• 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:
    The invention relates to an exhaust gas turbocharger (1) with a compressor wheel (2), a turbine (3) and a shaft which rotatably connects the compressor wheel (2) and the turbine (3) to one another, the shaft being used for Absorption of axial forces is mounted, with a one-piece thrust ring (6) being arranged on the shaft, which connects the shaft indirectly to the bearing (5) and for transmitting the axial forces acting on the shaft both in a thrust direction (S) and is formed in the opposite thrust direction (GS) to the thrust direction.
    公开号:CH716949A2
    申请号:CH01380/20
    申请日:2020-10-28
    公开日:2021-06-15
    发明作者:Denkel Harald
    申请人:Man Energy Solutions Se；
    IPC主号:
    专利说明:

    The invention relates to an exhaust gas turbocharger with a compressor wheel, a turbine and a shaft which rotatably connects the compressor wheel and the turbine to one another.
    The storage of an exhaust gas turbocharger is designed to absorb an axial thrust of the rotating components in two directions. The forces are introduced into the bearing housing or the stator by means of a specially provided component, a thrust bearing. Two components, a thrust ring and a counter thrust ring, are required on the rotor of the exhaust gas turbocharger for power transmission, on the one hand to be able to mount the rotor and on the other hand to absorb axial forces in two directions or to direct them into the thrust bearing at the same time. The disadvantage of this arrangement is that the two thrust rings and, as a result, other components as well, have a relatively large radial and axial extension, which means that a lot of installation space is required for the exhaust gas turbocharger. This also means that the cooling and lubrication of the exhaust gas turbocharger is very complex and time-consuming.
    It is therefore the object of the present invention to provide an exhaust gas turbocharger which requires less installation space, has a reduced weight and optimizes the cooling and lubrication of the components.
    This object is achieved by the combination of features according to claim 1.
    According to the invention, an exhaust gas turbocharger with a compressor wheel, a turbine and a shaft which rotatably connects the compressor wheel and the turbine to one another is proposed. The shaft is supported by means of a bearing for absorbing axial forces. Furthermore, a one-piece thrust ring is arranged on the shaft, which indirectly connects the shaft to the bearing and is designed to transmit the axial forces acting on the shaft both in a thrust direction and in the counter-thrust direction opposite to the thrust direction.
    In contrast to the prior art, the axial forces are not introduced into the bearing via two rotor components, but the force is introduced via a one-piece component, the thrust ring, by means of which axial forces are directed into the stator components in the thrust direction and counter-thrust direction. Due to the changed arrangement, the bearing function can be implemented with fewer components and with smaller components in terms of their radial extent. Furthermore, for the smaller radial extension, more installation space is provided for an oil drain and cooling. This improves the cooling effect, since there is more cooling surface in the relevant area behind the compressor wheel and the turbine rotor. In addition, the installation space gained enables the use of more stable cores for the cast bearing housing.
    In an advantageous embodiment it is provided that the thrust ring has a thrust surface for receiving the axial force in the thrust direction, which is applied to the bearing in such a way that axial forces in the direction of the compressor wheel are absorbed by the bearing. In addition, the thrust ring comprises a counter thrust surface for absorbing the axial force in the counter thrust direction, which is applied to the bearing in such a way that axial forces in the direction of the turbine are absorbed by the bearing. Due to this arrangement, the main thrust bearing moves in the direction of the compressor wheel. This increases the rigidity of the shaft because, on the one hand, the shaft shoulder can be shifted further in the direction of the compressor wheel and thus a longer section of the shaft has the large diameter of the shoulder. On the other hand, the number of small parts of the rotor can be reduced and the remaining small parts can be made shorter in the longitudinal extent. There is also the possibility of integrating the wedge surfaces of the bearing, especially with regard to the counter thrust surface of the thrust bearing, into the rotor components or the thrust ring. The wedge surfaces usually wear out, which is why there are additional advantages for a service case, since the wearing parts are arranged on a more cost-effective component of the exhaust gas turbocharger.
    In one embodiment of the invention it is provided that the bearing is formed from a bearing housing and a bearing body of a stator. The advantage of this is that the tightening torque can be better determined due to the smaller number of small rotor parts and a smaller spread is to be applied in the design of the components of the exhaust gas turbocharger.
    Preferably, the exhaust gas turbocharger is designed such that a thrust bearing is integrated into the bearing body, which is in contact with the thrust ring and is designed to absorb axial forces in the direction of the compressor wheel. As a result of the integrated thrust bearing, the bearing housing has a more compact radial extension than the previous combination of a bearing body and a thrust bearing, for example with regard to the connecting elements or a necessary residual wall thickness. This reduces the component weight in the interior of the exhaust gas turbocharger, with increased rigidity.
    Furthermore, an embodiment is favorable in which the thrust ring rests with the counter thrust surface on the bearing housing for absorbing the axial forces in the direction of the turbine. In this way, a counter thrust bearing is integrated into the bearing housing. The function of the counter thrust bearing can be carried out optimally as an additional component on the stator or bearing housing. As an example, a locknut with a thread on an outer diameter and grooves on an inner diameter is conceivable. The grooves can be used for both oil lubrication and dismantling. The wedge profiles of the bearing can also be arranged on a flank of the groove nut.
    In a further advantageous variant, the invention provides that a further component for power transmission is arranged between the thrust ring and the bearing housing. As a result, the wedge surface of the bearing is arranged in the counter-thrust direction on a raceway or an additional housing component. According to the material properties of the component, the further component optimizes the properties of the bearing with regard to a coefficient of friction and wear.
    The exhaust gas turbocharger according to the invention is designed in one embodiment that the thrust ring is arranged non-positively on the shaft and rests with part of the counter thrust surface on a shaft shoulder. In this way, the thrust ring is secured against an axial change in position with respect to the shaft.
    In another embodiment of the present turbocharger it is further provided that the bearing has bores, channels and an oil distributor for supplying the bearing with lubricant. It is advantageous here that the axial bearings and the radial bearings can be supplied with lubricating oil by means of the bores, circumferential channels and the oil distributor.
    In a preferred embodiment of the invention, the cross-sectional area of the bores, channels and / or the oil distributor tapers continuously from the oil distributor on a bearing housing to the bearing body. This keeps the pressure losses in the oil distribution system as low as possible. In addition, the space required for the oil distributor can be reduced by the small radial extent of the bearing body. Furthermore, the length-related pressure losses of the distribution system are reduced by the compact design.
    Other advantageous developments of the invention are characterized in the subclaims or are shown in more detail below together with the description of the preferred embodiment of the invention with reference to the figures. 1 shows a sectional view of an exhaust gas turbocharger with a compressor wheel, a turbine and a shaft which rotatably connects the compressor wheel and the turbine to one another.
    In Figure 1 is a sectional view of an exhaust gas turbocharger 1 with a compressor wheel 2, a turbine 3 and a shaft 4, which connects the compressor wheel 2 and the turbine 3 rotatably with each other. A thrust ring 6, preferably a one-piece thrust ring 6, is arranged on the shaft 4, which indirectly connects the shaft 4 to the bearing 5 and for transmitting the axial forces acting on the shaft 4 both in a thrust direction S and in the opposite direction to the thrust direction Opposite thrust direction GS is formed. The thrust ring 6 is arranged on the shaft 4 as a hollow cylinder and with a force fit. Furthermore, the thrust ring 6 extends outward at an end facing the turbine 3 at a right angle in such a way that the sectional view is L-shaped. As a result of this extension, the thrust ring 6 has a thrust surface 7 and a counter-thrust surface 14. In order to absorb the axial force in the direction of thrust S, the thrust surface 7 rests against the bearing 5 in such a way that axial forces in the direction of the compressor wheel 2 are absorbed by the bearing 5. In contrast, the counter thrust surface 14 for absorbing the axial force in the counter thrust direction GS rests against the bearing 5 in such a way that axial forces in the direction of the turbine 3 are absorbed by the bearing 5. In addition, the thrust ring 6 rests with part of the counter thrust surface 14 on a shaft shoulder 11. The diameter of the shaft 4 from the shaft shoulder 11 in the direction of the turbine 3 has a larger diameter than the diameter of the shaft 4 from the shaft shoulder 11 in the direction of the compressor wheel 2.
    Furthermore, the bearing 5 is formed from a bearing housing 8 and a bearing body 9 of a stator 10 of the exhaust gas turbocharger 1. A thrust bearing is integrated into the bearing body 9, which is in contact with the thrust surface 7 of the thrust ring 6 and is designed to absorb axial forces in the direction of the compressor wheel 2. A region 15 is formed within the bearing housing 8, in which water or oil is provided for the lubrication of the exhaust gas turbocharger. Furthermore, the bearing housing 8 has a recess on which the thrust ring 6 rests with the counter thrust surface 14 for absorbing the axial forces in the direction of the turbine 3. A through opening is arranged at this recess in the bearing housing 8 and is designed to discharge the water or the oil for the lubrication to an oil drain 16.
    Furthermore, the storage includes 5 bores, channels and an oil distributor for supplying the storage 5 with lubricant. The cross-sectional area of the bores, channels and the oil distributor tapers steadily from the oil distributor on the bearing housing 8 to the bearing body 9.
    权利要求:
    Claims (9)
    [1]
    1. Exhaust gas turbocharger (1) with a compressor wheel (2), a turbine (3) and a shaft (4) which rotatably connects the compressor wheel (2) and the turbine (3) to one another, the shaft (4) by means of a bearing (5) is mounted to absorb axial forces, a one-piece thrust ring (6) being arranged on the shaft (4), which connects the shaft (4) indirectly to the bearing (5) and for transmitting the to the shaft (4 ) acting axial forces is formed both in a thrust direction (S) and in the opposite thrust direction (GS) to the thrust direction.
    [2]
    2. The exhaust gas turbocharger (1) according to claim 1, wherein the thrust ring (6) has a thrust surface (7) for receiving the axial force in the thrust direction, which is applied to the bearing (5) in such a way that axial forces in the direction of the compressor wheel (2) of the bearing (5), and a counter thrust surface (14) for absorbing the axial force in the counter thrust direction, which is applied to the bearing (5) in such a way that axial forces in the direction of the turbine (3) are absorbed by the bearing (5) , having.
    [3]
    3. The exhaust gas turbocharger (1) according to claim 1 or 2, wherein the bearing (5) is formed from a bearing housing (8) and a bearing body (9) of a stator (10).
    [4]
    4. The exhaust gas turbocharger (1) according to claim 3, wherein a thrust bearing is integrated into the bearing body (9), the thrust bearing being in contact with the thrust surface (7) of the thrust ring (6) and for absorbing axial forces in the direction of the compressor wheel (2 ) is trained.
    [5]
    5. The exhaust gas turbocharger (1) according to claim 3 or 4, wherein the thrust ring (6) rests with the counter thrust surface (14) on the bearing housing (8) to absorb the axial forces in the direction of the turbine (3).
    [6]
    6. exhaust gas turbocharger (1) according to claim 5, wherein a further component for power transmission is arranged between the thrust ring (6) and the bearing housing (8).
    [7]
    7. Exhaust gas turbocharger (1) according to one of the preceding claims, wherein the thrust ring (6) is arranged non-positively on the shaft (4) and rests with part of the counter thrust surface (14) on a shaft shoulder (11).
    [8]
    8. The exhaust gas turbocharger (1) according to one of the preceding claims, wherein the bearing (5) has bores, channels and an oil distributor for supplying the bearing with lubricant.
    [9]
    9. The exhaust gas turbocharger (1) according to claim 9, wherein the cross-sectional area of the bores, channels and / or of the oil distributor tapers continuously from the oil distributor on the bearing housing (8) to the bearing body (9).
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    同族专利:
    公开号 | 公开日
    KR20210075850A|2021-06-23|
    JP2021095907A|2021-06-24|
    US20210254505A1|2021-08-19|
    CN112983650A|2021-06-18|
    DE102019134241A1|2021-06-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4749334A|1984-12-06|1988-06-07|Allied-Signal Aerospace Company|Ceramic rotor-shaft attachment|
    JP3924844B2|1997-05-30|2007-06-06|石川島播磨重工業株式会社|Turbocharger thrust bearing structure|
    JP3718147B2|2001-07-31|2005-11-16|株式会社日立製作所|Turbocharger for internal combustion engines|
    DE102009053102B4|2009-11-13|2013-03-28|Continental Automotive Gmbh|Turbocharger having a thrust bearing arrangement for a shaft of the turbocharger|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102019134241.4A|DE102019134241A1|2019-12-13|2019-12-13|Exhaust gas turbocharger with integration of bearing components|
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