- blades, 4- motors, 5- front shroud of impeller, 6- back shroud of impeller, 7- reinforcing rings,
8- cylinders, 9- annular projections.
Specific embodiment
The following further describes the utility model with specific embodiments.It is to be understood that these embodiments are merely to illustrate
The utility model rather than limitation the scope of the utility model.In addition, it should also be understood that, it is reading in the utility model instruction
After appearance, those skilled in the art can make various changes or modifications the utility model, and such equivalent forms equally fall within this
Apply for the appended claims limited range.
Embodiment 1
A kind of centrifugal blower, as shown in Fig. 2, including casing 1, air inlet 2, blade 3, front shroud of impeller 5, back shroud of impeller
6 and motor 4.
Casing 1 is the cored screw shape unsymmetric structure of a bottom opening, and back side panel, that is, not opening face of casing 1 passes through spiral shell
Bolt is fixedly connected on the installing plate of motor 4, and aperture position corresponds to cone arc air inlet 2, air inlet 2 and annular impeller front shroud
The impeller that blade 3 is formed, impeller diameter 100mm is completely covered in 5 connections, front shroud of impeller 5, and blade 3 is arc-shaped, impeller
Front shroud 5 and blade 3 are that the distance between separated structure, two faces opposite with blade 3 of front shroud of impeller 5 is 1mm, before impeller
The inside edge of cover board 5 is connected with air inlet 2, and outer ledge is connected with the cylinder 8 being fixed on air inlet 2, front shroud of impeller
5th, air inlet 2 and cylinder 8 form an inner wall for smooth surface and it is interior without leave among to the gradual increased hollow cylinder such as Fig. 6 in both ends
It is shown, as shown in figure 3, being provided around the annular projection 9 of blade, annular projection 9 on the face opposite with blade 3 of front shroud of impeller 5
It is 0mm with the spacing of blade vertically, annular projection 9 is radially 1mm with the spacing of blade, and 3 opposite side of blade is disposed with leaf
Back shroud 6 is taken turns, 6 center of back shroud of impeller is provided with through hole and the output axis connection with motor 4.
Blade 3 and the whole milling of back shroud of impeller 6, annular projection 9, the 8 one casting of front shroud of impeller 5, air inlet 2 and cylinder
Type is caused, the back side panel of casing 1 is bolted to connection on the installing plate of motor 4.
The rotating speed of the centrifugal blower is 15050rpm, and the efficiency of centrifugal blower is 70.2%.Empirical tests, the utility model
Centrifugal blower difficulty of processing is low, low processing cost, and integral strength is high, and design is reasonable, and matching requirements are low.
Embodiment 2
A kind of centrifugal blower, as shown in figure 4, its basic structure is same as Example 1, difference is it in blade 3 and leaf
Wheel front shroud 5 is fixed with sheet reinforcing ring 7 on opposite face, as shown in figure 5, the outside of the outer ledge of reinforcing ring 7 and blade 3
Edge intersects, and wherein outer ledge refers to central axis apart from motor output shaft apart from farthest edge, the width of reinforcing ring 7
For 5mm, reinforcing ring 7, blade 3 and the whole milling of back shroud of impeller 6.
The rotating speed of the centrifugal blower is 20000rpm, and the efficiency of centrifugal blower is 65%.Compared with Example 1, this implementation
Example enhances the integral strength of centrifugal blower by increasing reinforcing ring.
Empirical tests, the centrifugal blower difficulty of processing of the utility model is low, low processing cost, and integral strength is high, and design is closed
Reason, matching requirements are low.
Embodiment 3
A kind of centrifugal blower, basic structure is same as Example 1, and difference is it, and cover board is opposite with impeller before the impeller
Face on there is no annular projection, front shroud of impeller, air inlet and cylinder integrally casting shaping.
The rotating speed of the centrifugal blower is 15000rpm, and the efficiency of centrifugal blower is 70%.Empirical tests, the utility model from
Heart wind turbine difficulty of processing is low, low processing cost, and integral strength is high, and design is reasonable, and matching requirements are low.
Embodiment 4
A kind of centrifugal blower, basic structure is same as Example 2, and difference is it, and cover board is opposite with impeller before the impeller
Face on there is no annular projection, front shroud of impeller, air inlet and cylinder integrally casting shaping.
The rotating speed of the centrifugal blower is 17800rpm, and the efficiency of centrifugal blower is 64%.Empirical tests, the utility model from
Heart wind turbine difficulty of processing is low, low processing cost, and integral strength is high, and design is reasonable, and matching requirements are low.
Claims (10)
1. a kind of centrifugal blower, including casing, air inlet, blade, front shroud of impeller, back shroud of impeller and motor, the impeller
Back shroud for it is circular and with the output axis connection of motor, the blade circle distribution is after the impeller on cover board, it is characterized in that：It is described
Front shroud of impeller is separated with blade.
2. a kind of centrifugal blower according to claim 1, which is characterized in that the inside edge of the front shroud of impeller with into
Air port connects, and outer ledge is connected with the cylinder being fixed on air inlet, and the front shroud of impeller, air inlet and cylinder form one
Inner wall for smooth surface and it is interior without leave among to the gradual increased hollow cylinder in both ends.
3. a kind of centrifugal blower according to claim 2, which is characterized in that the front shroud of impeller it is opposite with blade two
The distance between a face≤1mm.
A kind of 4. centrifugal blower according to claim 3, which is characterized in that the front shroud of impeller face opposite with blade
On be provided around the annular projection of blade.
5. a kind of centrifugal blower according to claim 4, which is characterized in that the annular projection is vertically between blade
Away from for 0mm；The annular projection is radially 1~2mm with the spacing of blade.
6. a kind of centrifugal blower according to claim 5, which is characterized in that the annular projection, front shroud of impeller, air inlet
Mouth and cylinder integrally casting shaping are welded with iron plate.
7. a kind of centrifugal blower according to claim 1, which is characterized in that the back side panel of the casing is bolted
It is connected on the installing plate of motor, the output axis connection of the back shroud of impeller and motor；The blade and front shroud of impeller phase
To face on be further fixed on reinforcing ring, the outer ledge of the reinforcing ring intersects with the outer ledge of blade, wherein outer ledge
Refer to the central axis apart from motor output shaft apart from farthest edge.
8. a kind of centrifugal blower according to claim 7, which is characterized in that the reinforcing ring is laminated structure, described to add
The width of strong ring is 2~5mm.
9. a kind of centrifugal blower according to claim 8, which is characterized in that the reinforcing ring, blade and back shroud of impeller
Whole milling, the blade are circular arc template or airfoil type.
10. a kind of centrifugal blower according to claim 9, which is characterized in that rotating speed >=15000rpm of centrifugal blower, from
Efficiency >=64% of heart wind turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721361507.5U CN207406537U (en) | 2017-10-23 | 2017-10-23 | A kind of centrifugal blower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721361507.5U CN207406537U (en) | 2017-10-23 | 2017-10-23 | A kind of centrifugal blower |
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| Publication Number | Publication Date |
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| CN207406537U true CN207406537U (en) | 2018-05-25 |
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ID=62320661
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721361507.5U Active CN207406537U (en) | 2017-10-23 | 2017-10-23 | A kind of centrifugal blower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111946662A (en) * | 2020-08-25 | 2020-11-17 | 绍兴市上虞区兴荣风机有限公司 | Centrifugal impeller and fan |
-
2017
- 2017-10-23 CN CN201721361507.5U patent/CN207406537U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111946662A (en) * | 2020-08-25 | 2020-11-17 | 绍兴市上虞区兴荣风机有限公司 | Centrifugal impeller and fan |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
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| 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. |