CN103047194B - A kind of low noise blower fan - Google Patents
A kind of low noise blower fan Download PDFInfo
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- CN103047194B CN103047194B CN201310022102.9A CN201310022102A CN103047194B CN 103047194 B CN103047194 B CN 103047194B CN 201310022102 A CN201310022102 A CN 201310022102A CN 103047194 B CN103047194 B CN 103047194B
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- intaker
- air
- inlet device
- blower fan
- air inlet
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Abstract
The object of the invention is to propose a kind of low noise blower fan.Low noise blower fan of the present invention is made up of casing, impeller, air-intaker, damper, transmission group, and described air-intaker is arranged between the entrance point of impeller and damper; Key is that described air-intaker is made up of external air inlet device and interior air-intaker, and the diameter of described external air inlet device is greater than the diameter of interior air-intaker, and external air inlet device is placed on the periphery of interior air-intaker.Low noise blower fan of the present invention improves damper, air-intaker, casing and impeller, reduces the use noise of complete blower, improves the utilization efficiency of blower fan, reach the object of energy-saving and environmental protection, have good practicability.
Description
Technical field
The invention belongs to fluid machinery class field, be related specifically to a kind of low noise blower fan.
Background technique
Blower fan is the one machinery of gas energy the energy conversion of prime mover, and be commonly used to the industries such as mine, chemical industry, cement, Environmental-protecting dust-removing, weaving, purposes is comparatively wide, and the domestic output value is comparatively large, and within 2011, state's inner blower output value reaches 73,000,000,000 yuan.The use amount of conventional fan is large, and power consumption is large, and noise pollution is serious, and therefore the blower fan of development environmental protection low noise, efficient energy-saving has become the most important thing of China's blower fan development.
Specifically, the typical structure of blower fan is that casing is built with impeller, casing entrance point is equipped with damper, air-intaker is had between impeller and damper, air-flow from damper is collected in impeller by air-intaker, by being expelled in casing at a high speed after impeller acting, in casing, discharge casing after diffusion.When air-flow imports in impeller by air-intaker, because the tapering of air-intaker is larger, the intake grill of air-intaker and the diameter of exhaust outlet change greatly, form larger horn shape, not only be exaggerated noise, excessive horn-like contraction is easier to also make the main MEDIA FLOW in imported air-flow and impeller channel produce turbulent flow, causes the decrease in efficiency of main MEDIA FLOW, and then reduces the efficiency of blower fan.
Summary of the invention
The object of the invention is to propose a kind of low noise blower fan.
Low noise blower fan of the present invention is made up of casing, impeller, air-intaker, damper, transmission group, and described air-intaker is arranged between the entrance point of impeller and damper; Key is that described air-intaker is made up of external air inlet device and interior air-intaker, and the diameter of described external air inlet device is greater than the diameter of interior air-intaker, and external air inlet device is placed on the periphery of interior air-intaker.
Above-mentioned low noise blower fan utilizes external air inlet device and interior air-intaker air intake, like this, air-intaker forms an air intake passage, an air intake passage is formed between external air inlet device and interior air-intaker, the contraction ratio of the air intake flow of two air intake passages and all single than the tradition air-intaker of the contraction ratio of air-out flow is little, therefore the loss of air-flow can be made to reduce, and under the rectified action of interior air-intaker, make turbulent flow reduce.The horn shape that simultaneously original single air-intaker is larger to the amplification of noise split by interior air-intaker after, noise reduction, and flow efficiency is improved.Particularly work at blower fan small flow, time air-flow can not be full of air-intaker, turbulent flow is larger, but in dual rectification and the raising of guide functions current downflow efficiency of inside and outside air-intaker, fan characteristic when improving small flow, make pressure now and efficiency also obtain raising, improve the characteristic curve of blower fan simultaneously.
Further, the angle between described interior air-intaker sidewall and interior air-intaker axis is less than the angle between described external air inlet device sidewall and external air inlet device axis.The air intake passage between inside and outside air-intaker can be made like this to be bell mouth shape, to promote rectification wind effect.
Further, described interior air-intaker is straight-tube shape or bell mouth shape, all like this can carry out arranging and wind-guiding by the air-flow internally in air-intaker.
Further, described damper, external air inlet device, interior air-intaker, the inwall of casing and the surface of impeller are all pasted with elastic rubber layer, and elastic rubber layer can play noise elimination effect, to reduce noise.
Low noise blower fan of the present invention improves damper, air-intaker, casing and impeller, reduces the use noise of complete blower, improves the utilization efficiency of blower fan, reach the object of energy-saving and environmental protection, have good practicability.
Accompanying drawing explanation
Fig. 1 is the structural representation of the low noise blower fan of embodiment 1.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, the effect and working principle etc. of the specific embodiment of the present invention as the mutual alignment between the shape of involved each component, structure, each several part and annexation, each several part are described in further detail.
Embodiment 1:
As shown in the figure, the low noise blower fan of the present embodiment is made up of casing 1, impeller 2, air-intaker, damper 3, transmission group 4, and described air-intaker is arranged between the entrance point of impeller 2 and damper 3; Key is that described air-intaker is made up of the external air inlet device 5 and interior air-intaker 6 being bell mouth shape, and the angle between interior air-intaker 6 sidewall and interior air-intaker 6 axis is less than the angle between described external air inlet device 5 sidewall and external air inlet device 5 axis; The diameter of described external air inlet device 5 is greater than the diameter of interior air-intaker 6, and external air inlet device 5 is placed on the periphery of interior air-intaker 6.
The inwall of damper 3, external air inlet device 5, interior air-intaker 6, casing 1 and the surface of impeller 2 are all pasted with elastic rubber layer, and elastic rubber layer can play noise elimination effect, to reduce noise.
Above-mentioned low noise blower fan utilizes external air inlet device 5 and interior air-intaker 6 air intake, like this, air-intaker 6 forms an air intake passage, an air intake passage is formed between external air inlet device 5 and interior air-intaker 6, two air intake passages are bell mouth shape, and the contraction ratio of all single than the tradition air-intaker of the contraction ratio of both air intake flows and air-out flow is little, therefore the loss of air-flow can be made to reduce, and under the rectified action of interior air-intaker 6, make turbulent flow reduce.The horn shape that simultaneously original single air-intaker is larger to the amplification of noise split by interior air-intaker 6 after, noise reduction, and flow efficiency is improved.Particularly work at blower fan small flow, time air-flow can not be full of air-intaker, turbulent flow is larger, but in dual rectification and the raising of guide functions current downflow efficiency of inside and outside air-intaker, fan characteristic when improving small flow, make pressure now and efficiency also obtain raising, improve the characteristic curve of blower fan simultaneously.
Claims (3)
1. a low noise blower fan, is made up of casing, impeller, air-intaker, damper, transmission group, and described air-intaker is arranged between the entrance point of impeller and damper; It is characterized in that described air-intaker is made up of external air inlet device and interior air-intaker, the diameter of described external air inlet device is greater than the diameter of interior air-intaker, and external air inlet device is placed on the periphery of interior air-intaker; Described interior air-intaker forms an air intake passage, forms an air intake passage between external air inlet device and interior air-intaker, and two air intake passages are the bell mouth shape shunk gradually along air intake direction; Angle between described interior air-intaker sidewall and interior air-intaker axis is less than the angle between described external air inlet device sidewall and external air inlet device axis.
2. low noise blower fan according to claim 1, is characterized in that described interior air-intaker is bell mouth shape.
3. low noise blower fan according to claim 1 and 2, is characterized in that described damper, external air inlet device, interior air-intaker, the inwall of casing and the surface of impeller are all pasted with elastic rubber layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310022102.9A CN103047194B (en) | 2013-01-22 | 2013-01-22 | A kind of low noise blower fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310022102.9A CN103047194B (en) | 2013-01-22 | 2013-01-22 | A kind of low noise blower fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103047194A CN103047194A (en) | 2013-04-17 |
| CN103047194B true CN103047194B (en) | 2016-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310022102.9A Active CN103047194B (en) | 2013-01-22 | 2013-01-22 | A kind of low noise blower fan |
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| CN (1) | CN103047194B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889090B (en) * | 2016-04-14 | 2018-09-28 | 嘉兴晟源工业设计有限公司 | A kind of adjustable grate-cooler of exhaust air rate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202031885U (en) * | 2011-04-27 | 2011-11-09 | 张益民 | Improved energy-saving centrifugal fan |
| CN102852862A (en) * | 2012-10-09 | 2013-01-02 | 宁波风机有限公司 | Air inlet flow guide device for small centrifugal fan |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4775295A (en) * | 1985-05-17 | 1988-10-04 | Klein, Schanzlin & Becker Aktiengesellschaft | Centrifugal pump casing |
| CA2123640A1 (en) * | 1993-05-17 | 1994-11-18 | Thomas A. Berger | Airflow measuring centrifugal fan |
| CN102287385A (en) * | 2011-09-04 | 2011-12-21 | 余旦 | Centrifugal blower fan |
| CN203051241U (en) * | 2013-01-22 | 2013-07-10 | 安徽安风风机有限公司 | High-efficient low-noise draught fan |
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2013
- 2013-01-22 CN CN201310022102.9A patent/CN103047194B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202031885U (en) * | 2011-04-27 | 2011-11-09 | 张益民 | Improved energy-saving centrifugal fan |
| CN102852862A (en) * | 2012-10-09 | 2013-01-02 | 宁波风机有限公司 | Air inlet flow guide device for small centrifugal fan |
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| CN103047194A (en) | 2013-04-17 |
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