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Lubricating oil composition

Inactive Publication Date: 2010-01-14
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0009]Under such circumstances, an object of the present invention is to provide a lubricating oil composition which has excellent anti-seizure performance, anti-fatigue performance, and reduced sludge formation in an oxidation test, and which is suitably used with a step-up gear for wind power generation.Means for Solving the Problems

Problems solved by technology

However, the proposed lubricating oil composition is not thought to exhibit completely satisfactory performance required for step-up gear oil compositions for wind power generation.

Method used

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  • Lubricating oil composition

Examples

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examples

[0074]The present invention will next be described in more detail by way of examples, which should not be construed as limiting the invention thereto.

[0075]Properties of the base oils employed in the Examples and those of the lubricating oil compositions obtained in the Examples were determined through the following methods.

(1) Kinematic Viscosity and Viscosity Index

[0076]Determined in accordance with JIS K 2283.

(2) Pour Point

[0077]Determined in accordance with JIS K 2265.

(3) FZG Seizure Test

[0078]The test was carried out in accordance with a method described in the present specification. Stage 13 is a pass level.

(4) Timken Test

[0079]The test was carried out in accordance with a method described in the present specification. The pass level is 45 lbs or higher.

(5) FZG Micropitting Test

[0080]The test was carried out in accordance with a method described in the present specification. Stage 9 is a pass level.

(6) Indiana Oxidation Test

[0081]The test was carried out in accordance with a m...

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Abstract

The lubricating oil composition contains a base oil; (A) an acidic alkyl phosphate ester having a C6 to C20 alkyl group; (B) a dialkylamine and / or a trialkylamine; and (C) (c-1) a sulfur compound in an amount of 0.2 to 0.6 mass % as reduced to S, the sulfur compound containing no poly-sulfur bond which is equal to or longer than —S—S—S— in a molecule thereof and having an S content of the molecule of 15 mass % or more and (c-2) an optional thiophosphoric acid trihydrocarbyl ester in an amount of 0.1 to 1.0 mass %, the ester being represented by formula (I):(R—O—)3P═S  (I)(wherein R represents a C6 to C20 hydrocarbyl group) and having a P content of the composition of 150 to 500 ppm by massThe lubricating oil composition has excellent anti-seizure performance, excellent anti-fatigue performance (e.g., anti-FZG-micropitting performance), and reduced sludge formation in an oxidation test.

Description

TECHNICAL FIELD[0001]The present invention relates to a lubricating oil composition and, more particularly, to a lubricating oil composition which exhibits excellent anti-seizure performance, excellent anti-fatigue performance, and reduced sludge formation in an oxidation test, and which is particularly suitable for use with a step-up gear for wind power generation.BACKGROUND ART[0002]Wind power generation, making use of renewable energy, is expected to increase in demand, as it will reduce the environment load and contribute to the conservation of fossil fuel, which have become important issues in recent years.[0003]In wind power generation employing wind force, kinetic energy of wind is transformed into power by means of rotors including propellers which are rotated by wind. By means of the generated power, a power generator is operated to produce electric energy.[0004]In the wind power generation, a step-up gear is employed to elevate the rotation rate of rotors, which is relativ...

Claims

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Application Information

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IPC IPC(8): C10M137/04
CPCC10M141/10C10N2240/04C10M2207/288C10M2207/289C10M2215/04C10M2215/044C10M2219/00C10M2219/022C10M2219/024C10M2219/066C10M2219/08C10M2219/082C10M2219/086C10M2219/104C10M2219/106C10M2223/04C10M2223/043C10M2223/047C10N2230/06C10N2230/10C10M169/04C10N2030/06C10N2030/10C10N2040/04
Inventor OKADA, TAHEI
Owner IDEMITSU KOSAN CO LTD
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