CN202732487U - Bidirectional reversed jet fan - Google Patents
Bidirectional reversed jet fan Download PDFInfo
- Publication number
- CN202732487U CN202732487U CN 201220274064 CN201220274064U CN202732487U CN 202732487 U CN202732487 U CN 202732487U CN 201220274064 CN201220274064 CN 201220274064 CN 201220274064 U CN201220274064 U CN 201220274064U CN 202732487 U CN202732487 U CN 202732487U
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- tunnel
- bidirectional
- wind
- cone
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Abstract
The utility model discloses a bidirectional reversed jet fan. The bidirectional reversed jet fan comprises a wind cone, a motor and an impeller which is connected with an output shaft of the motor; two ends of the wind cone are respectively provided with a wind guide cone; each wind guide cone and the wind cone are formed into a horizontally downward angle alpha, wherein alpha is equal to 12-15 degrees; and a noise reduction layer is arranged on the periphery of the wind guide cones. By adopting the bidirectional reversed jet fan provided by the utility model, as two wind guide cones which are horizontally downward in angle are arranged at two ends of the wind cone, the high speed airflow blown out by the jet fan is blown to a tunnel in a horizontally downward way after being guided by the wind guide cones, in such a way, the friction between the airflow and the top wall of the tunnel is avoided, and in the other hand, most of the airflow is blown to the lower half part of the tunnel, therefore, the ventilation effect of the tunnel is greatly improved, and meanwhile, the noise of the fan is reduced.
Description
Technical field
The utility model relates to a kind of ventilation equipment, relates to specifically a kind of bidirectional reversible jet-type propeller fan that is installed on the subway tunnel top.
Background technique
In the subway tunnel, for waste gas such as the carbon dioxide in the discharge tunnel, sulfur dioxide, introduce outside fresh air, usually all needing to install successively some discharge flow fans on the roof in tunnel ventilates, simultaneously, for realizing two-way ventilation, jet blower adopts the form of bidirectional reversible usually.We know that air is being disperse state through the air-flow after going out from exhaust outlet after the pressurization of draught fan impeller, and jet blower is because being installed in the position near the tunnel roof, inevitably understand the roof that some blows to the tunnel from the high velocity air that exhaust outlet flows out, flow velocity reduced rapidly after friction occured for this part high velocity air and tunnel roof, thereby aggravated the wind speed loss of jet blower, simultaneously, carbon dioxide in the tunnel, the common signal of the waste gas such as sulfur dioxide is in the bottom in tunnel, and the wind major part that jet blower blows out concentrates on the first half in tunnel, causes the effect of ventilation relatively poor.Can produce larger noise when in addition, the air-flow of high speed and tunnel roof rub.
The model utility content
For overcoming defects, the utility model aims to provide a kind of jet blower that can improve to greatest extent to ventilation effect in the tunnel, has again more low noise bidirectional reversible jet blower simultaneously.
For achieving the above object, the technical solution adopted in the utility model is: a kind of bidirectional reversible jet blower, comprise air duct, a motor and be connected to impeller on the motor output shaft, two ends of described air duct are respectively equipped with an air conducting tube, described air conducting tube and air duct be one with the downward angle a of level, a=12-15 degree.
The periphery of described air conducting tube is provided with the noise reduction layer.
Adopted bidirectional reversible jet blower of the present utility model, owing to two ends at air duct are provided with angle be and level two air conducting tubes down, be the downward angle of level after the guiding of the high velocity air that jet blower blows out by air conducting tube and blow to the tunnel, avoided on the one hand the friction of air-flow and tunnel roof, make on the other hand most of air-flow blow to the lower half portion in tunnel, improve greatly the ventilation effect in tunnel, simultaneously, also reduced the noise of blower fan.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Among the figure: 1-air duct, 2-motor, 3-impeller, 4-air conducting tube, 5-noise reduction layer, 6-tunnel roof.
Embodiment
As shown in Figure 1, the utility model discloses a kind of bidirectional reversible jet blower, comprise an air duct 1, motor 2 and be connected to impeller 3 on motor 2 output shafts, by motor 2 clockwise and anticlockwise, blow out high pressure draught after drives impeller 3 rotations are pressurizeed to air from air duct 1, the bidirectional reversible jet blower is installed on the tunnel roof 6 usually.In sum, basically identical with the structural type of existing common bidirectional reversible jet blower.
The innovative point of bidirectional reversible jet blower of the present utility model is that mainly two ends of described air duct 1 are respectively equipped with an air conducting tube 4, described air conducting tube 4 and air duct 1 be one with the downward angle a of level, be the axis of the axis of air conducting tube 4 and air duct 1 have one with the downward angle a of level, a=12-15 degree.No matter be forward or counter-rotating, the high pressure draught that blows out from air duct 1 at first enters air conducting tube 4, since air conducting tube 4 have one with the downward angle a of level, high pressure draught is one and advances with the downward angle a of level after blowing out air conducting tube 4, make most of air-flow all blow to the bottom in tunnel, be both and avoided the friction of air-flow and tunnel roof 6.Usually angle a can be between the 12-15 degree and selects, if the angle Selection of a is larger, although it is larger that air-flow flows out air conducting tube 4 angle under backward, makes more air-flow blow to the bottom in tunnel, larger angle variation can cause the obstruction of air duct 1 interior air-flow, cause fan efficiency to descend, otherwise, if the angle Selection of a is less, although the obstruction of air duct 1 interior air-flow is less, the efficient of blower fan is larger, but it is less to flow out the rear air-flow that flows to tunnel bottom of air conducting tube 4.For this reason, usually select the a=13 degree.
In order to make bidirectional reversible jet blower of the present utility model have lower noise, the periphery of described air conducting tube 4 is provided with noise reduction layer 5, makes air conducting tube 4 have simultaneously the function of hush pipe.
Claims (2)
1. bidirectional reversible jet blower, comprise an air duct (1), motor (2) and be connected to impeller (3) on motor (2) output shaft, two ends that it is characterized in that described air duct (1) are respectively equipped with an air conducting tube (4), described air conducting tube (4) and air duct (1) be one with the downward angle a of level, a=12-15 degree.
2. bidirectional reversible jet blower according to claim 1 is characterized in that the periphery of described air conducting tube (4) is provided with noise reduction layer (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220274064 CN202732487U (en) | 2012-06-12 | 2012-06-12 | Bidirectional reversed jet fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220274064 CN202732487U (en) | 2012-06-12 | 2012-06-12 | Bidirectional reversed jet fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202732487U true CN202732487U (en) | 2013-02-13 |
Family
ID=47658190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220274064 Expired - Lifetime CN202732487U (en) | 2012-06-12 | 2012-06-12 | Bidirectional reversed jet fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202732487U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564842A (en) * | 2015-01-29 | 2015-04-29 | 苏莫明 | Guide device of bidirectional reversible axial-flow fan |
| CN103307044B (en) * | 2013-07-08 | 2016-03-30 | 江苏华群科技发展有限公司 | Vector jet blower |
-
2012
- 2012-06-12 CN CN 201220274064 patent/CN202732487U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307044B (en) * | 2013-07-08 | 2016-03-30 | 江苏华群科技发展有限公司 | Vector jet blower |
| CN104564842A (en) * | 2015-01-29 | 2015-04-29 | 苏莫明 | Guide device of bidirectional reversible axial-flow fan |
| CN104564842B (en) * | 2015-01-29 | 2017-01-18 | 苏莫明 | Guide device of bidirectional reversible axial-flow fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130213 |