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Lubricant composition for railway high-speed diesel engine

A technology for lubricating oil composition and diesel engine, applied in lubricating composition, petroleum industry, additives and other directions, can solve the problems of corrosion and wear, corrosion of silver bearing, etc., and achieve the effect of good high-temperature cleaning and excellent anti-oxidation performance

Active Publication Date: 2012-09-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since many heavy-duty railway diesel engines are equipped with silver-surfaced engine parts, such as silver bearings or silver-plated bearings, the use of zinc dialkyldithiophosphate (ZDDP) will cause corrosion to silver bearings, and many lubricating oils formulated with ZDDP Unacceptable corrosion and wear on engine silver surface components

Method used

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  • Lubricant composition for railway high-speed diesel engine
  • Lubricant composition for railway high-speed diesel engine
  • Lubricant composition for railway high-speed diesel engine

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1-4

[0056] Add antioxidants T534, 1035, and methylidene 4426-S into the mixing container in proportion, heat at 60°C-90°C under normal pressure, and stir for 1 hour-2 hours to obtain a uniform transparent light yellow viscous liquid. Invented component A composite antioxidant. The composition ratio (mass fraction) of composite antioxidant preparation examples 1-4 is shown in Table 1.

[0057] Table 1

[0058] serial number

Embodiment 1

[0060] Examples 1-5 are the composition of the zinc-free lubricating oil composition for 20W-40 grade railway medium and high-speed diesel engines of the present invention. Add each component into a mixing container in proportion, heat at 45°C-80°C under normal pressure, and stir for 1-2 hours to prepare a zinc-free lubricating oil composition for railway medium and high-speed diesel engines with a viscosity grade of 20W-40. In comparative examples 1, 2, and 3-1, single-component antioxidants were added, namely T534, 1035, and methylene 4426-S, and in comparative example 3-2, a double-component antioxidant prepared by the method of patent CN100460490C was added. Divide compound antioxidant, wherein embodiment 1 and comparative example 1, embodiment 2 and comparative example 2 have all identical formulas except antioxidant respectively, and embodiment 3 and comparative example 3-1, 3-2 also have All the same formula composition except antioxidant. See Table 2 for the compositi...

Embodiment 6-9

[0070] Embodiment 6-9 and comparative example 4,5

[0071] Examples 6-9 are zinc-free lubricating oil compositions for medium and high-speed railway diesel engines with a viscosity grade of 20W-40 according to the present invention, and the preparation method thereof is the same as that of the previous examples. The coke-forming test was carried out for Examples 6-9 and Comparative Examples 4 and 5, and the formula composition and coke-forming test results are shown in Table 6. Wherein the mixture of calcium sulfonate with high basic value and calcium naphthenate was added in Examples 6-9, and calcium sulfonate and calcium naphthenate of single component were added in Comparative Examples 4 and 5 respectively.

[0072] Table 6

[0073]

[0074] The equipment used in the coke plate test is the 25B-19 coke plate tester produced by Japan Meitech Company. This test simulates the working conditions of the engine crankcase and cylinder liner piston ring lubricating oil circulati...

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Abstract

The invention relates to a lubricant composition for a railway high-speed diesel engine. The lubricant composition comprises A) a composite antioxidant comprising at least components of 1, an alkylated diphenylamine antioxidant, 2, a thiophenolic ester antioxidant and 3, an unessential phenolic thioether antioxidant, B) a polyisobutylene succinimide ashless dispersant and / or a polyisobutylene succinate dispersant, C) a mixture of calcium sulfonate and calcium naphthenate, D) at least one extreme pressure anti-wear agent, E) one or more ashless friction modifiers, and F) a main amount of lubricating base oil. The lubricant composition has a synergistic effect of the additives, can satisfy high-temperature antioxidation requirements of lubricating oil for a railway high-speed diesel engine, and has excellent piston cleanliness, high / low-temperature wear resistance and a good viscosity increasing control capacity.

Description

technical field [0001] The invention relates to an engine lubricating oil composition, in particular to a lubricating oil composition used for railway medium and high-speed diesel engines. Background technique [0002] Lubricating oils for railway heavy-duty diesel engines are required to have high oxidation stability and limit the formation of engine deposits. In addition, they must also have strong resistance to bearing corrosion and have a high base number to neutralize Acids and acidic oxidation products from fuel combustion blow-by gases. [0003] In the national standard GB / T17038-1997 for diesel engine oil for railway diesel locomotives in China, the fourth-generation railway locomotive engine oil is divided into two categories: zinc-containing and zinc-free. Since many heavy-duty railway diesel engines are equipped with silver-surfaced engine parts, such as silver bearings or silver-plated bearings, the use of zinc dialkyldithiophosphate (ZDDP) will cause corrosion ...

Claims

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Application Information

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IPC IPC(8): C10M161/00C10N30/06C10N30/10C10N40/25
Inventor 谢欣张辉武志强李新华王立华段庆华贾秋莲杨永璧
Owner CHINA PETROLEUM & CHEM CORP
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