CN107975497A - A kind of centrifugal blower volute - Google Patents
A kind of centrifugal blower volute Download PDFInfo
- Publication number
- CN107975497A CN107975497A CN201710369371.0A CN201710369371A CN107975497A CN 107975497 A CN107975497 A CN 107975497A CN 201710369371 A CN201710369371 A CN 201710369371A CN 107975497 A CN107975497 A CN 107975497A
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- China
- Prior art keywords
- helix
- angle
- spiral case
- spiral
- flare
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- 238000013461 design Methods 0.000 claims description 12
- 230000003068 static effect Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 3
- 230000008676 import Effects 0.000 description 3
- 241000237858 Gastropoda Species 0.000 description 1
- 241000237369 Helix pomatia Species 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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
- F04D29/40—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
- F04D29/66—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
- F04D29/663—Sound attenuation
Abstract
A kind of centrifugal blower volute, its spiral case inlet pressure include the start line AC and the end lines MN positioned at the molded line other end positioned at molded line one end, and the spiral case inlet pressure between start line AC and end lines MN is helix, it is characterised in that：The second helix DM, the first helix CD that helix includes the first helix CD being connected with start line AC and is connected with end lines MN is equiangular helical spiral, and the second helix DM is the tapered variable angle spiral of the angle of flare.The advantage of the invention is that：The centrifugal blower volute molded line by the first helix CD between start line AC and end lines MN by being designed to equiangular helical spiral, second helix DM is the tapered variable angle spiral of the angle of flare, reduce the side-to-side dimensions of spiral case, improve the fluency that spiral case internal gas flow is collected and passed through, it has been obviously improved maximum static pressure and the static pressure of effective wind rate section, realize and be issued to big spiral case effect in small size, while reduce aerodynamic noise, improve user experience.
Description
Technical field
The present invention relates to a kind of wind turbine, more particularly, to a kind of centrifugal blower volute.
Background technology
Centrifugal blower has obtained extensive reference with the advantages that its suction is big, noise is low, compact-sized in range hood.
Spiral case is one of core component of centrifugal blower, and it is to concentrate the gas for leaving impeller that it, which is acted on, is exported to volute outlet, and will
Dynamic pressure is changed into static pressure.The volute structure of existing centrifugal blower includes spiral case top plate, spiral case bottom plate and connection spiral case top plate, spiral case
Remaining molded line in addition to volute tongue position is consistent with spiral case bottom plate for the spiral case coaming plate of bottom plate, wherein spiral case top plate.Conventional volute design one
As carried out by a metatheory, have two it is assumed that i.e. flow parameter is uniformly distributed and spiral case interior air-flow is moved on hypothesis import circumference
Moment preserving is measured, the spiral case inlet pressure by unitary Theoretical Design is usually equiangular helical spiral.But actually due to the non-axis pair of volute shape
Claim, particularly the influence of volute tongue, can form a pressure field heterogeneous in impeller outlet, impeller outlet, i.e. snail will necessarily be made
Shell inlet flow field is uneven.Due to a metatheory do not consider in spiral case circumferential plane the heterogeneity of import circumference flow parameter with
The influence in flow field, thus it is bad by the spiral case performance that this Theoretical Design comes out, deteriorate more especially in high back pressure working status
Substantially, in addition, the side-to-side dimensions of this spiral case are generally bigger, product design size is influenced.
The volute structure of various centrifugal blowers is also disclosed that in the prior art, such as Patent No. ZL 201110118687.5
Disclosed in the Chinese invention patent of (Authorization Notice No. is 102182707 B of CN)《A kind of centrifugal blower used for range hood and its
Spiral case inlet pressure generation method》, which includes spiral case top plate, spiral case bottom plate and spiral case coaming plate, the wheel in spiral case coaming plate medial type face
Profile is spiral case inlet pressure, and spiral case inlet pressure is by first straight line DE, the first circular arc line EF, the second circular arc line FG, helix GH, second straight
Line segment HI, which smoothly transits, to be formed by connecting, although after spiral case uses above-mentioned spiral case inlet pressure, being conducive to improve centrifugal blower air quantity, wind
Pressure, efficiency simultaneously reduce aerodynamic noise, but the volute structure is again without taking into full account in spiral case circumferential plane that import circumference flows
The heterogeneity of parameter and the influence in flow field, need to be further improved
The content of the invention
The technical problems to be solved by the invention are to be directed to above-mentioned state of the art, there is provided one kind can reduce spiral case or so
Size can simultaneously lift the centrifugal blower volute of maximum static pressure and effective wind rate section.
Technical solution is used by the present invention solves above-mentioned technical problem：The centrifugal blower volute, the spiral case of the spiral case
Molded line, which includes the start line AC positioned at molded line one end and the end lines MN, the start line AC positioned at the molded line other end, to be included neighbouring
The straight line AB of fan outlet and corresponding to volute tongue position curve BC, the end lines MN adjacent to fan outlet, described
Spiral case inlet pressure between initial line AC and end lines MN is helix, it is characterised in that：The helix includes and start line AC phases
The first helix CD even and the second helix DM, the first helix CD being connected with end lines MN are constant for the angle of flare
Equiangular helical spiral, the second helix DM is the tapered variable angle spiral of the angle of flare.
Preferably, the polar radius R of the first helix CDCDIt is defined as：Wherein, R2
For impeller outer diameter, t is impeller excircle and the design gaps on volute tongue top, and t/R2∈ [0.01,0.15], the angle of flare α ∈
[3 °, 8 °], θ0Set for selected start angle, and θ0∈ [60 °, 180 °], θ are that the pole of arbitrary point on the first helix CD is sat
Mark angle variables.
Further preferably, the polar radius R of the second helix DMDMIt is defined as：Its
In, R2For impeller outer diameter, t is impeller excircle and the design gaps on volute tongue top, and t/R2∈ [0.01,0.15], variable expansion
Angleα1∈[3°,8°],α2∈ [3 °, 8 °] and α1≥α2,Adjust
Save item s ∈ [- 0.5,0.5], r ∈ [- 5,5] and the polar angle variable that r ≠ 1, θ are arbitrary point on the second helix DM, α1
For the angle of flare of D points, α2For the angle of flare of M points,For the cornerite of the second helix DM.
Further preferably, the end lines MN includes the straightway of neighbouring air outlet and the curved section of neighbouring DM.
Compared with prior art, the advantage of the invention is that：Considered during the centrifugal blower volute Profile Design spiral case into
The even property of gas circumferential asymmetry, by the way that the spiral case inlet pressure between start line AC and end lines MN is designed to the first helix CD and second
Helix DM, and the first helix CD is equiangular helical spiral, the second helix DM is the tapered variable angle spiral of the angle of flare, makes snail
The side-to-side dimensions of shell reduce, and improve the fluency that spiral case internal gas flow is collected and passed through, hence it is evident that improve maximum static pressure and have
The static pressure of air quantity section is imitated, realizes and is issued to big spiral case effect in small size, while reduces aerodynamic noise, improves user's body
Test.
Brief description of the drawings
Fig. 1 is the structure diagram of the embodiment of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with attached drawing embodiment.
As shown in Figure 1, the spiral case inlet pressure of the centrifugal blower volute in the present embodiment includes the start line positioned at molded line one end
The AC and end lines MN positioned at the molded line other end, wherein, start line AC includes the straight line AB of neighbouring fan outlet and corresponds to
The curve BC at volute tongue position, end lines MN is adjacent to fan outlet.
Spiral case inlet pressure between start line AC and end lines MN is helix, which includes what is be connected with start line AC
First helix CD and the second helix DM, the first helix CD being connected with end lines MN is the constant equiangular spiral of the angle of flare
Line, the second helix DM are the tapered variable angle spiral of the angle of flare.In addition, end lines MN includes the straight of neighbouring air outlet
The curved section of line segment and neighbouring DM.
In the present embodiment, the polar radius R of the first helix CDCDIt is defined as：Wherein, R2
For impeller outer diameter, t is impeller excircle and the design gaps on volute tongue top, and t/R2∈ [0.01,0.15], the angle of flare α ∈
[3 °, 8 °], θ0Set for selected start angle, and θ0∈ [60 °, 180 °], θ are that the pole of arbitrary point on the first helix CD is sat
Mark angle variables.
In the present embodiment, the polar radius R of the second helix DMDMIt is defined as：Wherein,
R2For impeller outer diameter, t is impeller excircle and the design gaps on volute tongue top, and t/R2∈ [0.01,0.15], the variable angle of flareα1∈[3°,8°],α2∈ [3 °, 8 °] and α1≥α2,
Adjustment item s ∈ [- 0.5,0.5], r ∈ [- 5,5] and the polar angle variable that r ≠ 1, θ are arbitrary point on the second helix DM,
α1For the angle of flare of D points, α2For the angle of flare of M points,For the cornerite of the second helix DM.By taking the angle of flare of D points in Fig. 1 as an example,
It is described as follows, L1 is tangential on D points perpendicular to OD, L2 and the first helix CD, then the angle α between L1 and L21As volute type
The angle of flare of the line in D points.
The even property of volute air-inlet circumferential asymmetry is considered during the spiral case inlet pressure design of the centrifugal blower volute, by by start line
Spiral case inlet pressure between AC and end lines MN is designed to the first helix CD and the second helix DM, and the first helix CD for etc.
Angle helix, the second helix DM are the tapered variable angle spiral of the angle of flare, reduce the side-to-side dimensions of spiral case, improve spiral case
Internal gas flow collects the static pressure of the fluency with passing through, larger lifting maximum static pressure and effective wind rate section, realizes in small ruler
It is very little to be issued to big spiral case effect, while aerodynamic noise is reduced, improve user experience.
The foregoing is merely the preferred embodiment of the present invention, it is noted that for those of ordinary skills,
Under the premise of the principle of the present invention is not departed from, a variety of remodeling or improvement can be carried out to the present invention, these are regarded as the present invention
Protection domain within.
Claims (4)
1. a kind of centrifugal blower volute, the spiral case inlet pressure of the spiral case is included positioned at the start line AC of molded line one end and another positioned at molded line
The end lines MN, the start line AC of one end include the straight line AB of neighbouring fan outlet and the curve corresponding to volute tongue position
The spiral case inlet pressure of BC, the end lines MN between fan outlet, the start line AC and end lines MN is helix, its
It is characterized in that：The helix includes the first helix CD being connected with start line AC and is connected with end lines MN second spiral
Line DM, the first helix CD are the constant equiangular helical spiral of the angle of flare, the second helix DM for the angle of flare gradually
The variable angle spiral of contracting.
2. centrifugal blower volute according to claim 1, it is characterised in that：The polar radius R of the first helix CDCDIt is fixed
Justice is：Wherein, R2For impeller outer diameter, t is between the design on impeller excircle and volute tongue top
Gap, and t/R2∈ [0.01,0.15], the angle of flare α ∈ [3 °, 8 °], θ0For the start angle of the D points of the first helix CD, and θ0∈
[60 °, 180 °], θ are the polar angle variable of arbitrary point on the first helix CD.
3. centrifugal blower volute according to claim 2, it is characterised in that：The polar radius R of the second helix DMDMIt is fixed
Justice is：Wherein, R2For impeller outer diameter, t is between the design on impeller excircle and volute tongue top
Gap, and t/R2∈ [0.01,0.15], the variable angle of flareα1∈[3°,
8°],α2∈ [3 °, 8 °] and α1≥α2,Adjustment item s ∈ [- 0.5,0.5], r ∈ [- 5,5] and r ≠ 1, θ are
The polar angle variable of arbitrary point, α on second helix DM1For the angle of flare of D points, α2For the angle of flare of M points,For second
The cornerite of helix DM.
4. according to the centrifugal blower volute described in claim 1 or 2 or 3, it is characterised in that：The end lines MN include it is neighbouring go out
The curved section of the straightway in air port and neighbouring DM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710369371.0A CN107975497B (en) | 2017-05-23 | 2017-05-23 | Centrifugal fan spiral case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710369371.0A CN107975497B (en) | 2017-05-23 | 2017-05-23 | Centrifugal fan spiral case |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107975497A true CN107975497A (en) | 2018-05-01 |
| CN107975497B CN107975497B (en) | 2024-04-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710369371.0A Active CN107975497B (en) | 2017-05-23 | 2017-05-23 | Centrifugal fan spiral case |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107975497B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112065740A (en) * | 2019-06-11 | 2020-12-11 | 青岛海尔智能技术研发有限公司 | Centrifugal fan |
| CN112833032A (en) * | 2020-11-02 | 2021-05-25 | 宁波方太厨具有限公司 | Parallel double-fan system and range hood applying same |
| CN113513501A (en) * | 2021-04-02 | 2021-10-19 | 宁波方太厨具有限公司 | Volute for range hood, fan system and range hood |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003343490A (en) * | 2002-05-23 | 2003-12-03 | San Medical Gijutsu Kenkyusho:Kk | Centrifugal pump and casing design method therefor |
| CN101705949A (en) * | 2009-10-30 | 2010-05-12 | 美的集团有限公司 | Centrifugal fan volute of range hood |
| CN102182707A (en) * | 2011-05-09 | 2011-09-14 | 美的集团有限公司 | Centrifugal fan for range hood and volute profile generation method thereof |
| US20110250065A1 (en) * | 2010-04-09 | 2011-10-13 | Foxconn Technology Co., Ltd. | Centrifugal fan |
| CN102734220A (en) * | 2012-07-16 | 2012-10-17 | 中国农业大学 | Spiral casing for pneumatic extinguisher |
| CN206845545U (en) * | 2017-05-23 | 2018-01-05 | 宁波方太厨具有限公司 | A kind of centrifugal blower volute |
-
2017
- 2017-05-23 CN CN201710369371.0A patent/CN107975497B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003343490A (en) * | 2002-05-23 | 2003-12-03 | San Medical Gijutsu Kenkyusho:Kk | Centrifugal pump and casing design method therefor |
| CN101705949A (en) * | 2009-10-30 | 2010-05-12 | 美的集团有限公司 | Centrifugal fan volute of range hood |
| US20110250065A1 (en) * | 2010-04-09 | 2011-10-13 | Foxconn Technology Co., Ltd. | Centrifugal fan |
| CN102182707A (en) * | 2011-05-09 | 2011-09-14 | 美的集团有限公司 | Centrifugal fan for range hood and volute profile generation method thereof |
| CN102734220A (en) * | 2012-07-16 | 2012-10-17 | 中国农业大学 | Spiral casing for pneumatic extinguisher |
| CN206845545U (en) * | 2017-05-23 | 2018-01-05 | 宁波方太厨具有限公司 | A kind of centrifugal blower volute |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112065740A (en) * | 2019-06-11 | 2020-12-11 | 青岛海尔智能技术研发有限公司 | Centrifugal fan |
| CN112065740B (en) * | 2019-06-11 | 2022-03-04 | 青岛海尔智能技术研发有限公司 | Centrifugal fan |
| CN112833032A (en) * | 2020-11-02 | 2021-05-25 | 宁波方太厨具有限公司 | Parallel double-fan system and range hood applying same |
| CN113513501A (en) * | 2021-04-02 | 2021-10-19 | 宁波方太厨具有限公司 | Volute for range hood, fan system and range hood |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107975497B (en) | 2024-04-02 |
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