| 摘要 |
PROBLEM TO BE SOLVED: To simultaneously restrain resonance of a lateral bending primary mode and an oscillating mode. SOLUTION: This bearing part oil film rigidity control device of a turbocharger is provided with a clearance for forming an oil film 21 between at least a turbine shaft 5 and a bearing 20, and is provided with a bearing rotation control means 22 for controlling rotation of the bearing 20 for controlling rigidity of the oil film 21. The bearing rotation control means 22 includes a magnet rotor 23 arranged in the bearing 20, and a magnet stator 24 fixedly arranged on the outer peripheral side of the magnet rotor 23. When a rotational speed of the turbine shaft reaches a prescribed resonance rotating speed, a controller 25 supplies or takes out electric power to or from the magnet stator 24. |
