CN103362855A - Shaft seal of nuclear grade centrifugal fan - Google Patents
Shaft seal of nuclear grade centrifugal fan Download PDFInfo
- Publication number
- CN103362855A CN103362855A CN2012100965640A CN201210096564A CN103362855A CN 103362855 A CN103362855 A CN 103362855A CN 2012100965640 A CN2012100965640 A CN 2012100965640A CN 201210096564 A CN201210096564 A CN 201210096564A CN 103362855 A CN103362855 A CN 103362855A
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- China
- Prior art keywords
- water conservancy
- conservancy diversion
- blower
- volute
- air returning
- 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.)
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Abstract
The invention discloses a shaft seal of a nuclear grade centrifugal fan. The shaft seal comprises a transmission shaft and a fan volute. A flow guiding air returning cavity wrapped by a flow guiding air returning cavity casing is arranged on the right side of the fan volute, the fan volute and the flow guiding air returning cavity are in clearance fit with the transmission shaft, one end of an air returning pipe is further connected in the flow guiding air returning cavity, the other end of the air returning pipe is connected with a fan air inlet, sealing fillers are arranged at the right end of the flow guiding air returning cavity, the sealing fillers and the transmission shaft are matched closely, a sealing cover is arranged on the sealing fillers, and the sealing cover is further fixedly connected with the flow guiding air returning cavity casing. The shaft seal solves the problem in the prior art and has the advantages of being reasonable in structure, simple in maintaining, low in leakage quantity, safe and reliable and the like.
Description
Technical field
The present invention relates to a kind of shaft sealing, be specifically related to a kind of shaft sealing of examining grade centrifugal blower.
Background technique
Partly stipulate by BA among U.S.'s " nuclear air and gas treatment rules " ASME AG 1-2003 that at present ventilator is followed in the nuclear power station in the world, its axle of centrifugal blower of carrying radial ray air or gas is leaked limit value is: 0.01% of blower fan nominal air delivery/every 249Pa blower pressure, or less than 0.852m
3/ h, both get large value.Owing to must have certain interval between the axle of centrifugal blower running and the static spiral case, the spiral case memory, external memory is at certain pressure reduction (being formed by blower fan internal pressure and external pressure) simultaneously, therefore must carry out encapsulation process to axle, the Leakage prevention amount surpasses predetermined range and causes 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 large when installing in addition, easily causing running wearing and tearing heating and the lubricating grease in the filler is flowed out, and needs often to adjust or change filler, and maintenance period is short.Although the effect of the mechanical seal device anti-leak in blower, compressor is really fine, but mechanism is too complicated: need extra fuel feeding or air feeder to seal, another axle sealing structure that uses in other industry---also because need to add nitrogen guarantee sealing effect, its drawback was the same with mechanical seal for carbon ring seal in the last few years.
Summary of the invention
The purpose of invention: for addressing the above problem, the invention provides a kind of rational in infrastructure, shaft sealing of safeguarding simple, low leakage, safe and reliable nuclear level centrifugal blower.
Technological scheme: for achieving the above object, the present invention adopts following technological scheme:
A kind of shaft sealing of examining grade centrifugal blower, comprise transmission shaft and volute of blower, the right side of described volute of blower is provided with the water conservancy diversion return-air chamber of water conservancy diversion return-air cavity shell parcel, be Spielpassung between described volute of blower and water conservancy diversion return-air chamber and the transmission shaft, also be connected with an end of muffler in the described water conservancy diversion return-air chamber, the other end of muffler is connected with the general mood intake grill, the right-hand member in described water conservancy diversion return-air chamber is provided with stuffing box packing, described stuffing box packing and transmission shaft closely cooperate, sealing cover is installed in the stuffing box packing, and sealing cover also is fixedly connected with water conservancy diversion return-air cavity shell.
Described volute of blower also is equipped with stiffening plate in a side that is connected with water conservancy diversion return-air cavity shell, and the continuous full weld of stiffening plate is on volute of blower.
The mode of of the present invention taking " combining the two ways of dredging and plugging ", again be back to suction port by the water conservancy diversion muffler major part internal leakage gas out between spiral case and transmission shaft, that is to say that most of internal leakage gas is still in the blower fan inner loop, really not leaking into the outside goes, but in real the use, the axle gas leakage can not all enter in the water conservancy diversion muffler, therefore adding filler in outermost one deck of this axle sealing structure seals again, the shutoff pressure that this moment, filler partly bore is very low, therefore the life-span of filler can increase greatly, and whole anti-leak result also will improve greatly.
Beneficial effect: the present invention is rational in infrastructure, maintenance is simple, low leakage, safe and reliablely be difficult for causing wearing and tearing and fever phenomenon, thereby prolongs by a relatively large margin stuffing box packing working life.
Description of drawings
Fig. 1 is structural representation of the present invention.
Embodiment
A kind of shaft sealing of examining grade centrifugal blower as shown in Figure 1, comprise transmission shaft 1 and volute of blower 2, the right side of volute of blower 2 is provided with the water conservancy diversion return-air chamber 4 of water conservancy diversion return-air cavity shell 3 parcels, be Spielpassung between described volute of blower 2 and water conservancy diversion return-air chamber 4 and the transmission shaft 1, also be connected with an end of muffler 5 in the water conservancy diversion return-air chamber 4, the other end of muffler 5 is connected with the general mood intake grill, the right-hand member in water conservancy diversion return-air chamber 4 is provided with stuffing box packing 6, described stuffing box packing 6 closely cooperates with transmission shaft 1, sealing cover 7 is installed in the stuffing box packing 6, sealing cover 7 also is fixedly connected with water conservancy diversion return-air cavity shell 3, volute of blower 2 also is equipped with stiffening plate 8 in a side that is connected with water conservancy diversion return-air cavity shell 3, and stiffening plate 8 continuous full welds are on volute of blower 2.
Claims (2)
1. shaft sealing of examining grade centrifugal blower, comprise transmission shaft and volute of blower, it is characterized in that: the right side of described volute of blower is provided with the water conservancy diversion return-air chamber of water conservancy diversion return-air cavity shell parcel, be Spielpassung between described volute of blower and water conservancy diversion return-air chamber and the transmission shaft, also be connected with an end of muffler in the described water conservancy diversion return-air chamber, the other end of muffler is connected with the general mood intake grill, the right-hand member in described water conservancy diversion return-air chamber is provided with stuffing box packing, described stuffing box packing and transmission shaft closely cooperate, sealing cover is installed in the stuffing box packing, and sealing cover also is fixedly connected with water conservancy diversion return-air cavity shell.
2. the shaft sealing of nuclear level centrifugal blower according to claim 1, it is characterized in that: described volute of blower also is equipped with stiffening plate in a side that is connected with water conservancy diversion return-air cavity shell, and the continuous full weld of stiffening plate is on volute of blower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100965640A CN103362855A (en) | 2012-04-05 | 2012-04-05 | Shaft seal of nuclear grade centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100965640A CN103362855A (en) | 2012-04-05 | 2012-04-05 | Shaft seal of nuclear grade centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103362855A true CN103362855A (en) | 2013-10-23 |
Family
ID=49364919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100965640A Pending CN103362855A (en) | 2012-04-05 | 2012-04-05 | Shaft seal of nuclear grade centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103362855A (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 |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58122398A (en) * | 1982-01-13 | 1983-07-21 | Ryonichi Kk | Seal device of pump shaft |
| CN2660189Y (en) * | 2003-10-26 | 2004-12-01 | 江苏申海集团股份有限公司 | Simmer kernel-class centrifugal fan |
| CN2876392Y (en) * | 2005-09-22 | 2007-03-07 | 中意机电(湖北)鼓风机制造有限公司 | Centrifugal air blower of sulfuric acid |
| CN201027692Y (en) * | 2007-04-12 | 2008-02-27 | 湖北湖风机械制造有限公司 | Sulphuric acid centrifugal blower |
| CN201225338Y (en) * | 2008-07-16 | 2009-04-22 | 夏亦秋 | Centrifugal blower |
| CN101818741A (en) * | 2010-01-28 | 2010-09-01 | 太仓市三耐化工设备有限公司 | Refluxing device of inserted fan |
| CN101818743A (en) * | 2010-01-28 | 2010-09-01 | 太仓市三耐化工设备有限公司 | Impeller sealing device |
| CN102072191A (en) * | 2010-11-19 | 2011-05-25 | 苏州顶裕节能设备有限公司 | Sealing structure of shaft of fan |
| CN201865957U (en) * | 2010-11-30 | 2011-06-15 | 贵州省鼓风机厂 | Strong corrosion resistant gas ventilator |
| CN202545335U (en) * | 2012-04-05 | 2012-11-21 | 南通大通宝富风机有限公司 | Shaft seal of nuclear-grade centrifugal fan |
-
2012
- 2012-04-05 CN CN2012100965640A patent/CN103362855A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58122398A (en) * | 1982-01-13 | 1983-07-21 | Ryonichi Kk | Seal device of pump shaft |
| CN2660189Y (en) * | 2003-10-26 | 2004-12-01 | 江苏申海集团股份有限公司 | Simmer kernel-class centrifugal fan |
| CN2876392Y (en) * | 2005-09-22 | 2007-03-07 | 中意机电(湖北)鼓风机制造有限公司 | Centrifugal air blower of sulfuric acid |
| CN201027692Y (en) * | 2007-04-12 | 2008-02-27 | 湖北湖风机械制造有限公司 | Sulphuric acid centrifugal blower |
| CN201225338Y (en) * | 2008-07-16 | 2009-04-22 | 夏亦秋 | Centrifugal blower |
| CN101818741A (en) * | 2010-01-28 | 2010-09-01 | 太仓市三耐化工设备有限公司 | Refluxing device of inserted fan |
| CN101818743A (en) * | 2010-01-28 | 2010-09-01 | 太仓市三耐化工设备有限公司 | Impeller sealing device |
| CN102072191A (en) * | 2010-11-19 | 2011-05-25 | 苏州顶裕节能设备有限公司 | Sealing structure of shaft of fan |
| CN201865957U (en) * | 2010-11-30 | 2011-06-15 | 贵州省鼓风机厂 | Strong corrosion resistant gas ventilator |
| CN202545335U (en) * | 2012-04-05 | 2012-11-21 | 南通大通宝富风机有限公司 | Shaft seal of nuclear-grade centrifugal fan |
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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Application publication date: 20131023 |