CN201795050U - Magnetic fluid seal structure for thrust bearing of mixed-flow turbine - Google Patents
Magnetic fluid seal structure for thrust bearing of mixed-flow turbine Download PDFInfo
- Publication number
- CN201795050U CN201795050U CN2010202773162U CN201020277316U CN201795050U CN 201795050 U CN201795050 U CN 201795050U CN 2010202773162 U CN2010202773162 U CN 2010202773162U CN 201020277316 U CN201020277316 U CN 201020277316U CN 201795050 U CN201795050 U CN 201795050U
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- China
- Prior art keywords
- magnetic fluid
- magnet
- magnetizer
- bearing
- thrust bearing
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
A magnetic fluid seal structure for a thrust bearing of a mixed-flow turbine aims at improving seal performance of a thrust bearing of a mixed-flow turbine. A rotating wheel (1) is installed at the lower end of a turbine rotating shaft (2). A magnetic fluid seal mechanism (4) is mounted between a thrust bearing (5) and an engine rotor (3) and comprises magnetic fluid (9), a first magnetizer (7), a second magnetizer (7') and a permanent magnet (10), wherein the first magnetizer (7) and the second magnetizer (7') are respectively installed on a generator lower bracket (6); the permanent magnet (10) is installed between the two magnetizers; gaps are reserved between the first magnetizer (7) and the second magnetizer (7') and an upper structure; and the magnetic fluid (9) is filled in the gaps. Under constraint of magnetic forces, the magnetic fluid (9) gathers together to form a seal space so as to form a magnetic fluid seal structure.
Description
Technical field
The utility model relates to the magnetic fluid sealing structure of Francis turbine rotating shaft.
Background technique
The Francis turbine thrust-bearing is one of its critical piece, is directly connected to the working life of Francis turbine its working life.Cause bearing wear and peripheral impurity enters bearing inside, and the leakage of bearing oil is easy to cause the permanent damages of thrust-bearing.Traditional method adopts seal ring to seal, but because relatively rotating between the different parts, the seal ring that makes is quick-wearing very, and loses sealing effect.
Summary of the invention
The purpose of this utility model is to improve the sealability of Francis turbine thrust-bearing.
The utility model is a Francis turbine thrust-bearing magnetic fluid sealing structure, runner 1 is installed in the lower end of water turbine rotating shaft 2, magnet fluid sealing mechanism 4 is installed between thrust-bearing 5 and the engine rotor 3, magnet fluid sealing mechanism 4 comprises magnetic fluid 9, first magnet case 7, second magnet case 7 ', permanent magnet 10, first magnet case 7 is installed respectively on generator undercarriage 6, second magnet case 7 ', permanent magnet 10 is installed between two magnet cases, first magnet case 7, second magnet case 7 ' leave the gap with superstructure, be full of magnetic fluid 9 during this time in the crack, under the constraint of magnetic force, magnetic fluid 9 is flocked together, constitute the space of sealing, form magnetic fluid sealing structure.
The utility model adopts the magnet fluid sealing bearing technology, utilize the magnetic liquid can be by the characteristic of magnetic control, utilize the annular permanent-magnet body to produce the Magnetic field distribution of a ring-type at the rotary seal parts, thereby magnetic liquid can be constrained among the magnetic field and form " zero " shape ring of magnetic liquid, and wearing and tearing can not accomplished long-life dynamic seal (packing).After adopting this structure, the Francis turbine of being studied, obviously prolong working life, and solved the puzzlement easy wear problems of mixed-flow wheel machine bearing for many years always.
Description of drawings
Fig. 1 is integral installation figure of the present utility model, the structural drawing of Fig. 2 magnetic fluid sealing structure, reference character and corresponding name are called: runner 1, water turbine rotating shaft 2, generator amature 3, magnet fluid sealing mechanism 4, thrust-bearing 5, generator undercarriage 6, first magnet case 7, second magnet case 7 ', the magnetic line of force 8, magnetic fluid 9, permanent magnet 10.
Embodiment
As Fig. 1; shown in Figure 2; the utility model is a Francis turbine thrust-bearing magnetic fluid sealing structure; runner 1 is installed in the lower end of water turbine rotating shaft 2; magnet fluid sealing mechanism 4 is installed between thrust-bearing 5 and the engine rotor 3; magnet fluid sealing mechanism 4 comprises magnetic fluid 9; first magnet case 7; second magnet case 7 '; permanent magnet 10; first magnet case 7 is installed respectively on generator undercarriage 6; second magnet case 7 '; permanent magnet 10 is installed between two magnet cases; first magnet case 7; second magnet case 7 ' leave the gap with superstructure; be full of magnetic fluid 9 during this time in the crack; under the constraint of magnetic force; magnetic fluid 9 is flocked together; constitute the space of sealing, form magnetic fluid sealing structure, the protection thrust-bearing.
The utility model effectively solves the Francis turbine introduced contaminants and enters bearing, causes the problem of the oil leak of bearing wear and thrust-bearing, prolongs bearing working life, solves the operating problems of bearing.Not only solved the problem of ring wear, and sealing effect adopts seal ring to increase.
Claims (1)
1. Francis turbine thrust-bearing magnetic fluid sealing structure, runner (1) is installed in the lower end of water turbine rotating shaft (2), it is characterized in that magnet fluid sealing mechanism (4) is installed between thrust-bearing (5) and the engine rotor (3), magnet fluid sealing mechanism (4) comprises magnetic fluid (9), first magnet case (7), second magnet case (7 '), permanent magnet (10), first magnet case (7) is installed respectively on generator undercarriage (6), second magnet case (7 '), permanent magnet (10) is installed between two magnet cases, first magnet case (7), second magnet case (7 ') leaves the gap with superstructure, is full of magnetic fluid (9) during this time in the crack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202773162U CN201795050U (en) | 2010-07-26 | 2010-07-26 | Magnetic fluid seal structure for thrust bearing of mixed-flow turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202773162U CN201795050U (en) | 2010-07-26 | 2010-07-26 | Magnetic fluid seal structure for thrust bearing of mixed-flow turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201795050U true CN201795050U (en) | 2011-04-13 |
Family
ID=43849958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202773162U Expired - Fee Related CN201795050U (en) | 2010-07-26 | 2010-07-26 | Magnetic fluid seal structure for thrust bearing of mixed-flow turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201795050U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104343687A (en) * | 2013-07-31 | 2015-02-11 | 思科涡旋科技(杭州)有限公司 | Scroll vacuum pump with magnetofluid horizontal moving sliding thrust bearing and sealing structure |
| CN112196950A (en) * | 2020-10-28 | 2021-01-08 | 清华大学 | Chain link lubricated and sealed by magnetic liquid and chain with chain link |
| US11353088B2 (en) | 2020-10-28 | 2022-06-07 | Tsinghua University | Chain unit sealed and lubricated with magnetic fluid and chain having same |
-
2010
- 2010-07-26 CN CN2010202773162U patent/CN201795050U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104343687A (en) * | 2013-07-31 | 2015-02-11 | 思科涡旋科技(杭州)有限公司 | Scroll vacuum pump with magnetofluid horizontal moving sliding thrust bearing and sealing structure |
| CN104343687B (en) * | 2013-07-31 | 2016-12-28 | 思科涡旋科技(杭州)有限公司 | There is magnetic fluid translation slide thrust bearing and seal the scroll vacuum pump of structure |
| CN112196950A (en) * | 2020-10-28 | 2021-01-08 | 清华大学 | Chain link lubricated and sealed by magnetic liquid and chain with chain link |
| US11353088B2 (en) | 2020-10-28 | 2022-06-07 | Tsinghua University | Chain unit sealed and lubricated with magnetic fluid and chain having same |
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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: 20110413 Termination date: 20130726 |