CN104454664B - A kind of multi-wing centrifugal fan - Google Patents
A kind of multi-wing centrifugal fan Download PDFInfo
- Publication number
- CN104454664B CN104454664B CN201410690697.XA CN201410690697A CN104454664B CN 104454664 B CN104454664 B CN 104454664B CN 201410690697 A CN201410690697 A CN 201410690697A CN 104454664 B CN104454664 B CN 104454664B
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- China
- Prior art keywords
- spiral case
- impeller
- air
- blade
- flow
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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
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
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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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
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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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
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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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of multi-wing centrifugal fan, including spiral case and the impeller that is arranged in spiral case, the air inlet formed with centrifugal blower in the first end of the spiral case, the first end of the spiral case is provided with the air-ducting ring that air-flow is imported to the impeller, the impeller includes multiple blades, it is characterised in that：The blade is flushed close to the first end of the air inlet with the first end of the spiral case or the first end of the blade is extended outside the first end of the spiral case.By the way that the end set of blade is flushed or exceeded into the end with spiral case in air inlet, so that flowed from the air-flow of impeller outflow by the power of impeller to the air outlet of spiral case, the air-flow not being pushed outwardly by turbine centrifugal effect is not present in the axial direction, reduce backflow, also vortex will not be produced, reduces noise.
Description
Technical field
The present invention relates to a kind of blower fan, especially a kind of centrifugal blower of multiple wing type.
Background technology
Multi-wing centrifugal fan is one kind of centrifugal blower, generally comprises impeller, spiral case, motor and driving member, and it is by defeated
The mechanical energy entered, the impeller using high speed rotation will accelerate axially into the gas of impeller, then slow down, change direction, radially
Impeller is flowed out, is finally gone out by the air outlet of spiral case.
It is a kind of conventional centrifugal blower referring to Fig. 1, including spiral case 1 ', the impeller 2 ' being arranged in spiral case 1 ', Yi Jicong
The air-ducting ring 3 ' that the end face of spiral case 1 ' extends to the air inlet of impeller 2 ', due to being provided with air-ducting ring 3 ', so as to more preferable
Guiding air-flow entered from spiral case 1 ' is outside in impeller 2 '.But this centrifugal blower, be typically due to impeller air inlet and
Gap (on axial direction) between the end face of spiral case be present, after air-flow, which changes direction, radially to be flowed out from impeller, some can be through
The air inlet (return air) of impeller is drained back to by above-mentioned gap, has thereby resulted in the loss of air quantity so that the efficiency of centrifugal blower is significantly
Reduce.
Therefore, also have been disclosed that some solve the problems, such as the technical scheme of above-mentioned return air, such as Application No. at present
A kind of noise reduction blower for vehicle air conditioning inlet windproof loop device disclosed in 201310239371.0 Chinese patent application, including cover
The spiral case being located on impeller, air inlet and air outlet are provided with spiral case, and the edge of air inlet extends along spiral case internal protrusion
Form the first windproof ring, spiral case interior surface also projection is provided with the second windproof ring, this two-sided windproof ring can in air inlet and
Higher-pressure region is produced between spiral case so that the backflow wind of air inlet be difficult again by gap cooperation at, so as to reduce backflow wind-fall flow back to
Impeller；A kind of and for example energy-saving centrifugal fan disclosed in the Chinese patent of Application No. 201320078113.4, impeller with
Gap is there are between the casing of air inlet, it is oblique to be provided with a water conservancy diversion for the position relative with gap on the casing of air inlet
Plate, flow guiding inclined plate one end are fixed on air inlet casing, and the other end is set towards impeller direction, and impeller is arranged in spiral case, led
Stream swash plate can either effectively prevent air-flow frontal impact gap, and and can is out-of-date in flow guiding inclined plate and impeller inlet in air-flow high velocity stream
Between formed a relative negative pressuren zone, side pressure is poor before and after reducing gap, reduce leakage rate.
But above-mentioned this centrifugal blower, due to still suffering from the gap on axial direction between impeller and the air inlet of spiral case,
Even if stop gap by way of windproof ring or flow guiding inclined plate are set, but air-flow accelerates outflow from impeller radial direction air outlet
When, still have part and flow to gap, and in the space formed between the spiral case side wall and windproof ring (flow guiding inclined plate) in gap
Air-flow by the power of impeller, does not form negative pressuren zone, so as to cause air-flow endlessly in spiral case side wall and windproof ring (water conservancy diversion
Swash plate) between space in form vortex, thereby produce larger noise, while the leakage of air quantity is also difficult to have and significantly changed
It is kind.
The content of the invention
The technical problems to be solved by the invention are divulged information in view of the above-mentioned problems of the prior art, providing a kind of improve
Efficiency, the multi-wing centrifugal fan for reducing noise.
Technical scheme is used by the present invention solves above-mentioned technical problem：A kind of multi-wing centrifugal fan, including spiral case and
The impeller being arranged in spiral case, the air inlet formed with centrifugal blower in the first end of the spiral case, the first end of the spiral case
The air-ducting ring that air-flow is imported to the impeller is provided with, the impeller includes multiple blades, it is characterised in that：The blade is close
The first end of the air inlet flushes with the first end of the spiral case or the first end of the blade extends the of the spiral case
Outside one end.
In order to further reduce the loss of air quantity and pressure, diametrically have between the first end and impeller of the spiral case
First gap, the first end of the radial outside of the air-ducting ring and the spiral case are fixed, the radially inner side extension of the air-ducting ring
Into the impeller, formed with being directed away from the outer of spiral case direction protrusion between the radial outside and radially inner side of the air-ducting ring
Convex portion.Because air-ducting ring, spiral case and impeller together form mazy space, after air-flow enters from the first gap, first outwards
Convex portion is flowed, and is returned again to after shock, it is difficult to which the dynamic end ring position from impeller enters again.
In order to strengthen the intensity of spiral case, the axial outward bending in first end inner side of the spiral case, the impeller also includes setting
The end ring in the blade first end is put, first gap is formed in the bending part of the spiral case and the end ring of the impeller
Between.
In order to avoid also entering in the return air away from air inlet one end, the impeller including being arranged on the blade away from described in
Wind loop on the outside of second end in air port, between the second end of the second end and the spiral case away from the air inlet of the blade
There is the second gap in the axial direction, the wind loop is located in second gap.
Compared with prior art, the advantage of the invention is that：By air inlet by the end set of blade into and snail
The end of shell flushes or exceeded so that flowed from the air-flow of impeller outflow by the power of impeller to the air outlet of spiral case,
The air-flow not being pushed outwardly by turbine centrifugal effect is not present in the axial direction, reduces backflow, will not also produce vortex, reduce
Noise；And labyrinth type space is formed between air-ducting ring, spiral case and impeller, airflow reflux is avoided to impeller；So as to effectively solve
The entrance air quantity of centrifugal blower, blast leakage, and vortex noise problem, reduce flow and the pressure loss, improve
The drafting efficiency of centrifugal blower.
Brief description of the drawings
Fig. 1 is the sectional view of the centrifugal blower of prior art；
Fig. 2 is the structural representation of the centrifugal blower of the present invention；
Fig. 3 is the sectional view of the centrifugal blower of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing embodiment.
Referring to Fig. 1 and Fig. 2, a kind of multi-wing centrifugal fan, including spiral case 1 and the impeller 2 that is arranged in spiral case 1.
Impeller 2 includes end ring 21, wheel disc 22 and the multiple blades 23 being arranged between end ring 21 and wheel disc 22, impeller 2
Wheel disc 21 on be provided with driving impeller 2 rotate motor 3.The molded line of blade 23 is the multi-section circular arc of more diameters, can cause leaf
Road interior air-flow realizes uniformly accelerated motion, considerably reduces Ye Daonei and produces flow separation or reduce the degree of flow separation.
The air inlet of the centrifugal blower formed in the first end of spiral case 1, the first end of blade 23 and the first of spiral case 1
End flushes, and for the limitation of manufacturing process, flushing herein refers to error within ± 5mm；Or the first end of blade 23 can
To extend the first end of spiral case 1.The air-ducting ring 4 for importing air-flow in impeller 2, air-ducting ring 4 are provided with the first end of spiral case 1
Annularly, the axially external fixation of first end at the radial outside edge of air-ducting ring 4 and spiral case 1, the radial inside edge of air-ducting ring 4
Extend in end ring 21.
Axial outward bending on the inside of the first end of spiral case 1, diametrically there is the between the bending part and end ring 21
One gap 11, formed with the male part for being directed away from the direction of spiral case 1 protrusion between the radial outside and radially inner side of air-ducting ring 4
41, male part 41 is spaced apart without being contacted with end ring 21 with end ring 21, so as to which end ring 21 and male part 41 do not interfere with each other.Evagination
The gap 11 of portion 41 and first is relative, thus with spiral case 1, impeller 2 end ring 21 together with form mazy space.
When centrifugal blower works, accelerate to become backward, from the blade 23 of impeller 2 in impeller 2 by the air-flow that air inlet enters
Air outlet at radially flow out, because the first end of blade 23 and the first end of spiral case 1 flush or exceed, therefore, close to blade
23 first end and the air-flow of the first end outflow of spiral case 1 are flowed by the power of impeller 2 to the air outlet of spiral case 1, axle
The air-flow not being pushed outwardly by the centrifugal action of impeller 2 is not present upwards, reduces backflow, will not also produce vortex, reduce and make an uproar
Sound；And even if there is a small amount of air-flow to enter the space that air-ducting ring 4, spiral case 1 and impeller 2 be collectively forming by the first gap 11
It is interior, and because the space is mazy space, air-flow first outwards flow by convex portion 41, is returned again to after shock, it is difficult to dynamic again
Enter at the end ring 21 of impeller 2.Thus centrifugal fan structure of the invention can be substantially reduced due to vortex and caused noise,
And return air is essentially eliminated, reduces the loss of flow and pressure so that the drafting efficiency of centrifugal blower greatly improves.
Had herein few there is the second gap 12 in the axial direction between second end of blade 23 and the second end of spiral case 1
The return air of amount, therefore, impeller 2 also includes being arranged on the wind loop 24 on the outside of the second end of blade 23, wind loop 24 is located at second
In gap 12, the second gap 12 is filled with, avoids and impeller 2 is back to by the second gap 12 by the air-flow that impeller 2 radially flows out
It is interior.
Claims (4)
1. a kind of multi-wing centrifugal fan, including spiral case (1) and the impeller (2) that is arranged in spiral case (1), the of the spiral case (1)
Air inlet formed with centrifugal blower on one end, the first end of the spiral case (1) is provided with imports the impeller (2) by air-flow
Air-ducting ring (4), the impeller (2) include multiple blades (23), it is characterised in that：The blade (23) is close to the air inlet
First end flushes with the first end of the spiral case (1) or the first end of the blade (23) extends the first of the spiral case (1)
End is outer.
2. multi-wing centrifugal fan as claimed in claim 1, it is characterised in that：The first end and impeller (2) of the spiral case (1) it
Between diametrically there are the first gap (11), the first end of the radial outside and the spiral case (1) of the air-ducting ring (4) is fixed,
The radially inner side of the air-ducting ring (4) is extended in the impeller (2), the radial outside and radially inner side of the air-ducting ring (4)
Between formed be directed away from spiral case (1) direction protrusion male part (41).
3. multi-wing centrifugal fan as claimed in claim 2, it is characterised in that：On the inside of the first end of the spiral case (1) axially to
Outer bending, the impeller (2) also include the end ring (21) for being arranged on the blade (23) first end, the first gap (11) shape
Into between the bending part of the spiral case (1) and the end ring (21) of the impeller (2).
4. such as multi-wing centrifugal fan according to any one of claims 1 to 3, it is characterised in that：The impeller (2) also includes setting
Put the blade (23) away from the air inlet the second end on the outside of wind loop (24), the second end of the blade (23) and
The spiral case (1) has the second gap (12) in the axial direction between the second end away from the air inlet, the wind loop (24)
In second gap (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410690697.XA CN104454664B (en) | 2014-11-26 | 2014-11-26 | A kind of multi-wing centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410690697.XA CN104454664B (en) | 2014-11-26 | 2014-11-26 | A kind of multi-wing centrifugal fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104454664A CN104454664A (en) | 2015-03-25 |
| CN104454664B true CN104454664B (en) | 2017-12-01 |
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ID=52901243
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410690697.XA Active CN104454664B (en) | 2014-11-26 | 2014-11-26 | A kind of multi-wing centrifugal fan |
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| Country | Link |
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| CN (1) | CN104454664B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847694B (en) * | 2015-05-04 | 2017-03-01 | 亿昇(天津)科技有限公司 | The centrifugal blower impeller attachment device of automatic stabilisation air quantity |
| KR20180054621A (en) * | 2015-09-18 | 2018-05-24 | 일렉트로룩스 어플라이언스 아크티에볼레그 | Portable air conditioner |
| CN105387587A (en) * | 2015-12-01 | 2016-03-09 | 珠海格力电器股份有限公司 | Air duct assembly and air conditioner with same |
| CN106438491A (en) * | 2016-07-18 | 2017-02-22 | 珠海格力电器股份有限公司 | Flow guide ring, centrifugal fan and air conditioner |
| CN107339259B (en) * | 2017-04-11 | 2023-09-15 | 宁波方太厨具有限公司 | Multi-wing centrifugal fan |
| TWI681130B (en) * | 2018-11-26 | 2020-01-01 | 建準電機工業股份有限公司 | Fan shell and fan wheel combination structure and fan shell |
| CN111237249B (en) * | 2018-11-28 | 2021-01-15 | 宁波方太厨具有限公司 | Fan system of range hood |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5478201A (en) * | 1994-06-13 | 1995-12-26 | Carrier Corporation | Centrifugal fan inlet orifice and impeller assembly |
| CN201944911U (en) * | 2010-11-25 | 2011-08-24 | 宁波方太厨具有限公司 | Range hood capable of effectively reducing noise and stabilizing flow |
| CN202360466U (en) * | 2011-12-15 | 2012-08-01 | 广东恒业电器有限公司 | Multi-blade centrifugal fan with multifunctional flow guiding device |
| CN204284016U (en) * | 2014-11-26 | 2015-04-22 | 宁波方太厨具有限公司 | A kind of multi-wing centrifugal fan |
-
2014
- 2014-11-26 CN CN201410690697.XA patent/CN104454664B/en active Active
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| Publication number | Publication date |
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| CN104454664A (en) | 2015-03-25 |
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