CN205064390U - Axial fan surge preventing device for subway tunnel - Google Patents
Axial fan surge preventing device for subway tunnel Download PDFInfo
- Publication number
- CN205064390U CN205064390U CN201520289803.3U CN201520289803U CN205064390U CN 205064390 U CN205064390 U CN 205064390U CN 201520289803 U CN201520289803 U CN 201520289803U CN 205064390 U CN205064390 U CN 205064390U
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- China
- Prior art keywords
- surge
- impeller
- axial
- blade
- ring
- Prior art date
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- Expired - Fee Related
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- 238000009434 installation Methods 0.000 claims description 16
- 230000002441 reversible effect Effects 0.000 claims description 5
- 238000009423 ventilation Methods 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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Abstract
The utility model discloses an axial fan surge preventing device for subway tunnel establishes in one side of impeller (4) at least, including ring shell (2), reposition of redundant personnel inner circle (1) and guide blade (3) of surging, wherein: surge ring degree of depth H for 0.2 -0.3 of impeller blade (4) height doubly, impeller (4) blade top axial distance L of stretching to the ring of surging for the long 0.3 -0.5 of leaf top chord times. The utility model discloses specially adapted diameter of impeller 1000mm -4000mm's tunnel fan for the subway, the phenomenon that can effectively prevent to surge takes place.
Description
Technical field
The utility model relates to a kind of subway tunnel axial-flow blower anti-surge installation, belongs to blower fan and performance of ventilation systems optimisation technique field.
Background technique
Existing axial-flow blower, because of ventilation pipe network and silencing apparatus blocking, or subway train reverse driving windward, or the situation such as the blower fan separate unit operation be installed in parallel and cause moment resistance excessive, when air quantity drops to a certain degree, air-flow stall, separation, blocking, surge will be there is, cause blower fan and system high vibration, even damage blower fan, destroy the normal operation of system.
Because general axial-flow blower is when departing from operating point and entering surge area work, blade tip stall, produces airflow breakaway, causes blocking also pressure and reduces, occur surging phenomenon.For this reason, devise anti-surge installation, as:
Application number: 201120029652.X discloses a kind of Anti-surge device of axial flow fan, comprise shell, inner ring, be placed in equally distributed guide vane between shell and inner ring, be placed in shell one end and be connected as a single entity with it draw fluid director, it is characterized in that described guide vane installs arc length angle α is 50-70 °.This model utility can effectively prevent blower fan departing from stall generation surging phenomenon under nominal situation or the state of emergency, ensures the Anti-surge device of axial flow fan of ventilation system safe operation.
Application number: 201220315922.8 provide a kind of anti-surge installation of Counter rotating axial flow Fan and have its Counter rotating axial flow Fan.Wherein, the anti-surge installation of Counter rotating axial flow Fan, comprising: the first cylindrical shell, is arranged on the outer circumferential of the first blade of Counter rotating axial flow Fan, is formed with the first return flow line between the inwall of the first cylindrical shell and the circumferential outer edge of the first blade; Second cylindrical shell, is connected with the first cylindrical shell, and the second cylindrical shell is arranged on the outer circumferential of the second blade of axial-flow blower, is formed with the second return flow line between the inwall of the second cylindrical shell and the circumferential outer edge of the second blade.Solve the surge problems produced when running operating point in prior art reaches hump.
Summary of the invention
Technical problem to be solved in the utility model is: provide a kind of subway tunnel axial-flow blower anti-surge installation, effectively can prevent axial-flow blower from surge occurring departing under operating point, and not affect the efficiency of blower fan.
The utility model technical problem is realized by following proposal: a kind of subway tunnel axial-flow blower anti-surge installation, at least be located at the side of impeller, comprise surge ring shell, shunting inner ring and guide vane, wherein: described surge ring depth H is 0.2-0.3 times of impeller blade height, described impeller blade top stretches to 0.3-0.5 times that the axial distance L of surge ring is leaf top chord length.
The utility model is specially adapted to the large-scale axial flow type blower fan in the engineerings such as subway, railway and vcehicular tunnel, prevent the blocking due to ventilation system pipe network, or train reverse driving moment resistance is excessive windward, the air quantity of blower fan declines to a great extent, and raising fan efficiency, effectively reduce energy consumption.
On such scheme basis, described guide vane is prismatic blade or arc shaped blade, and the string of prismatic blade and arc shaped blade is 45 ° ~ 65 ° with axial angle α.
On such scheme basis, described guide vane is that 100mm-250mm is uniform along impeller shaft by pitch.
On such scheme basis, for the reversible axial-flow blower of clockwise and anticlockwise, the utility model anti-surge installation is arranged on impeller both sides.
The utility model superiority is: by the optimization of structural design, is arranged on axial-flow blower, effectively can prevent the generation of surge.Can be widely used in the Tunnel Ventilation System engineerings such as subway, railway and highway.Be particularly suitable for the subway tunnel blower of impeller diameter 1000mm-4000mm, can effectively prevent surging phenomenon from occurring.
Accompanying drawing explanation
Fig. 1 is partial schematic sectional view of the present utility model;
Fig. 2 is partial enlarged drawing schematic diagram in Fig. 1;
Fig. 3 is B-B sectional view in Fig. 2;
Number in the figure illustrates:
1---shunting inner ring;
2---surge ring shell;
3---guide vane;
4---impeller.
Embodiment
As Fig. 1 be partial schematic sectional view of the present utility model, Fig. 2 is for partial enlarged drawing schematic diagram in Fig. 1 and Fig. 3 are in Fig. 2 shown in B-B sectional view:
A kind of subway tunnel axial-flow blower anti-surge installation, be located at the side of impeller 4, the i.e. intake grill end of blower fan, comprise surge ring shell 2, shunting inner ring 1 and guide vane 3, wherein: described surge ring depth H is 0.2-0.3 times of impeller blade 4 height, described impeller 4 blade top stretches to 0.3-0.5 times that the axial distance L of surge ring is leaf top chord length.
Described guide vane 3 is prismatic blade or arc shaped blade, and the string of guide vane and the axial angle α of impeller shaft are 45 ° ~ 65 °.
Further, described guide vane 3 is that 100mm-250mm is uniform along the rotating shaft of impeller 4 by pitch.
For the axial-flow blower that clockwise and anticlockwise is reversible, the utility model anti-surge installation is arranged on impeller both sides, that is: only side before and after impeller need be installed the utility model anti-surge installation separately.
Claims (4)
1. a subway tunnel axial-flow blower anti-surge installation, at least be located at the side of impeller (4), comprise surge ring shell (2), shunting inner ring (1) and guide vane (3), it is characterized in that: described surge ring depth H is 0.2-0.3 times of impeller blade (4) height, the axial distance L that surge ring is stretched on described impeller (4) blade top is 0.3-0.5 times that leaf top chord is grown.
2. subway tunnel axial-flow blower anti-surge installation according to claim 1, is characterized in that, described guide vane (3) is prismatic blade or arc shaped blade, and the string of prismatic blade and arc shaped blade is 45 ° ~ 65 ° with axial angle α.
3. the anti-surge installation of tunnel according to claim 1 axial-flow blower, is characterized in that, described guide vane (3) is that 100mm-250mm is uniform along the rotating shaft of impeller (4) by pitch.
4. subway tunnel axial-flow blower anti-surge installation according to claim 1, is characterized in that, for the reversible axial-flow blower of clockwise and anticlockwise, anti-surge installation is arranged on impeller both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520289803.3U CN205064390U (en) | 2015-05-07 | 2015-05-07 | Axial fan surge preventing device for subway tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520289803.3U CN205064390U (en) | 2015-05-07 | 2015-05-07 | Axial fan surge preventing device for subway tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205064390U true CN205064390U (en) | 2016-03-02 |
Family
ID=55390953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520289803.3U Expired - Fee Related CN205064390U (en) | 2015-05-07 | 2015-05-07 | Axial fan surge preventing device for subway tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205064390U (en) |
-
2015
- 2015-05-07 CN CN201520289803.3U patent/CN205064390U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 201806 Shanghai city Jiading District qingneng Road No. 55 Patentee after: SHANGHAI NAUTILUS GENERAL EQUIPMENT MANUFACTURING Co.,Ltd. Address before: 201821 Shanghai City, Zhangpu Jiading District Juyuan Industrial Development Zone, Road No. 155 Patentee before: SHANGHAI NAUTILUS GENERAL EQUIPMENT MANUFACTURING Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 201806 Shanghai city Jiading District qingneng Road No. 55 Patentee after: Yingfei Tongren fan Co.,Ltd. Address before: 201806 Shanghai city Jiading District qingneng Road No. 55 Patentee before: SHANGHAI NAUTILUS GENERAL EQUIPMENT MANUFACTURING Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 |