JP6884236B2 - Rolling bearings with lubricant - Google Patents
Rolling bearings with lubricant Download PDFInfo
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- JP6884236B2 JP6884236B2 JP2019571057A JP2019571057A JP6884236B2 JP 6884236 B2 JP6884236 B2 JP 6884236B2 JP 2019571057 A JP2019571057 A JP 2019571057A JP 2019571057 A JP2019571057 A JP 2019571057A JP 6884236 B2 JP6884236 B2 JP 6884236B2
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- 238000005096 rolling process Methods 0.000 title claims description 52
- 239000000314 lubricant Substances 0.000 title claims description 45
- 239000011651 chromium Substances 0.000 claims description 14
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 12
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 12
- 229910052804 chromium Inorganic materials 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 229910052750 molybdenum Inorganic materials 0.000 claims description 12
- 239000011733 molybdenum Substances 0.000 claims description 12
- 229910052720 vanadium Inorganic materials 0.000 claims description 12
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 12
- 239000002199 base oil Substances 0.000 claims description 10
- 230000003647 oxidation Effects 0.000 claims description 7
- 238000007254 oxidation reaction Methods 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 229910010293 ceramic material Inorganic materials 0.000 claims description 4
- 239000000344 soap Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229920013639 polyalphaolefin Polymers 0.000 claims description 3
- 239000002562 thickening agent Substances 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052788 barium Inorganic materials 0.000 claims description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000010696 ester oil Substances 0.000 claims description 2
- 229910052744 lithium Inorganic materials 0.000 claims description 2
- 238000002156 mixing Methods 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Images
Classifications
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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
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
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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
- C10M169/02—Mixtures of base-materials and thickeners
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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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
- F16C33/32—Balls
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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
- F16C33/58—Raceways; Race rings
- F16C33/62—Selection of substances
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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
- F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
- F16C33/6633—Grease properties or compositions, e.g. rheological properties
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/028—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
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
- C10M2207/126—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic
- C10M2207/1265—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic used as thickening agent
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/2805—Esters used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/10—Amides of carbonic or haloformic acids
- C10M2215/102—Ureas; Semicarbazides; Allophanates
- C10M2215/1026—Ureas; Semicarbazides; Allophanates used as thickening material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
- C10N2020/02—Viscosity; Viscosity index
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/02—Bearings
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- 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
- F16C2204/00—Metallic materials; Alloys
- F16C2204/40—Alloys based on refractory metals
- F16C2204/44—Alloys based on chromium
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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
- F16C2204/00—Metallic materials; Alloys
- F16C2204/40—Alloys based on refractory metals
- F16C2204/46—Alloys based on molybdenum
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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
- F16C2204/00—Metallic materials; Alloys
- F16C2204/60—Ferrous alloys, e.g. steel alloys
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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
- F16C2322/00—Apparatus used in shaping articles
- F16C2322/39—General build up of machine tools, e.g. spindles, slides, actuators
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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
- F16C2361/00—Apparatus or articles in engineering in general
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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
- F16C2362/00—Apparatus for lighting or heating
- F16C2362/52—Compressors of refrigerators, e.g. air-conditioners
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Rolling Contact Bearings (AREA)
- Lubricants (AREA)
Description
本発明は、インナレースと、アウタレースと、空間的にインナレースとアウタレースとの間に配置された複数の転動体と、これらの転動体とそれぞれの軸受レースとの間の転がり接触部を潤滑し冷却するための潤滑剤とを備えた転がり軸受に関する。 The present invention lubricates the inner race, the outer race, a plurality of rolling elements spatially arranged between the inner race and the outer race, and the rolling contact portion between these rolling elements and the respective bearing races. With respect to rolling bearings with a lubricant for cooling.
特に高速回転する軸を支承する転がり軸受の重要な故障メカニズムの１つは、潤滑剤の短い使用期間である。転動体とそれぞれの軸受レースとの間の転がり接触部における潤滑不足は、特に高い運転温度との組み合わせたときの摩擦学的な過剰負荷によって発生する。潤滑不足を助長するメカニズムは、たとえば、特に転動体とそれぞれの軸受レースとの間のスリップ差を大きくする、高いスピン／ロール比（Bohr-Roll-Verhaeltnisse）である。特に、これにより潤滑剤の粘度が不都合に変化する。さらに、潤滑剤の劣化は、潤滑剤の一層の硬化につながる。転がり軸受内の潤滑剤は、通常は転動体セットによって、場合によっては衝突されない領域に押し退けられるので、潤滑剤の硬化時に、転がり接触部への潤滑剤からの基油の放出傾向が低下する。このことは、油放出による潤滑不足をもたらす。しばしば、両方の潤滑不足要因は同時に発生し、通常は潤滑剤の増大した急な破壊プロセスまたは転がり軸受の機能停止につながる。 In particular, one of the important failure mechanisms of rolling bearings that support shafts that rotate at high speed is the short period of use of the lubricant. Insufficient lubrication at the rolling contacts between the rolling elements and their respective bearing races is caused by tribological overload, especially in combination with high operating temperatures. The mechanism that promotes under-lubrication is, for example, a high spin / roll ratio (Bohr-Roll-Verhaeltnisse), which in particular increases the slip difference between the rolling elements and their respective bearing races. In particular, this unfavorably changes the viscosity of the lubricant. In addition, deterioration of the lubricant leads to further hardening of the lubricant. Since the lubricant in the rolling bearing is usually pushed away by the rolling element set to a region where it does not collide in some cases, the tendency of the base oil to be released from the lubricant to the rolling contact portion is reduced when the lubricant is cured. This results in insufficient lubrication due to oil release. Often, both underlubrication factors occur at the same time, usually leading to an increased sudden breakdown process of the lubricant or outage of rolling bearings.
高速回転とは、１分間に１００万回転を超える回転数であり、ｎ＊ｄｍに相当し、ここで、ｎは回転数であり、ｄｍは平均軸受直径である。たとえば、高速回転とは、１００ｍｍの平均軸受直径では、１分間に１０,０００回転であると理解される。 The high-speed rotation is a rotation speed exceeding 1 million rotations per minute, which corresponds to n * dm, where n is a rotation speed and dm is an average bearing diameter. For example, high speed rotation is understood to be 10,000 revolutions per minute with an average bearing diameter of 100 mm.
本発明の課題は、転がり軸受をさらに改良し、特に転がり軸受内に含まれる潤滑剤の使用期間を延長することにある。 An object of the present invention is to further improve the rolling bearing, and to extend the period of use of the lubricant contained in the rolling bearing in particular.
この課題は、請求項１に記載の特徴を備えた転がり軸受によって解決される。本発明の好適または有利な実施形態は、従属請求項、下記の説明ならびに添付の図面から明らかである。 This problem is solved by a rolling bearing having the characteristics according to claim 1. Suitable or advantageous embodiments of the present invention will be apparent from the dependent claims, the description below and the accompanying drawings.
本発明に係る転がり軸受は、レース材料から形成されているインナレースとアウタレースとを含み、インナレースは外周面に、アウタレースは内周面に、転動体をガイドするためのそれぞれ１つの軌道を有しており、転動体が、それぞれの軌道上で転動し、空間的にインナレースとアウタレースとの間に潤滑剤が配置されており、潤滑剤が少なくともインナレースおよび／またはアウタレースに接触し、レース材料が、少なくとも、鉄、炭素、クロム、モリブデンおよびバナジウムの合金構成成分を含んでおり、クロム対モリブデン対バナジウムの重量割合の比が、１対最低０．８〜最高１．５対最低０．５〜最高１．３である。 The rolling bearing according to the present invention includes an inner race and an outer race formed of a race material, the inner race has an outer race surface, the outer race has an inner peripheral surface, and one track for guiding a rolling element. The rolling elements roll on their respective orbits, and the lubricant is spatially placed between the inner race and the outer race, and the lubricant comes into contact with at least the inner race and / or the outer race. The lace material contains at least an alloy component of iron, carbon, chromium, molybdenum and vanadium, with a chromium to molybdenum to vanadium weight ratio ratio of 1: minimum 0.8 to maximum 1.5 to minimum 0. .5-Maximum 1.3 .
換言すると、重量割合は、Ｃｒ：Ｍｏ：Ｖ＝１：０．８〜１．５：０．５〜１．３である。したがって、転がり接触部を潤滑するために、インナレースまたはアウタレースに設けられた軌道への潤滑剤からの油流の制御が行われるように、クロム対モリブデン対バナジウムの重量割合によって潤滑剤の酸化が調節されることにより、転がり軸受、特に高速回転するスピンドル軸受における潤滑剤の使用期間を延長することができる。 In other words, the weight ratio is Cr: Mo: V = 1: 0.8 to 1.5: 0.5 to 1.3 . Thus the, to lubricate the contact portion rolling, so that the control of the oil flow from the lubricant to the track provided on the inner race or outer race is performed, the lubricant by weight ratio of chromium to molybdenum to vanadium By adjusting the oxidation, the period of use of the lubricant in rolling bearings, especially spindle bearings rotating at high speed, can be extended.
酸化とは、潤滑剤もしくは潤滑剤に含まれる基油の流動性の増大であると理解される。通常、潤滑剤の酸化は、望ましくないプロセスである。なぜならば、潤滑剤の酸化は潤滑剤のより速い浸みだしにつながるからである。浸みだしとは、潤滑剤からの基油の流出と理解される。レース材料内におけるクロム、バナジウム、モリブデンの意図的な配合により、潤滑剤の酸化が制御される。この場合、硬化が阻止されると同時に、潤滑剤の緩慢かつ意図的な浸みだしが実現される。このために、潤滑剤はレース材料に接触する。 Oxidation is understood to be an increase in the fluidity of the lubricant or the base oil contained in the lubricant. Oxidation of lubricants is usually an undesirable process. This is because oxidation of the lubricant leads to faster exudation of the lubricant. Exudation is understood to be the outflow of base oil from the lubricant. The deliberate blending of chromium, vanadium and molybdenum in the lace material controls the oxidation of the lubricant. In this case, curing is prevented and at the same time slow and intentional exudation of the lubricant is achieved. For this reason, the lubricant comes into contact with the lace material.
好適には、クロム対モリブデン対バナジウムの重量割合の比は、１対最低１．１〜最高１．３対最低０．６５〜最高０．８５である。換言すると、重量割合は、Ｃｒ：Ｍｏ：Ｖ＝１：１．１〜１．３：０．６５〜０．８５である。クロム対モリブデン対バナジウムのこの好適な重量割合の比は、潤滑剤の使用期間をさらに延長させる。 Preferably, the weight ratio of chromium to molybdenum to vanadium is 1: minimum 1.1 to maximum 1.3 to minimum 0.65 to maximum 0.85. In other words, the weight ratio is Cr: Mo: V = 1: 1.1 to 1.3: 0.65 to 0.85. This preferred weight ratio of chromium to molybdenum to vanadium further extends the life of the lubricant.
さらに好適には、転動体は、セラミック材料またはレース材料から形成されている。本発明によるレース材料から形成されているインナレースおよびアウタレースと、セラミック材料から成る転動体との組み合わせにより、潤滑剤の需要が減る。なぜならば、金属−セラミックのペアは、金属−金属のペアに比べて、同一の幾何学形状および負荷時に、より小さな接触面を形成するからである。さらに、粘着またはアブレシブ摩耗プロセスが金属−セラミックの材料ペアによって阻止される。 More preferably, the rolling elements are made of ceramic or lace material. The combination of inner laces and outer laces made of the race material according to the present invention and rolling elements made of the ceramic material reduces the demand for lubricants. This is because metal-ceramic pairs form smaller contact surfaces under the same geometry and load than metal-metal pairs. In addition, adhesive or abrasive wear processes are blocked by metal-ceramic material pairs.
本発明は、潤滑剤が、基油としてポリアルファオレフィンまたはエステル油を含んでいるという技術的な教示を含む。好適には、潤滑剤は、増ちょう剤として、ポリアリール尿素、リチウムコンプレックス石けん、またはバリウムコンプレックス石けんを含む。 The present invention includes the technical teaching that a lubricant contains a polyalphaolefin or ester oil as a base oil. Preferably, the lubricant comprises polyarylurea, lithium complex soap, or barium complex soap as the thickener.
好適な実施例によれば、潤滑剤は、ＤＩＮ ５１８２５による規格ＫＥＨＣ３Ｋ−５０でのスピンドル軸受グリースである。使用温度領域は、ＤＩＮ ５１８２５により、−５０℃〜１２０℃である。４０℃での基油ちょう度は、ＤＩＮ ５１５６２−１により、２２ｍｍ２／ｓである。さらに、ＤＩＮ ＩＳＯ ２１３７による混和ちょう度（１／１０ｍｍ）は、２２０〜２５０である。ＤＩＮ ５１８１８によるＮＬＧＩクラスは、３である。ＤＩＮ ＩＳＯ ２１７６による滴点は、２５０℃以上である。 According to a preferred embodiment, the lubricant is spindle bearing grease according to standard KEHC3K-50 according to DIN 51825. The operating temperature range is −50 ° C. to 120 ° C. according to DIN 51825. The base oil consistency at 40 ° C. is 22 mm 2 / s according to DIN 51562-1. Further, the mixing consistency (1/10 mm) according to DIN ISO 2137 is 220 to 250. The NLGI class according to DIN 51818 is 3. The drop point according to DIN ISO 2176 is 250 ° C. or higher.
別の好適な実施例によれば、潤滑剤は、ＤＩＮ ５１８２５による規格ＫＰＨＣ２／３Ｋ−４０でのスピンドル軸受グリースである。使用温度範囲は、ＤＩＮ ５１８２５により、−４０℃〜１２０℃である。４０℃での基油ちょう度は、ＤＩＮ ５１５６２−１により、２５ｍｍ２／ｓである。さらに、ＤＩＮ ＩＳＯ ２１３７による混和ちょう度（１／１０ｍｍ）は、２５０〜２６５である。ＤＩＮ ５１８１８によるＮＬＧＩクラスは、２または３である。ＤＩＮ ＩＳＯ ２１７６による滴点は、２２０℃以上である。 According to another preferred embodiment, the lubricant is spindle bearing grease to standard KPHC2 / 3K-40 according to DIN 51825. The operating temperature range is −40 ° C. to 120 ° C. according to DIN 51825. The base oil consistency at 40 ° C. is 25 mm 2 / s according to DIN 51562-1. Further, the mixing consistency (1/10 mm) according to DIN ISO 2137 is 250 to 265. The NLGI class according to DIN 51818 is 2 or 3. The drop point according to DIN ISO 2176 is 220 ° C. or higher.
本発明を改善する別の手段を、以下に本発明の好適な実施例の説明と一緒に添付の図面に基づき詳しく説明する。 Another means of improving the invention will be described in detail below with reference to the accompanying drawings, along with description of preferred embodiments of the invention.
図１によれば、工作機械（図示せず）用の本発明に係る転がり軸受１は、インナレース２と、アウタレース３と、半径方向でインナレース２とアウタレース３との間に配置された転動体６としての玉を含んでいる。転動体６は、保持器８によりガイドされる。転がり軸受１は、深溝玉軸受として形成されている。
According to FIG. 1, the rolling bearing 1 according to the present invention for a machine tool (not shown) is a rolling bearing 1 arranged between an
図２では、図１に示した転がり軸受１が軸９を支承している。軸９は、ここでは工作機械のスピンドル軸として形成されている。インナレース２は、外周面に、転動体６をガイドするための軌道４を有している。さらに、アウタレース３も、内周面に、転動体６をガイドするための軌道５を有している。転動体６は、インナレース２とアウタレース３との間でそれぞれの軌道４，５上を転動し、転動体６は、セラミック材料から形成されている。さらに、空間的にインナレース２とアウタレース３との間に、インナレース２と転動体６との間の転がり接触部ならびにアウタレース３と転動体６との間の転がり接触部を潤滑しかつ冷却するための潤滑剤７が配置されている。潤滑剤７は、インナレース２にもアウタレース３にも転動体６にも接触する。
In FIG. 2, the rolling bearing 1 shown in FIG. 1 supports the shaft 9. The shaft 9 is formed here as a spindle shaft of a machine tool. The
インナレース２とアウタレース３とは、レース材料から形成されている。レース材料は、少なくとも、鉄、炭素、クロム、モリブデンおよびバナジウムの合金構成成分を含んでいる。クロム対モリブデン対バナジウムの重量割合の比は、１対最低０．８〜最高１．５対最低０．５〜最高１．３である。潤滑剤７は、基油としてポリアルファオレフィンを含み、増ちょう剤としてポリアリール尿素を含む。レース材料内でのクロム、バナジウムおよびモリブデンの重量割合の意図的な配合により、潤滑剤７の酸化が制御され、硬化が阻止されると同時に、潤滑剤７からの基油の意図的な流れが実現される。これにより、転がり軸受１における潤滑剤７の使用期間が延長される。
The
１ 転がり軸受
２ インナレース
３ アウタレース
４ 軌道
５ 軌道
６ 玉
７ 潤滑剤
８ 保持器
９ 軸
1 Rolling bearing 2
Claims (5)
クロム対モリブデン対バナジウムの重量割合の比が、１対最低１．１〜最高１．３対最低０．６５〜最高０．８５であり、
クロム対モリブデン対バナジウムの前記重量割合によって、前記インナレース（２）または前記アウタレース（３）に設けられた前記軌道（４，５）への前記潤滑剤（７）からの基油の流れの制御が行われることで前記潤滑剤（７）の酸化が制御されることにより、前記転がり軸受（１）における前記潤滑剤（７）の使用期間が延長されることを特徴とする、転がり軸受（１）。 A rolling bearing (1) including an inner race (2) and an outer race (3) formed of a race material, wherein the inner race (2) is on the outer peripheral surface and the outer race (3) is on the inner peripheral surface. Each has one orbit (4,5) for guiding the rolling element (6), and the rolling element (6) rolls on each of the orbits (4,5) and is in space. A lubricant (7) is arranged between the inner race (2) and the outer race (3), and the lubricant (7) is at least the inner race (2) and / or the outer race. In a rolling bearing (1), in contact with (3), wherein the race material contains at least alloy components of iron, carbon, chromium, molybdenum and vanadium.
The weight ratio of chromium to molybdenum to vanadium is 1: minimum 1.1 to maximum 1.3 to minimum 0.65 to maximum 0.85.
Controlling the flow of base oil from the lubricant (7) to the trajectories (4,5) provided in the inner race (2) or the outer race (3) by the weight ratio of chromium to molybdenum to vanadium. The rolling bearing (1) is characterized in that the period of use of the lubricant (7) in the rolling bearing (1) is extended by controlling the oxidation of the lubricant (7). ).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
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| DE102017113704.1 | 2017-06-21 | ||
| DE102017113704.1A DE102017113704A1 (en) | 2017-06-21 | 2017-06-21 | Rolling bearings with lubricant |
| PCT/DE2018/100356 WO2018233746A1 (en) | 2017-06-21 | 2018-04-16 | Rolling element bearing having lubricant |
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| JP (1) | JP6884236B2 (en) |
| CN (1) | CN110785571B (en) |
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| DE102017113701A1 (en) * | 2017-06-21 | 2018-12-27 | Schaeffler Technologies AG & Co. KG | Noise- and wear-optimized rolling bearing for supporting a shaft |
| DE102020117116A1 (en) | 2020-06-30 | 2021-12-30 | Schaeffler Technologies AG & Co. KG | Process for the production of a bearing ring for a spindle bearing and spindle bearing |
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| JP2001018273A (en) * | 1999-07-06 | 2001-01-23 | Murata Mfg Co Ltd | Injection compression molding method and apparatus using three-plate mold |
| JP2001323939A (en) * | 2000-05-18 | 2001-11-22 | Nsk Ltd | Rolling bearing |
| JP2006169565A (en) * | 2004-12-14 | 2006-06-29 | Nsk Ltd | Unit for supporting roller |
| JP2008057691A (en) * | 2006-08-31 | 2008-03-13 | Nsk Ltd | Ball bearing |
| JP2014009714A (en) * | 2012-06-28 | 2014-01-20 | Nsk Ltd | Rolling bearing |
| DE102014221305B4 (en) * | 2014-10-21 | 2016-11-03 | Schaeffler Technologies AG & Co. KG | roller bearing |
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| DE102017113704A1 (en) | 2018-12-27 |
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