CN205173063U - Centrifugal fan shell - Google Patents
Centrifugal fan shell Download PDFInfo
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- CN205173063U CN205173063U CN201520899684.3U CN201520899684U CN205173063U CN 205173063 U CN205173063 U CN 205173063U CN 201520899684 U CN201520899684 U CN 201520899684U CN 205173063 U CN205173063 U CN 205173063U
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- 241000886569 Cyprogenia stegaria Species 0.000 title claims abstract description 22
- 241000237858 Gastropoda Species 0.000 claims description 55
- LBDKZZIBHKJTJY-UHFFFAOYSA-N BB1CC1 Chemical compound BB1CC1 LBDKZZIBHKJTJY-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000003068 static effect Effects 0.000 abstract description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004141 dimensional analysis Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
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Abstract
The utility model discloses a centrifugal fan shell, which comprises a volute upper end cover, a volute lower end cover and a volute enclosing plate, wherein the volute enclosing plate is connected with the volute upper end cover and the volute lower end cover; the volute casing upper end cover worm line comprises an upper starting section, an upper volute tongue arc section, an upper spiral line section, an upper straight line section and an upper ending section which are connected in sequence; the volute lower end cover volute line comprises a lower starting section, a lower volute tongue arc section, a lower spiral line section, a lower straight line section and a lower ending section which are sequentially connected. The utility model discloses the pneumatic noise of reduction that can be better improves the complete machine noise condition, can effectively improve the total pressure efficiency and the static pressure value of fan simultaneously. Meanwhile, the structure is adopted to effectively reduce the processing complexity and ensure the production efficiency.
Description
[technical field]
The utility model relates to a kind of radial fan shell.
[background technique]
Conventional centrifugal blower fan adopt one-dimensional analysis supposition import circumferentially flow parameter be uniformly distributed and the circular rector method such as the basis that in spiral case, the air-flow moment of momentum is constant passed through and make log spiral.Do not consider during this patten's design volute casing that gas causes inlet velocity uneven in the impact of snail tongue position, in fact rationally volute casing presents asymmetric state.And existing Volute Design adopts the periodic inswept snail tongue of the tail of symmetric design centrifugal impellers blades to produce pulsating force, produce Rotation Noise, cause noise higher.
[summary of the invention]
The purpose of this utility model is to overcome the deficiencies in the prior art part, provides a kind of and reduces processed complex degree, ensure manufacturing efficiency, reduce aerodynamic noise, improve complete machine noise, effectively improve the total pressure efficiency of blower fan and the radial fan shell of static pressure.
The purpose of this utility model is achieved in that
A kind of radial fan shell, is characterized in that the spiral case coaming plate 3 that it comprises spiral case upper end cap 1, spiral case lower end cap 2, connection spiral case upper end cap 1 and spiral case lower end cap 2 forms; This spiral case upper end cap 1 helical line comprises the upper the initial segment AB that order is connected, upper snail lingual arch section BC, upper helical segment CD, upper helical segment DE, upper straightway EF, upper helical segment FG, upper straightway GH and upper ending segment HI, wherein go up the initial segment AB be positioned at one end of spiral case inlet pressure and correspond to snail tongue, upper ending segment HI is positioned at the other end also contiguous fan outlet of spiral case inlet pressure; Spiral case lower end cap 2 helical line comprises the lower the initial segment A1B1 that order is connected, lower snail lingual arch section B1C1, lower helical segment C1D1, lower helical segment D1E, lower straightway EF, lower helical segment FG, lower straightway GH and lower ending segment HI; Wherein descend the initial segment A1B1 be positioned at one end of spiral case inlet pressure and correspond to snail tongue, lower ending segment HI is positioned at the other end also contiguous fan outlet of spiral case inlet pressure.
A kind of radial fan shell as above, it is characterized in that on described upper end cap helical line, the initial segment AB and upper snail lingual arch section BC is smoothly connected, upper helical segment CD and upper snail lingual arch section BC is smoothly connected, and upper snail lingual arch section BC radius is 5mm-15mm.
A kind of radial fan shell as above, it is characterized in that described upper helical segment CD is connected with upper helical segment DE rounding off, upper straightway EF is connected with upper helical segment DE rounding off, upper helical segment FG is connected with upper straightway EF rounding off, upper straightway GH is connected with upper helical segment FG rounding off, and upper straightway GH connects with the crossing rounding off of upper ending segment HI.
A kind of radial fan shell according to claim 1, under it is characterized in that described spiral case lower end cap helical line, the initial segment A1B1 is connected with lower snail lingual arch section B1C1 rounding off, lower helical segment C1D1 is connected with lower snail lingual arch section B1C1 rounding off, and lower snail lingual arch section B1C1 radius is 5mm-15mm.
A kind of radial fan shell as above, it is characterized in that described lower helical segment C1D1 is connected with lower helical segment D1E rounding off, lower straightway EF is connected with lower helical segment D1E section rounding off, lower helical segment FG is connected with lower straightway EF rounding off, lower straightway GH is connected with lower helical segment FG rounding off, and lower straightway GH connects with the crossing rounding off of lower ending segment HI.
A kind of radial fan shell as above, is characterized in that the upper helix CD section end points C of described spiral case upper end cap helical line is a with the Y-axis phase drop value of the helix C1D1 section end points C1 of spiral case lower end cap helical line; Spiral case upper end cap snail tongue section arc BC center of circle O is b with the Y-axis phase drop value of spiral case lower end cap snail tongue section arc B1C1 center of circle O1; Wherein a-b < 1.
A kind of radial fan shell as above, it is characterized in that described upper the initial segment AB, lower the initial segment A1B1, upper snail lingual arch section BC, lower snail lingual arch section B1C1, upper helical segment CD, lower helical segment C1D1 have dislocation and make the spiral case coaming plate of the upper and lower end cap of connection form warp surface AA1BB1CC1DD1.
A kind of radial fan shell as above, it is characterized in that the warp surface BB1CC1 that described upper snail lingual arch section BC and lower snail lingual arch section B1C1 is formed is batter post face, the center line in this batter post face and spiral case end cap angle are 1 ° ~ 12 °
The beneficial effects of the utility model are:
The deficiency of the utility model to present symmetrical structure spiral case proposes a kind of snail tongue and part spiral case curve non-symmetry structure spiral case, reduces and produces Rotation Noise because the periodic inswept snail tongue of spiral case centrifugal impellers blades produces pulsating force.Binding isotherm, snail tongue connects helical line part and adopts part non-symmetry structure.For the asymmetric form spiral case of reasonable volute casing snail tongue and with snail tongue attachment portion helical line on adopt non-symmetry structure can reduce aerodynamic noise preferably, improve complete machine noise situation, effectively can improve total pressure efficiency and the static pressure of blower fan simultaneously.Adopt said structure to effectively reduce processed complex degree simultaneously, ensure manufacturing efficiency.
[accompanying drawing explanation]
Fig. 1 is the utility model structural representation;
Fig. 2 is stereogram of the present utility model.
[embodiment]
Below in conjunction with accompanying drawing, the utility model is described in further detail:
A kind of radial fan shell, it spiral case coaming plate 3 comprising spiral case upper end cap 1, spiral case lower end cap 2, connection spiral case upper end cap 1 and spiral case lower end cap 2 forms; This spiral case upper end cap 1 helical line comprises the upper the initial segment AB that order is connected, upper snail lingual arch section BC, upper helical segment CD, upper helical segment DE, upper straightway EF, upper helical segment FG, upper straightway GH and upper ending segment HI, wherein go up the initial segment AB be positioned at one end of spiral case inlet pressure and correspond to snail tongue, upper ending segment HI is positioned at the other end also contiguous fan outlet of spiral case inlet pressure; Spiral case lower end cap 2 helical line comprises the lower the initial segment A1B1 that order is connected, lower snail lingual arch section B1C1, lower helical segment C1D1, lower helical segment D1E, lower straightway EF, lower helical segment FG, lower straightway GH and lower ending segment HI; Wherein descend the initial segment A1B1 be positioned at one end of spiral case inlet pressure and correspond to snail tongue, lower ending segment HI is positioned at the other end also contiguous fan outlet of spiral case inlet pressure.
On upper end cap helical line, the initial segment AB is connected with upper snail lingual arch section BC rounding off, and upper helical segment CD is connected with upper snail lingual arch section BC rounding off, and upper snail lingual arch section BC radius is 5mm-15mm.
Upper helical segment CD is connected with upper helical segment DE rounding off, upper straightway EF is connected with upper helical segment DE rounding off, upper helical segment FG is connected with upper straightway EF rounding off, upper straightway GH is connected with upper helical segment FG rounding off, and upper straightway GH connects with the crossing rounding off of upper ending segment HI.
Under spiral case lower end cap helical line, the initial segment A1B1 is connected with lower snail lingual arch section B1C1 rounding off, and lower helical segment C1D1 is connected with lower snail lingual arch section B1C1 rounding off, and lower snail lingual arch section B1C1 radius is 5mm-15mm.
Lower helical segment C1D1 is connected with lower helical segment D1E rounding off, lower straightway EF is connected with lower helical segment D1E section rounding off, lower helical segment FG is connected with lower straightway EF rounding off, lower straightway GH is connected with lower helical segment FG rounding off, and lower straightway GH connects with the crossing rounding off of lower ending segment HI.
The upper helix CD section end points C of spiral case upper end cap helical line is a with the Y-axis phase drop value of the helix C1D1 section end points C1 of spiral case lower end cap helical line; Spiral case upper end cap snail tongue section arc BC center of circle O is b with the Y-axis phase drop value of spiral case lower end cap snail tongue section arc B1C1 center of circle O1; Wherein a-b < 1
Upper the initial segment AB, lower the initial segment A1B1, upper snail lingual arch section BC, lower snail lingual arch section B1C1, upper helical segment CD, lower helical segment C1D1 have dislocation and make the spiral case coaming plate of the upper and lower end cap of connection form warp surface AA1BB1CC1DD1.
The warp surface BB1CC1 that upper snail lingual arch section BC and lower snail lingual arch section B1C1 is formed is batter post face, and the center line in this batter post face and spiral case end cap angle are 1 ° ~ 12 °.
Claims (8)
1. a radial fan shell, it is characterized in that it comprise spiral case upper end cap (1), spiral case lower end cap (2), connect spiral case upper end cap (1) and spiral case lower end cap (2) spiral case coaming plate (3) form; This spiral case upper end cap (1) helical line comprises the upper the initial segment (AB) that order is connected, upper snail lingual arch section (BC), upper helical segment (CD), upper helical segment (DE), upper straightway (EF), upper helical segment (FG), upper straightway (GH) and upper ending segment (HI), wherein go up the initial segment (AB) be positioned at one end of spiral case inlet pressure and correspond to snail tongue, upper ending segment (HI) is positioned at the other end also contiguous fan outlet of spiral case inlet pressure; Spiral case lower end cap (2) helical line comprises the lower the initial segment (A1B1) that order is connected, lower snail lingual arch section (B1C1), lower helical segment (C1D1), lower helical segment (D1E), lower straightway (EF), lower helical segment (FG), lower straightway (GH) and lower ending segment (HI); Wherein descend the initial segment (A1B1) be positioned at one end of spiral case inlet pressure and correspond to snail tongue, lower ending segment (HI) is positioned at the other end also contiguous fan outlet of spiral case inlet pressure.
2. a kind of radial fan shell according to claim 1, it is characterized in that on described upper end cap helical line, the initial segment (AB) and upper snail lingual arch section (BC) are smoothly connected, upper helical segment (CD) and upper snail lingual arch section (BC) are smoothly connected, and upper snail lingual arch section (BC) radius is 5mm-15mm.
3. a kind of radial fan shell according to claim 1, it is characterized in that described upper helical segment (CD) is connected with upper helical segment (DE) rounding off, upper straightway (EF) is connected with upper helical segment (DE) rounding off, upper helical segment (FG) is connected with upper straightway (EF) rounding off, upper straightway (GH) is connected with upper helical segment (FG) rounding off, and upper straightway (GH) connects with upper ending segment (HI) crossing rounding off.
4. a kind of radial fan shell according to claim 1, under it is characterized in that described spiral case lower end cap helical line, the initial segment (A1B1) is connected with lower snail lingual arch section (B1C1) rounding off, lower helical segment (C1D1) is connected with lower snail lingual arch section (B1C1) rounding off, and lower snail lingual arch section (B1C1) radius is 5mm-15mm.
5. a kind of radial fan shell according to claim 1, it is characterized in that described lower helical segment (C1D1) is connected with lower helical segment (D1E) rounding off, lower straightway (EF) is connected with lower helical segment (D1E) section rounding off, lower helical segment (FG) is connected with lower straightway (EF) rounding off, lower straightway (GH) is connected with lower helical segment (FG) rounding off, and lower straightway (GH) connects with the crossing rounding off of lower ending segment (HI).
6. a kind of radial fan shell according to claim 1, is characterized in that upper helix (CD) section end points (C) of described spiral case upper end cap helical line is (a) with (Y) axle phase drop value of helix (C1D1) section end points (C1) of spiral case lower end cap helical line; Spiral case upper end cap snail tongue section arc (BC) center of circle (O) is (b) with (Y) axle phase drop value of spiral case lower end cap snail tongue section arc (B1C1) center of circle (O1); Wherein (a)-(b) < 1.
7. a kind of radial fan shell according to claim 1, it is characterized in that described upper the initial segment (AB), lower the initial segment (A1B1), upper snail lingual arch section (BC), lower snail lingual arch section (B1C1), upper helical segment (CD), lower helical segment (C1D1) have dislocation and make the spiral case coaming plate of the upper and lower end cap of connection form warp surface (AA1BB1CC1DD1).
8. a kind of radial fan shell according to claim 1, it is characterized in that the warp surface (BB1CC1) that described upper snail lingual arch section (BC) and lower snail lingual arch section (B1C1) are formed is batter post face, the center line in this batter post face and spiral case end cap angle are 1 ° ~ 12 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520899684.3U CN205173063U (en) | 2015-11-11 | 2015-11-11 | Centrifugal fan shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520899684.3U CN205173063U (en) | 2015-11-11 | 2015-11-11 | Centrifugal fan shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205173063U true CN205173063U (en) | 2016-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520899684.3U Active CN205173063U (en) | 2015-11-11 | 2015-11-11 | Centrifugal fan shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205173063U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107975496A (en) * | 2017-05-23 | 2018-05-01 | 宁波方太厨具有限公司 | A kind of centrifugal blower volute |
| CN109681469A (en) * | 2017-10-18 | 2019-04-26 | 宁波方太厨具有限公司 | Centrifugal blower volute structure |
-
2015
- 2015-11-11 CN CN201520899684.3U patent/CN205173063U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107975496A (en) * | 2017-05-23 | 2018-05-01 | 宁波方太厨具有限公司 | A kind of centrifugal blower volute |
| CN107975496B (en) * | 2017-05-23 | 2024-04-02 | 宁波方太厨具有限公司 | Centrifugal fan spiral case |
| CN109681469A (en) * | 2017-10-18 | 2019-04-26 | 宁波方太厨具有限公司 | Centrifugal blower volute structure |
| CN109681469B (en) * | 2017-10-18 | 2023-11-17 | 宁波方太厨具有限公司 | Volute structure of centrifugal fan |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |