CN202012501U - Combined type shaft end seal - Google Patents
Combined type shaft end seal Download PDFInfo
- Publication number
- CN202012501U CN202012501U CN2010206602204U CN201020660220U CN202012501U CN 202012501 U CN202012501 U CN 202012501U CN 2010206602204 U CN2010206602204 U CN 2010206602204U CN 201020660220 U CN201020660220 U CN 201020660220U CN 202012501 U CN202012501 U CN 202012501U
- Authority
- CN
- China
- Prior art keywords
- carbocyclic ring
- sealing
- axle head
- seal
- combined type
- 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
Links
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model discloses a combined type shaft end seal, located at a shaft end of a main shaft between a fan casing and an impeller root, and comprising a labyrinth seal, a floating type carbocyclic ring seal and a nitrogen purge apparatus; the labyrinth seal is located at the impeller root and fits with the shaft end; the floating type carbocyclic ring seal is located at one side of the casing and fits with the shaft end; the shaft end between the labyrinth seal and the floating type carbocyclic ring seal is provided with the nitrogen purge apparatus. The combined type shaft end seal of the utility model reaches the purpose of non-leakage of the fan shaft end seal gas; and moreover the combined type shaft end seal meets the requirements of cavity pressurization experiment so as to solve the problem that a traditional gas fan is easy to leak gas and blast.
Description
Technical field
The utility model relates to a kind of shaft end seal, is specifically related to a kind of combined type axle head sealing.
Background technique
The general import of gas-blowing engine is a negative pressure, what traditional gas-blowing engine sealing was adopted is single labyrinth seal or carbocyclic ring sealing, be easy to occur axle head gas leakage problem, air enters in the machine He behind the coal gas volume mixing certain proportion and can blast by shaft end seal, thereby not only entail dangers to workman's life safety also can cause phenomenons such as atmospheric pollution.For being strictly on guard against the phenomenon of gas leakage, the utility model designs a kind of combined type axle head sealing and reaches blower fan shaft end seal gas zero leakage purpose, and by cavity pressurization experimental requirements.
The model utility content
The model utility purpose: the purpose of this utility model is to provide a kind of combined type axle head sealing, to remedy the fried problem of traditional gas-blowing engine leakiness gas explosion.
Technological scheme: for achieving the above object, the utility model provides a kind of combined type axle head sealing, main-axis end position between fan casing and impeller root, described combined type axle head sealed packet is drawn together labyrinth seal, the sealing of floating type carbocyclic ring and nitrogen purging device, described labyrinth seal is arranged on the impeller root position and axle head is fitted, described floating type carbocyclic ring sealing is positioned at casing one side and fits with axle head, and the axle head between labyrinth seal and the sealing of floating type carbocyclic ring is provided with nitrogen purging device.
The material of described labyrinth seal is the broach matrix of aluminium alloy plate, is contained on the static seal, and leakage rate is generally less than 0.5% of blower fan mass flow rate.
The material of described labyrinth seal is the broach matrix of aluminium alloy plate, is whole machine shaping on the seal of cast aluminium at material directly, and leakage rate is generally less than 0.5% of blower fan mass flow rate.
Described floating type carbocyclic ring sealing is formed by being arranged in the sealing case relocatable carbocyclic ring more than three groups or three groups, every group of carbocyclic ring by a coil spring banding graphite make can three lobe ring cylindricals of selflubricating on, carbocyclic ring limits its rotation with the side that contacts of sealing case by the rotation inhibiting pin, and the endoporus and the main shaft of carbocyclic ring have radial clearance.
Beneficial effect: combined type axle head sealing of the present utility model can effectively prevent gas leakage by sealer with assembled, thereby labyrinth seal is quickened and slows down to reduce leakage rate to consume pressure in seal clearance place and Seal cage internal clearance by forcing fluid, and leakage rate is generally less than 0.5% of blower fan mass flow rate; Floating type carbocyclic ring sealing is by under the differential pressure action, one side of carbocyclic ring is attached on the side of sealing case, carbocyclic ring was also slightly unsteady to some extent under spring action when running shaft was slightly beated, and air-flow then is subjected to throttling and reduces leakage in the radial clearance of carbocyclic ring endoporus and axle; Chamber between the carbocyclic ring group reaches zero leakage by being preset with the import and export of nitrogen that adds high pressure through labyrinth seal body and lip-type packing, O-ring seals.
Description of drawings
Fig. 1 is a scheme of installation of the present utility model;
Fig. 2 is a structural representation of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments:
Combined type axle head sealing as shown in drawings, main shaft 3 axle heads 4 positions between fan casing 1 and impeller 2 roots, described combined type axle head sealed packet is drawn together labyrinth seal 5, the sealing 6 of floating type carbocyclic ring and nitrogen and is purged 7 devices, described labyrinth seal 5 is arranged on impeller 2 root positions and axle head 4 is fitted, described floating type carbocyclic ring sealing 6 is positioned at casing 1 one sides and fits with axle head 4, and the axle head 4 between labyrinth seal 5 and the floating type carbocyclic ring sealing 6 is provided with nitrogen and purges 7 devices.
The material of described labyrinth seal 5 is the broach matrix of aluminium alloy plate, be contained on the static seal or be whole machine shaping on the seal of cast aluminium directly at material, leakage rate is generally less than 0.5% of blower fan mass flow rate, clear up under the not blocked prerequisite of Seal cage and seal groove, thereby labyrinth seal 5 is quickened and slows down to reduce leakage rate to consume pressure in seal clearance place and Seal cage internal clearance by forcing fluid, and leakage rate is generally less than 0.5% of blower fan mass flow rate; Described floating type carbocyclic ring sealing 6 is formed by being arranged on sealing case 8 interior relocatable carbocyclic rings more than three groups or three groups, chamber between the carbocyclic ring group reaches zero leakage by being preset with the import and export of nitrogen that adds high pressure through labyrinth seal body and lip-type packing, O-ring seals.
Claims (4)
1. combined type axle head sealing, be positioned at main shaft (3) axle head (4) position between fan casing (1) and impeller (2) root, it is characterized in that: described combined type axle head sealed packet is drawn together labyrinth seal (5), floating type carbocyclic ring sealing (6) and nitrogen and is purged (7) device, described labyrinth seal (5) is arranged on impeller (2) root position and axle head (4) is fitted, described floating type carbocyclic ring sealing (6) is positioned at casing (1) one side and fits with axle head (4), and the axle head (4) between labyrinth seal (5) and the floating type carbocyclic ring sealing (6) is provided with nitrogen and purges (7) device.
2. combined type axle head sealing according to claim 1, it is characterized in that: the material of described labyrinth seal (5) is the broach matrix of aluminium alloy plate, is contained on the static seal.
3. combined type axle head according to claim 1 sealing, it is characterized in that: the material of described labyrinth seal (5) is the broach matrix of aluminium alloy plate, is whole machine shaping on the seal of cast aluminium at material directly.
4. combined type axle head sealing according to claim 1, it is characterized in that: described floating type carbocyclic ring sealing (6) is formed by being arranged on the interior relocatable carbocyclic ring of sealing case (8) more than three groups or three groups, every group of carbocyclic ring by a coil spring banding graphite make can three lobe ring cylindricals of selflubricating on, carbocyclic ring limits its rotation with the side that contacts of sealing case (8) by the rotation inhibiting pin, and the endoporus of carbocyclic ring and main shaft (3) have radial clearance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206602204U CN202012501U (en) | 2010-12-15 | 2010-12-15 | Combined type shaft end seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206602204U CN202012501U (en) | 2010-12-15 | 2010-12-15 | Combined type shaft end seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202012501U true CN202012501U (en) | 2011-10-19 |
Family
ID=44783114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206602204U Expired - Fee Related CN202012501U (en) | 2010-12-15 | 2010-12-15 | Combined type shaft end seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202012501U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364117A (en) * | 2010-12-15 | 2012-02-29 | 南通大通宝富风机有限公司 | Combined shaft end seal |
| CN103939607A (en) * | 2013-01-22 | 2014-07-23 | 天华化工机械及自动化研究设计院有限公司 | Integrated shaft end sealing device |
| CN103953574A (en) * | 2014-02-25 | 2014-07-30 | 杭州杭氧工装泵阀有限公司 | Shaft seal structure of low temperature pump and sealing gas control system of shaft seal |
-
2010
- 2010-12-15 CN CN2010206602204U patent/CN202012501U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364117A (en) * | 2010-12-15 | 2012-02-29 | 南通大通宝富风机有限公司 | Combined shaft end seal |
| CN103939607A (en) * | 2013-01-22 | 2014-07-23 | 天华化工机械及自动化研究设计院有限公司 | Integrated shaft end sealing device |
| CN103939607B (en) * | 2013-01-22 | 2016-06-29 | 天华化工机械及自动化研究设计院有限公司 | A kind of integration type shaft end sealing device |
| CN103953574A (en) * | 2014-02-25 | 2014-07-30 | 杭州杭氧工装泵阀有限公司 | Shaft seal structure of low temperature pump and sealing gas control system of shaft seal |
| CN103953574B (en) * | 2014-02-25 | 2016-11-23 | 杭州杭氧工装泵阀有限公司 | The shaft seal structure of a kind of cryopump and axle are sealed gas control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111019 Termination date: 20131215 |