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1. WO2022071195 - ROLLING BEARING AND ELECTRIC MOTOR

Publication Number WO/2022/071195
Publication Date 07.04.2022
International Application No. PCT/JP2021/035289
International Filing Date 27.09.2021
IPC
C10M 171/02 2006.1
CCHEMISTRY; METALLURGY
10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
171Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well defined but for which the chemical nature is either unspecified or only very vaguely indicated
02Specified values of viscosity or viscosity index
C10N 20/02 2006.1
CCHEMISTRY; METALLURGY
10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M59
20Specified physical properties of component of lubricating compositions
02Viscosity; Viscosity index
C10N 40/02 2006.1
CCHEMISTRY; METALLURGY
10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M59
40Specified use or application for which the lubricating composition is intended
02Bearings
F16C 19/06 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
CSHAFTS; FLEXIBLE SHAFTS; MECHANICAL MEANS FOR TRANSMITTING MOVEMENT IN A FLEXIBLE SHEATHING; ELEMENTS OF CRANKSHAFT MECHANISMS; PIVOTS; PIVOTAL CONNECTIONS; ROTARY ENGINEERING ELEMENTS OTHER THAN GEARING, COUPLING, CLUTCH OR BRAKE ELEMENTS; BEARINGS
19Bearings with rolling contact, for exclusively rotary movement
02with bearing balls essentially of the same size in one or more circular rows
04for radial load mainly
06with a single row of balls
F16C 33/66 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
CSHAFTS; FLEXIBLE SHAFTS; MECHANICAL MEANS FOR TRANSMITTING MOVEMENT IN A FLEXIBLE SHEATHING; ELEMENTS OF CRANKSHAFT MECHANISMS; PIVOTS; PIVOTAL CONNECTIONS; ROTARY ENGINEERING ELEMENTS OTHER THAN GEARING, COUPLING, CLUTCH OR BRAKE ELEMENTS; BEARINGS
33Parts of bearings; Special methods for making bearings or parts thereof
30Parts of ball or roller bearings
66Special parts or details in view of lubrication
H02K 7/08 2006.1
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
KDYNAMO-ELECTRIC MACHINES
7Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
08Structural association with bearings
CPC
C10M 171/02
CCHEMISTRY; METALLURGY
10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
MLUBRICATING COMPOSITIONS
171Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated
02Specified values of viscosity or viscosity index
C10N 2020/02
CCHEMISTRY; METALLURGY
10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
2020Specified physical ; or chemical properties or characteristics, i.e. function,; of component of lubricating compositions
01Physico-chemical properties
02Viscosity; Viscosity index
C10N 2040/02
CCHEMISTRY; METALLURGY
10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
2040Specified use or application for which the lubricating composition is intended
02Bearings
F16C 19/06
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
19Bearings with rolling contact, for exclusively rotary movement
02with bearing balls essentially of the same size in one or more circular rows
04for radial load mainly
06with a single row or balls
F16C 33/66
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
33Parts of bearings; Special methods for making bearings or parts thereof
30Parts of ball or roller bearings
66Special parts or details in view of lubrication
H02K 7/08
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
KDYNAMO-ELECTRIC MACHINES
7Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
08Structural association with bearings
Applicants
  • NTN株式会社 NTN CORPORATION [JP]/[JP]
Inventors
  • 小畑 智彦 OBATA Tomohiko
Agents
  • 和気 光 WAKI Hikaru
  • 和気 操 WAKI Misao
  • 寺本 諭史 TERAMOTO Satoshi
Priority Data
2020-16486830.09.2020JP
2020-16487530.09.2020JP
2021-03626508.03.2021JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) ROLLING BEARING AND ELECTRIC MOTOR
(FR) PALIER À ROULEMENT ET MOTEUR ÉLECTRIQUE
(JA) 転がり軸受および電動機
Abstract
(EN) The present invention provides: a rolling bearing which is able to be decreased in the bearing torque, and helps a highly efficient motor to meet the standards; and an electric motor in which this rolling bearing is incorporated. A rolling bearing 1 according to the present invention comprises an inner ring 2, an outer ring 3, a plurality of rolling bodies 4 that are interposed between the inner ring 2 and the outer ring 3, and a grease 7 that is sealed in the space within the bearing. The grease 7 contains a base oil that has a kinematic viscosity of 40 mm2/s or less at 40°C and a thickening agent; and if n is the apparent viscosity gradient in formula (1), said apparent viscosity gradient being calculated from the apparent viscosities of the grease 7 at at least two arbitrary shear rates as determined with use of a rheometer, and v is the kinematic viscosity of the base oil at 40°C, the value of (In(v))/n (wherein In(v) represents the natural logarithm of the kinematic viscosity v) is 5 or less. With respect to the symbols in the formula, η represents the apparent viscosity (Pa·s); n represents the apparent viscosity gradient; γ represents the shear rate (s-1); and a represents the intrinsic constant of each grease.
(FR) La présente invention concerne : un palier à roulement qui peut être réduit dans le couple de palier, et aide à un moteur hautement efficace de répondre aux normes ; et un moteur électrique dans lequel ce palier à roulement est incorporé. Un palier à roulement (1) selon la présente invention comprend une bague interne (2), une bague externe (3), une pluralité de corps de roulement (4) qui sont interposés entre la bague interne (2) et la bague externe (3), et une graisse (7) qui est scellée dans l'espace à l'intérieur du palier. La graisse contient une huile de base qui présente une viscosité cinématique de 40 mm2/s ou moins à 40 °C et un agent épaississant ; et si n est le gradient de viscosité apparent dans la formule (1), ledit gradient de viscosité apparent est calculé à partir des viscosités apparentes de la graisse (7) à au moins deux vitesses de cisaillement arbitraires telles que déterminées à l'aide d'un rhéomètre, et v est la viscosité cinématique de l'huile de base à 40 °C, la valeur de (In(v))/n ( ln(v) représentant le logarithme naturel de la viscosité cinématique v) est inférieur ou égal à 5. Par rapport aux symboles dans la formule, η représente la viscosité apparente (Pa·s) ; n représente le gradient de viscosité apparent ; γ représente le taux de cisaillement (s-1) ; et a représente la constante intrinsèque de chaque graisse.
(JA) 軸受トルクを低減でき、高効率モータの規格への適合に寄与する転がり軸受、および転がり軸受が組み込まれた電動機を提供する。転がり軸受1は、内輪2および外輪3と、この内輪2および外輪3間に介在する複数の転動体4と、軸受内空間に封入されたグリース7とを有し、グリース7は、40℃における動粘度が40mm/s以下の基油と増ちょう剤とを含み、かつ、レオメータを用いて測定される少なくとも2点以上の任意のせん断速度におけるグリース7の見かけ粘度から算出される下記式(1)中の見かけ粘度勾配nと、基油の40℃における動粘度vとから求められる[ln(v)]/n(ただし、ln(v)は動粘度vの自然対数を表す。)の値が5以下である。 ただし、式中の記号は、η:見かけ粘度[Pa・s]、n:見かけ粘度勾配、γ:せん断速度[s-1]、a:グリース種ごとの固有の定数である。
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