| 摘要 |
PROBLEM TO BE SOLVED: To provide a turbocharger excelling in responsiveness by raising temperature during rotation to reduce rolling resistance, since in the turbocharger of a structure supporting a rotating shaft with ball bearings, according to differences in heat radiation effect, the ball bearing on a compressor impeller side is low in temperature during rotation and high in kinematic viscosity of lubricating oil as compared with the ball bearing on a turbine side, and therefore rolling resistance of the same is larger than the ball bearing on the turbine side. ! SOLUTION: A rotating shaft member 22 present between a ball bearing 60 on a turbine 40 side and a ball bearing 70 on an impeller 50 side is made of a material having high heat conductivity and heat radiation from that portion is suppressed, so that temperature of the ball bearing 70 on the impeller 50 side is raised and the rolling resistance of the same can be reduced. ! COPYRIGHT: (C)2014,JPO&INPIT |
