CN113355148B - Lubricant for automobile driving shaft hub bearing joint surface and preparation method thereof - Google Patents
Lubricant for automobile driving shaft hub bearing joint surface and preparation method thereof Download PDFInfo
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- CN113355148B CN113355148B CN202110594802.XA CN202110594802A CN113355148B CN 113355148 B CN113355148 B CN 113355148B CN 202110594802 A CN202110594802 A CN 202110594802A CN 113355148 B CN113355148 B CN 113355148B
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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
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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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
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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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/065—Sulfides; Selenides; Tellurides
- C10M2201/066—Molybdenum sulfide
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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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/085—Phosphorus oxides, acids or salts
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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
- C10M2203/106—Naphthenic fractions
- C10M2203/1065—Naphthenic 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
- C10M2205/0206—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers 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
- C10M2205/04—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing aromatic monomers, e.g. styrene
- C10M2205/046—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing aromatic monomers, e.g. styrene used as thickening agents
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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
- C10M2205/06—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing conjugated dienes
- C10M2205/066—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing conjugated dienes used as thickening agents
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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
- C10M2205/16—Paraffin waxes; Petrolatum, e.g. slack wax
- C10M2205/163—Paraffin waxes; Petrolatum, e.g. slack wax 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
- 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
- C10N2030/08—Resistance to extreme temperature
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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
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/02—Bearings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Abstract
The invention relates to the technical field of lubricants, in particular to a lubricant for a hub bearing joint surface of an automobile driving shaft and a preparation method thereof. The lubricant comprises 40-60 parts of base oil, 5-10 parts of thickening agent, 40-60 parts of solid lubricant and 0.5-2.0 parts of antioxidant. Through compatibility tests of raw material types and addition amounts in a product formula, the finally provided lubricant composition has outstanding bearing capacity, wear resistance and low friction coefficient, can effectively solve the problem of abnormal sound of a combining surface of a hub bearing of an automobile driving shaft, obviously reduces abrasion, has a use temperature range of-40-200 ℃, has good lubricating characteristics under high and low temperature conditions, and can provide good lubricating and protecting performance for use parts.
Description
Technical Field
The invention relates to the technical field of lubricants, in particular to a lubricant for a hub bearing joint surface of an automobile driving shaft and a preparation method thereof.
Background
The automobile driving shaft is a shaft connecting the differential mechanism and the driving wheel and is used for transmitting torque between the speed reducer of the gearbox and the driving wheel, and the inner end and the outer end of the automobile driving shaft are respectively provided with a universal joint which is respectively connected with the gear of the speed reducer and the inner ring of the hub bearing through a spline on the universal joint. In the driving process of the automobile, the driving shaft and the hub bearing move relatively to bear larger axial force and torque, so that the problems of abnormal sound, abrasion, blocking and the like are easily caused. Such problems occur mainly due to lubrication failure, which is mainly caused by the following categories: 1. the abrasion resistance of the lubricant is poor, so that the end surfaces of the driving shaft and the hub are seriously abraded; 2. the bearing capacity of the lubricant is insufficient, abrasive grains are formed on a friction interface under impact load, and the abrasion phenomenon occurs; 3. the friction coefficient performance of the lubricant is poor, and instantaneous sliding occurs in the relative motion of the driving shaft and the hub bearing, so that abnormal sound and abrasion are caused; 4. the grease has poor oxidation resistance and is easy to shorten the service life of a driving shaft and a hub bearing.
Disclosure of Invention
In order to solve the technical problem, the invention provides a lubricant for a hub bearing joint surface of an automobile driving shaft and a preparation method thereof.
Specifically, the invention firstly provides a lubricant composition (a lubricant for a hub bearing combination surface of an automobile driving shaft), which comprises the following components in parts by weight:
the base oil is PAO synthetic oil or a mixture of the PAO synthetic oil and at least one of paraffin-base mineral oil and naphthenic-base mineral oil, and the mass percentage content of the PAO synthetic oil in the base oil is more than or equal to 60%; the kinematic viscosity of the base oil at 40 ℃ is 48-160 mm 2 /s；
The thickening agent is thermoplastic styrene butadiene rubber with a linear structure, and the molecular mass of the thickening agent is 9-11 ten thousand;
the solid lubricant is a mixture of molybdenum disulfide, aluminum phosphate, zinc pyrophosphate, hydroxyapatite and zinc oxide in a mass ratio of 1.6-0.8.
Through a great deal of research, the invention discovers that when the kinematic viscosity of the base oil is controlled to be 48-160 mm according to the scheme 2 And/s, when thermoplastic styrene-butadiene rubber is used as a thickening agent and a compound mixture of molybdenum disulfide, aluminum phosphate, zinc pyrophosphate, hydroxyapatite and zinc oxide is used as a solid lubricant additive, the prepared lubricating grease has outstanding bearing energyThe friction-resistant composite material has the advantages of force, wear resistance and low friction coefficient, can effectively solve the problem of abnormal sound of the combining surface of the hub bearing of the automobile driving shaft, obviously reduces abrasion, has a service temperature range of-40-200 ℃, has good lubricating property under high and low temperature conditions, and can provide good lubricating and protecting performance for the service parts.
In the lubricant composition of the present invention, the PAO synthetic oil has excellent low-temperature fluidity, low volatility, higher kinematic viscosity index, while having better anti-wear properties and higher energy efficiency. The paraffin-based mineral oil and the naphthenic mineral oil have excellent lubricity and additive sensitivity. The thermoplastic styrene-butadiene rubber with a linear structure has excellent thickening capacity, can be used as a skeleton structure of a lubricant, can keep the stable structure of the lubricant, and has better binding capacity on base oil. The compounded solid lubricant can effectively improve the load resistance, the abrasion resistance, the friction coefficient reduction and other performances of the lubricating grease.
Aiming at the specific performance required by the bearing joint surface of the hub of the driving shaft of the automobile, the selection and the dosage of each component are further optimized, and the following preferred scheme is obtained.
Preferably, the PAO synthetic oil has a kinematic viscosity of 48-160 mm at 40 DEG C 2 The condensation point is not higher than-45 ℃; the kinematic viscosity of the paraffin-based mineral oil and the naphthenic base mineral oil at 40 ℃ is 48-160 mm 2 And/s, the condensation point is not higher than-20 ℃.
More preferably, the kinematic viscosity of the base oil at 40 ℃ is 68 to 160mm 2 (ii)/s, a solidifying point of not higher than-45 ℃ and a kinematic viscosity index of not less than 110, more preferably not less than 120.
Preferably, the molecular weight of the thermoplastic styrene-butadiene rubber is 9 to 11 ten thousand.
Preferably, the average particle size of the molybdenum disulfide is 0.65-0.80 um, the average particle size of the aluminum phosphate is 3.0-5.0 um, the average particle size of the zinc pyrophosphate is 3.0-5.0 um, the average particle size of the hydroxyapatite is 200-300 nm, and the average particle size of the zinc oxide is 50-100 nm.
More preferably, the mass ratio of the molybdenum disulfide, the aluminum phosphate, the zinc pyrophosphate, the hydroxyapatite and the zinc oxide is 1.
More preferably, the solid lubricant is present in the lubricating oil composition in an amount of 45 to 55% by mass, and still more preferably 50% by mass.
Preferably, the antioxidant is amine antioxidant and/or phenol antioxidant; the amine antioxidant is selected from one or two of alkylated diphenylamine, naphthylamine and p-phenylenediamine; the phenolic antioxidant is 2,6-di-tert-butyl-p-cresol or alpha-naphthol.
More preferably, the antioxidant is a mixture of 1:0.8 to 1.2 of 2,6-di-tert-butyl-p-cresol and alkylated diphenylamine.
The preferred embodiments described above can be combined by one skilled in the art to arrive at preferred embodiments for the lubricant compositions of the present invention, as is conventionally understood.
The invention further provides a method for preparing the lubricant composition, which comprises the following steps:
mixing base oil and a thickening agent at 130-150 ℃, adding a solid lubricant and an antioxidant after the thickening agent is melted, mixing, cooling to below 80 ℃, and rolling.
In a preferred embodiment, the preparation process is as follows:
adding base oil and a thickening agent into a mixing and reacting kettle, heating to 130-150 ℃, stirring for 30-45 minutes, adding a solid lubricant and an antioxidant after the thickening agent is melted, stirring for 60-90 minutes, and cooling to below 80 ℃ for 3-4 times of three-roller oil rolling.
The invention further provides application of the lubricant composition in the junction surface of the hub bearing of the automobile driving shaft.
Based on the scheme, the invention has the following beneficial effects:
through compatibility tests of raw material types and addition amounts in a product formula, the finally provided lubricant composition has outstanding bearing capacity, wear resistance and low friction coefficient, can effectively solve the problem of abnormal sound of a combining surface of a hub bearing of an automobile driving shaft, obviously reduces abrasion, has a use temperature range of-40-200 ℃, has good lubricating characteristics under high and low temperature conditions, and can provide good lubricating and protecting performance for use parts.
The lubricant for the joint surface of the hub bearing of the automobile driving shaft passes the abnormal sound bench test of a host manufacturer, and the lubricating performance requirements of the joint surface of the hub bearing of the automobile driving shaft in all aspects are met from the test result.
Detailed Description
The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
The thickeners used in the examples below are thermoplastic styrene-butadiene rubbers of linear structure and have a molecular mass of from 9 to 11 ten thousand.
The PAO synthetic oils used in the following examples had a set point no higher than-45 deg.C, and the paraffin-based and naphthenic mineral oils had a set point no higher than-20 deg.C. The "%" mentioned in the base oil is "mass percent content".
The examples do not show the specific techniques or conditions, according to the technical or conditions described in the literature in the field, or according to the product specifications. The reagents or instruments used are conventional products available from regular distributors, not indicated by the manufacturer.
Example 1
The embodiment provides a lubricant composition for a joint surface of a hub bearing of an automobile driving shaft, which comprises the following components in percentage by weight:
thickening agent: 50g; base oil: 400g (PAO synthetic oil: 100%, base oil kinematic viscosity at 40 ℃ 50 mm) 2 (ii)/s, kinematic viscosity index of 127); solid lubricant: 158g of molybdenum disulfide, 116g of aluminum phosphate, 107g of zinc pyrophosphate, 111g of hydroxyapatite and 53g of zinc oxide; antioxidant: 5g of diphenylamine.
This example further provides a method for preparing the lubricant composition described above, specifically as follows:
adding the base oil and the thickening agent into a mixing and reacting kettle, heating to 130 ℃, stirring for 30 minutes, adding the solid lubricant and the antioxidant after the thickening agent is melted, stirring for 90 minutes, and cooling to below 80 ℃ to roll the oil for 4 times by a three-roller machine.
Example 2
The embodiment provides a lubricant composition for a joint surface of a hub bearing of an automobile driving shaft, which comprises the following components in percentage by weight:
thickening agent: 75g of the total weight of the mixture; base oil: 456g (PAO synthetic oil: 100%, base oil kinematic viscosity at 40 ℃ C.: 70 mm) 2 (ii)/s, kinematic viscosity index 125; solid lubricant: 126g of molybdenum disulfide, 100g of aluminum phosphate, 88g of zinc pyrophosphate, 100g of hydroxyapatite and 50g of zinc oxide; antioxidant: 2,6-di-tert-butyl-p-cresol 5g.
This example further provides a method for preparing the lubricant composition described above, specifically as follows:
adding the base oil and the thickening agent into a blending reactor, heating to 140 ℃, stirring for 40 minutes, adding the solid lubricant and the antioxidant after the thickening agent is melted, stirring for 90 minutes, and cooling to below 80 ℃ for rolling for 4 times by a three-roller machine.
Example 3
The embodiment provides a lubricant composition for a joint surface of a hub bearing of an automobile driving shaft, which comprises the following components in percentage by weight:
thickening agent: 100g of the total weight of the mixture; base oil: 487g (PAO synthetic oil: 100%, base oil kinematic viscosity at 40 ℃ C.: 70 mm) 2 (iv)/s, kinematic viscosity index of 125; solid lubricant: 130g of molybdenum disulfide, 91g of aluminum phosphate, 78g of zinc pyrophosphate, 78g of hydroxyapatite and 26g of zinc oxide; antioxidant: 10g of diphenylamine.
This example further provides a method for preparing the lubricant composition described above, specifically as follows:
adding base oil and a thickening agent into a mixing and reacting kettle, heating to 150 ℃, stirring for 45 minutes, adding a solid lubricant and an antioxidant after the thickening agent is melted, stirring for 90 minutes, and cooling to below 80 ℃ to roll oil for 3 times by a three-roller machine.
Example 4
The embodiment provides a lubricant composition for a joint surface of a hub bearing of an automobile driving shaft, which comprises the following components in percentage by weight:
thickening agent: 75g of the total weight of the mixture; base oil: 448g (PAO synthetic oil: 100%,kinematic viscosity of base oil at 40 ℃:100mm 2 (ii)/s, kinematic viscosity index 130; solid lubricant: 140g of molybdenum disulfide, 105g of aluminum phosphate, 90g of zinc pyrophosphate, 90g of hydroxyapatite and 42g of zinc oxide; antioxidant: 2,6-di-tert-butyl-p-cresol 5g and alkylated diphenylamine 5g.
This example further provides a method for preparing the lubricant composition described above, specifically as follows:
adding the base oil and the thickening agent into a blending reactor, heating to 140 ℃, stirring for 45 minutes, adding the solid lubricant and the antioxidant after the thickening agent is melted, stirring for 90 minutes, and cooling to below 80 ℃ for rolling for 4 times by a three-roller machine.
Example 5
The embodiment provides a lubricant composition for a joint surface of a hub bearing of an automobile driving shaft, which comprises the following components in percentage by weight:
thickening agent: 90g of the total weight of the mixture; base oil: 475g (PAO synthetic oil: 60%, paraffin-based mineral oil 40%, base oil kinematic viscosity at 40 ℃ 160 mm) 2 (iv)/s, kinematic viscosity index of 115; solid lubricant: 123g of molybdenum disulfide, 92g of aluminum phosphate, 82g of zinc pyrophosphate, 88g of hydroxyapatite and 40g of zinc oxide; antioxidant: 2,6-di-tert-butyl-p-cresol 5g and alkylated diphenylamine 5g.
This example further provides a method for preparing the lubricant composition described above, specifically as follows:
adding the base oil and the thickening agent into a blending reactor, heating to 140 ℃, stirring for 40 minutes, adding the solid lubricant and the antioxidant after the thickening agent is melted, stirring for 80 minutes, and cooling to below 80 ℃ to roll the oil for 4 times by a three-roller machine.
Example 6
The embodiment provides a lubricant composition for a joint surface of a hub bearing of an automobile driving shaft, which comprises the following components in percentage by weight:
thickening agent: 60g of the total weight of the mixture; base oil: 467g (PAO synthetic oil: 60%, naphthenic mineral oil 40%, base oil 40 ℃ kinematic viscosity: 130 mm) 2 (ii)/s, kinematic viscosity index of 110; solid lubricant: 135g of molybdenum disulfide, 100g of aluminum phosphate, 83g of zinc pyrophosphate, 85g of hydroxyapatite and 50g of zinc oxide; antioxidant: 2,6-di-tert-butyl-p-cresol 10g, alkyl10g of diphenylamine.
This example further provides a method for preparing the lubricant composition described above, specifically as follows:
adding the base oil and the thickening agent into a blending reactor, heating to 140 ℃, stirring for 45 minutes, adding the solid lubricant and the antioxidant after the thickening agent is melted, stirring for 90 minutes, and cooling to below 80 ℃ for rolling for 4 times by a three-roller machine.
Comparative example 1
This comparative example provides a lubricant composition for a joint surface of a hub bearing for a drive shaft of an automobile, which is different from example 5 in the composition of the solid lubricant. Specifically, the composition of the solid lubricant in this comparative example was as follows: graphite: 135g of the total weight of the mixture; 100g of PTFE; MCA 100g; 80g of calcium carbonate.
The preparation method of the lubricant composition for the joint surface of the hub bearing of the automobile driving shaft is the same as that of example 1.
Comparative example 2
This comparative example provides an automotive driveshaft hub bearing bonded face lubricant composition, differing from example 5 in that the thickener is different, and the thickener in this comparative example is a propylene-ethylene random copolymer.
The preparation method of the lubricant composition for the joint surface of the hub bearing of the automobile driving shaft is the same as that of example 1.
Comparative example 3
Comparative example 3 is a commercially available lubricant for a joint surface of a hub bearing of an automobile drive shaft, which is mainly composed of 40 to 60% of solvent refined paraffin-based mineral, 15 to 35% of molybdenum disulfide, 10 to 30% of zinc pyrophosphate, 10 to 30% of calcium hydroxy phosphate, 1 to 5% of ethylene bis stearamide, 1.0 to 5.0% of aluminum phosphate, and 0 to 1.5% of silica, according to MSDS of the product.
Test examples
The lubricant compositions of examples 1-6 and comparative examples 1-3 were evaluated for low temperature startability, antiwear properties, load resistance, lubricity, antifriction properties, and abnormal sound durability bench test.
The evaluation method of each performance is as follows:
1. the low-temperature startability is judged by the low-temperature torque of the lubricating grease under the environment of-30 ℃;
2. abrasion resistance was evaluated by a four ball machine test;
3. the load resistance was assessed by a timken test;
4. lubricity and friction reduction were evaluated by an SRV high frequency linear vibrator;
5. test of the automobile drive shaft hub bearing combination surface lubricant abnormal sound bench.
The specific test results are shown in table 1 below.
TABLE 1
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. The lubricant composition is characterized by comprising the following components in parts by weight:
40-60 parts of base oil,
5 to 10 portions of thickening agent, 5 to 10 portions of,
40-60 parts of a solid lubricant,
0.5 to 2.0 parts of antioxidant;
the base oil is PAO synthetic oil or a mixture of the PAO synthetic oil and at least one of paraffin-base mineral oil and naphthenic base mineral oil, and the kinematic viscosity of the base oil at 40 ℃ is 48-160 mm 2 The condensation point is not higher than-45 ℃, and the kinematic viscosity index is not less than 110;
the mass percentage content of the PAO synthetic oil in the base oil is more than or equal to 60 percent;
the thickening agent is thermoplastic styrene-butadiene rubber with a linear structure and a molecular mass of 9-11 ten thousand;
the solid lubricant is a mixture of molybdenum disulfide, aluminum phosphate, zinc pyrophosphate, hydroxyapatite and zinc oxide in a mass ratio of 1.6-0.8.
2. The lubricant composition of claim 1, wherein the PAO synthetic oil has a kinematic viscosity at 40 ℃ of 48 to 160mm 2 The condensation point is not higher than-45 ℃; the kinematic viscosity of the paraffin-based mineral oil and the naphthenic base mineral oil at 40 ℃ is 48-160 mm 2 And/s, the condensation point is not higher than-20 ℃.
3. The lubricant composition of claim 1 or 2, wherein the molybdenum disulfide has an average particle size of 0.65 to 0.80 μm, the aluminum phosphate has an average particle size of 3.0 to 5.0 μm, the zinc pyrophosphate has an average particle size of 3.0 to 5.0 μm, the hydroxyapatite has an average particle size of 200 to 300nm, and the zinc oxide has an average particle size of 50 to 100nm.
4. The lubricant composition according to claim 1 or 2, wherein the mass ratio of the molybdenum disulfide, the aluminum phosphate, the zinc pyrophosphate, the hydroxyapatite and the zinc oxide is 1.
5. The lubricant composition according to claim 3, wherein the mass ratio of the molybdenum disulfide, the aluminum phosphate, the zinc pyrophosphate, the hydroxyapatite and the zinc oxide is 1.
6. The lubricant composition according to any of claims 1, 2, 5, wherein the antioxidant is an aminic antioxidant and/or a phenolic antioxidant; the amine antioxidant is selected from one or two of alkylated diphenylamine, naphthylamine and p-phenylenediamine; the phenolic antioxidant is 2,6-di-tert-butyl-p-cresol or alpha-naphthol.
7. The lubricant composition of claim 3, wherein the antioxidant is an aminic antioxidant and/or a phenolic antioxidant; the amine antioxidant is selected from one or two of alkylated diphenylamine, naphthylamine and p-phenylenediamine; the phenolic antioxidant is 2,6-di-tert-butyl-p-cresol or alpha-naphthol.
8. The lubricant composition of claim 6, wherein the antioxidant is present in a mass ratio of 1:0.8 to 1.2 of 2,6-di-tert-butyl-p-cresol and alkylated diphenylamine.
9. The method of making the lubricant composition of any one of claims 1~8 comprising:
mixing the base oil and the thickening agent at 130-150 ℃, adding the solid lubricant and the antioxidant after the thickening agent is melted, mixing, cooling to below 80 ℃, and rolling.
10. Use of the lubricant composition of any one of claims 1~8 in an automotive driveshaft hub bearing faying surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110594802.XA CN113355148B (en) | 2021-05-28 | 2021-05-28 | Lubricant for automobile driving shaft hub bearing joint surface and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110594802.XA CN113355148B (en) | 2021-05-28 | 2021-05-28 | Lubricant for automobile driving shaft hub bearing joint surface and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN113355148A CN113355148A (en) | 2021-09-07 |
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