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Bearing bushing and corresponding booster

A technology for bearing bushings and booster devices, applied to bearings, pump devices, shafts and bearings, etc., to achieve the effects of reducing noise scattering, improving friction loss, and reducing friction loss

Active Publication Date: 2021-06-01
BOSCH MAHLE TURBO SYST GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention thus solves the problem of proposing an improved or at least an alternative embodiment for a bearing bush of the general type, which is characterized in particular by a reduced noise scatter in the subcritical as well as in the supercritical range and which in particular can be easily manufacture

Method used

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  • Bearing bushing and corresponding booster
  • Bearing bushing and corresponding booster
  • Bearing bushing and corresponding booster

Examples

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Embodiment Construction

[0021] according to figure 1 , the charging device 1 according to the invention, which can be realized, for example, as an exhaust-gas turbocharger in a motor vehicle, has a rotor with a shaft 2 , wherein the shaft 2 is via at least one bearing bush 3 , in particular a bearing housing 4 supports. Hitherto it was possible to reduce noise dispersion in response to the operation of the supercharging device 1 by the rotating rotor, as well as friction, the inner sleeve surface 5 of the bearing bush 3 having at least two recesses 6 , a total of 3 in the example shown sunken 6. The respective lowest points 7 of the depressions 6 thus lie on a circle with a radius R1. Between the individual recesses 6 in the circumferential direction provision is made for a land surface 8 which is offset radially inwards and is curved with a uniform radius R2. According to the invention, the following ratio between the radius R1 and the radius R2 applies to the invention: R1 / R2≦1.001 to 1.015. Th...

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Abstract

The invention relates to a bearing bush (3) for a charging device (1), in particular an exhaust-gas turbocharger. It is therefore essential for the invention that the inner sleeve surface (5) of the bearing bush (3) has at least two radial depressions (6), the corresponding lowest points (7) of which are located On a circle with radius R1, provision is made circumferentially between said recesses (6) for table surfaces (8) offset radially inwards and curved with a uniform radius R2, The following ratio between R1 and R2 applies: R1 / R2=1.001 to 1.015.

Description

technical field [0001] According to the preamble of claim 1 , the invention relates to a bearing bush for a charging device, in particular for an exhaust-gas turbocharger. Also, the present invention relates to a supercharging device comprising such a bearing bush and an internal combustion engine comprising such a supercharging device. Background technique [0002] Corresponding supports are required for the subcritical and supercritical range of the rotor required in the case of superchargers, whereby, in addition to sufficient load-carrying capacity and stability of the bearings, it is also desired to reduce the relative Subsynchronous motion in bearings. In particular, undesired vibration behavior of the rotor can be reduced and an improved acoustic behavior of the charging device can be obtained by means of it. It goes without saying that a further aim is to reduce the frictional losses in the bearings so that the efficiency as well as the transient behavior of the su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C17/02F16C33/04F02C7/06F04D29/05
CPCF02C7/06F04D29/05F16C17/02F16C33/04F04D17/10F04D25/024F04D29/056F16C33/1065F16C33/1075F16C33/1085F16C2240/40F16C2240/70F16C2360/24F16C2360/23
Inventor 吕迪格·克莱因施密特奥利弗·库恩斯特芬·施米特弗里德·施泰特尔
Owner BOSCH MAHLE TURBO SYST GMBH & CO KG