CN209483637U - With front shroud blade and notch without spiral case centrifugal fan - Google Patents
With front shroud blade and notch without spiral case centrifugal fan Download PDFInfo
- Publication number
- CN209483637U CN209483637U CN201821971522.6U CN201821971522U CN209483637U CN 209483637 U CN209483637 U CN 209483637U CN 201821971522 U CN201821971522 U CN 201821971522U CN 209483637 U CN209483637 U CN 209483637U
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- China
- Prior art keywords
- front shroud
- blade
- primary blades
- splitterr vanes
- shroud
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- 230000003014 reinforcing effect Effects 0.000 claims abstract description 29
- 210000003205 muscle Anatomy 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims 2
- 238000000926 separation method Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 101100334009 Caenorhabditis elegans rib-2 gene Proteins 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
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Abstract
The utility model discloses with front shroud blade and notch without spiral case centrifugal fan.Radial velocity is that Voluteless fan loses main cause.The utility model includes front shroud blade, front shroud blade reinforcing rib, front shroud splitterr vanes, front shroud, primary blades splitterr vanes, back shroud, primary blades and primary blades reinforcing rib.The utility model is converted into radial velocity for circumferential speed is exported by primary blades splitterr vanes and front shroud splitterr vanes, and primary blades splitterr vanes and front shroud splitterr vanes are effectively improved exit gas mobility status, reduce separation vortex generation and Secondary Flow caused by flow losses；Notch is opened up in front shroud and back shroud, further radial velocity is converted by outlet circumferential speed, promotes acting ability；The side opposite with front shroud is cambered surface on back shroud, reduces kinetic energy rejection caused by axial impact when air-flow enters centrifugal fan；Reinforcing rib promotes blade strength, guarantees blade acting ability under high revolving speed.
Description
Technical field
The utility model belongs to field of fluid machinery, is related to no spiral case centrifugal fan, and in particular to a kind of band front shroud
Blade and notch without spiral case centrifugal fan.
Background technique
Centrifugal fan belongs to fluid machinery scope, is applied to every field in industrial production.In recent years, without spiral case wind
The outstanding representation of machine has obtained the concern of domestic and international expert.Voluteless fan has the centrifugal blower of spiral case, advantage compared to tradition
Be: no surge phenomenon, high-efficient, noise is low, is easily installed.But without the radial velocity at volute casing centrifugal blower fan impeller outlet
It cannot be efficiently converted into circumferential speed, radial velocity is caused to become Voluteless fan loss main cause.
Meanwhile the research conditions of blower interior flowing are shown in blower rotary course at present, the generation of separation vortex
With separate, Secondary Flow, the comprehensive function of the Complex Flows such as tail-jet stream is the principal element for leading to blower interior flow losses.
Improve runner internal flow, is the possible ways for promoting fan efficiency.
Summary of the invention
The purpose of this utility model be in view of the deficiencies of the prior art, provide it is a kind of with front shroud blade and notch without snail
Shell centrifugal fan promotes exit static pressure and static pressure efficiency without spiral case centrifugal fan and is promoted.
The utility model includes front shroud blade, front shroud blade reinforcing rib, front shroud splitterr vanes, front shroud, main lobe
Piece splitterr vanes, back shroud, primary blades and primary blades reinforcing rib；The side opposite with back shroud is evenly distributed weldering on front shroud
It is connected to multi-disc front shroud blade, and front shroud is welded with a piece of front shroud between every adjacent two panels front shroud blade on the side
Splitterr vanes；It is equipped with front shroud blade reinforcing rib between every front shroud blade and adjacent two panels front shroud splitterr vanes, covers
It is welded respectively with front shroud blade and front shroud splitterr vanes at plate leaf piece reinforcing rib both ends；Edge is equipped between front shroud and back shroud
Circumferentially uniformly distributed multi-disc primary blades, primary blades are welded with front shroud and back shroud；One is equipped between per adjacent two panels primary blades
Piece primary blades splitterr vanes；Primary blades splitterr vanes are welded with front shroud and back shroud；Primary blades and adjacent two panels primary blades
Two primary blades reinforcing ribs of spacing setting are equipped between splitterr vanes, and the outlet air of primary blades is arranged in primary blades reinforcing rib
At mouthful；It is welded respectively with primary blades and primary blades splitterr vanes at primary blades reinforcing rib both ends；It is opposite with front shroud on back shroud
Side is cambered surface；Front shroud and back shroud are located at the end face at air outlet and offer the multiple notches being evenly distributed, and preceding
The notch circumferential position of cover board and back shroud corresponds.
The length of the front shroud splitterr vanes is the half of front shroud length of blade.
The length of the primary blades splitterr vanes is the half of main length of blade.
The thickness of the front shroud blade, front shroud splitterr vanes and primary blades splitterr vanes with the thickness of primary blades
It spends equal.
The side opposite with front shroud is by close to the cambered surface part of air intake vent and close to air outlet on the front shroud
Planar section composition, another side is by the planar section of close air intake vent, intermediate cambered surface part and close to the plane of air outlet
Part forms；Planar section spacing of the front shroud two sides at air outlet is δ, δ value in 5~10mm.
The square that the cross section of the notch is 0.5 δ in side length, the depth of notch are 0.5 δ.
The height of the front shroud blade and front shroud splitterr vanes is δ.
The back shroud offers the multiple motor installing holes being evenly distributed.
The utility model has the advantages that
Outlet dynamic pressure cannot be efficiently converted into static pressure mainly for existing Voluteless fan and designed by the utility model.This
Utility model converts radial speed for exit portion circumferential speed by installation primary blades splitterr vanes and front shroud splitterr vanes
Degree, and primary blades splitterr vanes and front shroud splitterr vanes can be effectively improved exit gas mobility status, reduce separation
Flow losses caused by the Complex Flows such as the generation in whirlpool and Secondary Flow.Notch is opened up in front shroud and back shroud, further will
Outlet circumferential speed is converted into radial velocity, effectively promotes acting ability.The utility model will be opposite with front shroud on back shroud
Lateral layout at cambered surface, kinetic energy rejection caused by axial impact when air-flow enters centrifugal fan can be reduced, and increase plus
Strengthening tendons guarantee the acting ability of the blade under high speed conditions to promote blade strength.
Detailed description of the invention
Fig. 1 is the overall structure stereogram of the utility model.
Fig. 2 is the cross-sectional view of the utility model.
Fig. 3 is the scheme of installation of front shroud blade and front shroud splitterr vanes in the utility model.
Fig. 4 is the scheme of installation of primary blades and primary blades splitterr vanes in the utility model.
In figure: 1- front shroud blade, 2- front shroud blade reinforcing rib, 3- front shroud splitterr vanes, 4- front shroud, 5- main lobe
Piece splitterr vanes, 6- back shroud, 7- primary blades, 8 primary blades reinforcing ribs.
Specific embodiment
With reference to the accompanying drawing and the utility model is further described in example.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, with front shroud blade and notch without spiral case centrifugal fan, including front cover
Plate leaf piece 1, front shroud blade reinforcing rib 2, front shroud splitterr vanes 3, front shroud 4, primary blades splitterr vanes 5, back shroud 6, master
Blade 7 and primary blades reinforcing rib 8；The installations of front shroud blade 1 and front shroud splitterr vanes 3 as shown in figure 3, on front shroud 4 with
The opposite side of back shroud 6, which is evenly distributed, is welded with multi-disc (being eight in the present embodiment) front shroud blade 1, and front shroud 4
A piece of front shroud splitterr vanes 3 are welded between every adjacent two panels front shroud blade 1 on the side；Every front shroud blade 1
Front shroud blade reinforcing rib 2,2 both ends of cover board blade reinforcing rib difference are equipped between adjacent two panels front shroud splitterr vanes 3
It is welded with front shroud blade 1 and front shroud splitterr vanes 3, guarantees the intensity of front shroud blade 1 and front shroud splitterr vanes 3；Before
The length of cover board splitterr vanes is the half of front shroud length of blade.The installation of primary blades splitterr vanes 5 and primary blades 7 such as Fig. 4
It is shown, multi-disc (being six in the present embodiment) primary blades 7 being evenly distributed, primary blades are equipped between front shroud 4 and back shroud 6
7 weld with front shroud 4 and back shroud 6；A piece of primary blades splitterr vanes 5 are equipped between per adjacent two panels primary blades 7；Primary blades
Splitterr vanes 5 are welded with front shroud 4 and back shroud 6；It is equipped between primary blades 7 and adjacent two panels primary blades splitterr vanes 5
Two primary blades reinforcing ribs 8 of spacing setting, and primary blades reinforcing rib 8 is arranged at the air outlet of primary blades 7；Primary blades are reinforced
8 both ends of muscle are welded with primary blades 7 and primary blades splitterr vanes 5 respectively, guarantee the intensity of primary blades 7 and primary blades splitterr vanes 5；
The length of primary blades splitterr vanes is the half of main length of blade.The side opposite with front shroud 4 is by close to inlet air on front shroud 4
The planar section of the cambered surface part of mouth and close air outlet forms, another side is by the planar section close to air intake vent, centre
The planar section of cambered surface part and close air outlet forms；Planar section spacing of 4 two sides of front shroud at air outlet be
δ, the δ value in 5~10mm；The side opposite with front shroud 4 is cambered surface on back shroud 6；Front shroud 4 and back shroud 6 are located at
End face at air port offers 36 notches being evenly distributed, and the notch circumferential position of front shroud 4 and back shroud 6
It corresponds；The square that the cross section of notch is 0.5 δ in side length, the depth of notch are 0.5 δ.Front shroud blade, front shroud
The thickness of splitterr vanes and primary blades splitterr vanes is equal with the thickness of primary blades, and front shroud blade and front shroud shunt leaf
The height of piece is δ.Back shroud 6 offers five motor installing holes being evenly distributed, for the output shaft end face with motor
It is connected by screw to.
Original no spiral case centrifugal fan model is compared, should be divulged information with shroud blade and being centrifuged without spiral case for splitterr vanes
Exit static pressure is promoted about 10~20Pa by machine, and static pressure efficiency promotes about 5~7%.Original blower model is defined as: be not provided with front cover
Plate leaf piece, front shroud blade reinforcing rib, front shroud splitterr vanes, primary blades splitterr vanes and primary blades reinforcing rib, front/rear cover
Plate does not open up notch, and the back shroud side opposite with front shroud 4 is plane, and remaining structure snd size is and the utility model
It is consistent without spiral case centrifugal fan.
This with front shroud blade and notch without spiral case centrifugal fan, working principle is as follows:
Motor driven back shroud 6, air-flow are entered between front shroud 4 and back shroud 6 by front shroud 4, then pass through primary blades 7
After flow out.On back shroud 6 side opposite with front shroud 4 be cambered surface, under big flow operating condition, can reduce by front shroud 4 into
The air-flow entered because axial velocity it is excessive to back shroud 6 caused by impact.Air-flow can produce when passing through primary blades 7 in primary blades suction surface
Raw separation vortex, so that circumferential speed increases when air-flow flows out.And primary blades splitterr vanes can be reduced primary blades suction surface separation vortex
Generation, and inhibit Secondary Flow, improve air-flow mobility status in the channel between primary blades and primary blades splitterr vanes, increase
Radial velocity when big air-flow outflow, promotes fan efficiency.Under big flow operating condition, primary blades reinforcing rib 8 guarantees 7 He of primary blades
The intensity of primary blades splitterr vanes, and primary blades reinforcing rib 8 is arranged at 7 air outlet of primary blades, can further suppress secondary
Stream, improvement air-flow mobility status in the channel between primary blades and primary blades splitterr vanes.After air-flow flows out primary blades 7,
Forward and backward cover board air outlet position generates vortex.Notch, front shroud blade and the front shroud splitterr vanes 3 of front shroud can be effective
The vortex at front shroud air outlet is destroyed, reflux is reduced, the notch of back shroud can effectively destroy the whirlpool at back shroud air outlet
Stream, and the notch of forward and backward cover board converts radial velocity for the circumferential speed of air-flow at forward and backward cover board air outlet respectively, it is right
Circumferential air-flow does work, and promotes fan efficiency.Under big flow operating condition, front shroud blade reinforcing rib 2 guarantees front shroud blade
With the intensity of front shroud splitterr vanes 3.
Claims (8)
1. with front shroud blade and notch without spiral case centrifugal fan, including it is front shroud blade, front shroud blade reinforcing rib, preceding
Cover board splitterr vanes, front shroud, primary blades splitterr vanes, back shroud, primary blades and primary blades reinforcing rib, it is characterised in that: preceding
The side opposite with back shroud, which is evenly distributed, on cover board is welded with multi-disc front shroud blade, and front shroud every phase on the side
A piece of front shroud splitterr vanes are welded between adjacent two panels front shroud blade；Every front shroud blade and adjacent two panels front shroud point
Front shroud blade reinforcing rib is equipped between stream blade, cover board blade reinforcing rib both ends are divided with front shroud blade and front shroud respectively
Flow blade welding；The multi-disc primary blades being evenly distributed, primary blades and front shroud and rear cover are equipped between front shroud and back shroud
Plate welds；A piece of primary blades splitterr vanes are equipped between per adjacent two panels primary blades；Primary blades splitterr vanes and front shroud and
Back shroud welds；Two primary blades that spacing setting is equipped between primary blades and adjacent two panels primary blades splitterr vanes are reinforced
Muscle, and primary blades reinforcing rib is arranged at the air outlet of primary blades；Primary blades reinforcing rib both ends respectively with primary blades and primary blades
Splitterr vanes welding；The side opposite with front shroud is cambered surface on back shroud；Front shroud and back shroud are located at the end at air outlet
Face offers the multiple notches being evenly distributed, and the notch circumferential position of front shroud and back shroud corresponds.
2. it is according to claim 1 with front shroud blade and notch without spiral case centrifugal fan, it is characterised in that: it is described
The length of front shroud splitterr vanes is the half of front shroud length of blade.
3. it is according to claim 1 with front shroud blade and notch without spiral case centrifugal fan, it is characterised in that: it is described
The length of primary blades splitterr vanes is the half of main length of blade.
4. it is according to claim 1 with front shroud blade and notch without spiral case centrifugal fan, it is characterised in that: it is described
Front shroud blade, the thickness of front shroud splitterr vanes and primary blades splitterr vanes it is equal with the thickness of primary blades.
5. it is according to claim 1 with front shroud blade and notch without spiral case centrifugal fan, it is characterised in that: it is described
Front shroud on the side opposite with front shroud be made of the cambered surface part close to air intake vent and the planar section close to air outlet,
Another side is formed by the planar section of close air intake vent, intermediate cambered surface part and close to the planar section of air outlet；Front cover
Planar section spacing of the plate two sides at air outlet is δ, δ value in 5~10mm.
6. it is according to claim 5 with front shroud blade and notch without spiral case centrifugal fan, it is characterised in that: it is described
The square that the cross section of notch is 0.5 δ in side length, the depth of notch are 0.5 δ.
7. it is according to claim 5 with front shroud blade and notch without spiral case centrifugal fan, it is characterised in that: it is described
The height of front shroud blade and front shroud splitterr vanes is δ.
8. it is according to any one of claim 1 to 7 with front shroud blade and notch without spiral case centrifugal fan, it is special
Sign is: the back shroud offers the multiple motor installing holes being evenly distributed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821971522.6U CN209483637U (en) | 2018-11-26 | 2018-11-26 | With front shroud blade and notch without spiral case centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821971522.6U CN209483637U (en) | 2018-11-26 | 2018-11-26 | With front shroud blade and notch without spiral case centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209483637U true CN209483637U (en) | 2019-10-11 |
Family
ID=68117294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821971522.6U Expired - Fee Related CN209483637U (en) | 2018-11-26 | 2018-11-26 | With front shroud blade and notch without spiral case centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209483637U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114738317A (en) * | 2022-05-10 | 2022-07-12 | 浙江尚扬通风设备有限公司 | Low-loss impeller assembly for centrifugal fan and fan with same |
-
2018
- 2018-11-26 CN CN201821971522.6U patent/CN209483637U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114738317A (en) * | 2022-05-10 | 2022-07-12 | 浙江尚扬通风设备有限公司 | Low-loss impeller assembly for centrifugal fan and fan with same |
| CN114738317B (en) * | 2022-05-10 | 2024-03-26 | 浙江尚扬通风设备有限公司 | Impeller assembly for low-loss centrifugal fan and fan with impeller assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191011 Termination date: 20201126 |