BEARING AND BEARING UNIT

• Main Authors: NAKAMURA TOMOYA, INOUE WAKANA
• Format: Patent
• Language: English; Japanese
• Published: 27.09.2018
• Subjects: BEARINGS; BLASTING; COMBUSTION ENGINES; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINE PLANTS IN GENERAL; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; JET-PROPULSION PLANTS; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; NON-POSITIVE DISPLACEMENT PUMPS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; STEAM ENGINES; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To liquefy an ambient fluid which is evaporated by temperature rise caused when a bearing is cooled.SOLUTION: A bearing 12 includes: an inner ring 15; an outer ring 16; rolling elements 17 disposed between the inner ring 15 and the outer ring 16; and a retainer 18 which retains the rolling elements 17. The bearing 12 causes an ambient fluid having a cryogenic temperature to pass through an interior part to perform cooling. The bearing 12 includes: an inflow port 20 which is located at the upstream side in an ambient fluid flow direction and introduces the ambient fluid thereinto; and an outflow port 21 which is located at the downstream side of the inflow port 20 and discharges the ambient fluid flowing thereinto to the downstream side. The retainer 18 has: a body part 18a disposed between the inflow port 20 and the rolling elements 17; and a pocket 18b which retains the rolling elements 17 and opens to the downstream side.SELECTED DRAWING: Figure 3 【課題】軸受を冷却する際の温度上昇によって気化した周囲流体を液化する。【解決手段】軸受１２は、内輪１５と、外輪１６と、内輪１５と外輪１６との間に介在する複数の転動体１７と、転動体１７を保持する保持器１８とを備え、極低温の周囲流体を内部に通過させて冷却を行う。軸受１２は、周囲流体の流動方向における上流側に位置し、周囲流体を内部に導入する流入口２０と、流入口２０の下流側に位置し、内部に流入した周囲流体を下流側に排出する流出口２１とを備える。保持器１８は、流入口２０と転動体１７との間に配される本体部１８ａと、転動体１７を保持するとともに下流側に開放されるポケット１８ｂと、を有する。【選択図】図３