CN205349433U - Differential sealing device - Google Patents
Differential sealing device Download PDFInfo
- Publication number
- CN205349433U CN205349433U CN201521052476.6U CN201521052476U CN205349433U CN 205349433 U CN205349433 U CN 205349433U CN 201521052476 U CN201521052476 U CN 201521052476U CN 205349433 U CN205349433 U CN 205349433U
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- oil
- negative pressure
- malleation
- seat ring
- ball valve
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Abstract
This device is one kind and solves the pressure differential sealing device that steam that the grease chamber's oil leak of turbine unit axle bush and bearing seal emerge got into the grease chamber, including the malleation passageway, and oil return negative pressure passage, the ball valve, the manometer is said in the seat circle, the contact -type sealing tooth, seat circle outer course gets rid of the oil pocket, seat circle, malleation gas pitcher, negative pressure gas pitcher, wicket, sealed oily vacuum oil tank. The intermediate position of saying with the seat retainer outer course is opened in the seat retainer respectively to the malleation passageway, and the malleation passageway passes through ball valve and manometer and connects back and malleation gas pitcher intercommunication, forms oil return negative pressure passage getting rid of oil pocket lower end fluting, after oil return negative pressure passage passes through the ball and connects with the manometer and the negative pressure gas pitcher feed through. Can reduce the seepage of axle bush fluid under malleation compressed air's effect, stop shaft -packing leakage and cause aqueous steam to get into, it is moisture in the reduction oil, prevent oily emulsification and degraded phenomenon.
Description
One, technical field
This device is the sealing device that a kind of thorough solution Steam Turbine bearing shell grease chamber's leakage of oil, the axle steam emerged of envelope enter grease chamber.
Two, background technology
Turbine rotor is to support by bearing shell, and the lubricating oil in bearing shell is sealed by inner grease retainer and the outer oil catch of bearing shell.Dynamic and static gaps is all there is between turbine rotor and oil catch, when steam turbine high speed rotates, lubricating oil can ooze out along between rotor and oil catch, temperature near high pressure cylinder is at 150-300 DEG C, lubricating oil drops on fire hazardous on high-temperature pipe and cylinder, for preventing oil catch leakage of oil, grease chamber from adopting tiny structure to run, grease chamber's vacuum cavitations is at 100-200Pa.
Bearing shell grease chamber is tiny structure, and when axle seals excesssive gap or axial seal pressure is excessive, the steam that axle envelope is emerged enters negative pressuren zone grease chamber, makes lubricating oil oil mixed with water, and the turbine regulating system adjusted for liquid can cause governing system bite.Because of load swing, destroy bearing shell oil film and formed, cause burning accident；Because of lubricating oil oil mixed with water, to lubricating oil oil strain, the labor intensity of workman must be added；High-temperature steam oil catch leakage of oil direct carbonization, can make the carbide of oil catch attachment black, and the accumulation of carbide easily makes unit produce the adverse consequencess such as vibration.
The main cause of electromotor bearing shell oil catch leakage of oil is that unit design defect causes negative pressure to set up.Oil scraper ring step is too low, and oil pipe line is installed unreasonable.And dynamo bearing room return line is transformed, including mist extractor blower fan, oil hydrogen segregation apparatus, the transformation time is long, configuration difficulty.
Three, summary of the invention
This device in order that the oil catch leakage of oil of bearing shell room, the gland steam leakage that solve to exist in background technology and a kind of differential pressure seal device of proposing.
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, Seal Oil vaccum fuel tank 13 form.
The purpose of this device is achieved in that contact seals tooth 6 and is embedded in seat ring the top of road 5 and seat ring outer course 7 respectively, positive pressure passageway (1) is opened in road in seat ring (5) and the centre position of seat ring outer course (7) respectively, positive pressure passageway 1 is connected with malleation gas tank 10 after being connected with Pressure gauge 4 by ball valve 3, forming oil return negative pressure channel 2 getting rid of oil pocket 8 bottom slot, oil return negative pressure channel 2 is connected with negative pressure gas tank 10 after being connected with Pressure gauge 4 by ball valve 3.
Compression gas passes into the positive passage 1 of oil pressure by malleation gas tank 10 through Pressure gauge 4, ball valve 3, compression gas 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 and directly reclaim into Seal Oil vaccum fuel tank 13 by oil return negative pressure channel 2 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 effectiveness under positive pressure air sealing function, stops shaft-packing leakage and causes moisture steam to enter, and reduces Water in oil, it is prevented that oil emulsifying and aging.Required compression air, supply gas pressure is slightly greater than atmospheric pressure, can reduce air moisture, arranges wicket 12 in malleation gas tank 10 side, it is simple to collect condensed water.
Four, accompanying drawing explanation
Fig. 1 is the general construction schematic diagram of this device.
Five, detailed description of the invention
In this device, the thickness of seat ring 9 presses 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 be selected for 0-1.6MPa, Pressure gauge 4 exit connects ball valve 3 equally and is easy to repair demolition, the tooth-like sealing tooth 6 of contact that in seat ring, road 5 and seat ring outer course 7 top are inlayed, contact seal tooth 6 material can be copper tooth, and contact seals tooth and ensures 0-0.05mm gap with steam turbine rotor shaft.Compression gas passes into the positive passage 1 of oil pressure by malleation gas tank 10 through Pressure gauge 4, ball valve 3, compression gas 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 and directly reclaim into Seal Oil vaccum fuel tank 13 by oil return negative pressure channel 2 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), Seal Oil vaccum fuel tank (13) forms, it is characterized in that: positive pressure passageway (1) is opened in road in seat ring (5) and the centre position of seat ring outer course (7) respectively, positive pressure passageway (1) is connected with malleation gas tank (10) after being connected with Pressure gauge (4) by ball valve (3), oil return negative pressure channel (2) is formed getting rid of oil pocket (8) bottom slot, oil return negative pressure channel (2) is connected 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 |
|---|---|---|---|
| CN201521052476.6U CN205349433U (en) | 2015-12-17 | 2015-12-17 | Differential sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521052476.6U CN205349433U (en) | 2015-12-17 | 2015-12-17 | Differential sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205349433U true CN205349433U (en) | 2016-06-29 |
Family
ID=56168362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521052476.6U Active CN205349433U (en) | 2015-12-17 | 2015-12-17 | Differential sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205349433U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386801A (en) * | 2015-12-17 | 2016-03-09 | 哈尔滨通能电气股份有限公司 | Differential pressure type sealing device |
| CN107269712A (en) * | 2017-07-26 | 2017-10-20 | 广西柳航墙材工业有限公司 | A kind of sealing structure of high-efficiency helical vacuum extruding form machine |
-
2015
- 2015-12-17 CN CN201521052476.6U patent/CN205349433U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386801A (en) * | 2015-12-17 | 2016-03-09 | 哈尔滨通能电气股份有限公司 | Differential pressure type sealing device |
| CN107269712A (en) * | 2017-07-26 | 2017-10-20 | 广西柳航墙材工业有限公司 | A kind of sealing structure of high-efficiency helical vacuum extruding form machine |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |