CN201818558U - Anti-surge subway blower fan - Google Patents
Anti-surge subway blower fan Download PDFInfo
- Publication number
- CN201818558U CN201818558U CN2010202916274U CN201020291627U CN201818558U CN 201818558 U CN201818558 U CN 201818558U CN 2010202916274 U CN2010202916274 U CN 2010202916274U CN 201020291627 U CN201020291627 U CN 201020291627U CN 201818558 U CN201818558 U CN 201818558U
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- surge
- ring
- blower fan
- impeller
- fixed
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Abstract
The utility model discloses an anti-surge subway blower fan which comprises a blower fan, an impeller and an air duct. The impeller is fixed on an output shaft of a motor; the impeller comprises a hub and a plurality of fan blades uniformly and fixedly distributed on the surface of the hub; the motor is fixed at the axis position inside the air duct through a bracket; an anti-surge ring is fixed on the air duct at one end close to the impeller; the anti-surge ring is provided with an outer ring and an inner ring which are concentric with each other; a plurality of small rings, parts of which are cut, are uniformly fixed between the outer ring and the inner ring; and the cut parts of the small rings are towards the center of the anti-surge ring. The surface of the hub adopts a partial spherical surface. The anti-surge subway blower fan has the advantages that on one hand, by adding the anti-surge ring, the pressure at a low discharge zone of the subway blower fan is improved, the performance curve of the blower fan is more smooth, and the blower fan can be prevented from producing surge; and on the other hand, the pressure of the blower fan at low discharge condition cam be improved through the spherical surface design, the hump part in the performance curve can be reduced, the load factor of the impeller can be reduced, and the blower fan can be effectively prevented from producing surge.
Description
Technical field
The utility model relates to a kind of underground fan of anti-surge.Be applicable to Environmental Control System of Metro, be mainly used in the air conditioner ventilation of platform and Fire disaster ventilation in emergency circumstances, belong to blower fan and ventilating engineering technical field.
Background technique
Underground fan is very important ventilation equipment in the Environmental Control System of Metro, and prevention underground fire hazard and the travelling comfort that improves subway inside are played crucial effects.Environmental Control System of Metro is because of being subjected to the restriction of installing space, and airduct is arranged relative complex, and institute of system fittings is more, causes system resistance bigger, and blower fan is subjected to the influence of vehicle piston wind sometimes, can cause the instantaneous increase of system resistance.The energy consumption of underground fan accounts for about 50% of Environmental Control System of Metro total energy consumption, and for the expense that reduces the underground fan operation with reach energy saving purposes, ring control control centre can carry out VFC to underground fan according to the different situations of weather conditions.Above a variety of causes all can make the performance parameter situation operation of underground fan at off-design point.The left-hand component of axial-flow blower performance curve is the small flow zone, is generally the hump zone, belongs to unstable region.The system of local iron winds machine increases suddenly because of certain reason resistance, and the pressure that blower fan produces causes air quantity to drop in the unstable region less than pipe resistance.Because of the existence in hump zone, at this moment force value of blower fan has two corresponding flow values, and air quantity moves between two points, causes blower fan generation surge.
The model utility content
For overcoming above-mentioned defective, the utility model aims to provide a kind ofly to be guaranteed can prevent surge under the situation that is being subjected to that train piston wind impacts or is increasing suddenly because of certain reason system resistance, underground fan that can also safe operation.
For achieving the above object, the technical solution adopted in the utility model is: a kind of underground fan of anti-surge, comprise motor, impeller and air duct, described impeller is fixed on the output shaft of motor, described impeller comprises that wheel hub and even distribution are fixed on several fan blades on the wheel hub surface, described motor is fixed on shaft core position in the air duct by support, the close impeller end of described air duct is fixed with anti-surge ring, described anti-surge ring has concentric outer ring and inner ring, evenly be fixed with the circular little ring that several clip part between described outer ring and the inner ring, the little ring of described circle clip part towards the center of circle of anti-surge ring.
The quantity of the little ring of described circle is 48-124.
Described wheel hub surface is the spherical calotte shape.
Adopted the underground fan of anti-surge of the present utility model, by adding anti-surge ring, improved the pressure in underground fan small flow zone on the one hand, made the performance curve of blower fan slick and sly more, thereby eliminated the hump part in the characteristic curve of fan, can avoid blower fan to produce surge.On the other hand, by the design of global wheel hub face, can improve the pressure of blower fan at low flow rate condition.Eliminating or reduce hump part in the performance curve, reduce the impeller loading factor as far as possible, also is one of measure of prevention blower fan surge.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of anti-surge ring;
Fig. 3 is the structural representation of impeller.
Among the figure: 1-motor, 2-impeller, 3-air duct, 4-support, 5-anti-surge ring, 6-wheel hub, 7-fan blade, 8-wheel hub surface, 9-outer ring, 10-inner ring, the circular little ring of 11-.
Embodiment
As shown in Figure 1-Figure 3, the utility model discloses a kind of underground fan of anti-surge, comprise motor 1, impeller 2 and air duct 3, described impeller 2 is fixed on the output shaft of motor 1, described impeller 2 comprises that wheel hub 6 and even distribution are fixed on several fan blades 7 on the wheel hub surface 8, described motor 1 is fixed on shaft core position in the air duct 3 by support 4, in sum, with existing subway blower fan basically identical, innovative point of the present utility model is that mainly close impeller 2 ends of described air duct 3 are fixed with anti-surge ring 5, described anti-surge ring 5 has concentric outer ring 9 and inner ring 10, evenly be fixed with the circular little ring 11 that several clip part between described outer ring 9 and the inner ring 10, the little ring 11 of described circle clip part towards the center of circle of anti-surge ring 5.When local iron winds fan delivery was reduced near the hump district, the air intake at fan blade 7 tops can produce vortex.When air quantity further reduced, the vortex region of fan blade 7 inlet sides continued to expand near the outer wall.At this moment, the circular little ring 11 on the anti-surge ring 5 can be eliminated the vortex of the outer wall of air intake on the one hand, makes air-flow enter prewhirling of impeller 2 preceding generation negative senses, the effect of stator before being equivalent on the other hand.Make the performance curve of blower fan slick and sly more, thereby eliminated the hump part in the characteristic curve of fan, can avoid blower fan to produce surge.
According to varying in size of impeller 2 diameters of underground fan, the quantity of the little ring 11 of described circle can be 48-124.Quantity as the circular little ring 11 of the underground fan of 2 meters of diameters is about 72.
Performance parameter when improving the blower fan low discharge to greatest extent.As shown in Figure 3, the wheel hub surface 8 of the underground fan of anti-surge of the present utility model is the spherical calotte shape.Be wheel hub 6 along portion's face of axis be a cydariform, the wheel hub surface 8 of this design can improve the pressure of blower fan at low flow rate condition.Eliminate or reduce hump part in the performance curve.Reduce impeller 2 loading factors as far as possible, can further avoid underground fan generation likelihood of turbocharger surge.
Claims (3)
1. the underground fan of an anti-surge, comprise motor (1), impeller (2) and air duct (3), described impeller (2) is fixed on the output shaft of motor (1), described impeller (2) comprises that wheel hub (6) and even distribution are fixed on several fan blades (7) on the wheel hub surface (8), described motor (1) is fixed on the interior shaft core position of air duct (3) by support (4), close impeller (2) end that it is characterized in that described air duct (3) is fixed with anti-surge ring (5), described anti-surge ring (5) has concentric outer ring (9) and inner ring (10), evenly be fixed with the circular little ring (11) that several clip part between described outer ring (9) and the inner ring (10), the little ring of described circle (11) clip part towards the center of circle of anti-surge ring (5).
2. the underground fan of anti-surge according to claim 1, the quantity that it is characterized in that the little ring of described circle (11) are 48-124.
3. the underground fan of anti-surge according to claim 1 is characterized in that described wheel hub surface (8) is the spherical calotte shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202916274U CN201818558U (en) | 2010-08-12 | 2010-08-12 | Anti-surge subway blower fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202916274U CN201818558U (en) | 2010-08-12 | 2010-08-12 | Anti-surge subway blower fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201818558U true CN201818558U (en) | 2011-05-04 |
Family
ID=43916515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202916274U Expired - Fee Related CN201818558U (en) | 2010-08-12 | 2010-08-12 | Anti-surge subway blower fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201818558U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104696289A (en) * | 2013-12-10 | 2015-06-10 | 惠阳航空螺旋桨有限责任公司 | Surging prevention structure of subway axial flow fan |
| CN106704243A (en) * | 2017-02-10 | 2017-05-24 | 浙江金盾风机股份有限公司 | Integral anti-surge device for spinning forming of subway axial flow fan |
| CN108425889A (en) * | 2018-04-09 | 2018-08-21 | 浙江理工大学上虞工业技术研究院有限公司 | The two level axial flow blower and its anti-asthma method of slight of efficient anti-surging |
-
2010
- 2010-08-12 CN CN2010202916274U patent/CN201818558U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104696289A (en) * | 2013-12-10 | 2015-06-10 | 惠阳航空螺旋桨有限责任公司 | Surging prevention structure of subway axial flow fan |
| CN106704243A (en) * | 2017-02-10 | 2017-05-24 | 浙江金盾风机股份有限公司 | Integral anti-surge device for spinning forming of subway axial flow fan |
| CN108425889A (en) * | 2018-04-09 | 2018-08-21 | 浙江理工大学上虞工业技术研究院有限公司 | The two level axial flow blower and its anti-asthma method of slight of efficient anti-surging |
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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: 20110504 Termination date: 20160812 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |