CN206889291U - High rotating speed low noise centrifugal fan - Google Patents
High rotating speed low noise centrifugal fan Download PDFInfo
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- CN206889291U CN206889291U CN201720323565.2U CN201720323565U CN206889291U CN 206889291 U CN206889291 U CN 206889291U CN 201720323565 U CN201720323565 U CN 201720323565U CN 206889291 U CN206889291 U CN 206889291U
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- movable vane
- vane wheel
- rotating speed
- low noise
- centrifugal fan
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Abstract
The utility model discloses a kind of high rotating speed low noise centrifugal fan, and it includes：Diffuser, movable vane wheel, fan housing and rotary shaft, movable vane wheel from top to bottom include：Piece and movable vane wheel bottom sheet in movable vane wheel upper piece, movable vane wheel, the diameter of movable vane wheel upper piece are more than the diameter of movable vane wheel bottom sheet.A kind of high rotating speed low noise centrifugal fan of utility model is simple in construction, and install convenient, cost is low, and fan efficiency is high, and noise is low.
Description
Technical field
It the utility model is related to a kind of high rotating speed low noise centrifugal fan.
Background technology
Conventional cleaners electric machine structure, particularly with centrifugal fan, impeller outlet air-flow needs 90 ° to turn, and complete machine
Fail the even transitions of 90 ° of turnings of consideration runner in structure design.The impact loss of air-flow is larger, especially in impeller outlet
High velocity, air-flow is big in turning retardance, and flowing is not smooth, reduces compressor flow.Meanwhile the vortex for also increasing blower fan is made an uproar
Sound, reduce the customer experience satisfaction of final products.
Utility model content
In order to solve the above-mentioned technical problem, the utility model proposes a kind of high rotating speed low noise centrifugal fan, the wind
Machine is simple in construction, and install convenient, cost is low, and fan efficiency is high, and noise is low.
In order to achieve the above object, the technical solution of the utility model is as follows：
High rotating speed low noise centrifugal fan, including：Diffuser, movable vane wheel, fan housing and rotary shaft, movable vane wheel is by up to
Under include：Piece and movable vane wheel bottom sheet in movable vane wheel upper piece, movable vane wheel, the diameter of movable vane wheel upper piece are more than the straight of movable vane wheel bottom sheet
Footpath.
The diameter of the utility model movable vane wheel bottom sheet is less than the diameter of movable vane wheel upper piece, so the air outlet of movable vane wheel will
There is an angle [alpha], fluid smoothly enters diffuser air channel, reduce fluid and fan housing or diffusion by the air outlet of movable vane wheel
The collision of device inwall, so as to reduce the retardance of convection body, make fluid at the uniform velocity by blower interior, so as to improve fan efficiency, drop
Low flow noise.
The utility model improves efficiency 2%, reduces cost than the lower noise 2dB-5dB of traditional type centrifugal blower.
On the basis of above-mentioned technical proposal, following improvement can be also done：
As preferable scheme, the connecting line and movable vane of the fascia edge of movable vane wheel bottom sheet to movable vane wheel upper piece fascia edge
The angle of wheel central axis is α, between α value is 12 ° to 22 °.
Using above-mentioned preferable scheme, angle α to be more than bottom, the gas after diffuser at the top of movable vane wheel muzzle velocity
Stream previously extruded can flow downward, and reduces the impact loss with casing wall, improves fan efficiency.
As preferable scheme, the end face of diffuser is provided with multiple diffusion pieces, and diffusion piece is in uniform thickness arc-shaped.
It is simple in construction using above-mentioned preferable scheme.
As preferable scheme, the leading edge of diffusion piece has scarf, and the angle of chamfer of the scarf is β, β=α.
Using above-mentioned preferable scheme, β=α, the size such as two mis-cut angles coordinates so that air-flow can smooth transition arrive
Diffusion piece, help to reduce impeller outlet enlargement loss, improve fan efficiency.
As preferable scheme, the gap between movable vane impeller blade afterbody and diffusion piece scarf is t, t be 1-3mm it
Between.
Using above-mentioned preferable scheme, air-flow can smooth transition to diffusion piece.
As preferable scheme, diffuser diffusion piece export department tilts to rotation direction of principal axis, inclination angle θ；Fan housing inwall
Tilted to rotation direction of principal axis, inclination angle is also θ；It is bonded at the top of fan housing inwall and diffusion piece, and forms oblique runner.
Using above-mentioned preferable scheme, after inclined diffusion piece causes air-flow to flow through, one is carried out to rotation direction of principal axis in advance
Determine degree turning, reduce the impact loss with wall, improve fan efficiency.
As preferable scheme, between θ is 10 ° to 35 °.
It is more reasonable using above-mentioned preferable scheme, more optimized structure, θ angles.
As preferable scheme, plastic sleeve is installed in the central hole of movable vane wheel bottom sheet, plastic sleeve is by plastics system
Into plastic sleeve includes the covering portion to extension on the outside of centre bore, is additionally provided with plastic sleeve for the rotation with drive device
The installation through-hole of rotating shaft connection.
Using above-mentioned preferable scheme, plastic sleeve is made by the way of plastics are directly molded into movable vane wheel bottom sheet, protects
Demonstrate,prove plastic sleeve and movable vane wheel bottom sheet and form integral structure, can effectively ensure the concentric of movable vane wheel bottom sheet and plastic sleeve
Degree and jump degree.Dimensionally, plastic sleeve can be selected the mode of injection and be installed, and size is more precisely and stably.In weight
On, plastic sleeve is lighter than plain bushing and metallurgical powder bushing.Plastic sleeve directly bears against drive device using interference fit
Rotary shaft on, realize clamping with the rotary shaft of drive device, install convenient, quickly, guarantee size that can be well it is consistent
Property, reduce the vibration of drive device.
As preferable scheme, be provided with multiple reinforced holes around the centre bore of movable vane wheel bottom sheet, multiple reinforced holes around
The center of centre bore is circularly and evenly distributed, covering portion covering reinforced hole.
Using above-mentioned preferable scheme, the reinforced hole of setting so that during injection, under plastic sleeve and movable vane wheel
Piece can be combined preferably, improve injection axle sleeve and the degree of being connected firmly of movable vane wheel bottom sheet.
As preferable scheme, n word grooves are provided with the air inlet of fan housing, the flange of movable vane wheel is stretched into the n word grooves.
Using above-mentioned preferable scheme, convection body realizes clearance seal, not only reduces technology difficulty, reduces manufacturing cost,
And blower fan is set to be maintained at best efficiency point operation for a long time.
Brief description of the drawings
Fig. 1 is the sectional view for the movable vane wheel that the utility model embodiment provides.
Fig. 2 is the sectional view for the high rotating speed low noise centrifugal fan that the utility model embodiment provides.
Fig. 3 is the structural representation for the high rotating speed low noise centrifugal fan that the utility model embodiment provides.
Wherein：Piece in 1 diffuser, 11 diffusion pieces, 2 movable vane wheels, 21 movable vane wheels upper piece, 22 movable vane wheels, 23 movable vane wheel bottom sheet,
231 centre bores, 232 reinforced holes, 3 fan housings, 4 plastic sleeves, 41 covering portion, 42 installation through-holes, 5n word grooves.
Embodiment
Describe preferred embodiment of the present utility model in detail below in conjunction with the accompanying drawings.
In order to reach the purpose of this utility model, in some of embodiments of high rotating speed low noise centrifugal fan,
As shown in Figure 1-2, high rotating speed low noise centrifugal fan includes：Diffuser 1, movable vane wheel 2, fan housing 3 and rotation
Axle (not shown), movable vane wheel 2 from top to bottom include：Piece 22 and movable vane wheel bottom sheet 23 in movable vane wheel upper piece 21, movable vane wheel, move
The diameter B of impeller upper piece 21 is more than the diameter A of movable vane wheel bottom sheet 23.
The diameter of the utility model movable vane wheel bottom sheet 23 is less than the diameter of movable vane wheel upper piece 21, so the air-out of movable vane wheel 2
Mouth just has an angle [alpha], and fluid smoothly enters the air channel of diffuser 1, reduce fluid and fan housing by the air outlet of movable vane wheel 2
Or the collision of diffuser inwall, so as to reduce the retardance of convection body, make fluid at the uniform velocity by blower interior, so as to improve blower fan
Efficiency, reduce flow noise.
The utility model improves efficiency 2%, reduces cost than the lower noise 2dB-5dB of traditional type centrifugal blower.
In order to further optimize implementation result of the present utility model, in other embodiment, remaining feature skill
Art is identical, and difference is, the connecting line of the fascia edge of movable vane wheel bottom sheet 23 to the fascia edge of movable vane wheel upper piece 21 with it is dynamic
The angle of the central axis of impeller 2 is α, between α value is 12 ° to 22 °.
Using above-mentioned preferable scheme, angle α to be more than bottom at the top of the muzzle velocity of movable vane wheel 2, after diffuser 1
Air-flow previously extruded can flow downward, and reduces the impact loss with casing wall, improves fan efficiency.
Further, the end face of diffuser 1 is provided with multiple diffusion pieces 11, and diffusion piece 11 is in uniform thickness arc-shaped, diffusion piece 11
Leading edge there is scarf, the angle of chamfer of the scarf is β, β=α.
Using above-mentioned preferable scheme, β=α, the size such as two mis-cut angles coordinates so that air-flow can smooth transition arrive
Diffusion piece, help to reduce impeller outlet enlargement loss, improve fan efficiency.
Further, the gap between movable vane impeller blade afterbody and diffusion piece scarf is t, and t is between 1-3mm.
Using above-mentioned preferable scheme, air-flow can smooth transition to diffusion piece 11.
In order to further optimize implementation result of the present utility model, in other embodiment, remaining feature skill
Art is identical, and difference is, the export department of diffuser diffusion piece 11 tilts to rotation direction of principal axis, inclination angle θ；The inwall of fan housing 3
Tilted to rotation direction of principal axis, inclination angle is also θ, between θ is 10 ° to 35 °；It is bonded, and is formed at the top of the inwall of fan housing 3 and diffusion piece
Oblique runner.
Using above-mentioned preferable scheme, after inclined diffusion piece causes air-flow to flow through, one is carried out to rotation direction of principal axis in advance
Determine degree turning, reduce the impact loss with wall, improve fan efficiency.
In order to further optimize implementation result of the present utility model, in other embodiment, remaining feature skill
Art is identical, and difference is, plastic sleeve 4 is provided with the centre bore 231 of movable vane wheel bottom sheet 23, plastic sleeve 4 is by moulding
Material is made, and plastic sleeve 4 includes the covering portion 41 to extension on the outside of centre bore, is additionally provided with and is used for and driving on plastic sleeve 4
The installation through-hole 42 of the rotation axis connection of device.
Using above-mentioned preferable scheme, piece 22 and movable vane wheel bottom sheet 23 are metal material in movable vane wheel upper piece 21, movable vane wheel
Material is made, and piece 22 connects with the riveting mode of movable vane wheel bottom sheet 23 in movable vane wheel；Electrophoresis process is carried out after riveting, there is inner surface
One layer of electrophoretic paint, after the completion of electrophoresis, product is subjected to Shooting Technique, completes the processing of plastic sleeve 4.Directly it is molded using plastics
Plastic sleeve 4 is made in mode to movable vane wheel bottom sheet 23, ensures that plastic sleeve 4 forms integral structure with movable vane wheel bottom sheet, can
Effectively to ensure the concentricity and jump degree of movable vane wheel bottom sheet 23 and plastic sleeve 4.Dimensionally, note can be selected in plastic sleeve 4
The mode of modeling is installed, and size is more precisely and stably.In weight, plastic sleeve 4 serves as a contrast than plain bushing and metallurgical powder
Set is lighter.Plastic sleeve 4 is directly born against in the rotary shaft of drive device, the rotary shaft reality with drive device using interference fit
Existing clamping, install convenient, quickly, the uniformity of guarantee size that can be well, reduces the vibration of drive device.It is real at other
Apply in example, multiple reinforcement (not shown)s, the center of multiple reinforcement moving impellers 23 can be provided with covering portion 41
The center in hole 231 is circularly and evenly distributed, and can effectively improve the mechanical strength of plastic sleeve 4.The section of reinforcement can be
Cross section is trapezoidal or triangle.
As shown in figure 3, further, it is provided with three reinforced holes 232 around the centre bore 231 of movable vane wheel bottom sheet 23, three
Individual reinforced hole 232 is circularly and evenly distributed around the center of centre bore 231, and covering portion 41 covers reinforced hole 232.
Using above-mentioned preferable scheme, the reinforced hole 232 of setting causes during injection, plastic sleeve 4 and movable vane
Wheel bottom sheet 23 can be combined preferably, improve injection axle sleeve 4 and the combination soundness of movable vane wheel bottom sheet 23, make the highest of movable vane wheel 2
Revolution can reach 90000 turns.
Further, bonding agent groove (not shown) is provided with movable vane wheel 2 or plastic sleeve 4.
Using above-mentioned preferable scheme, rotary shaft with movable vane wheel 2 is connected using bonding agent, in movable vane wheel 2 or plastics
Bonding agent groove is designed on axle sleeve 4, more bonding agents can be effectively retained, it is ensured that the intensity of connection.
In order to further optimize implementation result of the present utility model, in other embodiment, remaining feature skill
Art is identical, and difference is, is provided with n words groove 5 in the air inlet of fan housing 3, the flange of movable vane wheel is stretched into the n word grooves.
Using above-mentioned preferable scheme, conventional fan can encrypt sealing or EVA (sponge) at the air outlet in fan housing 3
To be sealed to air inlet to ensure the efficiency of blower fan.However, the shortcomings that so designing is 1) increase technology difficulty, 2) increase
Add manufacturing cost, 3) because abrasion reduces the life-span that blower fan uses peak efficiency.
The utility model designs n words groove 5 on fan housing 3, and the flange of movable vane wheel is stretched into n words groove 5 when assembling, is realized
Convection body clearance seal, technology difficulty is not only reduced, reduce manufacturing cost, and blower fan is maintained at best efficiency point for a long time
Operation.
The above is only preferred embodiment of the present utility model, it is noted that for one of ordinary skill in the art
For, on the premise of not departing from the utility model and creating design, various modifications and improvements can be made, these belong to this
The protection domain of utility model.
Claims (10)
1. high rotating speed low noise centrifugal fan, including：Diffuser, movable vane wheel, fan housing and rotary shaft, it is characterised in that institute
Stating movable vane wheel from top to bottom includes：Piece and movable vane wheel bottom sheet, the diameter of the movable vane wheel upper piece are big in movable vane wheel upper piece, movable vane wheel
In the diameter of the movable vane wheel bottom sheet.
2. high rotating speed low noise centrifugal fan according to claim 1, it is characterised in that outside the movable vane wheel bottom sheet
The angle of wall edge to the connecting line and the movable vane wheel central axis of the movable vane wheel upper piece fascia edge is α, and α value is
Between 12 ° to 22 °.
3. high rotating speed low noise centrifugal fan according to claim 2, it is characterised in that on the end face of the diffuser
Provided with multiple diffusion pieces, the diffusion piece is in uniform thickness arc-shaped.
4. high rotating speed low noise centrifugal fan according to claim 3, it is characterised in that the leading edge tool of the diffusion piece
There is scarf, the angle of chamfer of the scarf is β, β=α.
5. high rotating speed low noise centrifugal fan according to claim 4, it is characterised in that the movable vane impeller blade afterbody
Gap between diffusion piece scarf is t, and t is between 1-3mm.
6. the high rotating speed low noise centrifugal fan according to claim any one of 1-5, it is characterised in that the diffuser
Diffusion piece export department tilts to the rotation direction of principal axis, inclination angle θ；
The fan housing inwall tilts to the rotation direction of principal axis, and inclination angle is also θ；
It is bonded at the top of the fan housing inwall and the diffusion piece, and forms oblique runner.
7. high rotating speed low noise centrifugal fan according to claim 6, it is characterised in that between θ is 10 ° to 35 °.
8. the high rotating speed low noise centrifugal fan according to claim any one of 1-5, it is characterised in that in the movable vane
The central hole of wheel bottom sheet is provided with plastic sleeve, and the plastic sleeve is made of plastics, and the plastic sleeve is included to described
The covering portion of extension, is additionally provided with the installation for the rotation axis connection with drive device on the plastic sleeve on the outside of centre bore
Through hole.
9. high rotating speed low noise centrifugal fan according to claim 8, it is characterised in that in the movable vane wheel bottom sheet
Multiple reinforced holes are provided with around centre bore, multiple reinforced holes are circularly and evenly distributed around the center of the centre bore, institute
State covering portion and cover the reinforced hole.
10. the high rotating speed low noise centrifugal fan according to claim any one of 1-5, it is characterised in that in the wind
The air inlet of cover is provided with n word grooves, and the flange of the movable vane wheel is stretched into the n word grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720323565.2U CN206889291U (en) | 2017-03-30 | 2017-03-30 | High rotating speed low noise centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720323565.2U CN206889291U (en) | 2017-03-30 | 2017-03-30 | High rotating speed low noise centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206889291U true CN206889291U (en) | 2018-01-16 |
Family
ID=61327322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720323565.2U Active CN206889291U (en) | 2017-03-30 | 2017-03-30 | High rotating speed low noise centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206889291U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021027079A1 (en) * | 2019-08-09 | 2021-02-18 | 美的威灵电机技术（上海）有限公司 | Fan and electric appliance |
-
2017
- 2017-03-30 CN CN201720323565.2U patent/CN206889291U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021027079A1 (en) * | 2019-08-09 | 2021-02-18 | 美的威灵电机技术（上海）有限公司 | Fan and electric appliance |
| US11955876B2 (en) | 2019-08-09 | 2024-04-09 | Midea Welling Motor Technology (Shanghai) Co., Ltd. | Fan and electric appliance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 215000 No. 15, linbu street, Weiting street, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee after: Xingdesheng Technology (Suzhou) Co.,Ltd. Address before: 215000 No. 15, linbu street, Weiting street, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee before: SUZHOU INDUSTRIAL PARK SIP CINDERSON MOTOR Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |