| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing device for a turbocharger, which can reduce torque loss by decreasing a stirring resistance of an engine oil.SOLUTION: A bearing device 1 for a turbocharger includes: a pair of roller bearings 2 separately disposed in a shaft direction and supporting a rotary shaft 32 of a turbocharger T in a manner of freely rotating; a bearing housing 7 retaining each rotary shaft 2 at an inner circumference of both end parts in the shaft direction; and an inner ring spacer 8 fitted from outside to the rotary shaft 32 between inner rings 3 of each rotary shaft 2. In the center part of the bearing housing 7 in the shaft direction, an oil supplying path 11 for supplying an engine oil toward the center in the shaft direction of the inner ring spacer 8 and an oil discharging path 12 for discharging the engine oil supplied to outside are formed at separate positions in the circumference direction. Also, at the center part in the shaft direction of the outer circumference of the inner ring spacer 8, a groove 10 for temporarily reserving the engine oil supplied from the oil supplying path 11 and guiding part of the reserved engine oil to the oil discharging path 12. |
