• 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:
    A turbocharger having a turbine for venting a first medium, the turbine having a turbine housing and a turbine rotor (5) with a compressor for compressing a second medium, the compressor having a compressor housing and one coupled to the turbine rotor (5) via a shaft Compressor rotor, wherein the turbine housing and the compressor housing are each connected to a between them arranged bearing housing (9) in which the shaft is mounted, wherein in a connection region between an inlet housing of the turbine housing and the bearing housing (9) has a sealing cover (16) is arranged. At a radially inner portion of the sealing cover (16) is an axially extending projection (21) formed in a bearing housing (9) introduced groove (22) to form a radially inner fitting seat (23) and a radially outer fitting fit ( 24) engages.
    公开号:CH714159A2
    申请号:CH01011/18
    申请日:2018-08-20
    公开日:2019-03-15
    发明作者:Haas Bernd；Rost Stefan；Weihard Stefan
    申请人:Man Energy Solutions Se；
    IPC主号:
    专利说明:

    Description [0001] The invention relates to a turbocharger.
    The basic structure of a turbocharger is known to the expert mentioned here. A turbocharger has a turbine, in which a first medium is expanded. Further, a turbocharger has a compressor in which a second medium is compressed, using the energy obtained in the turbine in the relaxation of the first medium. 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. Between the turbine housing of the turbine and the compressor housing of the compressor, a bearing housing is positioned, wherein the bearing housing is connected on the one hand to the turbine housing and on the other hand to the compressor housing. In the bearing housing, a shaft is mounted, via which the turbine rotor is coupled to the compressor rotor.
    From practice it is known that the turbine housing of the turbine, namely a so-called Zuströmgehäuse, and the bearing housing are connected to each other via a preferably designed as a clamping claw fastening device. Such designed as a clamping claw fastening device is mounted with a first portion thereof on a flange of the turbine housing via fastening means and covered with a second portion of a flange of the bearing housing at least in sections. About such a fastening device of the association or composite of bearing housing and turbine housing is clamped, namely under terminals of a radially outer portion of a sealing cover and nozzle ring between the turbine housing and bearing housing.
    From practice, it is known that a radially inner portion of the sealing cover comes to form a fit fit to a corresponding projection of the bearing housing to the plant. Adjacent to this fit of fit a sealing air bore is preferably introduced into the bearing housing, over which in the direction of the shaft, preferably in the direction of a cooperating with the shaft track ring, sealing air can be performed. The sealing air serves to seal between rotating and stationary components at the interface between the bearing housing and the shaft or between the bearing housing and track ring, in order to avoid an undesirable transfer of, for example, oil and / or combustion particles between the bearing housing and the turbine. The sealing air is taken from the compressor side and passed through a flow channel and the sealing air hole in the direction of the shaft or the track ring.
    In operation, a gap-enlargement can form between the radially inner portion of the sealing cover and the bearing housing, whereby a leakage current of the sealing air is caused. As a result, the blocking air supply is restricted via the sealing air bore in the direction of the shaft or the track ring. This is a disadvantage.
    On this basis, the present invention has the object to provide a novel turbocharger.
    This object is achieved by a turbocharger according to claim 1.
    At a radially inner portion of the sealing lid, an axially extending projection is formed, which engages in an introduced in the bearing housing groove to form a radially inner fitting seat and a radially outer fitting fit.
    Characterized in that the formed on the radially inner portion of the Dichtdeckeis, extending in the axial direction projection engages in the introduced into the bearing housing groove to form two radially spaced fit fits, a leakage flow of the sealing air can be reduced or even completely prevented. At low temperatures, the radial inner fit can take over the sealing effect. If, at higher temperatures during operation, the play increases at the radially inner fit, the radially outer fit automatically closes and assumes the sealing function. Barrier air leakage can be effectively prevented.
    Preferably, in the region of the inner fit fit a cold play is smaller than in the region of the outer fit fit. In the area of the inner fit of fit, an operating clearance is greater than in the area of the outer fit of fit. This also serves the effective prevention of sealing air leakage.
    Between a front surface of the projection of the sealing cover and a groove bottom of the groove of the bearing housing, a first axial gap is formed. Between a front surface of the sealing cover and an end face of the bearing housing, a second axial gap is formed. The radial fit fits and the axial gaps form a labyrinth seal. This makes an even more effective prevention of blocking air leakage possible.
    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:
    1 shows a cross section through a turbocharger,
    Fig. 2 shows a detail of a turbocharger according to the invention.
    The invention relates to a turbocharger.
    Fig. 1 shows the basic structure of a turbocharger 1. A turbocharger 1 has a turbine 2 for relaxing a first medium, in particular for the relaxation of exhaust gas of an internal combustion engine. Furthermore, a turbocharger 1 has a compressor 3 for compressing a second medium, in particular charge air, using energy obtained in the turbine 2 during the expansion of the first medium.
    The turbine 2 has a turbine housing 4 and a turbine rotor 5. The compressor 3 has a compressor housing 6 and a compressor rotor 7. The compressor rotor 7 is coupled to the turbine rotor 5 via a shaft 8 which is mounted in a bearing housing 9 is, wherein the bearing housing 9 is positioned between the turbine housing 4 and the compressor housing 5 and connected to both the turbine housing 4 and the compressor housing 5.
    The turbine housing 4 of the turbine 2 comprises a Zuströmgehäuse 11 and a discharge housing 12. About the Zuströmgehäuse 11 which can be supplied to the turbine rotor 5 in the region of the turbine 2 to relaxing first medium. About the outflow housing 12 flows in the region of the turbine rotor 5 relaxed first medium away from the turbine 2.
    The turbine housing 4 comprises in addition to the Zuströmgehäuse 11 and the outflow housing 12 an insert 13, wherein the insert 13 extends in particular in the region of the Zuströmgehäuses 11, adjacent to the turbine rotor 5 radially outward adjacent to Laufschaufein 14 of the turbine rotor. 5
    The turbine housing 4 further comprises a nozzle ring 15. The nozzle ring 15 is also referred to as Turbinenleitapparat.
    Furthermore, Fig. 1 in the connection region of Zuströmgehäuse 11 and bearing housing 9 a sealing cover 16. The sealing cover 16 is also referred to as a bearing housing cover or heat shield.
    The Zuströmgehäuse 11 of the turbine 2 is connected to the bearing housing 9 via a fastening device 17, which is preferably designed as a clamping claw. In this connection region between the bearing housing 9 and the inlet housing 11 of the turbine, a radially outer portion of the sealing cover 15 is clamped. Preferably, in this connection region and the nozzle ring is clamped with a portion.
    Fig. 2 shows a detail of a turbocharger according to the invention in the connecting region between the bearing housing 9 and turbine, in the region of a radially inner portion of the bearing housing 9 and the sealing cover 16 adjacent to the turbine rotor 5. FIG. 2 shows a sealing air hole 18th , over which sealing air, which is removed from the compressor 3 and guided in the direction of the bearing housing 9, is guided in the direction of a tracking ring 19, which acts via a securing element 20 on the bearing housing 9.
    In the context of the present invention, a projection 21 extending in the axial direction is formed on the radially inner portion of the sealing cover 16. This projection 21 on the radially inner portion of the sealing cover 16 engages in an introduced into the bearing housing 9 groove 22, while forming a radially inner fitting seat 23 and a radially outer fitting fit 24. In the region of the radially inner fit fit 23 is a bearing housing side gap bank of radially inner fit fit 23 further radially inward than a cover-side splitting edge. In the area of the radial outer fitting fit 24, however, a bearing housing-side gap bank of the radially outer fit fit 24 is located further radially outward than a cover-side splitting edge.
    Fig. 2 shows the turbocharger in a cold state, wherein in the region of the radially inner fitting fit 23, a cold play is smaller than in the region of the outer fit fit 24. Then, when heating in operation assemblies of the turbocharger 1, the sealing lid 16 is subject a higher thermal expansion than the bearing housing 9, so that the sealing cover 16 expands more. Here then increases the operating clearance in the region of the radially inner fit fit 23 in comparison to the cold cycle. At the same time, however, an operating clearance is formed in the region of the outer fitting seat 24 which is smaller than the cold play of the inner fit seat 23. Thus, if the radially inner fit seat 23 assumes the sealing function at low temperatures, the radially outer fit fit 24 assumes the sealing function at higher operating temperatures ,
    Fig. 2 it can be seen that between a front surface 27 of the projection 21, which faces a groove bottom 28 of the groove 22, and the groove bottom 28 of the groove 22, a first axial gap 25 is formed. A second axial gap 26, which is offset relative to this axial gap 25 in the axial direction and radial direction, is formed between an end face 29 of the radially inner portion of the sealing cover 16 and a correspondingly facing end face 30 of the bearing housing 9. These two axial gaps 25, 26 form with the two radial fitting seats 23, 24 a labyrinth seal, whereby the sealing function for the sealing air in the region of the radially inner portion of the sealing cover 16 can be further improved.
    Due to the formation of the axial projection 21 at the radially inner end of the sealing cover 16, which engages in a corresponding groove 22 of the bearing housing 9, Axialspalte 25 and 26 and on the other hand radial fit fits 23 and 24 are provided accordingly. When radially inner fitting fit 23, the cold play is less than the radially outer fitting fit 24. The radially outer fitting fit 24, the operating clearance is less than the radially inner fitting fit 23. Thus, it can be ensured that different thermal deformations of sealing cover 16 and bearing housing 9, the sealing function for do not affect the sealing air.
    The design of the games in the area of the fit fits 23, 24 is such that over the entire operating range a good sealing function is ensured for the sealing air. Furthermore, a mechanical overloading of the connection of the groove and projection 21 should be prevented. At low temperatures or when starting up the turbocharger modules are subject to a low temperature-induced strain, in which case the radially inner fit fit 23 assumes the sealing function. At increasingly higher temperatures, the game increases in the region of the radially inner fit fit 23, the game in the area of the outer fit fit 24 is reduced, however, so that then the radially outer fit fit 24 assumes the sealing function.
    DESCRIPTION OF SYMBOLS Turbocharger 2 Turbine 3 Compressor 4 Turbine housing 5 Turbine rotor 6 Compressor housing 7 Compressor rotor 8 Shaft 9 Bearing housing 10 Silencer 11 Inflow housing 12 Outflow housing 13 Insert 14 Blade 15 Nozzle ring 16 Sealing cover 17 Fastening device 18 Sealing air hole 19 Gauge ring 20 Safety element 21 Boss 22 Recess 23 Inner Passungssitz 24 outer fitting fit 25 first axial gap 26 second axial gap 27 end face 28 groove bottom 29 end face
    权利要求:
    Claims (8)
    [1]
    claims
    A turbocharger (1) having a turbine (2) for expanding a first medium, the turbine (2) comprising a turbine housing (4) and a turbine rotor (5) with a compressor (3) for compressing a second medium Use of energy obtained in the turbine (2) upon relaxation of the first medium, the compressor (3) having a compressor housing (6) and a compressor rotor (7) coupled to the turbine rotor (5) via a shaft (8), the Turbine housing (4) and the compressor housing (6) each having a bearing housing (9) arranged between them, in which the shaft (8) is mounted, wherein in a connection region between an inlet housing (11) of the turbine housing (4) and the bearing housing (9) is arranged a sealing cover (16), characterized in that on a radially inner portion of the sealing cover (16) an axially extending projection (21) is formed in a in the bearing housing (9) introduced groove (22) to form a radially inner fitting seat (23) and a radially outer fitting seat (24) engages.
    [2]
    2. Turbocharger according to claim 1, characterized in that formed between an end face (27) of the projection (21) of the sealing cover (16) and a groove bottom (28) of the groove (22) of the bearing housing (9), a first axial gap (25) is.
    [3]
    3. turbocharger according to claim 2, characterized in that between a front face (29) of the sealing cover (16) and an end face (30) of the bearing housing (9), a second axial gap (26) is formed.
    [4]
    4. turbocharger according to claim 3, characterized in that the radial fit seats (23, 24) and the axial gaps (25, 26) form a labyrinth seal.
    [5]
    5. Turbocharger according to one of claims 1 to 4, characterized in that in the region of the inner fit fit (23) a bearing housing side gap bank is located further radially inward than a cover-side gap bank.
    [6]
    6. turbocharger according to one of claims 1 to 5, characterized in that in the region of the outer fit fit (24), a bearing housing side gap bank is further radially outside than a cover-side gap.
    [7]
    7. turbocharger according to one of claims 1 to 6, characterized in that in the region of the inner fit fit (23) a cold play is smaller than in the region of the outer fit fit (24).
    [8]
    8. Turbocharger according to one of claims 1 to 7, characterized in that in the region of the inner fit fit (23) an operating clearance is greater than in the region of the outer fit fit (24).
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    同族专利:
    公开号 | 公开日
    JP2019052641A|2019-04-04|
    CN109505670A|2019-03-22|
    US20190078468A1|2019-03-14|
    KR20190030617A|2019-03-22|
    DE102017121316A1|2019-03-14|
    US10677097B2|2020-06-09|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102017121316.3A|DE102017121316A1|2017-09-14|2017-09-14|turbocharger|
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