CN2660189Y - Simmer kernel-class centrifugal fan - Google Patents
Simmer kernel-class centrifugal fan Download PDFInfo
- Publication number
- CN2660189Y CN2660189Y CN 200320110494 CN200320110494U CN2660189Y CN 2660189 Y CN2660189 Y CN 2660189Y CN 200320110494 CN200320110494 CN 200320110494 CN 200320110494 U CN200320110494 U CN 200320110494U CN 2660189 Y CN2660189 Y CN 2660189Y
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- CN
- China
- Prior art keywords
- return
- air return
- air
- volute
- return cavity
- 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 discloses a simmer core centrifugal blower, including a fan volute, a transmission shaft and an air return cavity arranged at the rear of the fan volute. The air return cavity is communicated with the gap between the fan volute and the transmission shaft; one end of an air return pipe is communicated with the air return cavity and the other end with the air intake of the fan; and a sealed filler is arranged at the rear of the air return cavity. The reasonable structure of the utility model is that the existing filler simmer structure of centrifugal fan is added with the air return cavity and pipe, so that the high-speed leaking air through the gap between the shaft and the volute shell returns to the air return cavity, decelerates and then spreads into turbulence; meanwhile the pressure in the air return cavity is significantly decreased and the pressure for sealing and filling is correspondingly reduced, thus not easily causing wear and fever and further greatly extending the service life of the sealed filler.
Description
Technical field:
The utility model relates to a kind of centrifugal blower, is a kind of nuclear safe level centrifugal blower of carrying nuclear air or gas.
Background technique:
Fixed by U.S.'s " nuclear air and gas treatment rules " ASME-AG 1 BA, to its leakage limit value of centrifugal blower of carrying radial ray air or gas be: 0.01% of blower fan nominal air delivery/every 250Pa blower pressure, or less than 0.85m
3/ h, both get big value.Have certain interval between the axle of centrifugal blower running and the static spiral case, therefore the spiral case memory, external memory must carry out encapsulation process at certain pressure reduction, prevents that leakage rate from surpassing predetermined range and causing the nuclear radiocontamination.
At present, the filler mode is taked in known centrifugal blower shaft sealing usually, with the leakage-gap between filler filling, shutoff axle and the spiral case.Its shortcoming is not tight to gas seal, and poor reliability, leakage rate tend to surpass above-mentioned code requirement; Required impacting force is big when installing in addition, causing running wearing and tearing heating easily and the lubricating grease in the filler is flowed out, and needs often to adjust or change filler, and maintenance period is short.
Summary of the invention:
It is a kind of rational in infrastructure that the purpose of this utility model is to provide, and the level centrifugal blower is examined in low leakage, safe and reliable shaft sealing.
Technical solution of the present utility model is:
A kind of shaft sealing nuclear level centrifugal blower, comprise volute of blower, transmission shaft, its feature: the return-air chamber is set at the volute of blower rear, return-air chamber and volute of blower communicate with gap between the transmission shaft, one end of muffler communicates with the return-air chamber, the other end of muffler communicates with air inlet, and rear, return-air chamber is provided with stuffing box packing.
The return-air chamber is formed around transmission shaft by the return-air cavity shell that is connected with the spiral case stiffening plate, between spiral case stiffening plate and return-air cavity shell sealing gasket is set.The sealing cover that dress is connected with the return-air cavity shell in the stuffing box packing.
The utility model is rational in infrastructure, in existing centrifugal blower filler axle sealing structure, increase return-air chamber, muffler, the gas that leaks with high flow velocities from axle and spiral case gap is to the return-air chamber, deceleration also diffuses into turbulent flow, by muffler with the gas pumping that leaks to air inlet, thereby reduce an axle leakage rate significantly; Simultaneously the return-air cavity pressure significantly reduces, and the corresponding minimizing of the required impacting force of stuffing box packing is difficult for causing wearing and tearing and heating phenomenon, thereby prolongs stuffing box packing working life by a relatively large margin.
Description of drawings:
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is an embodiment's of the utility model a configuration diagram.
Fig. 2 is the configuration diagram of Fig. 1 axis hermetic unit.
Embodiment:
A kind of shaft sealing nuclear level centrifugal blower, comprise that volute of blower 5, motor 8 are by 10 rotations of transmission shaft 9 impeller, at volute of blower 5 rears return-air chamber 3 is set, return-air chamber 3 and volute of blower 5 communicate with gap between the transmission shaft 9, one end of muffler 1 communicates with return-air chamber 3, the other end of muffler 1 communicates with air inlet 2, and 3 rears, return-air chamber are provided with stuffing box packing 6.
Return-air chamber 3 is formed around transmission shaft 9 by the return-air cavity shell 12 that is connected with spiral case stiffening plate 11, and 12 of spiral case stiffening plate 11 and return-air cavity shells are provided with sealing gasket 4.The sealing cover 7 that dress is connected with return-air cavity shell 12 in the stuffing box packing 6.Spiral case stiffening plate 11 continuous full welds are on volute of blower 5.
Claims (3)
1, a kind of shaft sealing nuclear level centrifugal blower, comprise volute of blower, transmission shaft, it is characterized in that: the return-air chamber is set at the volute of blower rear, return-air chamber and volute of blower communicate with gap between the transmission shaft, one end of muffler communicates with the return-air chamber, the other end of muffler communicates with air inlet, and rear, return-air chamber is provided with stuffing box packing.
2, shaft sealing nuclear level centrifugal blower according to claim 1, it is characterized in that: the return-air chamber is formed around transmission shaft by the return-air cavity shell that is connected with the spiral case stiffening plate, between spiral case stiffening plate and return-air cavity shell sealing gasket is set.
3, shaft sealing nuclear level centrifugal blower according to claim 2 is characterized in that: the sealing cover that dress is connected with the return-air cavity shell in the stuffing box packing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320110494 CN2660189Y (en) | 2003-10-26 | 2003-10-26 | Simmer kernel-class centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320110494 CN2660189Y (en) | 2003-10-26 | 2003-10-26 | Simmer kernel-class centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2660189Y true CN2660189Y (en) | 2004-12-01 |
Family
ID=34343736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320110494 Expired - Fee Related CN2660189Y (en) | 2003-10-26 | 2003-10-26 | Simmer kernel-class centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2660189Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362855A (en) * | 2012-04-05 | 2013-10-23 | 南通大通宝富风机有限公司 | Shaft seal of nuclear grade centrifugal fan |
| CN110578698A (en) * | 2019-10-18 | 2019-12-17 | 云汇环保科技南通有限公司 | Negative pressure sealing device for fan |
| CN112855604A (en) * | 2021-01-12 | 2021-05-28 | 桂林理工大学 | Sealing system for sulfur dioxide fan |
-
2003
- 2003-10-26 CN CN 200320110494 patent/CN2660189Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362855A (en) * | 2012-04-05 | 2013-10-23 | 南通大通宝富风机有限公司 | Shaft seal of nuclear grade centrifugal fan |
| CN110578698A (en) * | 2019-10-18 | 2019-12-17 | 云汇环保科技南通有限公司 | Negative pressure sealing device for fan |
| 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 | ||
| 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 |