Abstract: A rolling bearing for rotatably supporting a rotating shaft; a housing for externally covering the rolling bearing in the radial direction of the rotating shaft; a sleeve disposed inside the housing in the radial direction of the rotating shaft with a gap there between and provided so as to be incapable of being displaced relative to an outer ring in the radial direction and circumferential direction of the rotating shaft; and a damper provided between the housing and the sleeve to support the sleeve so that the sleeve can be displaced relative to the housing in the axial direction of the rotating shaft, the damper absorbing the displacement of the sleeve in the radial direction of the rotating shaft.

Abstract: This turbocharger includes a rotating shaft extending along an axis, a turbine wheel provided at a first end portion of the rotating shaft, a compressor wheel provided at a second end portion of the rotating shaft, a housing accommodating at least a portion of the rotating shaft, bearings provided in the housing and configured to support the rotating shaft, supply flow paths supplying lubricating oil to the bearings, a discharge oil chamber formed in the housing and to which the lubricating oil is discharged from the bearings, and an oil drainage port formed below the discharge oil chamber, in which at least one of the discharge oil chamber and the oil drainage port is formed to be asymmetric between a first region and a second region defined by a vertical plane including the axis of the rotating shaft as a boundary plane.

Abstract: The present invention provides a supercharger with an electric motor having improved cooling performance for bearings, in the case of employing a grease lubrication system as a lubrication system of the bearings. A supercharger with an electric motor includes: a rotary shaft; a compressor wheel; a compressor housing for housing the compressor wheel; an electric motor including a motor rotor and a motor stator, and giving rotation force to the rotary shaft; a motor housing, for housing the electric motor; a first grease-sealed bearing for rotatably supporting the rotary shaft; and a bearing housing for housing the first grease-sealed bearing, and disposed between the compressor housing and the motor housing. Inside the bearing housing, a cooling passage through which a cooling medium flows is provided in a circumferential direction on an outer circumferential side of the first grease-sealed bearing.

Abstract: The present invention is provided with: a rolling bearing (16) for rotatably supporting a rotating shaft (6); a housing (17) for externally covering the rolling bearing (16) in the radial direction of the rotating shaft (6); a damping member (18) disposed inside the housing (17) in the radial direction of the rotating shaft (6) with a gap (S1) therebetween and provided so as to be incapable of being displaced relative to an outer ring (21) in the radial direction and circumferential direction of the rotating shaft (6); and a damper (19) provided between the housing (17) and the damping member (18) to support the damping member (18) so that the damping member (18) can be displaced relative to the housing (17) in the axial direction of the rotating shaft (6), the damper (19) absorbing the displacement of the damping member (18) in the radial direction of the rotating shaft (6).

Abstract: A turbocharger according to an embodiment of the present invention includes a rotating shaft, a compressor, a turbine, a compressor-side floating bearing and a turbine-side floating bearing that rotatably support the rotating shaft, and a bearing housing that houses the compressor-side floating bearing and the turbine-side floating bearing, the bearing housing being internally provided with a turbine-side oil feeding passage through which oil to be fed to the turbine-side floating bearing flows and a compressor-side oil feeding passage through which oil to be fed to the compressor-side floating bearing flows. A ratio of an oil feeding pressure for oil at an outlet of the compressor-side oil feeding passage to an oil feeding pressure for oil at an outlet of the turbine-side oil feeding passage is configured to be higher than 1.0 and lower than 1.5.

Abstract: The present invention provides a supercharger with an electric motor having improved cooling performance for bearings, in the case of employing a grease lubrication system as a lubrication system of the bearings. A supercharger with an electric motor includes: a rotary shaft; a compressor wheel; a compressor housing for housing the compressor wheel; an electric motor including a motor rotor and a motor stator, and giving rotation force to the rotary shaft; a motor housing, for housing the electric motor; a first grease-sealed bearing for rotatably supporting the rotary shaft; and a bearing housing for housing the first grease-sealed bearing, and disposed between the compressor housing and the motor housing. Inside the bearing housing, a cooling passage through which a cooling medium flows is provided in a circumferential direction on an outer circumferential side of the first grease-sealed bearing.