CN110159591A - A kind of volute tongue structure and application have the centrifugal blower of the volute tongue structure - Google Patents
A kind of volute tongue structure and application have the centrifugal blower of the volute tongue structure Download PDFInfo
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- CN110159591A CN110159591A CN201910463502.0A CN201910463502A CN110159591A CN 110159591 A CN110159591 A CN 110159591A CN 201910463502 A CN201910463502 A CN 201910463502A CN 110159591 A CN110159591 A CN 110159591A
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- tongue
- volute tongue
- impeller
- volute
- radius
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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
- F04D29/422—Discharge tongues
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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
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
Abstract
The invention discloses a kind of volute tongue structures, the second volute tongue including the first volute tongue and below the first volute tongue, the outside of first volute tongue is in from rear and front end to intermediate, gradually outwardly projecting outer gibbosity, it is characterised in that: the outside of second volute tongue is in from rear and front end to intermediate, gradually inwardly projecting inner concavity.Also disclose a kind of centrifugal blower for applying volute tongue structure as described above.Compared with prior art, the present invention has the advantages that by the way that the first volute tongue and the second volute tongue are staggered half period phase, can the separation of flow preferably to volute tongue surface carry out rectified action, in the noise phase inter-modulation of the unsteady effect of the first volute tongue airflow on surface noise frequency generated and the generation of the second volute tongue airflow function, and then improve sound quality, reduce noise.
Description
Technical field
The present invention relates to power device, especially a kind of volute tongue structure, and application have the centrifugal blower of the volute tongue structure.
Background technique
Forward multi-wing centrifugal blower is the major impetus system of range hood and other ventilation equipment, tight with structure
It gathers, the features such as noise is low, pressure coefficient is high, discharge coefficient is big.Air-flow is formed on its surface volute tongue periodically effect unsteady
Pressure fluctuation, and then generate the biggish noise of blower.Numerical simulation result shows that double suction fan impeller outlet air velocity is along axis
It is distributed in conic section, mid-game position and speed is high, and front and back disk position air velocity is low, the reflux meeting at volute tongue and impeller clearance
Reduce the efficiency of centrifugal blower.
In order to reduce noise, centrifugal blower efficiency is improved, some schemes also have been disclosed.Such as application No. is
A kind of angled step volute tongue volute of blower disclosed in 201510782850.6 Chinese patent comprising: after spiral case foreboard, spiral case
Plate and the ring wall being located between spiral case foreboard, spiral case back plate are equipped with snail at air outlet there are the air outlet of blower on ring wall
Tongue, volute tongue are angled step volute tongue, and the ontology of angled step volute tongue is equipped with the first inclined-plane volute tongue and the second inclined-plane volute tongue, passes through
First inclined-plane volute tongue and the second inclined-plane volute tongue form the buffer area of leggy, for buffering gas in angled step volute tongue
Flow the impact to angled step volute tongue.Above-mentioned this step tongue, the mainly reflux at reduction volute tongue, to increase the quiet of blower
Pressure promotes fan efficiency, and noise reduction effect is limited.
A kind of for another example radial fan volute tongue disclosed in the Chinese patent application No. is 201721111373.1 of the applicant
Structure, including main volute tongue, the lip of the tongue of main volute tongue form the male part to air-flow side evagination, are equipped in the front side bottom of main volute tongue
Downwardly projecting secondary volute tongue is equipped with downwardly projecting secondary volute tongue in the bottom rear of main volute tongue.By using this volute tongue two sides
Bulge-structure is added to carry out air-flow second throttle, rectification effect is limited, and is not excluded for a possibility that generating new abnormal sound.
Summary of the invention
The technical problem to be solved by the present invention is in view of the above-mentioned problems of the prior art, providing a kind of volute tongue knot
Structure weakens the separation of flow phenomenon and pressure fluctuation on volute tongue surface, and then reduces noise.
Second technical problem to be solved by this invention is to provide the centrifugal blower that a kind of application has above-mentioned volute tongue structure.
The present invention solves technical solution used by above-mentioned first technical problem are as follows: a kind of volute tongue structure, including first
Volute tongue and the second volute tongue below the first volute tongue, the outside of first volute tongue be in from rear and front end to centre, gradually to
Outer outer gibbosity outstanding, it is characterised in that: the outside of second volute tongue is in from rear and front end to intermediate, gradually inwardly projecting
Inner concavity.
The present invention solves technical solution used by above-mentioned second technical problem are as follows: a kind of application volute tongue as described above
The centrifugal blower of structure, including spiral case and the impeller being arranged in spiral case, the impeller is double intake air impellers, it is characterised in that:
The inside of first volute tongue and the inside of the second volute tongue are connect with spiral case inner wall, the outside of first volute tongue and the second volute tongue
Outside be respectively the separate side with spiral case junction, the front-rear direction is the axial direction of impeller, the second volute tongue indent
The most recess of shape relative to the first volute tongue outer gibbosity most highlight closer to the junction with spiral case.
Further, the axially varying rule of the first volute tongue and the second volute tongue is respectively with impeller along axial velocity variation
It is opposite be consistent, the impeller includes shroud, hub disk, the mid-game being arranged between shroud and hub disk, the first volute tongue evagination
The most highlight of shape, the most recess of the second volute tongue inner concavity are corresponding with mid-game respectively, thus the first volute tongue and the second snail
Tongue constitutes unsymmetric structure.
Further, it is the secondary back for preferably reducing front and back Pan Chu, promotes fan efficiency, first volute tongue has
And corresponding first leading flank of the shroud of impeller, the first trailing flank corresponding with the hub disk of impeller and corresponding with the mid-game of impeller
The first sectional median plane, first volute tongue further includes the first tongue positioned at outside, and first tongue is along impeller axial direction
On section be arc surface and be directed away from prominent with the direction of spiral case junction, first tongue is in the first front side
Radius at face is R1, radius of first tongue at the first trailing flank is R3, first tongue is in the first sectional median plane
The radius at place is R2, above three radius meets following relationship: R1、R3It is all larger than R2。
Preferably, the above three radius of first tongue meets following relationship: R1:R2=1.4~1.6；R3:R2=
1.1~1.3.
Further, it is the secondary back for preferably reducing front and back Pan Chu, promotes fan efficiency, second volute tongue has
And corresponding second leading flank of the shroud of impeller, the second trailing flank corresponding with the hub disk of impeller and corresponding with the mid-game of impeller
The second sectional median plane, second leading flank extends downwardly by the bottom edge of the first leading flank and formed, second trailing flank
It is extended downwardly by the bottom edge of the first trailing flank and is formed, second sectional median plane is extended downwardly by the bottom edge of the second sectional median plane
And it is formed；Second volute tongue further includes the second tongue positioned at outside, and first tongue is in the section upward along impeller shaft
Be arc surface and be directed away from it is prominent with the direction of spiral case junction, second tongue at the second leading flank half
Diameter is R4, radius of second tongue at the second trailing flank is R6, radius of second tongue at the second sectional median plane
For R5, above three radius meets following relationship: R4、R6It is not less than R5。
Preferably, the above three radius of second tongue meets following relationship: R4:R5=1~1.3；R6:R5=1~
1.3。
First volute tongue also has a top surface, the top surface and the first leading flank intersection, separate with spiral case junction
Intersection point is vertex, and first tongue is in the upper extreme point on the first leading flank and the first line between vertex and horizontal direction
Angle is β1, first tongue is between the second line and the first line between the upper extreme point and vertex of the first trailing flank
Angle be β2, third line and second line of first tongue between the upper extreme point and vertex of the first sectional median plane
Angle be β3；First tongue is in the lower extreme point of the first leading flank and the second tongue between the upper extreme point of the second leading flank
By the first arc transition, the center of circle of first circular arc is central point, radius R of the impeller in shroud corresponding position7, described
One tongue passes through the second arc transition in the lower extreme point of the first trailing flank and the second tongue between the upper extreme point of the second trailing flank,
The center of circle of second circular arc is central point, radius R of the impeller in hub disk corresponding position9, first tongue is among first
The lower extreme point of section and the second tongue pass through third arc transition, the third circular arc between the upper extreme point of the second sectional median plane
The center of circle be central point, radius R of the impeller in mid-game corresponding position8；The close endpoint with spiral case junction of second circular arc
The angle of line and vertical direction between respective impeller central point is α1, first circular arc is close with spiral case junction
Endpoint and respective impeller central point between line, with the angle of vertical direction be α2, the third circular arc is close and spiral case
The angle of line and vertical direction between the endpoint and respective impeller central point of junction is α3；The volute tongue structure and leaf
Gap between wheel is t, and above-mentioned parameter meets following relationship: α1=19 °~21 °, α2=α1± (2 °~4 °), α3=α1±(5°
~7 °), β1=116 °~118 °, β2=4 °~6 °, β3=3 °~5 °, R7=R8=R9=t+ (3~5) mm.
Compared with the prior art, the advantages of the present invention are as follows: the first volute tongues can weaken air-flow to its percussion, cuts
The separation of flow phenomenon and pressure fluctuation of weak volute tongue body structure surface, and then noise is reduced, the second volute tongue can return volute tongue gap location
Row buffering and rectification are flowed into, weakens air-flow in the separation of flow of volute tongue, promotes the static pressure and efficiency of blower；First volute tongue and the second volute tongue
The half period that is staggered phase, can the separation of flow preferably to volute tongue surface carry out rectified action, it is non-in the first volute tongue airflow on surface
The noise phase inter-modulation that the noise frequency and the second volute tongue airflow function that permanent effect generates generate, and then improve sound quality,
Reduce noise.
Detailed description of the invention
Fig. 1 is the schematic diagram of the centrifugal blower of the embodiment of the present invention；
Fig. 2 is the schematic diagram (from top to bottom seeing) of the volute tongue structure of the embodiment of the present invention；
Fig. 3 is the schematic diagram (seeing from the bottom to top) of the volute tongue structure of the embodiment of the present invention；
Fig. 4 is the schematic diagram (seeing from front to back) of the volute tongue structure of the embodiment of the present invention；
Fig. 5 is the schematic diagram of the impeller of the centrifugal blower of the embodiment of the present invention and its distribution of air velocity edge axial direction；
Fig. 6 is the performance curve contrast schematic diagram of the volute tongue structure of the embodiment of the present invention and the volute tongue structure of the prior art；
Fig. 7 is the performance curve comparison diagram of the volute tongue structure of the embodiment of the present invention and the volute tongue structure of the prior art.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
Referring to Fig. 1, Fig. 5 and Fig. 6, a kind of centrifugal blower can be used for range hood and cleaning equipment, including spiral case 1 and set
Set the impeller 2 in spiral case 1.Air inlet 11 and air outlet 12,1 inner wall of spiral case and 12 corresponding position of air outlet are formed on spiral case 1
It is provided with volute tongue structure 3.Impeller 2 is double intake air impellers, including shroud 21, hub disk 22, setting are between shroud 21 and hub disk 22
Mid-game 23, and be arranged between shroud 21 and hub disk 22 pass through mid-game 23 multiple blades 24.Impeller 2 has axis X, axis
Point O centered on each point on line X, the circumferential profile line of impeller 2 are L.
V1For the air-flow absolute velocity size that 21 position of shroud of impeller 2 exports, V2It is exported for 23 position of mid-game of impeller 2
Air-flow absolute velocity size, V3The air-flow absolute velocity size exported for 22 position of hub disk of impeller 2.Wherein, V2:V1=1.4
~1.6；V2:V3=1.1~1.3.
Referring to fig. 2~Fig. 5, volute tongue structure 3 include the first volute tongue 31 and the second volute tongue 32, and two can be integrally formed.Its
In, separate the first volute tongue 31 with the outside of 1 junction of spiral case is in connect from rear and front end to centre, gradually to separate with spiral case 1
Locate outer gibbosity outstanding, the lower section of the first volute tongue 31 is arranged in the second volute tongue 32, in the inner concavity opposite with the first volute tongue 31, i.e.,
The separate outside with 1 junction of spiral case of second volute tongue 32 is in from rear and front end to centre, gradually to outstanding with 1 junction of spiral case
Inner concavity.Most highlight, the most recess of 32 inner concavity of the second volute tongue of first volute tongue, 31 outer gibbosity are corresponding with mid-game 23 respectively.
First volute tongue 31 is to become R volute tongue, and the second volute tongue 32 is to wait R or change R volute tongue.Due to the shroud 21 of impeller 2, hub disk 22
With the unsymmetric structure that is set as of mid-game 23,23 position and speed of mid-game is high, and front and back disk position air velocity is low, therefore the first volute tongue
31 and second volute tongue 32 be unsymmetric structure.
The whole axially varying rule (evagination) of the first volute tongue 31 and 2 outlet air flow velocity of impeller are along axial as a result,
Conic section distribution on the contrary, difference half period phase, the whole axially varying rule (indent) of the second volute tongue 32
It is consistent with 2 outlet air flow velocity of impeller along axial conic section distribution.
First volute tongue 31 includes the first tongue 311 positioned at outside.First volute tongue 31 has the first leading flank 312 and leaf
The shroud 21 of wheel 2 is corresponding, the first trailing flank 313, and first sectional median plane 314 corresponding with the hub disk 22 of impeller 2 and impeller 2
Mid-game 23 it is corresponding.
First tongue 311 is arc surface in the section in 2 axial direction of impeller, and is directed away from and 1 junction of spiral case
Direction it is prominent.First tongue 311 radius at the first leading flank 312 is R1, the first tongue 311 is at the first trailing flank 313
Radius is R3, the first tongue 311 radius at the first sectional median plane 314 is R2.The change R radius of first tongue 311 in the application
Are as follows: R1:R2=1.4~1.6；R3:R2=1.1~1.3.Preferably, R1=6mm, R1:R2=1.42；R3:R2=1.17.
Second volute tongue 32 includes the first tongue 321 positioned at outside.Second volute tongue 32 has the second leading flank 322 (by the
The bottom edge of one leading flank 312 extends downwardly), it is corresponding with the shroud 21 of impeller 2, the second trailing flank 323 is (by the first trailing flank 313
Bottom edge extend downwardly), and second sectional median plane 324 corresponding with the hub disk 22 of impeller 2 be (by the bottom of the first sectional median plane 314
While extending downwardly), it is corresponding with the mid-game 23 of impeller 2.
Second tongue 321 is arc surface in the section in 2 axial direction of impeller, and is directed away from and 1 junction of spiral case
Direction it is prominent.Second volute tongue 32 includes the second tongue 321 positioned at outside.Second tongue 321 in the second leading flank 322 half
Diameter is R4, radius of second tongue 321 in the second trailing flank 323 is R6, radius of second tongue 321 in the second sectional median plane 324
For R5.The change R radius of second tongue 321 in the application are as follows: R4:R5=1~1.3；R6:R5=1~1.3.Preferably, R2=R5=
R6=6mm.
(the most recess of 32 inner concavity of the second volute tongue is relative to the first volute tongue 31 closer to 1 inside of spiral case for second volute tongue 32
The most highlight of outer gibbosity is closer to the junction with spiral case), along 2 direction of rotation of impeller, it is in 31 downstream bits of the first volute tongue
It sets, this position air velocity is relatively low, and the second volute tongue 32 can be to the flowing tail and volute tongue gap location of first volute tongue 31
Row buffering and rectification are flowed back into, weakens air-flow in the separation of flow of volute tongue.
First volute tongue 31 also has top surface 315, is in horizontal plane, as the top surface of entire volute tongue structure 3, top surface 315 and the
One leading flank, 312 intersection, the separate intersection point with 1 junction of spiral case are vertex O1, and the first tongue 311 is in the first leading flank 312
On upper extreme point (vertex that circular arc is located above) and vertex O1 between the first line l1 and the angle of horizontal direction be β1, the
Second line l2 of one tongue 311 between the upper extreme point (vertex that circular arc is located above) and vertex O1 of the first trailing flank 313
Angle between the first line l1 is β2, in the upper extreme point of the first sectional median plane 314, (circular arc is located above the first tongue 311
Vertex) and vertex O1 between third line l3 and the angle of the second line l2 be β3。
First tongue 311 exists in the lower extreme point (the underlying vertex of circular arc) of the first leading flank 312 and the second tongue 321
By the first circular arc L1 transition between the upper extreme point of second leading flank 322, the center of circle of first circular arc L1 is impeller 2 in shroud 21
Central point O, the radius R of corresponding position7；Lower extreme point (circular arc underlying top of first tongue 311 in the first trailing flank 313
Point) and the second tongue 321 between the upper extreme point of the second trailing flank 323 by the second circular arc L2 transition, second circular arc L2's
The center of circle is central point O, radius R of the impeller 2 in 22 corresponding position of hub disk9；First tongue 311 is under the first sectional median plane 314
Endpoint (the underlying vertex of circular arc) and the second tongue 321 pass through third circle between the upper extreme point of the second sectional median plane 324
Arc L3 transition, the center of circle of third circular arc L3 are central point O, radius R of the impeller 2 in 23 corresponding position of mid-game8。
The close line between the 2 central point O of endpoint and respective impeller of 1 junction of spiral case of second circular arc L2 and vertical side
To angle be α1；The close line between the 2 central point O of endpoint and respective impeller of 1 junction of spiral case of first circular arc L1 with
The angle of vertical direction is α2；Third circular arc L3 is close between the 2 central point O of endpoint and respective impeller of 1 junction of spiral case
The angle of line and vertical direction is α3。
Second volute tongue 32 also has bottom surface 325, is plane, as the bottom surface of entire volute tongue structure 3, with the second volute tongue 32
Bottom surface 325 is parallel and the distance between bottom surface 325 of the plane tangent with the contour line L of impeller 2 and the second volute tongue 32 is t
(gap i.e. between volute tongue structure 3 and impeller 2 is t).
Above-mentioned parameter meets following relationship: α1=19 °~21 °, α2=α1± (2 °~4 °), α3=α1± (5 °~7 °)；β1
=116 °~118 °, β2=4 °~6 °, β3=3 °~5 °；T=(10~12) mm, R7=R8=R9=t+ (3~5) mm, it is preferred that
R7=130mm, t=10mm.
Volute tongue structure 3 periodically goes out stream to impeller 2 and acts on, and the first volute tongue 31 can weaken air-flow and make to its impact
With, the separation of flow phenomenon and pressure fluctuation on weakening 3 surface of volute tongue structure, and then reduce noise.The volute tongue radius of front and back disk two sides is big
Volute tongue radius at mid-game can preferably reduce the secondary back of front and back Pan Chu, promote fan efficiency.Second volute tongue 32 is more
Close to 1 inside of spiral case, the region relatively lower speed in 1 interior air-flow of spiral case meets air-flow along axial changing rule
Conic section distribution can flow back into row buffering and rectification to volute tongue gap location, weaken air-flow in the separation of flow of volute tongue, promote wind
The static pressure and efficiency of machine.The half period phase in addition, the first volute tongue 31 and the second volute tongue 32 are staggered, can be preferably to volute tongue table
The separation of flow in face carries out rectified action, in the noise frequency and the second volute tongue 32 of the unsteady effect generation of 31 airflow on surface of the first volute tongue
The noise phase inter-modulation that airflow function generates, and then improve sound quality, reduce noise.Referring to Fig. 7, implementation of the present invention is shown
The performance curve of the volute tongue structure of the volute tongue structure and prior art of example compares, wherein realizing indicates volute tongue structure of the present invention
Performance curve, dotted line indicate the performance curve of prior art volute tongue structure.
Claims (8)
1. a kind of volute tongue structure, described including the first volute tongue (31) and the second volute tongue (32) being located at below the first volute tongue (31)
The outside of first volute tongue (31) is in from rear and front end to intermediate, gradually outwardly projecting outer gibbosity, it is characterised in that: described second
The outside of volute tongue (32) is in from rear and front end to intermediate, gradually inwardly projecting inner concavity.
2. a kind of centrifugal blower for applying volute tongue structure as described in claim 1, including spiral case (1) and setting are in spiral case (1)
Interior impeller (2), the impeller (2) are double intake air impellers, it is characterised in that: the inside of first volute tongue (31) and the second snail
The inside of tongue (32) is connect with spiral case (1) inner wall, the outside of first volute tongue (31) and the outside difference of the second volute tongue (32)
For the separate side with spiral case (1) junction, the front-rear direction is the axial direction of impeller (2), the second volute tongue (32) indent
The most recess of shape relative to the first volute tongue (31) outer gibbosity most highlight closer to the junction with spiral case (1).
3. centrifugal blower according to claim 2, it is characterised in that: the impeller (2) includes shroud (21), hub disk
(22), the mid-game (23) being arranged between shroud (21) and hub disk (22), the most highlight of the first volute tongue (31) outer gibbosity,
The most recess of second volute tongue (32) inner concavity is corresponding with mid-game (23) respectively, thus the first volute tongue (31) and the second volute tongue
(32) unsymmetric structure is constituted.
4. centrifugal blower according to claim 3, it is characterised in that: first volute tongue (31) has and impeller (2)
Corresponding first leading flank (312) of shroud (21), the first trailing flank (313) corresponding with hub disk (22) of impeller (2) and with
Corresponding first sectional median plane (314) of the mid-game (23) of impeller (2), first volute tongue (31) further include positioned at the first of outside
Tongue (311), first tongue (311) are arc surface in the section in impeller (2) axial direction and are directed away from and snail
The direction of shell (1) junction is prominent, and radius of first tongue (311) at the first leading flank (312) is R1, described first
Radius of the tongue (311) at the first trailing flank (313) is R3, first tongue (311) is at the first sectional median plane (314)
Radius be R2, above three radius meets following relationship: R1、R3It is all larger than R2。
5. centrifugal blower according to claim 4, it is characterised in that: the above three radius of first tongue (311)
Meet following relationship: R1:R2=1.4~1.6；R3:R2=1.1~1.3.
6. centrifugal blower according to claim 4 or 5, it is characterised in that: second volute tongue (32) has and impeller (2)
Corresponding second leading flank (322) of shroud (21), the second trailing flank (323) corresponding with hub disk (22) of impeller (2) and
The second sectional median plane (324) corresponding with mid-game (23) of impeller (2), second leading flank (322) is by the first leading flank
(313) bottom edge extends downwardly and is formed, and second trailing flank (323) is extended downwardly by the bottom edge of the first trailing flank (313)
And formed, second sectional median plane (324) is extended downwardly by the bottom edge of the second sectional median plane (313) and is formed；Described second
Volute tongue (32) further includes the second tongue (321) positioned at outside, and first tongue (321) is in cutting in impeller (2) axial direction
Face is arc surface and is directed away from prominent with the direction of spiral case (1) junction, and second tongue (321) is before second
Radius at side (322) is R4, radius of second tongue (321) at the second trailing flank (323) is R6, described second
Radius of the tongue (321) at the second sectional median plane (324) is R5, above three radius meets following relationship: R4、R6It is not small
In R5。
7. centrifugal blower according to claim 6, it is characterised in that: the above three radius of second tongue (321)
Meet following relationship: R4:R5=1~1.3；R6:R5=1~1.3.
8. centrifugal blower according to claim 6, it is characterised in that: first volute tongue (31) also has top surface (315),
The top surface (315) and the first leading flank (312) intersection, the separate intersection point with spiral case (1) junction are vertex (O1), described
First line (l1) of first tongue (311) between the upper extreme point on the first leading flank (312) and vertex (O1) and level side
To angle be β1, second company of first tongue (311) between the upper extreme point and vertex (O1) of the first trailing flank (313)
Angle between line (l2) and the first line (l1) is β2, first tongue (311) is in the upper of the first sectional median plane (314)
The angle of third line (l3) and the second line (l2) between endpoint and vertex (O1) is β3；First tongue (311) exists
The lower extreme point and the second tongue (321) of first leading flank (312) pass through the first circle between the upper extreme point of the second leading flank (322)
Arc (L1) transition, the center of circle of first circular arc (L1) are that central point (O), radius of the impeller (2) in shroud (21) corresponding position are
R7, first tongue (311) the first trailing flank (313) lower extreme point and the second tongue (321) in the second trailing flank (323)
Upper extreme point between by the second circular arc (L2) transition, the center of circle of second circular arc (L2) is that impeller (2) are right in hub disk (22)
Central point (O), the radius R that should locate9, lower extreme point and second tongue of first tongue (311) in the first sectional median plane (314)
Portion (321) passes through third circular arc (L3) transition between the upper extreme point of the second sectional median plane (324), the third circular arc (L3)
The center of circle is central point (O), the radius R of impeller (2) in mid-game (23) corresponding position8；Second circular arc (L2) is close and spiral case
(1) angle of the line between the endpoint of junction and respective impeller (2) central point (O) and vertical direction is α1, described first
The close line and vertical direction between the endpoint and respective impeller (2) central point (O) of spiral case (1) junction of circular arc (L1)
Angle be α2, the close endpoint and respective impeller (2) central point (O) with spiral case (1) junction of the third circular arc (L3) it
Between line, with the angle of vertical direction be α3；Gap between the volute tongue structure and impeller (2) is t, and above-mentioned parameter meets
Following relationship: α1=19 °~21 °, α2=α1± (2 °~4 °), α3=α1± (5 °~7 °), β1=116 °~118 °, β2=4 °~
6 °, β3=3 °~5 °, R7=R8=R9=t+ (3~5) mm.
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| CN201910463502.0A CN110159591B (en) | 2019-05-30 | 2019-05-30 | Volute tongue structure and centrifugal fan applying same |
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| CN201910463502.0A CN110159591B (en) | 2019-05-30 | 2019-05-30 | Volute tongue structure and centrifugal fan applying same |
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| CN110159591A true CN110159591A (en) | 2019-08-23 |
| CN110159591B CN110159591B (en) | 2020-10-27 |
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| CN (1) | CN110159591B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109424586A (en) * | 2017-08-31 | 2019-03-05 | 宁波方太厨具有限公司 | A kind of volute tongue structure for radial fan |
| CN111521365A (en) * | 2020-05-18 | 2020-08-11 | 南京航空航天大学 | Adjustable frequency and phase unsteady flow control experimental device based on rotary slot grating |
| CN112879349A (en) * | 2021-01-15 | 2021-06-01 | 宁波方太厨具有限公司 | Air inlet device, fan system with air inlet device and cleaning machine |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6677564B1 (en) * | 2002-07-24 | 2004-01-13 | Lg Electronics Inc. | Blower apparatus |
| JP2007146817A (en) * | 2005-11-30 | 2007-06-14 | Daikin Ind Ltd | Multiblade centrifugal blower |
| CN102518603A (en) * | 2011-12-19 | 2012-06-27 | 海尔集团公司 | Fan of range hood and range hood provided with same |
| CN103629155A (en) * | 2013-06-17 | 2014-03-12 | 余姚风机总厂 | Anti-abrasion fan |
| CN104343732A (en) * | 2014-08-29 | 2015-02-11 | 宁波方太厨具有限公司 | Volute tongue structure of fan for range hood |
| CN207080415U (en) * | 2017-08-31 | 2018-03-09 | 宁波方太厨具有限公司 | A kind of radial fan snail tongue structure |
| CN207080414U (en) * | 2017-08-31 | 2018-03-09 | 宁波方太厨具有限公司 | A kind of snail tongue structure for radial fan |
| CN108612674A (en) * | 2018-03-22 | 2018-10-02 | 海信科龙电器股份有限公司 | A kind of centrifugal blower and air conditioner |
-
2019
- 2019-05-30 CN CN201910463502.0A patent/CN110159591B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6677564B1 (en) * | 2002-07-24 | 2004-01-13 | Lg Electronics Inc. | Blower apparatus |
| JP2007146817A (en) * | 2005-11-30 | 2007-06-14 | Daikin Ind Ltd | Multiblade centrifugal blower |
| CN102518603A (en) * | 2011-12-19 | 2012-06-27 | 海尔集团公司 | Fan of range hood and range hood provided with same |
| CN103629155A (en) * | 2013-06-17 | 2014-03-12 | 余姚风机总厂 | Anti-abrasion fan |
| CN104343732A (en) * | 2014-08-29 | 2015-02-11 | 宁波方太厨具有限公司 | Volute tongue structure of fan for range hood |
| CN207080415U (en) * | 2017-08-31 | 2018-03-09 | 宁波方太厨具有限公司 | A kind of radial fan snail tongue structure |
| CN207080414U (en) * | 2017-08-31 | 2018-03-09 | 宁波方太厨具有限公司 | A kind of snail tongue structure for radial fan |
| CN108612674A (en) * | 2018-03-22 | 2018-10-02 | 海信科龙电器股份有限公司 | A kind of centrifugal blower and air conditioner |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109424586A (en) * | 2017-08-31 | 2019-03-05 | 宁波方太厨具有限公司 | A kind of volute tongue structure for radial fan |
| CN109424586B (en) * | 2017-08-31 | 2024-01-16 | 宁波方太厨具有限公司 | Volute tongue structure for radial flow fan |
| CN111521365A (en) * | 2020-05-18 | 2020-08-11 | 南京航空航天大学 | Adjustable frequency and phase unsteady flow control experimental device based on rotary slot grating |
| CN112879349A (en) * | 2021-01-15 | 2021-06-01 | 宁波方太厨具有限公司 | Air inlet device, fan system with air inlet device and cleaning machine |
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|---|---|
| CN110159591B (en) | 2020-10-27 |
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