阅读说明：本技术 具有良好减摩抗磨性能的低粘度航空润滑油及其制备方法 (Low-viscosity aviation lubricating oil with good friction-reducing and wear-resisting properties and preparation method thereof ) 是由 鞠超 张蒙科 赵改青 王晓波 于 2021-07-29 设计创作，主要内容包括：本发明公开了一种具有良好减摩抗磨性能的低粘度航空润滑油及其制备方法；该润滑油包括如下组分：基础油三羟甲基丙烷酯,抗氧剂辛基丁基二苯胺,抗磨剂磷酸三酚酯或硫代磷酸三苯酯,金属减活剂,消泡剂,分散剂。制备方法：将一定比例的基础油、抗氧剂、抗磨剂、金属减活剂、消泡剂和分散剂加入容器中,在70-90℃温度下,搅拌15-30min。本发明的润滑油蒸发损失可控制在10％以内,起始氧化温度可达285℃以上,磨斑直径为0.4mm左右,SRV摩擦系数为0.14-0.15,在保证较高抗氧化抗蒸发的同时还具有优异的减摩耐磨性能。(The invention discloses a low-viscosity aviation lubricating oil with good antifriction and antiwear performances and a preparation method thereof; the lubricating oil comprises the following components: the anti-wear lubricating oil comprises base oil trimethylolpropane ester, an antioxidant octyl butyl diphenylamine, an anti-wear agent, namely tricresyl phosphate or triphenyl thiophosphate, a metal deactivator, a defoaming agent and a dispersing agent. The preparation method comprises the following steps: adding base oil, antioxidant, antiwear agent, metal deactivator, defoaming agent and dispersant in a certain proportion into a container, and stirring at 70-90 ℃ for 15-30 min. The evaporation loss of the lubricating oil can be controlled within 10 percent, the initial oxidation temperature can reach more than 285 ℃, the diameter of a wear scar is about 0.4mm, the SRV friction coefficient is 0.14-0.15, and the lubricating oil has excellent friction reduction and wear resistance while ensuring higher oxidation resistance and evaporation resistance.)

1. The low-viscosity aviation lubricating oil with good friction-reducing and wear-resisting properties is characterized by comprising the following components in percentage by weight: 90-98% of base oil, 1-5% of antioxidant, 1-5% of antiwear agent, 0.01-1% of metal deactivator, 0.05-0.5% of dispersant and 0.001-0.005% of defoamer.

2. A low viscosity aviation lubricant having good anti-friction and anti-wear properties according to claim 1 wherein the base oil is trimethylolpropane ester having a viscosity in the range of 12 to 16mm at 40 ℃²S, viscosity at 100 ℃ of 2.5-4.5mm²S, pour point<Flash point at-60 ℃ C>210℃。

3. The low viscosity aviation lubricant having good anti-friction and anti-wear properties of claim 1 wherein said antioxidant is octyl butyl diphenylamine.

4. The low viscosity aviation lubricating oil with good friction reducing and wear resisting properties of claim 1, wherein the antiwear agent is one or two of tricresyl phosphate or triphenyl thiophosphate mixed in any proportion.

5. The low viscosity aviation lubricant having good anti-friction and anti-wear properties of claim 1, wherein said metal deactivator is one or both of a thiadiazole derivative and a tolutriazole derivative mixed in an arbitrary ratio.

6. The low viscosity aviation lubricant having good anti-friction and anti-wear properties of claim 1 wherein said anti-foaming agent is methyl silicone oil.

7. The low viscosity aviation lubricant having good anti-friction and anti-wear properties of claim 1 wherein said dispersant is a bis-succinimide.

8. A preparation method of the low-viscosity aviation lubricating oil with good antifriction and antiwear performances according to claim 1 is characterized in that base oil, an antioxidant, an antiwear agent, a metal deactivator, a defoamer and a dispersant are added into a container according to the parts by weight, and stirred for 15-30min at the temperature of 70-90 ℃.

Technical Field

The invention relates to the field of lubrication, in particular to low-viscosity aviation lubricating oil with good antifriction and wear resistance and a preparation method thereof.

Background

The main shaft bearing of the aircraft engine is a core component of aircraft equipment, and under harsh and complex working conditions, the performance and reliability of the main shaft bearing directly influence the performance and reliability of the engine, and reasonable and effective lubrication plays a crucial role in the bearing. The failure of the aeroengine bearing mainly takes the oxidation coking of lubricating oil and the friction and wear of the bearing as main parts, and the aeroengine oil meets the requirements of oxidation and coking resistance and has antifriction and wear-resistant properties. At present, the domestic military engine oil is mainly prepared from Russian imported oil products in the warranty period, and domestic aviation oil is mainly adopted in the over-warranty period. However, domestic aviation oil has the problems of poor oxidation resistance, large coking, large evaporation loss and poor antifriction and wear-resistant effects, and domestic aviation engine oil products are not certified and applied in the field of civil engines. The invention aims to develop a low-viscosity aviation lubricating oil product with high oxidation resistance and excellent antifriction and wear resistance.

Disclosure of Invention

In order to solve the problems, the invention provides the low-viscosity aviation lubricating oil with good antifriction and antiwear performances and the preparation method thereof.

The technical scheme of the invention is as follows:

the low-viscosity aviation lubricating oil with good friction-reducing and wear-resisting properties is characterized by comprising the following components in percentage by weight: 90-98% of base oil, 1-5% of antioxidant, 1-5% of antiwear agent, 0.01-1% of metal deactivator, 0.05-0.5% of dispersant and 0.001-0.005% of defoamer.

Preferably, the base oil is trimethylolpropane ester having a viscosity in the range of 12 to 16mm at 40 ℃²S, viscosity at 100 ℃ of 2.5-4.5mm²S, pour point<Flash point at-60 ℃ C>210℃。

Preferably, the antioxidant is octyl butyl diphenylamine.

Preferably, the antiwear agent is one or two of tricresyl phosphate or triphenyl thiophosphate which are mixed in any proportion.

Preferably, the metal deactivator is one or two of thiadiazole derivative or tolutriazole derivative which are mixed in any proportion.

Preferably, the defoaming agent is methyl silicone oil.

Preferably, the dispersant is bis-succinimide.

A preparation method of low-viscosity aviation lubricating oil with good antifriction and antiwear properties comprises the following steps: adding base oil, an antioxidant, an antiwear agent, a metal deactivator, a defoaming agent and a dispersing agent into a container according to a certain weight percentage, and stirring for 15-30min at the temperature of 70-90 ℃.

The low-viscosity aviation lubricating oil with good antifriction and antiwear performances prepared by the invention has the advantages that the evaporation loss (204 ℃, 6.5 hours) can be controlled within 10 percent, the initial oxidation temperature can reach more than 285 ℃, the diameter of a wear scar is about 0.4mm (75 ℃, 20kgf, 1200r/min, 60min), the SRV friction coefficient is 0.14-0.15(80 ℃, 100N, 50HZ, 1mm, 30min), and the low-viscosity aviation lubricating oil with good antifriction and antiwear performances has excellent antifriction and antiwear performances while ensuring higher antioxidation and anti-evaporation performances.

Drawings

FIG. 1 is the initial oxidation temperature of example 1;

FIG. 2 is the initial oxidation temperature of example 2;

FIG. 3 is the initial oxidation temperature of example 3;

FIG. 4 is the 240 ℃ oxidative induction period of example 1;

FIG. 5 is the 240 ℃ oxidative induction period of example 2;

FIG. 6 is the 240 ℃ oxidative induction period of example 3;

FIG. 7 is the four-ball wear scar diameter of example 1;

FIG. 8 is the four-ball wear scar diameter of example 2;

FIG. 9 is the four ball wear spot diameter of example 3;

FIG. 10 is the SRV coefficient of friction of example 1;

FIG. 11 is the SRV coefficient of friction of example 2;

FIG. 12 is the SRV coefficient of friction of example 3;

FIG. 13 is the initial oxidation temperature of comparative example 1;

FIG. 14 is the 240 ℃ oxidative induction period of comparative example 1;

FIG. 15 is the initial oxidation temperature of comparative example 2;

FIG. 16 is the 240 ℃ oxidation induction period of comparative example 2;

FIG. 17 is the four-ball wear scar diameter for comparative example 3;

fig. 18 is the four-ball wear scar diameter of comparative example 4.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following specific embodiments and the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Adding trimethylolpropane ester, octyl butyl diphenylamine, triphenyl thiophosphate, liquid tolutriazole derivative, thiadiazole derivative, bis-succinimide and polymethylsilicone oil into a container according to a certain weight percentage, and stirring for 15-30min at the temperature of 70-90 ℃;

the trimethylolpropane ester used has a viscosity of 14mm at 40 DEG C²S, viscosity at 100 ℃ of 3.4mm²The pour point is-66 ℃, the flash point is 235 ℃, and the weight percentage is 93.6873%;

the weight percentage of the octyl butyl diphenylamine used is 3.0 percent;

the weight percentage of the triphenyl thiophosphate is 3.1 percent;

the weight percentage of the used liquid tolutriazole derivative is 0.08 percent;

the weight percentage of the thiadiazole derivative is 0.03 percent;

the weight percentage of the used bissuccinimide is 0.1 percent;

the weight percentage of the used polymethylsilicone oil is 0.0027 percent;

the heating temperature can be 85-90 deg.C, and stirring time is 20-25 min.

Example 2

Adding trimethylolpropane ester, octyl butyl diphenylamine, tricresyl phosphate, liquid tolutriazole derivative, thiadiazole derivative, bis-succinimide and polymethylsilicone oil into a container according to a certain weight percentage, and stirring for 15-30min at the temperature of 70-90 ℃;

the trimethylolpropane ester used has a viscosity of 14mm at 40 DEG C²S, viscosity at 100 ℃ of 3.4mm²The pour point is-66 ℃, the flash point is 235 ℃, and the weight percentage is 93.9873%;

the weight percentage of the octyl butyl diphenylamine used is 3.0 percent;

the weight percentage of the used tricresyl phosphate is 2.8 percent;

the weight percentage of the used liquid tolutriazole derivative is 0.08 percent;

the weight percentage of the thiadiazole derivative is 0.03 percent;

the weight percentage of the used bissuccinimide is 0.1 percent;

the weight percentage of the used polymethylsilicone oil is 0.0027 percent;

the heating temperature can be 75-85 deg.C, and stirring time is 20-25 min.

Example 3

Adding trimethylolpropane ester, octyl butyl diphenylamine, triphenyl thiophosphate, liquid tolutriazole derivative, thiadiazole derivative, bis-succinimide and polymethylsilicone oil into a container according to a certain weight percentage, and stirring for 15-30min at the temperature of 70-90 ℃;

the trimethylolpropane ester used has a viscosity of 14mm at 40 DEG C²S, viscosity at 100 ℃Degree of 3.4mm²The pour point is-66 ℃, the flash point is 235 ℃, and the weight percentage is 91.7873%;

the weight percentage of the octyl butyl diphenylamine used is 3.0 percent;

the weight percentage of the triphenyl thiophosphate is 5.0 percent;

the weight percentage of the used liquid tolutriazole derivative is 0.08 percent;

the weight percentage of the thiadiazole derivative is 0.03 percent;

the weight percentage of the used bissuccinimide is 0.1 percent;

the weight percentage of the used polymethylsilicone oil is 0.0027 percent;

the heating temperature can be 75-85 deg.C, and stirring time is 20-25 min.

The basic properties of the lubricating oils prepared in examples 1 to 3 are shown in Table 1, and the antioxidative properties are shown in Table 1 and FIGS. 1 to 6.

TABLE 1 basic Properties of examples 1, 2, 3

Frictional wear performance:

1. four-ball friction and wear test

The experimental conditions are as follows: the temperature is 75 ℃, the load is 20kgf, the rotating speed is 1200r/min, and the time is 60 min.

And (4) conclusion: example 1 had a scrub spot diameter of 0.407mm, example 2 had a scrub spot diameter of 0.432mm, and example 3 had a scrub spot diameter of 0.373 mm.

The four-ball wear scar diameters are shown in fig. 7, 8 and 9.

2. SRV frictional wear test

The experimental conditions are as follows: the temperature is 80 ℃, the load is 100N, the frequency is 50HZ, the stroke is 1mm, and the time is 30 min.

And (4) conclusion: the stable phase is reached after undergoing the friction running-in phase, and the friction coefficient of example 1 is finally stabilized at 0.145, the friction coefficient of example 2 is finally stabilized at 0.144, and the friction coefficient of example 3 is finally stabilized at 0.148.

The SRV friction coefficients are shown in figures 10, 11, 12.

Comparative example 1 (thiotriphenyl phosphate-free antifriction antiwear agent):

adding trimethylolpropane ester, octyl butyl diphenylamine, liquid tolutriazole derivative, thiadiazole derivative, bis-succinimide and polymethylsilicone oil into a container according to a certain weight percentage, and stirring for 15-30min at the temperature of 70-90 ℃;

the trimethylolpropane ester used has a viscosity of 14mm at 40 DEG C²S, viscosity at 100 ℃ of 3.4mm²The pour point is-66 ℃, the flash point is 235 ℃, and the weight percentage is 93.6873%;

the weight percentage of the octyl butyl diphenylamine used is 3.0 percent;

the weight percentage of the used liquid tolutriazole derivative is 0.08 percent;

the weight percentage of the thiadiazole derivative is 0.03 percent;

the weight percentage of the used bissuccinimide is 0.1 percent;

the weight percentage of the used polymethylsilicone oil is 0.0027 percent;

the heating temperature can be 75-85 deg.C, and stirring time is 20-25 min.

Comparative example 1 (triphenyl phosphorothioate-free friction reducing antiwear agent) had an initial oxidation temperature of 283.3 deg.C (FIG. 13) and an oxidation induction period of 26.4min at 240 deg.C (FIG. 14). Both the initial oxidation temperature and the oxidation induction period are significantly reduced compared to example 1.

Comparative example 2 (phosphate-free trichenolate anti-friction and anti-wear agent):

adding trimethylolpropane ester, octyl butyl diphenylamine, liquid tolutriazole derivative, thiadiazole derivative, bis-succinimide and polymethylsilicone oil into a container according to a certain weight percentage, and stirring for 15-30min at the temperature of 70-90 ℃;

the trimethylolpropane ester used has a viscosity of 14mm at 40 DEG C²S, viscosity at 100 ℃ of 3.4mm²(s) pour point-66 ℃ flash point 235 ℃ by weightThe percentage is 93.9873%;

the weight percentage of the octyl butyl diphenylamine used is 3.0 percent;

the weight percentage of the used liquid tolutriazole derivative is 0.08 percent;

the weight percentage of the thiadiazole derivative is 0.03 percent;

the weight percentage of the used bissuccinimide is 0.1 percent;

the weight percentage of the used polymethylsilicone oil is 0.0027 percent;

the heating temperature can be 75-85 deg.C, and stirring time is 20-25 min.

Comparative example 2 (tricresyl phosphate-free friction and antiwear agent) had an initial oxidation temperature of 283.8 deg.C (FIG. 15) and an oxidation induction period of 25.9min at 240 deg.C (FIG. 16). Both the initial oxidation temperature and the oxidation induction period time were reduced compared to example 2.

Comparative example 3 (no octyl butyl diphenylamine antioxidant):

adding trimethylolpropane ester, triphenyl thiophosphate, liquid tolutriazole derivative, thiadiazole derivative, bis-succinimide and polymethylsilicone oil into a container according to a certain weight percentage, and stirring for 15-30min at the temperature of 70-90 ℃;

the trimethylolpropane ester used has a viscosity of 14mm at 40 DEG C²S, viscosity at 100 ℃ of 3.4mm²The pour point is-66 ℃, the flash point is 235 ℃, and the weight percentage is 93.6873%;

the weight percentage of the triphenyl thiophosphate is 3.1 percent;

the weight percentage of the used liquid tolutriazole derivative is 0.08 percent;

the weight percentage of the thiadiazole derivative is 0.03 percent;

the weight percentage of the used bissuccinimide is 0.1 percent;

the weight percentage of the used polymethylsilicone oil is 0.0027 percent;

the heating temperature can be 75-85 deg.C, and stirring time is 20-25 min.

Comparative example 3 (no octylbutyldiphenylamine antioxidant) was found to have a larger scrub spot diameter at a temperature of 75 deg.C, a load of 20kgf, a rotation rate of 1200r/min, and a time of 60min of 0.450mm (FIG. 17) compared to the scrub spot diameter of 0.407mm of example 1.

Comparative example 4 (no octyl butyl diphenylamine antioxidant):

adding trimethylolpropane ester, tricresyl phosphate, liquid tolutriazole derivative, thiadiazole derivative, bis-succinimide and polymethylsilicone oil into a container according to a certain weight percentage, and stirring for 15-30min at the temperature of 70-90 ℃;

the trimethylolpropane ester used has a viscosity of 14mm at 40 DEG C²S, viscosity at 100 ℃ of 3.4mm²The pour point is-66 ℃, the flash point is 235 ℃, and the weight percentage is 93.9873%;

the weight percentage of the used tricresyl phosphate is 2.8 percent;

the weight percentage of the used liquid tolutriazole derivative is 0.08 percent;

the weight percentage of the thiadiazole derivative is 0.03 percent;

the weight percentage of the used bissuccinimide is 0.1 percent;

the weight percentage of the used polymethylsilicone oil is 0.0027 percent;

the heating temperature can be 75-85 deg.C, and stirring time is 20-25 min.

Comparative example 4 (no octylbutyldiphenylamine antioxidant) was 0.518mm in scrub spot diameter at a temperature of 75 deg.C, a load of 20kgf, a rotation rate of 1200r/min, and a time of 60min (FIG. 18), and the scrub spot diameter was larger than 0.432mm for example 2.

As can be seen from the comparison of the comparative example and the example, the tricresyl phosphate antiwear agent, the triphenyl thiophosphate antiwear agent and the octyl butyl diphenylamine antioxidant are synergistic with the components of the invention, and the antioxidant performance and the antifriction antiwear performance have synergistic promotion effect.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.