CN108085095B - Pure electric vehicle motor bearing long-life antifriction energy-saving lubricating grease and preparation method thereof - Google Patents

Pure electric vehicle motor bearing long-life antifriction energy-saving lubricating grease and preparation method thereof Download PDF

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CN108085095B
CN108085095B CN201711384877.5A CN201711384877A CN108085095B CN 108085095 B CN108085095 B CN 108085095B CN 201711384877 A CN201711384877 A CN 201711384877A CN 108085095 B CN108085095 B CN 108085095B
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electric vehicle
pure electric
lubricating grease
life
motor bearing
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CN108085095A (en
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冯克权
杨庆超
王秀东
董慧美
张敏达
王春艳
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Shandong North Zite Special Oil Co ltd
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    • C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2213/06—Perfluoro polymers
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    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
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    • C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
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Abstract

The invention relates to a pure electric vehicle motor bearing long-life antifriction energy-saving lubricating grease and a preparation method thereof, wherein the pure electric vehicle motor bearing long-life antifriction energy-saving lubricating grease comprises the following raw materials in percentage by mass: base oil: 70-93%; ternary composite thickening agent: 5 to 20 percent; antioxidant: 0.1-5%; rust-proof anticorrosive agent: 0.1-5%; structure stabilizer: 1 to 5 percent. The invention changes the low-temperature service performance of the lubricating grease, prolongs the service life, greatly reduces the coefficient of friction and saves electric energy. Under the condition of the same electric energy storage quantity, the travel mileage of the pure electric vehicle is prolonged; the service life of the motor bearing of the pure electric vehicle is prolonged, the use and maintenance cost of the pure electric vehicle is reduced, the high-low temperature performance, the colloid stability and the like of the lubricating grease are improved, three wastes are not generated, and the method is safe and environment-friendly.

Description

Pure electric vehicle motor bearing long-life antifriction energy-saving lubricating grease and preparation method thereof
Technical Field
The invention relates to the field of lubricants, in particular to a long-life antifriction energy-saving lubricating grease for a motor bearing of a pure electric vehicle and a preparation method thereof.
Background
Pure electric vehicles have become a necessary trend in the development of the automotive industry. Since the 'eighty-five' country, a lot of achievements have been made in the aspects of system design and development of electric cars, electric buses and electric vehicles, development of subsystems and parts, energy storage devices, demonstration operation, standard formulation, policy research and the like. The statistics of the middle-automobile coordination show that 33.11 thousands of electric automobiles are sold in China in 2015, 2016 sales is expected to reach 70 thousands, and the reserves reach 500 thousands in 2020. The main power of the electric automobile comes from an electric driving system, and the core equipment of the electric automobile is an electric motor. Because the electric quantity of the electric automobile is fixed, the driving mileage of the electric automobile is directly influenced by the energy consumption of the motor of the electric automobile. The reason for influencing the motor efficiency of the electric vehicle is that besides the hardware conditions such as the material and the structure of the motor, the used lubricating grease is also one of the important factors influencing the energy consumption of the motor.
However, in sharp contrast to the development of pure electric vehicles, no research report about the special lubricating grease for the motor bearing of the pure electric vehicle has been found at home and abroad so far, and no research report about the special long-life energy-saving lubricating grease for the motor bearing of the electric vehicle has been found yet. At present, pure electric vehicle manufacturers mainly use common bearing grease and have no lubricating grease use specification, so that the defects of short service life of a motor bearing, high lubricating grease consumption, high energy consumption and the like are caused. In addition, the universal lithium-based lubricating grease or the extreme pressure lithium-based lubricating grease which is commonly used at present is produced by mineral base oil, the lowest use temperature can only reach more than-20 ℃, and the use requirements of northern cold regions and severe cold regions in China cannot be met.
Disclosure of Invention
The invention aims to provide the pure electric vehicle motor bearing long-life antifriction energy-saving lubricating grease and the preparation method thereof, which change the low-temperature service performance of the lubricating grease, prolong the service life, greatly reduce the friction coefficient and save the electric energy. Under the condition of the same electric energy storage quantity, the travel mileage of the pure electric vehicle is prolonged; the service life of the motor bearing of the pure electric vehicle is prolonged, the use and maintenance cost of the pure electric vehicle is reduced, the high-low temperature performance, the colloid stability and the like of the lubricating grease are improved, three wastes are not generated, and the method is safe and environment-friendly.
The invention relates to a long-life antifriction energy-saving lubricating grease for a motor bearing of a pure electric vehicle, which comprises the following raw materials in percentage by mass:
base oil: 70 to 93 percent
Ternary composite thickening agent: 5 to 20 percent of
Antioxidant: 0.1 to 5 percent
Rust-proof anticorrosive agent: 0.1 to 5 percent
Structure stabilizer: 1 to 5 percent.
The kinematic viscosity at 100 ℃ of the base oil is: 3-10mm2/s。
The base oil is a synthetic base oil.
The synthetic base oil is one or more of ester oil, polyolefin or alkyl naphthalene.
The ester oil comprises one or more of pentaerythritol ester, trimethylolpropane ester, dibasic acid ester or benzene polyacid ester.
The benzene polyacid ester is preferably isotridecyl trimellitate.
The ternary composite thickening agent is a mixture of 12-hydroxy lithium stearate, polyurea powder and polytetrafluoroethylene powder.
The weight percentages of various substances in the ternary composite thickening agent are respectively as follows:
12-hydroxystearic acid: 5 to 50 percent; polyurea powder: 5 to 50 percent; polytetrafluoroethylene powder: 5 to 50 percent.
Wherein the polyurea powder is a reactant of diphenylmethane diisocyanate and primary amine or a mixture of primary amines; the particle size of the polytetrafluoroethylene powder is 10 mu m-50 nm.
The primary amine is alkylamine, cyclohexylamine, aniline, p-toluidine.
The antioxidant is amine type or phenol type antioxidant; the rust-proof corrosion inhibitor is N-oleoyl sarcosine octadecylamine salt and/or benzotriazole; the structure stabilizer is a metaborate ester compound, and has the following structure: (RBO)2)3Wherein R is C1-C18 straight-chain or branched-chain alkane.
The amine-type or phenol-type antioxidant is preferably T531 or T501.
The preparation method of the pure electric vehicle motor bearing long-life antifriction energy-saving lubricating grease comprises the following steps:
(1) adding the base oil and the thickening agent into a reaction kettle, stirring and heating to 160-180 ℃, adding the structure improver, expanding for 2-3 hours at constant temperature, then adding the antioxidant and the antirust anticorrosive agent, and stirring and dissolving.
(2) Transferring the materials into a blending kettle, stirring and cooling to below 120 ℃, stirring and circularly shearing for 1-1.5 hours, and then homogenizing by a high-pressure homogenizer and degassing to obtain a finished product.
The rust-proof anticorrosive agent is a solid rust-proof anticorrosive agent.
The invention has the following advantages:
the product of the invention meets the lubrication requirements of the bearings of the motor of the pure electric vehicle, such as high rotating speed, high temperature, heavy load and extremely low temperature, obviously reduces the friction coefficient of the bearings of the motor, saves electric energy, and prolongs the driving mileage of the pure electric vehicle; the service life of the motor bearing and the lubricating grease is prolonged remarkably, the consumption of the bearing and the lubricating grease is reduced greatly, the use cost of the pure electric vehicle is reduced, and meanwhile, the problems that the existing pure electric vehicle motor bearing is poor in low-temperature performance and cannot be used in cold regions and severe cold regions are solved. Compared with the traditional lubricating grease production, the whole production process has no chemical reaction, no three wastes and cleanness and safety.
Compared with the prior art, the invention has the following beneficial effects:
(1) the synthetic base oil is adopted, so that the low-temperature service performance of the lubricating grease is changed, and the service life is prolonged;
(2) the synergistic effect of the ternary composite thickening agent and the structural stabilizer greatly reduces the friction coefficient and saves electric energy under the condition of not adding extreme pressure anti-wear and anti-friction additives. Under the condition of the same electric energy storage quantity, the travel mileage of the pure electric vehicle can be prolonged;
(3) the service life of the motor bearing of the pure electric vehicle is prolonged by more than 1 time, and the use and maintenance cost of the pure electric vehicle is reduced.
(4) The structural stabilizer solves the problem of structural stability of the ternary composite thickening agent, and improves the high-low temperature performance, the colloid stability and the like of the lubricating grease.
(5) The product contains no sulfur and phosphorus elements, and has no harm to environment and health. Meanwhile, compared with the traditional lubricating grease production process, no chemical reaction occurs in the lubricating grease production process, no three wastes are generated, and the lubricating grease is safe and environment-friendly.
Detailed Description
The present invention is further described with reference to the following examples, it being understood that the preferred examples described herein are intended to illustrate and explain the present invention, and are not intended to limit the scope of the invention.
Example 1
1660kg of ester synthetic base oil (isotridecyl trimellitate), 160kg of lithium 12-hydroxystearate, 60kg of polyurea powder and 40kg of polytetrafluoroethylene powder are added into a reaction kettle, stirred and heated to 160-180 ℃, 62kg of methyl metaborate is added, constant temperature puffing is carried out for 2-3 hours, then 10kg of T531 antioxidant, 6kg of N-oleoyl sarcosine octadecylamine salt and 2kg of benzotriazole are added, stirred and dissolved.
Transferring the materials into a blending kettle, stirring and cooling to below 100 ℃, circularly shearing for 1.5 hours, and then homogenizing by a high-pressure homogenizer and degassing to obtain a finished product.
Examples 2 to 5
The production operation processes of the examples 2-5 are the same as those of the example 1, except that the types and the addition amounts of the base oil, the ternary composite thickener, the antioxidant, the antirust and anticorrosive agent and the structural stabilizer are not used, and the formulation compositions of the examples 2-5 are shown in the table 1.
Table 1 examples 2-5 formulation compositions
Figure BDA0001516412510000031
Figure BDA0001516412510000041
The ester oil is pentaerythritol C8-C10Mixing fatty acid esters, wherein the mixing mass ratio is 5: 5: 5.
comparative example 1 is a commercially available automotive lithium-based grease.
The properties of examples 1-5 are shown in Table 2, together with the comparative example 1.
TABLE 2 analysis of the Properties of examples 1-5 and comparative example 1
Figure BDA0001516412510000042
Therefore, after the structure stabilizer is added, the stability of the lubricating grease is greatly improved, the oil distribution of the steel mesh is reduced, meanwhile, the friction coefficient is reduced by 10-30%, the service life of the bearing is prolonged by more than 1 time, the low-temperature performance is excellent, and the use requirement at the temperature of-35 ℃ can be met.
Although the present invention has been described in detail with reference to the foregoing embodiments, any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (7)

1. The pure electric vehicle motor bearing long-life antifriction energy-saving lubricating grease is characterized by comprising the following raw materials in percentage by mass:
base oil: 70 to 93 percent
Ternary composite thickening agent: 5 to 20 percent of
Antioxidant: 0.1 to 5 percent
Rust-proof anticorrosive agent: 0.1 to 5 percent
Structure stabilizer: 1 to 5 percent;
the ternary composite thickening agent is a mixture of 12-lithium hydroxystearate, polyurea powder and polytetrafluoroethylene powder; the weight percentages of various substances in the ternary composite thickening agent are respectively as follows:
12-hydroxystearic acid: 5 to 50 percent; polyurea powder: 5 to 50 percent; polytetrafluoroethylene powder: 5 to 50 percent;
wherein the polyurea powder is a reactant of diphenylmethane diisocyanate and primary amine or a mixture of primary amines; the particle size of the polytetrafluoroethylene powder is 10 mu m-50 nm;
the structure stabilizer is a metaborate compound with a structure of (RBO)2)3Wherein R is C1-C18 straight-chain or branched alkane.
2. The pure electric vehicle motor bearing long-life antifriction energy-saving lubricating grease of claim 1 is characterized in that the 100 ℃ kinematic viscosity of the base oil is as follows: 3-10mm 2/s.
3. The pure electric vehicle motor bearing long-life antifriction energy-saving lubricating grease of claim 1 is characterized in that: the base oil is a synthetic base oil.
4. A pure electric vehicle motor bearing long-life antifriction energy-saving lubricating grease according to claim 1 or 3, characterized in that the synthetic base oil is one or more of ester oil, polyolefin or alkyl naphthalene.
5. A long-life antifriction energy-saving grease lubricant for bearings of motors of pure electric vehicles according to claim 4, wherein the ester oil comprises one or more of pentaerythritol ester, trimethylolpropane ester, dibasic acid ester or benzene polyacid ester.
6. The pure electric vehicle motor bearing long-life antifriction energy-saving lubricating grease of claim 1 is characterized in that: the antioxidant is amine type or phenol type antioxidant; the rust-proof corrosion inhibitor is N-oleoyl sarcosine octadecylamine salt and/or benzotriazole.
7. A preparation method of the pure electric vehicle motor bearing long-life antifriction energy-saving lubricating grease of claim 1 is characterized by comprising the following steps:
(1) adding the base oil and the ternary composite thickening agent into a reaction kettle, stirring and heating to 160-180 ℃, adding the structure stabilizer, puffing at constant temperature for 2-3 hours, then adding the antioxidant and the antirust anticorrosive agent, and stirring and dissolving;
(2) transferring the materials into a blending kettle, stirring and cooling to below 120 ℃, stirring and circularly shearing for 1-1.5 hours, and then homogenizing by a high-pressure homogenizer and degassing to obtain a finished product.
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CN112522005B (en) * 2019-09-17 2023-04-07 中国石油化工股份有限公司 Lubricating grease composition for electric automobile driving motor and preparation method thereof
CN110747039A (en) * 2019-09-19 2020-02-04 清研高装科技(天津)有限公司 Lubricating grease and application thereof in hub bearing of electric automobile

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