CN206320074U - A kind of double turbine centrifugal extractor fan - Google Patents
A kind of double turbine centrifugal extractor fan Download PDFInfo
- Publication number
- CN206320074U CN206320074U CN201621156231.2U CN201621156231U CN206320074U CN 206320074 U CN206320074 U CN 206320074U CN 201621156231 U CN201621156231 U CN 201621156231U CN 206320074 U CN206320074 U CN 206320074U
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- CN
- China
- Prior art keywords
- impeller
- blade
- extractor fan
- arc
- double turbine
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a kind of double turbine centrifugal extractor fan, including housing, the exhaust outlet and base that are fixedly connected with the casing, centrifugal fan is installed in the housing, the centrifugal fan includes the first impeller and the second impeller, and second impeller and the first impeller are coaxially mounted on the output shaft of motor and the second impeller is arranged in the first impeller.The utility model is by using the double Impeller Design being coaxially disposed, and it is small to solve existing extractor fan exhausting amount in low-speed running, the problem of ventilation effect is bad.
Description
Technical field
The utility model is related to extractor fan field, specifically, is a kind of double turbine centrifugal extractor fan.
Background technology
Centrifugal blower is the mechanical energy by input, improves gas pressure and supplies gas side by side the machinery of body, it is a kind of driven
Fluid machinery.Centrifugal blower is widely used in the ventilation of factory, mine, tunnel, cooling tower, vehicle, ship and building, dust discharge
And cooling；The ventilation of boiler and industrial furnace and air inducing；Cooling and ventilation in the apparatus of air conditioning and domestic electric appliance.
The air suction efficiency of centrifugal blower and the impeller of centrifugal fan have direct relation, and existing centrifugal blower is used
Multiple blades are installed on the mutliblade form of single impeller, i.e., one impeller, rotation changes the power provided using drive device at a high speed
The flow direction and flow velocity of changing air, so as to realize the effect of exhausting.The advantage of existing centrifugal exhaust fan is：Balance is high, in work
During the vibration that produces it is small, stability is outstanding, and exhausting amount is big when running at high speed.But still there is following defect：In low speed
Under operating condition, exhausting amount is small, and exhausting amount is obvious as impeller rotation velocity declines decay；Meanwhile, when running at high speed, due to
The flow direction of air is consistent, and air produces compression and accelerated under impeller high speed turning effort, and wind-dryness increase significantly affects life cycle
Border.For example, the extractor fan in air-conditioning is when in high speed ventilation state, wind-dryness is larger, influences the normal work of people and stops
Breath, especially evening noise is particularly evident.
Utility model content
The purpose of this utility model is to provide a kind of double turbine centrifugal extractor fan, for solving existing centrifugation exhausting
Device exhausting amount in low-speed running is smaller, the problem of scavenging efficiency is low, and wind-dryness is big when running at high speed.The utility model is adopted
Designed with double turbine centrifugal, speedup of being pressurizeed twice to air can significantly improve capacity in low-speed running, together
When, due to the alternating action of double impeller, upset original single and rule flow direction, reduced air and depart from impeller
When speed, can to fluid produce noise substantially weaken.
In order to reach that above-mentioned technique effect the utility model is achieved through the following technical solutions：
A kind of double turbine centrifugal extractor fan, including housing, the exhaust outlet and base that are fixedly connected with the casing, the shell
Centrifugal fan is installed in vivo, the centrifugal fan includes the first impeller and the second impeller, second impeller and the first impeller
It is coaxially mounted on the output shaft of motor and the second impeller is arranged in the first impeller.
Preferably, the radii ratio scope of first impeller and the second impeller is 1:（0.7-0.8）.
Preferably, it is leaf that the blade on first impeller, which tilts the minimum clearance installed and between blade along direction of rotation,
The 80% of piece width.
Preferably, it is leaf that the blade on second impeller, which tilts the minimum clearance installed and between blade along direction of rotation,
The 60%-68% of piece width.
Preferably, in the cross section of the blade blade face edge along air-flow direction successively by concave arc R1, dome arc
R2, concave arc R3 and the round and smooth excessive connections of straight line L are constituted, and the ratio between wherein concave arc R1, dome arc R2, concave arc R3 radiuses are 1:
1.2:1, concave arc R1, dome arc R2, concave arc R3 and straight line L length ratios are 3:4:3:2.
Preferably, blade face edge is radius R4 circular arc, and R4 outside the cross section of the blade：R1=5:1.
Preferably, it is also equipped with safety net on the housing.
The utility model compared with prior art, with advantages below and beneficial effect：
（1）The utility model solves existing extractor fan low by using the double Impeller Design being coaxially disposed
Exhausting amount is small during speed operating, the problem of ventilation effect is bad.
（2）The double impeller that the utility model is used determines the mounting distance of blade according to width of blade, effective to realize
The resistance that blade is produced to air is reduced while flow increase is ensured, so that the driving for reducing drive device is accorded with
Close, reduce driving energy consumption.
（3）The impeller blade that the utility model is used is by fluid experiment repeatedly, with reference to aerodynamic design, it is ensured that
Under each rotating speed, adhesive force when air flows through blade surface is substantially reduced, and increases air circulation, with existing centrifugation wind
Fan is compared, and the utility model has the advantages that obvious air suction efficiency is high, wind-dryness is small, energy consumption is low.
Brief description of the drawings
Fig. 1 is broken section structural representation of the present utility model；
Fig. 2 is A-A sectional views in Fig. 1；
Fig. 3 is the cross section schematic diagram of centrifugal fan；
Fig. 4 is schematic diagram for blade profile section view；
Wherein 1- exhaust outlets；2- safety nets；3- housings；4- centrifugal fans；The impellers of 41- first；The impellers of 42- second；5- bottoms
Seat；6- mounting holes；7- motors.
Embodiment
The utility model is described in further detail with reference to embodiment, but embodiment of the present utility model is not
It is limited to this.
Embodiment 1：
With reference to shown in accompanying drawing 1-3, a kind of double turbine centrifugal extractor fan, including housing 3, be fixedly connected with housing 3
Centrifugal fan 4 is installed, the centrifugal fan 4 includes the first impeller 41 and the second leaf in exhaust outlet 1 and base 5, the housing 3
Wheel 42, the impeller 41 of the second impeller 42 and first is coaxially mounted on the output shaft of motor 7 and the second impeller 42 is installed in the
In one impeller 41.
Operation principle：
Start after this extractor fan, under the driving of motor 7, centrifugal fan 4 is in counterclockwise rotates, i.e. the first impeller
41 and second impeller 42 rotate coaxially,（Need exist for explanation, no matter drive device be motor or internal combustion engine either its
He can provide the device of driving force, and no matter the direction of drive device rotation is counterclockwise or clockwise, it is necessary to especially clear and definite
, the direction one that the incline direction of the blade installed on the centrifugal fan 4 in the utility model must rotate with centrifugal fan 4
Cause, otherwise, air inlet is then become at exhaust outlet 1）, under the collective effect of the first impeller 41 and the second impeller 42, air by
The axial direction suction of centrifugal fan 4, accelerates change to exclude reality from exhaust outlet 1 backward through the first impeller 41 and the two-stage of the second impeller 42
The purpose of existing exhausting.
Because the blade of high speed rotation has the effect of pressurization speedup to air, by the first impeller 41 and the second impeller 42
After two-stage pressurization speedup, the effect compared to one-level pressurization speedup is obviously improved, and it is left that exhausting amount improves 15%-48% under different rotating speeds
It is right（Experiment most bottom rotating speed is not less than 120 revs/min）；Due to there is radial clearance between the first impeller 41 and the second impeller 42, warp
Crossing the second impeller 42 accelerates the air that has of increase to be changed flow direction again under the turning effort of the first impeller 41, therefore the
Two impellers 42 not only accelerate to air, while certain turbulent flow is generated while direction is changed, so as to realize reduction wind
Dry effect.
Embodiment 2：
With reference to shown in accompanying drawing 1-4, in order to further improve exhausting amount of the present utility model and muting function, implementing
Following structure is further improved on the basis of example 1, the radii ratio model of the impeller 42 of the first impeller 41 and second
Enclose for 1:（0.7-0.8）.
In the present embodiment, the blade on first impeller 41 is tilted along direction of rotation to be installed and between the minimum between blade
Gap is the 80% of width of blade.
In the present embodiment, the blade on second impeller 42 is tilted along direction of rotation to be installed and between the minimum between blade
Gap is the 60%-68% of width of blade.
In the present embodiment, in the cross section of the blade blade face edge along air-flow direction successively by concave arc R1, convex
The ratio between circular arc R 2, concave arc R3 and the round and smooth excessive connection compositions of straight line L, wherein concave arc R1, dome arc R2, concave arc R3 radiuses
For 1:1.2:1, concave arc R1, dome arc R2, concave arc R3 and straight line L length ratios are 3:4:3:2.
Preferably, blade face edge is radius R4 circular arc, and R4 outside the cross section of the blade：R1=5:1.
In the present embodiment, safety net 2 is also equipped with the housing 3, the installation site of safety net 2 is directed at centrifugal fan
4 air inlet, damage is caused for stopping that foreign matter enters to the utility model in centrifugal fan 4.
In the present embodiment, the bottom of housing 3 is provided with base 5, and the base 5 is provided with mounting hole 6, for this to be used
New fixation is used.
Operation principle：
Analytic demonstration is carried out by substantial amounts of experiment, is tested using the technical scheme in the utility model, works as blade
The excessive wind-dryness decibel of quantity can increase therewith, and wind-dryness decibel rises substantially especially when running at high speed, when blade quantity is too low,
Wind-dryness decibel reduction, single exhausting amount drastically declines, work as the first impeller 41 and the second impeller 42 half obtained by lot of experimental data
Footpath ratio range is 1:（0.7-0.8）, the blade on the first impeller 41 and the second impeller 42 is tilted along direction of rotation to be installed and leaf
When minimum clearance between piece is the 60%-68% of correspondence width of blade, wind-dryness and exhausting amount reach optimum state.When the horizontal stroke of blade
In section blade face edge along air-flow direction successively by concave arc R1, dome arc R2, concave arc R3 and straight line L is round and smooth excessively connects
Composition is connect, the ratio between wherein concave arc R1, dome arc R2, concave arc R3 radiuses is 1:1.2:1, concave arc R1, dome arc R2, recessed circle
Arc R3 and straight line L length ratios are 3:4:3:When 2, the flow resistance of air is minimum, and the holdup time of air is most short, and circulation is optimal.
Other operation principle be the same as Examples 1 of the present embodiment are identical, just no longer repeat one by one herein.
The above, is only preferred embodiment of the present utility model, and any formal limit is not done to the utility model
System, every any simple modification made according to technical spirit of the present utility model to above example, equivalent variations are each fallen within
Within protection domain of the present utility model.
Claims (7)
1. a kind of double turbine centrifugal extractor fan, including housing（3）With housing（3）The exhaust outlet being fixedly connected（1）And base
（5）, it is characterised in that the housing（3）Centrifugal fan is inside installed（4）, the centrifugal fan（4）Including the first impeller（41）
With the second impeller（42）, second impeller（42）With the first impeller（41）It is coaxially mounted to motor（7）Output shaft on and
Two impellers（42）Installed in the first impeller（41）It is interior.
2. a kind of double turbine centrifugal extractor fan according to claim 1, it is characterised in that first impeller（41）
With the second impeller（42）Radii ratio scope be 1:（0.7-0.8）.
3. a kind of double turbine centrifugal extractor fan according to claim 1, it is characterised in that first impeller（41）
On blade along direction of rotation tilt install and blade between minimum clearance be width of blade 80%.
4. a kind of double turbine centrifugal extractor fan according to claim 1, it is characterised in that second impeller（42）
On blade along direction of rotation tilt install and blade between minimum clearance be width of blade 60%-68%.
5. a kind of double turbine centrifugal extractor fan according to claim 3 or 4, it is characterised in that the horizontal stroke of the blade
In section blade face edge along air-flow direction successively by concave arc R1, dome arc R2, concave arc R3 and straight line L is round and smooth excessively connects
Composition is connect, the ratio between wherein concave arc R1, dome arc R2, concave arc R3 radiuses is 1:1.2:1, concave arc R1, dome arc R2, recessed circle
Arc R3 and straight line L length ratios are 3:4:3:2.
6. a kind of double turbine centrifugal extractor fan according to claim 3 or 4, it is characterised in that the horizontal stroke of the blade
Blade face edge is radius R4 circular arc, and R4 outside section：R1=5:1.
7. a kind of double turbine centrifugal extractor fan according to any one in claim 1-4, it is characterised in that described
Housing（3）On be also equipped with safety net（2）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621156231.2U CN206320074U (en) | 2016-10-31 | 2016-10-31 | A kind of double turbine centrifugal extractor fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621156231.2U CN206320074U (en) | 2016-10-31 | 2016-10-31 | A kind of double turbine centrifugal extractor fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206320074U true CN206320074U (en) | 2017-07-11 |
Family
ID=59263111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621156231.2U Expired - Fee Related CN206320074U (en) | 2016-10-31 | 2016-10-31 | A kind of double turbine centrifugal extractor fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206320074U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113048768A (en) * | 2021-04-29 | 2021-06-29 | 江西斯米克陶瓷有限公司 | Drying treatment method for ceramic blank drying process |
-
2016
- 2016-10-31 CN CN201621156231.2U patent/CN206320074U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113048768A (en) * | 2021-04-29 | 2021-06-29 | 江西斯米克陶瓷有限公司 | Drying treatment method for ceramic blank drying process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170711 Termination date: 20181031 |