Method and system for monitoring the function of a lubricated machine element

• US 10,481,042 B2
• Filed: 03/26/2014
• Issued: 11/19/2019
• Est. Priority Date: 03/26/2014
• Status: Active Grant

• Current Assignee: Schaeffler Technologies AG & Co.KG (INA-Holding Schaeffler GmbH & Co. KG)
• Original Assignee: Schaeffler Technologies AG & Co.KG (INA-Holding Schaeffler GmbH & Co. KG)
• Inventors: Holweger, Walter, Wolf, Marcus, Goss, Matthias
• Primary Examiner(s): Ngon, Ricky
• Application Number:
  US15/129,227
• Publication Number:
  US 20170205313A1
• Time in Patent Office: 2,064 Days
• Field of Search: 702 35
• CPC Class Codes: G01M 13/04 Bearings
• CPC Class Codes: G05B 23/0224 Process history based detection method, e.g. whereby history implies the availability of large amounts of data
• CPC Class Codes: G06Q 10/20 Administration of product repair or maintenance

Abstract

The invention relates to a method for monitoring the function of a machine element lubricated by a lubricant. The method includes receiving measured values concerning the lubricant, determining a current chemical composition of the lubricant on the basis of the measured values, comparing the current chemical composition with chemical compositions known in advance, which are stored in a database, wherein function failure tendency values for the use of lubricants having the chemical compositions known in advance in connection with machine elements composed of materials known in advance are stored in the database, identifying a function failure tendency value on the basis of the comparison step, and outputting the function failure tendency value.

Claims

1. A method for monitoring the function of a machine element lubricated with a lubricant, comprising the following steps:

arranging a measurement system on the lubricated machine element and circulating the lubricant through a lubricant circuit to the lubricated machine element,

receiving measured values at the measurement system concerning the lubricant,

determining a current chemical composition of the lubricant based on the measured values,

comparing the current chemical composition with previously known chemical compositions that are stored in a database,

wherein, in the database, function failure tendency values are stored for the use of lubricants with previously known chemical compositions in interaction with machine elements from previously known materials,

identifying a function failure tendency value based on the comparing step,

outputting the function failure tendency value,

generating a time sequence based on multiple identified function failure tendency values,

outputting of a warning when the time sequence approaches a previously determined threshold value,

calculating a composition of an additive that is suitable for changing a current chemical composition of the lubricant of the lubricated machine element with the addition of the additive so that a function failure tendency value of the changed chemical composition of the lubricant indicates a lower function failure likelihood, and

outputting the composition of the additive.

2. The method according to claim 1, wherein the approach of the time sequence to the previously determined threshold is a characteristic curve.

3. The method according to claim 1, the method further comprising:

transmitting the measured values via a data connection.

4. The method according to claim 3, wherein a spectroscopy records the measured values.

5. The method according to claim 1, further comprising:

recording the measured values by a measurement system constructed for holding lubricant samples of the lubricated machine element, and

transmitting the measured values via a data connection.

6. A non-transitory computer readable medium containing computer instructions stored therein for directing a compute processor to perform the steps of the computer-implemented method according to claim 1.

7. The method according to claim 1, further comprising adding the additive to the lubricant.

8. A system for monitoring the function of a machine element lubricated with a lubricant, the system comprising:

a sensor arranged on the lubricated machine element,

a first interface component that receives measured values concerning the lubricant from the sensor, a data storage component that stores the measured values,

at least one processor component that;

determines a current chemical composition of the lubricant based on the measured values,

compares the current chemical composition with previously known chemical compositions stored in a database, wherein function failure tendency values for the use of lubricants with previously known chemical compositions in connection with machine elements from previously known materials are stored in the database, and

identifies a function failure tendency value based on the comparison,

generates a time sequence based on multiple identified function failure tendency values,

a second interface component (i) outputs the function failure tendency value, and (ii) output a warning when the time sequence approaches a previously determined threshold value, and

the at least one processor component calculates a composition of an additive that is suitable for changing a current chemical composition of the lubricant of the lubricated machine element via addition of an additive so that the function failure tendency value of the changed chemical composition of the lubricant indicates a lower function failure likelihood.

9. The system according to claim 8, wherein the at least one processor component calculates a characteristic curve,

and wherein the additional output of the warning is carried out based on an approach of the characteristic curve to the previously determined threshold value.

10. The system according to claim 8, wherein the second interface component outputs the composition of the additive.