WO2016114380A1 - Palier anti-frottement - Google Patents

Palier anti-frottement Download PDF

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Publication number
WO2016114380A1
WO2016114380A1 PCT/JP2016/051088 JP2016051088W WO2016114380A1 WO 2016114380 A1 WO2016114380 A1 WO 2016114380A1 JP 2016051088 W JP2016051088 W JP 2016051088W WO 2016114380 A1 WO2016114380 A1 WO 2016114380A1
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WO
WIPO (PCT)
Prior art keywords
alkanolamine
rolling bearing
base oil
molybdate
parts
Prior art date
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PCT/JP2016/051088
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English (en)
Japanese (ja)
Inventor
元博 伊藤
涼太 近藤
川村　隆之
石田　光
直明 辻
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Ntn株式会社
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Publication of WO2016114380A1 publication Critical patent/WO2016114380A1/fr

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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
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • 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
    • 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
    • C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
    • C10M107/02—Hydrocarbon polymers; Hydrocarbon polymers modified by oxidation
    • 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
    • C10M115/00—Lubricating compositions characterised by the thickener being a non-macromolecular organic compound other than a carboxylic acid or salt thereof
    • C10M115/08—Lubricating compositions characterised by the thickener being a non-macromolecular organic compound other than a carboxylic acid or salt thereof containing nitrogen
    • 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
    • C10M125/00—Lubricating compositions characterised by the additive being an inorganic 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
    • C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
    • C10M133/04—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M133/12—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to a carbon atom of a six-membered aromatic ring
    • C10M133/14—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to a carbon atom of a six-membered aromatic ring containing hydroxy groups

Definitions

  • the present invention relates to a grease-lubricated rolling bearing, and more particularly to a rolling bearing using a cage made of two synthetic resin annular bodies facing in the axial direction.
  • a rolling bearing is composed of an inner ring, an outer ring, a plurality of rolling elements interposed between the inner ring and the outer ring, and a cage that holds the rolling elements. Grease is sealed around the rolling elements and lubricated. ing.
  • a cage made of a synthetic resin that is lighter and lighter than a metal cage may be used.
  • this synthetic resin cage for example, it is composed of two synthetic resin-made annular bodies facing each other in the axial direction, and a plurality of pockets for accommodating balls as rolling elements on each opposed surface of the two annular bodies. Has been proposed (see Patent Document 1).
  • a grease reservoir having a rectangular cross section for storing grease is formed at both ends in the circumferential direction of each pocket, and concave spherical surfaces along the outer periphery of the ball are formed at both ends in the axial direction of each pocket.
  • a concave spherical surface is formed along the outer circumference of each ball at the both ends in the circumferential direction of each pocket that accommodates the ball of the ball bearing, and at each axial end of each pocket.
  • a cylindrical surface extending in the radial direction of the cage is formed along the outer periphery of the ball (see Patent Document 2).
  • both ends in the axial direction of the pocket are cylindrical surfaces extending in the radial direction of the cage, so that the pocket moves to the outer diameter side when the cage is expanded in diameter, and the cage
  • both ends of the cage pockets in the axial direction hardly interfere with the balls.
  • Patent Document 3 As a method for suppressing such a specific peeling phenomenon accompanied with a white tissue change that occurs at an early stage, for example, a method of adding a passivating agent to grease (see Patent Document 3) or a method of adding bismuth dithiocarbamate (See Patent Document 4).
  • a grease composition used for a rolling bearing in which an alkanolamine derivative modified with a hydrophilic group is blended as a hydrophilic organic inhibitor (see Patent Document 5).
  • This alkanolamine derivative is a salt of an acid such as dibasic acid such as dodecanoic acid or sebacic acid or boric acid and an alkanolamine such as diethanolamine, aminotetrazole or diethylaminoethanol.
  • a cage made of synthetic resin is more silent than a cage made of metal.
  • a cage (matching cage) made of two synthetic resin annular bodies facing each other in the axial direction the possibility of abnormal noise cannot be excluded depending on the usage conditions and grease used.
  • the cage may vibrate during the rotation of the bearing to generate abnormal noise. This is considered to be caused by the rotation of the ball being transmitted to the cage through grease and vibrated. That is, when both axial ends of the pocket are cylindrical surfaces, the grease enclosed in the bearing space between the inner ring and the outer ring excessively penetrates between the cylindrical surface of the cage pocket and the outer peripheral surface of the ball.
  • the cage is dragged by the surface of the ball that is rotating through the grease, and the cage is vibrated. The presence or absence of such abnormal noise can vary depending on the type of grease.
  • the present invention has been made to address such problems, and aims to provide a rolling bearing capable of preventing occurrence of abnormal noise while effectively preventing separation on the bearing rolling surface due to hydrogen embrittlement. To do.
  • the rolling bearing of the present invention comprises an inner ring and an outer ring, a plurality of rolling elements interposed between the inner and outer rings, and a cage for holding the rolling elements, and a grease composition is enclosed around the rolling elements.
  • the grease composition includes a base oil, a thickener, and at least one additive selected from alkanolamines and molybdates, and the base oil operates at 40 ° C.
  • Poly- ⁇ -olefin oil hereinafter also referred to as “PAO”) having a viscosity of 30 to 70 mm 2 / s
  • the thickener is a diurea compound obtained by reacting a diisocyanate component with a monoamine component.
  • the monoamine component is an aliphatic monoamine and an alicyclic monoamine, and the additive is added in an amount of 0.1 to 100 parts by weight with respect to 100 parts by weight of the total amount of the base oil and the thickener. 10 parts by weight is included.
  • the alkanolamine is a dialkanolamine or trialkanolamine. In particular, it is characterized by being diethanolamine.
  • the additive contains only the alkanolamine, and the alkanolamine is contained in 2 to 8 parts by weight with respect to 100 parts by weight of the total amount of the base oil and the thickener.
  • the alkanolamine is a dialkanolamine or trialkanolamine.
  • the additive contains only the molybdate, and the molybdate is contained in an amount of 0.5 to 3 parts by weight with respect to 100 parts by weight of the total amount of the base oil and the thickener. To do.
  • the molybdate is sodium molybdate.
  • the cage is composed of two synthetic resin annular bodies facing each other in the axial direction, and a plurality of pockets for accommodating the rolling elements are spaced apart in the circumferential direction on each facing surface of the two annular bodies. It is characterized by being formed.
  • the rolling bearing of the present invention comprises a predetermined grease composition that uses a PAO having a kinematic viscosity at 40 ° C. of 30 to 70 mm 2 / s as a base oil and an aliphatic / alicyclic diurea compound as a thickener.
  • the base grease is mixed with alkanolamine as an additive to effectively prevent peeling on the rolling surface of the bearing due to hydrogen embrittlement, and abnormal noise when using a plastic mating cage Can be prevented.
  • FIG. 2 is a partial cross-sectional view of the cage in FIG. 1 in the circumferential direction.
  • the grease composition used for the rolling bearing of the present invention contains a base oil, a thickener, and alkanolamine and / or molybdate as additives.
  • alkanolamine is added as an additive, even if the oil film becomes thin under severe conditions (boundary lubrication conditions) on the rolling surface, the alkanolamine on the frictional wear surface or the new ferrous metal surface exposed by wear By adsorbing, it is possible to prevent direct contact between the new ferrous metal surface and the grease.
  • molybdate is blended, the molybdate decomposes and reacts on the new surface of the iron-based metal, and a molybdenum compound film is formed together with iron oxide.
  • alkanolamine used in the grease composition examples include primary alkanolamines such as monoisopropanolamine, monoethanolamine, and mono-n-propanolamine, secondary alkanolamines such as N-alkylmonoethanolamine, and N-alkylmonopropanolamine. And tertiary alkanolamines such as alkanolamines, triethanolamine, cyclohexyldiethanolamine, tri (n-propanol) amine, triisopropanolamine, N, N-dialkylethanolamine, and N-alkyl (or alkenyl) diethanolamine.
  • primary alkanolamines such as monoisopropanolamine, monoethanolamine, and mono-n-propanolamine
  • secondary alkanolamines such as N-alkylmonoethanolamine, and N-alkylmonopropanolamine.
  • tertiary alkanolamines such as alkanolamines,
  • iron ions are sandwiched by chelating action of a plurality of hydroxyl groups (alkanol groups) and amino groups, and iron It is preferable to use dialkanolamine or trialkanolamine because it is easy to prevent exposure of the new metal surface.
  • N-alkyl (or alkenyl) diethanolamine of the following formula (1) because it is excellent in compatibility with the base oil, the ability to prevent the peeling phenomenon, and is excellent in availability.
  • R 1 represents a linear or branched alkyl group or alkenyl group having 1 to 20 carbon atoms.
  • the number of carbon atoms is preferably 1 to 12, and more preferably 1 to 8.
  • Specific examples of the compound include N-methyldiethanolamine, N-ethyldiethanolamine, N-propyldiethanolamine, N-butyldiethanolamine, N-pentyldiethanolamine, N-hexyldiethanolamine, N-heptyldiethanolamine, N-octyldiethanolamine, N -Nonyldiethanolamine, N-decyldiethanolamine, N-undecyldiethanolamine, N-lauryldiethanolamine, N-tridecyldiethanolamine, N-myristyldiethanolamine, N-pentadecyldiethanolamine, N-palmityldiethanolamine, N-heptadecyldiethanolamine, N -
  • Alkanolamines may be used alone or in combination of two or more.
  • the alkanolamine is preferably liquid or pasty at room temperature and operating temperature. Further, it may be dispersed in a solvent or the like. By using such an alkanolamine, it is difficult to adversely affect the quietness of the bearing. Further, even when the oil film on the rolling surface becomes thin, it is easy to enter the portion.
  • the kinematic viscosity of alkanolamine is preferably 10 to 100 mm 2 / s at 40 ° C., more preferably 40 to 70 mm 2 / s at 40 ° C.
  • alkanolamine tertiary diethanolamine
  • examples of commercially available products of alkanolamine include ADEKA CLUBE FM-812 and ADEKA CLUOVE FM-832 manufactured by ADEKA.
  • the molybdate used in the grease composition is preferably a metal salt.
  • the metal constituting the metal salt include sodium, potassium, lithium, magnesium, calcium, copper, zinc, barium and the like. Since it is easy to form the above-mentioned molybdenum compound film, it is preferable to use an alkali metal salt of molybdate. Specific examples include lithium molybdate, sodium molybdate, and potassium molybdate. Molybdate may be used alone or in combination of two or more.
  • the blending ratio of at least one additive selected from alkanolamine and molybdate is 0.1 to 10 parts by weight with respect to 100 parts by weight of the total amount of base oil and thickener.
  • the total amount is within this range.
  • the molybdate which is a solid is made into a small quantity compared with alkanolamine which is liquid. For example, (1) when only the alkanolamine is included as the additive, it is 2 to 8 parts by weight with respect to 100 parts by weight of the total amount of the base oil and the thickener, and (2) only the molybdate as the additive.
  • containing only alkanolamine as the additive means that alkanolamine is selected in at least one additive selected from alkanolamine and molybdate, and molybdate is not included. It does not exclude the addition of other additives. The same applies to the selection of molybdate.
  • the base oil of the grease composition is composed of PAO which is a synthetic hydrocarbon oil.
  • PAO is a mixture of oligomers or polymers of ⁇ -olefins or isomerized ⁇ -olefins.
  • Specific examples of the ⁇ -olefin include 1-octene, 1-nonene, 1-decene, 1-dodecene, 1-tridecene, 1-tetradecene, 1-pentadecene, 1-hexadecene, 1-heptadecene, 1-octadecene, -Nonadecene, 1-eicosene, 1-docosene, 1-tetradocosene and the like, and usually a mixture thereof is used.
  • This base oil has a kinematic viscosity at 40 ° C. of 30 to 70 mm 2 / s, more preferably 30 to 60 mm 2 / s.
  • the kinematic viscosity at 40 ° C. is less than 30 mm 2 / s, the viscosity is too low to easily cause an oil film breakage, and the oil evaporation increases.
  • the kinematic viscosity at 40 ° C. is higher than 70 mm 2 / s, there is a risk of generating abnormal noise or increasing rotational torque.
  • the kinematic viscosity of the mixed oil is set within the above range.
  • the thickener of the above grease composition is an aliphatic / alicyclic diurea compound among urea compounds.
  • a urea compound is obtained by reacting a polyisocyanate component and a monoamine component.
  • the aliphatic / alicyclic diurea compound is obtained by using diisocyanate as the polyisocyanate component and using an aliphatic monoamine and an alicyclic monoamine as the monoamine component.
  • the aliphatic / alicyclic diurea compound obtained mainly from an aliphatic monoamine is less likely to be excessively caught between the pocket surface of the resin-made laminated cage and the outer peripheral surface of the ball. It is preferable that there are many aliphatic monoamines.
  • the aliphatic monoamine is preferably 70 mol% or more based on the entire monoamine.
  • diisocyanate constituting the urea compound examples include phenylene diisocyanate, tolylene diisocyanate, diphenyl diisocyanate, diphenylmethane diisocyanate, octadecane diisocyanate, decane diisocyanate, and hexane diisocyanate.
  • Aliphatic monoamines include hexylamine, octylamine, dodecylamine, hexadecylamine, octadecylamine, stearylamine, oleylamine and the like. Cyclohexylamine is mentioned as an alicyclic monoamine.
  • the thickener is an aromatic diurea compound using only an aromatic monoamine as a monoamine, there is a possibility that abnormal noise may be generated.
  • Base grease can be obtained by blending thickener with base oil.
  • the base grease in the present invention is preferably prepared by reacting the diisocyanate component and the monoamine component in a base oil.
  • the blending ratio of the thickener in the base grease is 1 to 40% by mass, preferably 3 to 25% by mass. If the content of the thickener is less than 1% by mass, the thickening effect is reduced, making it difficult to form a grease. If the content exceeds 40% by mass, the obtained base grease becomes too hard and the desired effect is difficult to obtain. Become.
  • the grease composition may be prepared by first blending the alkanolamine with the base oil and using the base oil to prepare a thickener, and removing the alkanolamine to prepare the grease composition. Any method may be used in which alkanolamine is added to this after adjustment. Since the alkanolamine contains an amino group, it is preferable to add the alkanolamine after making the base grease by reacting the diisocyanate component and the monoamine component in the base oil.
  • the penetration degree (JIS K2220) of the grease composition is in the range of 200 to 350.
  • the consistency is less than 200, oil separation is small and there is a risk of poor lubrication.
  • the consistency exceeds 350, the grease is soft and easily flows out of the bearing, which is not preferable.
  • the alkanolamine is not present in the form of a reaction product like a salt with an acid, but is present as it is. Therefore, when an alkanolamine is included, an additive that forms a salt with an alkanolamine such as a fatty acid is not included as another additive.
  • the grease composition may contain a known additive as necessary within the range not impairing the object of the present invention.
  • additives include antioxidants such as organic zinc compounds, amines, and phenolic compounds, metal deactivators such as benzotriazole, viscosity index improvers such as polymethacrylate and polystyrene, molybdenum disulfide, and graphite.
  • examples thereof include solid lubricants, metal sulfonates, rust inhibitors such as polyhydric alcohol esters, oil agents such as esters and alcohols, and other antiwear agents. These can be added alone or in combination of two or more.
  • the grease composition does not contain an alkali metal salt of an inorganic acid and an alkaline earth metal salt of an inorganic acid for the purpose of preventing the generation of abnormal noise.
  • the inorganic acid include phosphoric acid (orthophosphoric acid), hydrochloric acid, nitric acid, sulfuric acid, and boric acid.
  • the alkali metal and alkaline earth metal include lithium, sodium, potassium, calcium, strontium, and barium. Is mentioned. Specific examples include tricalcium phosphate (calcium salt of orthophosphoric acid).
  • FIGS. 1 is a cross-sectional view of a deep groove ball bearing
  • FIG. 2 is a partial cross-sectional view in the circumferential direction of the cage in FIG.
  • a rolling bearing 1 includes an inner ring 2 having an inner ring rolling surface on an outer peripheral surface and an outer ring 3 having an outer ring rolling surface on an inner peripheral surface.
  • the inner ring rolling surface and the outer ring rolling are arranged concentrically.
  • a plurality of rolling elements (balls) 4 are arranged between the running surface.
  • the rolling element 4 is held by a cage 5 made of synthetic resin.
  • the retainer 5 is obtained by fixing two synthetic resin-made annular bodies 5a, 5b facing each other in the axial direction by snap fitting with claws 5d.
  • a plurality of pockets 5c for accommodating rolling elements (balls) 4 are formed on the opposing surfaces of the two annular bodies 5a and 5b at intervals in the circumferential direction.
  • the two annular bodies 5a and 5b are obtained by injection molding a synthetic resin.
  • a synthetic resin for example, a polyamide resin, a polyphenylene sulfide resin, a polyether ether ketone resin as a base resin, and a composition in which glass fibers or carbon fibers are blended can be used.
  • the two annular bodies 5a and 5b have the same shape, and can be injection-molded with the same mold.
  • the material and shape of the cage are not particularly limited, and it is not a resin-made mating cage shown in FIG. It can be applied to a cage made of steel.
  • concave spherical surfaces are formed along the outer periphery of each pocket at both ends in the circumferential direction of each pocket that accommodates the balls that are rolling elements, and both axial ends of each pocket.
  • a cylindrical surface extending in the radial direction of the cage along the outer periphery of the ball may be formed in the portion.
  • Examples 1 to 5 and Comparative Examples 1 to 4 First, the base oils were prepared by mixing them as shown in Table 1 alone or by mixing them. Next, 4,4′-diphenylmethane diisocyanate (Millionate MT manufactured by Nippon Polyurethane Industry, hereinafter referred to as “MDI”) is dissolved in half of this base oil in the ratio shown in Table 1, and the remaining half of the base oil is dissolved. A monoamine that was twice the equivalent of MDI was dissolved. A solution in which monoamine was dissolved was added while stirring the solution in which MDI was dissolved, and then the reaction was continued at 100 to 120 ° C. for 30 minutes to produce a diurea compound in the base oil to obtain a base grease.
  • MDI 4,4′-diphenylmethane diisocyanate
  • Additives were added to this at the blending ratio shown in Table 1, and the mixture was further sufficiently stirred. Thereafter, it was homogenized with three rolls to obtain a test grease. All of the added alkanolamines are diethanolamine (Adeka Cruve FM-812 manufactured by ADEKA), and the molybdate is sodium molybdate.
  • the obtained grease was subjected to a rapid acceleration / deceleration test and an acoustic measurement test. Test methods and test conditions are shown below.
  • ⁇ Rapid acceleration / deceleration test> The grease was sealed in a rolling bearing for rotating the inner ring that supports the rotating shaft (bearing steel SUJ2 for the inner ring, outer ring, and steel ball), and a rapid acceleration / deceleration test was conducted.
  • the rapid acceleration / deceleration test conditions are as follows: In the atmosphere at 25 ° C, the load is applied to the pulley attached to the tip of the rotating shaft at 1960 N, the rotation speed is set between 0 rpm and 18000 rpm, and the grease is used to promote the exposure of the new surface due to wear. 1% by mass of iron powder was mixed in, and a test was performed in a state where a current of 1.0 A flows in the test bearing (6203). Then, abnormal peeling occurred in the bearing, and the time during which the vibration of the vibration detector exceeded the set value and stopped (peeling life (h)) was measured. The results are also shown in Table 1.
  • roller bearing (6312: Resin mating cage (see Fig. 2), with cylindrical surface) filled with the above grease is incorporated in the servo motor testing machine, and a belt load of 3400N is applied by pulling the pulley attached to the shaft with a belt. Meanwhile, the rotational speed was increased from 1000 rpm to 7000 rpm in steps of 1000 rpm, and the sound (occurrence of abnormal noise) at each rotational speed was confirmed by hearing. Among the seven rotation speeds, the total number when the large abnormal noise was generated was “ ⁇ ” for zero, “ ⁇ ” for one, and “ ⁇ ” for two or more. The results are also shown in Table 1.
  • each example in which an alkanolamine (diethanolamine) or molybdate was blended with a predetermined base grease could prevent the generation of abnormal noise while extending the peeling occurrence life time.
  • the abnormal noise does not always occur when the rotational speed is high, but the test bearing having the same configuration may be generated at a low rotational speed and not at a high rotational speed.
  • the rolling bearing of the present invention can be applied to various rolling bearings because it can prevent occurrence of abnormal noise while effectively preventing separation on the bearing rolling surface due to hydrogen embrittlement.
  • it is a rolling bearing using a cage composed of two synthetic resin-made annular bodies facing each other in the axial direction, and it can be suitably used for those that may cause abnormal noise when existing grease is used.

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

Abstract

L'invention concerne un palier anti-frottement, lequel palier peut empêcher l'apparition de bruits étranges tout en évitant efficacement un décollement sur la surface de roulement du palier, dû à la fragilité en atmosphère d'hydrogène. Un palier anti-frottement (1) comporte une bague interne (2), une bague externe (3), une pluralité d'éléments de roulement (4) interposés entre les bagues interne et externe, et un dispositif de maintien (5) pour maintenir les éléments de roulement (4) ; une composition de graisse étant scellée dans les périphéries des éléments de roulement (4) ; la composition de graisse contenant une huile de base, un agent épaississant, et au moins un additif sélectionné parmi une alcanolamine et un molybdate ; l'huile de base étant une huile de poly-α-oléfine ayant une viscosité cinématique de 30 à 70 mm2/s à 40 ° C ; l'agent épaississant étant un composé de diurée aliphatique·alicyclique ; et la quantité d'additif étant de 0,1 à 10 parties en poids pour 100 parties en poids de l'huile de base et de l'agent épaississant combinés.
PCT/JP2016/051088 2015-01-16 2016-01-15 Palier anti-frottement WO2016114380A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107956793A (zh) * 2017-12-04 2018-04-24 吴银辉 一种密封性能好的推力球轴承及其应用

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116845332A (zh) 2016-07-05 2023-10-03 株式会社半导体能源研究所 电子设备、锂离子二次电池、正极活性物质及其制造方法
JP7108373B2 (ja) * 2016-10-21 2022-07-28 Ntn株式会社 玉軸受
JP7511351B2 (ja) * 2020-01-31 2024-07-05 Ntn株式会社 グリース組成物およびグリース封入軸受

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005112902A (ja) * 2003-10-03 2005-04-28 Ntn Corp グリース組成物および該グリース封入軸受
JP2006342939A (ja) * 2005-06-10 2006-12-21 Ntn Corp 一方向クラッチ内蔵型回転伝達装置
JP2007327638A (ja) * 2006-05-10 2007-12-20 Ntn Corp 一方向クラッチ
JP2008064157A (ja) * 2006-09-05 2008-03-21 Ntn Corp 合成樹脂製保持器
JP2008115304A (ja) * 2006-11-06 2008-05-22 Cosmo Sekiyu Lubricants Kk 樹脂用ウレアグリース組成物
JP2008143979A (ja) * 2006-12-07 2008-06-26 Nsk Ltd グリース組成物及び転がり軸受
JP2009108263A (ja) * 2007-10-31 2009-05-21 Nsk Ltd グリース組成物及び転がり軸受
JP2009299897A (ja) * 2009-07-22 2009-12-24 Ntn Corp 自動車電装・補機用転がり軸受

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002180077A (ja) * 2000-12-08 2002-06-26 Ntn Corp 潤滑剤組成物および軸受
JP2006316082A (ja) * 2005-05-10 2006-11-24 Ntn Corp グリース組成物およびグリース封入転がり軸受

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005112902A (ja) * 2003-10-03 2005-04-28 Ntn Corp グリース組成物および該グリース封入軸受
JP2006342939A (ja) * 2005-06-10 2006-12-21 Ntn Corp 一方向クラッチ内蔵型回転伝達装置
JP2007327638A (ja) * 2006-05-10 2007-12-20 Ntn Corp 一方向クラッチ
JP2008064157A (ja) * 2006-09-05 2008-03-21 Ntn Corp 合成樹脂製保持器
JP2008115304A (ja) * 2006-11-06 2008-05-22 Cosmo Sekiyu Lubricants Kk 樹脂用ウレアグリース組成物
JP2008143979A (ja) * 2006-12-07 2008-06-26 Nsk Ltd グリース組成物及び転がり軸受
JP2009108263A (ja) * 2007-10-31 2009-05-21 Nsk Ltd グリース組成物及び転がり軸受
JP2009299897A (ja) * 2009-07-22 2009-12-24 Ntn Corp 自動車電装・補機用転がり軸受

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107956793A (zh) * 2017-12-04 2018-04-24 吴银辉 一种密封性能好的推力球轴承及其应用

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