Hitachi, Ltd.

The Kansai Electric Power Co., Inc.

The Kansai Electric Co., Inc.

The Kansai Elect. Power

Osamu Sugimoto

Hisao Inoue

Ichiro Hitomi

Teiji Horita

Akio Ito

Katsutoshi Nii

Kazuhiko Kawaike

Masuo Goto

Hiroshi Sugisaka

Haruo Nohara

Hidenori Sawa

Tadaatsu Kato

Takahiro Yoshioka

Makoto Obara

Koozi Aizawa

A furnace coiler capable of facilitating maintenance work and improving the yield and the productivity of the associated rolling system has a housing having an upper housing portion), a lower housing portion and a bottom housing portion. The bottom housing portion can be moved together with movable table rollers relative to the lower housing portion to opening the housing for maintenance work.

Furnace coiler

A lubricated bearing apparatus for a hydraulic machinery has rotary-side ceramic sliding plates disposed in contact with bearing-side ceramic sliding plates. The rotary-side ceramic sliding plates are disposed in receiving grooves of a main shaft sleeve member fixed to the main shaft. The main shaft sleeve member is provided with preventing portions for preventing the rotary-side ceramics sliding plates from being broken by the centrifugal force. Thus, ceramic materials can be used both on the rotary side and the bearing side, thereby lengthening the usable life of the bearing apparatus.

Lubricated bearing apparatus for hydraulic machinery

An end face mechanical shaft seal for use in a hydraulic machine includes a seal ring assembly detachably secured to a seal casing and having a sealing face which makes a sliding and fluid-tight contact with an annular seat face presented by a flange on the rotor shaft. The seal ring assembly is of a cartridge type which includes a ring casing having an annular groove formed in one end surface thereof and a seal ring partly received in the groove and fixed to the ring casing by an adhesive. Each of the ring casing and the seal ring is constituted by a plurality of arcuate sections or segments which are connected together in the circumferential direction.

End face mechanical shaft seal for use in hydraulic machines and seal

A control system for controlling the load of an AC motor/generator of secondary AC excitation type connected to a power system in parallel to at least a synchronous machine. The AC motor/generator has the secondary excitation winding thereof controlled in the amount of excitation so as to generate an output in accordance with an external output command. In the case of variation of power flow between the power system and the synchronous machine, the output command is corrected in accordance with the variation, and the amount of the secondary excitation is controlled by the corrected output command, whereby the variation of power flow between the power system and the synchronous machine is absorbed by the AC motor/generator thereby to prevent the synchronous machine from stepping out.

Control system for AC motor/generator of secondary AC excitation type

Growing community of inventors

Suita, Japan

Osamu Sugimoto