CN201650820U - Reflux device of insert type fan - Google Patents
Reflux device of insert type fan Download PDFInfo
- Publication number
- CN201650820U CN201650820U CN201020103075XU CN201020103075U CN201650820U CN 201650820 U CN201650820 U CN 201650820U CN 201020103075X U CN201020103075X U CN 201020103075XU CN 201020103075 U CN201020103075 U CN 201020103075U CN 201650820 U CN201650820 U CN 201650820U
- Authority
- CN
- China
- Prior art keywords
- reflux
- cavity
- shell
- transmission shaft
- impeller
- 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 reflux device of a fan, the fan is provided with a shell (1) and an impeller (2) and a transmission shaft (3), and the reflux device is characterized in that: the transmission shaft (3) penetrates through the shell (1) and the reflux device (5) and then one end thereof is connected with the impeller (2), and the other end thereof is connected with a motor (5); a cavity is formed between the reflux device (5) and the shell (1), a return pipe (6) is also arranged on the reflux device (5), one end of the return pipe (6) is communicated with the cavity, and the other end thereof is communicated with an air inlet (7) of the fan. When gas in the fan passes through a seal between the transmission shaft and the shell (1) and is leaked into the cavity, under the action of negative pressure attraction force at the air inlet (7), the gas leaked into the cavity is sucked into the air inlet (7) again, thereby achieving the reflux function.
Description
Technical field
The utility model relates to a kind of reflux, particularly relates to a kind of reflux of built-in type fan impeller.
Background technique
All there is leakage phenomenon in various degree in draught fan impeller of the prior art, because existing encapsulation scheme all is that the gas in the blower fan is carried out shutoff, under the very big situation of a side gas of seal arrangement, seal, even seal arrangement itself has very high sealability, long-term work under high pressure, also can make its fatigue, aging, thereby cause revealing.
Summary of the invention
The purpose of this utility model provides the reflux of the built-in type impeller of a kind of sealing load that can reduce seal arrangement one side, simple in structure, reliable performance, this device reclaims by the leakage gas to the built-in type impeller, thereby can reduce the sealing load of seal arrangement one side.
For solving the problems of the technologies described above, the utility model is taked following technological scheme: a kind of reflux of blower fan, described blower fan has shell and impeller and transmission shaft, it is characterized in that: after described transmission shaft passes described shell and described reflux, the one end is connected with described impeller, and the other end is connected with described motor; Form a cavity between described reflux and the described shell, also have recovery tube on the described reflux, an end of described recovery tube is connected with described cavity, and the other end is connected with the intake grill of blower fan.
When the gas in the blower fan is leaked in the described cavity by the sealing between transmission shaft and the described shell, under the effect of the negative pressure suction force at described intake grill place, the described gas that leaks in the cavity is sucked intake grill again, has promptly realized the function of described backflow.Because the described gas that leaks in the cavity can not be accumulated in the described cavity, therefore can not make a side of described seal ring have higher gas pressure, thereby guarantee the sealability of blower fan.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the technical solution of the utility model is elaborated.
As shown in Figure 1, blower fan has shell 1 and impeller 2, and after transmission shaft 3 passed described shell 1 and reflux 5, an end and described impeller 2 linked together by inserts, and the other end is connected with motor 5, thereby makes described motor 5 be driven described impeller 2 rotations.
Described reflux 5 has a recess, thereby and form a cavity between the described shell 1; Has seal ring between described reflux 5 and the transmission shaft.
Because described impeller 2 is installed on the described transmission shaft by inserts, therefore have the characteristics that installation and removal are convenient, Location accuracy is high, overcome inaccurate, the yielding shortcoming in location in the conventional method.
Also have recovery tube 6 on the described reflux 5, an end of described recovery tube 6 links to each other with the described cavity that forms between reflux 5 and the shell 1 of stating, and the other end is connected with the intake grill 7 of blower fan.
When the gas in the blower fan is leaked in the described cavity by the sealing between transmission shaft and the described shell 1, under the effect of the negative pressure suction force at described intake grill 7 places, the described gas that leaks in the cavity is sucked intake grill 7 again, has promptly realized the function of described backflow.
Because the described gas that leaks in the cavity can not be accumulated in the described cavity, therefore can not make a side of described seal ring have higher gas pressure, thereby guarantee the sealability of blower fan.
Claims (3)
1. the reflux of a blower fan, described blower fan has shell (1) and impeller (2) and transmission shaft (3), it is characterized in that:
After described transmission shaft (3) passed described shell (1) and described reflux (5), the one end was connected with described impeller (2), and the other end is connected with described motor (5);
Form a cavity between described reflux (5) and the described shell (1), also have recovery tube (6) on the described reflux (5), an end of described recovery tube (6) is connected with described cavity, and the other end is connected with the intake grill (7) of blower fan.
2. device as claimed in claim 1 is characterized in that: have seal ring between described reflux (5) and the transmission shaft (3).
3. device as claimed in claim 1 or 2 is characterized in that: described impeller (2) is connected with described transmission shaft (3) by inserts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020103075XU CN201650820U (en) | 2010-01-28 | 2010-01-28 | Reflux device of insert type fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020103075XU CN201650820U (en) | 2010-01-28 | 2010-01-28 | Reflux device of insert type fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201650820U true CN201650820U (en) | 2010-11-24 |
Family
ID=43116054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020103075XU Expired - Fee Related CN201650820U (en) | 2010-01-28 | 2010-01-28 | Reflux device of insert type fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201650820U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855604A (en) * | 2021-01-12 | 2021-05-28 | 桂林理工大学 | Sealing system for sulfur dioxide fan |
-
2010
- 2010-01-28 CN CN201020103075XU patent/CN201650820U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855604A (en) * | 2021-01-12 | 2021-05-28 | 桂林理工大学 | Sealing system for sulfur dioxide fan |
| CN112855604B (en) * | 2021-01-12 | 2022-10-21 | 桂林理工大学 | Sealing system for sulfur dioxide fan |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20170128 |