CN106321510A - Backward centrifugal impeller - Google Patents
Backward centrifugal impeller Download PDFInfo
- Publication number
- CN106321510A CN106321510A CN201610798158.7A CN201610798158A CN106321510A CN 106321510 A CN106321510 A CN 106321510A CN 201610798158 A CN201610798158 A CN 201610798158A CN 106321510 A CN106321510 A CN 106321510A
- Authority
- CN
- China
- Prior art keywords
- groove
- teeth groove
- centrifugal impeller
- unit
- backward centrifugal
- 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.)
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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
- 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
- F04D29/66—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
Abstract
The embodiment of the invention provides a backward centrifugal impeller. Groove shapes which are arranged in a certain sequence are formed in the inlet end of an impeller cover. The speed of air flow at gaps between the inlet end and an air guiding ring is reduced; generation of eddy is inhibited; the air flow leaking from the gaps is discharged in a segmented manner; and mixed flow is not generated, and thus the purpose of noise reduction is achieved. According to the technical scheme, the backward centrifugal impeller comprises the impeller cover, an impeller disc and vanes located between the impeller cover and the impeller disc. The backward centrifugal impeller is characterized in that the inlet end of the impeller cover is provided with multiple teeth and grooves which are arranged at intervals; each tooth and the corresponding adjacent groove form a tooth-groove unit; and at the outer rim of each tooth-groove unit, the width ratio of the corresponding groove to the corresponding tooth ranges from 0.8 to 1.2, and the ratio of the width of the corresponding groove to the depth of the corresponding groove ranges from 1 to 1.5.
Description
Technical field
The present embodiments relate to blower fan technical field, be specifically related to a kind of backward centrifugal impeller.
Background technology
Centrifugal blower for being transformed into circumference air-flow by the air-flow that axially arrives, and centrifugal blower fan blade wheel is the weight of centrifugal blower
Want parts.In prior art, backward centrifugal blower is widely used in the field higher to acoustic quality requirement.Along with air force
That learns is continuous progressive, and the impeller research and development of various blower fans are all using more novel design to obtain higher efficiency, lower making an uproar
Sound, higher acoustic quality.For backward centrifugal blower, efficiency and noise repel each other often, and high efficiency often will band
Carry out higher noise.
Fig. 1 is the structure of backward centrifugal impeller of the prior art, including wheel cap 1, wheel disc 2 and be positioned at wheel cap 1 and wheel disc 2
Between blade 3, the arrival end of wheel cap 1 is smooth circular arc enclosed construction, air-ducting ring stretch into wheel cap 1 and and wheel cap 1 between have
Gap, gap portion just has bigger air velocity, thus will produce loud noise at gap portion and also may produce
Raw howling.
Summary of the invention
The embodiment of the present invention provides a kind of backward centrifugal impeller, opens certain tactic groove shape at wheel cap arrival end,
Reduce the air velocity of arrival end and air-ducting ring gap location and suppress eddy current to produce, making to discharge from the air-flow segmentation of clearance leakage,
Do not produce mixed flow, thus play the purpose reducing noise.
The technical scheme of a kind of backward centrifugal impeller of the embodiment of the present invention includes:
Wheel cap, wheel disc and the blade between described wheel cap and described wheel disc, it is characterised in that described wheel cap arrival end
It is provided with some spaced teeth and groove；Each adjacent described tooth and described groove constitute a teeth groove unit, at described teeth groove
The outer edge of unit, well width is 0.8～1.2 with the ratio of tooth width, and described well width is 1～1.5 with the ratio of groove depth.
Preferably, after above-mentioned in the technical scheme of centrifugal impeller, in described teeth groove unit, the two sides of described groove
The angle of extended line of tangent line be 0 °≤α≤120 °.
Preferably, after above-mentioned in the technical scheme of centrifugal impeller, in described teeth groove unit, the two sides of described groove
In any one or two be inclined plane, described inclined plane is relative to described groove outward flange place planar tilt.
Preferably, after above-mentioned in the technical scheme of centrifugal impeller, in described teeth groove unit, the two sides of described groove
It is inclined plane, and the angle of the extended line of the tangent line of the two sides of described groove is 0 °≤α≤45 °.
Preferably, after above-mentioned in the technical scheme of centrifugal impeller, several described teeth groove unit are divided into several
Teeth groove combines, and the described teeth groove unit in the combination of each described teeth groove is different.
Preferably, after above-mentioned in the technical scheme of centrifugal impeller, each described teeth groove combines by two teeth groove unit
Composition, in the outer edge of described teeth groove unit, the well width of one of them described teeth groove unit is 1.0 with the ratio of tooth width,
The well width of another described teeth groove unit is 1.1 with the ratio of tooth width.
Preferably, after above-mentioned in the technical scheme of centrifugal impeller, at the outer edge of described teeth groove unit, described tooth
Thickness is 0.5～0.8 with the ratio of described well width.
Preferably, after above-mentioned in the technical scheme of centrifugal impeller, described wheel cap arrival end wall thickness is 3mm～8mm.
Technique scheme is used to provide the benefit that:
The backward centrifugal impeller of the present invention opens certain tactic groove shape at wheel cap arrival end, reduces arrival end and leads
Air velocity and the suppression eddy current of solar or lunar halo gap location produce, and make to discharge from the air-flow segmentation of clearance leakage, do not produce mixed flow, thus
Play the purpose reducing noise.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to
The accompanying drawing provided obtains other accompanying drawing.
Fig. 1 is the structure chart of a kind of backward centrifugal impeller of the prior art；
Fig. 2 is the mated condition schematic diagram of backward centrifugal impeller of the prior art and air-ducting ring；
Fig. 3 is the structure chart of a kind of backward centrifugal impeller in the present embodiment；
Fig. 4 is the structure chart of an embodiment of the teeth groove of a kind of backward centrifugal impeller in the present embodiment；
Fig. 5 is the structure chart of another embodiment of the teeth groove of a kind of backward centrifugal impeller in the present embodiment；
Fig. 6 is the structure chart of another embodiment of the teeth groove of a kind of backward centrifugal impeller in the present embodiment；
Fig. 7 is the structure chart of another embodiment of the teeth groove of a kind of backward centrifugal impeller in the present embodiment；
Fig. 8 is the structure chart of another embodiment of the teeth groove of a kind of backward centrifugal impeller in the present embodiment；
Fig. 9 is the thickness schematic diagram of the sawtooth of a kind of backward centrifugal impeller in the present embodiment.
Detailed description of the invention
The embodiment of the present invention provides a kind of backward centrifugal impeller, opens certain tactic groove shape at wheel cap arrival end,
Reduce the air velocity of arrival end and air-ducting ring gap location and suppress eddy current to produce, making to discharge from the air-flow segmentation of clearance leakage,
Do not produce mixed flow, thus play the purpose reducing noise.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
As shown in Figures 2 to 5, the backward centrifugal impeller in the embodiment of the present invention includes wheel cap 1, wheel disc 2 and is positioned at wheel cap 1
And the blade 3 between wheel disc 2；
The arrival end of wheel cap 1 is provided with some spaced teeth 5 and groove 4, is provided with a groove 4 between each two tooth 5, each
Adjacent tooth 5 and groove 4 constitute a teeth groove unit；
In any one teeth groove unit, teeth groove unit edge i.e. at teeth groove unit near the one of wheel cap arrival end
Side, the ratio of well width L1 and tooth width L2 is 0.8～1.2, and well width L1 is 1～1.5 with the ratio of groove depth L3.
During backward centrifugal impeller in the present embodiment and air-ducting ring 6 support the use, as in figure 2 it is shown, air-ducting ring 6 is stretched
Enter wheel cap 1 and and wheel cap 1 between there is space H, when external air flow enters backward centrifugal impeller through air-ducting ring 6, air-flow is from leading
Solar or lunar halo 6 can leak sub-fraction air-flow from space H after entering, and the arrival end at wheel cap 1 is offered groove 4, can be made leakage current not
Discharge through the space H that windage is bigger and discharge from groove 4, thus reduce pneumatic noise.
About the proportionate relationship of well width, the proportionate relationship of tooth width and well width Yu groove depth, the present inventor is carried out
Crossing test of many times, table one and table two is relevant test data.
The ratio (ensureing same groove depth) of table one well width and tooth width
The ratio (ensureing same tooth width) of table two well width and groove depth
When well width is smaller, leakage current wind speed is relatively big, has bigger noise；When well width is bigger, gas
Flow leakage quantity too big, will also result in bigger noise.According to test data shown in upper table, it is known that: when groove depth keeps constant,
During the ratio ＜ 0.8 of well width and tooth width, level of noise > 77.1, during the ratio ＞ 1.2 of well width and tooth width, level of noise > 76.7,
But when the ratio of well width with tooth width is 0.8～1.2, level of noise is 74.7-75.1, and effect is best.
When groove depth is less, air-flow gap to be first passed through is again from groove leakage current, and gap windage at this moment is relatively big, air-flow
Have loud noise；When groove depth is bigger, air-flow needs not move through gap and just leaks discharge, and at this moment leakage rate is relatively big, air-flow
Noise is big.When well width keeps constant, during the ratio ＜ 1 of well width and groove depth, level of noise > 75.1；Well width and groove depth
Ratio ＞ 1.5 time, level of noise > 75.1；When the ratio of well width and groove depth is 1～1.5, level of noise is 74.7-75.1, and effect is
Good.
As shown in Figure 6 and Figure 7, in teeth groove unit, the angle of the extended line of the tangent line of the two sides of groove be 0 °≤α≤
120 °, further, in this teeth groove unit, any one or two in the two sides of groove are inclined plane, inclined plane relative to
Groove outward flange place planar tilt.Preferably, as shown in the table, in teeth groove unit, the two sides of groove are inclined plane, and groove
The angle of extended line of tangent line of two sides when being 0 °≤α≤45 °, level of noise relative reduction.Following table is relevant test number
According to.
Level of noise (ensureing same well width) corresponding to the different angle of table three
After above-mentioned in centrifugal impeller, as shown in Figure 8, several teeth groove unit are divided into the combination of several teeth groove, often
One teeth groove combination includes the teeth groove unit that the ratio of at least two well width and tooth width differs, concretely one be well width and
The ratio of tooth width is 1.0, and the another kind of ratio for well width with tooth width is 1.1.The present inventor carried out test of many times, and following table is
Relevant test data.
| Type | The ratio of well width and groove depth | Level of noise |
| Same ratio | 1.0 | 75.2 |
| Combination ratio | 1.0 and 1.1 | 74.9 |
Level of noise corresponding to table four different teeth groove unit
After above-mentioned in centrifugal impeller, transverse tooth thickness degree is 0.5～0.8 with the ratio of well width L1, and the present inventor is carried out too much
Secondary test, following table is relevant test data.
The impact of the comparison level of noise of table five transverse tooth thickness degree and well width
After above-mentioned in centrifugal impeller, the most specifically limiting groove 4 and the shape of tooth 5, the shape such as tooth 5 can be for Fig. 4 institute
The rectangle shown, it is also possible to for the class rectangle (i.e. bottom surface is arc) shown in Fig. 5, can trapezoidal for shown in Fig. 6, it is also possible to for figure
Class shown in 7 trapezoidal (i.e. bottom surface is arc).
As it is shown in figure 9, wheel cap arrival end wall thickness L4 is 3mm～8mm, the present inventor is by the thickness to wheel cap arrival end wall thickness
Degree carries out test of many times, and following table is relevant test data.
Above example only in order to technical scheme to be described, is not intended to limit；Although with reference to previous embodiment
The present invention is described in detail, it will be understood by those within the art that: it still can be to aforementioned each enforcement
Technical scheme described in example is modified, or wherein portion of techniques feature is carried out equivalent；And these amendment or
Replace, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (8)
1. a backward centrifugal impeller, including wheel cap, wheel disc and the blade between described wheel cap and described wheel disc, its feature
Being, described wheel cap arrival end is provided with some spaced teeth and groove；Each adjacent described tooth and described groove constitute one
Teeth groove unit, in the outer edge of described teeth groove unit, well width is 0.8～1.2 with the ratio of tooth width, described well width and groove
The ratio of the degree of depth is 1～1.5.
Backward centrifugal impeller the most according to claim 1, it is characterised in that in described teeth groove unit, the two of described groove
The angle of the extended line of the tangent line of side is 0 °≤α≤120 °.
Backward centrifugal impeller the most according to claim 2, it is characterised in that in described teeth groove unit, the two of described groove
Any one or two in side are inclined plane, and described inclined plane is relative to described groove outward flange place planar tilt.
Backward centrifugal impeller the most according to claim 3, it is characterised in that in described teeth groove unit, the two of described groove
Side is inclined plane, and the angle of the extended line of the tangent line of the two sides of described groove is 0 °≤α≤45 °.
Backward centrifugal impeller the most according to any one of claim 1 to 4, it is characterised in that several described teeth groove lists
Unit is divided into the combination of several teeth groove, and the described teeth groove unit in the combination of each described teeth groove is different.
Backward centrifugal impeller the most according to claim 5, it is characterised in that each described teeth groove combines by two teeth groove lists
Unit's composition, in the outer edge of described teeth groove unit, the well width of one of them described teeth groove unit with the ratio of tooth width is
1.0, the well width of another described teeth groove unit is 1.1 with the ratio of tooth width.
Backward centrifugal impeller the most according to claim 1, it is characterised in that in the outer edge of described teeth groove unit, institute
The ratio stating transverse tooth thickness degree and described well width is 0.5～0.8.
Backward centrifugal impeller the most according to claim 7, it is characterised in that described wheel cap arrival end wall thickness be 3mm～
8mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610798158.7A CN106321510B (en) | 2016-08-31 | 2016-08-31 | Backward centrifugal impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610798158.7A CN106321510B (en) | 2016-08-31 | 2016-08-31 | Backward centrifugal impeller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106321510A true CN106321510A (en) | 2017-01-11 |
| CN106321510B CN106321510B (en) | 2020-03-06 |
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ID=57787860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610798158.7A Active CN106321510B (en) | 2016-08-31 | 2016-08-31 | Backward centrifugal impeller |
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| Country | Link |
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| CN (1) | CN106321510B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109611356A (en) * | 2018-11-30 | 2019-04-12 | 泛仕达机电股份有限公司 | A kind of backward centrifugal blower |
| CN112628199A (en) * | 2021-01-07 | 2021-04-09 | 泛仕达机电股份有限公司 | Centrifugal wind wheel capable of reducing resistance and noise |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2322772A1 (en) * | 1972-05-15 | 1973-11-29 | Ahlstroem Oy | SEWAGE PUMP OD DGL |
| CN202718924U (en) * | 2012-08-07 | 2013-02-06 | 讯凯国际股份有限公司 | Fan and fan framework of the same |
| DE202009018770U1 (en) * | 2009-02-12 | 2013-03-07 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Radial or diagonal fan wheel |
| CN104279193A (en) * | 2013-07-12 | 2015-01-14 | Lg电子株式会社 | Centrifugal blower and air conditioner using the same |
| JP2015190415A (en) * | 2014-03-28 | 2015-11-02 | 株式会社富士通ゼネラル | centrifugal blower |
| CN205190322U (en) * | 2015-10-26 | 2016-04-27 | 珠海格力电器股份有限公司 | Centrifugation fan blade and centrifugal fan |
| CN105697415A (en) * | 2016-04-14 | 2016-06-22 | 浙江亿利达风机股份有限公司 | Backward centrifugal wind wheel |
-
2016
- 2016-08-31 CN CN201610798158.7A patent/CN106321510B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2322772A1 (en) * | 1972-05-15 | 1973-11-29 | Ahlstroem Oy | SEWAGE PUMP OD DGL |
| DE202009018770U1 (en) * | 2009-02-12 | 2013-03-07 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Radial or diagonal fan wheel |
| CN202718924U (en) * | 2012-08-07 | 2013-02-06 | 讯凯国际股份有限公司 | Fan and fan framework of the same |
| CN104279193A (en) * | 2013-07-12 | 2015-01-14 | Lg电子株式会社 | Centrifugal blower and air conditioner using the same |
| JP2015190415A (en) * | 2014-03-28 | 2015-11-02 | 株式会社富士通ゼネラル | centrifugal blower |
| CN205190322U (en) * | 2015-10-26 | 2016-04-27 | 珠海格力电器股份有限公司 | Centrifugation fan blade and centrifugal fan |
| CN105697415A (en) * | 2016-04-14 | 2016-06-22 | 浙江亿利达风机股份有限公司 | Backward centrifugal wind wheel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109611356A (en) * | 2018-11-30 | 2019-04-12 | 泛仕达机电股份有限公司 | A kind of backward centrifugal blower |
| CN112628199A (en) * | 2021-01-07 | 2021-04-09 | 泛仕达机电股份有限公司 | Centrifugal wind wheel capable of reducing resistance and noise |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106321510B (en) | 2020-03-06 |
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Address after: 528300 9 Daliang, five Shalong Shuncheng Road, Daliang, Shunde, Foshan, Guangdong Applicant after: Fanshida electromechanical Limited by Share Ltd Address before: 528300 two, Daliang Shuncheng South Road, five Daliang street, Shunde District, Foshan, Guangdong two Applicant before: FANS-TECH ELECTRIC CO., LTD. |
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