CN105526197B - A kind of noise reduction of centrifugal blower, oil-filtering apparatus - Google Patents
A kind of noise reduction of centrifugal blower, oil-filtering apparatus Download PDFInfo
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- CN105526197B CN105526197B CN201510991010.0A CN201510991010A CN105526197B CN 105526197 B CN105526197 B CN 105526197B CN 201510991010 A CN201510991010 A CN 201510991010A CN 105526197 B CN105526197 B CN 105526197B
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- Prior art keywords
- cylinder body
- outer cylinder
- inner barrel
- oil
- centrifugal blower
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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
- F04D29/66—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
-
- 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
- F04D29/4226—Fan casings
-
- 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
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
- F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
A kind of noise reduction of centrifugal blower, oil-filtering apparatus, it is characterised in that：Including the outer cylinder body and inner barrel located at air inlet of centrifugal fan, outer cylinder body and inner barrel are forward extended out in spiral case antetheca, circular passage is formed between outer cylinder body and inner barrel, multiple apertures are provided with the annular wall of outer cylinder body and inner barrel so that the annular wall of outer cylinder body and inner barrel is at least locally in mesh-structured.The device is provided with aperture in the annular wall of inner barrel and outer cylinder body, and circular passage is formed between inner barrel and outer cylinder body, air inlet air-flow can be converted into small yardstick whirlpool by aperture, and consume a large amount of acoustic energy by being vibrated in circular passage, sound wave is vibrated in communication process between the ring wall surface of circular passage simultaneously consumes a large amount of acoustic energy, so as to improve erasure effect；In addition, the collision probability in aperture increase fluid between particle and hole wall, while the particle in fluid is further got rid of the wall to circular passage by centrifugal force of the fluid in bending, so as to strengthen filter effect.
Description
Technical field
The present invention relates to a kind of centrifugal blower, more particularly, to a kind of noise reduction of centrifugal blower, oil-filtering apparatus.
Background technology
The hush pipe of existing centrifugal blower is usually that inner barrel sleeve is kept off in outer cylinder body, and in the two ends sleeve of inner barrel
Inner barrel and outer cylinder body, are welded and fixed by plate by baffle plate, and the filling glass cotton between inner barrel and outer cylinder body, this structure
Hush pipe function it is more single, function only as the effect of noise reduction.Also disclose in the prior art it is similar with noise-reducing structure from
The Chinese utility model of heart blower fan, such as Patent No. ZL 201520234680.3 (Authorization Notice No. is the U of CN 204532914)
Disclosed in patent《A kind of modified centrifugal blower》, the centrifugal blower is by using damping base, it is ensured that fan operation
Shi Wending and noise is low, meanwhile, soft cylinder has been connected on its reducing cylinder, make its it is convenient be connected with gas outlet, meanwhile, its noise reduction
Device is fixed by outer cylinder body together with inner barrel sleeve, simple in construction, is connected firmly, and its inner barrel is plugged with round platform
Shape cylinder so that first by truncated cone-shaped cylinder noise reduction when its wind enters ventilation blower by outer end, then by inner barrel noise reduction.Although, should
After follow-on centrifugal blower is by dual noise reduction, more preferable erasure effect can be obtained, but the noise-reducing structure is also only realized
Erasure effect, function is more single.
The content of the invention
The technical problems to be solved by the invention are that there is provided a kind of simple in construction, energy is same for above-mentioned state of the art
The noise reduction of the centrifugal blower of Shi Shixian noise reductions and oil filtering function, oil-filtering apparatus.
The present invention solve the technical scheme that is used of above-mentioned technical problem for：The noise reduction of the centrifugal blower, oil-filtering apparatus, its
It is characterised by：Including the outer cylinder body and inner barrel located at air inlet of centrifugal fan, the outer cylinder body and inner barrel are forward extended out
In the spiral case antetheca of centrifugal blower, circular passage is formed between the outer cylinder body and inner barrel, in outer cylinder body and inner barrel
Annular wall on be provided with multiple apertures so that the annular wall of outer cylinder body and inner barrel is at least locally in mesh-structured.
Outer cylinder body can have a variety of mounting structures, it is preferable that be provided with air intake mouth circle in air inlet of centrifugal fan, described outer
The rear end of cylinder is arranged in air intake mouth circle, and the barrel dliameter of outer cylinder body is adapted with air intake mouth circle.
Inner barrel can have a variety of mounting structures, it is preferable that the front end of the inner barrel is forward extended out in described outer barrel
Body is simultaneously arranged on front cover plate of fan, and the rear end of the inner barrel stretches out in described outer cylinder body backward.
Outer cylinder body and inner barrel can have various structures and size relationship, it is preferable that the outer cylinder body and inner barrel are
Cylinder, the diameter D of the outer cylinder body1With the diameter D of inner barrel2Between relation be：
Further preferably, the diameter D of the outer cylinder body1=150~300mm.
Further preferably, the inner barrel is forward extended out in spiral case antetheca apart from L1With the outer cylinder body forward extend out in
Spiral case antetheca apart from L2Between relation be：
In order to improve noise reduction and oil filter effect, it is provided with the whole annular wall of the outer cylinder body and inner barrel described small
Hole, aperture d=1.0~3.0mm of the aperture, and percent opening are 70%~90%.
In order that the oil droplet filtered through inner barrel and outer cylinder body can be collected in inner barrel and outer cylinder body, it is preferable that described
Aperture be only opened in the annular wall more than outer cylinder body and inner barrel bottom, and the bottom of outer cylinder body and inner barrel is non-porous
The corresponding central angle of arc length at position is 60-150 °.So, the bottom of inner barrel and outer cylinder body is equivalent to constituting oil collecting zone
Part oil droplet on domain, inner barrel and outer cylinder body can be dropped into the oil-collecting region.
In order that the oil droplet filtered through inner barrel and outer cylinder body can be collected in the swab case below spiral case, described outer barrel
Body and inner barrel are tilted obliquely from front to back, oil leaking hole are provided with the spiral case bottom of centrifugal blower, in the oil leaking hole
Lower section is provided with swab case.
Further preferably, the front end of the swab case forms to forward extend out connects oily tongue in the outer cylinder body.So, outer barrel
Part oil droplet on body and inner barrel, which is fallen into, to be connect after oily tongue again rearwards into swab case.
Compared with prior art, the advantage of the invention is that：The device is provided with the annular wall of inner barrel and outer cylinder body
Circular passage is formed between aperture, and inner barrel and outer cylinder body, air inlet air-flow can be converted into small yardstick whirlpool by aperture,
And a large amount of acoustic energy are consumed by being vibrated in circular passage, while sound wave vibrates communication process between the ring wall surface of circular passage
In consume a large amount of acoustic energy, so as to obtain preferable erasure effect；In addition, fluid is flowing through the process of circular passage and aperture
In, the collision probability in aperture increase fluid between particle and hole wall, while centrifugal force of the fluid in bending is further by fluid
In particle get rid of wall to circular passage, so as to strengthen filter effect.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention one；
Fig. 2 is the structural representation of another angle of the embodiment of the present invention one (front cover plate of fan is housed)；
Fig. 3 is the structure sectional view of the embodiment of the present invention one；
Fig. 4 is the structural representation of the embodiment of the present invention two.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing embodiment.
Embodiment one：
As shown in Figure 1 to Figure 3, the noise reduction of the centrifugal blower in the present embodiment, oil-filtering apparatus include being located at air inlet
Outer cylinder body 1 and inner barrel 2, outer cylinder body 1 and inner barrel 2 forward extended out in spiral case antetheca 6, outer cylinder body 1 and inner barrel 2 it
Between be formed with circular passage 3, be full of aperture 4 in the whole annular wall of outer cylinder body and inner barrel so that outer cylinder body and inner barrel
Whole annular wall in mesh-structured.
In the present embodiment, the air intake mouth circle 5 of circle is installed in air inlet, correspondingly, outer cylinder body 1 is cylinder and big
Small to be adapted with air intake mouth circle 5, the rear end of outer cylinder body 1 can be fixed by welding in air intake mouth circle 5.Inner barrel 2 is also circle
Cylinder, the front end of inner barrel 2 forward extends out in outer cylinder body 1 and is fixed on front cover plate of fan 7, also, inner barrel 2 rear end backward
Stretch out in outer cylinder body 1, i.e. inner barrel 2 and extend rearward into blower interior.
Position relationship between before and after outer cylinder body 1 and inner barrel 2 is：If inner barrel 2 forward extend out in spiral case antetheca 6 away from
From for L1, in the present embodiment, L1As the distance between spiral case antetheca 6 of blower fan and front cover plate of fan 7, if outer cylinder body 1 is to extension
Distance for spiral case antetheca 6 is L2, then L1With L2Between relation be：
In the present embodiment, outer cylinder body 1 and inner barrel 2 are cylinder, if a diameter of D of outer cylinder body 11, the diameter of inner barrel 2
For D2, then D1With D2Between relation be：For different centrifugal blowers, D1And D2Numerical value respectively have not
Together, the diameter D of outer cylinder body 11Determined by the diameter of air intake mouth circle 5, it is conventional because the size of cooking-fume exhauster blower impeller is limited
Ground, the diameter D of outer cylinder body 11=150~300mm.In addition, in order to obtain optimal noise reduction and oil filter effect, the aperture d of aperture 4
=1.0~3.0mm, percent opening is 70%~90%.
In the present embodiment, outer cylinder body 1 and inner barrel 2 are horizontally disposed with from front to back, i.e., in outer cylinder body 1 and inner barrel 2
Diameter parallel is in the air intake direction of air inlet.In addition, for the ease of oil-collecting, outer cylinder body 1 and inner barrel 2 can also from front to back
Tilt obliquely.Oil leaking hole 8 is provided with the spiral case bottom of centrifugal blower, swab case 9 is provided with the lower section of oil leaking hole 8, also, connect
The front end of oil box 9 forms to forward extend out connects oily tongue 91 in outer cylinder body 1.During blower fan work, filtered through outer cylinder body 1 and inner barrel 2
Most of oil droplet drop onto backward inside the spiral case of blower fan, and by oil leaking hole 8 flow into swab case 9 in, small part oil droplet is straight
It is connected on outside blower fan to drop onto and connects on oily tongue 91, and and then rearwards into swab case 9.
The noise reduction, filter noise reduction principle it is as follows：
1), air-flow is converted into small yardstick whirlpool by aperture, and a large amount of acoustic energy are consumed by being vibrated in annular chamber；
2), sound wave vibrates between ring wall surface consumes a large amount of acoustic energy in communication process.
The noise reduction, filter through-flow and work principle of filter it is as follows：
1), the collision probability in aperture increase fluid between particle and hole wall；
2), while centrifugal force of the fluid in bending further gets rid of the particle in fluid to wall, filter effect is strengthened.
Embodiment two：
As shown in figure 4, in the present embodiment, aperture 4 is only opened in annular wall more than outer cylinder body 1 and the bottom of inner barrel 2,
So that the part of the annular wall of outer cylinder body 1 and inner barrel 2 is in mesh-structured, and the non-porous position in bottom of outer cylinder body 1 and inner barrel 2
The corresponding central angle of arc length be 60-150 °.So, oil-collecting region 10 can be formed on the bottom of outer cylinder body 1 and inner barrel 2, outside
Part oil droplet on cylinder 1 and the ring wall of inner barrel 2 can be dropped onto in the oil-collecting region 10.
It the foregoing is only 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 (10)
1. a kind of noise reduction of centrifugal blower, oil-filtering apparatus, it is characterised in that：Including the outer cylinder body located at air inlet of centrifugal fan
(1) and inner barrel (2), the outer cylinder body (1) and inner barrel (2) forward extend out the spiral case antetheca (6) in centrifugal blower, in institute
State and circular passage (3) is formed between outer cylinder body (1) and inner barrel (2), in the annular of the outer cylinder body (1) and inner barrel (2)
Multiple apertures (4) are provided with wall so that the annular wall of outer cylinder body (1) and inner barrel (2) is at least locally in mesh-structured.
2. the noise reduction of centrifugal blower according to claim 1, oil-filtering apparatus, it is characterised in that：In air inlet of centrifugal fan
Air intake mouth circle (5) is installed, the rear end of the outer cylinder body (1) is arranged in air intake mouth circle (5), and the barrel dliameter of outer cylinder body (1) with
Air intake mouth circle (5) is adapted.
3. the noise reduction of centrifugal blower according to claim 1, oil-filtering apparatus, it is characterised in that：Before the inner barrel (2)
End is forward extended out in described outer cylinder body (1) and on front cover plate of fan (7), and the rear end of the inner barrel (2) is stretched backward
For described outer cylinder body (1).
4. the noise reduction of centrifugal blower according to claim 1, oil-filtering apparatus, it is characterised in that：The outer cylinder body (1) and interior
Cylinder (2) is cylinder, the diameter D of the outer cylinder body (1)1With the diameter D of inner barrel (2)2Between relation be：
<mrow>
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<mn>1</mn>
<mn>3</mn>
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<msub>
<mi>D</mi>
<mn>1</mn>
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<mo>&le;</mo>
<msub>
<mi>D</mi>
<mn>2</mn>
</msub>
<mo>&le;</mo>
<mfrac>
<mn>2</mn>
<mn>3</mn>
</mfrac>
<msub>
<mi>D</mi>
<mn>1</mn>
</msub>
<mo>.</mo>
</mrow>
5. the noise reduction of centrifugal blower according to claim 4, oil-filtering apparatus, it is characterised in that：The outer cylinder body (1) it is straight
Footpath D1=150~300mm.
6. the noise reduction of centrifugal blower according to claim 1, oil-filtering apparatus, it is characterised in that：The inner barrel (2) is forward
Stretch out in being forward extended out apart from L1 and the outer cylinder body (1) in the pass between L2 of spiral case antetheca (6) for spiral case antetheca (6)
It is to be：
<mrow>
<mfrac>
<mn>1</mn>
<mn>3</mn>
</mfrac>
<msub>
<mi>L</mi>
<mn>1</mn>
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</mrow>
7. the noise reduction of centrifugal blower according to claim 1, oil-filtering apparatus, it is characterised in that：In the outer cylinder body (1) and
The whole annular wall of inner barrel (2) is provided with described aperture (4), aperture d=1.0~3.0mm of the aperture (4), and opens
Porosity is 70%~90%.
8. the noise reduction of centrifugal blower according to claim 1, oil-filtering apparatus, it is characterised in that：Described aperture (4) is only opened
Be located in the annular wall more than outer cylinder body (1) and inner barrel (2) bottom, and outer cylinder body (1) and inner barrel (2) bottom without
The corresponding central angle of arc length of hole portion position is 60-150 °.
9. the noise reduction of the centrifugal blower according to any claim in claim 1 to 8, oil-filtering apparatus, it is characterised in that：
Described outer cylinder body (1) and inner barrel (2) is tilted obliquely from front to back, and oil leaking hole is provided with the spiral case bottom of centrifugal blower
(8), it is provided with swab case (9) in the lower section of the oil leaking hole (8).
10. the noise reduction of centrifugal blower according to claim 9, oil-filtering apparatus, it is characterised in that：The swab case (9)
Front end forms to forward extend out connects oily tongue (91) in the outer cylinder body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510991010.0A CN105526197B (en) | 2015-12-24 | 2015-12-24 | A kind of noise reduction of centrifugal blower, oil-filtering apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510991010.0A CN105526197B (en) | 2015-12-24 | 2015-12-24 | A kind of noise reduction of centrifugal blower, oil-filtering apparatus |
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| Publication Number | Publication Date |
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| CN105526197A CN105526197A (en) | 2016-04-27 |
| CN105526197B true CN105526197B (en) | 2017-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510991010.0A Active CN105526197B (en) | 2015-12-24 | 2015-12-24 | A kind of noise reduction of centrifugal blower, oil-filtering apparatus |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640763B (en) * | 2016-10-20 | 2022-11-25 | 宁波方太厨具有限公司 | Air inlet ring and centrifugal fan adopting same |
| CN106881011A (en) * | 2017-01-18 | 2017-06-23 | 合肥杰通环境技术有限公司 | A kind of compound smoke hood type lampblack purifying system |
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| CN102518605A (en) * | 2005-02-23 | 2012-06-27 | 康明斯涡轮增压技术有限公司 | Compressor |
| CN101535656A (en) * | 2006-11-02 | 2009-09-16 | 松下电器产业株式会社 | Centrifugal fan |
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| CN105526197A (en) | 2016-04-27 |
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