CN2547926Y - Anti-surge two-way axial-flow fan - Google Patents
Anti-surge two-way axial-flow fan Download PDFInfo
- Publication number
- CN2547926Y CN2547926Y CN 02240670 CN02240670U CN2547926Y CN 2547926 Y CN2547926 Y CN 2547926Y CN 02240670 CN02240670 CN 02240670 CN 02240670 U CN02240670 U CN 02240670U CN 2547926 Y CN2547926 Y CN 2547926Y
- Authority
- CN
- China
- Prior art keywords
- welded
- water conservancy
- conservancy diversion
- motor
- ring
- Prior art date
- 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 - Fee Related
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Abstract
The utility model relates to a bidirectional axial-flow fan and is characterized in that the front inside a guide outer ring is evenly welded with a plurality of front guide vanes; a front guide inner ring is welded through the front guide vanes; the rear inside the guide outer ring is evenly welded with a plurality of rear guide vanes, through which a rear guide inner ring is welded; a ring-shaped covering piece is welded in the guide outer ring arranged between the front guide inner ring and the rear guide inner ring;a support is fixedly arranged in a motor jacket and is welded inside the rear guide inner ring, a motor is fixedly arranged through the motor jacket, an impeller is arranged on a motor shaft of the motor, a fairing is arranged through the impeller. The utility model has the advantages that the bidirectional axial-flow fan can avoid the surging phenomenon in case of the small flow rate of the fan, and reach the aim of stable operation of the fan and the aim of greatly improving the service life of the fan.
Description
Technical field
The utility model belongs to two-way axial-flow blower, particularly relates to a kind of two-way axial-flow blower that is used for the anti-surge of ventilations such as subway, highway and railway tunnel, building and air-cooled occasion.
Background technique
Present known applied two-way axial-flow blower, though have characteristic of simple structure, but owing to do not have the function of anti-surge in this body structure, then in its aeroperformance characteristic, when the operating point of blower fan moved on to a certain small flow district in left side of performance curve, flow, pressure by ventilator and pipe network can produce fierce pulsation, and air-flow progressively separates and blocks at blade tip, cause the high vibration of whole device, i.e. surging phenomenon.Surge makes fan operation extremely unstable, and strong mechanical vibration meeting causes the damage of device, so blower fan does not allow to move under surging condition.
Summary of the invention
But but the utility model provides the two-way axial-flow blower of the anti-surge of a kind of not only forward operation but also inverted running for solving the technical problem that exists in the known technology.
The technological scheme that the utility model is taked for the technical problem that exists in the solution known technology is:
Anterior uniform several pieces pre-turning vane sheets that are welded in the water conservancy diversion outer shroud, encircle in the water conservancy diversion before being welded by several pieces pre-turning vane sheets, uniform several pieces back guide vanes that are welded in rear portion in the water conservancy diversion outer shroud, encircle in the water conservancy diversion after afterwards guide vanes have been welded by several pieces, the annular covering part also is welded in the water conservancy diversion outer shroud between the ring in ring and the back water conservancy diversion in preceding water conservancy diversion, support be installed in the motor sheath and be welded in the back water conservancy diversion in the ring in, be fixed with motor by the motor sheath, on its motor shaft, impeller is installed, cowling is housed by impeller.
Advantage and the good effect that the utlity model has are: avoid surging phenomenon to take place in the time of can allowing two-way axial-flow blower move in the small flow district, reach fan operation and stablize and improve greatly the blower fan purpose in working life.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the left side TV structure schematic representation of Fig. 1.
Embodiment
For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
See also Fig. 1 and Fig. 2, with several pieces pre-turning vane sheet 2 uniform front portions that are welded in water conservancy diversion outer shroud 1, encircle 3 in the water conservancy diversion before being welded again by pre-turning vane sheet 2, also uniform several pieces back guide vanes 7 that are welded in rear portion in water conservancy diversion outer shroud 1, present embodiment is all selected pre-turning vane sheet and back guide vane for use 24.Connect and state, encircle 6 in the water conservancy diversion after being welded by back guide vane 7, annular covering part 4 also is welded in the water conservancy diversion outer shroud 1 between the ring 6 in ring 3 and the back water conservancy diversion in preceding water conservancy diversion.To support 8 be packed on the motor sheath 9 after, being welded in the ring 6, is packed in motor 10 in the motor sheath 9 in the water conservancy diversion of back again, and impeller 5 is installed on the motor shaft that stretches out motor sheath 9, by impeller 5 cowling 11 is housed.
Operating principle of the present utility model is, when the utility model moves in forward small flow district, the air communication that is blocked in blade tip cross do not hide district II and preceding water conservancy diversion district I (by encircle 3 in the preceding water conservancy diversion, water conservancy diversion outer shroud 1 and pre-turning vane sheet 2 constitute) bypass channel formed, the tangential velocity of the air-flow of obstruction is eliminated and along the forward main flow direction A in bypass channel inflow the utility model; When the utility model moves in reverse small flow district, the air communication that is blocked in blade tip cross do not hide district III and preceding water conservancy diversion district IV (by encircle 6 in the water conservancy diversion of back, water conservancy diversion outer shroud 1 and back guide vane 7 constitute) bypass channel formed, the tangential velocity of the air-flow of obstruction is eliminated and along the reverse main flow direction B in bypass channel inflow the utility model; Be not difficult to find out by above analysis and eliminated airflow obstruction, thereby make two-way axial-flow blower no matter be at forward, or effectively avoid the generation of surge during in the operation of reverse small flow district, expanded two-way axial-flow blower forward and reverse operation area.The utility model can also be applied to the ventilation in special operation places such as colliery, oil and chemical industry after carrying out anticorrosion and explosion-proof processing.
Claims (1)
1. the two-way axial-flow blower of an anti-surge, it is characterized in that: anterior uniform several pieces pre-turning vane sheets that are welded in the water conservancy diversion outer shroud, encircle in the water conservancy diversion before being welded by several pieces pre-turning vane sheets, uniform several pieces back guide vanes that are welded in rear portion in the water conservancy diversion outer shroud, encircle in the water conservancy diversion after afterwards guide vanes have been welded by several pieces, the annular covering part also is welded in the water conservancy diversion outer shroud between the ring in ring and the back water conservancy diversion in preceding water conservancy diversion, support be installed in the motor sheath and be welded in the back water conservancy diversion in the ring in, be fixed with motor by the motor sheath, on its motor shaft, impeller is installed, cowling is housed by impeller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02240670 CN2547926Y (en) | 2002-06-25 | 2002-06-25 | Anti-surge two-way axial-flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02240670 CN2547926Y (en) | 2002-06-25 | 2002-06-25 | Anti-surge two-way axial-flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2547926Y true CN2547926Y (en) | 2003-04-30 |
Family
ID=33713724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02240670 Expired - Fee Related CN2547926Y (en) | 2002-06-25 | 2002-06-25 | Anti-surge two-way axial-flow fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2547926Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1313737C (en) * | 2005-01-27 | 2007-05-02 | 上海交通大学 | Anti-surge ring of axial fan |
| CN105697421A (en) * | 2016-03-23 | 2016-06-22 | 江苏大学 | Saddle-area-free axial flow fan |
| CN109826829A (en) * | 2019-03-01 | 2019-05-31 | 南通迪瓦特节能风机有限公司 | Underground fan anti-surge installation |
-
2002
- 2002-06-25 CN CN 02240670 patent/CN2547926Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1313737C (en) * | 2005-01-27 | 2007-05-02 | 上海交通大学 | Anti-surge ring of axial fan |
| CN105697421A (en) * | 2016-03-23 | 2016-06-22 | 江苏大学 | Saddle-area-free axial flow fan |
| CN109826829A (en) * | 2019-03-01 | 2019-05-31 | 南通迪瓦特节能风机有限公司 | Underground fan anti-surge installation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |