CN2214564Y - Dynamic sealing protecting device for fan shaft - Google Patents
Dynamic sealing protecting device for fan shaft Download PDFInfo
- Publication number
- CN2214564Y CN2214564Y CN 95230493 CN95230493U CN2214564Y CN 2214564 Y CN2214564 Y CN 2214564Y CN 95230493 CN95230493 CN 95230493 CN 95230493 U CN95230493 U CN 95230493U CN 2214564 Y CN2214564 Y CN 2214564Y
- Authority
- CN
- China
- Prior art keywords
- sealing
- flange
- sealing flange
- fan shaft
- screw
- 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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- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The utility model relates to a dynamic sealing protecting device for fan shafts, which belongs to the fan shaft sealing field and is especially suitable for the dynamic seal of the circulation fan shaft of a cold-rolled steel strip cover-type annealing furnace. The key point is in that a sealing flange (8) is installed on a fan shaft and is fixed on a fan casing (12) by a screw (9); a small flange (7) is fixed at the lower end of the sealing flange (8) by a screw (10); the thickness direction of the sealing flange (8) is provided with a through hole (13) with d diameter; the through hole (13) is mutually communicated with the inner cavity D1 of the sealing flange (8); a ball valve (16) and a gas flow meter (17) are arranged on a nitrogen inlet pipe (15). The utility model has the advantages of reasonable structure and favorable sealing protecting effect.
Description
A kind of motive sealing protective gear of blower fan axle belongs to blower fan shaft sealing field, is particularly useful for the motive sealing of cold-strip steel bell type annealing furnace circulating wind arbor.
The bell-type furnace of cold-strip steel requires to carry out the annealing of coil of strip no oxygen under the shielding gas condition, general air protection has nitrogen (N
2), hydrogen (H
2) etc., require the whole system air-proof condition good, must not leak gas, otherwise not only produce the coil of strip oxidation, and cause that easily stove explodes, what wherein sealing be cannot say for sure to demonstrate,prove most is exactly the motive sealing of centrifugal blower axle, the cold-strip steel bell-type furnace has two indispensable blower fans that communicate with furnace gas, be furnace atmosphere circulation centrifugal blower and shunting cooling blower, the sealing of above-mentioned two kinds of blower fan axles, operating temperature can reach 700 ℃, near the blower fan axle, produce negative pressuren zone during work, if shaft sealing is bad, just air is sucked, its consequence is very fearful.
The purpose of this utility model is to work under high-speed condition for the motive sealing of guaranteeing the blower fan axle not leak for a long time, and is not oxidized and guarantee the manufacturing mechanism personal safety during cold-strip steel heat treatment, develops a kind of dynamic seal apparatus of centrifugal fan axle.
The utility model is to realize like this, it is to reach the inner seal ring of adorning (3) by the middle cover (2) and (6) that are installed on the blower fan axle between middle cover (2) and (6), be enclosed within the outer shroud (4) in inner seal ring (3) outside and be installed in inner seal ring (3) and the inner sealing device of the T shape oil sealing (5) of outer shroud (4) both sides formation is formed, its main points are near the inner sealing device place one sealing flange (8) to be installed on the blower fan axle, and it is fixed on the flow blower casing (12) with screw (9), little flange (7) is fixed on the lower end of sealing flange (8) by screw (10), and at the thickness direction of sealing flange (8) diameter being arranged is the through hole (13) of d and the inner chamber D of sealing flange (8)
1Communicate nitrogen (N
2) suction tude (15) links to each other with through hole (13) by silk head (14), and ball valve (16) and gas flow meter (17) are housed on nitrogen suction tude (15).
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the structural representation of sealing flange (8).
Main points of the present utility model are a design special sealing flange (8) on accelerate cooling system fan motor axle, and it is fixed on the flow blower casing (12) with screw (9), and the internal diameter of sealing flange (8) is respectively D
1And D
2, at blower fan axle and sealing flange (8) inner chamber D
1Between middle cover (2) and (6) are installed, inner seal ring (3) is housed in the middle of middle cover (2) and (6), outer shroud (4) is enclosed within the outside of inner seal ring (3), at inner seal ring (3) and outer shroud (4) both sides fourth type oil sealing (5) is installed, make it form a complete inner sealing device, little flange (7) is fixed on the lower end of sealing flange 8 with screw (10), near the termination of the little flange (7) of blower fan axle side and the inside diameter D of sealing flange (8)
2Whole inner sealing device stably is limited to D
1In the space that forms with the blower fan axle.At the thickness direction of sealing flange (8) diameter being arranged is the inside diameter D of through hole (13) Yu the sealing flange (8) of d
1Communicate, purpose is to make shielding gas nitrogen (N
2) or hydrogen (H
2) under the effect of negative pressuren zone, can enter in the shaft sealing district, at this moment seal area is full of the nitrogen of certain pressure, forms the nitrogen protection district at seal space, and indoor air also is difficult to enter, shielding gas nitrogen (N
2) can not locate to be equipped with nitrogen (N at sealing flange through hole (13) to external leakage yet
2) suction tude (15) and go up mounting ball valve (16) and gas flow meter (17) at oxygen intake pipe (15), to monitor nitrogen (N
2) enter situation, and, judge the seal leakage degree of blower fan axle with the size that nitrogen enters flow, the nitrogen flow shown in the flowmeter leaks serious alarm as surpassing set amount just send, and must take favourable measure this moment.
The utlity model has rational in infrastructure, good seal performance, form nitrogen (N at fan shaft2) the seal protection district, air is difficult to enter, and nitrogen can be to external leakage yet, and can in time judge the advantages such as fan shaft movable sealing degree.
The utility model is used in Angang Cold Rolled Strip Plant introduction West Germany and Austrian bell furnace, and is respond well, has very big promotional value.
Claims (1)
1; a kind of motive sealing protective gear of blower fan axle; by being installed in middle cover (2) on the blower fan axle and (6) and being contained in inner seal ring (3) between middle cover (2) and (6); be enclosed within the outer shroud (4) in inner seal ring (3) outside; the T shape oil sealing (5) that is installed in inner seal ring (3) and outer shroud (4) both sides is formed; it is characterized in that on the blower fan axle, one sealing flange (8) being installed near the inner sealing device place; and it is fixed on the flow blower casing (12) with screw (9); little flange (7) is fixed on the lower end of sealing flange (8) by screw (10), and at the thickness direction of sealing flange (8) diameter being arranged is the through hole (13) of d and the inner chamber D of sealing flange (8)
1Communicate, nitrogen suction tude (15) links to each other with through hole (13) by silk head (14), and ball valve (16) and gas flow meter (17) are housed on nitrogen suction tude (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95230493 CN2214564Y (en) | 1995-03-10 | 1995-03-10 | Dynamic sealing protecting device for fan shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95230493 CN2214564Y (en) | 1995-03-10 | 1995-03-10 | Dynamic sealing protecting device for fan shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2214564Y true CN2214564Y (en) | 1995-12-06 |
Family
ID=33875327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95230493 Expired - Fee Related CN2214564Y (en) | 1995-03-10 | 1995-03-10 | Dynamic sealing protecting device for fan shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2214564Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619767B (en) * | 2009-08-06 | 2011-08-10 | 东南大学 | Dynamic seal structure |
| CN110822098A (en) * | 2019-12-13 | 2020-02-21 | 马鞍山钢铁股份有限公司 | Shaft seal failure protection structure and application method thereof |
-
1995
- 1995-03-10 CN CN 95230493 patent/CN2214564Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619767B (en) * | 2009-08-06 | 2011-08-10 | 东南大学 | Dynamic seal structure |
| CN110822098A (en) * | 2019-12-13 | 2020-02-21 | 马鞍山钢铁股份有限公司 | Shaft seal failure protection structure and application method thereof |
| CN110822098B (en) * | 2019-12-13 | 2024-07-16 | 马鞍山钢铁股份有限公司 | Shaft seal failure protection structure and application method thereof |
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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 |