CN201851395U - Shaft blower fan device with burning preventing motor - Google Patents
Shaft blower fan device with burning preventing motor Download PDFInfo
- Publication number
- CN201851395U CN201851395U CN2010202585534U CN201020258553U CN201851395U CN 201851395 U CN201851395 U CN 201851395U CN 2010202585534 U CN2010202585534 U CN 2010202585534U CN 201020258553 U CN201020258553 U CN 201020258553U CN 201851395 U CN201851395 U CN 201851395U
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- CN
- China
- Prior art keywords
- motor
- impeller
- blower fan
- auxiliary
- impellers
- 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 - Lifetime
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Abstract
The utility model relates to a steam extraction blow fan, in particular to a shaft blower fan device with a burning preventing motor, which is applied to the steam extraction blow fan of a gland seal heater in a power station steam extraction and supply system. The device comprises the motor, a volute casing and impellers, and is characterized in that the impellers are arranged on a motor shaft; the impellers comprise a main impeller and an auxiliary impeller; the main impeller and the auxiliary impeller are coaxial and arranged in the volute casing; the main impeller and the auxiliary impeller are arranged back to back; and the auxiliary impeller is arranged between the motor and the main impeller. The device has the advantages that the impellers are driven by the motor to rotate, so that a negative pressure zone is formed between the auxiliary impeller and the volute casing in the direction of the motor, that is, steam current in the zone forms circulation back to the motor. Therefore, the device effectively avoids the phenomenon that the motor is frequently burnt as steam is leaked to the device of the motor.
Description
Technical field
The utility model relates to a kind of blower fan that draws gas, and is meant that especially the anti-profile shaft that burns of a kind of motor adds blower fan apparatus, and it is to be used for power plant to take out the blower fan that draws gas on the steam-supplying system gland heater.
Background technique
Steam does not leak outside in the cylinder in order to guarantee to be in operation steam turbine, needs leakage vapour with turbine shaft seal be directed to gland heater by pipeline and handles.Existing technical solution is by the blower fan work on the gland heater that is installed in steam turbine, makes in gland heater and the extraction line and forms negative pressure state.But owing to existing axle adds the blade wheel structure reason of blower fan, being in operation makes and has formed local barotropic state between impeller back and spiral case, thereby causes steam to enter motor, causes coil short, so that the motor phenomenon occurs burning through regular meeting.
Summary of the invention
The purpose of this utility model is to overcome the deficiency in the background technique and provides the anti-profile shaft that burns of a kind of motor to add blower fan apparatus, it is that the local barotropic state described in the background technique is eliminated, make the air-flow between auxiliary impeller and spiral case form the circulation of motor dorsad, enter motor to avoid steam.
The technical solution of the utility model is:
The anti-profile shaft that burns of a kind of motor adds blower fan apparatus, and it comprises: motor, spiral case, impeller is characterized in that: described impeller is arranged on the motor shaft; Impeller is made of main impeller and auxiliary impeller, and auxiliary impeller is coaxial with main impeller, is arranged in the spiral case; Adopt back-to-back major-minor blade wheel structure mode, auxiliary impeller is arranged between motor and the main impeller.
Advantage of the present utility model is: rotate by the driven by motor impeller, make and form a negative pressuren zone between the spiral case of assisting impeller and motor drive direction, promptly make this location air-flow form the circulation of motor dorsad, thereby prevent effectively owing to steam frequently takes place to the incident of burning motor that this device seepage of motor causes.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Below in conjunction with Fig. 1 the utility model is described further.
Embodiment:
As shown in Figure 1, the anti-profile shaft that burns of the utility model motor adds blower fan apparatus, and it comprises: motor 1, spiral case 2, impeller 5, it is characterized in that: impeller 5 installs on the motor shaft 6, impeller 5 is made of main impeller 3 and auxiliary impeller 4, and auxiliary impeller 4 is coaxial with main impeller 3, is arranged in the spiral case 2; Auxiliary impeller 4 is arranged between motor 1 and the main impeller 3, has adopted back-to-back major-minor blade wheel structure form.
Existence just because of auxiliary impeller 4, zone when making fan operation between auxiliary impeller 4 and spiral case 2 and motor shaft 6 forms a negative pressure band, formed an air-flow path of motor dorsad, thereby prevented from frequently to take place because of steam enters the phenomenon of burning that motor causes.
Claims (1)
1. the anti-profile shaft that burns of motor adds blower fan apparatus, and it comprises: motor, spiral case, impeller is characterized in that: described impeller is arranged on the motor shaft; Impeller is made of main impeller and auxiliary impeller; Auxiliary impeller is coaxial with main impeller, is arranged in the spiral case; Adopt back-to-back major-minor blade wheel structure mode, auxiliary impeller is arranged between motor and the main impeller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202585534U CN201851395U (en) | 2010-07-08 | 2010-07-08 | Shaft blower fan device with burning preventing motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202585534U CN201851395U (en) | 2010-07-08 | 2010-07-08 | Shaft blower fan device with burning preventing motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201851395U true CN201851395U (en) | 2011-06-01 |
Family
ID=44093788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202585534U Expired - Lifetime CN201851395U (en) | 2010-07-08 | 2010-07-08 | Shaft blower fan device with burning preventing motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201851395U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762817A (en) * | 2016-12-23 | 2017-05-31 | 安徽六国化工股份有限公司 | A kind of improved centrifugal high pressure fan for reducing air quantity leakage |
-
2010
- 2010-07-08 CN CN2010202585534U patent/CN201851395U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762817A (en) * | 2016-12-23 | 2017-05-31 | 安徽六国化工股份有限公司 | A kind of improved centrifugal high pressure fan for reducing air quantity leakage |
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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 |
Granted publication date: 20110601 |
|
| CX01 | Expiry of patent term |