CN203978930U - A kind of multi-wing centrifugal fan - Google Patents
A kind of multi-wing centrifugal fan Download PDFInfo
- Publication number
- CN203978930U CN203978930U CN201420479691.3U CN201420479691U CN203978930U CN 203978930 U CN203978930 U CN 203978930U CN 201420479691 U CN201420479691 U CN 201420479691U CN 203978930 U CN203978930 U CN 203978930U
- Authority
- CN
- China
- Prior art keywords
- guide vane
- spiral case
- centrifugal fan
- air
- impeller
- 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.)
- Active
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model is a kind of multi-wing centrifugal fan, comprise spiral case, impeller and motor, wherein motor is fixed on spiral case, impeller is arranged in the rotating shaft of motor and is placed in spiral case, offers air intake passage and air-out passage on described spiral case, in the air intake passage on described spiral case, is provided with guide vane device, guide vane device comprises guide vane and wheel hub, guide vane is distributed in the periphery of wheel hub ringwise, and guide vane is obliquely installed, and the direction that guide vane tilts is consistent with vane rotary direction.The utility model is because the air intake passage at spiral case is installed guide vane device, making air-flow enter impeller cavity through the guide vane of guide vane device from air intake passage, produce and the consistent pre-rotation of vane rotary direction, be conducive to reduce the air inlet angle of attack of impeller eye, thereby reduce impeller eye flow losses, improve the air quantity of blower fan.
Description
Technical field
The utility model relates to a kind of blower fan, and especially a kind of multi-wing centrifugal fan belongs to the improvement technology of blower fan.
Background technique
Multi-wing centrifugal fan has that flow coefficient is large, pressure coefficient is high and the feature such as compact structure, obtains extensive use in industrial products, and the blower fan overwhelming majority of kitchen ventilator industry all adopts multi-wing centrifugal fan at present.
The impeller of multi-wing centrifugal fan adopts the form in multiple-blade Shuo Duanye road, and adopt forward blade form, research shows, adopt and accelerate the flow separation that leaf road is conducive to improve multi-wing centrifugal fan Ye Daonei, but accelerate leaf road in order to realize, often need larger blade inlet air flow angle (being conventionally greater than 60 degree) and less blade exit flow angle (being often less than 30 degree), larger inlet air flow angle can make blade inlet air flow produce the larger air inlet angle of attack, produce entrance flow separation, cause inlet loss to strengthen.Therefore flow losses, how to improve multi-wing centrifugal fan impeller eye are to improve the important research direction of multi-wing centrifugal fan performance.
Chinese Patent Application No. 201220696030.7 discloses a kind of blower fan, comprise spiral case, spiral case offers intake grill and exhaust outlet, wherein exhaust outlet is provided with blower fan fly net, fly net is set affects the working life of blower fan mainly for preventing worm from entering spiral case, but can not effectively reduce the flow losses of impeller eye.And for example Chinese Patent Application No. 201310217396.0 discloses a kind of centrifugal blower, intake grill at blower fan arranges air guide sleeve, the end stretch of air guide sleeve is in draught fan impeller chamber, air guide sleeve is mainly for ambient air being introduced in draught fan impeller chamber, thereby raising air quantity, also can reduce noise, but also fail effectively to reduce the flow losses of impeller eye.
Summary of the invention
The purpose of this utility model is at least one the deficiency overcoming described in above-mentioned prior art, and a kind of its impeller eye flow losses multi-wing centrifugal fan that improves is provided.
In order to achieve the above object, the technological scheme that the utility model is taked: a kind of multi-wing centrifugal fan, comprise spiral case, impeller and motor, wherein motor is fixed on spiral case, impeller is arranged in the rotating shaft of motor and is placed in spiral case, on described spiral case, offer air intake passage and air-out passage, in air intake passage on described spiral case, be provided with guide vane device, guide vane device comprises guide vane and wheel hub, guide vane is distributed in the periphery of wheel hub ringwise, and guide vane is obliquely installed, and the direction that guide vane tilts is consistent with vane rotary direction.
In such scheme, after air-flow is by the guide vane of guide vane device, will produce the rotation consistent with vane rotary direction, form and prewhirl in advance, be conducive to reduce the air inlet angle of attack of impeller eye, thereby reduce impeller eye flow losses.
Further, above-mentioned guide vane is plate blade, and the angle of the Transverse plane of guide vane and guide vane device is 45 °≤θ≤85 °, and preferably, the angle of the Transverse plane of guide vane and guide vane device is 60 °≤θ≤75 °.
The outer surface of above-mentioned wheel hub is sphere, plays good air conducting effect.Or the outer surface of above-mentioned wheel hub is plane, and wheel hub offers several vent holes, the loss to Air Flow of minimizing wheel hub surface.
Above-mentioned motor is fixed in spiral case.
For the ease of air is introduced in impeller cavity, the intensity and the installation of being convenient to guide vane device that improve guide vane simultaneously, the air intake passage of above-mentioned spiral case is provided with air inlet ring, and air inlet ring is positioned at the periphery of guide vane device, air inlet ring is fixed on spiral case, and guide vane is connected with air inlet ring away from one end of wheel hub.
In order to reduce operation, reduce cost of material, above-mentioned guide vane device and air inlet ring are formed in one.
Equally, for the ease of air is introduced in impeller cavity, improve the intensity and the installation of being convenient to guide vane device of guide vane simultaneously, the air intake passage of above-mentioned spiral case is provided with air inlet ring, air inlet ring is positioned at the periphery of guide vane device, the periphery of described guide vane device is also provided with connecting ring, and connecting ring is fixed on spiral case, and guide vane is connected with connecting ring away from one end of wheel hub.
Equally, in order to reduce operation, reduce cost of material, above-mentioned guide vane device and connecting ring are formed in one.
The utility model is because the air intake passage at spiral case is installed guide vane device, and the guide vane of guide vane device is obliquely installed, and the direction that guide vane tilts is consistent with vane rotary direction, making air-flow enter impeller cavity through the guide vane of guide vane device from air intake passage, produce and the consistent pre-rotation of vane rotary direction, be conducive to reduce the air inlet angle of attack of impeller eye, thereby reduce impeller eye flow losses, improve the air quantity of blower fan.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment 1 multi-wing centrifugal fan.
Fig. 2 is that Fig. 1 is along the sectional view of D-D direction.
Fig. 3 is embodiment 1 air inlet ring and the front view of guide vane device.
Fig. 4 is that Fig. 3 is along the sectional view of B-B direction.
Fig. 5 is that Fig. 3 is along the sectional view of A-A direction.
Fig. 6 is the structural representation of the utility model embodiment 2 multi-wing centrifugal fan.
Fig. 7 is that Fig. 6 is along the sectional view of E-E direction.
Fig. 8 is embodiment 1 air inlet ring and the front view of guide vane device.
Fig. 9 is that Fig. 8 is along the sectional view of C-C direction.
Embodiment
Below in conjunction with embodiment, the utility model is further described.Wherein, accompanying drawing is only for exemplary illustration, expression be only schematic diagram, but not pictorial diagram can not be interpreted as the restriction to this patent; For embodiment of the present utility model is described better, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product; For a person skilled in the art, in accompanying drawing some known configurations and explanation thereof may to omit be understandable.
The corresponding same or analogous parts of same or analogous label in the utility model embodiment's accompanying drawing, in description of the present utility model, it will be appreciated that, if have term " on ", D score, " left side ", " right side ", " front ", " afterwards ", " vertically ", orientation or the position relationship of indications such as " levels " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore the term of describing position relationship in accompanying drawing is only for exemplary illustration, can not be interpreted as the restriction to this patent.
embodiment 1
Multi-wing centrifugal fan of the present utility model is as shown in Fig. 1 to 5, comprise spiral case 1, impeller 2, air inlet ring 3, motor 4 and guide vane device 5, wherein impeller 2 is arranged in the rotating shaft of motor 4 and is placed in spiral case 1, by motor 4 impeller 2, rotated, on spiral case 1, offer air intake passage 11 and air-out passage 12, air inlet ring 3 is arranged on air intake passage 11 positions of spiral case 1, guide vane device 5 is placed in air intake passage 11, and air inlet ring 3 is located at the periphery of guide vane device 5, guide vane device 5 comprises guide vane 51 and wheel hub 52, guide vane 51 is evenly distributed on the periphery of wheel hub 52 ringwise, guide vane 51 is obliquely installed, and the direction that guide vane 51 tilts is consistent with impeller 2 sense of rotation, one end of guide vane 51 is connected with wheel hub 52 by curved surface connecting body 511, the other end of guide vane 51 is also connected with air inlet ring 3 by curved surface connecting body 511, thereby realize in the air intake passage 11 that guide vane device 5 is fixed on spiral case 1.
Above-mentioned guide vane 51 is plate blade, and guide vane 51 is θ with the angle of the Transverse plane of guide vane device 5, and 45 °≤θ≤85 °, preferred 60 °≤θ≤75 °, and the best is effective.In the present embodiment, the outer surface of above-mentioned wheel hub 52 is sphere, plays good guide functions, and the air flow energy that is positioned at wheel hub 52 positions enters into spiral case 1 smoothly along the sphere of wheel hub 52.
In the present embodiment, in order to reduce operation, reduce cost of material, above-mentioned guide vane device 5 is with air inlet ring 3 for passing through the sheet metal part of stamping forming integrative-structure, and air inlet ring 3 is fixed on spiral case 1 by screw or buckle.Or guide vane device 5 and air inlet ring 3 independent impact briquettings respectively, then weld together and become one, above-mentioned motor 4 is fixed in spiral case 1 by motor fixed rack 13.
Working principle of the present utility model: motor 4 impeller 2 are rotated, in the chamber of impeller 2, form negative pressure, extraneous air-flow enters and passes the guide vane 51 of guide vane device 5 from the air intake passage 11 of spiral case 1, through the air-flow after guide vane 51, can produce the pre-rotation consistent with impeller 2 sense of rotation and enter in the chamber of impeller 2, be conducive to reduce the air inlet angle of attack of impeller 2 entrances, thereby reduce impeller eye flow losses, improve the air quantity of blower fan.
Embodiment 2
The multi-wing centrifugal fan of the present embodiment is similar to Example 1, its difference is: as shown in Fig. 6 to 9, the outer surface of above-mentioned wheel hub 52 is plane, and wheel hub 52 offers several vent holes 521, reduce the end face blocks air of wheel hub 52, Air Flow is lost, the periphery of described guide vane device 5 is also provided with connecting ring 4, the guide vane 51 of guide vane device 5 is connected with connecting ring 6 by curved surface connecting body 511 away from one end of wheel hub 52, in the present embodiment, moulding or sheet metal part that guide vane device 5 and connecting ring 6 are formed in one, during installation, connecting ring 4 is positioned at the outside of air inlet ring 3, by screw, pass connecting ring 6, air inlet ring 3 is connected with spiral case 1, realize the fixed installation of air inlet ring 3 and guide vane device 5, certainly, also can utilize buckle to be stuck on connecting ring 6, thereby by air inlet ring 3, guide vane device 5 is fixing.
The working principle of the multi-wing centrifugal fan of the present embodiment is identical with embodiment 1.
Obviously, above-described embodiment of the present utility model is only for the utility model example is clearly described, and is not the restriction to mode of execution of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all mode of executions.All any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in the protection domain of the utility model claim.
Claims (10)
1. a multi-wing centrifugal fan, comprise spiral case (1), impeller (2) and motor (4), impeller (2) is arranged in the rotating shaft of motor (4) and is placed in spiral case (1), on described spiral case (1), offer air intake passage (11) and air-out passage (12), it is characterized in that: in the air intake passage (11) on described spiral case (1), be provided with guide vane device (5), guide vane device (5) comprises guide vane (51) and wheel hub (52), guide vane (51) is distributed in the periphery of wheel hub (52) ringwise, and guide vane (51) is obliquely installed, and the direction that guide vane (51) tilts is consistent with impeller (2) sense of rotation.
2. multi-wing centrifugal fan according to claim 1, is characterized in that, described guide vane (51) is plate blade, and guide vane (51) is 45 °≤θ≤85 ° with the angle of the Transverse plane of guide vane device (5).
3. multi-wing centrifugal fan according to claim 2, is characterized in that, described guide vane (51) is 60 °≤θ≤75 ° with the angle of the Transverse plane of guide vane device (5).
4. multi-wing centrifugal fan according to claim 1, is characterized in that, the outer surface of described wheel hub (52) is sphere.
5. multi-wing centrifugal fan according to claim 1, is characterized in that, the outer surface of described wheel hub (52) is plane, and wheel hub (52) offers several vent holes (521).
6. multi-wing centrifugal fan according to claim 1, is characterized in that, described motor (4) is fixed in spiral case (1).
7. according to the multi-wing centrifugal fan described in claim 1 to 6 any one, it is characterized in that, the air intake passage (11) of described spiral case (1) is provided with air inlet ring (3), air inlet ring (3) is positioned at the periphery of guide vane device (5), it is upper that air inlet ring (3) is fixed on spiral case (1), and guide vane (51) is connected with air inlet ring (3) away from one end of wheel hub (52).
8. multi-wing centrifugal fan according to claim 7, is characterized in that, described guide vane device (5) is formed in one with air inlet ring (3).
9. according to the multi-wing centrifugal fan described in claim 1 to 6 any one, it is characterized in that, the air intake passage (11) of described spiral case (1) is provided with air inlet ring (3), air inlet ring (3) is positioned at the periphery of guide vane device (5), the periphery of described guide vane device (5) is also provided with connecting ring (6), it is upper that connecting ring (6) is fixed on spiral case (1), and guide vane (51) is connected with connecting ring (6) away from one end of wheel hub (52).
10. multi-wing centrifugal fan according to claim 9, is characterized in that, described guide vane device (5) is formed in one with connecting ring (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420479691.3U CN203978930U (en) | 2014-08-22 | 2014-08-22 | A kind of multi-wing centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420479691.3U CN203978930U (en) | 2014-08-22 | 2014-08-22 | A kind of multi-wing centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203978930U true CN203978930U (en) | 2014-12-03 |
Family
ID=51976382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420479691.3U Active CN203978930U (en) | 2014-08-22 | 2014-08-22 | A kind of multi-wing centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203978930U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179728A (en) * | 2014-08-22 | 2014-12-03 | 广东海信家电有限公司 | Multi-wing centrifugal fan |
| CN107795523A (en) * | 2016-09-05 | 2018-03-13 | 博世电动工具（中国）有限公司 | Air deflector and the electric tool for including it |
| CN110017302A (en) * | 2018-01-10 | 2019-07-16 | 青岛海尔智慧厨房电器有限公司 | Blower and kitchen ventilator |
| CN110439864A (en) * | 2018-05-04 | 2019-11-12 | 宁波方太厨具有限公司 | A kind of air inlet collector and the centrifugal blower with the collector |
| CN113153810A (en) * | 2021-05-26 | 2021-07-23 | 广东顺威精密塑料股份有限公司 | Double-rotation-direction centrifugal impeller |
-
2014
- 2014-08-22 CN CN201420479691.3U patent/CN203978930U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179728A (en) * | 2014-08-22 | 2014-12-03 | 广东海信家电有限公司 | Multi-wing centrifugal fan |
| CN107795523A (en) * | 2016-09-05 | 2018-03-13 | 博世电动工具（中国）有限公司 | Air deflector and the electric tool for including it |
| CN110017302A (en) * | 2018-01-10 | 2019-07-16 | 青岛海尔智慧厨房电器有限公司 | Blower and kitchen ventilator |
| CN110439864A (en) * | 2018-05-04 | 2019-11-12 | 宁波方太厨具有限公司 | A kind of air inlet collector and the centrifugal blower with the collector |
| CN113153810A (en) * | 2021-05-26 | 2021-07-23 | 广东顺威精密塑料股份有限公司 | Double-rotation-direction centrifugal impeller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104179728A (en) | Multi-wing centrifugal fan | |
| CN203978930U (en) | A kind of multi-wing centrifugal fan | |
| CN103158531B (en) | There is the vehicle of the drafting apparatus of band heat exchanger | |
| CN204646777U (en) | Radial flow impeller and fan unit | |
| CN207080384U (en) | Tube-axial fan | |
| CN104343725B (en) | A kind of MCL compressor models level and its design method | |
| CN104747501B (en) | Centrifugal fan for the device including refrigerator | |
| CN105508265B (en) | A kind of novel multi-wing centrifugal fan | |
| WO2015139491A1 (en) | Air-outlet protection structure, outdoor unit of air conditioner and design method for air-outlet protection structure | |
| CN104165158A (en) | Centrifugal fan of extractor hood | |
| CN104350308B (en) | There is axle and be placed in decelerator on axle, blower fan in fan shroud | |
| CN106640763A (en) | Air inlet ring and centrifugal fan comprising same | |
| CN203848360U (en) | Draught fan structure of extractor hood capable of forming man-made tornado | |
| CN204200679U (en) | Centrifugal blower and there is the air conditioner of this centrifugal blower | |
| CN105020757A (en) | Extractor hood fan structure capable of forming man-made tornado | |
| CN204003615U (en) | A kind of spiral case of centrifugal blower | |
| CN204327595U (en) | Small-sized fan used for respirators | |
| CN202520657U (en) | Double-volute-tongue fan | |
| CN205937218U (en) | Fan flabellum and fan unit | |
| CN203272238U (en) | Impeller, fan and snow blowing vehicle | |
| CN204082659U (en) | A kind of centrifugal blower of range hood | |
| CN204250376U (en) | A kind of Submerged Inlet structure of aircraft | |
| CN203297148U (en) | Through-flow fan for air conditioner capable of effectively improving fan performance | |
| CN206957994U (en) | Boosting stream centrifugal blower | |
| CN205689489U (en) | A kind of centrifugation blade, centrifugal blower and air-conditioning equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |