CN207647842U - A kind of volute structure of centrifugal blower - Google Patents
A kind of volute structure of centrifugal blower Download PDFInfo
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- CN207647842U CN207647842U CN201721890500.2U CN201721890500U CN207647842U CN 207647842 U CN207647842 U CN 207647842U CN 201721890500 U CN201721890500 U CN 201721890500U CN 207647842 U CN207647842 U CN 207647842U
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Abstract
The utility model is related to a kind of volute structures of centrifugal blower, including front shroud, back shroud and the spiral case coaming plate being connected between front shroud and back shroud, the spiral case inlet pressure of spiral case includes start line AC positioned at one end of spiral case inlet pressure and corresponding to volute tongue position and positioned at the spiral case inlet pressure other end and closes on the end lines GK of fan outlet, and spiral case inlet pressure further includes the first helix CD being connected with start line AC, the second helix EG being connected with end lines GK and the straightway DE being connected between the first helix CD and the second helix EG.Straightway DE can effectively control the overall width of spiral case, and under the premise of spiral case overall width is certain, to airflow influence minimum；The first helix CD of the utility model is designed using the design method of log spiral, second helix EG is designed using spiral of Archimedes design method, aerodynamic quality can be effectively improved with straightway DE cooperations, reduces the pneumatic and noise of centrifugal blower.
Description
Technical field
The utility model is related to centrifugal blower technical fields, refer specifically to a kind of volute structure of centrifugal blower.
Background technology
The advantages that centrifugal blower is big, noise is low, compact-sized with its suction and extensive reference has been obtained in range hood.
Spiral case is one of core component of centrifugal blower, and effect is will to leave the gas concentration of impeller, 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.
Chinese utility model such as Patent No. ZL201110118687.5 (Authorization Notice No. CN102182707B) is special
Disclosed in profit《A kind of centrifugal blower used for range hood and its spiral case inlet pressure generation method》, which includes spiral case top plate, snail
The contour line of shell bottom plate and spiral case coaming plate, spiral case coaming plate medial type face is spiral case inlet pressure, and spiral case inlet pressure is by first straight line DE, first
Circular arc line EF, the second circular arc line FG, helix GH, second straight line section HI smoothly transit and are formed by connecting, although spiral case is using above-mentioned
After spiral case inlet pressure, is conducive to improve centrifugal blower air quantity, wind pressure, efficiency and reduces aerodynamic noise, but the volute structure is inhaled
The limitation of kitchen ventilator width dimensions, aerodynamic quality are performed poor, and need to be further improved.
Utility model content
For the current state of the art, the technical problem to be solved by the utility model is to provide one kind by making volute type
Line rationally reduces gas flow resistance using straightway, improves the volute structure of the centrifugal blower of aerodynamic quality.
Technical solution is used by the utility model solves above-mentioned technical problem：A kind of volute structure of centrifugal blower,
Including front shroud, back shroud and the spiral case coaming plate being connected between front shroud and back shroud, the spiral case inlet pressure of spiral case includes being located at
One end of spiral case inlet pressure and start line AC corresponding to volute tongue position and positioned at the spiral case inlet pressure other end and close on fan outlet
End lines GK, it is characterised in that：The spiral case inlet pressure further includes the first helix CD being connected with start line AC and terminates
The second helix EG that line GK the is connected and straightway DE being connected between the first helix CD and the second helix EG.
In the above scheme, it is the first center line horizontal through the straight line of spiral case inlet pressure center O, the straightway DE is vertical
First center line is arranged.Preferably, first center line is arranged across the top of straightway DE.Straightway DE can be controlled effectively
The overall width of spiral case processed, and under the premise of Casing width is certain, using the structure to airflow influence minimum.
Preferably, the start line AC includes straightway AB and tangent is connected between straightway AB and the first helix CD
Volute tongue circular arc line BC.
Preferably, the radius of the circular arc line BC is 5mm~15mm.
Further preferably, the straight line for passing vertically through spiral case inlet pressure center O is the second center line, C points on volute tongue circular arc line BC
Angle between place diameter and the second center line is δ=15 °~35 °.
In order to make the volute structure designed more meet the real work situation of centrifugal blower, the first helix CD packets
Include radius difference and successively the arc section CM, arc section MN, arc section NP and arc section PD of tangent connection.
Preferably, the straight line for passing vertically through spiral case inlet pressure center O is the second center line, which passes through arc section
The N points of MN are arranged.
Preferably, on the arc section CM, arc section MN any point to center O radius R=140mm~150mm, and circle
The radius of segmental arc CM is less than the radius of arc section MN.
Further preferably, it is the first center line horizontal through the straight line of spiral case inlet pressure center O, D points on the arc section PD
Angle between first center line is 180 ° of θ≤210 ° ＜.
In order to make the volute structure designed more meet the real work situation of centrifugal blower, the second helix EG packets
Include radius difference and successively the arc section EQ, arc section QF, arc section FL and arc section LG of tangent connection.
Preferably, be the first center line horizontal through the straight line of spiral case inlet pressure center O, the upper E points of the arc section EQ and this
Angle between first center line is 180 ° of θ≤210 ° ＜.
Further preferably, the length of the straightway AB is 50mm ＜ L≤120mm, between straightway AB and the first center line
Angle be 45 °≤α≤90 °.
Further preferably, the end lines GK is straightway, and the straight line horizontal through spiral case inlet pressure center O is the first center
Line, the angle between the end lines the first center lines of GK is 75 °≤β≤90 °.
Preferably, the size of the spiral case in the direction of the width is a=320mm~360mm, and the spiral case is in length direction
On size be b=340mm~365mm, the distance between the front shroud and back shroud be c=165mm~185mm.
Compared with prior art, the utility model has the advantage of：The centrifugal blower volute structure of the utility model is by snail
Line segment between shell mould line start line and end lines is divided into the first helix CD, the second helix EG and is located at the first helix CD
The overall width of spiral case can be effectively controlled with the straightway DE among the second helix EG, straightway DE, and whole wide in spiral case
Under the premise of degree is certain, to airflow influence minimum, meanwhile, the first helix CD setting using log spiral of the utility model
Meter method is designed, and the second helix EG is designed using spiral of Archimedes design method, can be had with straightway DE cooperations
Effect improves aerodynamic quality, reduces the pneumatic and noise of centrifugal blower.
Description of the drawings
Fig. 1 is the volute structure schematic diagram of the utility model embodiment；
Fig. 2 is the structural schematic diagram of spiral case inlet pressure in the utility model embodiment.
Specific implementation mode
The utility model is described in further detail below in conjunction with attached drawing embodiment.
As shown in Figure 1, 2, before the volute structure of the centrifugal blower of the present embodiment includes front shroud 1, back shroud 2 and is connected to
Spiral case coaming plate 3 between cover board 1 and back shroud 2, the spiral case inlet pressure of spiral case include positioned at one end of spiral case inlet pressure and corresponding to snail
The start line AC of tongue position, it positioned at the spiral case inlet pressure other end and closes on the end lines GK of fan outlet, be connected with start line AC
The first helix CD for connecing, the second helix EG being connected with end lines GK and it is connected to the first helix CD and the second spiral shell
Straightway DE between spin line EG.
Definition is the first center line L1 horizontal through the straight line of spiral case inlet pressure center O, passes vertically through spiral case inlet pressure center O's
Straight line is the second center line L2.
The vertical first center line L1 arrangements of straightway DE of the present embodiment.First center line L1 passes through the top of straightway DE
Arrangement.Straightway DE can effectively control the overall width of spiral case, and under the premise of Casing width is certain, using the structure pair
Airflow influence is minimum.Start line AC includes straightway AB and the tangent volute tongue being connected between straightway AB and the first helix CD
Circular arc line BC.The radius of circular arc line BC is 5mm~15mm.On volute tongue circular arc line BC where C points between diameter and the second center line
Angle be δ=15 °~35 °.End lines GK is straightway, and the straight line horizontal through spiral case inlet pressure center O is the first center line,
Angle between the end lines the first center lines of GK is 75 °≤β≤90 °.
In order to make the volute structure designed more meet the real work situation of centrifugal blower, the first helix CD includes half
Diameter is different and the arc section CM, arc section MN, arc section NP and arc section PD of tangent connection successively.Second center line L2 passes through circle
The N points of segmental arc MN are arranged.Any point is to radius R=140mm~150mm of center O, and circular arc on arc section CM, arc section MN
The radius of section CM is less than the radius of arc section MN.Angle on arc section PD between D points and first center line L1 is 180 ° of ＜ θ
≤210°.First helix CD is drawn using the design method of log spiral, the movement rail with tiny gas group in wind turbine
Mark is consistent, radius R=r × e of each point to center O on the first helix CD(m-x)θ, wherein m is joined with the impeller of wind turbine
Number parameter related with metered flow；X is correction factor, and x is not more than 0.2；M=Qn/(2πR2BCu2), wherein B is that spiral case is wide
Degree；Cu2It is the prior art, secondary without repeating for the radius circumferential direction component velocity of tiny gas group in wind turbine；R2For going out for leaf road
Multistage log spiral can be obtained using different x values in port radius.
In the present embodiment, the second helix EG includes that radius is different and arc section EQ, the arc section of tangent connection successively
QF, arc section FL and arc section LG.Angle on arc section EQ between E points and first center line L1 is 180 ° of θ≤210 ° ＜.
Angle of the length of straightway AB between 50mm ＜ L≤120mm, straightway AB and the first center line L1 be 45 °≤α≤
90°.Second helix EG is designed using spiral of Archimedes design method, the upper each points of the second helix EG to center O partly
Diameter R=r+r (m-t) θ, wherein r is the radius of rear air inlet, and t is correction value, 0≤t≤0.1.It can be obtained using different t values
To multistage spiral of Archimedes.Spiral of Archimedes has the opening width small compared to log spiral, rationally utilizes t values
Smaller opening width can be reached, and so that smaller to air-flow flow effect, the opening width at any angle θ is Aθ=R-R2。
The size of the spiral case of the present embodiment in the direction of the width is a=320mm~360mm, and spiral case is in the longitudinal direction
Size is b=340mm~365mm, and the distance between front shroud 1 and back shroud 2 are c=165mm~185mm.
Using the design method of the present embodiment, the centrifugation wind for the top-sucking kitchen ventilator that a overall width is 353mm is designed
Machine spiral case, using identical impeller, compared with original spiral case, naked wind turbine maximum static pressure is promoted, and remains former in noise
Air quantity promotes 1m in the case of having level3/ min, design parameter are maximum static pressure 385Pa, air quantity 18m3/ min, laboratory noise
57.5dB。
Claims (15)
1. a kind of volute structure of centrifugal blower, including front shroud (1), back shroud (2) and it is connected to front shroud (1) and back shroud
(2) spiral case inlet pressure of the spiral case coaming plate (3) between, spiral case includes rising positioned at one end of spiral case inlet pressure and corresponding to volute tongue position
Initial line AC and positioned at the spiral case inlet pressure other end and close on the end lines GK of fan outlet, it is characterised in that：The spiral case inlet pressure
Further include the first helix CD being connected with start line AC, the second helix EG being connected with end lines GK and is connected to
Straightway DE between first helix CD and the second helix EG.
2. the volute structure of centrifugal blower according to claim 1, it is characterised in that：Horizontal through spiral case inlet pressure center O
Straight line be the first center line, the vertical first center line arrangement of the straightway DE.
3. the volute structure of centrifugal blower according to claim 2, it is characterised in that：First center line passes through straight line
The top arrangement of section DE.
4. the volute structure of centrifugal blower according to claim 1, it is characterised in that：The start line AC includes straightway
The AB and tangent volute tongue circular arc line BC being connected between straightway AB and the first helix CD.
5. the volute structure of centrifugal blower according to claim 4, it is characterised in that：The radius of the circular arc line BC is
5mm~15mm.
6. the volute structure of centrifugal blower according to claim 4, it is characterised in that：Pass vertically through spiral case inlet pressure center O
Straight line be the second center line, the angle between the upper C points place diameters of volute tongue circular arc line BC and the second center line be δ=15 °~
35°。
7. the volute structure of centrifugal blower according to claim 1, it is characterised in that：The first helix CD includes half
Diameter is different and the arc section CM, arc section MN, arc section NP and arc section PD of tangent connection successively.
8. the volute structure of centrifugal blower according to claim 7, it is characterised in that：Pass vertically through spiral case inlet pressure center O
Straight line be the second center line, second center line across arc section MN N points arrange.
9. the volute structure of centrifugal blower according to claim 7, it is characterised in that：The arc section CM, arc section MN
Upper any point to center O radius R=140mm~150mm, and the radius of arc section CM be less than arc section MN radius.
10. the volute structure of centrifugal blower according to claim 7, it is characterised in that：Horizontal through spiral case inlet pressure center O
Straight line be the first center line, the angle on the arc section PD between D points and first center line is 180 ° of θ≤210 ° ＜.
11. the volute structure of centrifugal blower according to claim 1, it is characterised in that：The second helix EG includes
Radius is different and the arc section EQ, arc section QF, arc section FL and arc section LG of tangent connection successively.
12. the volute structure of centrifugal blower according to claim 11, it is characterised in that：Horizontal through spiral case inlet pressure center
The straight line of O is the first center line, and the angle on the arc section EQ between E points and first center line is 180 ° of θ≤210 ° ＜.
13. the volute structure of centrifugal blower according to claim 1, it is characterised in that：The length of the straightway AB is
50mm ＜ L≤120mm, the angle between straightway AB and the first center line are 45 °≤α≤90 °.
14. the volute structure of centrifugal blower according to claim 1, it is characterised in that：The end lines GK is straightway,
Straight line horizontal through spiral case inlet pressure center O is the first center line, the angle between the end lines the first center lines of GK is 75 °≤
β≤90°。
15. the volute structure of centrifugal blower according to claim 1, it is characterised in that：The spiral case is in the direction of the width
Size be a=320mm~360mm, the size of the spiral case in the longitudinal direction be b=340mm~365mm, the protecgulum
The distance between plate and back shroud are c=165mm~185mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721890500.2U CN207647842U (en) | 2017-12-28 | 2017-12-28 | A kind of volute structure of centrifugal blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721890500.2U CN207647842U (en) | 2017-12-28 | 2017-12-28 | A kind of volute structure of centrifugal blower |
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| Publication Number | Publication Date |
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| CN207647842U true CN207647842U (en) | 2018-07-24 |
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ID=62875960
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030210A (en) * | 2019-04-29 | 2019-07-19 | 宁波方太厨具有限公司 | A kind of spiral case of the centrifugal blower for range hood and its centrifugal blower of application |
| CN110425157A (en) * | 2019-09-04 | 2019-11-08 | 宁波纽新克电机股份有限公司 | A kind of mixed gas centrifugal blower of heavy duty detergent |
| CN111852912A (en) * | 2020-07-17 | 2020-10-30 | 青岛海信日立空调系统有限公司 | Fan coil |
-
2017
- 2017-12-28 CN CN201721890500.2U patent/CN207647842U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030210A (en) * | 2019-04-29 | 2019-07-19 | 宁波方太厨具有限公司 | A kind of spiral case of the centrifugal blower for range hood and its centrifugal blower of application |
| CN110030210B (en) * | 2019-04-29 | 2024-01-16 | 宁波方太厨具有限公司 | Volute for centrifugal fan of range hood and centrifugal fan using same |
| CN110425157A (en) * | 2019-09-04 | 2019-11-08 | 宁波纽新克电机股份有限公司 | A kind of mixed gas centrifugal blower of heavy duty detergent |
| CN110425157B (en) * | 2019-09-04 | 2023-12-15 | 宁波纽新克电机有限公司 | Efficient gas mixing centrifugal fan |
| CN111852912A (en) * | 2020-07-17 | 2020-10-30 | 青岛海信日立空调系统有限公司 | Fan coil |
| CN111852912B (en) * | 2020-07-17 | 2021-12-07 | 青岛海信日立空调系统有限公司 | Fan coil |
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