CN105386801A - Differential pressure type sealing device - Google Patents
Differential pressure type sealing device Download PDFInfo
- Publication number
- CN105386801A CN105386801A CN201510943578.5A CN201510943578A CN105386801A CN 105386801 A CN105386801 A CN 105386801A CN 201510943578 A CN201510943578 A CN 201510943578A CN 105386801 A CN105386801 A CN 105386801A
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- CN
- China
- Prior art keywords
- oil
- pressure
- negative pressure
- gas tank
- channel
- 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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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/18—Lubricating arrangements
- F01D25/183—Sealing means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Devices (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention discloses a differential pressure type sealing device for solving the problems that a bearing bush oil cavity of a turbine unit leaks oil and steam given off from a shaft seal enters the oil cavity. The differential pressure type sealing device comprises positive pressure channels, an oil-returning negative pressure channel, ball valves, pressure gages, a race inner channel, contact type sealing teeth, a race outer channel, an oil slinging cavity, a race, a positive pressure gas tank, a negative pressure gas tank, a water drainage door and a sealing oil vacuum oil tank. The positive pressure channels are formed in the middle of the race inner channel and the middle of the race outer channel respectively and are communicated with the positive pressure gas tank after being connected to the pressure gages through the ball valves. The lower part of the oil slinging cavity is grooved for forming the oil-returning negative pressure channel, and the oil-returning negative pressure channel is communicated with the negative pressure gas tank after being connected to the pressure gage through the ball valve. Under the effect of positive-pressure compressed air, leakage of bearing bush oil can be reduced, the phenomenon that steam containing moisture enters the oil cavity because the shaft seal leaks air can be prevented, moisture contained in the oil can be lowered, and the emulsifying and ageing phenomenon of the oil is prevented.
Description
One, technical field
The steam that this device is a kind of thorough solution steam turbine set bearing shell grease chamber's leakage of oil, shaft seal is emerged enters the seal arrangement of grease chamber.
Two, background technique
Turbine rotor supports by bearing shell, and the lubricant oil in bearing shell is sealed by the inner grease retainer of bearing shell and outer oil catch.All dynamic and static gaps is there is between turbine rotor and oil catch, when steam turbine high speed rotates, lubricant oil can ooze out along between rotor and oil catch, temperature near high-pressure cylinder is at 150-300 DEG C, lubricant oil drops on fire hazardous on high-temperature pipe and cylinder, for preventing oil catch leakage of oil, the operation of grease chamber's employing tiny structure, grease chamber's vacuum cavitations is at 100-200Pa.
Bearing shell grease chamber is tiny structure, when shaft seal excesssive gap or axial seal pressure excessive time, the steam that shaft seal is emerged enters negative pressuren zone grease chamber, makes lubricant oil oil mixed with water, for liquid adjust turbine regulating system can cause speed control system bite.Because of load swing, destroy bearing shell oil film and formed, cause burning accident; Because of lubricant oil oil mixed with water, to lubricant oil oil strain, the labor intensity of workman must be added; High-temperature steam can, oil catch leakage of oil direct carbonization, make oil catch adhere to the carbide of black, and the accumulation of carbide easily makes unit produce the adverse consequencess such as vibration.
The main cause of generator bearing shell oil catch leakage of oil is that unit design defect causes negative pressure to set up.Flinger ring step is too low, and oil pipe line is installed unreasonable.And dynamo bearing room return line is transformed, comprise cooking-fume discharging blower fan, oily hydrogen segregating unit, the transformation time is long, configuration difficulty.
Three, summary of the invention
The object of this device is a kind of differential pressure seal device leaking to solve the oil catch leakage of oil of bearing shell room, the gland steam that exist in background technique and propose.
A kind of differential pressure seal device, by road 5, contact seal tooth 6, seat ring outer course 7 in positive pressure passageway 1, oil return negative pressure channel 2, ball valve 3, pressure gauge 4, seat ring, get rid of oil pocket 8, seat ring 9, malleation gas tank 10, negative pressure gas tank 11, wicket 12, sealing oil vaccum fuel tank 13 form.
The object of this device is achieved in that contact sealing tooth 6 is embedded in the top of road 5 and seat ring outer course 7 in seat ring respectively, in seat ring, positive pressure passageway 1 is opened in the neutral position in road 5 and the neutral position of seat ring outer course 7 respectively, positive pressure passageway 1 is communicated with malleation gas tank 10 after being connected with pressure gauge 4 by ball valve 3, getting rid of oil pocket 8 bottom slot formation oil return negative pressure channel 2, oil return negative pressure channel 2 is communicated with negative pressure gas tank 10 after being connected with pressure gauge 4 by ball valve 3.
Pressurized gas passes into the positive passage 1 of oil pressure by malleation gas tank 10 through pressure gauge 4, ball valve 3, pressurized gas is road 5 and contact seal tooth 6 in seat ring respectively, annular airflow is formed between seat ring outer course 7 and contact seal tooth 6, produce malleation, the seepage of bearing shell fluid can be reduced under the compressed-air actuated effect of malleation, form negative pressure getting rid of oil pocket 8, make road 5 in seat ring, seat ring outer course 7 and contact seal tooth 6 enter negative pressure gas tank 11 by oil return negative pressure channel 2 directly reclaim into sealing oil vaccum fuel tank 13 through ball valve 3, pressure gauge 4 because of oil that is poorly sealed or that reveal.
Seat ring outer course 7 makes contact seal tooth 6 play sealing effect under positive pressure air seal action, stops shaft-packing leakage and causes moisture steam to enter, and reduces Water in oil, prevents oily emulsification and aging.Required pressurized air, supply gas pressure is greater than barometric pressure slightly, can reduce air moisture, arranges wicket 12, be convenient to collect condensed water in malleation gas tank 10 side.
Four, accompanying drawing explanation
Fig. 1 is the general construction schematic diagram of this device.
Five, embodiment
In this device, the thickness of seat ring 9 is by life size processing and fabricating, positive pressure passageway 1 and oil return negative pressure channel are by ball valve 3 Bonding pressure table 4, pressure gauge 4 can select 0-1.6MPa, pressure gauge 4 Outlet connects ball valve 3 equally and is convenient to repair demolition, what in seat ring, road 5 and seat ring outer course 7 top were inlayed contacts tooth-like sealing tooth 6, contact seal tooth 6 material can be copper tooth, and contact sealing tooth and steam turbine rotor shaft ensure 0-0.05mm gap.Pressurized gas passes into the positive passage 1 of oil pressure by malleation gas tank 10 through pressure gauge 4, ball valve 3, pressurized gas is road 5 and contact seal tooth 6 in seat ring respectively, annular airflow is formed between seat ring outer course 7 and contact seal tooth 6, produce malleation, the seepage of bearing shell fluid can be reduced under the compressed-air actuated effect of malleation, form negative pressure getting rid of oil pocket 8, make road 5 in seat ring, seat ring outer course 7 and contact seal tooth 6 enter negative pressure gas tank 11 by oil return negative pressure channel 2 directly reclaim into sealing oil vaccum fuel tank 13 through ball valve 3, pressure gauge 4 because of oil that is poorly sealed or that reveal.
Claims (1)
1. a differential pressure seal device, by ball valve 3, pressure gauge 4, road 5 in seat ring, contact seal tooth 6, seat ring outer course 7, get rid of oil pocket 8, seat ring 9, malleation gas tank 10, negative pressure gas tank 11, wicket 12, sealing oil vaccum fuel tank 13 forms, it is characterized in that: in seat ring, positive pressure passageway 1 is opened in the neutral position in road 5 and the neutral position of seat ring outer course 7 respectively, positive pressure passageway 1 is communicated with malleation gas tank 10 after being connected with pressure gauge 4 by ball valve 3, getting rid of fluting formation oil return negative pressure channel 2 below oil pocket 8, oil return negative pressure channel 2 is communicated with negative pressure gas tank 10 after being connected with pressure gauge 4 by ball valve 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510943578.5A CN105386801A (en) | 2015-12-17 | 2015-12-17 | Differential pressure type sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510943578.5A CN105386801A (en) | 2015-12-17 | 2015-12-17 | Differential pressure type sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105386801A true CN105386801A (en) | 2016-03-09 |
Family
ID=55419495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510943578.5A Pending CN105386801A (en) | 2015-12-17 | 2015-12-17 | Differential pressure type sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105386801A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59192802A (en) * | 1983-04-14 | 1984-11-01 | Toshiba Corp | Shaft seal |
| CN1854574A (en) * | 2005-04-18 | 2006-11-01 | 王胜五 | Contact sealing mechanism |
| CN203175624U (en) * | 2013-04-23 | 2013-09-04 | 大唐鲁北发电有限责任公司 | Novel airtight type oil baffle |
| CN204371432U (en) * | 2014-12-10 | 2015-06-03 | 河南龙宇煤化工有限公司 | A kind of Turbine seal formula oil catch |
| CN205349433U (en) * | 2015-12-17 | 2016-06-29 | 哈尔滨通能电气股份有限公司 | Differential sealing device |
-
2015
- 2015-12-17 CN CN201510943578.5A patent/CN105386801A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59192802A (en) * | 1983-04-14 | 1984-11-01 | Toshiba Corp | Shaft seal |
| CN1854574A (en) * | 2005-04-18 | 2006-11-01 | 王胜五 | Contact sealing mechanism |
| CN203175624U (en) * | 2013-04-23 | 2013-09-04 | 大唐鲁北发电有限责任公司 | Novel airtight type oil baffle |
| CN204371432U (en) * | 2014-12-10 | 2015-06-03 | 河南龙宇煤化工有限公司 | A kind of Turbine seal formula oil catch |
| CN205349433U (en) * | 2015-12-17 | 2016-06-29 | 哈尔滨通能电气股份有限公司 | Differential sealing device |
Non-Patent Citations (1)
| Title |
|---|
| 陈声 等: "《汽轮机油挡正压密封设计》", 《华电技术》 * |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160309 |