• 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:
    Turbocharger (14) with a turbine for expanding a first medium, with a compressor for compressing a second medium using energy obtained in the turbine when the first medium is expanded, a turbine housing (16) of the turbine and a compressor housing of the compressor each with a bearing housing (17) arranged between the same, with a casing (18) which surrounds the turbine casing (16) radially on the outside and axially on the outside at least in sections, and / or with a casing (18) which surrounds the compressor casing radially on the outside and surrounds axially outside at least in sections. The respective casing (18) is loosely positioned around the turbine casing (16) without a direct connection to the turbine housing (16) or loosely around the compressor casing without a direct connection to the compressor casing, the respective casing (18) being connected to an assembly which has a temperature level corresponding to the respective casing (18) during operation of the turbocharger.
    公开号:CH715845A2
    申请号:CH00079/20
    申请日:2020-01-23
    公开日:2020-08-14
    发明作者:Braun Steffen；Spatz Urban；Albrecht Daniel；Denkel Harald；Weihard Stefan；Haas Bernd；Niebuhr Johannes
    申请人:Man Energy Solutions Se；
    IPC主号:
    专利说明:

    The invention relates to a turbocharger with a casing and an internal combustion engine.
    The basic structure of a turbocharger is known to the person skilled in the art addressed here. A turbocharger has a turbine in which a first medium is expanded. Furthermore, a turbocharger has a compressor in which a second medium is compressed using the energy obtained in the turbine when the first medium is expanded. The turbine of the turbocharger has a turbine housing and a turbine rotor. The compressor of the turbocharger has a compressor housing and a compressor rotor. A bearing housing is positioned between the turbine housing of the turbine and the compressor housing of the compressor, the bearing housing being connected on the one hand to the turbine housing and on the other hand to the compressor housing. A shaft via which the turbine rotor is coupled to the compressor rotor is mounted in the bearing housing.
    When a turbocharger is in operation, there is a risk that a rotor, for example the turbine rotor, of the turbocharger will break and fragments of the rotor will break through the corresponding housing, that is to say the turbine housing. There is then the risk that the fragments of the turbocharger will get into the environment. In order to take account of this problem of the bursting of a rotor of the turbocharger, the respective housing in turbochargers known from practice is designed in such a way that damage to the respective housing is not to be expected and fragments of the respective rotor do not penetrate the respective housing even if the respective rotor breaks can. However, this increases the weight of the turbocharger.
    In order not to increase the weight of the turbocharger unnecessarily and also to protect turbochargers already used in the field from breaking through of fragments of a rotor in the environment, it is already known from practice to equip a turbocharger with a casing which surrounds the respective housing to be encased, ie the turbine housing or compressor housing, of the turbocharger radially on the outside and axially on the outside at least in sections.
    In turbochargers known from practice, the casing for the turbine is directly connected to the turbine housing and the casing for the compressor is directly connected to the compressor housing. Because of a temperature difference that develops during operation between the casing and the turbine housing or between the casing and the compressor casing, the corresponding connecting elements must meet several requirements. Sufficient resilience of the connecting elements is required to compensate for thermally induced relative movements between the casing and the housing, which is at least partially surrounded by the casing, without inadmissibly high constraining forces arising from expansion conditions. At the same time, however, a sufficiently rigid connection is required in order to provide high natural frequencies and to avoid vibration excitation of the casing. For this reason, complex and expensive connecting elements are used in turbochargers known from practice. This is a disadvantage. There is a need for a turbocharger in which a casing for the turbine housing and / or a casing for the compressor housing can be assembled using simple and inexpensive connecting elements.
    Based on this, the invention is based on the object of creating a new type of turbocharger and an internal combustion engine with such a turbocharger.
    [0007] This object is achieved by a turbocharger according to claim 1. According to the invention, the respective casing is loosely positioned around the turbine casing without a direct connection to the turbine casing or loosely around the compressor casing without a direct connection to the compressor casing. The respective casing is connected to an assembly which, when the turbocharger is in operation, has a temperature level that corresponds to the respective casing. The present invention proposes that the respective casing is loosely positioned around the respective housing, that is to say around the turbine housing or the compressor housing, without a direct connection to the respective housing. Rather, the respective casing is connected to an assembly which, when the turbocharger is in operation, has a temperature level corresponding to the respective casing. This means that it is not necessary for the connecting elements, which are used to assemble the respective casing, to have to compensate for temperature-related relative movements. They can be made rigid in order to provide a sufficiently high natural frequency. The connecting elements can be made simpler and cheaper.
    According to an advantageous development, the respective casing is connected to the bearing housing. The connection of the respective casing to the bearing housing is preferred. This allows the respective casing to be easily connected to the turbocharger.
    Preferably, the respective casing is connected to the bearing housing via holders, preferably in such a way that the holders are connected at one end to the bearing housing and are connected to the respective casing at a second end, with elongated holes being formed at the second ends of the holder that allow a connection of the respective casing in different angular positions. This ensures that the respective casing, if necessary together with the housing to be cased, can be mounted on the bearing housing in different relative positions relative to the same.
    The internal combustion engine according to the invention is defined in claim 8.
    The respective casing can additionally or alternatively be connected to the connection to the bearing housing with the motor and / or a support structure or console for assemblies of the internal combustion engine. The respective casing can therefore also be connected to the engine or to the supporting structure or bracket. In this case, too, there is no direct connection of the respective casing to the casing to be cased, that is to say to the turbine casing or to the compressor casing.
    [0012] Preferred developments of the invention emerge from the subclaims and the following description. Embodiments of the invention are explained in more detail with reference to the drawing, without being restricted thereto. It shows:<tb> Fig. 1 <SEP> a side view of an internal combustion engine together with a generator,<tb> Fig. 2 <SEP> a casing for a turbocharger of the internal combustion engine without the casing of the turbocharger to be covered,<tb> Fig. 3 <SEP> a section from a turbocharger in the area of a bearing housing, a turbine housing and a casing of the turbine housing.
    Fig. 1 shows a side view of an internal combustion engine 10 together with a generator 11 driven by the internal combustion engine 10. It should already be pointed out at this point that the internal combustion engine 10 of FIG. 1 is purely exemplary in nature. The invention is not restricted to internal combustion engines 10 which are used to drive a generator 11.
    The internal combustion engine 10 has an actual engine 12 with a plurality of cylinders 13. In the cylinders 13 of the engine 10, a fuel is burned. This fuel can be a liquid fuel or a gaseous fuel. The engine 12 can be, for example, a gas engine, a diesel engine, or also a dual-fuel engine.
    The internal combustion engine 10 has a turbocharger 14. The turbocharger 14 is mounted in Fig. 1 on a support structure 15, which is also referred to as a console.
    The basic structure of a turbocharger 14 is familiar to the person skilled in the art addressed here. For example, a turbocharger 14 comprises a turbine for expanding a first medium, in particular for expanding the exhaust gas that occurs when the fuel is burned in the cylinders 13 of the engine 12. The turbocharger 14 further comprises a compressor for compressing a second medium, in particular for compressing charge air which is provided to the cylinders 13 of the engine 12 for the combustion of the fuel.
    The turbine of the turbocharger 14 has a turbine rotor and a turbine housing. The compressor of the turbocharger 14 has a compressor rotor and a compressor housing. The turbine rotor and compressor rotor are coupled via a shaft. The shaft is mounted on a bearing housing of the turbocharger, the bearing housing being positioned between the turbine housing and the compressor housing and being connected to both the turbine housing and the compressor housing.
    FIG. 3 shows a detail from a turbocharger 14 in the area of a turbine housing 16 and a bearing housing 17.
    During operation, there is basically the risk that the turbine rotor of the turbine of the turbocharger 14 or the compressor rotor of the compressor of the turbocharger 14 will break. Here, fragments of the respective rotor can penetrate the respective housing, that is to say the turbine housing or the compressor housing, and get into the environment. This must be avoided, for which it is known in principle to equip a turbocharger with at least one casing. Thus, FIG. 3 shows a casing 18 for the turbine of the turbocharger, which surrounds the turbine housing 16 axially and radially on the outside in sections.
    Such casings are preferably used both in the area of the turbine and in the area of the compressor, which surround the respective housing, that is to say the turbine housing 16 or the compressor housing, radially on the outside and axially on the outside, at least in sections.
    For the purposes of the present invention, it is proposed that the respective casing is positioned loosely without a direct connection to the respective housing to be covered around the respective housing to be covered. In FIG. 3, the casing 18 shown there is loosely positioned around the turbine housing 16 without a direct connection to the turbine housing 16. In the area of the compressor, such a casing is loosely positioned around the compressor housing around the compressor housing.
    According to the invention, the respective casing 18 is connected to an assembly which, during operation of the turbocharger 14, has a temperature level corresponding to the casing 18. Thus in FIG. 3 the casing 18, which is arranged around the turbine housing 16 without a direct connection to the turbine housing 16, is connected to the bearing housing 17. For this purpose, a plurality of holders 19 are used in FIG. 3, which are connected to the bearing housing 17 at a first end 19a and to the casing 18 for the turbine housing 16 at an opposite second end 19b.
    It is therefore within the meaning of the present invention not to connect a casing 18 of a turbocharger 14 to the casing to be cased, but rather to an assembly which has a temperature level corresponding to the casing 18 during operation of the turbocharger 14.
    In the embodiment of FIG. 3, in which the casing 18 of the turbine housing 16 is not connected to the turbine housing 16 but to the bearing housing 17, the holders 19 are used to connect the casing 18 to the bearing housing 17. The holders 19 are bent contoured. The holders 19 are connected, in particular screwed, to the bearing housing 17 at their first end 19a. At their opposite, second end 19b, the holders 19 are connected to the casing 18 of the turbine 14, in particular screwed.
    According to FIG. 3, elongated holes 20 are formed at the second ends 19b of the curved holder 19, which extend into the threaded hole of the casing 18 for screwing the holder 19 to the casing 18 screws. These elongated holes 20 allow a connection of the casing 18 in different angular positions on the bearing housing 17 in order to enable different mounting positions of the turbine housing. The second ends 19b of the curved holder 19, on which the elongated holes 20 are formed, are contoured like a segment of a circle. A plurality of holders 19 can form a common segment-like contoured section with elongated holes 20 at their second ends 19b or end in such a common segment-like segment.
    FIG. 2 shows a perspective view of a further casing 18. In the exemplary embodiment in FIG. 2 it is provided that the casing 18 is fastened to the bearing housing 17 via the holder 19. The casing 18 can also be mounted on the support structure 15 of the internal combustion engine 10 for the turbocharger 14 via a further holder 21.
    Although not shown, it is also possible that the casing 18 is also connected to the engine 12, depending on the installation situation of the turbocharger 14 on the engine 12.
    The invention does not require that connecting elements that are used to assemble the casing 18, have to compensate for thermally induced relative movements between the casing 18 and the housing to be covered. The connecting elements can therefore be made stiff, in particular with a view to ensuring a high natural frequency of the casing 18. Simple and inexpensive holders can therefore be used.
    The inventive assembly of a casing can be used in the area of the turbine and in the area of the compressor. In that case, the casing is not mounted directly on the casing to be cased, but rather on an assembly which, when the turbocharger is in operation, has a temperature level corresponding to the casing.
    List of reference symbols
    10 internal combustion engine 11 generator 12 motor 13 cylinder 14 turbocharger 15 support structure 16 turbine housing 17 bearing housing 18 casing 19 holder 19a end 19b end 20 elongated hole 21 holder
    权利要求:
    Claims (10)
    [1]
    1. turbocharger (14),with a turbine for the expansion of a first medium,with a compressor for compressing a second medium using the energy gained in the turbine when the first medium is expanded,a turbine housing (16) of the turbine and a compressor housing of the compressor each being connected to a bearing housing (17) arranged between them,with a casing (18) which surrounds the turbine housing (16) radially on the outside and axially on the outside at least in sections, and / or with a casing (18) which surrounds the compressor housing radially on the outside and axially on the outside at least in sections, characterized in thatthe respective casing (18) is loosely positioned around the turbine casing (16) without a direct connection to the turbine casing (16) or loosely around the compressor casing without a direct connection to the compressor casing,the respective casing (18) is connected to an assembly which, when the turbocharger is in operation, has a temperature level corresponding to the respective casing (18).
    [2]
    2. Turbocharger according to Claim 1, characterized in that the respective casing (18) is connected to an assembly which, during operation of the turbocharger, is exposed to a thermal load corresponding to the respective casing (18).
    [3]
    Turbocharger according to Claim 1 or 2, characterized in that the respective casing (18) is connected to the bearing housing (17).
    [4]
    4. Turbocharger according to Claim 3, characterized in that the respective casing (18) is connected to the bearing housing (17) via curved holders (19).
    [5]
    5. Turbocharger according to claim 4, characterized in that the holders (19) are connected at one end (19a) to the bearing housing (17) and at a second end (19b) to the casing (18), at the second ends (19b) of the holder (19) elongated holes (20) are formed, which allow a connection of the casing (18) in different angular positions.
    [6]
    6. Turbocharger according to claim 5, characterized in that the second ends (19b) of the holders (19) are contoured like a segment of a circle.
    [7]
    7. Turbocharger according to Claim 6, characterized in that the second ends (19b) of a plurality of holders (19) form a common section, contoured in the manner of a segment of a circle, with elongated holes (20).
    [8]
    8. internal combustion engine (10),with an engine (12) having a plurality of cylinders (13) for the combustion of fuel,with a turbocharger (14) for the expansion of exhaust gas which occurs during the combustion of fuel in the cylinders (13), and for the compression of charge air which can be supplied to the cylinders (13) for the combustion of fuel, characterized in thatthe turbocharger (14) is designed according to one of claims 1 to 7.
    [9]
    Internal combustion engine according to Claim 8, characterized in that the respective casing (18) is connected to the engine (12).
    [10]
    10. Internal combustion engine according to claim 8 or 9, characterized bya support structure (15) or bracket for assemblies of the internal combustion engine, the respective casing (18) being connected to the support structure (15) or bracket.
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    同族专利:
    公开号 | 公开日
    JP2020128747A|2020-08-27|
    RU2019141833A|2021-06-17|
    CN111535883A|2020-08-14|
    DE102019102874A1|2020-08-06|
    KR20200097211A|2020-08-18|
    US20200248615A1|2020-08-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3761205A|1972-03-20|1973-09-25|Avco Corp|Easily maintainable gas turbine engine|
    DE102009049841B4|2009-10-14|2015-01-15|Mtu Friedrichshafen Gmbh|Gas turbine engine and internal combustion engine|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102019102874.4A|DE102019102874A1|2019-02-06|2019-02-06|Turbocharger with a casing and internal combustion engine|
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