CN107828481B - Lubricating oil composition for electric automobile gearbox and preparation method thereof - Google Patents
Lubricating oil composition for electric automobile gearbox and preparation method thereof Download PDFInfo
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- CN107828481B CN107828481B CN201711038962.6A CN201711038962A CN107828481B CN 107828481 B CN107828481 B CN 107828481B CN 201711038962 A CN201711038962 A CN 201711038962A CN 107828481 B CN107828481 B CN 107828481B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
- C10M169/044—Mixtures of base-materials and additives the additives being a mixture of non-macromolecular and macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
- C10M169/048—Mixtures of base-materials and additives the additives being a mixture of compounds of unknown or incompletely defined constitution, non-macromolecular and macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/102—Aliphatic fractions
- C10M2203/1025—Aliphatic fractions used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
- C10M2205/0285—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/02—Pour-point; Viscosity index
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/04—Detergent property or dispersant property
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/68—Shear stability
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/02—Bearings
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
- C10N2040/044—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives for manual transmissions
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
The invention discloses a lubricating oil composition for an electric automobile gearbox and a preparation method thereof, wherein the composition comprises the following components in percentage by weight: 79.8-84.5% of base oil, 4-7% of polymethacrylate adhesive, 10-13% of special complexing agent for gearbox oil and 0.3-0.5% of pour point depressant; wherein, the polymethacrylate adhesive is a comb-shaped polymer, and the shear stability index of the adhesive KRL 20h is not more than 28. The invention has the advantages that the viscosity of the prepared oil product is kept unchanged under the action of long-term high-speed shearing force, and reliable protection is provided for the gearbox of the electric automobile; the oil has excellent shear stability, excellent low-temperature rheological property, high-temperature thickening capability greatly improved under a lower dosage, good dispersibility, capability of reducing the deposition of oil oxides, and capability of improving the cleaning and dispersing performance of the oil by matching with a special complexing agent for a gearbox.
Description
Technical Field
The invention belongs to the field of lubricating oil, and particularly relates to a lubricating oil composition for an electric automobile gearbox and a preparation method thereof.
Background
The electric automobile industry is a new industry in rapid development, the development degrees at home and abroad are different, the industry development is not mature and standardized, the technology is continuously seeking improvement and breakthrough, and the related policies are also adjusted. Electric vehicles may be classified into conventional (oil/gas/electricity) hybrid vehicles (HEV), plug-in hybrid vehicles (PHEV), pure electric vehicles (AEV), and Fuel Cell Vehicles (FCV) according to the difference of technical routes. The electric automobile becomes the inevitable trend of automobile industry development in China and is also the main direction of automobile industry transformation and development in the future.
The electric automobile mainly comprises an electric driving and controlling system, a mechanical system such as driving force transmission and the like, a working device for completing a set task and the like. The electric drive and control system is the core of an electric automobile and is the biggest difference from an internal combustion engine automobile. In an electric vehicle, since the rotation speed of an electric motor is not equal to the rotation speed of wheels during driving, the electric vehicle generally needs to be provided with a single-gear transmission, also called a reducer. The use of a single-gear transmission results in a speed increase that is not possible to maintain the electric motor in a relatively efficient operating range using different gear ratios of the transmission as in an internal combustion engine. In view of this, manufacturers have developed electric vehicle transmissions with two gears. Even manufacturers have developed three-gear and four-gear electric automobile gearboxes. After the electric vehicle uses the multi-gear gearbox, the problem of fatigue caused by acceleration at medium and high speed is solved, and the motor can be maintained in a relatively efficient working condition so as to improve the endurance mileage and reduce the power consumption. Different from the traditional gearbox, the electric automobile gearbox has higher input rotating speed, some of which are as high as more than 10000r/min, and the input torque is large, so that the oil product is required to have excellent anti-shearing stability and extreme pressure anti-wear property. For a multi-gear electric automobile gearbox, a synchronizer is arranged, and the corrosion-resistant pitting protection and the friction characteristic of an oil product on the synchronizer need to be considered. In an electric vehicle transmission system, some motors and mechanical transmission parts share one set of lubricating system, and the lubricating and cooling requirements on the mechanical transmission parts are met simultaneously, so that the oil for the electric vehicle transmission system is required to have good insulating property, and the copper protection and oxidation performance of the oil are enhanced. In addition, in consideration of the power transmission efficiency, energy loss and the heat dissipation and cooling functions of the electric automobile on the motor, the viscosity of the oil for the transmission system is required to be low, and meanwhile, good high-temperature oxidation resistance is also ensured, and the oil can meet the use temperature requirement of minus 40-140 ℃.
From the particularity of the transmission system of the electric automobile and the high requirements on oil products, the traditional gearbox oil can not meet the requirements, so that a special gearbox oil for the electric automobile needs to be developed by adopting a specific formula technology to meet the requirement of the electric automobile on the gearbox oil and the protection of the transmission system. At present, few domestic and foreign published reports on lubricating oil for electric automobile gearboxes are provided, and CN 105132107A, CN104560297A and CN 105087113A both introduce a lubricating oil composition for electric automobile gearboxes or transmission systems, wherein CN 105132107A and CN104560297A mainly aim at single-stage gearboxes and cannot meet the requirements of two-stage or multi-stage gearboxes. The oil reported in CN 105087113A has good antiwear and antifriction properties, oxidation stability and the like, but can not provide good extreme pressure gear protection and viscosity retentivity of the oil for a gearbox with large input torque and high rotating speed. Furthermore, none of the above patents relate to oil compatibility with seals, low temperature rheology and electrodynamic electromagnetic. Therefore, further improvement on the existing product technology is needed to provide special oil for the electric automobile gearbox with more excellent performance, so as to meet the development requirements of the future electric automobile gearbox technology.
Disclosure of Invention
The purpose of the invention is as follows: a first object of the present invention is to provide a lubricating oil composition for an electric automobile transmission, which has excellent thermal oxidation stability, excellent extreme pressure protection and pitting corrosion resistance for bearings and gears, a reliable and stable friction coefficient and friction durability, and electromagnetic compatibility with sealing materials, motors; it is a second object of the present invention to provide a method for preparing the lubricating oil composition.
The technical scheme is as follows: a lubricating oil composition for an electric automobile gearbox comprises the following components in percentage by weight: 79.8-84.5% of base oil, 4-7% of polymethacrylate adhesive, 10-13% of special complexing agent for gearbox oil and 0.3-0.5% of pour point depressant; wherein, the polymethacrylate adhesive is a comb-shaped polymer, and the shear stability index of KRL 20h of the adhesive is not more than 28.
In order to ensure that the viscosity of the oil product is kept unchanged under the action of long-term high-speed shearing force, the polymethacrylate adhesive is selected from at least one of Viscoplex 0-051, Viscoplex 12-075 and Viscoplex 12-095.
The special compound agent for the transmission oil is HITEC 2468 of the Yaofuton company or Infineum T4311 of the RunYinglian company, so that the oil product is ensured to have excellent thermal oxidation stability, excellent extreme pressure protection and pitting corrosion resistance of a bearing and a gear, reliable and stable friction coefficient and friction durability, electromagnetic compatibility with a sealing material and a motor and the like.
The base oil adopted by the invention is at least one of III-type hydrogenated base oil and poly alpha-olefin base oil; wherein the group III hydrogenated base oil is at least one of 70N, 100N and 150N, GTL 100; the poly alpha olefin base oil is at least one of PAO4 and PAO 6.
The pour point depressant adopted by the invention is polymethacrylate; preferably, the polymethacrylate is at least one of Viscoplex 1-248 and Viscoplex 1-300.
The lubricating oil composition for the electric automobile gearbox, which is prepared by the invention, has the kinematic viscosity of 6.0-8.0 mm at 100 DEG C2And/s, and the reduction rate of the kinematic viscosity at 100 ℃ of the oil product after 20 hours of KRL shearing is not more than 5%.
The method for preparing the lubricating oil composition for the electric automobile gearbox comprises the following steps: mixing the raw materials according to the mass percentage to obtain the product.
Has the advantages that: compared with the prior art, the invention has the advantages that: (1) the polymethacrylate adhesive with ultrahigh KRL shearing stability is adopted, so that the viscosity of an oil product is kept unchanged under the action of long-term high-speed shearing force, and reliable protection is provided for an electric automobile gearbox; meanwhile, the polymethacrylate adhesive with the comb-shaped structure is specially used for gearbox oil, has excellent shear stability, excellent low-temperature rheological property and capability of greatly improving the high-temperature thickening capability of oil products under a lower dosage, has good dispersibility, can reduce the deposition of oil products, and is matched with a special complexing agent for a gearbox to improve the cleaning and dispersing performance of the oil products. (2) The special compound agent for the transmission oil is selected and contains various high-efficiency additives such as a detergent dispersant, an antioxidant corrosion inhibitor, an extreme pressure agent, a friction modifier and the like, so that the oil product is ensured to have excellent thermal oxidation stability, excellent extreme pressure protection and pitting corrosion protection for bearings and gears, reliable and stable friction coefficient and friction durability, electromagnetic compatibility with sealing materials and motors and the like. (3) The prepared lubricating oil composition for the electric automobile gearbox has low viscosity, the kinematic viscosity at 100 ℃ is less than 8.0cSt, the actual viscosity is about 7.0cSt, and the lubricating oil composition has excellent high-low temperature and shear stability, can meet the lubricating requirement of the electric automobile gearbox under the working condition of-40-140 ℃, helps to improve the power transmission efficiency, reduces the output energy consumption loss of the electric automobile battery, and prolongs the service life of the battery.
Detailed Description
The technical scheme of the invention is further explained below, and the raw materials in the examples are all commercially available unless otherwise specified.
Example 1
The lubricating oil composition for the electric automobile gearbox in the embodiment is prepared by blending the components in percentage by weight in the table 1, and the performance index data of the lubricating oil composition is shown in the table 8.
Table 1 raw material components and weight percentages of example 1
| Components | By weight percent of |
| III hydrogenated base oil 70N | 58.2 |
| Poly alpha olefin base oil PAO6 | 22 |
| Viscoplex 0-051 | 6.5 |
| Compound agent HITEC 2468 | 12.8 |
| Pour point depressant Viscoplex 1-300 | 0.5 |
Example 2
The lubricating oil composition for the electric automobile gearbox in the embodiment is prepared by blending the components in percentage by weight in the table 2, and the performance index data of the lubricating oil composition is shown in the table 8.
Table 2 raw material components and weight percentages of example 2
| Components | By weight percent of |
| III hydrogenated base oil 70N | 30 |
| III hydrogenated base oil 150N | 49.8 |
| Viscoplex 12-075 | 7.0 |
| Compound agent HITEC 2468 | 12.8 |
| Pour point depressant Viscoplex 1-248 | 0.4 |
Example 3
The lubricating oil composition for the electric automobile gearbox in the embodiment is prepared by blending the components in percentage by weight in the table 3, and the performance index data of the lubricating oil composition is shown in the table 8.
Table 3 raw material components and weight percentages of example 3
| Components | By weight percent of |
| III hydrogenated base oil 100N | 27.3 |
| Poly alpha olefin base oil PAO4 | 53 |
| Viscoplex 12-075 | 6.5 |
| Compound agent HITEC 2468 | 12.8 |
| Pour point depressant Viscoplex 1-248 | 0.4 |
Example 4
The lubricating oil composition for the electric automobile gearbox in the embodiment is prepared by blending the components in percentage by weight in the table 4, and the performance index data of the lubricating oil composition is shown in the table 8.
Table 4 raw material components and weight percentages of example 4
Example 5
The lubricating oil composition for the electric automobile gearbox in the embodiment is prepared by blending the components in percentage by weight in the table 5, and the performance index data of the lubricating oil composition is shown in the table 8.
TABLE 5 feed components and weight percents of example 5
| Components | By weight percent of |
| III hydrogenated base oil 70N | 33.7 |
| Poly alpha olefin base oil PAO4 | 50 |
| Viscoplex 12-095 | 6 |
| Complexing agent Infineum T4311 | 10 |
| Pour point depressant Viscoplex 1-300 | 0.3 |
Comparative example 1
This comparative example is a comparative experiment where the shear stability index of the finger adhesive KRL 20h is greater than 28. Wherein, the KRL 20h shear stability index of the adhesive Viscoplex 0-120 is 35, the lubricating oil composition for the electric automobile gearbox is prepared by blending the components with the weight percentage content in the table 6, and the performance index data is shown in the table 8.
TABLE 6 raw material composition and weight percentage of comparative example 1
| Components | By weight percent of |
| III hydrogenated base oil 70N | 58.2 |
| Poly alpha olefin base oil PAO6 | 22 |
| Viscoplex 0-120 | 6.5 |
| Compound agent HITEC 2468 | 12.8 |
| Pour point depressant Viscoplex 1-300 | 0.5 |
Comparative example 2
This comparative example is a comparative experiment where the polymethacrylate adhesive is a star polymer. The structure of the adhesive Viscoplex 6-054 is star polymer, the lubricating oil composition for the electric automobile gearbox is prepared by blending the components with the weight percentage in the table 7, and the performance index data is shown in the table 8.
Table 7 raw material composition and weight percentage of comparative example 2
| Components | By weight percent of |
| III hydrogenated base oil 70N | 57.3 |
| Poly alpha olefin base oil PAO6 | 22 |
| Viscoplex 6-054 | 7.4 |
| Compound agent HITEC 2468 | 12.8 |
| Pour point depressant Viscoplex 1-300 | 0.5 |
TABLE 8 Performance index data for the oils of the examples
As can be seen from the data in Table 8, the lubricating oil for the electric automobile gearbox obtained in the embodiments 1-5 has excellent high and low temperature performance, good low temperature fluidity, brookfield viscosity at-40 ℃ of less than 10000mPa.s, and a reduction rate of kinematic viscosity at 100 ℃ of KRL after shearing for 20h of less than 5%, which indicates that the oil product has excellent shear stability. The FZG bearing capacity exceeds 11 grades, and the FE-8 bearing abrasion and synchronizer test successfully pass, which shows that the oil has better extreme pressure anti-wear performance and synchronizer durability. The shear stability of the finger-sticking agent KRL selected in the comparative example 1 for 20h is more than 28, the viscosity of the oil product is greatly reduced after shearing, and the requirement of high rotating speed of the electric automobile transmission cannot be met; the linear or star polymer adhesive selected in comparative example 2 has not only poor thickening ability but also poor low temperature performance; the polymethacrylate adhesive with the comb-shaped structure is specially used for gearbox oil, has excellent shear stability, excellent low-temperature rheological property and capability of greatly improving the high-temperature thickening capability of oil products under a lower dosage, has good dispersibility, can reduce the deposition of oil products, and is matched with a special complexing agent for a gearbox to improve the cleaning and dispersing performance of the oil products.
The weight percentage of the polymethacrylate adhesive is 4-7%, and if the polymethacrylate adhesive is not in the range, the kinematic viscosity at 100 ℃ cannot meet the requirement; the weight percentage of the special complexing agent for the gearbox oil is 10-13%, and if the weight percentage is lower than 10%, the performance cannot meet the requirement; if it exceeds 13%, the cost is too high to be practically used. The special complexing agent contains various high-efficiency additives such as a clean dispersing agent, an oxidation and corrosion inhibitor, an extreme pressure agent, a friction modifier and the like, and ensures that an oil product has excellent thermal oxidation stability, excellent extreme pressure protection and pitting corrosion resistance of bearings and gears, reliable and stable friction coefficient and friction durability, compatibility with sealing materials and motor electromagnetism and the like.
Therefore, the lubricating oil composition for the electric automobile gearbox has the advantages of excellent high and low temperature resistance and shear stability, excellent bearing and gear protection, stable friction coefficient, good electromagnetic compatibility with sealing materials and motors, excellent power output efficiency for the electric automobile manual gearbox, reduction of energy consumption loss, prolongation of oil change period and service life of the gearbox.
Claims (7)
1. The lubricating oil composition for the electric automobile gearbox is characterized by comprising the following components in percentage by weight: 79.8-84.5% of base oil, 4-7% of polymethacrylate adhesive, 10-13% of special complexing agent for gearbox oil and 0.3-0.5% of pour point depressant; the polymethacrylate adhesive is at least one of Viscoplex 0-051, Viscoplex 12-075 and Viscoplex 12-095, and the special compounding agent for the gearbox oil is HITEC 2468 of Yaofuton company or Infineum T4311 of Ruyinjin company.
2. The lubricating oil composition for electric vehicle transmissions according to claim 1, wherein: the base oil is at least one of group III hydrogenated base oil and poly alpha-olefin base oil.
3. The lubricating oil composition for electric vehicle transmissions according to claim 2, wherein: the group III hydrogenated base oil is at least one of 70N, 100N and 150N.
4. The lubricating oil composition for electric vehicle transmissions according to claim 2, wherein: the poly alpha olefin base oil is at least one of PAO4 and PAO 6.
5. The lubricating oil composition for electric vehicle transmissions according to claim 1, wherein: the pour point depressant is polymethacrylate.
6. The lubricating oil composition for electric vehicle transmissions according to claim 5, wherein: the polymethacrylate is at least one of Viscoplex 1-248 and Viscoplex 1-300.
7. A method for producing the lubricating oil composition for electric automobile transmissions according to claim 1, characterized by: mixing the components according to the weight percentage.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109321337A (en) * | 2018-11-01 | 2019-02-12 | 江苏龙蟠科技股份有限公司 | A kind of engine oil composition and preparation method with low-friction coefficient |
| CN109705959A (en) * | 2019-01-23 | 2019-05-03 | 山东莱克科技有限公司 | A kind of hybrid electric vehicle gearshift case special lube |
| CN111117747A (en) * | 2020-01-13 | 2020-05-08 | 龙蟠润滑新材料（天津）有限公司 | Lubricating oil composition for integrated electric drive assembly speed reducer |
| CN113174285B (en) * | 2021-04-27 | 2022-08-30 | 中国石油化工股份有限公司 | Engine oil composition, preparation method thereof and method for improving energy saving performance and/or bearing abrasion resistance of engine |
| CN114958471A (en) * | 2022-07-01 | 2022-08-30 | 重庆合晶能源科技有限公司 | Motor gearbox oil and preparation method thereof |
| CN115058277A (en) * | 2022-07-04 | 2022-09-16 | 杭州小拇指汽车维修科技股份有限公司 | Lubricating oil composition suitable for automatic gearbox of automobile |
| CN115161097B (en) * | 2022-07-04 | 2023-06-20 | 珠海美合科技股份有限公司 | Preparation method of three-in-one bridge oil for electric automobile |
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| CN101479368A (en) * | 2006-04-24 | 2009-07-08 | 卢布里佐尔公司 | Star polymer lubricating composition |
| US20170137732A1 (en) * | 2014-09-19 | 2017-05-18 | Idemitsu Kosan Co., Ltd. | Lubricating oil composition |
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| CN101479368A (en) * | 2006-04-24 | 2009-07-08 | 卢布里佐尔公司 | Star polymer lubricating composition |
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