Method of diagnosing lubricated portion and system of diagnosing lubricated portion
First Claim
1. A method of diagnosing a lubricated portion comprising the steps of:
- filtrating a lubricating oil picked up from the lubricated portion so as to separate a large-diameter metal particle;
thereafter measuring a metal concentration of a solution formed by dissolving said large-diameter metal particle by an acid in accordance with an emission spectrometry and measuring a metal concentration of a filtrate in accordance with the emission spectrometry; and
diagnosing a state of said lubricated portion on the basis of the respective metal concentrations of said solution and said filtrate.
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Accused Products
Abstract
The invention provides a method of diagnosing a lubricated portion which can precisely measure a metal concentration in a lubricating oil and can diagnose accurately a state of the lubricated portion on the basis of a value of measurement. In accordance with the present diagnosing method, a lubricating oil picked up from the lubricated portion is diluted by an organic solvent so as to prepare a sample oil, the sample oil is filtrated by a filter so as to separate a large-diameter metal particle having a particle diameter larger than 0.5 μm, a metal concentration of a solution formed by dissolving the large-diameter metal particle by an acid and a metal concentration of a filtrate including a small-diameter metal particle having a particle diameter equal to or smaller than 0.5 μm is measured in accordance with the inductively coupled plasma analysis, an wear depth in the lubricated portion is determined on the basis of the respective metal concentrations of the solution and the filtrate, and an wear state of the lubricated portion is diagnosed on the basis of a rate of change of the wear depth in accordance with a time elapse.
12 Citations
8 Claims
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1. A method of diagnosing a lubricated portion comprising the steps of:
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filtrating a lubricating oil picked up from the lubricated portion so as to separate a large-diameter metal particle;
thereafter measuring a metal concentration of a solution formed by dissolving said large-diameter metal particle by an acid in accordance with an emission spectrometry and measuring a metal concentration of a filtrate in accordance with the emission spectrometry; and
diagnosing a state of said lubricated portion on the basis of the respective metal concentrations of said solution and said filtrate. - View Dependent Claims (2, 3, 4)
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5. A system of diagnosing a lubricated portion comprising:
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a filtrating means for filtrating a lubricating oil picked up from the lubricated portion so as to separate a large-diameter metal particle;
an emission spectrometry means for measuring respective metal concentrations of a solution formed by dissolving said large-diameter metal particle by an acid and a filtrate;
a diagnosing means for diagnosing a state of said lubricated portion on the basis of the respective metal concentrations of said solution and said filtrate; and
a display means for displaying a result of diagnosis of said diagnosing means. - View Dependent Claims (6, 7, 8)
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Specification