CN203702660U - Flow guide and noise reduction centrifugal fan - Google Patents
Flow guide and noise reduction centrifugal fan Download PDFInfo
- Publication number
- CN203702660U CN203702660U CN201320779428.1U CN201320779428U CN203702660U CN 203702660 U CN203702660 U CN 203702660U CN 201320779428 U CN201320779428 U CN 201320779428U CN 203702660 U CN203702660 U CN 203702660U
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- CN
- China
- Prior art keywords
- external box
- casing
- enclosure
- microvave
- box body
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Abstract
The utility model relates to the field of ventilating equipment, in particular to a flow guide and noise reduction centrifugal fan which comprises an enclosure, an impeller, a motor, a flow guide cover, shock absorption foundations and an external box body, wherein the exterior of the enclosure is covered with the external box body; a cross section of the enclosure is in a volute shape; the impeller is arranged in the enclosure; a horn-shaped air inlet and an air outlet are formed in the two side faces of the enclosure; one end, with a small diameter, of each of the horn-shaped air inlet and the air outlet faces towards the interior of the enclosure; air inlets and air outlets are formed in the two side faces, opposite to the air inflow and outflow ports of the enclosure, of the external box body; the flow guide cover is arranged at the air inlet of the enclosure and fixed on an internal wall of the external box body; the gap between the external box body and the enclosure is filled with filler for shock absorption and noise reduction; the motor is arranged at the top of the external box body; the motor is connected with a belt wheel at one end of a spindle via a belt; the other end of the spindle is connected with the impeller in the enclosure; and the shock absorption foundations are arranged at the bottom of the external box body. The noise and shock generated during operation of the fan can be well reduced, harm to a worker is relieved, and the service life of the fan is prolonged at the same time.
Description
Technical field
The utility model relates to ventilation equipment field, is specifically related to a kind of water conservancy diversion noise-lowering centrifugal blower fan.
Background technique
The impeller of centrifugal blower axially has multiple blades along main shaft, and carry out rotor blade by drive motor, thereby air amount radially deaeration vertically, in the time of work, can produce noise and vibration, noise can have a strong impact on staff's physical and mental health, and vibration can make shorten the working life of blower fan.
Model utility content
Technical problem to be solved in the utility model is to overcome the defect that above-mentioned prior art exists, and a kind of water conservancy diversion noise-lowering centrifugal blower fan can slowing down vibration abating the noise is provided.
The utility model adopts following technological scheme: a kind of water conservancy diversion noise-lowering centrifugal blower fan, comprise casing, impeller, motor, air guide sleeve, damping lower margin and external box of microvave, described casing outer cup has described external box of microvave, casing cross section is volute type, described impeller is arranged in casing, casing bi-side are provided with trumpet-shaped inlets and putlets of ventilation, the little one end of horn-like inlets and putlets of ventilation bore is all towards casing inside, external box of microvave bi-side relative to casing inlets and putlets of ventilation are equipped with inlets and putlets of ventilation, described air guide sleeve is arranged on the intake grill place of casing and is fixed on the inwall of external box of microvave, between described external box of microvave and casing, be filled with the packing of damping noise reduction, external box of microvave top is provided with motor, motor is connected with the belt wheel of main shaft one end by belt, the main shaft the other end connects the impeller of casing inside, described damping lower margin is arranged on the bottom of external box of microvave.
Described air guide sleeve is divided into outer cover and Inner cover, the air intake passage that outer cover and Inner cover composition cross section are zig-zag type, uniform noise reduction small through hole on Inner cover.
On described motor output shaft, belt pulley is housed.
Described belt is provided with belt hood outward.
The packing of filling damping noise reduction between described external box of microvave and casing is super glass wool and expanded polyethylene foam.
The beneficial effects of the utility model are: adopt such scheme, can well reduce noise, slowing down vibration, the Inner cover of air guide sleeve and outer cover are combined into the horn-like intake grill that cross section is the air intake passage cooperation casing of zig-zag type, can make Air Flow have certain directivity to eliminate turbulent flow, and sound wave is transferred in the time propagating, make acoustic wave energy consume, small through hole uniform on Inner cover has increased again the obstruction to Acoustic Wave Propagation, acoustic wave energy is decayed in the air again, reach noise reduction object, packing between external box of microvave and casing not only has good absorption to noise simultaneously, and can also absorbing vibration, coordinate the shockproof lower margin of bottom half to slow down greatly the vibrations that produce in blower fan work, protection blower fan also extends working life of blower fan.
Accompanying drawing explanation
Fig. 1 is Facad structure schematic diagram of the present utility model;
Fig. 2 is side structure schematic diagram of the present utility model;
Fig. 3 is the schematic cross-section of air guide sleeve 10 in Fig. 2.
In figure: 1 is external box of microvave, 2 is motor, and 3 is belt wheel, and 4 is protective housing, and 5 is belt, and 6 is impeller, 7 is shockproof lower margin, and 8 is casing, and 9 is main shaft, and 10 is air guide sleeve, and 10a is outer cover, 10b is inner cover, and 11 is small through hole, and 12 is packing, and 13 is intake grill, and 14 is exhaust outlet.
Embodiment
As shown in the figure, the utility model comprises casing 8, impeller 6, motor 2, air guide sleeve 10, damping lower margin 7 and external box of microvave 1, casing 8 outsides are covered with external box of microvave 1, casing 8 cross sections are volute type, impeller 6 is arranged in casing 8, casing 8 bi-side are provided with trumpet-shaped inlets and putlets of ventilation, the little one end of horn-like inlets and putlets of ventilation bore is all towards casing 8 inside, external box of microvave 1 is equipped with inlets and putlets of ventilation with the casing 8 relative bi-side of inlets and putlets of ventilation, air guide sleeve 10 is arranged on the intake grill place of casing 8 and is fixed on the inwall of external box of microvave 1, external box of microvave 1 and casing 8 between be filled with the packing 12 of damping noise reduction, external box of microvave 1 top is provided with motor 2, motor 2 is connected with the belt wheel of main shaft 9 one end by belt 5, main shaft 9 the other ends connect the impeller 6 of casing 8 inside, damping lower margin 7 is arranged on the bottom of external box of microvave 1.Motor 2 drives main shaft 9 to rotate by belt wheel 4 and belt 5, be arranged on the impeller 6 being connected with main shaft 9 in casing 8 rotates simultaneously, fan shaft is to being discharged from exhaust outlet 14 radially by intake grill 13 air amounts again, intake grill is provided with air guide sleeve 10, it is that the passage of zig-zag type makes air in the time entering blower fan, have directivity to reduce turbulent flow that the inner cover 10a of air guide sleeve 10 and outer cover 10b are combined into cross section, the noise of avoiding turbulent flow to bring, the turnover of process passage when the inner noise producing of blower fan is outwards propagated simultaneously, loss Acoustic Wave Propagation energy, to sound, wave propagation plays inhibition to small through hole 11 on Inner cover 10a simultaneously, packing 12 between external box of microvave 1 and casing 8 can well absorb Noise and vibration, reduce greatly the noise that blower fan produces in the time of work, reduce the harm of noise to staff, thereby the damping lower margin 7 of external box of microvave 1 bottom can provide the vibration protection blower fan that good buffer function has been eliminated blower fan greatly to extend its working life.
The utility model is not limited to described embodiment; those skilled in the art is not departing from spirit of the present utility model openly in scope; still can do some corrections or change, therefore the scope that rights protection scope of the present utility model limits with claims is as the criterion.
Claims (5)
1. water conservancy diversion noise-lowering centrifugal blower fan, comprise casing, impeller, motor, air guide sleeve, damping lower margin and external box of microvave, it is characterized in that: described casing outer cup has described external box of microvave, casing cross section is volute type, described impeller is arranged in casing, casing bi-side are provided with trumpet-shaped inlets and putlets of ventilation, the little one end of horn-like inlets and putlets of ventilation bore is all towards casing inside, the bi-side that external box of microvave is relative with casing inlets and putlets of ventilation are provided with inlets and putlets of ventilation, described air guide sleeve is arranged on the intake grill place of casing and is fixed on the inwall of external box of microvave, between described external box of microvave and casing, be filled with the packing of damping noise reduction, external box of microvave top is provided with motor, motor is connected with the belt wheel of main shaft one end by belt, the main shaft the other end connects the impeller of casing inside, described damping lower margin is arranged on the bottom of external box of microvave.
2. water conservancy diversion noise-lowering centrifugal blower fan according to claim 1, is characterized in that: described air guide sleeve is divided into outer cover and Inner cover, and the air intake passage that outer cover and Inner cover composition cross section are zig-zag type, is evenly equipped with noise reduction small through hole on Inner cover.
3. water conservancy diversion noise-lowering centrifugal blower fan according to claim 1, is characterized in that: on described motor output shaft, belt pulley is housed.
4. water conservancy diversion noise-lowering centrifugal blower fan according to claim 1, is characterized in that: described belt is provided with belt hood outward.
5. water conservancy diversion noise-lowering centrifugal blower fan according to claim 1, is characterized in that: the packing of filling damping noise reduction between described external box of microvave and casing is super glass wool and expanded polyethylene foam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320779428.1U CN203702660U (en) | 2013-11-29 | 2013-11-29 | Flow guide and noise reduction centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320779428.1U CN203702660U (en) | 2013-11-29 | 2013-11-29 | Flow guide and noise reduction centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203702660U true CN203702660U (en) | 2014-07-09 |
Family
ID=51053111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320779428.1U Expired - Fee Related CN203702660U (en) | 2013-11-29 | 2013-11-29 | Flow guide and noise reduction centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203702660U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613012A (en) * | 2015-01-13 | 2015-05-13 | 浙江聚英风机工业有限公司 | Explosion-proof type blower box |
-
2013
- 2013-11-29 CN CN201320779428.1U patent/CN203702660U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613012A (en) * | 2015-01-13 | 2015-05-13 | 浙江聚英风机工业有限公司 | Explosion-proof type blower box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20181129 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |