CN107057807A - Lubricant composition, rolling bearing and motor - Google Patents

Lubricant composition, rolling bearing and motor Download PDF

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Publication number
CN107057807A
CN107057807A CN201610987206.7A CN201610987206A CN107057807A CN 107057807 A CN107057807 A CN 107057807A CN 201610987206 A CN201610987206 A CN 201610987206A CN 107057807 A CN107057807 A CN 107057807A
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China
Prior art keywords
salt
lubricant composition
acid
carboxylic acid
metal salt
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Granted
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CN201610987206.7A
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Chinese (zh)
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CN107057807B (en
Inventor
浅井佑介
榎本祐介
高田真太郎
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Minebea Co Ltd
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Minebea Co Ltd
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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
    • 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
    • C10M169/06—Mixtures of thickeners and additives
    • 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
    • C10M167/00—Lubricating compositions characterised by the additive being a mixture of a macromolecular compound, a non-macromolecular compound and a compound of unknown or incompletely defined constitution, each of these compounds being essential
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6633—Grease properties or compositions, e.g. rheological properties
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1735—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at only one end of the rotor
    • 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
    • C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
    • 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
    • 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
    • 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
    • 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
    • C10M2207/10—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
    • C10M2207/123—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms polycarboxylic
    • 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
    • C10M2207/10—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
    • C10M2207/127—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 polycarboxylic
    • 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
    • C10M2207/285—Esters of aromatic polycarboxylic acids
    • C10M2207/2855—Esters of aromatic polycarboxylic acids used as base material
    • 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
    • C10M2209/084—Acrylate; Methacrylate
    • 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
    • C10M2209/086—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 polycarboxylic, e.g. maleic acid
    • 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
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/10—Amides of carbonic or haloformic acids
    • C10M2215/1013—Amides of carbonic or haloformic acids used as thickening agents
    • 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
    • C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2217/045—Polyureas; Polyurethanes
    • C10M2217/0456—Polyureas; Polyurethanes used as thickening agents
    • 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
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/02—Groups 1 or 11
    • 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
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/04—Groups 2 or 12
    • 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
    • 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
    • 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
    • C10N2040/14—Electric or magnetic purposes
    • 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
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/10—Semi-solids; greasy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Lubricants (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

The present invention provide it is a kind of in high temperature environments using under heat deterioration also few lubricant composition, hot environment using acoustic characteristic also good rolling bearing and motor.The lubricant composition contains base oil, thickener, more than 0.5wt% dispersant, and above-mentioned dispersant contains either one in the copolymer of the metal salt of carboxylic acid, the metal salt of polybasic carboxylic acid and carboxylic metallic salt and hydrocarbon compound.The carboxylic metallic salt of the copolymer of the metal salt of carboxylic acid, the metal salt of polybasic carboxylic acid and formation carboxylic metallic salt and hydrocarbon compound can be the alkali metal salt containing at least one of sodium salt, lithium salts, sylvite or the alkali salt containing at least one of magnesium salts, calcium salt.

Description

Lubricant composition, rolling bearing and motor
Technical field
The present invention relates to lubricant composition, rolling bearing and motor.
Background technology
For the rolling bearing for family's electrical article, the fan motor of communication equipment etc., lubricating grease is used in order to lubricate Composition.Lubricant composition contains base oil, thickener and additive, for example, have the urea for containing carbamide compound as thickener Base grease.Because the heat resistance of the urea-base grease is good, therefore, using the urea-base grease rolling bearing at high temperature Use, acoustic characteristic is also good.
For example, Patent Document 1 discloses a kind of urea-base grease, is the profit containing base oil, thickener and additive Grease composition, containing the carbamide compound as thickener, as in the carboxylic acid, carboxylate and ester of additive (antirust agent) extremely It is few a kind.
In addition, being the profit containing base oil, thickener and additive Patent Document 2 discloses a kind of urea-base grease Grease composition, containing the aromatic ester oils that base oil is more than 30 mass % (wt%), and contains 5~35 mass % (wt%) Two carbamide compounds.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2004-224823 publications
Patent document 2：Japanese Unexamined Patent Publication 2004-339448 publications
The content of the invention
However, making the use environment high temperature of fan motor due to family's electrical article, increase of the caloric value of communication equipment etc. Change, accompany with this, use environment at higher temperatureization of rolling bearing.It is therefore desirable to which urea-base grease is in ring at higher temperature than ever Heat deterioration can also be suppressed by being used under border.Even if however, using the urea-base grease described in patent document 1,2, heat resistance is not also filled Point, therefore, there is the urea-base grease under hot environment described above to condense, acoustic characteristic is deteriorated during for rolling bearing Problem is, it is necessary to which further improve.
The present invention is to carry out in view of the foregoing, even if a kind of in high temperature environments using heat its object is to provide Deterioration also uses acoustic characteristic also good rolling bearing and motor under few lubricant composition, hot environment.
In order to solve above-mentioned problem, and purpose is realized, the lubricant composition of a mode of the invention is characterised by, Containing base oil, thickener, more than 0.5wt% dispersant, above-mentioned dispersant contains the gold of the metal salt of carboxylic acid, polybasic carboxylic acid Belong to either one in the copolymer of salt and carboxylic metallic salt and hydrocarbon compound.
In addition, the lubricant composition of a mode of the present invention is characterised by, the metal salt of above-mentioned carboxylic acid and above-mentioned At least one party in the metal salt of polybasic carboxylic acid is the alkali metal salt containing at least one of sodium salt, lithium salts, sylvite, Huo Zhehan There is the alkali salt of at least one of magnesium salts, calcium salt.
In addition, the lubricant composition of the mode of the present invention is characterised by, above-mentioned carboxylic metallic salt and hydrocarbon are formed The above-mentioned carboxylic metallic salt of the copolymer of compound is the alkali metal salt containing at least one of sodium salt, lithium salts, sylvite, or Alkali salt containing at least one of magnesium salts, calcium salt.
In addition, the lubricant composition of the mode of the present invention is characterised by that the content of above-mentioned dispersant is Below 10wt%.
In addition, the lubricant composition of the mode of the present invention is characterised by that above-mentioned thickener contains following formulas (1) two carbamide compounds represented.
R1-NHCONH-R2-NHCONH-R3···(1)
Here, R1、R2、R3It is the alkyl in aliphatic alkyl, alicyclic alkyl, aromatic hydrocarbyl.
The lubricant composition of the mode of the present invention is characterised by, containing base oil, includes following formulas (1) table The thickener and 0.5wt%~10%wt% dispersant of two carbamide compounds shown, above-mentioned dispersant contain the sodium of decanedioic acid Either one in the copolymer of salt, the sodium salt of polyacrylic acid and maleic acid sodium salt and isobutene.
R1-NHCONH-R2-NHCONH-R3···(1)
Here, R1、R2、R3It is the alkyl in aliphatic alkyl, alicyclic alkyl, aromatic hydrocarbyl.
The rolling bearing of the mode of the present invention is characterised by, has enclosed foregoing grease composition.
The motor of the mode of the present invention is characterised by possessing above-mentioned rolling bearing.
According to the present invention, it is possible to provide use heat deterioration also few lubricant composition, hot environment under a kind of hot environment Lower use acoustic characteristic also good rolling bearing and motor.
Brief description of the drawings
Fig. 1 is the sectional view of the fan motor for the rolling bearing for possessing embodiments of the present invention.
Fig. 2 is the sectional view of the rolling bearing of embodiments of the present invention.
Fig. 3 is the figure for the experimental result for representing embodiments of the invention.
Fig. 4 is the figure for the experimental result for representing embodiments of the invention.
Embodiment
Hereinafter, the embodiment referring to the drawings to the lubricant composition, rolling bearing and motor of the present invention is carried out in detail Explanation.It should illustrate, the present invention is not limited by following embodiment.In addition, in the drawings, to it is same or it is corresponding will Element suitably marks same symbol, suitably omits repeat specification.
Fig. 1 is the sectional view of the fan motor 10 for the rolling bearing 20 for possessing embodiments of the present invention.Fig. 2 is the present invention Embodiment rolling bearing 20 sectional view.
The fan motor 10 of embodiments of the present invention possesses armature spindle 11, rolling bearing 20, stator 12, impeller 13, outer Shell 16.Armature spindle 11 is rotatably kept by rolling bearing 20.Impeller 13 has rotor case 14 and is arranged at rotor case The blade 15 of 14 periphery.
Rolling bearing 20 possesses lubrication groove 21, foreign steamer 22, spherical rotor 23, retainer 24 and encapsulant 25.Moreover, Lubricant composition G is being enclosed by the sealed inside of encapsulant 25.It should illustrate, for applying embodiments of the present invention Rolling bearing 20, be not limited to fan motor, can also be applied to other species motor.
Next, being illustrated to the lubricant composition G of embodiments of the present invention.The profit of embodiments of the present invention Grease composition G contains base oil and thickener, further the metal salt and carboxylic of the metal salt containing carboxylic acid, polybasic carboxylic acid Either one in the copolymer of acid metal salt and hydrocarbon compound is used as dispersant.The present inventor etc. enters to lubricant composition Row further investigation, results verification in rolling bearing using lubricant composition and in high temperature environments (such as more than 140 DEG C) For a long time in use, because of the condensation product coarsening in lubricant composition, and the acoustic characteristic of rolling bearing is caused to deteriorate.And And, find metal salt, the metal salt of polybasic carboxylic acid and carboxylic metallic salt and the hydrocarbon by making lubricant composition contain carboxylic acid Either one in the copolymer of compound is as dispersant, even if using rolling bearing for a long time in high temperature environments, The coarsening of condensation product can be suppressed, the deterioration of acoustic characteristic can be reduced.The lubricant composition G of embodiments of the present invention Completed based on the opinion.
The species of base oil is not particularly limited, it is however generally that, it can will can be used as grease base oil, synthesis hydrocarbon Oil, alkyl ether oil, alkyl diphenyl base ether oil, ester oil, Dormant oils, fluorocarbon oil, silicone oil etc. are used alone or as a mixture.The content example of base oil Such as it is 70wt%~90wt%.
As synthetic hydrocarbon oil system, for example, it can enumerate normal paraffin hydrocarbons, isoparaffin, polybutene, polyisobutene, 1- decene oligomerizations The poly alpha olefins such as thing, 1- decene ethylene low polymers.As ester oil, for example, it can enumerate the dibutyl sebacate, -2- ethyls of decanedioic acid two Hexyl ester, di-n-octyl sebacate, dioctyl adipate, diisodecyl adipate (DIDA), adipic acid two (tridecyl) ester, glutaric acid two (tridecyl) ester (ジ ト リ デ シ Le タ レ ー ト), acetylricinoleate alkyd methyl esters (メ チ Le ア セ チ Le シ ノ レ ー ト) etc. Diester oil, trioctyl trimellitate (TOTM), tri trimellitate -2- ethylhexyls, trimellitic acid tridecane base ester, Pyromellitic Acid four The aromatic ester oils, trimethylolpropane caprylate, trimethylolpropane nonyl such as the monooctyl ester, -2- ethylhexyls of Pyromellitic Acid four The polyalcohol ester oils such as acid esters, pentaerythrite -2 ethyl hexanoic acid ester, pentaerythrite pelargonate, carbonic acid ester oil etc..It is used as alkyl diphenyl Base ether oil, can enumerate monoalkyl diphenyl ether, dialkyl diphenyl ether, poly- alkyl diphenyl base ether etc..It is preferably fragrance in above-mentioned Race's ester oil, can be used alone or as a mixture.Particularly preferably use tri trimellitate -2- ethylhexyls and Pyromellitic Acid The base oil that four -2- ethylhexyls are mixed.
As thickener, non-carbamide compound or carbamide compound can be used, but from the aspect of heat resistance and acoustic characteristic, it is excellent Choosing uses carbamide compound.The content of thickener is, for example, 10wt%~30wt% scope.
As non-carbamide compound, metallic soap, polyflon etc. can be enumerated.Metallic soap can be by fat such as stearic acid The aliphatic monocarboxylic acids containing at least one hydroxyl such as race's monocarboxylic acid, 12- hydroxy stearic acids and alkaline earth metal hydroxide synthesis. Alternatively, it is also possible to use the composition metal soap synthesized by the binary acid such as aliphatic monocarboxylic acid and aliphatic dicarboxylic acid.
As carbamide compound, the carbamide compounds such as two carbamide compounds, three carbamide compounds, many carbamide compounds can be used.Especially from From the aspect of heat resistance and acoustic characteristic (quietness), two carbamide compounds are preferably used.Two carbamide compounds can be by following formula (1) Represent.
R1-NHCONH-R2-NHCONH-R3···(1)
Here, R1、R2、R3For the alkyl in aliphatic alkyl, alicyclic alkyl, aromatic hydrocarbyl, specifically, R1、R2、R3It can be aliphatic alkyl, or alicyclic alkyl, can also be aromatic hydrocarbyl, carbon number is without spy Do not limit.R2Preferably aromatic hydrocarbyl, more preferably the 1 of phenyl or 2 substituted aromatic hydrocarbyls.Synthesize these changes Amines and isocyanate compound can be used in the raw material used during compound.As amines, except with hexylamine, octylame, Lauryl amine, cetylamine, octadecylamine, stearylamine, oleyl amine etc. are the aliphatic amine of representative, with the ester ring type amine for representative such as cyclohexylamine In addition, it is also possible to use the aromatic amine for representative with aniline, para-totuidine, phenetidine etc..As isocyanate compound, Phenylene vulcabond, toluene di-isocyanate(TDI), diphenyl diisocyanate, diphenylmethane diisocyanate can be used Ester, octadecane diisocyanate, decane diisocyanate, hexamethylene diisocyanate.Preferably use using aliphatic amine and The carbamide compound of aliphatic-aromatic two that aromatic amine is synthesized as amine raw material with aromatic isocyanate.
Carboxylic acid used in the metal salt of the carboxylic acid contained as dispersant is not limited, but preferred aliphat carboxylic acid, It can be aliphatic saturated carboxylic acid, or aliphatic unsaturated carboxylic acid.In addition, to used in the metal salt of polybasic carboxylic acid Polybasic carboxylic acid is not also limited, and as the carboxylic acid for the carboxylic acid that comes from different backgrounds and possess different abilities, similarly preferred aliphat carboxylic acid, can satisfy for aliphatic And carboxylic acid, or aliphatic unsaturated carboxylic acid.It is more preferably unsaturated using aliphatic as the carboxylic acid for the carboxylic acid that comes from different backgrounds and possess different abilities Carboxylic acid.If unsaturated carboxylic acid, there is acrylic acid, crotonic acid, iso-crotonic acid, 3-butenoic acid, methacrylic acid, angelic acid, cautious Each acid, 4- penetenoic acids, 2- ethyl -2- butenoic acids, 10 hendecenoic acid, oleic acid etc., if saturated dicarboxylic acid, there is oxalic acid, the third two Acid, butanedioic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, decanedioic acid.If saturated carboxylic acid, there are formic acid, second It is acid, propionic acid, butyric acid, valeric acid, caproic acid, enanthic acid, octanoic acid, n-nonanoic acid, capric acid, laurate, myristic acid, palmitic acid, Heptadecanoic acide, hard Resin acid, if unsaturated dicarboxylic, there is fumaric acid, maleic acid, itaconic acid etc..In addition, the polynary carboxylic being made up of these carboxylic acids Acid can be the polymer of monocarboxylic acid or the polymer of dicarboxylic acids.The particularly preferred unsaturated carboxylic acid containing 1 or 2 carboxyl Polymer.It should illustrate, the metal salt of these carboxylic acids can form the copolymer with hydrocarbon compound.That is, lubricant composition can Dispersant is used as using the copolymer comprising carboxylic metallic salt and hydrocarbon compound.In addition, lubricant composition can be to include carboxylic acid The composition of either one in the copolymer of metal salt, the metal salt of polybasic carboxylic acid and carboxylic metallic salt and hydrocarbon compound. It is used as the carboxylic acid metal of the copolymer of the metal salt or formation carboxylic metallic salt and hydrocarbon compound of carboxylic metallic salt and polybasic carboxylic acid The concrete example of salt, for example, can enumerate selected from least one of alkali metal salt and alkali salt.As alkali metal salt, preferably For sodium salt, lithium salts, sylvite etc., alkali salt, preferably magnesium salts, calcium salt etc. are used as.In being total to for carboxylic metallic salt and hydrocarbon compound In polymers, as polymerizeing the hydrocarbon compound of (polymerisation) with carboxylic metallic salt, for example, have isobutene, propylene, isoprene, Butadiene etc..
The weight for the polyethylene glycol conversion that the weight average molecular weight of polybasic carboxylic acid is obtained preferably by gel permeation chromatography (GPC) is equal Molecular weight (Mw) is 5000~200000, more preferably 7000~80000, more preferably 9000~16000.
In the lubricant composition G of embodiments of the present invention, the carboxylic metallic salt or polybasic carboxylic acid of dispersant are used as Metal salt preferably comprise more than 0.5wt%.The content of the metal salt of carboxylic metallic salt or polybasic carboxylic acid is more than 0.5wt% When, heat resistance can be fully improved, heat deterioration is reduced, acoustic characteristic becomes good.It should illustrate, dispersant is carboxylic metallic salt During with the copolymer of hydrocarbon compound, it is also preferred that containing more than 0.5wt%.In the lubricant composition G of embodiments of the present invention In, the content of dispersant is preferably below 10wt%.
Other additives, antioxidant, friction resistant are used as in addition, can contain as needed in lubricant composition G Agent, matal deactivator, antirust agent, oiliness improver, viscosity index improving agent etc..
In the lubricant composition as present embodiment as constructed as above, rolling bearing and motor, lubricating grease group Compound contains above-mentioned dispersant, so heat resistance is high, also few using heat deterioration in high temperature environments, the acoustic characteristic of rolling bearing Well.Here, lubricant composition is by containing dispersant, so that condensation product can also be suppressed in high temperature environments by using for a long time Coarsening, therefore, during for rolling bearing, even if using at high temperature, acoustic characteristic also becomes good.
It should illustrate, the embodiment that above-mentioned each inscape is combined as and constituted is also included in the present invention. In addition, on further variation, those skilled in the art can easily export.Thus, the present invention widely mode Above-mentioned embodiment is not limited to, various changes can be carried out.
For example, in above-mentioned embodiment, lubricant composition can contain the sodium salt of carboxylic acid or polybasic carboxylic acid as scattered Agent.Alternatively, it is also possible to the polybasic carboxylic acid beyond the sodium salt to contain carboxylic acid or polybasic carboxylic acid metal salt as dispersant structure Into.As carboxylic acid or the metal salt of polybasic carboxylic acid, in addition to sodium salt, for example, lithium salts, sylvite, magnesium salts, calcium salt can be enumerated.The feelings It is at least one kind of in the metal salt containing carboxylic acid or polybasic carboxylic acid under condition.As long as lubricant composition contains carboxylic acid or polynary The metal salt of carboxylic acid, just plays the lubricant composition G identical effects with illustrating in above-mentioned embodiment.Furthermore it is possible to be The copolymer formed by carboxylic metallic salt and hydrocarbon compound is constituted using the metal salt beyond sodium salt or sodium salt.In addition, lubrication Oil/fat composition contains carboxylic metallic salt, the metal salt of polybasic carboxylic acid and the copolymer formed by carboxylic metallic salt and hydrocarbon compound In two or more as dispersant when, preferably add up to contain more than 0.5wt%.
(embodiment and comparative example)
Next, being illustrated to examples and comparative examples of the present invention.In embodiment and comparative example, various profits are made Grease composition, and research is compared to its characteristic.
Composition as shown in table 1,2, by base oil, thickener and dispersant, makes embodiment 1~20 and comparative example 1~9 lubricant composition.Based on oil, use ester oil (TOTM (trioctyl trimellitate (TOTM))+TOPM (Pyromellitic Acids four Monooctyl ester)), PAO (poly-alpha-olefin), Dormant oils.As thickener, inciting somebody to action as two carbamide compound A (being two urea A in table 1,2) is used Mixture that aromatic series carbamide compound and aliphatic carbamide compound are obtained by mixing, as two carbamide compound B (it is two ureas in table 1,2 B the mixture for being obtained by mixing aliphatic carbamide compound and ester ring type carbamide compound).As dispersant, using as polynary The sodium salt (in table 1,2 be A) of the polyacrylic acid of the metal salt of carboxylic acid, it is used as the horse of carboxylic metallic salt and the copolymer of hydrocarbon compound Carry out copolymer (being B in table 1,2), the decanedioic acid sodium salt (being C in table 1,2) as carboxylic metallic salt of acid sodium-salt and isobutene. In table 1,2, numeral expressed as a percentage is the content that dispersant is represented with quality %.That is, in the lubricating grease of embodiment 1~20 In composition, contain dispersant A, B or C in 0.5wt%~10.0wt% scope.In the lubricant composition of comparative example 1~3 Dispersant is not contained.Dispersant A containing 0.1wt%, B, C respectively in the lubricant composition of comparative example 4,5,8.In addition, than Compared with the lubricant composition of example 6,7 respectively containing 2.0wt%, as belong to beyond polycarboxylate but metal salt poly- third Enoic acid ammonium salt (being D in table 2), polyacrylic acid amine salt (being E in table 2).In addition, containing in the lubricant composition of comparative example 9 2.0wt%, be used as the decanedioic acid ammonium salt (in table 2 be F) belonged to beyond carboxylate but metal salt.To each lubricating grease group being made Compound carries out heating described later and stood after experiment, and the size to condensation product is evaluated.
[table 1]
[table 2]
Table 2 (comparative example)
The size of condensation product is by carrying out as each lubricant composition standing 500 hours in the environment of 160 DEG C Heating is stood after experiment, is evaluated with the size of observation by light microscope condensation product.Now, to the multiplying power sight with 200 times Examine 300 μm of square region 1 at the visual field when the maximum gauge of condensation product be measured.The result of above-mentioned experiment is shown in table 1、2。
As shown in the evaluation result of the heat resistance of table 1,2, in embodiment 1~20, under 160 DEG C of hot environment Stand for a long time, the maximum gauge of condensation product is again smaller than 100 μm.On the other hand, in comparative example 1~9, in lubricant composition Condensation product is thick to turn to more than 100 μm.
And then, for embodiment 3,9,16 and the lubricant composition of comparative example 1,4, as the evaluation of heat resistance, carry out The measure of viscosity.Specifically, to the embodiment 3,9,16 and the lubricant composition of comparative example 1,4 that are made respectively 120 DEG C, 140 DEG C, the heating carried out 500 hours under 160 DEG C of temperature conditionss stand after experiment, determine the viscosity of each lubricant composition. The measure of viscosity is measured under conditions of 25 DEG C of temperature, shear rate 1/s, spacing 0.2mm using rheometer.Will experiment As a result it is shown in Fig. 3.In Fig. 3, transverse axis represents dwell temperature, and the longitudinal axis represents viscosity.According to Fig. 3 result, it is known that in 120 DEG C add Heat is stood in result of the test, and the viscosity differences between embodiment and comparative example are not very big, but as 140 DEG C or 160 DEG C Heating under hot environment is stood after experiment, the lubricant composition of embodiment 3,9,16 and the grease composition of comparative example 1,4 Thing is compared, and viscosity is considerably lower.That is, the lubricant composition of embodiment 3,9,16 can be confirmed in the hot environment more than 120 DEG C Lower heat deterioration is also few, can maintain the characteristic of lubricating grease.
And then, for embodiment 3,9,16 and the lubricant composition of comparative example 1,4, as heat-resistance test, carry out such as Under heating rotation test：Each lubricant composition is enclosed into rolling bearing, respectively in 120 DEG C, 140 DEG C, 160 DEG C of experiment temperature Degree, is rotated 500 hours with rotary speed 3000rpm, the acoustic characteristic of the rolling bearing of investigation thereafter.
Specifically, in the ball bearing (internal diameter 8mm, external diameter 22mm, width 7mm) with protection steel cage, with bearing The 25%~35% of volume encloses experiment lubricating grease.Then, the ball bearing is installed in housing, in bearing bore diameter insertion Axle, makes axle be combined with experiment with the rotary shaft of motor, in each test temperature bar in the way of making ball bearing carry out lubrication groove rotation Rotated under part, carry out heating rotation test.
The evaluation of acoustic characteristic after heating rotation test is to use Andrew's instrument (society of Jian Yuan research institutes of Co., Ltd. system) To postrotational ball bearing under each test temperature, the Anderon values of M frequency bands (300~1800Hz) are determined.It should illustrate, M frequencies 300~1800Hz of frequency of band is ear-piercing sound for people.The experimental result is shown in Fig. 4.In Fig. 4, transverse axis represents examination Temperature is tested, the longitudinal axis represents Anderon values.As shown in figure 4, can confirm the lubricant composition of embodiment 3,9,16 140 DEG C, Under hot environment as 160 DEG C, the Anderon values after rotation test are heated compared with the lubricant composition of comparative example 1,4, Substantially low value is displayed that, acoustic characteristic (quietness) is good.For example, the situation after 160 DEG C of heating rotation test is, implement The Anderon values of example 3,9,16 are each about 5, are less than the 1/2 of the Anderon values (respectively may be about 17, about 13) of comparative example 1,4 Or less than 1/3 value.
It should illustrate, as shown in table 2, when the lubricant composition of comparative example 1,4 carries out heating standing experiment, condensation product Maximum gauge is respectively 250 μm, 130 μm, the size as more than 100 μm.Moreover, the lubricant composition of comparative example 1,4 exists The Anderon values after heating rotation test at 160 DEG C turn into the value more than 10, feel ear-piercing sound.Therefore, as profit Grease composition, preferably stands examination with heating as carrying out standing 500 hours in the environment of 160 DEG C to lubricant composition The maximum gauge of the condensation product produced after testing turns into the lubricant composition that less than 100 μm of mode contains dispersant.
From the dispersant in above-described embodiment, comparative example, the present invention in lubricant composition, to suppress by urea Contain for the purpose of the coarsening of condensation product caused by the heat deterioration of the thickeners such as compound.
Symbol description
G lubricant compositions
10 motors (fan motor)
11 armature spindles
12 stators
13 impellers
14 rotor cases
15 blades
16 shells
20 rolling bearings
21 lubrication grooves
22 foreign steamers
23 rotors
24 retainers
25 encapsulants

Claims (8)

1. a kind of lubricant composition, it is characterised in that the dispersant containing base oil, thickener and more than 0.5wt%,
The dispersant contains the copolymerization of carboxylic metallic salt, the metal salt of polybasic carboxylic acid and carboxylic metallic salt and hydrocarbon compound Either one in thing.
2. lubricant composition according to claim 1, it is characterised in that the carboxylic metallic salt and the polybasic carboxylic acid Metal salt at least one party be the alkali metal salt containing at least one of sodium salt, lithium salts, sylvite or containing magnesium salts, calcium The alkali salt of at least one of salt.
3. lubricant composition according to claim 1 or 2, it is characterised in that form the carboxylic metallic salt and hydrocarbonylation The carboxylic metallic salt of the copolymer of compound is the alkali metal salt containing at least one of sodium salt, lithium salts, sylvite or contained There is the alkali salt of at least one of magnesium salts, calcium salt.
4. according to lubricant composition according to any one of claims 1 to 3, it is characterised in that the content of the dispersant For below 10wt%.
5. according to lubricant composition according to any one of claims 1 to 3, it is characterised in that under the thickener contains Two carbamide compounds of formula (1) expression are stated,
R1-NHCONH-R2-NHCONH-R3···(1)
Wherein, R1、R2、R3It is the alkyl in aliphatic alkyl, alicyclic alkyl, aromatic hydrocarbyl.
6. a kind of lubricant composition, it is characterised in that two carbamide compounds represented containing base oil, comprising following formulas (1) Thickener and 0.5wt%~10% dispersant,
The dispersant contains the copolymer of the sodium salt of decanedioic acid, the sodium salt of polyacrylic acid and maleic acid sodium salt and isobutene In either one,
R1-NHCONH-R2-NHCONH-R3···(1)
Wherein, R1、R2、R3It is the alkyl in aliphatic alkyl, alicyclic alkyl, aromatic hydrocarbyl.
7. a kind of rolling bearing, it is characterised in that enclosed lubricant composition according to any one of claims 1 to 6.
8. a kind of motor, it is characterised in that possess the rolling bearing described in claim 7.
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