CN108180153A - A kind of centrifugal blower - Google Patents
A kind of centrifugal blower Download PDFInfo
- Publication number
- CN108180153A CN108180153A CN201711441848.8A CN201711441848A CN108180153A CN 108180153 A CN108180153 A CN 108180153A CN 201711441848 A CN201711441848 A CN 201711441848A CN 108180153 A CN108180153 A CN 108180153A
- Authority
- CN
- China
- Prior art keywords
- impeller
- spiral case
- ring
- shaped depression
- shroud
- 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.)
- Pending
Links
- 230000009467 reduction Effects 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 4
- 230000001788 irregular Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- 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
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
-
- 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
-
- 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
Abstract
The invention discloses a kind of centrifugal blowers, including motor, spiral case, the impeller being arranged on spiral case and the shroud being arranged on impeller, spiral case inner wall far from motor side is provided with one week ring-shaped depression, the diameter of the ring-shaped depression is more than the diameter of impeller, the present invention inhibits air-flow to be flowed near the shroud of impeller along the wall surface of spiral case, reduce the air-flow that impeller inlet is flowed back in the gap by impeller front disc and spiral case, so as to reach promotion fan efficiency, reduce the purpose of noise.
Description
Technical field
The present invention relates to centrifugal blower technical fields, and in particular to a kind of centrifugal blower.
Background technology
Fan for air conditioner on vehicle is centrifugal fan, and flowing of the gas in impeller is as shown in Figure 1, gas first passes through impeller
Entrance sucks, and then gas about turns 90 DEG C of runners for flowing through impeller blade composition, after gas obtains energy in the impeller of rotation
Outflow impeller enters spiral case, flowing of the gas in spiral case as shown in Fig. 2, the gas that spiral case throws away impeller concentrate, water conservancy diversion, from
Ventilation blower outlet discharge, after gas is thrown out of, the pressure of impeller center part reduces, and ambient atmos are by impeller front disc from wind turbine
Import sucking, continuously to car convey gas.
After gas leaves impeller, a part of air-flow is flowed to along spiral case wall surface near the shroud of impeller, this fraction leads to
It crosses behind the gap of impeller front disc and spiral case and flows back to impeller inlet, this is because gas is flow to from fan inlet up to impeller inlet
Static pressure reduces due to constantly overcoming flow resistance in the process, reaches fluid energy at shroud position than relatively low, causes
Adverse pressure gradient is generated in runner, so as to which backflow phenomenon occur at shroud position, the presence of these reflux, on the one hand to wind turbine
Whole efficiency has an impact, and disturbance on the other hand can also be caused to generate so as to cause secondary noise to inlet air flow.
Invention content
The technical problem to be solved in the present invention is to provide a kind of rational in infrastructure, centrifugal blower efficiency is promoted, reduces noise
Centrifugal blower.
The task of the present invention is what is completed in this way, a kind of centrifugal blower, including motor, spiral case, the leaf being arranged in spiral case
Take turns and be arranged on the shroud on impeller, it is characterised in that：Spiral case inner wall far from motor side is provided with one week ring-shaped depression,
The diameter of the ring-shaped depression is more than the diameter of impeller.
Preferably, the ring-shaped depression is by first surface, third curved surface and for connecting first surface and third curved surface
The second curved surface composition, the cross section of ring-shaped depression is irregular U-shaped, first surface and the second curved surface in three curved surfaces
Gap is C-shaped with the end edge shape of shroud.
Preferably, the ring-shaped depression surface is provided with the noise reduction hole of circular array arrangement.
Preferably, the noise reduction hole is set on the second curved surface the end far from first surface and the second curved surface junction.
Preferably, the noise reduction hole is 4, aperture 2mm-10mm.
The present invention inhibits air-flow to be flowed near the shroud of impeller along the wall surface of spiral case, makes through impeller front disc and spiral case
The air-flow that impeller inlet is flowed back in gap reduces, and so as to reach promotion fan efficiency, reduces the purpose of noise.
Description of the drawings
Fig. 1 is flow schematic diagram of the gas in impeller in the prior art；
Fig. 2 is flow schematic diagram of the gas in spiral case in the prior art；
Fig. 3 is the structure diagram of the present invention；
Fig. 4 is the noise spectrum comparison diagram of the prior art and the present invention.
Drawing explanation：1st, impeller, 2, shroud, 3, spiral case, 4, noise reduction hole, 5, ring-shaped depression, 6, impeller eye, 7, C fonts
Gap, 8, motor.
Specific embodiment
With reference to attached drawing detailed description of the present invention technical solution, a kind of centrifugal blower including motor 8, spiral case 3, is arranged on
Impeller 1 in spiral case and the shroud 2 being arranged on impeller, the spiral case inner wall far from motor side are provided with one week ring-shaped depression
5, the diameter of the ring-shaped depression is more than the diameter of impeller, and the ring-shaped depression is by first surface, third curved surface and for even
Connect the second curved surface composition of first surface and third curved surface, the cross section of ring-shaped depression is irregular U-shaped, in three curved surfaces
First surface and the end edge shape of the second curved surface and shroud be C-shaped gap 7, the ring-shaped depression surface is provided in ring
The noise reduction hole 4 of shape array arrangement, the noise reduction hole are set on the second curved surface far from first surface and the second curved surface junction
The end of second curved surface, the noise reduction hole are 4, aperture 2mm-10mm.
The present invention increases ring-shaped depression on the basis of existing spiral case, and ring-shaped depression is made of three curved surfaces, on the one hand annular
Recess is inside air-flow guiding spiral case flow along spiral case wall surface toward shroud direction, another aspect ring-shaped depression and shroud wall surface
Forming a C fonts gap prevents air-flow from flowing back to impeller eye 6, and ring-shaped depression circumferencial direction sets noise reduction hole, ring-shaped depression
Although setting can prevent major part air-flow flow back to impeller eye along spiral case wall surface, be limited to ring-shaped depression and shroud there are still
Gap has fraction and flows back to impeller by C fonts gap, by setting noise reduction hole so that this fraction passes through noise reduction hole
Spiral case is flowed out, so as to further air-flow be prevented to flow back to impeller by C fonts gap, by the way that air-flow is inhibited to flow back to impeller by shroud
On the one hand entrance can improve fan efficiency, on the other hand can eliminate two because of the secondary disturbance generation to inlet air flow of shroud
Secondary noise, with reference to attached drawing 4, the spiral case noise spectrum curve that the front and rear noise pattern of spiral case optimization can be seen that the present invention is small
In the noise using prior art spiral case.
Have been shown and described above the basic principle of the present invention, main feature and advantage, do not depart from spirit of the invention and
Under the premise of range, the present invention also has various changes and modifications, these changes and improvements both fall within claimed invention
Range.
Claims (5)
1. a kind of centrifugal blower, including motor, spiral case, the impeller being arranged in spiral case and the shroud being arranged on impeller,
It is characterized in that：Spiral case inner wall far from motor side is provided with one week ring-shaped depression, and the diameter of the ring-shaped depression is more than impeller
Diameter.
2. a kind of centrifugal blower according to claim 1, it is characterised in that：The ring-shaped depression is by first surface, third
Curved surface and for connecting the second curved surface of first surface and third curved surface composition, the cross section of ring-shaped depression is irregular U
Font, first surface and the end edge shape of the second curved surface and shroud in three curved surfaces are C-shaped gap.
3. a kind of centrifugal blower according to claim 2, it is characterised in that：The ring-shaped depression surface is provided in a ring
The noise reduction hole of array arrangement.
4. a kind of centrifugal blower according to claim 3, it is characterised in that：The noise reduction hole is set on the second curved surface far
From first surface and the end of the second curved surface junction.
5. a kind of centrifugal blower according to claim 3, it is characterised in that：The noise reduction hole is 4, aperture 2mm-
10mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711441848.8A CN108180153A (en) | 2017-12-27 | 2017-12-27 | A kind of centrifugal blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711441848.8A CN108180153A (en) | 2017-12-27 | 2017-12-27 | A kind of centrifugal blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108180153A true CN108180153A (en) | 2018-06-19 |
Family
ID=62547545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711441848.8A Pending CN108180153A (en) | 2017-12-27 | 2017-12-27 | A kind of centrifugal blower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108180153A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022143171A1 (en) * | 2021-01-04 | 2022-07-07 | 青岛海尔滚筒洗衣机有限公司 | Centrifugal fan and washing apparatus provided with same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101165357A (en) * | 2006-10-19 | 2008-04-23 | 三菱重工业株式会社 | Centrifugal fan |
| CN201582209U (en) * | 2009-12-10 | 2010-09-15 | 湖南天雁机械有限责任公司 | Antisurge structure of compressor volute of turbocharger |
| CN105051374A (en) * | 2013-03-13 | 2015-11-11 | 松下知识产权经营株式会社 | Air blower |
| JP2016106197A (en) * | 2016-03-15 | 2016-06-16 | ミネベア株式会社 | Centrifugal fan |
| CN207750266U (en) * | 2017-12-27 | 2018-08-21 | 豫新汽车空调股份有限公司 | A kind of centrifugal blower |
-
2017
- 2017-12-27 CN CN201711441848.8A patent/CN108180153A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101165357A (en) * | 2006-10-19 | 2008-04-23 | 三菱重工业株式会社 | Centrifugal fan |
| CN201582209U (en) * | 2009-12-10 | 2010-09-15 | 湖南天雁机械有限责任公司 | Antisurge structure of compressor volute of turbocharger |
| CN105051374A (en) * | 2013-03-13 | 2015-11-11 | 松下知识产权经营株式会社 | Air blower |
| JP2016106197A (en) * | 2016-03-15 | 2016-06-16 | ミネベア株式会社 | Centrifugal fan |
| CN207750266U (en) * | 2017-12-27 | 2018-08-21 | 豫新汽车空调股份有限公司 | A kind of centrifugal blower |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022143171A1 (en) * | 2021-01-04 | 2022-07-07 | 青岛海尔滚筒洗衣机有限公司 | Centrifugal fan and washing apparatus provided with same |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |