COOLING STRUCTURE OF BEARING DEVICE

• Main Authors: YAMAMOTO YOHEI, FUKADA KIKUO, MORI MASATSUGU, ONDA YUJI, YOSHINO MASATO
• Format: Patent
• Language: English; Japanese
• Published: 23.05.2016
• Subjects: BEARINGS; BLASTING; BORING; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOTDIRECTED TO A PARTICULAR RESULT; DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g.ARRANGEMENTS FOR COPYING OR CONTROLLING; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; LUBRICATING; MACHINE TOOLS; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OFPARTICULAR DETAILS OR COMPONENTS; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; TRANSPORTING; TURNING; WEAPONS

PROBLEM TO BE SOLVED: To provide a cooling structure of a bearing device which can efficiently cool a bearing, and can effectively suppress an impact sound between an air curtain and a cooling fluid caused by a swirl flow generated in the vicinity of rolling bodies.SOLUTION: In this bearing device, an outer ring spacer 4 and an inner ring spacer 5 are arranged while adjoining an outer ring 2 and an inner ring 3 of a rolling bearing 1, respectively. The outer ring 2 and the outer ring spacer 4 are arranged at a housing 8, and the inner ring 3 and the inner ring spacer 5 are fit to a rotating shaft 9. A nozzle 12 for injecting a cooling fluid R toward an external peripheral face 3b of the inner ring 3 is arranged at the outer ring spacer 4 while making a discharge port 12a side of the nozzle 12 directed frontward of the inner ring 3 in a rotation direction. An inclination angle α with respect to an axial direction of the nozzle 12 is set within a range of 50° to 90°.SELECTED DRAWING: Figure 1 【課題】 軸受を効率良く冷却することができ、転動体付近に発生する旋回流からなるエアカーテンと冷却用流体との衝突音を効果的に抑制することができる軸受装置の冷却構造を提供する。【解決手段】 この軸受装置は、転がり軸受１の外輪２および内輪３にそれぞれ隣接して外輪間座４および内輪間座４が配置されている。外輪２および外輪間座４はハウジング８に設置され、内輪３および内輪間座５は回転軸９に嵌合する。外輪間座４に、内輪３の外周面３ｂに向けて冷却用流体Ｒを噴射するノズル１２を、このノズル１２の吐出口１２ａ側を内輪３の回転方向の前方へ向けて設ける。このノズル１２の軸方向に対する傾斜角度αを５０°ないし９０°の範囲内とする。【選択図】 図１