Kabushiki Kaisha Toshiba

Toshiba Energy Systems & Solutions Corporation

Tomohiko Tsukuda

Akihiro Onoda

Naoki Shibukawa

Tsuguhisa Tashima

Iwataro Sato

Kazutaka Tsuruta

Yuki Mimura

Shogo Iwai

Yoshifumi Iwasaki

Asako Inomata

Hiroshi Kawakami

Toshio Hirano

Sakae Kawasaki

Junichi Tominaga

Shinichiro Ohashi

Hiroyuki Kawagishi

Tomohiro Tejima

Yasuteru Kawai

Yukio Kanehira

According to an embodiment, a turbine shaft sealing device suppresses leakage of a working fluid between a rotary part, and a lower half stationary part and an upper half stationary. Six packing ring segments of the turbine shaft sealing device are formed of a lower half center segment and two lower half side segments, and an upper half center segment and two upper half side segments, and configure an annular packing ring having an inner peripheral ring part on which a hook that engages with a hook engagement annular groove of the lower half stationary part and the upper half stationary part, and a seal fin protruding toward the rotary part side are arranged. A biasing part is formed of a lower half center biasing part, a lower half side biasing part, an upper half side biasing part, and upper half center biasing part.

Turbine shaft sealing device

In one embodiment, a turbine monitoring system includes a temperature measurer configured to sense a temperature of steam to be introduced to a steam turbine, and output a sensing result of the temperature. The system further includes an electrical output measurer configured to sense an electrical output of a generator driven by the steam turbine, and output a sensing result of the electrical output. The system further includes a computing module configured to compute an erosion quantity of a moving vane of the steam turbine with water drops, based on the sensing result of the temperature that is output from the temperature measurer and the sensing result of the electrical output that is output from the electrical output measurer. The system further includes an outputting module configured to output information that is based on the erosion quantity computed by the computing module.

Turbine monitoring system and turbine monitoring method

A seal device according to the embodiment includes a seal fin provided between the rotation body and the stationary body and extending in a circumferential direction of the rotation body, and a swirl brake fin provided on the stationary body upstream of the seal fin. The swirl brake fin reduces a circumferential velocity component of the working fluid. The swirl brake fin has a negative pressure surface provided on a side of a rotation direction of the rotation body and a positive pressure surface provided on an opposite side to the negative pressure surface. The positive pressure surface extends in a direction opposite to the rotation direction of the rotation body from radially outward toward radially inward.

Seal device and turbomachine

A steam turbineaccording to an embodiment includes rotor bladesimplanted to a turbine rotor, stationary bladesmaking up a turbine stage together with the rotor blades, diaphragm outer ringsincluding an annular extending partsurrounding a periphery of the rotor blades, and supporting the stationary blades, and diaphragm inner ringssupporting the stationary blades. The steam turbinefurther includes an annular slitformed at an inner surface of the diaphragm outer ringbetween the stationary bladesand the rotor bladesalong a circumferential direction, and communication holesprovided in plural at an outer surface of the diaphragm outer ringalong the circumferential direction, communicated to the annular slitfrom the outer surface side, and communicated to an exhaust chamber sucking water films via the annular slit

Steam turbine

A sealing device for a turbine has a sealing member provided in a gap between a rotor and a stator arranged to surround the rotor, and a fluid path provided within the stator, to introduce, into the stator, a cooling medium used to cool stationary blades extending radially inward from the stator, and to flow the cooling medium at least to an upstream side of the sealing member.

Seal apparatus of turbine and thermal power system

An axial-flow turbine has turbine nozzles, a heat shield plate, a first communication hole formed in the turbine rotor and connected to the space, to flow a cooling medium, a first opening formed in at least any one of the two adjacent rotor disks, to be connected to the space, a second communication hole connected to the space through the first opening, to communicate with an implant unit of the turbine rotor blade in the rotor disk, a third communication hole connected to the second communication hole, to communicate along an effective length of the turbine rotor blade, a second opening formed in a side face of the turbine rotor blade, to be connected to the third communication hole, and a third opening formed in an outer circumferential end face of the turbine rotor blade, to be connected to the third communication hole.

Axial turbine and power plant

In a turbine rotor blade assembly, a length hin the radial direction of a bucket dovetailof a notch bladeis configured to be shorter than a length hin the radial direction of an effective blade portionof a adjacent notch bladeand a length hin the radial direction of the bucket dovetail. Thus, during an insertion of the notch bladein the axial direction, the rotational movement Rf around the radial direction and the circumferential movement of the notch bladecan be secured.

Turbine rotor blade assembly and steam turbine

In one embodiment, a calculation method of moisture loss in a steam turbine calculates first a wetness fraction at the inlet and outlet of each of stationary blade cascades and rotor blade cascades. Subsequently, the moisture loss is classified into (1) supersaturation loss, (2) condensation loss, (3) acceleration loss, (4) braking loss, (5) capture loss and (6) pumping loss, and a loss for calculation of the moisture loss is selected from the above losses (1) to (6) according to the wetness fraction of steam at the inlet and outlet of each blade cascade. An amount of each selected loss is calculated, and an amount of moisture loss at each blade cascade is calculated.

Growing community of inventors

Yokohama, Japan

Tomohiko Tsukuda