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Method for detecting structural defect in mechanical assembly including rotary member

A detection method and a technology of mechanical components, which are applied in the testing of mechanical components, rotating bearings, testing of machine/structural components, etc., can solve problems such as large integration limitations

Inactive Publication Date: 2012-05-30
TORRINGTON COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this implementation requires the addition of accelerometers which, in addition to their cost, have major integration constraints in mechanical assemblies including rotating parts

Method used

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  • Method for detecting structural defect in mechanical assembly including rotary member
  • Method for detecting structural defect in mechanical assembly including rotary member
  • Method for detecting structural defect in mechanical assembly including rotary member

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Embodiment Construction

[0017] In the following a method for detecting structural defects of a mechanical assembly comprising a roller bearing formed by a rotating element, a stationary element and at least one row of rolling elements arranged on said rotating Between the machine part and the fixed machine part, so as to allow the relative rotation of the rotating machine part and the fixed machine part. Furthermore, the description refers to a bearing that guides the rotation of a mechanical assembly that is carried in a motor vehicle, in particular a roller bearing that guides the rotation of a gearbox shaft.

[0018] However, the invention may be applied to detecting structural defects in another type of mechanical assembly comprising a rotating part, and / or in another application, for example in a static application such as in a machine tool carrying a rotating part .

[0019] In particular, the structural defects to be detected may arise due to the mechanical stresses caused by the rotation of ...

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Abstract

The invention relates to a method for detecting a structural defect in a mechanical assembly including a rotary member, wherein said method comprises a preliminary analysis for identifying a frequency characteristic of the occurrence of the defect over a revolution of said member, and the iterative steps of: measuring the instantaneous rotation speed of the rotary member; angularly sampling said measure so as to obtain a sampled signal representative of the instantaneous rotation speed of the member; carrying a harmonic space analysis of the sampled signal in order to obtain a spectrum of the instantaneous rotation speed of the member; and monitoring the amplitude of the spectrum for the characteristic frequency so as to derive the occurrence of a corresponding defect based on said amplitude.

Description

technical field [0001] The invention relates to a method for detecting structural defects of mechanical assemblies including rotating parts and the use of such a method for on-board diagnosis of the state of wear of mechanical assemblies including rotating parts for motor vehicles. [0002] In particular, the invention can be used to detect structural defects in the rotating parts of bearings, in particular in the rotating rings of roller bearings guiding the rotation of mechanical components. As a variant, the invention may be used to detect structural defects of a mechanical assembly comprising a rotating component, of another component comprising a stationary component. [0003] For example, mechanical components can belong to gearboxes, geared motors, transmissions, self-starters, turbines, reactors, transmissions, clutches, spindles or bearings for machined spindles. [0004] The use of methods for detecting structural defects allows rotating parts to also assume the fun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/04F16C19/52B60C23/06
CPCG01M13/00F16C19/52G01M13/028G01M13/045G01M13/04G01M17/00
Inventor P·德比奥勒M·阿尔巴达维O·米西D·雷蒙
Owner TORRINGTON COMPANY