CN201173151Y - Pressure matching device - Google Patents
Pressure matching device Download PDFInfo
- Publication number
- CN201173151Y CN201173151Y CNU2008200022369U CN200820002236U CN201173151Y CN 201173151 Y CN201173151 Y CN 201173151Y CN U2008200022369 U CNU2008200022369 U CN U2008200022369U CN 200820002236 U CN200820002236 U CN 200820002236U CN 201173151 Y CN201173151 Y CN 201173151Y
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- CN
- China
- Prior art keywords
- compressor
- exhaust
- bearing chamber
- gas turbocharger
- air outlet
- 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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Abstract
The utility model relates to a pressure matching device used in the waste turbine supercharger. The pressure matching device comprises a connection pipe (50) positioned between an air outlet (22) of the compressor of the waste turbine supercharger and a bearing chamber (11) of the waste turbine supercharger, wherein, an inverted valve (52) is arranged in the connection pipe (50), and when overpressure exists at the air outlet (22) of the compressor opposite to the bearing chamber (11), the inverted valve is closed, therefore, in any situation, negative pressure difference exists on the sealing elements between the bearing chamber and the compressor or the turbine, and the leakage of the compressor and / or the turbine can be reliably prevented.
Description
Technical field
The utility model relates to the exhaust-gas turbocharger field that is used for boosting internal combustion engine.The utility model relates to a kind of device that is used for carrying out the pressure coupling in the compressor zone of this exhaust-gas turbocharger.
Background technique
Exhaust-gas turbocharger is applied to improve the power of internal-combustion engine (reciprocating engine).Exhaust-gas turbocharger comprises the exhaust turbine of the exhaust flow that is arranged in internal-combustion engine and the compressor that is arranged in the intake duct of internal-combustion engine.The exhaust flow of the launched machine of turbine of exhaust turbine places rotation and passes through the active wheel of axle Driven Compressor.Compressor has improved the pressure in the intake duct of internal-combustion engine, thereby has more substantial air to arrive the firing chamber when air inlet.Exhaust turbine also is used as the work turbine machine.In this case, they are not the compressors that drives exhaust-gas turbocharger, but drive motor or drive other machine work parts by connection set.
Axle is that the exhaust-gas turbocharger that supports of sliding bearing normally comes lubricated from the oil (engine oil) of the lubrication oil circulation of internal-combustion engine.Since axle rotate very fast (the about 80m/s of the peripheral velocity in radial bearing), preferably use contactless Sealing, enter the space that is positioned at rotor-end of compressor and turbo machine from bearing member to prevent lubricant oil.Simultaneously, these Sealings are used for the gas leakage of limit compression machine air to the grease chamber.
The reserve function of contactless Sealing is not very big.If depend on equipment, boundary conditions departs from normal value, if perhaps geometrical shape changes owing to wearing and tearing or polluting (coking of oil), oil leakage may take place for this so.In compressor side, this ground contamination compressor passage or be connected the supercharging of internal combustion engine air-cooler of back of having caused being out of favour.At the turbine pusher side, the oil of leakage is coking or arrival exhaust steam passage in the zone of turbine shaft, may cause unwelcome blue smoke by burning there.Because the environmental sensitivity that improves, this just difficult more quilt of a specified duration is more tolerated.
Particularly in the application of locomotive (traction), at boosting internal combustion engine, normally the running time in the idle running of the degree of depth of diesel engine is long.Under this operating condition, this device, promptly internal combustion engine turbocharger is worked in air-breathing running, because under given turbo charger speed situation, compressor does not form pressure.This produces negative pressure at air outlet slit place of compressor, this negative pressure may be-40 to-50mbar.The inside that this negative pressure extends to exhaust-gas turbocharger intercepts air assembly, and this obstruct air assembly causes the negative pressure reduction (turbine pusher side and compressor side) on the Sealing.Should may cause oil leakage again by negative pressure, oil leakage particularly may cause in the zone at the sealing cover and the turbine disk generation coking or cause already mentioned blue smoke at the turbine pusher side under the extreme case.
A kind of possible remedial measure is to reach out for a kind of valve (" vacuum interrupter ") that is used to avoid/reduce the maximum possible negative pressure.Yet, need certain cracking pressure (negative pressure) for this valve, and when bearing housing is in overvoltage, still remain on the negative pressure reduction of existence on the Sealing.
The model utility content
Task of the present utility model is to improve the seal arrangement of exhaust-gas turbocharger.
According to the utility model, the air outlet slit of compressor is connected with bearing chamber with safety check in being located at this connecting tube by connecting tube.The negative pressure that this pressure coalignment utilization exists on certain operation point at the air outlet slit place of compressor is to form in the bearing chamber than intercepting stronger negative pressure in the air assembly.Therefore under any circumstance, on the Sealing between bearing chamber and compressor or the turbo machine, there is negative pressure drop, thereby can prevents the leakage in compressor and/turbo machine reliably.
Safety check is used at the operating condition that has overvoltage at the air outlet slit place of compressor, being connected between the air outlet slit of close compressor and the bearing chamber.Therefore prevented that compressor air from flowing into bearing chamber.
Can be additionally provided on the optional throttle valve (Drosselblende) in the connecting tube, one side is used to regulate the air quantity from the bearing chamber suction, and is used on the other hand limiting the leakage mass flow on the safety check or under the situation that occurs on the pipe-line system of pressure coalignment of the present utility model damaging.
For restriction in aspiration procedure enters the amount of the mist of oil of the air outlet slit of compressor, oil mist separator can be set in connecting tube alternatively.
For the amount that makes suction is as much as possible little, syphon tube is set in can be alternatively in the oil drain out of exhaust-gas turbocharger.
Device of the present utility model has also been guaranteed to be in bearing chamber under the situation of overvoltage and has been kept sealing.
Description of drawings
Describe embodiment of the present utility model in detail by accompanying drawing below.Here:
Fig. 1 shows the view of exhaust-gas turbocharger;
Fig. 2 shows as the lubricant oil supply system of the exhaust-gas turbocharger of Fig. 1 along a plurality of deformation programs of II-II side cross sectional view and pressure coalignment of the present utility model a)-d).
Embodiment
Fig. 1 shows exhaust-gas turbocharger, and this pressurized machine comprises typical parts (from the left side): filter and sound damper 21 (can be replaced by air intake pipe alternatively), compressor, bearing housing, exhaust turbine.In the figure, have only these housings respectively as seen, promptly compressor housing 2, bearing housing 1 and turbine cylinder 3.In compressor, air is inhaled into by filter and sound damper 21 and the air outlet slit 22 by compressor is introduced into the firing chamber.At the exhaust gas turbine pusher side, the waste gas of heat is introduced by the gas inlet 31 of single track or multiple tracks and is discharged by the gas outlet 32 that is used for exhaust.Corresponding flow direction is represented with arrow.
Fig. 2 shows the bearing housing 1 of exhaust-gas turbocharger along the II-II side cross sectional view.This sectional view has exposed the lubricant oil supply system of turbine shaft bearing.Lubricant oil is introduced bearing chamber by oil supplying device 41 from the top.Collecting container and oil drain out 42 are positioned at the bottom.The details of turbine shaft and bearing is not illustrated.Be the bearing chamber supplying lubricating oil, and mention that bearing chamber is with respect to other parts, particularly air or the sealing of waste gas guiding channel of exhaust-gas turbocharger as beginning.
According to the utility model, the air outlet slit of compressor 22 is connected with bearing chamber by connecting tube 50.In this connecting tube 50, be provided with safety check 52.For example the negative pressure that exists at the air outlet slit place of compressor in the air-breathing running of internal-combustion engine is utilized, to form negative pressure in bearing chamber.Therefore realized on Sealing, having negative pressure drop, thereby can prevent from reliably to leak in compressor and/or the turbo machine.At the normal operation condition that has overvoltage at the air outlet slit place of compressor with respect to bearing chamber, being connected between the air outlet slit that safety check 52 is used for close compressor and the bearing chamber.Therefore prevented that compressor air from flowing into bearing chamber.
Fig. 2 shows a plurality of deformation programs of connecting tube 50.Deformation program a) only has a safety check.
Except safety check, throttle valve (Drosselblende) 53 can also be set in connecting passage 50.This throttle valve is used to regulate the air quantity from the bearing chamber suction on the one hand, and is used on the other hand limiting the leakage mass flow on the safety check or under the situation that occurs on the pipe-line system of pressure coalignment of the present utility model damaging.In Fig. 2, deformation program c) and d) has throttle valve.
For restriction in aspiration procedure enters the amount of the mist of oil of the air outlet slit of compressor, oil mist separator 51 can be set in connecting tube 50 additionally.In Fig. 2, deformation program b) and d) has oil mist separator 51.
For the amount that makes suction is as much as possible little, syphon tube is set in can be alternatively in the oil drain out 42 of exhaust-gas turbocharger.
If be provided with a plurality of parts in connecting tube 50 of the present utility model, the order of each parts plays a secondary role so, in principle order of preference arbitrarily.In this sense, shown embodiment only is exemplary order.If oil mist separator 51 is arranged on the upstream of miscellaneous part, also just says close more bearing chamber 11 in connecting tube 50, then this may for prevent miscellaneous part contaminated be favourable.
List of numerals:
The bear box of 1 exhaust-driven turbo-charger exhaust-gas turbo charger
11 bearing chambers
The compressor housing of 2 exhaust-driven turbo-charger exhaust-gas turbo chargers
21 filter and sound dampers at the air intlet place of compressor
The air outlet slit of 22 compressors
The turbine cylinder of 3 exhaust-gas turbochargers
The gas inlet of 31 exhaust turbines
The gas outlet of 32 exhaust turbines
41 oil supplying devices
42 oil drain outs
50 at the air intlet of compressor and the connecting tube between the bearing chamber
51 oil mist separators
52 safety check
53 throttle valve
Claims (6)
1. the pressure coalignment in exhaust-gas turbocharger, it comprises the connecting tube (50) between the bearing chamber (11) of the air outlet slit (22) of the compressor that is positioned at exhaust-gas turbocharger and exhaust-gas turbocharger, wherein, in this connecting tube (50), be provided with safety check (52), when locate with respect to bearing chamber (11) when having overvoltage this closure of check ring at the air outlet slit (22) of compressor.
2. pressure coalignment as claimed in claim 1 is characterized in that, is additionally provided with throttle valve (53) in described connecting tube (50).
3. pressure coalignment as claimed in claim 1 or 2 is characterized in that, is additionally provided with oil mist separator (51) in described connecting tube (50).
4. pressure coalignment as claimed in claim 3 is characterized in that, the most close bearing chamber of described oil mist separator (51) is arranged in the connecting tube (50) (11).
5. each described pressure coalignment in the claim as described above is characterized in that, is provided with syphon tube in the zone of the oil drain out (42) of the bearing chamber (11) of exhaust-gas turbocharger.
6. exhaust-gas turbocharger, it comprises compressor, exhaust turbine and each described pressure coalignment in the claim as described above, this pressure coalignment connects the air outlet slit (22) of compressor and the bearing chamber (11) of exhaust-gas turbocharger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200022369U CN201173151Y (en) | 2008-01-24 | 2008-01-24 | Pressure matching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200022369U CN201173151Y (en) | 2008-01-24 | 2008-01-24 | Pressure matching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201173151Y true CN201173151Y (en) | 2008-12-31 |
Family
ID=40200268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200022369U Expired - Fee Related CN201173151Y (en) | 2008-01-24 | 2008-01-24 | Pressure matching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201173151Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10851690B2 (en) | 2017-11-23 | 2020-12-01 | Innio Jenbacher Gmbh & Co Og | Internal combustion engine with a turbo charger unit |
-
2008
- 2008-01-24 CN CNU2008200022369U patent/CN201173151Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10851690B2 (en) | 2017-11-23 | 2020-12-01 | Innio Jenbacher Gmbh & Co Og | Internal combustion engine with a turbo charger unit |
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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: 20081231 Termination date: 20110124 |