• 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 axial bearing (1) for a shaft, in particular an axial turbocharger, with a thrust bearing (3) for the stationary fixing of the axial bearing (1) and a rotatable race (4) for receiving the shaft, which has a radial running surface (5) is received in the thrust bearing (3), the thrust bearing (3) and the race (4) each having an axial sliding surface (31, 41), with a freely rotatable bearing disk (6) between the two axial sliding surfaces (31, 41) is arranged, wherein the bearing washer (6) is rotatably arranged with a radial inner surface (7) on the radial running surface (5) of the raceway (4) and the radial inner surface (7) has at least one axial groove (9) for guiding a lubricant ( 11), and wherein the radial running surface (5) in the area of the bearing disk (6) has at least one further axial groove (10) for guiding the lubricant (11).
    公开号:CH717468A2
    申请号:CH00465/21
    申请日:2021-04-29
    公开日:2021-11-30
    发明作者:Rost Stefan；Rössler Martin；Sauer Denis；Santos Quiroz Salvador
    申请人:Man Energy Solutions Se；
    IPC主号:
    专利说明:

    The invention relates to an axial bearing for a shaft, in particular an axial turbocharger, with a thrust bearing for the stationary fixation of the axial bearing and a rotatable race for receiving the shaft, which is received with a radial running surface in the thrust bearing.
    In axial turbochargers, the axial bearing for receiving high axial thrusts usually consists of a stationary thrust bearing, a freely rotating bearing disk and a raceway that rotates at the rotor speed. The bearing disk is double-acting and has a sliding surface for both the non-rotating thrust bearing and the rotating race. The speed of the bearing disc is set due to the axial friction conditions of the sliding surfaces. The bearing disk rotates on a radial oil film of the race and is therefore radially supported. The disadvantage of this is that this radial bearing tends to be unstable. The oil supply to the bearing side or the sliding surface between the race and the bearing disk takes place through an axial profile in the rotating bearing disk. Due to a high speed difference between the raceway and the bearing washer and a radial speed component, the axial profiling of the bearing washer can become detached and there is a lack of lubrication on the radial running surface or the sliding surface between the race and the bearing washer.
    It is therefore the object of the present invention to provide an axial bearing for a shaft, in particular an axial turbocharger, which improves the lubrication of the sliding surface between the race and the bearing washer.
    This object is achieved by the combination of features according to patent claim 1.
    According to the invention, an axial bearing for a shaft, in particular an axial turbocharger, with a thrust bearing for fixedly fixing the thrust bearing and a rotatable race for receiving the shaft, which is received with a radial running surface in the thrust bearing, is proposed. The thrust bearing and the raceway each have an axial sliding surface and a freely rotatable bearing disk is arranged between the two axial sliding surfaces. Furthermore, the bearing washer is rotatably arranged with a radial inner surface on the radial running surface of the raceway and the radial inner surface comprises at least one axial groove for guiding a lubricant. In addition, the radial running surface in the area of the bearing disk has at least one further axial groove for guiding the lubricant.
    The advantage of this is that by reducing the profile depth in the rotating bearing disk, the instability caused by a radial speed component of the lubricating film is reduced. The axial grooves of the raceway take on a support film build-up of the lubricant of the rotating bearing disk and part of the axial oil supply for the axial sliding surface of the raceway. In this way, the lubrication of the sliding surface between the race and the bearing washer is improved.
    In an advantageous embodiment of the invention it is provided that the at least one axial groove in the radial inner surface and the at least one further axial groove in the radial running surface have a circular cylindrical or elliptical cross section. Due to the circular cylindrical or elliptical cross section, a flow of the lubricant in the direction of the raceway and bearing washer or a supply of the corresponding sliding surface is optimized.
    The axial bearing is preferably designed such that an area ratio of a cross-sectional area of the at least one further axial groove in the radial running surface to the at least one axial groove in the radial inner surface is 0.1 to 0.7. Since a lubricant consumption of the axial sliding surface between the race and the bearing disk corresponds to a shaft speed or a bearing disk speed of the respective application, in particular of the respective axial turbocharger, an adaptation of the area ratio of a cross-sectional area of the at least one further axial groove in the radial running surface to the at least one axial groove in the radial inner surface lubrication can be improved.
    In one embodiment of the invention it is provided that the at least one axial groove in the radial inner surface of the bearing washer and the at least one further axial groove in the radial running surface are inclined at an angle of 0 ° to 45 ° with respect to an axis of rotation of the axial bearing or run diagonally to it. The axial lubricant supply is influenced by an inclination or an inclined course and can be adapted and thus optimized to a shaft speed or a bearing disk speed of the respective application, in particular of the respective axial turbocharger.
    Furthermore, an embodiment is favorable in which a longitudinal extension of the at least one further axial groove of the race in an axial direction of the axial bearing corresponds to an extension of the bearing washer in the axial direction. In this way, the at least one further groove of the raceway is arranged precisely in the area which is particularly important for the lubrication, since the bearing washer is positioned there.
    In a further advantageous embodiment, the invention provides that the thrust bearing, the race and the bearing washer are made of a ferrous material.
    In addition, a variant of the invention is favorable in which the bearing disc and the race are hardened, coated or untreated. It is advantageous that the bearing disk and the raceway can be adapted to the respective application of the axial bearing, in particular to the respective axial turbocharger, and an associated degree of purity of the lubricant.
    The axial bearing according to the invention is designed in an advantageous embodiment such that the thrust bearing has a lubricant supply for the lubricant for lubricating the radial running surface of the race and the two axial sliding surfaces integrally, preferably via a lubricant channel. The advantage of a lubricant supply integrated in the thrust bearing is that the thrust bearing is a stationary or fixed component when the thrust bearing is in the assembled state. As a result, the lubricant supply of the axial bearing can be integrated particularly easily into an already existing lubricant circuit.
    In a preferred embodiment of the invention, an outlet opening of the lubricant supply is arranged on the end face towards the running surface of the raceway. As a result, the lubricant enters the axial bearing at a point at which it can be guided particularly favorably to the sliding surface between the thrust bearing and the bearing disc or the sliding surface between the race and the bearing disc or distributed between the two sliding surfaces.
    In a further advantageous embodiment, the invention provides that a gap is formed between the radial inner surface and the radial running surface. Furthermore, a groove depth of at least the at least one axial groove in the radial inner surface and / or the at least one further axial groove in the radial running surface is larger in the radial direction than a gap width of the gap.
    According to the invention, an axial turbocharger is also proposed with at least one axial bearing with the features described above, which comprises a shaft which is rotatably received in the at least one axial bearing. The advantage of this is that, by means of the grooves arranged in the raceway and in the rotating bearing disk, a lubricant supply to the axial bearing of the axial turbocharger is improved.
    In an advantageous embodiment of the invention it is provided that the axial turbocharger has a housing and the respective thrust bearing is attached to the housing for the fixed fixing of the respective axial bearing. As a result, the axial bearing is integrated and fixed in the axial turbocharger.
    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 axial bearing for a shaft of an axial turbocharger, FIG. 2 shows a cross section of the axial bearing for a shaft of an axial turbocharger, and FIG. 3 shows a sectional view of a raceway of the axial bearing for a shaft of an axial turbocharger.
    In Figure 1 is a sectional view of an axial bearing 1 for a shaft of an axial turbocharger is shown. The axial bearing 1 comprises a thrust bearing 3 for the stationary fixing of the axial bearing 1 and for receiving an axial thrust acting on the axial bearing 1. In addition, the axial bearing 1 has a rotatable race 4 for receiving the shaft, which is received in the thrust bearing 3 with a radial running surface 5.
    The thrust bearing 3 comprises an integral lubricant supply 12 for a lubricant 11 for lubricating the radial running surface 5 of the race 4 and the two axial sliding surfaces 31, 41, which the thrust bearing 3 and the race 4 have, via a lubricant channel. The outlet opening of the lubricant supply 12 is arranged on the front side towards the running surface of the race 4.
    During operation of the axial turbocharger, the axial bearing 1 rotates about an axis of rotation RA and the lubricant 11 runs in the direction of the arrow.
    Furthermore, a freely rotatable bearing disk 6 is positioned between the two axial sliding surfaces 31, 41. The bearing washer 6 is rotatably arranged with a radial inner surface 7 on the radial running surface 5 of the raceway 4 and the radial inner surface 7 comprises an axial groove 9 for guiding a lubricant 11. In addition, the radial running surface 5 has a further axial groove in the area of the bearing washer 6 10 for guiding the lubricant 11. A longitudinal extension of the further axial groove 10 in an axial direction of the axial bearing 1 corresponds to an extension of the bearing washer 6 in the axial direction.
    The thrust bearing 3, the race 4 and the bearing washer 6 of the axial bearing 1 are made of an iron material. In addition, the bearing washer 6 and the race 4 are coated.
    Figure 2 shows a cross section of the axial bearing 1 shown in Figure 1 for a shaft of an axial turbocharger. The axial groove 9 in the radial inner surface 7 and the further axial groove 10 in the radial running surface 5 have a partially circular cylindrical cross section. Furthermore, an area ratio of a cross-sectional area of the further axial groove 10 in the radial running surface 5 to the axial groove 9 in the radial inner surface 7 is approximately 0.3.
    Furthermore, a gap 13 is formed between the radial inner surface 7 and the radial running surface 5. A groove depth of the axial groove 9 in the radial inner surface 7 and of the further axial groove 10 in the radial running surface 5 in the radial direction is greater than a gap width of the gap 13.
    In Figure 3 is a sectional view of the race 4 of the axial bearing 1 for a shaft of an axial turbocharger is shown, in which it is shown that the further axial groove 10 in the radial running surface 5 at an angle of 40 ° with respect to the axis of rotation RA of the axial bearing 1 is inclined or runs obliquely to it.
    List of reference symbols
    1 axial bearing 3 thrust bearing 31 axial sliding surface 4 bearing ring 41 axial sliding surface 5 radial running surface 6 bearing washer 7 radial inner surface 9 axial groove 10 further axial groove 11 lubricant 12 lubricant supply 13 gap
    权利要求:
    Claims (12)
    [1]
    1. Axial bearing (1) for a shaft, in particular an axial turbocharger, with a thrust bearing (3) for the stationary fixation of the axial bearing (1) and a rotatable race (4) for receiving the shaft, which has a radial running surface (5) in the Thrust bearing (3) is added,wherein the thrust bearing (3) and the race (4) each have an axial sliding surface (31, 41),a freely rotatable bearing disk (6) being arranged between the two axial sliding surfaces (31, 41),wherein the bearing washer (6) is rotatably arranged with a radial inner surface (7) on the radial running surface (5) of the raceway (4) and the radial inner surface (7) comprises at least one axial groove (9) for guiding a lubricant (11) , andwherein the radial running surface (5) has at least one further axial groove (10) for guiding the lubricant (11) in the area of the bearing disk (6).
    [2]
    2. Axial bearing (1) according to claim 1, characterized in that the at least one axial groove (9) in the radial inner surface (7) and the at least one further axial groove (10) in the radial running surface (5) is a part-circular cylindrical or part-elliptical Have cross-section.
    [3]
    3. Axial bearing (1) according to claim 1 or 2, characterized in that an area ratio of a cross-sectional area of the at least one further axial groove (10) in the radial running surface (5) to the at least one axial groove (9) in the radial inner surface ( 7) is 0.1 to 0.7.
    [4]
    4. Axial bearing (1) according to one of claims 1 to 3, characterized in that the at least one axial groove (9) in the radial inner surface (7) of the bearing washer (6) and the at least one further axial groove (10) in the radial running surface (5) are inclined at an angle of 0 ° to 45 ° with respect to an axis of rotation of the axial bearing (1) or run obliquely to it.
    [5]
    5. Axial bearing (1) according to one of the preceding claims, characterized in that a longitudinal extension of the at least one further axial groove (10) in an axial direction of the axial bearing (1) corresponds to an extension of the bearing washer (6) in the axial direction.
    [6]
    6. Axial bearing (1) according to one of the preceding claims, characterized in that the thrust bearing (3), the race (4) and the bearing washer (6) are made of a ferrous material.
    [7]
    7. Axial bearing (1) according to one of the preceding claims, characterized in that the bearing washer (6) and the race (4) are hardened, coated or untreated.
    [8]
    8. Axial bearing (1) according to one of the preceding claims, characterized in that the thrust bearing (3) has a lubricant supply (12) for the lubricant (11) for lubricating the radial running surface (5) of the race (4) and the two axial sliding surfaces (31, 41) integrally, preferably via a lubricant channel.
    [9]
    9. Axial bearing (1) according to claim 8, characterized in that an outlet opening of the lubricant supply (12) is arranged on the end face towards the running surface of the raceway (4).
    [10]
    10. Axial bearing (1) according to one of the preceding claims, characterized in that a gap (13) is formed between the radial inner surface (7) and the radial running surface (5), a groove depth of at least the at least one axial groove (9) in the radial inner surface (7) and / or the at least one further axial groove (10) in the radial running surface (5) is formed larger in the radial direction than a gap width of the gap (13).
    [11]
    11. Axial turbocharger with at least one axial bearing (1) according to one of the preceding claims, characterized in that the axial turbocharger comprises a shaft which is rotatably received in the at least one axial bearing (1).
    [12]
    12. Axial turbocharger according to claim 11, characterized in that the axial turbocharger has a housing, the respective thrust bearing (3) being fastened to the housing for the fixed fixing of the respective axial bearing (1).
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    同族专利:
    公开号 | 公开日
    DE102020114268A1|2021-12-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE19641673B4|1996-10-11|2005-09-01|Abb Turbo Systems Ag|axial plain|
    DE50009877D1|2000-10-17|2005-04-28|Abb Turbo Systems Ag Baden|Hydrodynamic thrust bearing with floating disk|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102020114268.4A|DE102020114268A1|2020-05-28|2020-05-28|Axial bearing for an axial turbocharger|
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