Squeeze film damper bearing device

A squeeze film damper bearing device comprising an inner race that is fitted around an outer periphery of a rotating shaft, an outer race that is supported on an inner periphery of a bearing retaining member with an annular space defined between an outer periphery of the outer race and the inner periphery of the bearing retaining member, a plurality of rolling bodies that are disposed between the inner race and the outer race, and an oil supply source that supplies oil to the annular space via an oil passage so as to form a squeeze film,

• wherein the squeeze film damper bearing device further comprises:
• an open/close valve that opens and closes the oil passage;
• and
• an electronic control unit in communication with a rotational speed detector that detects a rotational speed of the rotating shaft, the electronic control unit controlling operation of the open/close valve,
• wherein when the rotational speed of the rotating shaft detected by the rotational speed detector reaches a predetermined rotational speed, the electronic control unit controls the open/close valve so as to change oil pressure of the squeeze film to change vibration characteristics of the rotating shaft.