CN107965475A - A kind of noise reducing type radial fan - Google Patents
A kind of noise reducing type radial fan Download PDFInfo
- Publication number
- CN107965475A CN107965475A CN201710322394.6A CN201710322394A CN107965475A CN 107965475 A CN107965475 A CN 107965475A CN 201710322394 A CN201710322394 A CN 201710322394A CN 107965475 A CN107965475 A CN 107965475A
- Authority
- CN
- China
- Prior art keywords
- impeller
- baffle liner
- circle
- noise reducing
- reducing type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- F04D29/663—Sound attenuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- 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
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
There is end to enclose, be provided with spiral case and the corresponding inlet air mouth circle of air inlet for a kind of noise reducing type radial fan, including spiral case and the impeller in spiral case, the rear and front end of impeller, it is characterised in that：At end, the periphery of circle is provided with baffle liner, also, baffle liner externally protrudes out in end circle in the radial direction in impeller, to expanding outside impeller on the axis direction of impeller.The baffle liner of the noise reducing type radial fan externally protrudes out in end circle in the radial direction impeller, expanded on impeller axis direction to impeller outside portion, at the circle of end local losses and air-flow leakage reversed flow can be reduced after flaring, at the same time, under high back pressure low flow rate condition, high-speed jet at baffle liner can also further reduce flow leakage reflux, and then improve fan efficiency.In addition, after setting through hole on flow guiding disc, high-speed flow can preferably turn on the region between draught fan wheel disc and inlet air mouth circle, the pressure difference between impeller inlet and impeller outlet be reduced, so as to eliminate part eddy flow to reduce fan noise.
Description
Technical field
The present invention relates to a kind of wind turbine, more particularly, to a kind of noise reducing type radial fan.
Background technology
Traditional range hood uses radial fan (i.e. centrifugal blower), it is mainly characterized by profile ID and outside diameter
The ratio between it is bigger, generally between 0.8~0.9, blade passage is narrow, accelerates fast, and air-flow, which sucks from current collector and enters blade, to be led to
Road, then accelerates outflow under impeller turning effort, to spiral case in after slow down again dynamic pressure be converted into static pressure, therefore blade is gone out
Speed is whole system highest near mouthful, can reach 12-20m/s substantially.When high-speed flow comes out from runner between blade
When can produce sudden expansion because axis direction suddenly change, producing larger local losses, (flow velocity is higher, the loss that sudden expansion produces
It is bigger).Meanwhile naturally occurring larger space between current collector and impeller end circle, the air-flow of outflow can produce the two of axis direction
Secondary stream, can partly enter the region and produce reflux, while insert space has connected impeller inlet and impeller outlet, naturally occurring compared with
Big pressure difference, easily produces whirlpool, particularly when under the larger operating mode of resistance to flow output, reflux and whirlpool are more obvious.
Secondary back is formed in order to prevent, usually the axial length of impeller is processed longer in the prior art, although
Secondary back can be effectively prevented at this time, ensures the performance of wind turbine, still, due to gap between impeller end circle and inlet air mouth circle
Too small, wind turbine in the process of running, tends to occur rub or collides, seriously affect wind turbine between impeller end circle and inlet air mouth circle
Quality.As an improvement, the China of Patent No. 201520628155.X (Authorization Notice No. is 204828039 U of CN) is practical new
Disclosed in type patent《A kind of impeller and centrifugal fan and air-conditioning with the impeller》, which includes wheel hub and multiple leaves
Piece, is additionally provided with reinforcing rib on the radial outer end of wheel hub, also, reinforcing rib is arranged on axial direction than the axial length of wheel hub
It is long, although the impeller can effectively prevent the segment fluid flow after impeller from returning again into impeller eye, effectively reduce two
The formation of secondary reflux, also, the gap being also effectively ensured between impeller end circle and inlet air mouth circle will not be too small, still, the impeller
Can not be formed about high-speed jet in impeller end circle further to reduce leakage and reflux, moreover, also can not reduce and eliminate into
The part vortex between impeller end circle is enclosed in air port.
The content of the invention
First technical problem to be solved by this invention is to be directed to above-mentioned state of the art, there is provided one kind can be effective
Reduce the noise reducing type radial fan of local losses and air-flow leakage reversed flow.
Second technical problem to be solved by this invention is to be directed to above-mentioned state of the art, there is provided one kind can be reduced
The noise reducing type radial fan of part whirlpool between inlet air mouth circle and impeller end circle.
Technical solution is used by the present invention solves above-mentioned first technical problem：The noise reducing type radial fan, bag
Include spiral case and the impeller in spiral case, there is end to enclose for the rear and front end of the impeller, is provided with the spiral case and wind turbine
The corresponding inlet air mouth circle of air inlet, it is characterised in that：At the end, the periphery of circle is provided with baffle liner, also, the water conservancy diversion
Enclose and externally protrude out in the end circle in the radial direction in impeller, expanded on the axis direction of impeller to impeller outside portion.
Technical solution is used by the present invention solves above-mentioned second technical problem：The noise reducing type radial fan is in institute
Through hole is provided with the baffle liner stated, the through hole is distributed along the circumferencial direction of baffle liner.In this way, the high speed near impeller outlet
Jet stream can preferably turn on the region between draught fan wheel disc and inlet air mouth circle by through hole, reduce impeller inlet and impeller outlet
Between pressure difference, so as to eliminate part eddy flow and reduce fan noise.
In order to further improve the water conservancy diversion effect of baffle liner, the medial surface of the baffle liner is arc guide face, and the arc
Shape guide face is convex surface.
Further preferably, the internal diameter d of the baffle liner3With impeller outer diameter D2Meet d3=aD2,a∈(0.8,1].Work as water conservancy diversion
When circle internal diameter is identical with impeller outer diameter, baffle liner can be welded on impeller end circle or be integrated part with end circle, work as baffle liner
Internal diameter d3Less than impeller outer diameter D2When, baffle liner can be welded or be fixed by screws on the circle of end.
Further preferably, the internal diameter d of the baffle liner (4)4With impeller (2) outer diameter D2Meetb∈(1,
5], r ∈ [- 3,3], and r ≠ 1.
Further preferably, the height h of the baffle liner, the width B of spiral case (1) and impeller height H meetS∈[0.2,1)。
In order to further improve the effect that baffle liner eliminates eddy flow, the percent opening of the baffle liner is 20%~70%.
Compared with prior art, the advantage of the invention is that：The noise reducing type radial fan in the periphery of end circle by setting
Baffle liner is equipped with, and baffle liner externally protrudes out in end circle in the radial direction in impeller, to outside impeller on the axis direction of impeller
Expansion, local losses and air-flow leakage reversed flow can be reduced at circle after flaring by holding, meanwhile, under the operating mode of the small flow of high back pressure,
High-speed jet at baffle liner can also further reduce flow leakage reflux, and then improve fan efficiency.In addition, impeller outlet is attached
Near high-speed jet can preferably turn on the region between draught fan wheel disc and inlet air mouth circle by through hole, reduce impeller inlet with
Pressure difference between impeller outlet, so as to eliminate part eddy flow to reduce fan noise.
Brief description of the drawings
Fig. 1 is the structure diagram of the embodiment of the present invention；
Fig. 2 is the structure sectional view for the range hood for being provided with the embodiment of the present invention；
Fig. 3 is the enlarged diagram of the part A of Fig. 2；
Fig. 4 is the air-flow schematic diagram of the blower interior of the embodiment of the present invention；
Fig. 5 is the sectional view of the range hood of the embodiment of the present invention；
Fig. 6 is the sectional view of the range hood of the embodiment of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with attached drawing embodiment.
As shown in Figures 1 to 4, the noise reducing type radial fan in the present embodiment, including spiral case 1 and in spiral case 1
Impeller 2, the wind turbine are single air intake blower fan, are provided with spiral case 1 and the corresponding inlet air mouth circle 3 of air inlet.Impeller 2
Rear and front end is respectively provided with end circle 21, and at end, the periphery of circle 21 is provided with baffle liner 4, also, the baffle liner 4 is in the radial direction of impeller 2
End circle 21 is externally protruded out on direction, baffle liner 4 is expanded on the axis direction of impeller 2 to the outside portion of impeller 2.Especially, water conservancy diversion
The medial surface of circle 4 is arc guide face, and the arc guide face is convex surface.In addition, through hole 41, through hole are provided with baffle liner 4
41 are distributed for aperture and along the circumferencial direction of baffle liner 4, and percent opening is 20%~70%.
As shown in Figure 5 and Figure 6, the internal diameter of impeller 2 is D1, 2 outside diameter of impeller is D2, the internal diameter d of baffle liner 43With outside impeller 2
Footpath D2Meet d3=aD2,a∈(0.8,1].When 4 internal diameter of baffle liner is identical with 2 outside diameter of impeller, baffle liner 4 can be welded on leaf
Part is integrated on wheel end circle 21 or with end circle 21, as the internal diameter d of baffle liner 43Less than 2 outer diameter D of impeller2When, baffle liner 4 can be with
Weld or be fixed by screws on end circle 21.
The internal diameter d of baffle liner 44With the outer diameter D of impeller 22MeetB ∈ (1,5], r ∈ [- 3,3], and r
≠1。
The height h of baffle liner 4, the width B of spiral case 1 and 2 height H of impeller meetS∈[0.2,
1)。
During the blower fan work, after baffle liner 4 forms flaring at the end of impeller circle 21, it is possible to reduce local losses and air-flow
Leakage reversed flow, meanwhile, under the operating mode of the small flow of high back pressure, being formed at the high-speed jet at baffle liner 4 can also further be reduced
Flow leakage flows back, and then improves fan efficiency.In addition, the high-speed jet of 2 near exit of impeller can be more preferable by through hole 41
Ground turns on the region between draught fan wheel disc and inlet air mouth circle, the pressure difference between impeller inlet and impeller outlet is reduced, so as to eliminate
The region part eddy flow, further to reduce fan noise, improve fan efficiency.
The foregoing is merely the preferred embodiment of the present invention, it is noted that for those of ordinary skills,
Under the premise of the principle of the present invention is not departed from, a variety of remodeling or improvement can be carried out to the present invention, these are regarded as the present invention
Protection domain within.
Claims (7)
1. a kind of noise reducing type radial fan, including spiral case (1) and the impeller (2) in spiral case, the impeller (2) it is front and rear
Both ends have end circle (21), and inlet air mouth circle (3) corresponding with air inlet, its feature are provided with the spiral case (1)
It is：The periphery of end circle (21) is provided with baffle liner (4), also, the baffle liner (4) is in the radial direction side of impeller (2)
The end circle (21) is externally protruded out in upwards, is expanded on the axis direction of impeller (2) to impeller (2) outside portion.
2. noise reducing type radial fan according to claim 1, it is characterised in that：It is provided with the baffle liner (4)
Through hole (41), the through hole (41) are distributed along the circumferencial direction of baffle liner (4).
3. noise reducing type radial-flow type range hood according to claim 1, it is characterised in that：The inner side of the baffle liner (4)
Face is arc guide face, and the arc guide face is convex surface.
4. noise reducing type radial fan according to claim 1, it is characterised in that：The internal diameter d of the baffle liner (4)3With leaf
Take turns (2) outer diameter D2Meet d3=aD2,a∈(0.8,1]。
5. noise reducing type radial fan according to claim 1, it is characterised in that：The internal diameter d of the baffle liner (4)4With leaf
Take turns (2) outer diameter D2MeetB ∈ (1,5], r ∈ [- 3,3], and r ≠ 1.
6. noise reducing type radial fan according to claim 1, it is characterised in that：The height h of the baffle liner (4), snail
The width B and impeller (2) height H of shell (1) meetS∈[0.2,1)。
7. noise reducing type radial fan according to claim 1, it is characterised in that：The percent opening of the baffle liner (4) is
20%~70%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710322394.6A CN107965475A (en) | 2017-05-09 | 2017-05-09 | A kind of noise reducing type radial fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710322394.6A CN107965475A (en) | 2017-05-09 | 2017-05-09 | A kind of noise reducing type radial fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107965475A true CN107965475A (en) | 2018-04-27 |
Family
ID=61996546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710322394.6A Pending CN107965475A (en) | 2017-05-09 | 2017-05-09 | A kind of noise reducing type radial fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107965475A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237249A (en) * | 2018-11-28 | 2020-06-05 | 宁波方太厨具有限公司 | Fan system of range hood |
| CN111520358A (en) * | 2020-05-28 | 2020-08-11 | 广东洛森通风设备制造有限公司 | Fan impeller with pressurization flow-expanding air-out structure |
| CN112833049A (en) * | 2021-01-11 | 2021-05-25 | 泛仕达机电股份有限公司 | Flow collector and centrifugal fan for eliminating squeaking |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201535267U (en) * | 2009-09-30 | 2010-07-28 | 美的集团有限公司 | Fan structure of range hood |
| CN104329271A (en) * | 2014-10-29 | 2015-02-04 | 珠海格力电器股份有限公司 | Fan and air conditioner with same |
| CN205173051U (en) * | 2015-10-15 | 2016-04-20 | 常山卫邦风机有限公司 | Energy -efficient centrifugal fan's impeller front disc and air intake combination unit |
| CN205243924U (en) * | 2015-12-22 | 2016-05-18 | 安徽国茂机电设备有限公司 | Device is prevented leaking by fan air intake |
| CN106032814A (en) * | 2015-03-21 | 2016-10-19 | 重庆东宏鑫科技有限公司 | Centrifugal fan |
| CN206958002U (en) * | 2017-05-09 | 2018-02-02 | 宁波方太厨具有限公司 | A kind of noise reducing type radial fan |
-
2017
- 2017-05-09 CN CN201710322394.6A patent/CN107965475A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201535267U (en) * | 2009-09-30 | 2010-07-28 | 美的集团有限公司 | Fan structure of range hood |
| CN104329271A (en) * | 2014-10-29 | 2015-02-04 | 珠海格力电器股份有限公司 | Fan and air conditioner with same |
| CN106032814A (en) * | 2015-03-21 | 2016-10-19 | 重庆东宏鑫科技有限公司 | Centrifugal fan |
| CN205173051U (en) * | 2015-10-15 | 2016-04-20 | 常山卫邦风机有限公司 | Energy -efficient centrifugal fan's impeller front disc and air intake combination unit |
| CN205243924U (en) * | 2015-12-22 | 2016-05-18 | 安徽国茂机电设备有限公司 | Device is prevented leaking by fan air intake |
| CN206958002U (en) * | 2017-05-09 | 2018-02-02 | 宁波方太厨具有限公司 | A kind of noise reducing type radial fan |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237249A (en) * | 2018-11-28 | 2020-06-05 | 宁波方太厨具有限公司 | Fan system of range hood |
| CN111520358A (en) * | 2020-05-28 | 2020-08-11 | 广东洛森通风设备制造有限公司 | Fan impeller with pressurization flow-expanding air-out structure |
| CN112833049A (en) * | 2021-01-11 | 2021-05-25 | 泛仕达机电股份有限公司 | Flow collector and centrifugal fan for eliminating squeaking |
| CN112833049B (en) * | 2021-01-11 | 2022-11-18 | 泛仕达机电股份有限公司 | Flow collector and centrifugal fan for eliminating squeaking |
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