CN203730413U - Low-noise axial flow fan - Google Patents
Low-noise axial flow fan Download PDFInfo
- Publication number
- CN203730413U CN203730413U CN201420046535.8U CN201420046535U CN203730413U CN 203730413 U CN203730413 U CN 203730413U CN 201420046535 U CN201420046535 U CN 201420046535U CN 203730413 U CN203730413 U CN 203730413U
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- China
- Prior art keywords
- casing
- motor
- blade
- noise axial
- case
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- Expired - Fee Related
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Abstract
The utility model relates to a ventilating device, in particular to a low-noise axial flow fan for indoor ventilation. The low-noise axial flow fan comprises a cylindrical case with both ends open. A motor is arranged in the case, a support is arranged between the motor and the inner wall of the case, the motor is fixedly connected with the case through the support, and therefore an output shaft of the motor and the axis of the case are located in the same straight line. Vanes are evenly distributed on the output shaft of the motor. A mesh cover is arranged at the open end, corresponding to the windward side of the vanes, of the case. A louver is arranged at the open end, corresponding to the leeward side of the vanes, of the case. The low-noise axial flow fan is characterized in that the space between the outer ends of the vanes and the inner wall of the case is smaller than or equal to 10 mm. According to the low-noise axial flow fan, the noise reduction effect can be achieved without lowering the power of the motor or arranging a sound insulation device; the low-noise axial flow fan is wide in application range and low in manufacturing cost.
Description
Technical field
The utility model relates to a kind of ventilation equipment, the low noise axial fan for room ventilation specifically, can be used for noise to have ventilation or the reinforcement heat radiation in the place such as industrial and mining enterprise, civil building of requirement, be particularly useful for the places such as SF6 switch gear room, transformer vault, capacitor chamber, warehouse, basement.
Background technique
According to analysis and research, the noise of axial-flow blower is mainly that to act on by blade the pulsating force that flows through the air-flow of blower fan and produce caused, and the air-flow of process is larger, noise is also larger, and in blower fan, the power of motor is to be directly proportional to the air-flow size that flows through blower fan.Therefore, the noise reduction measure generally adopting in industry is all power of motor by reducing blower fan, reduces air mass flow and realize, and will affect like this practical effect of blower fan, and its Applicable scope is affected.Also have that a kind of to use general noise reduction measure be exactly the acoustic isolation facility special in blower fan outer installment, can increase like this manufacture cost of blower fan.
Claimant studies discovery, and the blade of blower fan and the size of casing have a great impact to noise is same.The blade of the blower fan using in industry and casing cylinder mostly size are fixing, blades installation edge is controlled at 30 ~ 40mm mostly far from the radial dimension of cylinder inner wall, like this, in the time that air-flow contacts with fan blade, can there is break-in and produce noise with the casing collision of blower fan, air-flow after collision is annular turbulent flow area at blade rear Formation cross-section after casing inner wall bounce-back, and the radial width of annular turbulent flow area is larger, forms the noise disturbing and produce also just larger between the flow-disturbing in it and main air flow.
Model utility content
Problem to be solved in the utility model is to provide a kind of low noise axial fan, and this axial-flow blower does not need to reduce power of motor, also does not need to arrange acoustic isolation facility, just can realize the effect of noise reduction, and applied widely, manufacture cost is lower.
For addressing the above problem, take following scheme:
Low noise axial fan of the present utility model comprises casing, and this casing is the equal opening of cylindrical shape and two ends.In described casing, have motor, between motor and casing inner wall, have support, motor is and is fixedly connected with casing by support, makes the output shaft of motor and the axis of casing on same straight line.On the output shaft of described motor, be evenly equipped with blade, on casing opening end corresponding to blade windward side, have guard, on leeward corresponding casing opening end of blade, have venetian blind.Be characterized in that the spacing between outer end and the casing inner wall of described blade is less than or equal to 10mm.
Further improvement of the utility model scheme is that described support is long strip, and quantity is multiple, and they are circumferentially evenly arranged along casing inner wall, and the longitudinal middle part of support has convex tendon.The two ends of described support are all 90 degree bendings, and two bendings are and are fixedly connected with respectively with between casing inner wall, motor housing.
Further improvement of the utility model scheme is that manger board is arranged at the bottom in described casing, and the axis of this manger board and casing is perpendicular.There is weep hole at the lower edge place of described venetian blind.
Further improvement project of the present utility model is that described venetian blind comprises window frame, in window frame, be evenly equipped with horizontal louvre blade from top to bottom, the two ends of louvre blade all coordinate by being movable between bearing pin and window frame near the position on top, the top of the same corresponding end of louvre blade is all connected on a vertical connecting rod of arranging by bearing pin, make all louvre blades synchronously to open or to close, and in off position, louvre blade can cover window frame inner side completely.
Take such scheme, have the following advantages:
Because low noise axial fan of the present utility model narrows down to the spacing between the outer end of blade and casing inner wall in 10mm, farthest reduce the distance of blade and casing inner wall, the reducing of this distance reduces the move distance of air-flow after blade break-in, and because blade has acceleration to air-flow, be that the motion of air-flow after blade break-in is accelerated motion, the speed when distance of this accelerated motion reduces just to mean air-flow and casing inner wall collision can obviously reduce, thereby can greatly reduce the noise of air-flow and casing inner wall collision generation.In addition, the radial width that reduces also can reduce blade rear annular turbulent flow area of move distance after air-flow break-in, thus can reduce phase mutual interference between flow-disturbing and main air flow and the noise that produces.This low noise axial fan is the effect that realizes noise reduction by the mode of change structure size, does not need to reduce power of motor and air-flow size, can not exert an influence to power of motor, and applicable to any occasion, using scope is wider.And the change of this physical dimension, is only that the relative size of blade is increased, compared with special acoustic isolation facility is set, manufacture cost is relatively low.
Longitudinal middle part at support arranges convex tendon, can greatly increase the longitudinal rigid of support, makes it be difficult for longitudinal bending or distortion occurs, and can reduce the resonance of motor in the time of operation, further reduces the operation noise of this blower fan.
Manger board is set in casing, and in venetian blind one side, weep hole is set, can prevent stormy weather time, rainwater pours in down a chimney, motor and blade in protection blower fan, the working life of prolongation blower fan.
Venetian blind adopts the design of movable interlock louvre blade, can make blower fan in when operation, and air-flow promotes louvre blade and opens, and blower fan is in the time working, and louvre blade can be completely closed by the outer end of blower fan, thereby avoid outdoor environment on indoor impact.
Brief description of the drawings
Fig. 1 is the structural representation of low noise axial fan of the present utility model;
Fig. 2 be in Fig. 1 A-A to sectional view;
Fig. 3 is the left view of Fig. 1;
Fig. 4 is the right elevation of Fig. 1;
Fig. 5 is the enlarged diagram of Fig. 1 medium-height trestle;
Fig. 6 is the worm's eye view of Fig. 5;
Fig. 7 be in Fig. 6 B-B to sectional view.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further details.
As shown in Figures 1 to 4, low noise axial fan of the present utility model comprises casing 2, and this casing 2 is the equal opening of cylindrical shape and two ends, on two opening ends, is provided with square frame 1.In described casing 2, have motor 8, between motor 8 and casing 2 inwalls, be evenly equipped with support 9, motor 8 is and is fixedly connected with casing 2 by these supports 9, makes the output shaft of motor 8 and the axis of casing 2 on same straight line.On the output shaft of described motor 8, be evenly equipped with blade 7, the spacing between the outer end of blade 7 and casing 2 inwalls is less than or equal to 10mm.In the frame 1 of casing 2 opening ends corresponding to blade 7 windward sides, be provided with guard 10, in the frame 1 of casing 2 opening ends that blade 7 lee faces are corresponding, be provided with venetian blind.Described venetian blind comprises window frame 6, between window frame 6 and the frame 1 corresponding with it, be and be fixedly connected with, in window frame 6, be evenly equipped with horizontal louvre blade 4 from top to bottom, the two ends of louvre blade 4 all coordinate by being movable between bearing pin and window frame 6 near the position on top, the top of the same corresponding end of louvre blade 4 is all connected on a vertical connecting rod 5 of arranging by bearing pin, make all louvre blades 4 synchronously to open or to close, and in off position, louvre blade 4 can cover window frame 6 inner sides completely.In the present embodiment, the bottom in described casing 2 is also provided with manger board 3, and this manger board 3 is perpendicular with the axis of casing 2, and the window frame 6 lower edge places of venetian blind have weep hole 11, and the rainwater being blocked by manger board 3 can be discharged along this weep hole 11.
As shown in Figures 5 to 7, the support 9 in the present embodiment is all similar to long strip, and its global shape is right-angled trapezium, and the longitudinal middle part of support 9 is all processed with convex tendon 12.The two ends of described support 9 are all 90 degree bendings, and two bendings are and are fixedly connected with respectively with between casing 2 inwalls, motor 8 shells.
Claims (4)
1. a low noise axial fan, comprises casing (2), and this casing (2) is the equal opening of cylindrical shape and two ends; In described casing (2), there is motor (8), between motor (8) and casing (2) inwall, there is support (9), motor (8) is and is fixedly connected with casing (2) by support (9), makes the output shaft of motor (8) and the axis of casing (2) on same straight line; On the output shaft of described motor (8), be evenly equipped with blade (7), on casing (2) opening end corresponding to blade (7) windward side, have guard (10), on casing (2) opening end corresponding to blade (7) lee face, have venetian blind; It is characterized in that the spacing between outer end and casing (2) inwall of described blade (7) is less than or equal to 10mm.
2. low noise axial fan as claimed in claim 1, is characterized in that described support (9) is long strip, and quantity is multiple, and they are circumferentially evenly arranged along casing (2) inwall, and the longitudinal middle part of support (9) all has convex tendon (12); The two ends of described support (9) are all 90 degree bendings, and two bendings are and are fixedly connected with respectively with between casing (2) inwall, motor (8) shell.
3. low noise axial fan as claimed in claim 1, is characterized in that manger board (3) is arranged at the bottom in described casing (2), and this manger board (3) is perpendicular with the axis of casing (2); There is weep hole (11) at the lower edge place of described venetian blind.
4. low noise axial fan as claimed any one in claims 1 to 3, it is characterized in that described venetian blind comprises window frame (6), in window frame (6), be evenly equipped with horizontal louvre blade (4) from top to bottom, the two ends of louvre blade (4) all coordinate by being movable between bearing pin and window frame (6) near the position on top, the top of the same corresponding end of louvre blade (4) is all connected on a vertical connecting rod (5) of arranging by bearing pin, make all louvre blades (4) synchronously to open or to close, and in off position, louvre blade (4) can cover window frame (6) inner side completely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420046535.8U CN203730413U (en) | 2014-01-25 | 2014-01-25 | Low-noise axial flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420046535.8U CN203730413U (en) | 2014-01-25 | 2014-01-25 | Low-noise axial flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203730413U true CN203730413U (en) | 2014-07-23 |
Family
ID=51200491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420046535.8U Expired - Fee Related CN203730413U (en) | 2014-01-25 | 2014-01-25 | Low-noise axial flow fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203730413U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758795A (en) * | 2014-01-25 | 2014-04-30 | 无锡佳谊林电气有限公司 | Low-noise axial flow fan |
| CN108308777A (en) * | 2018-04-20 | 2018-07-24 | 智均安（苏州）科技有限公司 | Control temperature intelligent safety cap |
-
2014
- 2014-01-25 CN CN201420046535.8U patent/CN203730413U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758795A (en) * | 2014-01-25 | 2014-04-30 | 无锡佳谊林电气有限公司 | Low-noise axial flow fan |
| CN108308777A (en) * | 2018-04-20 | 2018-07-24 | 智均安（苏州）科技有限公司 | Control temperature intelligent safety cap |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140723 Termination date: 20210125 |