Kabushiki Kaisha Toshiba

Katsuhiko Naruse

Yukio Watanabe

Katsuhiko Sato

Yasuhiro Yuguchi

Motohiko Kimura

Yutaka Togasawa

Hiroaki Igakura

Kenji Kurihara

Seiki Soramoto

Yuuji Yasuda

Fukumi Shimizu

Shinzou Ogawa

A modular submersible repairing system includes a working unit having a tool module capable of repairing structures in a reactor. A scanning/pitching module is capable of being selectively connected to or disconnected from the tool module, and is provided with a scanning/pitching shaft for scanning or pitching the tool module. A submersible fan module is capable of being selectively connected to or disconnected from the scanning/pitching module. A first buoyant module keeps an orientation of the tool module. A base unit includes a manipulator module internally provided with an actuator driving mechanism. An adsorbing module is capable of being detachably mounted on the manipulator module and a wall. A second buoyant module keeps the orientation of the manipulator module. The scanning/pitching module and the manipulator module are provided with a submersible connecting device capable of being operated in water for engagement and disengagement.

Modular submersible repairing system and repairing method

Modular submersible repairing system

To improve the coupling adjustment workability and precision of a rotor, irrespective of change in bearing characteristics due to an increase of rotational speed, the apparatus detects angular frequencies (.omega.) and reference mark positions (.theta.) of the rotor; detects vibration displacements (r) of the rotor; analyzes vibration vector components (.omega.), (r) and (.theta.) of rotation synchronizing vibrations; extracts a specific angular frequency (.omega..sub.1) at which a higher harmonic vibration frequency (.omega..sub.R) matches a natural frequency of the rotor, and various rotation synchronizing vibration vector components at (.omega..sub.1), at (.omega..sub.R) and (.omega..sub.2 to .omega..sub.i), respectively; estimates static vibration vector components (r.sub.0, .theta..sub.0) at zero angular frequency (.omega..sub.0) on the basis of rotation synchronizing vibration vector components (r.sub.T, .theta..sub.T) at (.omega..sub.1 to .omega..sub.i) and in accordance with a polynomial; obtains dynamic vibration vector components (r.sub.n, .theta..sub.n) by subtracting the static vibration vector components (r.sub.0, .theta..sub.0) from the rotation synchronizing vibration vector components (r.sub.Tn, .theta..sub.Tn), respectively; identifies a vibration response function; and estimates an eccentric direction (.theta.) and an eccentric quantity (.delta.) to be adjusted on the basis of (r.sub.n, .theta..sub.n) at (.omega..sub.R) and at (.omega..sub.1 to .omega..sub.i) and in accordance with the identified vibration response function. Further, the real time vibration status of the rotor and the estimated eccentric direction and quantity are all displayed.

Apparatus for adjusting rotor

The vibration measuring apparatus of a rotating shaft is made up of a pair of projection groups provided radial directions of the shaft with spacings therebetween and having the same height, a source of measuring light for irradiating the projection groups, a light receiving element for receiving the measuring light reflected by the projection groups, and a calculating device for calculating a peripheral speed difference between the two projection groups spaced in the axial direction of the rotating shaft.

Method and apparatus for measuring vibrations of rotating shaft

Growing community of inventors

Yokohama, Japan

Katsuhiko Naruse