JP2016133143A - Rolling bearing - Google Patents
Rolling bearing Download PDFInfo
- Publication number
- JP2016133143A JP2016133143A JP2015006733A JP2015006733A JP2016133143A JP 2016133143 A JP2016133143 A JP 2016133143A JP 2015006733 A JP2015006733 A JP 2015006733A JP 2015006733 A JP2015006733 A JP 2015006733A JP 2016133143 A JP2016133143 A JP 2016133143A
- Authority
- JP
- Japan
- Prior art keywords
- rolling bearing
- thickener
- alkanolamine
- base oil
- rolling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 65
- 239000004519 grease Substances 0.000 claims abstract description 56
- 239000002199 base oil Substances 0.000 claims abstract description 33
- 239000002562 thickening agent Substances 0.000 claims abstract description 26
- 239000000654 additive Substances 0.000 claims abstract description 25
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 230000000996 additive effect Effects 0.000 claims abstract description 20
- -1 aliphatic alicyclic diurea compound Chemical class 0.000 claims abstract description 17
- 239000003921 oil Substances 0.000 claims abstract description 13
- 229920013639 polyalphaolefin Polymers 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims description 28
- 125000001931 aliphatic group Chemical group 0.000 claims description 11
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical group OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 9
- 125000005442 diisocyanate group Chemical group 0.000 claims description 6
- 125000002723 alicyclic group Chemical group 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 8
- 239000001257 hydrogen Substances 0.000 abstract description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 7
- 150000001412 amines Chemical class 0.000 abstract description 3
- 150000001875 compounds Chemical class 0.000 abstract description 3
- 238000004299 exfoliation Methods 0.000 abstract description 2
- 230000002159 abnormal effect Effects 0.000 description 20
- 206010040844 Skin exfoliation Diseases 0.000 description 15
- 238000012360 testing method Methods 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000002184 metal Substances 0.000 description 11
- 239000002585 base Substances 0.000 description 10
- 229920003002 synthetic resin Polymers 0.000 description 10
- 239000000057 synthetic resin Substances 0.000 description 10
- 238000002156 mixing Methods 0.000 description 7
- 150000003839 salts Chemical class 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000013011 mating Effects 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 229910052783 alkali metal Inorganic materials 0.000 description 3
- 125000003342 alkenyl group Chemical group 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 150000007522 mineralic acids Chemical class 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000004711 α-olefin Substances 0.000 description 3
- VQOXUMQBYILCKR-UHFFFAOYSA-N 1-Tridecene Chemical compound CCCCCCCCCCCC=C VQOXUMQBYILCKR-UHFFFAOYSA-N 0.000 description 2
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- SPURMHFLEKVAAS-UHFFFAOYSA-N 1-docosene Chemical compound CCCCCCCCCCCCCCCCCCCCC=C SPURMHFLEKVAAS-UHFFFAOYSA-N 0.000 description 2
- CRSBERNSMYQZNG-UHFFFAOYSA-N 1-dodecene Chemical compound CCCCCCCCCCC=C CRSBERNSMYQZNG-UHFFFAOYSA-N 0.000 description 2
- ADOBXTDBFNCOBN-UHFFFAOYSA-N 1-heptadecene Chemical compound CCCCCCCCCCCCCCCC=C ADOBXTDBFNCOBN-UHFFFAOYSA-N 0.000 description 2
- GQEZCXVZFLOKMC-UHFFFAOYSA-N 1-hexadecene Chemical compound CCCCCCCCCCCCCCC=C GQEZCXVZFLOKMC-UHFFFAOYSA-N 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N 1-nonene Chemical compound CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 2
- PJLHTVIBELQURV-UHFFFAOYSA-N 1-pentadecene Chemical compound CCCCCCCCCCCCCC=C PJLHTVIBELQURV-UHFFFAOYSA-N 0.000 description 2
- HFDVRLIODXPAHB-UHFFFAOYSA-N 1-tetradecene Chemical compound CCCCCCCCCCCCC=C HFDVRLIODXPAHB-UHFFFAOYSA-N 0.000 description 2
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- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
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- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
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- CXZIVLHEAFSOQK-UHFFFAOYSA-K bismuth;tricarbamodithioate Chemical compound [Bi+3].NC([S-])=S.NC([S-])=S.NC([S-])=S CXZIVLHEAFSOQK-UHFFFAOYSA-K 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
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- 239000004202 carbamide Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- PAFZNILMFXTMIY-UHFFFAOYSA-N cyclohexylamine Chemical compound NC1CCCCC1 PAFZNILMFXTMIY-UHFFFAOYSA-N 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000005078 molybdenum compound Substances 0.000 description 2
- 150000002752 molybdenum compounds Chemical class 0.000 description 2
- VAMFXQBUQXONLZ-UHFFFAOYSA-N n-alpha-eicosene Natural products CCCCCCCCCCCCCCCCCCC=C VAMFXQBUQXONLZ-UHFFFAOYSA-N 0.000 description 2
- NHLUYCJZUXOUBX-UHFFFAOYSA-N nonadec-1-ene Chemical compound CCCCCCCCCCCCCCCCCC=C NHLUYCJZUXOUBX-UHFFFAOYSA-N 0.000 description 2
- CCCMONHAUSKTEQ-UHFFFAOYSA-N octadec-1-ene Chemical compound CCCCCCCCCCCCCCCCC=C CCCMONHAUSKTEQ-UHFFFAOYSA-N 0.000 description 2
- 229920001228 polyisocyanate Polymers 0.000 description 2
- 239000005056 polyisocyanate Substances 0.000 description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000011684 sodium molybdate Substances 0.000 description 2
- 235000015393 sodium molybdate Nutrition 0.000 description 2
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 2
- 235000019731 tricalcium phosphate Nutrition 0.000 description 2
- QGLWBTPVKHMVHM-KTKRTIGZSA-N (z)-octadec-9-en-1-amine Chemical compound CCCCCCCC\C=C/CCCCCCCCN QGLWBTPVKHMVHM-KTKRTIGZSA-N 0.000 description 1
- MTZUIIAIAKMWLI-UHFFFAOYSA-N 1,2-diisocyanatobenzene Chemical compound O=C=NC1=CC=CC=C1N=C=O MTZUIIAIAKMWLI-UHFFFAOYSA-N 0.000 description 1
- FJLUATLTXUNBOT-UHFFFAOYSA-N 1-Hexadecylamine Chemical compound CCCCCCCCCCCCCCCCN FJLUATLTXUNBOT-UHFFFAOYSA-N 0.000 description 1
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical compound CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 description 1
- 229940106006 1-eicosene Drugs 0.000 description 1
- FIKTURVKRGQNQD-UHFFFAOYSA-N 1-eicosene Natural products CCCCCCCCCCCCCCCCCC=CC(O)=O FIKTURVKRGQNQD-UHFFFAOYSA-N 0.000 description 1
- BMVXCPBXGZKUPN-UHFFFAOYSA-N 1-hexanamine Chemical compound CCCCCCN BMVXCPBXGZKUPN-UHFFFAOYSA-N 0.000 description 1
- AFIQCWNRHCLBIM-UHFFFAOYSA-N 2-(16-methylheptadecylamino)ethanol Chemical compound CC(C)CCCCCCCCCCCCCCCNCCO AFIQCWNRHCLBIM-UHFFFAOYSA-N 0.000 description 1
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 1
- QGZWXUNSFRIUBF-UHFFFAOYSA-N 2-[2-hydroxyethyl(nonadecyl)amino]ethanol Chemical compound CCCCCCCCCCCCCCCCCCCN(CCO)CCO QGZWXUNSFRIUBF-UHFFFAOYSA-N 0.000 description 1
- MQQOMRLSOSUMIX-UHFFFAOYSA-N 2-[2-hydroxyethyl(nonyl)amino]ethanol Chemical compound CCCCCCCCCN(CCO)CCO MQQOMRLSOSUMIX-UHFFFAOYSA-N 0.000 description 1
- NDLNTMNRNCENRZ-UHFFFAOYSA-N 2-[2-hydroxyethyl(octadecyl)amino]ethanol Chemical compound CCCCCCCCCCCCCCCCCCN(CCO)CCO NDLNTMNRNCENRZ-UHFFFAOYSA-N 0.000 description 1
- QZQNMMLYACBCMJ-UHFFFAOYSA-N 2-[2-hydroxyethyl(octyl)amino]ethanol Chemical compound CCCCCCCCN(CCO)CCO QZQNMMLYACBCMJ-UHFFFAOYSA-N 0.000 description 1
- MOVFFQCDGPWQOJ-UHFFFAOYSA-N 2-[2-hydroxyethyl(pentadecyl)amino]ethanol Chemical compound CCCCCCCCCCCCCCCN(CCO)CCO MOVFFQCDGPWQOJ-UHFFFAOYSA-N 0.000 description 1
- QATXMCVRIZSPJU-UHFFFAOYSA-N 2-[2-hydroxyethyl(pentyl)amino]ethanol Chemical compound CCCCCN(CCO)CCO QATXMCVRIZSPJU-UHFFFAOYSA-N 0.000 description 1
- OZICRFXCUVKDRG-UHFFFAOYSA-N 2-[2-hydroxyethyl(propyl)amino]ethanol Chemical compound CCCN(CCO)CCO OZICRFXCUVKDRG-UHFFFAOYSA-N 0.000 description 1
- CPHJEACXPATRSU-UHFFFAOYSA-N 2-[2-hydroxyethyl(tetradecyl)amino]ethanol Chemical compound CCCCCCCCCCCCCCN(CCO)CCO CPHJEACXPATRSU-UHFFFAOYSA-N 0.000 description 1
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- 150000003871 sulfonates Chemical class 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
- 229910000391 tricalcium phosphate Inorganic materials 0.000 description 1
- 229940078499 tricalcium phosphate Drugs 0.000 description 1
- 150000003672 ureas Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 150000003752 zinc compounds Chemical class 0.000 description 1
Images
Classifications
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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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- 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
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- 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
Landscapes
- 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)
- Rolling Contact Bearings (AREA)
- Lubricants (AREA)
Abstract
Description
本発明は、グリース潤滑される転がり軸受に関し、特に軸方向に対向する2枚の合成樹脂製の環状体からなる保持器を用いた転がり軸受に関する。 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 members facing each other in the axial direction.
一般に、転がり軸受は、内輪と、外輪と、内輪と外輪の間に介在する複数の転動体と、その転動体を保持する保持器とから構成され、転動体周囲にグリースが封入されて潤滑されている。近年、サーボモータなどに使用される転がり軸受において、金属製の保持器に対して静音性に優れ、軽量である合成樹脂製の保持器が使用される場合がある。この合成樹脂製保持器として、例えば、軸方向に対向する2枚の合成樹脂製の環状体からなり、その2枚の環状体の各対向面に、転動体である玉を収容する複数のポケットが周方向に間隔をおいて形成されているものが提案されている(特許文献1参照)。この保持器では、各ポケットの周方向両端部に、グリースを溜める矩形断面のグリース溜りが形成され、各ポケットの軸方向両端部に、玉の外周に沿う凹球面が形成されている。 In general, 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. In recent years, in a rolling bearing used for a servo motor or the like, a cage made of a synthetic resin that is lighter and lighter than a metal cage may be used. As 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). In this cage, 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.
この保持器を改良した合成樹脂製保持器として、玉軸受の玉を収容する各ポケットの周方向両端部に、玉の外周に沿った凹球面を形成するとともに、各ポケットの軸方向両端部に、玉の外周に沿って保持器の半径方向に延びる円筒面を形成したものが提案されている(特許文献2参照)。この保持器は、ポケットの軸方向両端部が、保持器の半径方向に延びる円筒面とされているため、保持器が拡径変形することによりポケットが外径側に移動する現象と、保持器のポケットが周方向に引き伸ばされることによりポケットの軸方向の幅が狭まる現象とが同時に起きたときに、保持器のポケットの軸方向両端部が玉に干渉しにくい。 As a cage made of synthetic resin, which is an improvement of this cage, 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. There has been proposed one in which a cylindrical surface extending in the radial direction of the cage is formed along the outer periphery of the ball (see Patent Document 2). In this cage, 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 When the pockets are stretched in the circumferential direction and the axial width of the pockets is simultaneously reduced, both ends of the cage pockets in the axial direction hardly interfere with the balls.
また、近年の転がり軸受では、小型化や高性能化の要求に伴なう使用条件の過酷化により、転走面に白色組織変化を伴った特異的な剥離が早期に生じるおそれがある。この特異的な剥離は、通常の金属疲労により生じる転走面内部からの剥離と異なり、転走面表面の比較的浅いところから生じる破壊現象で、グリースの分解などによって発生する水素が原因の水素脆性と考えられている。例えばグリースが分解して水素が発生し、それが転がり軸受の鋼中に侵入することで、水素脆性を起因とする早期剥離が起きると考えられる。 Further, in recent rolling bearings, there is a possibility that specific peeling accompanied by a change in white texture may occur at an early stage due to severe use conditions accompanying demands for downsizing and high performance. This specific exfoliation is a destructive phenomenon that occurs from a relatively shallow part of the surface of the rolling surface, unlike the internal peeling caused by normal metal fatigue. It is considered brittle. For example, it is considered that the grease is decomposed to generate hydrogen, which penetrates into the steel of the rolling bearing, thereby causing early peeling due to hydrogen embrittlement.
このような早期に発生する白色組織変化を伴った特異な剥離現象を抑制する方法として、例えば、グリースに不動態化剤を添加する方法(特許文献3参照)や、ビスマスジチオカーバメートを添加する方法(特許文献4参照)が提案されている。 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).
また、従来、転がり軸受に用いるグリース組成物において、親水性有機インヒビターとして親水性基で変性されたアルカノールアミン誘導体を配合したものが知られている(特許文献5参照)。このアルカノールアミン誘導体は、ドデカン酸やセバシン酸などの二塩基酸、ホウ酸などの酸と、ジエタノールアミン、アミノテトラゾール、ジエチルアミノエタノールなどのアルカノールアミンとの塩である。その他、耐熱性、機械的安定性、耐水性、防錆性、耐荷重性、難燃性などに優れた潤滑剤組成物として、鉱油や合成油からなる基油に、第三リン酸カルシウムと、ジエタノールアミン類などのグリース構造安定化剤を配合したものが提案されている(特許文献6参照)。 Conventionally, a grease composition used for a rolling bearing is known 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. In addition, as a lubricant composition with excellent heat resistance, mechanical stability, water resistance, rust resistance, load resistance, flame resistance, etc., base oil made of mineral oil or synthetic oil, tribasic calcium phosphate and diethanolamine The thing which mix | blended grease structure stabilizers, such as a kind, is proposed (refer patent document 6).
上記のように、一般的には、合成樹脂製の保持器は、金属製の保持器に対して静音性に優れる。しかし、軸方向に対向する2枚の合成樹脂製の環状体からなる保持器(合わせ保持器)とする場合、その使用条件や使用グリースによっては、異音などを生じる可能性を排除できない。特に、特許文献2のように、合わせ保持器においてポケットの軸方向両端部が円筒面とされている場合、軸受回転中に保持器が振動して異音を生じるおそれがある。これは、玉の自転運動がグリースを介して保持器に伝達して振動させることが原因であると考えられる。すなわち、ポケットの軸方向両端部を円筒面としたときに、内輪と外輪の間の軸受空間に封入されたグリースが、保持器のポケットの円筒面と玉の外周面との間に過剰に侵入し、そのグリースを介して保持器が自転中の玉の表面に引きずられ、保持器の振動が生じると考えられる。このような異音については、グリースの種類によって、その発生の有無などが変化し得る。
As described above, in general, a cage made of a synthetic resin is superior in quietness to a cage made of metal. However, in the case of 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. In particular, as in
一方、上記剥離現象に対しては、近年の転がり軸受の小型化や高性能化の要求に伴なう使用条件の更なる過酷化により、従来の特許文献3や特許文献4のような、不動態化剤やビスマスジチオカーバメートを添加する方法では対策として不十分になってきている。
On the other hand, with respect to the above peeling phenomenon, due to further severe use conditions accompanying the recent demand for miniaturization and high performance of rolling bearings, there is no problem like the conventional Patent Document 3 and
特許文献5のように、従来の一般的な転がり軸受用グリース組成物において、アルカノールアミン塩が配合されているものはあるが、アルカノールアミン単体での上記剥離現象の防止能力については検討がなされていない。また、特許文献6に記載されるグリース組成物についても、上記剥離現象の防止能力については検討がなされておらず、必須成分の具体的な組み合わせによっては、上述の異音の問題など、寧ろ悪影響を与える場合もある。
As in
本発明はこのような問題に対処するためになされたものであり、水素脆性による軸受転走面での剥離を効果的に防止しつつ、異音の発生を防止できる転がり軸受の提供を目的とする。 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.
本発明の転がり軸受は、内輪および外輪と、この内・外輪間に介在する複数の転動体と、この転動体を保持する保持器とを備え、上記転動体の周囲にグリース組成物を封入してなる転がり軸受であって、上記グリース組成物は、基油と、増ちょう剤と、アルカノールアミンおよびモリブデン酸塩から選ばれる少なくとも1つの添加剤とを含み、上記基油は、40℃における動粘度が30〜70mm2/sであるポリ−α−オレフィン油(以下、「PAO」ともいう)であり、上記増ちょう剤は、ジイソシアネート成分とモノアミン成分とを反応して得られるジウレア化合物であり、上記モノアミン成分が脂肪族モノアミンおよび脂環式モノアミンであり、上記添加剤は、上記基油および上記増ちょう剤の合計量100重量部に対して0.1〜10重量部含まれることを特徴とする。 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-α-olefin oil (hereinafter also referred to as “PAO”) having a viscosity of 30 to 70 mm 2 / s, and the thickener is a diurea compound obtained by reacting a diisocyanate component and a monoamine component. , The monoamine component is an aliphatic monoamine and an alicyclic monoamine, and the additive is 0.1 to 0.1 parts by weight based on 100 parts by weight of the total amount of the base oil and the thickener. 10 parts by weight is included.
上記アルカノールアミンが、ジアルカノールアミンまたはトリアルカノールアミンであることを特徴とする。特に、ジエタノールアミンであることを特徴とする。 The alkanolamine is a dialkanolamine or a trialkanolamine. In particular, it is characterized by being diethanolamine.
上記添加剤として上記アルカノールアミンのみを含み、該アルカノールアミンが、上記基油および上記増ちょう剤の合計量100重量部に対して2〜8重量部含まれる、または、上記添加剤として上記モリブデン酸塩のみを含み、該モリブデン酸塩が、上記基油および上記増ちょう剤の合計量100重量部に対して0.5〜3重量部含まれる。 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, or the molybdic acid as the additive. Only the salt is contained, and the molybdate is contained in an amount of 0.5 to 3 parts by weight based on 100 parts by weight of the total amount of the base oil and the thickener.
上記保持器が、軸方向に対向する2枚の合成樹脂製の環状体からなり、その2枚の環状体の各対向面に、上記転動体を収容する複数のポケットが周方向に間隔をおいて形成されていることを特徴とする。 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.
本発明の転がり軸受は、封入するグリース組成物について、基油として40℃における動粘度が30〜70mm2/sのPAOを、増ちょう剤として脂肪族・脂環式ジウレア化合物を用いた所定のベースグリースに、添加剤としてアルカノールアミンを配合した構成とすることで、水素脆性による軸受転走面での剥離を効果的に防止しつつ、樹脂製の合わせ保持器を用いた場合などにおける異音の発生を防止できる。 The rolling bearing of the present invention is a grease composition to be encapsulated in which a PAO having a kinematic viscosity at 40 ° C. of 30 to 70 mm 2 / s is used as a base oil, and an aliphatic / alicyclic diurea compound is used 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.
本発明の転がり軸受に用いるグリース組成物は、基油と、増ちょう剤と、添加剤であるアルカノールアミンおよび/またはモリブデン酸塩とを含む。添加剤について、アルカノールアミンを配合する場合、転走面における過酷条件下(境界潤滑条件)で油膜が薄くなる場合であっても、摩擦摩耗面または摩耗により露出した鉄系金属新生面において、アルカノールアミンが吸着などすることで、鉄系金属新生面とグリースとの直接接触を防止できる。また、モリブデン酸塩を配合する場合、上記の鉄系金属新生面においてモリブデン酸塩が分解・反応し、酸化鉄とともにモリブデン化合物被膜が生成される。これらにより、グリースの分解による水素の発生を抑制して、水素脆性による特異な剥離を防止し得る。さらに、本発明では、これらの添加剤の配合量を所定量範囲に限定し、組み合わせる基油と増ちょう剤(ベースグリース)の種類を選定することで、樹脂製の合わせ保持器を用いた場合などにおける異音の発生を防止し得る。これは、グリースが、上記保持器のポケット面と玉外周面との間に過剰に巻き込まれることを防止できていること等に起因していると考えられる。 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. When 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. When 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. By these, generation | occurrence | production of hydrogen by decomposition | disassembly of a grease can be suppressed and peculiar peeling by hydrogen embrittlement can be prevented. Furthermore, in the present invention, when the amount of these additives is limited to a predetermined range and the type of base oil and thickener (base grease) to be combined is selected, a resin-made combined cage is used. It is possible to prevent the generation of abnormal noise. This is considered to be due to the fact that grease can be prevented from being excessively caught between the pocket surface of the cage and the outer peripheral surface of the ball.
上記グリース組成物に用いるアルカノールアミンとしては、モノイソプロパノールアミン、モノエタノールアミン、およびモノ−n−プロパノールアミンなどの一級アルカノールアミン、N−アルキルモノエタノールアミン、およびN−アルキルモノプロパノールアミンなどの二級アルカノールアミン、トリエタノールアミン、シクロヘキシルジエタノールアミン、トリ(n−プロパノール)アミン、トリイソプロパノールアミン、N,N−ジアルキルエタノールアミン、およびN−アルキル(又はアルケニル)ジエタノールアミンなどの三級アルカノールアミンが挙げられる。また、アルカノール基の数により、モノアルカノールアミン、ジアルカノールアミン、トリアルカノールアミンに分類されるが、本発明では複数のヒドロキシル基(アルカノール基)とアミノ基のキレート作用により、鉄イオンを挟み込み、鉄系金属新生面の露出を防止しやすいことから、ジアルカノールアミンまたはトリアルカノールアミンを用いることが好ましい。 Examples of the alkanolamine used in the grease composition include primary alkanolamines such as monoisopropanolamine, monoethanolamine, and mono-n-propanolamine, secondary alkanolamines such as N-alkylmonoethanolamine, and N-alkylmonopropanolamine. Examples include tertiary alkanolamines such as alkanolamines, triethanolamine, cyclohexyldiethanolamine, tri (n-propanol) amine, triisopropanolamine, N, N-dialkylethanolamine, and N-alkyl (or alkenyl) diethanolamine. Moreover, it is classified into monoalkanolamine, dialkanolamine, and trialkanolamine according to the number of alkanol groups. In the present invention, 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.
上記の中でも、基油との相溶性と剥離現象の防止能力に優れ、入手性にも優れることから、下記式(1)のN−アルキル(又はアルケニル)ジエタノールアミンを用いることが好ましい。 Among these, it is preferable to use N-alkyl (or alkenyl) diethanolamine of the following formula (1) because it is excellent in compatibility with the base oil and the ability to prevent the peeling phenomenon, and is also highly available.
式中のR1は、炭素原子数1〜20の直鎖もしくは分枝状のアルキル基またはアルケニル基を示す。また、炭素原子数は1〜12が好ましく、1〜8がより好ましい。具体的な化合物としては、例えば、N−メチルジエタノールアミン、N−エチルジエタノールアミン、N−プロピルジエタノールアミン、N−ブチルジエタノールアミン、N−ペンチルジエタノールアミン、N−ヘキシルジエタノールアミン、N−ヘプチルジエタノールアミン、N−オクチルジエタノールアミン、N−ノニルジエタノールアミン、N−デシルジエタノールアミン、N−ウンデシルジエタノールアミン、N−ラウリルジエタノールアミン、N−トリデシルジエタノールアミン、N−ミリスチルジエタノールアミン、N−ペンタデシルジエタノールアミン、N−パルミチルジエタノールアミン、N−ヘプタデシルジエタノールアミン、N−オレイルジエタノールアミン、N−ステアリルジエタノールアミン、N−イソステアリルジエタノールアミン、N−ノナデシルジエタノールアミン、N−エイコシルジエタノールアミンなどが挙げられる。 R 1 in the formula represents a linear or branched alkyl group or alkenyl group having 1 to 20 carbon atoms. Moreover, 1-12 are preferable and, as for carbon atom number, 1-8 are more preferable. 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 -Oleyl diethanolamine, N-stearyl diethanolamine, N-isostearyl Ethanolamine, N- nonadecyl diethanolamine, N- such eicosyl diethanolamine.
アルカノールアミンは、1種単独で用いても2種類以上を組み合わせて用いてもよい。また、アルカノールアミンは、室温および使用温度で液状またはペースト状のものが好ましい。また、溶剤などに分散された状態であってもよい。このようなアルカノールアミンを用いることで、軸受の静音性に悪影響を与えにくい。また、転走面の油膜が薄くなる場合でも該部分に入り込みやすい。アルカノールアミンの動粘度としては、40℃において10〜100mm2/sが好ましく、40℃において40〜70mm2/sがより好ましい。 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 the alkanolamine, preferably 10 to 100 mm 2 / s at 40 ° C., and more preferably 40~70mm 2 / s at 40 ° C..
アルカノールアミン(三級ジエタノールアミン)の市販品としては、例えば、ADEKA社製のアデカキクルーブFM−812、アデカキクルーブFM−832などが挙げられる。 Examples of commercially available products of alkanolamine (tertiary diethanolamine) include ADEKA COLUMB FM-812 and ADEKA COLUMB FM-832 manufactured by ADEKA.
上記グリース組成物に用いるモリブデン酸塩は、金属塩であることが好ましい。金属塩を構成する金属としては、ナトリウム、カリウム、リチウム、マグネシウム、カルシウム、銅、亜鉛、バリウムなどが例示できる。上述のモリブデン化合物被膜を形成しやすいことから、モリブデン酸塩のアルカリ金属塩とすることが好ましい。具体的には、モリブデン酸リチウム、モリブデン酸ナトリウム、モリブデン酸カリウムなどが挙げられる。モリブデン酸塩は、1種単独で用いても2種類以上を組み合わせて用いてもよい。 The molybdate used in the grease composition is preferably a metal salt. Examples of 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.
上記グリース組成物において、アルカノールアミンおよびモリブデン酸塩から選ばれる少なくとも1つの添加剤の配合割合は、基油と増ちょう剤の合計量100重量部に対して0.1〜10重量部とする。アルカノールアミンとモリブデン酸塩を併用する場合は、合計量をこの範囲とする。また、異音の発生をより抑制するため、固体状であるモリブデン酸塩は、液状等であるアルカノールアミンと比較して少量とすることが好ましい。例えば、(1)上記添加剤としてアルカノールアミンのみを含む場合、基油および増ちょう剤の合計量100重量部に対して2〜8重量部とし、(2)上記添加剤としてモリブデン酸塩のみを含む場合、基油および増ちょう剤の合計量100重量部に対して0.5〜3重量部とすることが好ましい。この(1)または(2)の範囲とし、基油と増ちょう剤を所定のものとすることで、後述の実施例に示すように、剥離発生を防止しながら、異音の発生を防止できる。なお、「上記添加剤としてアルカノールアミンのみを含む」とは、アルカノールアミンおよびモリブデン酸塩から選ばれる少なくとも1つの添加剤において、アルカノールアミンを選択することを意味し、モリブデン酸塩は含まないが、これら以外の他の添加剤の配合を除外するものではない。モリブデン酸塩を選択する場合も同様である。 In the above grease composition, 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. When alkanolamine and molybdate are used in combination, the total amount is within this range. Moreover, in order to suppress generation | occurrence | production of abnormal noise more, it is preferable that 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. When included, it is preferably 0.5 to 3 parts by weight based on 100 parts by weight of the total amount of base oil and thickener. By making the range of (1) or (2) and the base oil and the thickener predetermined, it is possible to prevent the generation of abnormal noise while preventing the occurrence of peeling as shown in the examples described later. . In addition, “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.
上記グリース組成物の基油は、合成炭化水素油であるPAOからなる。PAOは、α−オレフィンまたは異性化されたα−オレフィンのオリゴマーまたはポリマーの混合物である。α−オレフィンの具体例としては、1−オクテン、1−ノネン、1−デセン、1−ドデセン、1−トリデセン、1−テトラデセン、1−ペンタデセン、1−ヘキサデセン、1−ヘプタデセン、1−オクタデセン、1−ノナデセン、1−エイコセン、1−ドコセン、1−テトラドコセンなどが挙げられ、通常はこれらの混合物が使用される。 The base oil of the grease composition is composed of PAO which is a synthetic hydrocarbon oil. PAO is a mixture of α-olefins or isomerized α-olefin oligomers or polymers. Specific examples of the α-olefin include 1-octene, 1-nonene, 1-decene, 1-dodecene, 1-tridecene, 1-tetradecene, 1-pentadecene, 1-hexadecene, 1-heptadecene, 1-octadecene, 1 -Nonadecene, 1-eicosene, 1-docosene, 1-tetradocosene, etc. are mentioned, Usually, these mixtures are used.
この基油は、40℃における動粘度が30〜70mm2/sであり、より好ましくは30〜60mm2/sである。40℃における動粘度が30mm2/s 未満の場合は粘度が低すぎて油膜切れを起こしやすくなり、また油の蒸発も多くなる。一方、40℃における動粘度が70mm2/s より高いと、異音の発生や回転トルクの増加のおそれがある。動粘度の異なる複数種のPAOの混合油とする場合は、その混合油の動粘度が上記範囲となるようにする。 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. When 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. On the other hand, if 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. When a mixed oil of a plurality of types of PAOs having different kinematic viscosities is used, the kinematic viscosity of the mixed oil is set within the above range.
上記グリース組成物の増ちょう剤は、ウレア化合物のうち、脂肪族・脂環式ジウレア化合物とする。ウレア化合物は、ポリイソシアネート成分とモノアミン成分とを反応して得られる。脂肪族・脂環式ジウレア化合物は、ポリイソシアネート成分としてジイソシアネートを用い、モノアミン成分として脂肪族モノアミンと脂環式モノアミンを用いて得られる。上記モノアミン成分のうち、脂肪族モノアミンを主成分として得られる脂肪族・脂環式ジウレア化合物は、樹脂製の合わせ保持器のポケット面と玉外周面との間に過剰に巻き込まれにくくなるため、脂肪族モノアミンが多いことが好ましい。具体的には、モノアミン全体に対して、脂肪族モノアミンを70モル%以上とすることが好ましい。 The thickener of the 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. Among the above monoamine components, 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. Specifically, the aliphatic monoamine is preferably 70 mol% or more based on the entire monoamine.
ウレア化合物を構成するジイソシアネートとしては、フェニレンジイソシアネート、トリレンジイソシアネート、ジフェニルジイソシアネート、ジフェニルメタンジイソシアネート、オクタデカンジイソシアネート、デカンジイソシアネート、ヘキサンジイソシアネー卜などが挙げられる。脂肪族モノアミンとしては、ヘキシルアミン、オクチルアミン、ドデシルアミン、ヘキサデシルアミン、オクタデシルアミン、ステアリルアミン、オレイルアミンなどが挙げられる。脂環式モノアミンとしては、シクロヘキシルアミンが挙げられる。なお、増ちょう剤がモノアミンとして芳香族モノアミンのみを用いる芳香族ジウレア化合物の場合は、異音が発生するおそれがある。 Examples of the diisocyanate constituting the urea compound 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. In addition, when 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.
基油に増ちょう剤を配合してベースグリースが得られる。本発明におけるベースグリースは、基油中で上記ジイソシアネート成分とモノアミン成分とを反応させて作製することが好ましい。ベースグリース中に占める増ちょう剤の配合割合は、1〜40質量%、好ましくは3〜25質量%である。増ちょう剤の含有量が1質量%未満では、増ちょう効果が少なくなり、グリース化が困難となり、40質量%をこえると得られたベースグリースが硬くなりすぎ、所期の効果が得られ難くなる。 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.
アルカノールアミンを含める場合の上記グリース組成物の作製方法としては、まず、基油にアルカノールアミンを配合し、この基油を用いて増ちょう剤を作製する方法、アルカノールアミンを除いてグリース組成物を調整した後にこれにアルカノールアミンを加える方法のいずれであってもよい。アルカノールアミンがアミノ基を含むので、基油中で上記ジイソシアネート成分とモノアミン成分とを反応させてベースグリースを作製した後に、アルカノールアミンを添加することが好ましい方法である。 When the alkanolamine is included, 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.
上記グリース組成物の混和ちょう度(JIS K 2220)は、200〜350の範囲にあることが好ましい。ちょう度が200未満である場合は、油分離が小さく潤滑不良となるおそれがある。一方、ちょう度が350をこえる場合は、グリースが軟質で軸受外に流出しやすくなり好ましくない。 It is preferable that the penetration degree (JIS K 2220) of the grease composition is in the range of 200 to 350. When the consistency is less than 200, oil separation is small and there is a risk of poor lubrication. On the other hand, if the consistency exceeds 350, the grease is soft and easily flows out of the bearing, which is not preferable.
本発明の転がり軸受に用いるグリース組成物中において、アルカノールアミンは、酸との塩のように反応生成物の形ではなく、そのままの状態で存在している。よって、アルカノールアミンを含む場合、他の添加剤として、脂肪酸などのアルカノールアミンと塩を形成するような添加剤は含まないようにする。上記グリース組成物には、このような本発明の目的を損なわない範囲で、必要に応じて公知の添加剤を含有させてもよい。添加剤としては、例えば、有機亜鉛化合物、アミン系、フェノール系化合物などの酸化防止剤、ベンゾトリアゾールなどの金属不活性剤、ポリメタクリレート、ポリスチレンなどの粘度指数向上剤、二硫化モリブデン、グラファイトなどの固体潤滑剤、金属スルホネート、多価アルコールエステルなどの防錆剤、エステル、アルコールなどの油性剤、他の摩耗防止剤などが挙げられる。これらを単独で、または2種類以上組み合せて添加できる。 In the grease composition used for the rolling bearing of the present invention, the alkanolamine is present as it is, not in the form of a reaction product like a salt with an acid. 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. Examples of 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.
また、上記グリース組成物には、異音の発生を防止する等の目的で、無機酸のアルカリ金属塩および無機酸のアルカリ土類金属塩を含まないことが好ましい。ここで、無機酸としては、リン酸(オルトリン酸)、塩酸、硝酸、硫酸、ホウ酸などが挙げられ、アルカリ金属およびアルカリ土類金属としては、リチウム、ナトリウム、カリウム、カルシウム、ストロンチウム、バリウムなどが挙げられる。具体的には、第三リン酸カルシウム(オルトリン酸のカルシウム塩)などが挙げられる。 The grease composition preferably 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. Here, examples of the inorganic acid include phosphoric acid (orthophosphoric acid), hydrochloric acid, nitric acid, sulfuric acid, and boric acid. Examples of 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).
本発明の転がり軸受の一例を図1および図2に基づいて説明する。図1は深溝玉軸受の断面図であり、図2は図1における保持器の周方向一部断面図である。図1に示すように、転がり軸受1は、外周面に内輪転走面を有する内輪2と内周面に外輪転走面を有する外輪3とが同心に配置され、内輪転走面と外輪転走面との間に複数個の転動体(玉)4が配置される。この転動体4は、合成樹脂製の保持器5により保持される。また、内・外輪の軸方向両端開口部がシール部材6によりシールされ、少なくとも転動体4の周囲に上述のグリース組成物7が封入される。図2に示すように、保持器5は、軸方向に対向する2枚の合成樹脂製の環状体5a、5bを爪5dでスナップフィットにより固定したものである。2枚の環状体5a、5bの各対向面に、転動体(玉)4を収容する複数のポケット5cが周方向に間隔をおいて形成されている。
An example of the rolling bearing of the present invention will be described with reference to FIGS. 1 is a cross-sectional view of a deep groove ball bearing, and FIG. 2 is a partial cross-sectional view in the circumferential direction of the cage in FIG. As shown in FIG. 1, a rolling
2つの環状体5a、5bは、合成樹脂を射出成形して得られる。合成樹脂としては、例えば、ポリアミド樹脂、ポリフェニレンサルファイド樹脂、ポリエーテルエーテルケトン樹脂をベース樹脂とし、これらにガラス繊維や炭素繊維を配合した組成物が使用できる。なお、2つの環状体5a、5bは同一形状であり、同一の金型で射出成形できる。
The two
また、本発明では保持器の材質や形状は特に限定されず、図2に示す樹脂製の合わせ保持器ではなく、一体に成形された、もみ抜き型や冠型の樹脂製保持器や、金属製保持器に対しても適用できる。さらに、図2に示す樹脂製の合わせ保持器において、転動体である玉を収容する各ポケットの周方向両端部に、玉の外周に沿った凹球面を形成するとともに、各ポケットの軸方向両端部に、玉の外周に沿って保持器の半径方向に延びる円筒面を形成してもよい。本発明は、封入するグリースの改良により、樹脂製の合わせ保持器(特に、上記円筒面を有するもの)を用いた場合における異音の発生を防止している。 Further, in the present invention, 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. Furthermore, in the resin-made matching cage shown in FIG. 2, 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. The present invention prevents the generation of abnormal noise when using a resin-made mating cage (particularly, one having the cylindrical surface) by improving the grease to be enclosed.
本発明を実施例および比較例により具体的に説明するが、これらの例によって何ら限定されるものではない。 The present invention will be specifically described with reference to examples and comparative examples, but is not limited to these examples.
実施例1〜5、比較例1〜4
まず、表1に示す配合で基油を単独で、または、混合して調整した。次に、この基油の半量に、表1に示す割合で、4,4'−ジフェニルメタンジイソシアネート(日本ポリウレタン工業製ミリオネートMT、以下「MDI」と記す)を溶解し、残りの半量の基油にMDIの2倍当量となるモノアミンを溶解した。MDIを溶解した溶液を撹拌しながらモノアミンを溶解した溶液を加えた後、100〜120℃で30分間撹拌を続けて反応させて、ジウレア化合物を基油中に生成させベースグリースを得た。これに添加剤を表1に示す配合割合で加えてさらに十分撹拌した。その後、三本ロールで均質化し、供試グリースを得た。添加したアルカノールアミンは、いずれもジエタノールアミン(ADEKA社製アデカキクルーブFM−812)であり、モリブデン酸塩は、モリブデン酸ナトリウムである。
Examples 1-5, Comparative Examples 1-4
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 the 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 with stirring at 100 to 120 ° C. for 30 minutes to produce a diurea compound in the base oil to obtain a base grease. 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.
得られたグリースについて急加減速試験および音響測定試験を行なった。試験方法および試験条件を以下に示す。 The obtained grease was subjected to a rapid acceleration / deceleration test and an acoustic measurement test. Test methods and test conditions are shown below.
<急加減速試験>
回転軸を支持する内輪回転の転がり軸受(内輪・外輪・鋼球は軸受鋼SUJ2)に上記グリースを封入し、急加減速試験を行なった。急加減速試験条件は、25℃の雰囲気下、回転軸先端に取り付けたプーリに対する負荷荷重を1960N、回転速度は0rpm〜18000rpmで運転条件を設定し、摩耗による新生面の露出を促すためにグリース中に1質量%の鉄粉を混入させ、さらに、試験軸受(6203)内に1.0Aの電流が流れる状態で試験を実施した。そして、軸受内に異常剥離が発生し、振動検出器の振動が設定値以上になって停止する時間(剥離発生寿命(h))を計測した。結果を表1に併記する。
<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 rotational 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.
<音響試験>
サーボモータ試験機に、上記グリースを封入した転がり軸受(6312:樹脂製合わせ保持器(図2参照)、円筒面あり)を組み込み、軸に取り付けたプーリをベルトで引っ張る形でベルト荷重3400Nを加えつつ、回転速度1000rpmから7000rpmまで1000rpmずつステップアップし、各回転数での音響(異音の発生)を聴覚により確認した。7つの回転数のうち、大きな異音が発生した場合の個数の合計が、0個のものを「○」、1個のものを「△」、2個以上のものを「×」とした。結果を表1に併記する。
<Sound test>
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, “Δ” for one, and “×” for two or more. The results are also shown in Table 1.
表1に示すように、所定のベースグリースにアルカノールアミン(ジエタノールアミン)またはモリブデン酸塩を配合した各実施例は、剥離発生寿命時間を延長しつつ、異音の発生を防止できていた。なお、異音については、必ずしも回転数が高いときに発生するのではなく、同構成の試験軸受について、低い回転数で発生し、高い回転数でしない場合もあった。 As 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.
本発明の転がり軸受は、水素脆性による軸受転走面での剥離を効果的に防止しつつ、異音の発生を防止できるので、各種転がり軸受に適用できる。特に、軸方向に対向する2枚の合成樹脂製の環状体からなる保持器を用いた転がり軸受であり、既存のグリースを用いる場合では異音発生のおそれがあるものに好適に利用できる。 The rolling bearing of the present invention can be applied to various rolling bearings because it can prevent the occurrence of abnormal noise while effectively preventing separation on the bearing rolling surface due to hydrogen embrittlement. In particular, 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.
1 転がり軸受
2 内輪
3 外輪
4 転動体
5 保持器
6 シール部材
7 グリース組成物
DESCRIPTION OF
Claims (6)
前記グリース組成物は、基油と、増ちょう剤と、アルカノールアミンおよびモリブデン酸塩から選ばれる少なくとも1つの添加剤とを含み、
前記基油は、40℃における動粘度が30〜70mm2/sであるポリ−α−オレフィン油であり、
前記増ちょう剤は、ジイソシアネート成分とモノアミン成分とを反応して得られるジウレア化合物であり、前記モノアミン成分が脂肪族モノアミンおよび脂環式モノアミンであり、
前記添加剤は、前記基油および前記増ちょう剤の合計量100重量部に対して0.1〜10重量部含まれることを特徴とする転がり軸受。 A rolling bearing comprising 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, wherein a grease composition is sealed around the rolling elements. ,
The grease composition includes a base oil, a thickener, and at least one additive selected from alkanolamine and molybdate,
The base oil is a poly-α-olefin oil having a kinematic viscosity at 40 ° C. of 30 to 70 mm 2 / s,
The thickener is a diurea compound obtained by reacting a diisocyanate component and a monoamine component, and the monoamine component is an aliphatic monoamine and an alicyclic monoamine,
The rolling bearing according to claim 1, wherein the additive is included in an amount of 0.1 to 10 parts by weight with respect to 100 parts by weight of the total amount of the base oil and the thickener.
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018074555A1 (en) * | 2016-10-21 | 2018-04-26 | Ntn株式会社 | Ball bearing |
DE112017002507T5 (en) | 2016-07-05 | 2019-03-07 | Semiconductor Energy Laboratory Co., Ltd. | Positive electrode active material, method for producing the positive electrode active material and secondary battery |
WO2021153258A1 (en) * | 2020-01-31 | 2021-08-05 | Ntn株式会社 | Grease composition and grease-sealed bearing |
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---|---|---|---|---|
CN107956793B (en) * | 2017-12-04 | 2019-05-03 | 吴银辉 | A kind of thrust ball bearing and the excavator including thrust ball bearing |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002180077A (en) * | 2000-12-08 | 2002-06-26 | Ntn Corp | Lubricant composition and bearing |
JP2005112902A (en) * | 2003-10-03 | 2005-04-28 | Ntn Corp | Grease composition and grease-sealed bearing |
JP2006316082A (en) * | 2005-05-10 | 2006-11-24 | Ntn Corp | Grease composition and grease-sealed rolling bearing |
JP2006342939A (en) * | 2005-06-10 | 2006-12-21 | Ntn Corp | Rotation transmission device with built-in one-way clutch |
JP2007327638A (en) * | 2006-05-10 | 2007-12-20 | Ntn Corp | One-way clutch |
JP2008064157A (en) * | 2006-09-05 | 2008-03-21 | Ntn Corp | Synthetic resin-made cage |
JP2008115304A (en) * | 2006-11-06 | 2008-05-22 | Cosmo Sekiyu Lubricants Kk | Urea grease composition for resin |
JP2008143979A (en) * | 2006-12-07 | 2008-06-26 | Nsk Ltd | Grease composition and roller bearing |
JP2009108263A (en) * | 2007-10-31 | 2009-05-21 | Nsk Ltd | Grease composition and rolling bearing |
JP2009299897A (en) * | 2009-07-22 | 2009-12-24 | Ntn Corp | Rolling bearing for automobile electric equipment/accessory |
-
2015
- 2015-01-16 JP JP2015006733A patent/JP6534816B2/en active Active
-
2016
- 2016-01-15 WO PCT/JP2016/051088 patent/WO2016114380A1/en active Application Filing
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002180077A (en) * | 2000-12-08 | 2002-06-26 | Ntn Corp | Lubricant composition and bearing |
JP2005112902A (en) * | 2003-10-03 | 2005-04-28 | Ntn Corp | Grease composition and grease-sealed bearing |
JP2006316082A (en) * | 2005-05-10 | 2006-11-24 | Ntn Corp | Grease composition and grease-sealed rolling bearing |
JP2006342939A (en) * | 2005-06-10 | 2006-12-21 | Ntn Corp | Rotation transmission device with built-in one-way clutch |
JP2007327638A (en) * | 2006-05-10 | 2007-12-20 | Ntn Corp | One-way clutch |
JP2008064157A (en) * | 2006-09-05 | 2008-03-21 | Ntn Corp | Synthetic resin-made cage |
JP2008115304A (en) * | 2006-11-06 | 2008-05-22 | Cosmo Sekiyu Lubricants Kk | Urea grease composition for resin |
JP2008143979A (en) * | 2006-12-07 | 2008-06-26 | Nsk Ltd | Grease composition and roller bearing |
JP2009108263A (en) * | 2007-10-31 | 2009-05-21 | Nsk Ltd | Grease composition and rolling bearing |
JP2009299897A (en) * | 2009-07-22 | 2009-12-24 | Ntn Corp | Rolling bearing for automobile electric equipment/accessory |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE112017002507T5 (en) | 2016-07-05 | 2019-03-07 | Semiconductor Energy Laboratory Co., Ltd. | Positive electrode active material, method for producing the positive electrode active material and secondary battery |
DE202017007585U1 (en) | 2016-07-05 | 2023-07-13 | Semiconductor Energy Laboratory Co., Ltd. | Positive electrode active material and secondary battery |
DE202017007594U1 (en) | 2016-07-05 | 2023-09-11 | Semiconductor Energy Laboratory Co., Ltd. | Positive electrode active material and secondary battery |
DE202017007629U1 (en) | 2016-07-05 | 2023-09-29 | Semiconductor Energy Laboratory Co., Ltd. | Positive electrode active material and secondary battery |
DE202017007624U1 (en) | 2016-07-05 | 2023-10-04 | Semiconductor Energy Laboratory Co., Ltd. | Positive electrode active material and secondary battery |
DE202017007669U1 (en) | 2016-07-05 | 2024-02-08 | Semiconductor Energy Laboratory Co., Ltd. | Positive electrode active material and secondary battery |
WO2018074555A1 (en) * | 2016-10-21 | 2018-04-26 | Ntn株式会社 | Ball bearing |
JP2018066459A (en) * | 2016-10-21 | 2018-04-26 | Ntn株式会社 | Ball bearing |
CN109844337A (en) * | 2016-10-21 | 2019-06-04 | Ntn株式会社 | Ball bearing |
US10914343B2 (en) | 2016-10-21 | 2021-02-09 | Ntn Corporation | Ball bearing |
JP7108373B2 (en) | 2016-10-21 | 2022-07-28 | Ntn株式会社 | ball bearing |
WO2021153258A1 (en) * | 2020-01-31 | 2021-08-05 | Ntn株式会社 | Grease composition and grease-sealed bearing |
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