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Method for determining bearing play of exhaust-gas-turbocharger friction bearings

A technology for exhaust turbine and bearing clearance, which is applied in the direction of rotating bearings, bearings, shafts and bearings, and can solve problems such as increased production costs and complicated processes

Inactive Publication Date: 2012-05-30
BORGWARNER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, this process is very complicated and thus increases production costs

Method used

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  • Method for determining bearing play of exhaust-gas-turbocharger friction bearings
  • Method for determining bearing play of exhaust-gas-turbocharger friction bearings
  • Method for determining bearing play of exhaust-gas-turbocharger friction bearings

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Embodiment Construction

[0047] exist Figure 6 The exhaust-gas turbocharger 1 shown in has the features that can be learned from the list of reference symbols at the end of this specification, where in Figure 6 In the case of the turbocharger 1 shown in , the term “body group” is understood to mean all components except the turbine housing 2 , the compressor housing 3 and the control components 11 , 12 and 14 .

[0048] If the bearing clearance of such a turbocharger 1 is to be determined according to this method according to the present invention, then at first assemble the Figure 6 This ontology group visible in . The body group is then balanced on a balancing stand, more details of which are not shown in the drawings. Depending on the design of the balance stand, the body pack may already contain the housing and control components required to complete the turbocharger.

[0049] After balancing, the body group or turbocharger is accelerated from standstill to maximum speed in a speed increase ...

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Abstract

The invention relates to a method for determining bearing play of exhaust-gas- turbocharger friction bearings comprising the following method steps: accelerating the exhaust-gas turbocharger or the body group from standstill to a maximum rotational speed and at the same time registering the vibration acceleration by means of a sensor; determining the constant-tone frequency of the friction bearing at at least one rotational speed; plotting the determined constant-tone frequency in a diagram, in which bearing-play ranges determined experimentally in advance are assigned to constant- tone frequency ranges; and establishing whether or not the determined constant-tone frequency lies in a bearing-play target range.

Description

technical field [0001] According to claim 1, the invention relates to a method for determining the bearing clearance of a radial friction bearing of an exhaust-gas turbocharger. Background technique [0002] Radial friction bearings are a type of bearing commonly used in exhaust turbochargers. Mainly a distinction is made between floating (rotating) and fixed (non-rotating) bearing bushes. In operation, they form an oscillating system whose properties are influenced both by the geometry of these individual parts and by the properties of the lubricating oil. As a result of the rotation, vortices are created in the lubricating oil film, and these vortices are also known by the terms half-frequency vortex, oil whirl or oil whip, and can cause self-excited vibration. The natural frequency of a system with such a friction bearing when excited by a rotating shaft, if on the one hand certain vibrational acceleration levels are exceeded and on the other hand the exhaust-gas turbo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B39/00F01D25/16F16C17/10
CPCF05B2260/80F02C6/12F01D25/166F05D2220/40F05B2220/40G01M13/045F05D2260/80F16C17/246F16C2360/24F02B39/16Y02T10/12
Inventor N·沃尔特A·西勒
Owner BORGWARNER INC