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1. WO2012105280 - FLUID DYNAMIC PRESSURE BEARING DEVICE

Publication Number WO/2012/105280
Publication Date 09.08.2012
International Application No. PCT/JP2012/050205
International Filing Date 06.01.2012
IPC
F16C 17/02 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
17Sliding-contact bearings for exclusively rotary movement
02for radial load only
F16C 33/10 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
02Parts of sliding-contact bearings
04Brasses; Bushes; Linings
06Sliding surface mainly made of metal
10Construction relative to lubrication
CPC
F16C 17/026
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
17Sliding-contact bearings for exclusively rotary movement
02for radial load only
026with helical grooves in the bearing surface to generate hydrodynamic pressure, e.g. herringbone grooves
F16C 32/06
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
32Bearings not otherwise provided for
06with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
F16C 33/107
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
02Parts of sliding-contact bearings
04Brasses; Bushes; Linings
06Sliding surface mainly made of metal
10Construction relative to lubrication
1025with liquid, e.g. oil, as lubricant
106Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
107Grooves for generating pressure
Applicants
  • NTN株式会社 NTN CORPORATION [JP]/[JP] (AllExceptUS)
  • 國米 広道 KOKUMAI Hiromichi [JP]/[JP] (UsOnly)
  • 原田 和慶 HARADA Kazuyoshi [JP]/[JP] (UsOnly)
  • 古森 功 KOMORI Isao [JP]/[JP] (UsOnly)
Inventors
  • 國米 広道 KOKUMAI Hiromichi
  • 原田 和慶 HARADA Kazuyoshi
  • 古森 功 KOMORI Isao
Agents
  • 城村 邦彦 SHIROMURA Kunihiko
Priority Data
2011-01835731.01.2011JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) FLUID DYNAMIC PRESSURE BEARING DEVICE
(FR) DISPOSITIF DE PALIER À PRESSION DYNAMIQUE DE FLUIDE
(JA) 流体動圧軸受装置
Abstract
(EN) Desired bearing performance may be maintained stably with a fluid dynamic pressure bearing device supporting relative rotation both in normal and reverse directions. A fluid dynamic pressure bearing device (1) comprises: a first portion (B1) in which a dynamic pressure groove portion (B) where a plurality of axially inclined dynamic pressure grooves (4) are arranged in a circumferential direction is disposed at an outer circumferential surface (2a) of a shaft member (2) or an inner circumferential surface (3a) of a bearing member (3) forming a radial bearing clearance, and the dynamic pressure groove portion (B) generates fluid pressure at the radial bearing clearance when the bearing member (3) and the shaft member (2) rotate relatively in the normal direction; and a second portion (B2) generating fluid pressure at the radial bearing clearance when the bearing member (3) and the shaft member (2) rotate relatively in the reverse direction. An annular convex portion (6), which is closer to the shaft member (2) than to a fillet of the dynamic pressure groove (4), is disposed at a portion forming an edge of a side open to the atmosphere of the radial bearing clearance in the dynamic pressure groove portion (B) disposed in the inner circumferential surface (3a) of the bearing member (3).
(FR) L'invention porte sur un dispositif de palier. Il est possible de conserver de façon stable des performances de portée désirées à l'aide d'un dispositif de palier à pression dynamique de fluide qui supporte une rotation relative aussi bien dans le sens normal que dans le sens inverse. Un dispositif de palier à pression dynamique de fluide (1) comprend : une première partie (B1) dans laquelle une partie à rainures de pression dynamique (B), où une pluralité de rainures de pression dynamique (4) inclinées axialement sont disposées dans une direction circonférentielle, est disposée dans une surface circonférentielle extérieure (2a) d'un élément arbre (2) ou dans une surface circonférentielle intérieure (3a) d'un élément palier (3) en formant une fente de palier radiale, et la partie à rainures de pression dynamique (B) engendre une pression de fluide dans la fente de palier radiale lorsque l'élément palier (3) et l'élément arbre (2) tournent l'un par rapport à l'autre dans le sens normal ; et une seconde partie (B2) qui engendre une pression de fluide dans la fente de palier radiale lorsque l'élément palier (3) et l'élément arbre (2) tournent l'un par rapport à l'autre dans le sens inverse. Une partie convexe annulaire (6) qui est plus proche de l'élément arbre (2) que d'un listel de la rainure de pression dynamique (4) est disposée dans une partie qui forme un bord d'un côté ouvert sur l'atmosphère de la fente de palier radiale dans la partie à rainures de pression dynamique (B) disposée dans la surface circonférentielle intérieure (3a) de l'élément palier (3).
(JA)  正逆両方向の相対回転を支持する流体動圧軸受装置において、所期の軸受性能を安定的に維持可能とする。 ラジアル軸受隙間を形成する軸受部材3の内周面3aまたは軸部材2の外周面2aに、軸方向に対して傾斜した動圧溝4を円周方向に複数配列した動圧溝領域Bが設けられ、この動圧溝領域Bが、軸受部材3と軸部材2の正方向への相対回転時にラジアル軸受隙間に流体動圧を発生させる第1領域B1と、軸受部材3と軸部材2の逆方向への相対回転時にラジアル軸受隙間に流体動圧を発生させる第2領域B2とを有する流体動圧軸受装置1である。軸受部材3の内周面3aに設けた動圧溝領域Bのうち、ラジアル軸受隙間の大気開放側の端部を形成する領域には、動圧溝4の溝底よりも軸部材2に近接する環状凸部6が設けられている。
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