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Method for the preservation of a machine element and use of an anionic liquid

Inactive Publication Date: 2016-10-20
SCHAEFFLER TECH AG & CO KG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a method for preserving machine elements by preventing white etching cracks. The method involves using a small amount of ionic liquid as a preservative, which results in a longer service life of the machine element before white etching cracks occur. The method is cost-efficient because only a small amount of ionic liquid is needed. The ionic liquid used in the method has good compatibility with traditional lubricants or additives and can be used with various types of lubricants. The amount of ionic liquid in the lubricant should be between 0.3% and 10% by weight.

Problems solved by technology

However the amount required for this is high, thereby resulting in substantial costs.
Furthermore, use of large amounts of ionic liquids as lubricant components has resulted in new problems, such as a previously unresearched toxicological effect.

Method used

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  • Method for the preservation of a machine element and use of an anionic liquid
  • Method for the preservation of a machine element and use of an anionic liquid
  • Method for the preservation of a machine element and use of an anionic liquid

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Embodiment Construction

[0064]One exemplary embodiment of the present invention is described in greater detail below.

[0065]A machine element manufactured from a steel alloy, namely a rolling bearing consisting of an outer ring, an inner ring and rolling bodies in the form of balls situated in between is preserved after being manufactured by applying an ionic liquid as a preservative to the surface of a rolling bearing. The ionic liquid used in this exemplary embodiment is trioctyl(methyl)ammonium dimethyl phosphate.

[0066]The ionic liquid is characterized in that between 0.3% and 10% by weight, it is fat or oil-soluble without salting out.

[0067]The process of preserving the machine element by applying the ionic liquid is carried out by the manufacturer after the machine element has been manufactured. In the preserved state, the machine element, in particular the rolling bearing, is delivered to a customer. In this exemplary embodiment the rolling bearing is used only to support a rotatable component of a wi...

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Abstract

A method for the preservation of a machine element, in which, after the production and before the installation and / or start-up of the machine element, a preservative is applied on the surface thereof, wherein an ionic liquid is used as a preservative is provided.

Description

[0001]The present invention relates to a method for preserving a machine element, a preservative being applied to its surface after its manufacture and prior to the installation and / or start of operation of the machine element.BACKGROUND[0002]To prevent damage to a machine element, in particular a machine element made of a steel alloy, it is customary to use a preservative in post-manufacturing treatment of such machine elements to prevent corrosion.[0003]In past years, a new damage phenomenon known as “white etching cracks” (WEC) has occurred in machine elements, in particular in rolling bearings. These cracks appear in metallographic images of damaged areas of machine elements, in particular in rolling bearing raceways. In practice, the occurrence of such white etching cracks has resulted in failure of large rolling bearings, such as those installed in wind power plants, for example, long before their statistical service life expectancy in some cases, resulting in substantial dama...

Claims

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Application Information

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IPC IPC(8): C10M171/00C23F11/16C23F11/167C23F11/14
CPCC10M171/00C23F11/141C23F11/16C10N2240/02C10N2220/04C10N2230/06C23F11/167C10M2215/04C10M2223/04C10M2223/043C10N2020/077C10N2030/26C10N2030/12C10N2030/70C10N2040/02C10N2040/04C10N2030/06
Inventor BOESMANN, ANDREASWESTERHOLD, ANTJEWASSERSCHEID, PETERKORTH, YASMINWOLF, MARCUSHOLWEGER, WALTERPOHRER, BENJAMINSCHLUECKER, EBERHARDUERDINGEN, MARCWEHRUM, NATALIE
Owner SCHAEFFLER TECH AG & CO KG
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