Hydraulic oil composition with high extreme pressure performance

A hydraulic oil composition, composition technology, applied in the direction of lubricating composition, petroleum industry, etc., can solve the problem that the extreme pressure property cannot meet its index requirements, etc.

Active Publication Date: 2012-02-01
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the continuous development of hydraulic component manufacturing technology, the working pressure of the hydraulic system continues to increase. Therefore, some hydraulic component manufacturers use hydraulic oil for their hydraulic components, in addition to ensuring the comprehensive performance of other hydraulic oils. The extreme pressure and anti-wear properties of the oil put forward higher requirements. It is required that the sintering load PD value measured according to the GB / T 3142 four-ball machine method is not less than 1236N, the maximum non-seizing load PB value is not less than 785N, and the comprehensive wear value ZMZ is greater than 295N, but the extreme pressure properties of the oils currently available in the market cannot meet the requirements of its indicators

Method used

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  • Hydraulic oil composition with high extreme pressure performance
  • Hydraulic oil composition with high extreme pressure performance
  • Hydraulic oil composition with high extreme pressure performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Take 0.3kg of zinc dialkyl dithiophosphate (T203, alkyl is C4~C8), 0.05kg of dialkyl dithiophosphate amine salt (Irgalube 349, alkyl is C10~C14), dialkyl dithiophosphate Phosphorothioate (Irgalube 353, alkyl is C4) 0.05kg, 4-octyl-4'-butyldiphenylamine (T557) 0.1kg, dinonyl naphthalene sulfonate calcium (NA-Sul 729) 0.06kg, Then add successively in API I type base oil (viscosity index 82, sulfur content 0.07%, saturated hydrocarbon 85%) 9.44kg and API II type base oil (viscosity index 106, sulfur content 0.01%, saturated hydrocarbon 99%) in 90kg, Mixing and stirring were carried out at 50° C. for 3 hours to prepare a hydraulic oil composition.

Embodiment 2

[0031] Take 0.2kg of zinc dialkyldithiophosphate (T204, alkyl is C4~C8), 0.6kg of dialkyldithiophosphate (Irgalube 353, alkyl is C4), 2,6-di-tert-butyl p-cresol (Hitec 4701) 0.1kg, polymethacrylate (16 carbon atoms) 0.1kg, and then added to API Group I base oil (viscosity index 85, sulfur content 0.08%, saturated hydrocarbon 87%) 23.5 kg and 75 kg of API II group base oil (viscosity index 105, sulfur content 0, saturated hydrocarbon 95%), mixed and stirred at 40° C. for 5 hours to prepare a hydraulic oil composition.

Embodiment 3

[0033] Take 0.4kg of zinc dialkyl dithiophosphate (T203, alkyl is C4~C8), 0.2kg of dialkyl dithiophosphate amine salt (Irgalube 349, alkyl is C10~C14), dialkyl dithiophosphate Phosphorothioate (Irgalube 353, alkyl is C4) 0.05kg, 4-octyl-4'-butyldiphenylamine (T557) 0.2kg, polymethacrylate (carbon number is 12) 0.3kg, two Calcium nonylnaphthalene sulfonate (NA-Sul 729) 0.1kg, compound antifoam agent (T921) 0.1kg, and then added to API Group I base oil (viscosity index 82, sulfur content 0.07%, saturated hydrocarbon 85%) 35kg 63.74kg of API II base oil (viscosity index 106, sulfur content 0.01%, saturated hydrocarbon 99%) was mixed and stirred at 70°C for 2 hours to prepare a hydraulic oil composition.

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Abstract

The invention provides a hydraulic oil composition with a high extreme pressure performance. The composition comprises base oil and an extreme pressure anti-wear agent accounting for 0.3-3% of the total weight of the composition, with the base oil composed of API I type oil and API II type oil in a weight ratio of 1:15-1:1.5. The hydraulic oil composition with a high extreme pressure performance in the invention, according to a test by the GB/T 3142 determination method for the load carrying capacity of lubricant (a four-ball method, under a test condition of 1760rpm), has a sintering load greater than or equal to 1236N, a maximum nonseizure load greater than or equal to 785N, and ZMZ greater than or equal to 295N. Compared with present products, the hydraulic oil composition of the invention has a high extreme pressure performance, and is suitable for various low, medium, high and even ultrahigh pressure hydraulic systems in engineering machineries and industrial equipment.

Description

technical field [0001] The invention relates to a lubricating oil composition, in particular to a hydraulic oil composition with high extreme pressure performance, which is suitable for various low, medium, high and even ultra-high pressure hydraulic systems of engineering machinery and industrial equipment. Background technique [0002] Hydraulic transmission control is a commonly used control method in mechanical transmission. It uses hydraulic pumps, hydraulic valves, and motors to complete the process of transferring energy. The control method has high flexibility and convenience. [0003] With the continuous development of hydraulic component manufacturing technology, the working pressure of the hydraulic system continues to increase. Therefore, some hydraulic component manufacturers use hydraulic oil for their hydraulic components, in addition to ensuring the comprehensive performance of other hydraulic oils. The extreme pressure and anti-wear properties of the oil put...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10N40/08C10N30/06
Inventor 陈惠卿万福新李万英汤涛韦安柱王向阳
Owner CHINA PETROLEUM & CHEM CORP
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