CN106867633A - A kind of high-speed railway axle box double-row conical bearing lubricant composition and preparation method - Google Patents
A kind of high-speed railway axle box double-row conical bearing lubricant composition and preparation method Download PDFInfo
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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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- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/121—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms
- C10M2207/122—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms monocarboxylic
- C10M2207/1225—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms monocarboxylic used as thickening agent
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- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
- C10M2207/126—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic
- C10M2207/1265—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic used as thickening agent
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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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/281—Esters of (cyclo)aliphatic monocarboxylic acids
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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
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
- C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
- C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
- C10M2219/066—Thiocarbamic type compounds
- C10M2219/068—Thiocarbamate metal salts
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- 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
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/10—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring
- C10M2219/104—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring containing sulfur and carbon with nitrogen or oxygen in the ring
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/045—Metal containing thio derivatives
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- 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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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
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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
- C10N2030/08—Resistance to extreme temperature
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- 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
- C10N2030/26—Waterproofing or water resistance
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- 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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Abstract
The invention provides a kind of high-speed railway axle box double-row conical bearing lubricant composition and preparation method, thickening agent is made up of the reactant of 12- hydroxy stearic acids, enanthic acid, tetradecanoic acid and monohydrate lithium hydroxide；Additive includes：Sulfoacid calcium, extreme pressure agent, antirust agent, renovation agent and antioxidant.12 hydroxy stearic acids, enanthic acid and sulfoacid calcium are added in base oil, 60~90 DEG C are mixed and heated to, add the monohydrate lithium hydroxide saponification containing tetradecanoic acid compound 1.5~2 hours；185~190 DEG C were warmed up to 2~2.5 hours, this thermostatic 1~1.5 hour；Continue to be warmed up to 220~240 DEG C, then Temperature fall sequentially adds extreme pressure agent, antirust agent, renovation agent and antioxidant to less than 120 DEG C, when canned after three-roller presses oil three times after temperature is reduced to 40~60 DEG C.The lubricating grease is widely used in high-speed railway industry, axle box bearing abrasion is reduced, while can extend that changed the fat cycle.
Description
Technical field
The invention belongs to technical field of lubricating grease, more particularly to high-speed railway double-row conical axle box bearing lubricating grease
Composition and preparation method.
Background technology
Since the first in the world bar railway having been built from Britain in 1825, due to the advantage on travelling speed and transport energy,
Railway communications and transportation as various countries within the period of history very long is key.Since the 1950's, highway and aviation are transported
It is defeated to develop rapidly, make railway that inferior position is occupy in speed, long-distance passenger transportation is squeezed by air transportation, and short-distance passenger transportation is taken by Automobile Transportation
Generation, railway enters the passive situation of " sunset industry ".But enter after 20 century 70s, because energy crisis, environment are disliked
The puzzlement of the problems such as change, traffic safety, people re-recognize the value of railway.Particularly high-speed railway is so that its speed is fast, fortune
Can big, a series of technical advantage such as energy consumption is low, pollution is light, adapted to the new demand of development of modern society economy.
In October, 1964, Japan is in Tokaido the Shinkansen Tokyo to Osaka high-speed railway with 210 kilometers/hour of operations, method
State built first high-speed railway (TGV southeast line) in 1981, and high-speed railway shows vigorous vitality.Because it has
Obvious economic benefit and social benefit, thus many countries and regions such as Europe, North America and Asia build one after another, reconstruct or
High-speed railway is built in planning.By the end of the year 2015, Chinese Railway revenue kilometres have reached 12.1 ten thousand kilometers, and wherein high ferro exceedes
1.9 ten thousand kilometers, more than the 60% of world high ferro operation mileage is accounted for, be most fast, the largest state of Development of High Speed Railway in the world
Family.China turned into that high speed rail system technology in the world is most complete, integration capability is most strong, the most long, speed of service of runing mileage most
The maximum country of high, building scale.
With the high speed of railroad train, bearing as bullet train critical component, its performance and reliability are increasingly
Attract attention.Part manufacturer needs designing new product, further improves the performance of vehicle bearing, constantly expands its service condition
With the scope of environment.The static and dynamic radial direction that train axle box bearing is constituted except the weight of train to be supported and vehicle load
Outside load, extra unsteady force is still suffered from axial direction.It is an important set in running gear due to axle box bearing
Into part, its reliability produces significant impact to the safety in operation of train.Therefore, domestic and international bearing producer especially payes attention to axle box
The structure choice of bearing and manufacture and design.
The train referred to as bullet train that at full throttle 200km/h is operated above, bullet train can be by locomotive traction
The train of car composition, or the train of EMUs composition, referred to as EMU.The high-speed railway of current China's production
Car has tetra- EMUs of vehicle of CRH1, CRH2, CRH5 and CRH3, and overall trip speed has all reached 250km/h or more speed.
Major part uses double-row conical bearing as the strength member at EMUs traveling position, and its security reliability directly affects row
The operation safety of car.Each bogie has 4 axle boxes for installing bearing, and bearing inner race is installed on axletree, constitutes train
Running part.Because bearing bears radial direction and axial load in use simultaneously, and bearing rotating speed is higher, it is ensured that
The freedom from repairs phase more long, so the greasy property requirement to bearing is higher.
The traction power of high-speed railway, in addition to the railway internal combustion engine traction of the part such as English, U.S., moral, other are electric power and lead
Draw, majority uses EMUs.The increase of bullet train running resistance and speed it is square proportional, and unstable wear is with speed not
Be it is linear but square or cubic relationship.Technical failure is mainly the premature abrasion of parts, therefore is selected in high speed traveling
Suitable lubriation material and lubricating system are reducing the problem that friction, energy saving, elongate member life-span are keys.
High speed motor car bearing uses rolling bearing, and the overwhelming majority uses grease lubrication.Railway freight-car axle is great, rotating speed is low,
Seeking the base oil of bearing grease has viscosity higher, can guarantee that there is the elastohydrodynamic lubrication of stabilization under any service condition, to reduce mill
Damage, extend the life-span.But the high viscosity base oil of fat will increase bearing temperature on the contrary under high-speed condition, shorten the use longevity of grease
Life, accelerates bearing fatigue.Speed is different, and Basic oil Viscosity is also different, so the choosing of the Basic oil Viscosity of express locomotive bearing grease
Select particularly significant.Speed is high simultaneously, and impact load is also big, it is desirable to which fat has preferable abrasion resistant extreme-pressure performance.
The high-speed bearing lubricating grease for using at present has following relevant report：
The B of CN 101622333 do not include above-mentioned ureas by carbamide compounds to coordinate in the urea-base grease of thickener
The high-speed bearing lubricating grease of the non-urea-base grease of compound, the kinematic viscosity of 40 DEG C of this grease base plinth oil is 15
~40mm2/ s, is applied to angular contact ball bearing, cylinder roller bearing that dmN values are more than 1,700,000 etc..CN 101812350 A
Artificial oil is thickened by polyureas, makes its grease applications in electronics, machine-tool industry, textile chemical fiber that dmN values are more than 2,000,000
Etc. industry high-speed bearing.The B of CN 102027102 are cooperation intramolecular tool in the urea-base grease of thickener by carbamide compounds
The high-speed bearing lubricating grease that the compound acid amides lithium soap for having amido link is constituted as the non-urea grease of thickener, this lubricating grease
40 DEG C of base oil kinematic viscosity be 15~40mm2/ s, is applied to the supporting work mechanism main shaft that dmN values are more than 1,700,000
The high-speed bearing lubricating grease used in rolling bearing Deng high-speed rotating shaft.The B of CN 102167991 are thickened by compound lithium soap
Artificial oil, Esters oil and mineral oil etc., the kinematic viscosity that 100 DEG C of base oil are 5~40mm2/ s adds extreme pressure and wear-resistant adds simultaneously
Plus agent etc., particularly for the lubricating grease of high-speed railway traction locomotive bearing of motor.The A of CN 104212613 pass through compound soap
Thickening base oil, adds extreme pressure, antirust and the additive such as wear-resistant, can form one layer of lubricating cream in bearing surface, protects axle
Hold, and with good resistant to elevated temperatures performance, at high temperature being capable of normal work.The A of CN 104212617 describe one kind and change
The high-speed bearing lubricating grease for entering.
But above-mentioned high-speed bearing lubricating grease major applications are in the small bearing of high speed, the thickening agent system of selection is mainly poly-
Urea, the heat setting and storage hardening of polyureas is a technological difficulties, still can not be solved at all at present.Also above-mentioned high speed profit
Consistent lubricant be concern bearing temperature rise it is low and from Basic oil Viscosity it is less than normal, it is necessary to pay close attention to high speed motor car south operation high-temperature grease
Losing issue.Other above-mentioned high-speed bearing lubricating grease is not concerned with low temperature properties use requirement, especially for northern cold season,
When climate temperature reaches less than -55 DEG C, it is difficult to start using current high-speed bearing fat low temperature, influences train operation.
The content of the invention
For the problem that presently, there are, the present invention is thickened Ji ﹑ Tian Jia Ji ﹑ grease making process and physical and chemical index etc. from Ji Chu You ﹑
Contrasted, with reference to the high-speed railway double-row conical axle box bearing of the km of speed per hour 250 work characteristics be the speed of service it is high,
Transport scope is wide, impact load is high, circumstance of temperature difference is big, sleet washes away, and speed per hour 200~250 is met the invention provides one kind
The preparation method of the lubricant composition of the high-speed railway axle box double-row conical bearing of km.From mixing lithium soap as when
The thickening agent of the high-speed railway double-row conical axle box bearing fat of fast 250 kms, it is thick that the type thickening agent can solve polyureas
The high-temperature stream occurred during agent use is become estranged the problem being hardened, by add compounding base oil and extreme pressure agent, renovation agent and
Antirust agent etc. forms a kind of lubricating grease with property, with excellent extreme pressure and antiwear behavior and barrier propterty.Can use
In high-speed railway industry, axle box bearing abrasion is reduced, while can extend that changed the fat cycle.
Technical scheme is as follows：
A kind of high-speed railway axle box double-row conical bearing lubricant composition：Including base oil, thickening agent and addition
Agent；It is characterized in that：Component and percentage by weight are：
Base oil：Its content is 50~83%；
Thickening agent：8~25%；
Additive：6~25%；
Wherein：
Base oil is that mass ratio is 1：1 Esters oil and artificial oil, its 40 DEG C of viscosity are 40~80mm2/ s, pour point is -65
℃；
Thickening agent is made up of the reactant of 12- hydroxy stearic acids, tetradecanoic acid, enanthic acid and monohydrate lithium hydroxide, wherein ten
Four alkanoic acids, enanthic acid, the mass ratio of 12- hydroxy stearic acids are 1：(1.58~2.62)：(6.13~15.62)；12 hydroxy stearates
Acid：Monohydrate lithium hydroxide=1：1.8.
Additive includes：
A () sulfoacid calcium, content is 3~8%；
B () extreme pressure agent, total content is 0.5~5%；
C () antirust agent, content is 1~5%；
D () renovation agent, content is 1~5%；
E () antioxidant, total content is 0.5~2%.
The tetradecanoic acid, enanthic acid, the mass ratio of 12 hydroxy stearic acids are 1：(1.6~2.6)：(6.2~15.6).
The additive is preferably in a proportion of：
A () sulfoacid calcium, content is 3~8%；
B () extreme pressure agent, content is 1~3%；
C () antirust agent, content is 1~3%；
D () renovation agent, content is 1~3%；
E () antioxidant, content is 1~2%.
The extreme pressure agent is antimony dialkyldithiophosphate, Vanlube829, the mixture of thiocarbamic acid molybdenum.
The antimony dialkyldithiophosphate, Vanlube829, the quality proportioning of thiocarbamic acid molybdenum are 1：2：1.
The antirust agent is sorbitol monooleate and dinonyl naphthalene sulfonate barium quality proportioning is 2：1 mixture.
The renovation agent is nano cupric oxide and nano zine oxide mixture, and its quality proportioning is 1：2.
The antioxidant is the mixture of phenthazine and zinc diamyldithiocarbamate, and its quality proportioning is 1：1.
The preparation method of composition of the invention, 12 hydroxy stearic acids, enanthic acid and sulfoacid calcium are added in base oil, are mixed
Conjunction is heated to 60~90 DEG C, adds the monohydrate lithium hydroxide saponification containing tetradecanoic acid compound 1.5~2 hours；With 2~2.5 hours
185~190 DEG C are warmed up to, this thermostatic 1~1.5 hour；Continue to be warmed up to 220~240 DEG C, then Temperature fall is to 120
Below DEG C, extreme pressure agent, antirust agent, renovation agent and antioxidant are sequentially added, by three rollers after temperature is reduced to 40~60 DEG C
Machine is canned after pressing oil three times.
After the present invention is introduced directly into sulfoacid calcium due to the stage of reaction, 12- hydroxy stearic acids, enanthic acid can be added with a step, plus
After thermosol, the lithium hydroxide solution dissolved with tetradecanoic acid is added, alkali recombination reaction is added by a step, reach preparation effect.
Lubricity of the invention meets the axle box bearing cold-starting under cryogenic conditions, extreme pressure property and adhesion by test
Property, it is good especially by the greasy property under the high-speed cruising operating mode of the FE-8 wear tests simulation km of speed per hour 250.
Effect of the invention：Lubricating grease of the invention is due to having selected suitable raw material proportioning so that the lubricating grease has
Good low temperature and water repelling property.The present invention gives full play to the cooperative effect of complex additive, it is met axle box bearing lubrication portion
Position.In addition, preparation of greases method of the present invention is reacted using one-step method direct combination, so that process is simple, saving energy consumption,
Production cost is reduced, and the product quality of the technique productions is also more stable.The present invention can reduce the mill of axle box bearing
Damage and barrier propterty, while can extend that changed the fat cycle.Special product for the exploitation of equipment feature can improve lubricating efficiency,
Reduce unnecessary loss, it is desired to be able to specification industry fat, preferably serve high-speed railway industry.
Specific embodiment
Effect of the invention is further illustrated by the following examples.However, it should be understood that the following examples are not limitations
The scope of the present invention, any change without departing from present inventive concept and scope is within the scope of the present invention.
Counted with lubricating grease as 100%, component and percentage by weight are as follows：
Base oil：Its content is 50~83%；Base oil is that mass ratio is 1:1 Esters oil and artificial oil, its 40 DEG C of viscosity
It is 40~80mm2/ s, pour point is -65 DEG C.
Thickening agent：8~25%；By the reactant group of 12- hydroxy stearic acids, tetradecanoic acid, enanthic acid and monohydrate lithium hydroxide
Into wherein tetradecanoic acid, enanthic acid, the mass ratio of 12- hydroxy stearic acids are 1：(1.58~2.62)：(6.13~15.62)；12
Hydroxy stearic acid：Monohydrate lithium hydroxide=1：1.8；
Additive：6~25%；Including：A () total base number 200mgKOH/g sulfoacid calciums, content is 3~8%；(b) extreme pressure agent
With antimony dialkyldithiophosphate, Vanlube829 (production of Vanderbilt company), thiocarbamic acid molybdenum mixture, always
Content is 0.5~5%；C () antirust agent is the mixture of sorbitol monooleate and dinonyl naphthalene sulfonate barium (T705), content
It is 1~5%；D () renovation agent is the mixture of nano cupric oxide and nano zine oxide, content is 1~5%；The fen of (e) antioxidant
The mixture of thiazine and zinc diamyldithiocarbamate, total content is 0.5~2%；
Extreme pressure agent is antimony dialkyldithiophosphate, Vanlube829, the mixture of thiocarbamic acid molybdenum.Dialkyl group two
D2EHDTPA antimony, Vanlube829, the preferred mass proportioning of the mixture of thiocarbamic acid molybdenum are 1：2：1.
Renovation agent is the mixture of the mixture of nano cupric oxide and nano zine oxide, nano cupric oxide and nano zine oxide
Preferred mass proportioning be 1：2.
Antioxidant is the mixture of phenthazine and zinc diamyldithiocarbamate, and phenthazine and diamyl disulfide are for ammonia
The preferred mass proportioning of the mixture of base zinc formate is 1：1.
Antirust agent is the mixture of sorbitol monooleate and dinonyl naphthalene sulfonate barium (T705), sorbital monooleate
The preferred mass proportioning of the mixture of ester and dinonyl naphthalene sulfonate barium (T705) is 2：1.
Lubricating grease preparation method of the invention is：12 hydroxy stearic acids, enanthic acid and sulfoacid calcium are added in base oil, are mixed
Conjunction is heated to 60~90 DEG C, adds the monohydrate lithium hydroxide saponification containing tetradecanoic acid compound 1.5~2 hours；With 2~2.5 hours
185~190 DEG C are warmed up to, this thermostatic 1~1.5 hour；Continue to be warmed up to 220~240 DEG C, then Temperature fall is to 120
Below DEG C, extreme pressure agent, antirust agent, renovation agent and antioxidant are sequentially added, by three rollers after temperature is reduced to 40~60 DEG C
Machine is canned after pressing oil three times.
Embodiment 1：
Base oil：73.7%；
Thickening agent：18.1%；
Additive：8.2%；
Quality is amounted to：100%
Wherein thickening agent is：
12- hydroxy stearic acids：14.1%
Tetradecanoic acid：1.3%
Enanthic acid：2.7%
Wherein additive is：
Sulfoacid calcium：3.8%；
Extreme pressure agent (antimony dialkyldithiophosphate, Vanlube829, thiocarbamic acid molybdenum)：1.9%；
Antirust agent (sorbitol monooleate and dinonyl naphthalene sulfonate barium (T705))：1.0%；
Renovation agent (nano cupric oxide and nano zine oxide)：1.0%；
Antioxidant (phenthazine and zinc diamyldithiocarbamate)：0.5%；
It is that 14.1%12 hydroxy stearic acids, mass fraction are that 2.7% enanthic acid and mass fraction are 3.8% sulphur by mass fraction
Sour calcium is added to mass fraction in 73.7% base oil, to be mixed and heated to 60~90 DEG C, and it is 1.3% 14 to add mass fraction
The monohydrate lithium hydroxide saponification of alkanoic acid is compound 1.5~2 hours；185~190 DEG C were warmed up to 2~2.5 hours, this thermostatic 1
~1.5 hours；Continue to be warmed up to 220~240 DEG C, then Temperature fall sequentially adds extreme pressure agent (dialkyl group to less than 120 DEG C
Phosphordithiic acid antimony, Vanlube829, thiocarbamic acid molybdenum) mass fraction is 1.9%, sorbitol monooleate and two nonyls
Base naphthalene sulfonate barium (T705) mass fraction is 1.0% and nano cupric oxide and nano zine oxide mass fraction are 1.0%, phenthazine
It is 0.5% with zinc diamyldithiocarbamate mass fraction, carries out post processing and obtain final product required product.Sample number into spectrum A
Embodiment 2：
Base oil：50%；
Thickening agent：25%；
Additive：25%；
Quality is amounted to：100%
Wherein thickening agent is：
12- hydroxy stearic acids：20.3%
Tetradecanoic acid：1.3%
Enanthic acid:3.4%
Wherein additive is：
Sulfoacid calcium：8.0%；
Extreme pressure agent (antimony dialkyldithiophosphate, Vanlube829, thiocarbamic acid molybdenum)：5.0%；
Antirust agent (sorbitol monooleate and dinonyl naphthalene sulfonate barium (T705))：5.0%；
Renovation agent (nano cupric oxide and nano zine oxide)：5.0%；
Antioxidant (phenthazine and zinc diamyldithiocarbamate)：2.0%.
It is that 20.3%12 hydroxy stearic acids, mass fraction are that 3.4% enanthic acid and mass fraction are 8.0% sulphur by mass fraction
Sour calcium is added to mass fraction in 50% base oil, to be mixed and heated to 60~90 DEG C, and addition mass fraction is 1.3% tetradecane
The monohydrate lithium hydroxide saponification of acid is compound 1.5~2 hours；185~190 DEG C were warmed up to 2~2.5 hours, this thermostatic 1~
1.5 hours；Continue to be warmed up to 220~240 DEG C, then Temperature fall sequentially adds extreme pressure agent (dialkyl group two to less than 120 DEG C
D2EHDTPA antimony, Vanlube829, thiocarbamic acid molybdenum) mass fraction is 5.0%, sorbitol monooleate and dinonyl
Naphthalene sulfonate barium (T705) mass fraction is 5.0% and nano cupric oxide and nano zine oxide mass fraction are 5.0%, phenthazine and
Zinc diamyldithiocarbamate mass fraction is 2%, carries out post processing and obtains final product required product.Sample number into spectrum B.
Embodiment 3：
Base oil：83%；
Thickening agent：9%；
Additive：8%；
Quality is amounted to：100%
Wherein thickening agent is：
12- hydroxy stearic acids：6.9%
Tetradecanoic acid：0.6%
Enanthic acid：1.5%
Wherein additive is：
Sulfoacid calcium：3.0%；
Extreme pressure agent (antimony dialkyldithiophosphate, Vanlube829, thiocarbamic acid molybdenum)：1.0%；
Antirust agent (sorbitol monooleate and dinonyl naphthalene sulfonate barium (T705))：1.0%；
Renovation agent (nano cupric oxide and nano zine oxide)：1.0%；
Antioxidant (phenthazine and zinc diamyldithiocarbamate)：2.0%.
It is that 6.9%12 hydroxy stearic acids, mass fraction are that 1.5% enanthic acid and mass fraction are 3.0% sulphur by mass fraction
Sour calcium is added to mass fraction in 83% base oil, to be mixed and heated to 60~90 DEG C, and addition mass fraction is 0.6% tetradecane
The monohydrate lithium hydroxide saponification of acid is compound 1.5~2 hours；185~190 DEG C were warmed up to 2~2.5 hours, this thermostatic 1~
1.5 hours；Continue to be warmed up to 220~240 DEG C, then Temperature fall sequentially adds extreme pressure agent (dialkyl group two to less than 120 DEG C
D2EHDTPA antimony, Vanlube829, thiocarbamic acid molybdenum) mass fraction is 1.0%, sorbitol monooleate and dinonyl
Naphthalene sulfonate barium (T705) mass fraction is 1.0% and nano cupric oxide and nano zine oxide mass fraction are 1.0%, phenthazine and
Zinc diamyldithiocarbamate mass fraction is 2%, carries out post processing and obtains final product required product.Sample number into spectrum C.
Embodiment 4：
Base oil：68%；
Thickening agent：17.2%；
Additive：14.8%；
Quality is amounted to：100%
Wherein thickening agent is：
12- hydroxy stearic acids：14.1%
Tetradecanoic acid：1.2%
Enanthic acid：1.9%
Wherein additive is：
Sulfoacid calcium：3.8%；
Extreme pressure agent (antimony dialkyldithiophosphate, Vanlube829, thiocarbamic acid molybdenum)：3.0%；
Antirust agent (sorbitol monooleate and dinonyl naphthalene sulfonate barium (T705))：3.0%；
Renovation agent (nano cupric oxide and nano zine oxide)：3.0%；
Antioxidant (phenthazine and zinc diamyldithiocarbamate)：2.0%.
It is that 14.1%12 hydroxy stearic acids, mass fraction are that 1.9% enanthic acid and mass fraction are 3.8% sulphur by mass fraction
Sour calcium is added to mass fraction in 68.0% base oil, to be mixed and heated to 60~90 DEG C, and it is 1.2% 14 to add mass fraction
The monohydrate lithium hydroxide saponification of alkanoic acid is compound 1.5~2 hours；185~190 DEG C were warmed up to 2~2.5 hours, this thermostatic 1
~1.5 hours；Continue to be warmed up to 220~240 DEG C, then Temperature fall is to less than 120 DEG C, extreme pressure agent (dialkyl dithio phosphorus
Sour antimony, Vanlube829, thiocarbamic acid molybdenum) mass fraction is 3.0%, sorbitol monooleate and dinonylnaphthalene sulfonic acid
Barium (T705) mass fraction is 3.0% and nano cupric oxide and nano zine oxide mass fraction are 3.0%, phenthazine and diamyl
Zinc dithiocarbamate mass fraction is 2%, carries out post processing and obtains final product required product.Sample number into spectrum D.
Embodiment 5：
Base oil：74%；
Thickening agent：20%；
Additive：6%；
Quality is amounted to：100%
Wherein thickening agent is：
12- hydroxy stearic acids：14.1%
Tetradecanoic acid：2.0%
Enanthic acid：3.9%
Wherein additive is：
Sulfoacid calcium：0.5%；
Extreme pressure agent (antimony dialkyldithiophosphate, Vanlube829, thiocarbamic acid molybdenum)：2.0%；
Antirust agent (sorbitol monooleate and dinonyl naphthalene sulfonate barium (T705))：1.5%；
Renovation agent (nano cupric oxide and nano zine oxide)：2.0%
Antioxidant (phenthazine and zinc diamyldithiocarbamate)：1.0%.
It is that 14.1%12 hydroxy stearic acids, mass fraction are that 3.9% enanthic acid and mass fraction are 5.5% sulphur by mass fraction
Sour calcium is added to mass fraction in 68% base oil, to be mixed and heated to 60~90 DEG C, and addition mass fraction is 2.0% tetradecane
The monohydrate lithium hydroxide saponification of acid is compound 1.5~2 hours；185~190 DEG C were warmed up to 2~2.5 hours, this thermostatic 1~
1.5 hours；Continue to be warmed up to 220~240 DEG C, then Temperature fall sequentially adds extreme pressure agent (dialkyl group two to less than 120 DEG C
D2EHDTPA antimony, Vanlube829, thiocarbamic acid molybdenum) mass fraction is 2.0%, sorbitol monooleate and dinonyl
Naphthalene sulfonate barium (T705) mass fraction is 1.5% and nano cupric oxide and nano zine oxide mass fraction are 2.0%, phenthazine and
Zinc diamyldithiocarbamate mass fraction is 1%, carries out post processing and obtains final product required product.Sample number into spectrum E.
Embodiment 6：
Base oil：64.0%；
Thickening agent：21.6%；
Additive：14.4%；
Quality is amounted to：100%
Wherein thickening agent is：
12- hydroxy stearic acids：14.1%
Tetradecanoic acid：2.3%
Enanthic acid：5.2%
Wherein additive is：
Sulfoacid calcium：7.0%；
Extreme pressure agent (antimony dialkyldithiophosphate, Vanlube829, the mixture of thiocarbamic acid molybdenum)：2.0%；
Antirust agent (sorbitol monooleate and dinonyl naphthalene sulfonate barium (T705))：2.0%；
Renovation agent (nano cupric oxide and nano zine oxide)：2.0%.
Antioxidant (phenthazine and zinc diamyldithiocarbamate)：1.4%.
It is that 14.1%12 hydroxy stearic acids, mass fraction are that 5.2% enanthic acid and mass fraction are 7.0% sulphur by mass fraction
Sour calcium is added to mass fraction in 64% base oil, to be mixed and heated to 60~90 DEG C, and addition mass fraction is 2.3% tetradecane
The monohydrate lithium hydroxide saponification of acid is compound 1.5~2 hours；185~190 DEG C were warmed up to 2~2.5 hours, this thermostatic 1~
1.5 hours；Continue to be warmed up to 220~240 DEG C, then Temperature fall sequentially adds extreme pressure agent (dialkyl group two to less than 120 DEG C
D2EHDTPA antimony, Vanlube829, thiocarbamic acid molybdenum) mass fraction is 2.0%, sorbitol monooleate and dinonyl
Naphthalene sulfonate barium (T705) mass fraction is 2% and nano cupric oxide and nano zine oxide mass fraction are 2.0%, phenthazine and two
Diamyl disulfide is 1.4% for carbaminate mass fraction, carries out post processing and obtains final product required product.Sample number into spectrum F.
Embodiment 7：
Base oil：62.0%；
Thickening agent：21.6%；
Additive：16.4%；
Quality is amounted to：100%
Wherein thickening agent is：
12- hydroxy stearic acids：14.1%
Tetradecanoic acid：2.3%
Enanthic acid：5.2%
Wherein additive is：
Sulfoacid calcium：7.0%；
Extreme pressure agent (antimony dialkyldithiophosphate, Vanlube829, thiocarbamic acid molybdenum)：3.0%；
Antirust agent (sorbitol monooleate and dinonyl naphthalene sulfonate barium (T705))：3.0%；
Renovation agent (nano cupric oxide and nano zine oxide)：2.0%.
Antioxidant (phenthazine and zinc diamyldithiocarbamate)：1.4%.
It is that 14.1%12 hydroxy stearic acids, mass fraction are that 5.2% enanthic acid and mass fraction are 7.0% sulphur by mass fraction
Sour calcium is added to mass fraction in 62% base oil, to be mixed and heated to 60~90 DEG C, and addition mass fraction is 2.3% tetradecane
The monohydrate lithium hydroxide saponification of acid is compound 1.5~2 hours；185~190 DEG C were warmed up to 2~2.5 hours, this thermostatic 1~
1.5 hours；Continue to be warmed up to 220~240 DEG C, then Temperature fall sequentially adds extreme pressure agent (dialkyl group two to less than 120 DEG C
D2EHDTPA antimony, Vanlube829, thiocarbamic acid molybdenum) mass fraction is 3.0%, sorbitol monooleate and dinonyl
Naphthalene sulfonate barium (T705) mass fraction is 3% and nano cupric oxide and nano zine oxide mass fraction are 2.0%, phenthazine and two
Diamyl disulfide is 1.4% for carbaminate mass fraction, carries out post processing and obtains final product required product.Sample number into spectrum G.
Embodiment 8：
Base oil：81%；
Thickening agent：8%；
Additive：11%；
Quality is amounted to：100%
Wherein thickening agent is：
12- hydroxy stearic acids：5.9%
Tetradecanoic acid：0.6%
Enanthic acid：1.5%
Wherein additive is：
Sulfoacid calcium：3.0%；
Extreme pressure agent (antimony dialkyldithiophosphate, Vanlube829, thiocarbamic acid molybdenum)：2.0%；
Antirust agent (sorbitol monooleate and dinonyl naphthalene sulfonate barium (T705))：3.0%；
Renovation agent (nano cupric oxide and nano zine oxide)：1.0%；
Antioxidant (phenthazine and zinc diamyldithiocarbamate)：2%.
It is that 5.9%12 hydroxy stearic acids, mass fraction are that 1.5% enanthic acid and mass fraction are 3.0% sulphur by mass fraction
Sour calcium is added to mass fraction in 81% base oil, to be mixed and heated to 60~90 DEG C, and addition mass fraction is 0.6% tetradecane
The monohydrate lithium hydroxide saponification of acid is compound 1.5~2 hours；185~190 DEG C were warmed up to 2~2.5 hours, this thermostatic 1~
1.5 hours；Continue to be warmed up to 220~240 DEG C, then Temperature fall sequentially adds extreme pressure agent (dialkyl group two to less than 120 DEG C
D2EHDTPA antimony, Vanlube829, thiocarbamic acid molybdenum) mass fraction is 2.0%, sorbitol monooleate and dinonyl
Naphthalene sulfonate barium (T705) mass fraction is 3.0% and nano cupric oxide and nano zine oxide mass fraction are 1.0%, phenthazine and
Zinc diamyldithiocarbamate mass fraction is 2%, carries out post processing and obtains final product required product.Sample number into spectrum H.
Embodiment 9：
Base oil：70.2%；
Thickening agent：18.1%；
Additive：11.7%；
Quality is amounted to：100%
Wherein thickening agent is：
12- hydroxy stearic acids：14.1%
Tetradecanoic acid：1.3%
Enanthic acid：2.7%
Wherein additive is：
Sulfoacid calcium：3.8%；
Extreme pressure agent (antimony dialkyldithiophosphate, Vanlube829, thiocarbamic acid molybdenum)：1.9%；
Antirust agent (sorbitol monooleate and dinonyl naphthalene sulfonate barium (T705))：2.0%；
Renovation agent (nano cupric oxide and nano zine oxide)：3.0%；
Antioxidant (phenthazine and zinc diamyldithiocarbamate)：1.0%
It is that 14.1%12 hydroxy stearic acids, mass fraction are that 2.7% enanthic acid and mass fraction are 3.8% sulphur by mass fraction
Sour calcium is added to mass fraction in 70.2% base oil, to be mixed and heated to 60~90 DEG C, and it is 1.3% 14 to add mass fraction
The monohydrate lithium hydroxide saponification of alkanoic acid is compound 1.5~2 hours；185~190 DEG C were warmed up to 2~2.5 hours, this thermostatic 1
~1.5 hours；Continue to be warmed up to 220~240 DEG C, then Temperature fall sequentially adds extreme pressure agent (dialkyl group to less than 120 DEG C
Phosphordithiic acid antimony, Vanlube829, thiocarbamic acid molybdenum) mass fraction is 1.9%, sorbitol monooleate and two nonyls
Base naphthalene sulfonate barium (T705) mass fraction is 2.0% and nano cupric oxide and nano zine oxide mass fraction are 3.0%, phenthazine
It is 1% with zinc diamyldithiocarbamate mass fraction, carries out post processing and obtain final product required product.Sample number into spectrum I
Embodiment 10：
Base oil：53%；
Thickening agent：25%；
Additive：22%；
Quality is amounted to：100%
Wherein thickening agent is：
12- hydroxy stearic acids：20.3%
Tetradecanoic acid：1.3%
Enanthic acid:3.4%
Wherein additive is：
Sulfoacid calcium：8.0%；
Extreme pressure agent (antimony dialkyldithiophosphate, Vanlube829, thiocarbamic acid molybdenum)：4.0%；
Antirust agent (sorbitol monooleate and dinonyl naphthalene sulfonate barium (T705))：4.0%；
Renovation agent (nano cupric oxide and nano zine oxide)：4.0%；
Antioxidant (phenthazine and zinc diamyldithiocarbamate)：2.0%.
It is that 20.3%12 hydroxy stearic acids, mass fraction are that 3.4% enanthic acid and mass fraction are 8.0% sulphur by mass fraction
Sour calcium is added to mass fraction in 53% base oil, to be mixed and heated to 60~90 DEG C, and addition mass fraction is 1.3% tetradecane
The monohydrate lithium hydroxide saponification of acid is compound 1.5~2 hours；185~190 DEG C were warmed up to 2~2.5 hours, this thermostatic 1~
1.5 hours；Continue to be warmed up to 220~240 DEG C, then Temperature fall sequentially adds extreme pressure agent (dialkyl group two to less than 120 DEG C
D2EHDTPA antimony, Vanlube829, thiocarbamic acid molybdenum) mass fraction is 4.0%, sorbitol monooleate and dinonyl
Naphthalene sulfonate barium (T705) mass fraction is 4.0% and nano cupric oxide and nano zine oxide mass fraction are 4.0%, phenthazine and
Zinc diamyldithiocarbamate mass fraction is 2%, carries out post processing and obtains final product required product.Sample number into spectrum J.
The analyzing test data of table 1 is contrasted
Comparative example *：This is certain product for the high-speed railway double-row conical axle box bearing for being currently used in the km of speed per hour 250
Board lubricating grease
Following some conclusion can be drawn by table 1：
(1) the detection number as can be seen that patent Example of the present invention 1~10 is tested by low temperature cone penetration and similar viscosity
According to, at low ambient temperatures, disclosure satisfy that axle box bearing lubricates lubricating requirement under particularly -55 DEG C low temperature environments, reducing energy consumption is bright
It is aobvious better than comparative example lubricating grease low temperature properties；
(2) the axle box bearing lubricating grease that can be seen that Patent exploitation of the present invention by corrosion and anticorrosion test can expire
The barrier propterty of sufficient axle box bearing,；
(3) by OK values as can be seen that the present invention exploitation axle box bearing fat extreme pressure property it is high, disclosure satisfy that high-speed railway transport
Greater impact load is resisted during row；
(4) by oxidation stability experimental test can be seen that this patent develop life of product it is long, axle box can be extended
The usage cycles of bearing.
(5) by roller stability and 100,000 times shearing as can be seen that this patent develop product mechanical stability it is good, knot
Structure stabilization, meets high-speed railway requirement of actual working condition.
(6) by add water roller drum experiments as can be seen that this patent develop product water repelling property it is good, meet water do not emulsify, energy
Enough adapt to the influence such as trans-regional, climate variability of high-speed railway.
(7) the product greasy property protrusion as can be seen that this patent exploitation is tested by FE-8, in the mould of speed per hour 250km
Intend that under operating mode requirement of 500 hours wear extenies less than 35mg can be reached, while smaller than comparative example lubricating grease wear extent.
Claims (10)
1. a kind of high-speed railway axle box double-row conical bearing lubricant composition：Including base oil, thickening agent and additive；
It is characterized in that：Component and percentage by weight are：
Base oil：Its content is 50~83%；
Thickening agent：8~25%；
Additive：6~25%；
Wherein：
Base oil is that mass ratio is 1：1 Esters oil and artificial oil, its 40 DEG C of viscosity are 40~80mm2/ s, pour point is -65 DEG C；
Thickening agent is made up of the reactant of 12- hydroxy stearic acids, tetradecanoic acid, enanthic acid and monohydrate lithium hydroxide, wherein the tetradecane
Acid, enanthic acid, the mass ratio of 12- hydroxy stearic acids are 1：(1.58~2.62)：(6.13~15.62)；12 hydroxy stearic acids：It is single
Water lithium hydroxide=1：1.8.
2. composition as claimed in claim 1, it is characterized in that additive includes：
A () sulfoacid calcium, content is 3~8%；
B () extreme pressure agent, total content is 0.5~5%；
C () antirust agent, content is 1~5%；
D () renovation agent, content is 1~5%；
E () antioxidant, total content is 0.5~2%.
3. composition as claimed in claim 1, it is characterized in that the tetradecanoic acid, enanthic acid, the mass ratio of 12 hydroxy stearic acids
It is 1：(1.6~2.6)：(6.2~15.6).
4. composition as claimed in claim 2, it is characterized in that the additives ratio is：
A () sulfoacid calcium, content is 3~8%；
B () extreme pressure agent, content is 1~3%；
C () antirust agent, content is 1~3%；
D () renovation agent, content is 1~3%；
E () antioxidant, content is 1~2%.
5. composition as claimed in claim 1, it is characterized in that extreme pressure agent be antimony dialkyldithiophosphate, Vanlube829,
The mixture of thiocarbamic acid molybdenum.
6. composition as claimed in claim 5, it is characterized in that the antimony dialkyldithiophosphate, Vanlube829, thio
The quality proportioning of carbamic acid molybdenum is 1：2：1.
7. composition as claimed in claim 1, it is characterized in that antirust agent is sorbitol monooleate and dinonylnaphthalene sulfonic acid
Barium quality proportioning is 2：1 mixture.
8. composition as claimed in claim 1, it is characterized in that renovation agent is nano cupric oxide and nano zine oxide mixture, its
Quality proportioning is 1：2.
9. composition as claimed in claim 1, it is characterized in that antioxidant is phenthazine and zinc diamyldithiocarbamate
Mixture, its quality proportioning be 1：1.
10. the preparation method of composition as claimed in claim 1, it is characterized in that by 12 hydroxy stearic acids, enanthic acid and sulfoacid calcium
It is added in base oil, is mixed and heated to 60~90 DEG C, adds the monohydrate lithium hydroxide saponification containing tetradecanoic acid compound 1.5~2
Hour；185~190 DEG C were warmed up to 2~2.5 hours, this thermostatic 1~1.5 hour；Continue to be warmed up to 220~240 DEG C,
Then Temperature fall sequentially adds extreme pressure agent, antirust agent, renovation agent and antioxidant to less than 120 DEG C, 40 are reduced to when temperature~
It is canned after three-roller presses oil three times after 60 DEG C.
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| CN109135886A (en) * | 2018-07-23 | 2019-01-04 | 中国铁路总公司 | A kind of high-speed EMUs antifriction-bearing grease composition and preparation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103497808A (en) * | 2013-08-29 | 2014-01-08 | 中国石油化工股份有限公司 | Grease composition for automobile wheel hub bearings and its preparation method |
| CN104629882A (en) * | 2015-02-09 | 2015-05-20 | 新乡市恒星化工有限责任公司 | Special lubricating grease for low-speed motor bearing and preparation method of special lubricating grease |
| CN105331426A (en) * | 2015-10-23 | 2016-02-17 | 中国石油化工股份有限公司 | Anti-rust extreme pressure lithium lubricating grease composition and preparation method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103497808A (en) * | 2013-08-29 | 2014-01-08 | 中国石油化工股份有限公司 | Grease composition for automobile wheel hub bearings and its preparation method |
| CN104629882A (en) * | 2015-02-09 | 2015-05-20 | 新乡市恒星化工有限责任公司 | Special lubricating grease for low-speed motor bearing and preparation method of special lubricating grease |
| CN105331426A (en) * | 2015-10-23 | 2016-02-17 | 中国石油化工股份有限公司 | Anti-rust extreme pressure lithium lubricating grease composition and preparation method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109135886A (en) * | 2018-07-23 | 2019-01-04 | 中国铁路总公司 | A kind of high-speed EMUs antifriction-bearing grease composition and preparation method |
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