CN201206569Y - Draught fan - Google Patents
Draught fan Download PDFInfo
- Publication number
- CN201206569Y CN201206569Y CNU2008200346565U CN200820034656U CN201206569Y CN 201206569 Y CN201206569 Y CN 201206569Y CN U2008200346565 U CNU2008200346565 U CN U2008200346565U CN 200820034656 U CN200820034656 U CN 200820034656U CN 201206569 Y CN201206569 Y CN 201206569Y
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- CN
- China
- Prior art keywords
- fan
- casing
- impeller
- fan casing
- induced draught
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- 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.)
- Expired - Lifetime
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Abstract
The utility model relates to an induced draft fan, which comprises a fan main body driven by a power device. The fan main body comprises a fan casing and impellers arranged in the fan casing and rotating around a horizontal axis driven by the power device, an air inlet tube arranged in the axial direction on one side of the blower casing, and an air outlet pipe arranged in a direction tangential with rotary track of the impeller external edge. The cross sectional shape of the fan chassis vertical to the axial direction is logistic spiral shaped. The rotary track of the impeller external edge is round. The farthermost distance between the round and the fan chassis is 0.7-1 times of radius of the round. The closet distance between the round and the fan chassis is 0.1-1.1cm. By adopting the induced draft fan, the distance between the fan casing and the impellers is increased, the friction between air and the metal casing is reduced, and the noise is reduced. The induced air flow rate of the fan is increased while increasing the volume of an air chamber, thereby improving efficiency and saving energy.
Description
Technical field
The utility model relates to a kind of induced draught fan, more particularly, relates to a kind of induced draught fan of centrifugal big discharge capacity
Background technique
Induced draught fan of the prior art, along with the increase of air inducing power, the noise pollution of its generation also constantly increases, even up to the 60-80 decibel.Even enough produce more powerful induced draught fan, but do not reach national environmental standard, it can't be come into operation yet as if control to noise pollution at mechanical structure acoustic energy.
The air that the noise of induced draught fan is mainly derived from high speed rotating collides vibration and the friction that is produced mutually with hardware in the induced draught fan, and unstable in rotation mechanical vibration take place also is the source of noise with friction to the machinery of high speed rotating simultaneously.
Therefore how to reduce the key that noise becomes the air inducing efficient that increases induced draught fan.
Summary of the invention
The purpose of this utility model is to provide a kind of induced draught fan of high-power, low noise.
Technical solution adopted in the utility model is:
A kind of induced draught fan, comprise the blower fan main body that drives by power equipment, the impeller that can be under the driving of described power equipment rotates around the axle of level that this blower fan main body comprises Fan casing and is positioned at this Fan casing, in a side of described Fan casing along the described air intake pipe that axially offers, on described Fan casing, along setting out airduct with the tangent direction of the outer peripheral rotary motion trace of described impeller, described Fan casing be logarithmic spiral shape with described axially perpendicular sectional shape, the outer peripheral rotary motion trace of described each impeller is circle, distance between this circle and the described Fan casing is at 0.7～1 times that at a distance of the farthest is described radius of a circle, and the distance between described circle and the described Fan casing is 0.1～1.1 centimetre at the most approaching place.
Described blower fan main body is 2 of measure-alike and symmetrical both sides that are arranged on described power equipment, and these 2 blower fan main bodys are driven by described power equipment simultaneously.Described air intake pipe is tubaeform along described axial setting.Described air intake pipe is 0.5～0.7 times of the diameter of the outer peripheral circular rotary motion trace of described impeller at the longitudinal section diameter at narrow place.Described power equipment comprises motor and drivign belt.
The utility model has increased the distance between Fan casing and the impeller, has promptly increased the wind cavity volume.Though this technological scheme makes that the blast of wind when being drawn descends, wind speed reduces, and also makes the friction between air and the metal shell reduce greatly simultaneously, promptly makes noise reduce greatly.
And because the wind cavity volume increases, make the air inducing flow of induced draught fan increase, just increased the efficient of induced draught fan.Because the air inducing resistance of this induced draught fan is little, flow is big, so can save the energy of consumption greatly.
The induced draught fan of implementing according to the utility model guaranteeing under the enough big prerequisite of air inducing power, with the prior art induced draught fan the noise of issuable 60-80 decibel be reduced to below 20 decibels, avoided industrial noise pollution, meet the requirement of environmental protection and energy saving simultaneously.
Description of drawings
Accompanying drawing 1 is a plan view of the present utility model;
Accompanying drawing 2 is that the A-A of accompanying drawing 1 is to sectional view;
Accompanying drawing 3 is that the B-B of accompanying drawing 2 is to sectional view.
Wherein: 1, power equipment; 11, motor; 12, drivign belt; 2, blower fan main body; 21, Fan casing; 22, impeller; 23, air intake pipe; 24, air outlet tube; 25, impeller base; 26, double end main shaft; L1, minimum range; L2, ultimate range; L3, air intake pipe diameter.
Embodiment
Below embodiment of the present utility model is described:
As shown in Figure 2, according to a kind of induced draught fan that the utility model is implemented, comprise a pair of blower fan main body 2 of the both sides that are symmetricly set on motor 11.Each blower fan main body 2 all comprises Fan casing 21 and is arranged on one group of impeller 22 in this Fan casing 21.Two groups of impellers 22 in this a pair of blower fan main body 2 are installed in the two ends of the double end main shaft 26 of level respectively, thereby can sway under the driving of motor 1 with linking.
As shown in Figure 1, described Fan casing 21 with described axially perpendicular sectional shape be logarithmic spiral shape.
As shown in Figures 1 and 2, in a side of Fan casing 21, with impeller 22 coaxial offer flaring air intake pipe 23.On the cylinder side wall of Fan casing 21, straight up set out airduct 24, the position of this air outlet tube 24 and impeller 22 outer peripheral rotary motion trace are tangent.
As shown in Figure 3, the outer peripheral rotary motion trace of impeller 22 is circle, and the minimum range L1 between the Fan casing 21 of this circle and logarithmic spiral shape is positioned at the top; Ultimate range L2 is positioned at the sidepiece that offers air outlet tube 24.In the present embodiment, described track diameter of a circle is 2 meters, and L1 is 0.5 centimetre, and L2 is 0.9 meter.Impeller 22 is connected by the end of impeller base 25 with double end main shaft 26.Air intake pipe 23 is 1.2 meters of the longitudinal section diameters at the narrowest place.
In the working procedure, motor 11 impeller 22 are rotated, and air from air intake pipe 23 suction, along in the accompanying drawing 3 shown in the direction of arrow, is sent from air outlet tube 24 after spiral motion in Fan casing 21.
In the utility model, ultimate range L2 is far longer than the ultimate range between the impeller and Fan casing in traditional induced draught fan, has promptly increased the wind cavity volume, makes that the friction between air and the metal shell reduces greatly, even noise reduces greatly.
Wind cavity volume increase simultaneously makes the air inducing flow also increase thereupon, has improved the efficient of induced draught fan greatly.
Be symmetrical arranged a pair of blower fan main body 2, make rotatingshaft when rotating, can keep balance, produce shake hardly, therefore also can play the effect that reduces noise.
As mentioned above, we are illustrated according to aim of the present utility model fully, but the utility model is not limited to the foregoing description and implementation methods.The practitioner of correlative technology field can carry out different variations and enforcement in the scope of technological thought permission of the present utility model.
Claims (5)
1, a kind of induced draught fan, comprise the blower fan main body (2) that drives by power equipment (1), this blower fan main body (2) comprises Fan casing (21) and is positioned at it is characterized in that around an impeller (22) that rotates of level under the driving of described power equipment (1) of this Fan casing (21):
In a side of described Fan casing (21) along the described air intake pipe (23) that axially offers,
On described Fan casing (21), along setting out airduct (24) with the tangent direction of the outer peripheral rotary motion trace of described impeller (22),
Described Fan casing (21) be logarithmic spiral shape with described axially perpendicular sectional shape,
The outer peripheral rotary motion trace of described each impeller (22) is circle, distance between this circle and the described Fan casing (21) is at 0.7～1 times that at a distance of the farthest is described radius of a circle, and the distance between described circle and the described Fan casing (21) is 0.1～1.1 centimetre at the most approaching place.
2, a kind of induced draught fan according to claim 1, it is characterized in that: described blower fan main body (2) is 2 of the measure-alike and symmetrical both sides that are arranged on described power equipment (1), and these 2 blower fan main bodys (2) are driven by described power equipment (1) simultaneously.
3, a kind of induced draught fan according to claim 1 is characterized in that: described air intake pipe (23) tubaeform for along described axial setting.
4, a kind of induced draught fan according to claim 3 is characterized in that: described air intake pipe (23) is 0.5～0.7 times of the diameter of the outer peripheral circular rotary motion trace of described impeller (22) at the longitudinal section diameter at narrow place.
5, a kind of induced draught fan according to claim 1 is characterized in that: described power equipment (1) comprises motor (11) and drivign belt (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200346565U CN201206569Y (en) | 2008-04-16 | 2008-04-16 | Draught fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200346565U CN201206569Y (en) | 2008-04-16 | 2008-04-16 | Draught fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201206569Y true CN201206569Y (en) | 2009-03-11 |
Family
ID=40465632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200346565U Expired - Lifetime CN201206569Y (en) | 2008-04-16 | 2008-04-16 | Draught fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201206569Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527520A (en) * | 2013-10-29 | 2014-01-22 | 中国北车集团大连机车研究所有限公司 | Centrifugal fan for cooling devices for high speed electric locomotives and motor train units |
| WO2020048203A1 (en) * | 2018-09-04 | 2020-03-12 | 宁波奥克斯电气股份有限公司 | Air channel assembly and air conditioner |
-
2008
- 2008-04-16 CN CNU2008200346565U patent/CN201206569Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527520A (en) * | 2013-10-29 | 2014-01-22 | 中国北车集团大连机车研究所有限公司 | Centrifugal fan for cooling devices for high speed electric locomotives and motor train units |
| WO2020048203A1 (en) * | 2018-09-04 | 2020-03-12 | 宁波奥克斯电气股份有限公司 | Air channel assembly and air conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: JIANGSU WANBAO COPPER GROUP CO.,LTD. Free format text: FORMER OWNER: NI RUBAO Effective date: 20100312 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 215234 WUJIANG WANBAO COPPER STRIP CO., LTD., SHUANGTA BRIDGE, QIDU TOWN, WUJIANG CITY, JIANGSU PROVINCE TO: 215234 SHUANGTA BRIDGE, QIDU TOWN, WUJIANG CITY, JIANGSU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20100312 Address after: 215234 Twin Towers bridge, seven towns, Wujiang, Jiangsu Patentee after: Jiangsu Wanbao Copper Group Co. Ltd. Address before: 215234 Jiangsu province Wujiang city seven town of Twin Towers bridge in Wujiang Wanbao copper foil Co. Ltd Patentee before: Ni Rubao |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090311 |