• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Turbo compressor for exhaust gas recirculation of an internal combustion engine, with a compressor housing (20), with a compressor rotor (21), with a shaft (22) coupled to the compressor rotor (21) and mounted in the compressor housing (20), with a piston ring seal (23), to prevent exhaust gas blow-by flow towards the bearings, and a labyrinth seal (25) positioned upstream of the piston ring seal (23) as viewed in the exhaust gas blow-by flow direction.
    公开号:CH714849B1
    申请号:CH00164/19
    申请日:2019-02-11
    公开日:2022-02-15
    发明作者:Bartholomä Klaus；Tomek Ondrej；Klima Jiri
    申请人:Man Energy Solutions Se；
    IPC主号:
    专利说明:

    The invention relates to a turbo compressor.
    [0002] Internal combustion engines with exhaust gas recirculation are familiar to the person skilled in the art addressed here. For example, exhaust gas is removed from an exhaust tract of the internal combustion engine via exhaust gas recirculation and fed to a charge air tract of the internal combustion engine in order to mix charge air, which is to be supplied to cylinders of the internal combustion engine, with exhaust gas. The exhaust gas is compressed via a turbo compressor and conveyed in the direction of the charge air tract, a turbo compressor also being referred to as a turbo compressor.
    Fig. 1 shows in cross section a detail of a known from the prior art turbo compressor of an exhaust gas recirculation of an internal combustion engine, wherein in Fig. 1 a compressor housing 10 and a compressor housing 10 rotatably mounted compressor rotor 11 are shown in detail. The compressor rotor 11 is coupled to a shaft 12 which is mounted in the compressor housing 10 via bearings (not shown). According to FIG. 1, it is already known from the prior art that a piston ring seal 13 is formed between the shaft 12 and the compressor housing 10 . Such a piston ring seal 13 at least partially prevents an exhaust gas blow-by flow 14 starting from the compressor rotor 11 in the direction of bearings (not shown).
    Proceeding from this, the object of the present invention is to create a new type of turbo compressor.
    [0005] This object is achieved by a turbo compressor according to claim 1. According to the invention, a labyrinth seal is positioned upstream of the piston ring seal, viewed in the direction of the exhaust gas blow-by flow. The additional labyrinth seal, which is positioned upstream of the piston ring seal in the direction of the exhaust gas blow-by flow, can prevent the formation of an exhaust gas blow-by flow more effectively than is possible according to the prior art.
    According to an advantageous development, a sealing air hole is present, can be guided via the sealing air in the direction of a gap formed between the piston ring seal and the labyrinth seal. This enables an even more effective suppression of the exhaust gas blow-by flow.
    According to an advantageous development, the sealing air is applied with a defined sealing air pressure on the one hand the labyrinth seal and on the other hand the piston ring seal, the sealing air pressure being greater than the exhaust gas pressure at the labyrinth seal. In this way, the formation of the exhaust gas blow-by flow can be counteracted particularly effectively.
    Preferred developments of the invention result from the dependent claims and the following description. Exemplary embodiments of the invention are explained in more detail with reference to the drawing, without being limited thereto. 1 shows an axial section through a detail of a turbo compressor of an exhaust gas recirculation of an internal combustion engine according to the prior art, FIG. 2 shows an axial section through a detail of a turbo compressor according to the invention of an exhaust gas recirculation of an internal combustion engine.
    The invention relates to a turbo compressor of an exhaust gas recirculation of an internal combustion engine. The turbo compressor is used to extract, compress and convey exhaust gas, starting from the exhaust tract of an internal combustion engine in the direction of a charge air tract of the same.
    Fig. 2 shows a section of a turbo compressor according to the invention in the region of a compressor housing 20 of the compressor rotor 21 and a shaft 22 which is connected to the compressor rotor 21 and mounted in the compressor housing 20 via bearings, not shown.
    As usual in the prior art, a piston ring seal 23 is formed between the shaft 22 and the compressor housing 20, which is intended to counteract the formation of an exhaust gas blow-by flow in the direction of the bearing, not shown.
    In terms of the present invention, a labyrinth seal 25 is preferably additionally formed between the compressor rotor 21 and the compressor housing 20 of the turbo compressor of the exhaust gas recirculation. The labyrinth seal 25 can also be formed between the shaft 22 and the compressor housing 20 . Seen in the direction of the exhaust gas blow-by flow, this labyrinth seal 25 is positioned upstream of the piston ring seal 23 . So before exhaust gas flows in the direction of the piston ring seal 23, the same must first overcome the labyrinth seal 25.
    Preferably, a sealing air bore 26 is formed, a gap 27 between the piston ring seal 23 and the labyrinth seal 25 can be supplied via the sealing air. In this gap 27 between the labyrinth seal 25 and the piston ring seal 23 there is a sealing air pressure pSL. With this sealing air pressure pSL, the sealing air acts on the labyrinth seal 25 on the one hand and on the piston ring seal 23 on the other.
    The sealing air pressure pSList is greater than the exhaust gas pressure pAG applied to the labyrinth seal 25 on a side opposite the gap 27 . The sealing air thus prevents an exhaust gas flow via the labyrinth seal 25. At best, a blow-by flow 24 of sealing air flows via the piston ring seal 23.
    In the turbo compressor according to the invention of an exhaust gas recirculation, the labyrinth seal 25 is therefore present in addition to the piston ring seal 23 . Sealing air can be guided between these two seals, i.e. between the piston ring seal 23 and the labyrinth seal 25, which is positioned upstream of the piston ring seal 23 viewed in the direction of flow of an exhaust gas blow-by flow, via the sealing air bore 26. This can effectively prevent it be that exhaust gas towards bearings of the shaft 22 passes.
    Downstream of the piston ring seal 23, a further labyrinth seal 28 is formed between the shaft 22 and the compressor housing 20 as shown in FIG. This is to prevent the sealing air from reaching the bearings of the shaft 22 and thus being introduced into the lubricating oil for the bearings.
    reference list
    10 compressor housing 11 compressor rotor 12 shaft 13 piston ring seal 14 exhaust gas blow-by flow 20 compressor housing 21 compressor rotor 22 shaft 23 piston ring seal 24 blow-by flow 25 labyrinth seal 26 sealing air hole 27 gap 28 labyrinth seal
    权利要求:
    Claims (7)
    [1]
    1. Turbo compressor of an exhaust gas recirculation of an internal combustion engine,with a compressor housing (20),with a compressor rotor (21),with a shaft (22) which is coupled to the compressor rotor (21) and is mounted in the compressor housing (20),with a piston ring seal (23) to prevent an exhaust gas blow-by flow in the direction of the bearing,marked bya labyrinth seal (25) positioned upstream of the piston ring seal (23) as viewed in the direction of exhaust gas blow-by flow.
    [2]
    2. Turbo compressor according to claim 1, characterized by a sealing air bore (26) via which sealing air can be guided in the direction of a gap (27) formed between the piston ring seal (23) and the labyrinth seal (25).
    [3]
    3. Turbo compressor according to claim 2, characterized in that the sealing air with a defined sealing air pressure acts on the one hand the labyrinth seal (25) and on the other hand the piston ring seal (23).
    [4]
    4. Turbo compressor according to claim 3, characterized in that the sealing air pressure is greater than the exhaust gas pressure at the labyrinth seal (25),
    [5]
    5. Turbo compressor according to claim 4, characterized in that the sealing air pressure is 5% to 15%, preferably 8% to 12%, greater than the exhaust gas pressure at the labyrinth seal (25).
    [6]
    6. Turbo compressor according to one of claims 1 to 5, characterized in that the piston ring seal (23) is formed between the compressor housing (20) and the compressor rotor (21) or between the compressor housing (20) and the shaft (22).
    [7]
    7. Turbo compressor according to one of claims 1 to 7, characterized in that the labyrinth seal (25) is formed between the compressor housing (20) and the compressor rotor (21) or between the compressor housing (20) and the shaft (22).
    类似技术:
    公开号 | 公开日 | 专利标题
    EP1394365B1|2006-10-25|Turbocharger shaft sealing
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    DE2416639A1|1974-10-17|ROTATING MOUNTING ARRANGEMENT
    DE2441520A1|1975-03-06|SHAFT SEAL FOR SCREW ROTOR COMPRESSOR
    DE102009040196A1|2010-03-11|Exhaust gas turbocharger for internal combustion engine, particularly for use in motor vehicle, has turbine wheel and compressor wheel bearing shaft, where hub shelf is formed in hub of shaft
    DE102013201771A1|2014-08-07|Compressor of exhaust gas turbocharger mounted in internal combustion engine, forms with passage gap having passage gap inlet opening and passage gap outlet opening that are fluid connected with inlet and outlet channels of compressor
    CH714849B1|2022-02-15|turbo compressor.
    DE2733377A1|1978-02-02|LUBRICATION SYSTEM FOR A BEARING ARRANGEMENT IN A TURBINE WITH FUEL SUPPLY
    DE112013003878T5|2015-05-21|Turbocharger shaft seal
    CH714852B1|2022-01-31|turbo compressor.
    DE102004009412B4|2009-04-09|turbocharger
    DE2437530A1|1976-02-12|Exhaust gas driven compressor - shaft bearing lubricant leakage is prevented by exhaust gas pressure
    DE10134068A1|2003-01-30|Internal combustion engine, in particular for motor vehicles
    DE102013201763A1|2014-08-07|Compressor of exhaust gas turbocharger for internal combustion engine, has a projection which is engaged in a corresponding complementary groove formed on compressor housing or compressor wheel, such that a labyrinth seal is formed
    DE112008002164B4|2017-02-02|Vacuum pump, in particular vane pump
    DE102009052225B4|2019-08-14|Gas seal between a shaft and a housing
    DE19745659C1|1999-05-06|Turbo-supercharger for internal combustion engine
    DE102018217602A1|2020-04-16|Exhaust gas turbine of an exhaust gas turbocharger with a sealed wastegate valve device and exhaust gas turbocharger
    DE102018222511A1|2020-06-25|Internal combustion engine
    DE102019104032A1|2019-04-11|Internal combustion engine with crankshaft and roller bearings
    DE102014008514A1|2015-12-17|Exhaust system for an internal combustion engine of a motor vehicle
    DE102004035251B4|2006-06-14|Radical Piston Pump
    同族专利:
    公开号 | 公开日
    JP2019167956A|2019-10-03|
    US10920718B2|2021-02-16|
    DE102018106900A1|2019-09-26|
    RU2019108047A|2020-09-22|
    CN110296100A|2019-10-01|
    CH714849A2|2019-09-30|
    US20190338732A1|2019-11-07|
    KR20190111794A|2019-10-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3477385A|1968-01-19|1969-11-11|Dempster Ind Inc|Centrifugal pump sealing system for viscous abrasive liquids|
    DE4313455A1|1993-04-24|1994-10-27|Klein Schanzlin & Becker Ag|Radial gap, for example a turbomachine|
    US5927720A|1997-11-03|1999-07-27|Carrier Corporation|Two-piece labyrinth seal for a centrifugal compressor balance piston|
    SE521713C2|1998-11-09|2003-12-02|Stt Emtec Ab|Procedure and apparatus for an EGR system, and such valve|
    WO2004063535A1|2003-01-10|2004-07-29|Honeywell International Inc.|Sealing means for a lubrication system in a turbocharger|
    DE102004055429B3|2004-11-17|2006-08-10|Man B & W Diesel Ag|Sealing device for a particularly lubricated at standstill bearing a rotor shaft|
    DE202005020100U1|2005-12-23|2006-02-23|Assoma Inc., Lujhu|Centrifugal pump has gasket and labyrinth gasket arranged between motor shaft and housing|
    CN104956046B|2012-12-17|2017-12-19|博格华纳公司|Sweeping type seals on the outside of turbocharger|
    WO2015013114A1|2013-07-26|2015-01-29|Borgwarner Inc.|Turbocharger purge seal including axisymmetric supply cavity|DE102018106944A1|2018-03-23|2019-09-26|Man Energy Solutions Se|Turbo compressor|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102018106900.6A|DE102018106900A1|2018-03-22|2018-03-22|Turbo compressor|
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