Kabushiki Kaisha Toshiba

Other

Hitoshi Sakakida

Takashi Sasaki

Kazuo Saito

Makoto Ochiai

Kenji Kamimura

Kazutaka Ikeda

Hisashi Matsuda

Hidehiko Kuroda

Michio Sato

Yoichi Tsuda

Toshio Hirano

Satoru Asai

Sueyoshi Mizuno

Shigeru Kanemoto

Yasushi Ooishi

Kohichi Nakayama

Kiyoto Oyagi

Tatsuo Yamashita

Kenji Osaki

Ikuo Saito

Ryohei Ogino

Takuhisa Kondo

Shuuichi Umezawa

Hajime Obikawa

Toshiaki Hirate

According to the embodiment, there is provided a blade vibration measuring apparatus, having, a contactless displacement sensor which outputs a displacement measurement signal as measuring a displacement of a turbine moving blade in a rotation axis direction, a blade top position identifying device which outputs a blade top position identification signal to identify a top position based on a distance between the contactless displacement sensor and the top position of the turbine moving blade as receiving the displacement measurement signal output from the contactless displacement sensor, and a blade vibration calculating device which calculates vibration amplitude and a vibration frequency of the turbine moving blade based on temporal variation of the distance between the contactless displacement sensor and the top position of the turbine moving blade as receiving the blade top position identification signal output from the blade top position identifying device.

Blade vibration measuring apparatus

A steam turbine has: a casing; a rotor rotatably arranged in the casing; a nozzle diaphragm concentrically arranged with respect to the rotor, the nozzle diaphragm being engaged with the casing; moving blades arranged in circumferential direction on outer circumference of the rotor at positions adjacent to the nozzle diaphragm; seal strips circumferentially extending on tips of the moving blades, the seal strips protruding in radial outward direction; and an abradable structure rigidly connected to the nozzle diaphragm. The abradable structure faces the seal strips in radial direction at a facing surface, and has an abradable part made of an abradable material arranged at the facing surface.

Steam turbine

A torque measuring device including a light irradiation element for irradiating a light, and a control unit operatively connected to the irradiation element so as to branch the light into a plurality of lights as beams and control a beam diameter of the respective lights so as to irradiate the lights on a surface of a member to be measured. The torque measuring device further includes a plurality of reflectors disposed on the surface of the member to be measured so as to change reflection state of the respective lights, a plurality of detectors for detecting the changes of intensities of the respective reflected lights and generating signals thereof, and a signal processor for processing the generated signals and operating a rotation period on the basis of the generated signals thereby to calculate a torque of the member to be measured.

Device for calculating a torque of a rotating member

Growing community of inventors

Tokyo, Japan

Hitoshi Sakakida