Mitsubishi Heavy Industries Limited

Mitsubishi Heavy Industries Marine Machinery & Equipment Co., Ltd.

Ryoji Sasaki

Tadashi Yoshida

Takeshi Tsuji

Hidetaka Nishimura

Yoshihisa Ono

Musashi Sakamoto

A contact vibration detection devicefor detecting contact vibration due to contact between a rotational shaftand a stationary partincludes: a rotation waveform determination unitconfigured to determine a rotation waveform of the rotational shaftbased on displacement of the rotational shaftduring rotation; a parameter change detection unitconfigured to detect a change in a parameter of at least one of an effective value of the rotation waveform or a phase angle of the rotation waveform; and a contact vibration determination unitconfigured to determine whether the contact vibration occurs based on presence or absence of the change in the parameter.

Contact vibration detection device, rotary machine including the same, and contact vibration detection method

A method of suppressing shaft vibration of a turbocharger capable of being driven by a motor includes: a specific-vibration-state determination step of determining whether a rotor shaft of the turbocharger is in a specific vibration state in which a magnitude of shaft vibration of the rotor shaft is, or is likely to be, greater than a predetermined magnitude; an excited state determination step of determining whether the motor is in an excited state in which an exciting voltage is applied to the motor; and a vibration suppression execution step of applying the exciting voltage to the motor if it is determined that the rotor shaft is in the specific vibration state in the specific-vibration-state determination step and it is determined that the motor is not in the excited state in the excited state determination step.

Vibration suppression method and vibration suppression apparatus for turbocharger capable of being driven by motor

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Tokyo, Japan

Ryoji Sasaki