• 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:
    Shaft sealing system of a turbomachine, for sealing a gap (14) running between a bearing housing interior (15) and a wheel side space (16), which is delimited by a rotor-side component (11) and a stator-side component (10), having a first sealing element (17) , Which, in particular when the rotorseitigem component (11) in the Radseitenraum (16) prevailing pressure greater than a in the Lagergehäuseinnenraum (15) prevailing pressure, a leakage flow from the Radseitenraum (16) in the Lagergehäuseinnenraum (15) counteracts, and a second sealing element (19) which, when a pressure prevailing in the wheel side space (16) is smaller than a pressure prevailing in the bearing housing interior (15), in particular when the rotor-side component (11) is stationary, a leakage flow from the bearing housing interior (15) into the wheel side space ( 16) counteracts.
    公开号:CH709982A2
    申请号:CH00460/15
    申请日:2015-03-31
    公开日:2016-02-15
    发明作者:Holger Jenko；Klaus Bartholomä
    申请人:Man Diesel & Turbo Se；
    IPC主号:
    专利说明:

    The invention relates to a shaft seal system of a turbomachine and an exhaust gas turbocharger.
    Shaft sealing systems in turbomachines such. Exhaust gas turbochargers have the task of sealing a gap extending between a bearing housing interior and a Radseitenraum. In an exhaust gas turbocharger, the respective bearing housing interior is to be sealed against the intake air on the compressor side and against the exhaust gas on the turbine side. For this purpose, known from practice Wellendichtsysteme include a sealing element, which then, when a rotor is running in the Radseitenraum pressure greater than a pressure prevailing in the bearing housing interior pressure counteracts a leakage flow from the Radseitenraum in the Lagergehäuseinnenraum. A residual leakage flow, which can flow from the Radseitenraum in the bearing housing interior, is also referred to as blow-by.
    Especially in large engines can form a vacuum at standstill of a turbine-side rotor and a compressor-side rotor of the exhaust gas turbocharger in the respective Radseitenraum relative to the respective Lagergehäuseinnenraum, so then the risk that at standstill despite existing sealing element leakage from the Lagergehäuseinnenraum in the Radseitenraum flows. In particular, when oil is used for aftercooling in the region of the compressor or the turbine, this leakage flow at standstill can cause oil in the region of Radseitenraums passes, which then leads to coking of the oil in the region of the Radseitenraums due to the high component temperatures , Such oil coking is hard and lead to damage to the impeller of each rotor.
    From DE 10 2004 055 429 B3 a shaft seal system for an exhaust gas turbocharger is known which comprises an annular sealing ridge which is provided in an oil drain passage and is positioned between seals.
    On this basis, the present invention has the object to provide a novel shaft seal system of a turbomachine. This object is achieved by a shaft seal system according to claim 1. According to the invention, the shaft seal system comprises a second sealing element which, when a pressure prevailing in the wheel side space is smaller than a pressure prevailing in the bearing housing interior, especially when the rotor-side component is stationary, counteracts a leakage flow from the bearing housing interior into the wheel side space.
    In the inventive shaft seal system there is no danger that, if in the respective Radseitenraum a negative pressure prevails relative to the respective Lagergehäuseinnenraum, a leakage flow from the bearing housing interior flows into the Radseitenraum. The second sealing element provided according to the invention counteracts this leakage flow. A risk of coking in Radseitenraum can thus be effectively counteracted.
    According to an advantageous embodiment, the second sealing element is formed as a membrane-like sealing element which is attached to the stator-side component such that the same when the pressure prevailing in the Radseitenraum pressure is less than the pressure prevailing in the bearing housing interior, sealing to a flat surface of the rotor-side component is applied, and which, when the ruling in the Radseitenraum pressure is greater than the pressure prevailing in the bearing housing interior pressure, is lifted from the flat surface of the rotor-side member while allowing a blow-by from Radseitenraum in the bearing housing interior.
    The use of such a membrane-like sealing element can with simple means at an overpressure in Radseitenraum relative to the bearing housing interior to the so-called blow-by from Radseitenraum in the bearing housing interior. On the other hand, if there is a negative pressure in the wheel side space relative to the bearing housing interior, a leakage flow from the bearing housing interior into the wheel side space is effectively prevented.
    Preferably, the membrane-like sealing element with a first, radially outer portion is fixed to a bearing housing interior facing flat surface of the stator-side component, wherein the membrane-like sealing element with a second, radially inner portion then when the pressure prevailing in the Radseitenraum smaller than in the Lagergehäuseinnenraum The prevailing pressure is, on the flat surface of the rotor-side component, which faces the bearing housing interior, sealingly. This embodiment of the membrane-like sealing element is particularly simple and preferred.
    According to an advantageous embodiment, the flat surface of the rotor-side member to which the membrane-like sealing element when the pressure prevailing in the Radseitenraum smaller than the pressure prevailing in the bearing housing interior pressure is applied, limited by a paragraph on the rotor-side component, which then the membrane-like sealing element rests against the plane surface of the rotor-side component, with a radially inner edge of the second sealing element defines a gap. Hereby, the sealing effect of the membrane-like sealing element can be further improved.
    Preferred embodiments of the invention will become apparent from the dependent claims and the description below. Embodiments of the invention will be described, without being limited thereto, with reference to the drawings. Showing:<Tb> FIG. 1: <SEP> is a schematic view of a shaft sealing system according to the invention in a first state; and<Tb> FIG. 2: <SEP> is a schematic view of the shaft sealing system according to the invention in a second state.
    The present invention relates to a shaft seal system of a turbomachine, in particular an exhaust gas turbocharger, and an exhaust gas turbocharger with such a shaft seal system.
    The basic structure of an exhaust gas turbocharger is known to the expert mentioned here. Thus, an exhaust gas turbocharger has a turbine and a compressor, wherein in the turbine exhaust gas of an internal combustion engine is expanded to recover energy. The energy obtained in the region of the turbine in the exhaust gas relaxation can be used in the region of the compressor to compress the charge air to be supplied to the internal combustion engine.
    The turbine of an exhaust gas turbocharger has a turbine rotor and a turbine housing, wherein the compressor has a compressor rotor and a compressor housing. Both in the area of the turbine and in the region of the compressor, a so-called bearing housing interior and a wheel side space are formed, wherein a gap extends between the bearing housing interior and the wheel side space, on the one hand, namely radially outside, from the respective stator-side housing and on the other hand, namely radially inward, is limited by the respective rotor.
    Fig. 1 and 2 show a highly schematic of a section of an exhaust gas turbocharger in the region of a turbine, in Fig. 1, on the one hand as a stator-side member 10, the turbine housing and on the other hand shown as a rotor-side member 11 of the turbine rotor. The turbine rotor 11 comprises a shaft 12 and rotor blades 13.
    According to FIGS. 1 and 2, a gap 14 is formed between the stator-side component 10 and the rotor-side component 11, which gap extends between a bearing housing interior 15 and a wheel side space 16.
    To seal this gap 14, a first sealing element 17 is present, which is formed in the embodiment shown as a piston ring seal. This first, formed in the embodiment shown as a piston ring seal, sealing element 17 is shown in FIG. 1 and 2 arranged in a groove 18 of the rotor-side member 11 and seals the gap 14 relative to the stator-side member 10. Such a preferably designed as a piston ring, first sealing element 17 is particularly effective for sealing the gap 14, especially when the rotorseitigem component 11 whose speed is n> 0, in the Radseitenraum 16 relative to the bearing housing interior 15, a greater pressure prevails, but this first sealing element 17 a residual leakage flow, which is also referred to as blow-by, starting from the wheel side 16 in the bearing housing interior 15 permits.
    To then, especially when stationary rotorseitigem component 11 (n = 0) in the bearing housing interior 15, a greater pressure prevails than in the Radseitenraum 16, a leakage flow from the bearing housing interior 15 in the Radseitenraum 16 with simple means safe and reliable to prevent that includes This second sealing element 19 prevents when the ruling in Radseitenraum 16 pressure is less than the pressure prevailing in the bearing housing 15, a leakage flow from the bearing housing interior 15 in the Radseitenraum 16. There is no risk that at a Vacuum in the Radseitenraum 16 relative to the bearing housing interior 15, for example, oil used for cooling in the region of the Radseitenraums 16 passes and cookes there.
    In the second sealing element 19 is preferably a membrane-like sealing element. This membrane-like sealing element 19, which can also be referred to as a sealing membrane, is fastened to the stator-side component 10 in such a way that, when the pressure prevailing in the wheel side chamber 16 is smaller than the pressure prevailing in the bearing housing interior 15, on a plane surface 20 of the rotor-side component 11 sealingly abuts (see Fig. 2), whereas the membrane-like sealing element 19 when the pressure prevailing in the Radseitenraum 16 is greater than the pressure prevailing in the bearing housing interior 15 pressure is lifted from the planar surface 20 of the rotor-side member 11 and so allows the blow-by (see Fig. 1).
    In the illustrated, preferred embodiment, the second, membrane-like sealing element 19 with a first, radially outer portion 21 on a bearing housing interior 15 facing planar surface 22 of the stator-side member 10 is attached. Then, when the prevailing pressure in the Radseitenraum 16 is smaller than the pressure prevailing in the bearing housing 15, the membrane-like sealing element with a second radially inner portion 23 on the flat surface 20 of the rotor-side member 11, which also faces the bearing housing interior 15, sealingly. On the other hand, if the pressure prevailing in the wheel side chamber 16 is greater than the pressure prevailing in the bearing housing interior 15, this second, radially inner section 23 of the membrane-like, second sealing element 19 is lifted off the planar surface 20 of the rotor-side component 11.
    The planar surface 22 of the stator-side component 10, to which the first, radially outer portion 21 of the membrane-like sealing element 19 is attached, according to FIGS. 1 and 2 arranged at the same axial position, as the flat surface 20 of the rotor-side member 11 at which at negative pressure in the Radseitenraum 16, the second, radially inner portion 23 of the membrane-like sealing element 19 abuts. In this case, the planar surface 22 of the stator-side component 10 is arranged radially outside the planar surface 20 of the stator-side component 11.
    In the illustrated, preferred embodiment, the flat surface 20 of the rotor-side member 11 to which the membrane-like sealing element 19 is applied when in the Radseitenraum 16 relative to the bearing housing interior 15, a negative pressure, limited by a shoulder 24 on the rotor-side member 11.
    Then, when the second, radially inner portion 23 of the membrane-like sealing member 19 abuts against the flat surface 20 of the rotor-side member 11, defines a radially inner edge 25 of the membrane-like sealing member 19 with this paragraph 24 a gap, thereby, the sealing effect of the shaft sealing system be further improved at negative pressure in the Radseitenraum 16 relative to the bearing housing interior 15.
    The membrane-like sealing element 19 may consist of a plastic or metal, the material must be designed only for the prevailing temperatures in the region of the shaft seal system. The thickness of the membrane-like sealing element 19 is dimensioned such that it is adapted to pressure differences between the bearing housing interior 15 and the Radseitenraum 16 to seal the gap 14 when a negative pressure prevails in the Radseitenraum 16 relative to the bearing housing interior 15 and at a positive pressure prevailing in Radseitenraum sixteenth relative to the bearing housing interior 15 to allow the blow-by. The blow-by from Radseitenraum 16 in the bearing housing interior 15 is therefore not hindered by the second sealing element 19, only an opposite leakage flow from the bearing housing interior 15 in the Radseitenraum 16 is prevented.
    The shaft sealing system according to the invention can be used both in the region of the turbine of the exhaust gas turbocharger and in the region of the compressor of the exhaust gas turbocharger. Furthermore, the shaft sealing system can also be used in other turbomachines, such as so-called power turbines.
    LIST OF REFERENCE NUMBERS
    [0026]<Tb> 10 <September> component<Tb> 11 <September> component<Tb> 12 <September> wave<Tb> 13 <September> Wheels<Tb> 14 <September> gap<Tb> 15 <September> Bearing housing interior<Tb> 16 <September> wheel side<Tb> 17 <September> sealing element<Tb> 18 <September> Nut<Tb> 19 <September> sealing element<Tb> 20 <September> plane surface<Tb> 21 <September> section<Tb> 22 <September> section<Tb> 23 <September> plane surface<Tb> 24 <September> Paragraph<Tb> 25 <September> Rand
    权利要求:
    Claims (10)
    [1]
    A shaft seal system of a turbomachine, for sealing a gap (14) extending between a bearing housing interior (15) and a wheel side space (16), which is delimited by a rotor-side component (11) and a stator-side component (10), having a first sealing element ( 17), which, in particular when the rotor-side component (11) is in the Radseitenraum (16) prevailing pressure greater than a in the Lagergehäuseinnenraum (15) prevailing pressure counteracts a leakage flow from Radseitenraum (16) in the Lagergehäuseinnenraum (15) characterized by a second sealing element (19), which, if in particular at a stationary rotorseitigem component (11) in the Radseitenraum (16) prevailing pressure is less than a in the Lagergehäuseinnenraum (15) prevailing pressure, a leakage flow from the bearing housing interior (15) in the Radseitenraum (16) counteracts.
    [2]
    2. A shaft seal system according to claim 1, characterized in that the second sealing element (19) is designed as a membrane-like sealing element which is fastened to the stator-side member (10) such that the same when the prevailing in the Radseitenraum (16) pressure is smaller than that in the bearing housing interior (15) prevailing pressure, on a plane surface (20) of the rotor-side member (11) sealingly abuts, and which, when the ruling in the Radseitenraum (16) pressure is greater than the pressure prevailing in the Lagergehäuseinnenraum (15) pressure of the plane surface (20) of the rotor-side component (11) is lifted off.
    [3]
    3. Shaft sealing system according to claim 2, characterized in that the membrane-like sealing element (19) with a first, radially outer portion (21) on a bearing housing interior (15) facing planar surface (22) of the stator-side component (10) is attached.
    [4]
    4. A shaft seal system according to claim 2 or 3, characterized in that the membrane-like sealing element (19) with a second, radially inner portion (23) when the pressure in the Radseitenraum (16) prevailing pressure smaller than the in the Lagergehäuseinnenraum (15) prevailing pressure is, on the flat surface (20) of the rotor-side member (11), which faces the bearing housing interior (15) sealingly abuts.
    [5]
    5. shaft seal system according to claim 4, characterized in that the membrane-like sealing element (19) with the second, radially inner portion (23) when the ruling in the Radseitenraum (16) pressure is greater than the pressure prevailing in the Lagergehäuseinnenraum (15) pressure, from the plane surface (20) of the rotor-side component (11), which faces the bearing housing interior (15), is lifted off the wheel side space (16) into the bearing housing interior (15) while allowing a blow-by.
    [6]
    6. shaft seal system according to one of claims 2 to 5, characterized in that the flat surface (20) of the rotor-side member (11) on which the membrane-like sealing element (19) when the prevailing in Radseitenraum (16) pressure is smaller than that in Lagergehäuseinnenraum (15) is prevailing pressure, is applied, by a shoulder (24) on the rotor-side member (11) is limited.
    [7]
    7. shaft seal system according to claim 6, characterized in that the shoulder (24), when the membrane-like sealing element (19) on the planar surface (20) of the rotor-side member (11) is present, with a radially inner edge (25) of the second sealing element (19) defines a gap.
    [8]
    8. Shaft seal system according to one of claims 1 to 7, characterized in that the membrane-like sealing element (19) consists of plastic or metal and is adapted in its thickness to pressure differences between the bearing housing interior (15) and the Radseitenraum (16).
    [9]
    9. shaft seal system according to one of claims 1 to 8, characterized in that the first sealing element (17) is designed as a piston ring seal or as a brush seal or as a labyrinth seal.
    [10]
    10. Exhaust gas turbocharger, comprising a turbine and a compressor, wherein the turbine comprises a turbine rotor and a turbine housing, wherein the compressor has a compressor rotor and a compressor housing, and wherein both in the region of the turbine and in the region of the compressor from the respective rotor and A respective housing is a gap bounded between a corresponding bearing housing interior and a corresponding Radseitenraum and which is sealed by a shaft seal system, characterized in that the shaft seal system of the turbine and / or the shaft seal system of the compressor according to one of claims 1 to 9 is formed.
    类似技术:
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    DE102017208117A1|2018-11-15|turbocharger
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    同族专利:
    公开号 | 公开日
    CH709982B1|2019-02-28|
    KR20160018355A|2016-02-17|
    JP2016037960A|2016-03-22|
    CN105370325B|2018-05-08|
    DE102014011849A1|2016-02-11|
    CN105370325A|2016-03-02|
    JP6896361B2|2021-06-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CN112377411A|2020-11-12|2021-02-19|湖北同方高科泵业有限公司|Liquid ring type corrosion-resistant plastic vacuum pump|
    CN112377412A|2020-11-12|2021-02-19|湖北同方高科泵业有限公司|Liquid ring vacuum pump shaft seal structure|CH266731A|1948-08-11|1950-02-15|Siegfried Keller & Co|Device to avoid loss of lubricant in high-speed turbo machines with a flying rotor arrangement.|
    US2646210A|1951-05-05|1953-07-21|Eberspaecher J|Turbocompressor|
    JPH0447387Y2|1986-09-03|1992-11-09|
    JPH0395032U|1990-01-19|1991-09-27|
    JP3622371B2|1996-10-15|2005-02-23|株式会社豊田自動織機|Turbocharger device|
    EP1394451B1|2002-09-02|2007-01-24|BorgWarner Inc.|Shaft seal for turbocharger|
    EP1396612A1|2002-09-04|2004-03-10|BorgWarner Inc.|Sealing for a fluid energy machine|
    DE102004055429B3|2004-11-17|2006-08-10|Man B & W Diesel Ag|Sealing device for a particularly lubricated at standstill bearing a rotor shaft|
    DE502007002291D1|2006-08-24|2010-01-21|Abb Turbo Systems Ag|SHAFT SEAL|
    EP2166259A1|2008-09-18|2010-03-24|ABB Turbo Systems AG|Device for sealing a storage housing of a waste gas turbocharger|
    DE102010003796A1|2010-04-09|2011-10-13|Abb Turbo Systems Ag|shaft seal|
    DE102011051650B4|2011-07-07|2020-04-30|Atlas Copco Energas Gmbh|Turbo machine|
    法律状态:
    2017-09-29| PCAR| Change of the address of the representative|Free format text: NEW ADDRESS: BELLERIVESTRASSE 203 POSTFACH, 8034 ZUERICH (CH) |
    2018-11-30| PFA| Name/firm changed|Owner name: MAN ENERGY SOLUTIONS SE, DE Free format text: FORMER OWNER: MAN DIESEL AND TURBO SE, DE |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102014011849.5A|DE102014011849A1|2014-08-08|2014-08-08|Shaft seal system and turbocharger|
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